According to literary data,there are 189 species of the genus Astragalus that inhabit the territory of Kyrgyzstan.The distribution of species of the genus Astragalus(Fabaceae)was studied by taking into account their o...According to literary data,there are 189 species of the genus Astragalus that inhabit the territory of Kyrgyzstan.The distribution of species of the genus Astragalus(Fabaceae)was studied by taking into account their occurrence in soil-climatic and relief types of plant habitats in the mountainous territories of Kyrgyzstan.The materials were collected during organized research expeditions to natural areas of plant habitats.The occurrence of species was studied by well-known methods.As a result of such analysis we have made the following conclusions for the first time:in the flora of Kyrgyzstan there are 189 species of the genus Astragalus,they are representatives of 7 subgenera of this genus;species occur in 24 types of plant habitats with soil and relief features,taking into account the altitudinal regularity of taxa distribution in mountain phytocenoses;subgenuses and specific species characterized by broad,smallest and intermediate sizes of habitats were identified;groupings of plant habitat types on the territory of Kyrgyzstan characterized by the largest,smallest and intermediate indicators on the number of subgenuses and species of the genus Astragalus were identified.The botanical description of each species has been supplemented with new information about the species as a taxonomic unit.The materials of our work can be successfully used in the field of systematics,evolution and ecology of plants.展开更多
A nowhere-zero k-flow on a graph G=(V(G),E(G))is a pair(D,f),where D is an orientation on E(G)and f:E(G)→{±1,±2,,±(k-1)}is a function such that the total outflow equals to the total inflow at each vert...A nowhere-zero k-flow on a graph G=(V(G),E(G))is a pair(D,f),where D is an orientation on E(G)and f:E(G)→{±1,±2,,±(k-1)}is a function such that the total outflow equals to the total inflow at each vertex.This concept was introduced by Tutte as an extension of face colorings,and Tutte in 1954 conjectured that every bridgeless graph admits a nowhere-zero 5-flow,known as the 5-Flow Conjecture.This conjecture is verified for some graph classes and remains unresolved as of today.In this paper,we show that every bridgeless graph of Euler genus at most 20 admits a nowhere-zero 5-flow,which improves several known results.展开更多
To ensure the safety and efficacy of Chinese herbs,it is of great significance to conduct rapid quality detection of Chinese herbs at every link of their supply chain.Spectroscopic technology can reflect the overall c...To ensure the safety and efficacy of Chinese herbs,it is of great significance to conduct rapid quality detection of Chinese herbs at every link of their supply chain.Spectroscopic technology can reflect the overall chemical composition and structural characteristics of Chinese herbs,with the multi-component and multitarget characteristics of Chinese herbs.This review took the genus Paris as an example,and applications of spectroscopic technology with machine learning(ML)in supply chain of the genus Paris from seeds to medicinal materials were introduced.The specific contents included the confirmation of germplasm resources,identification of growth years,cultivar,geographical origin,and original processing and processing methods.The potential application of spectroscopic technology in genus Paris was pointed out,and the prospects of combining spectroscopic technology with blockchain were proposed.The summary and prospects presented in this paper will be beneficial to the quality control of the genus Paris in all links of its supply chain,so as to rationally use the genus Paris resources and ensure the safety and efficacy of medication.展开更多
As global warming persistently alters and rapidly reshapes landscapes and habitats, conventional species distribution models relying solely on maintaining static conditions within the current climate are likely to fal...As global warming persistently alters and rapidly reshapes landscapes and habitats, conventional species distribution models relying solely on maintaining static conditions within the current climate are likely to falter, particularly at the genus level. Hence, we hypothesize that climate change will differentially affect ecological niches of the same genus species with various latitudinal positioning and local topography, and the high-latitude species may experience greater niche contraction than low-latitude species, and that mountainous regions with high elevational variability may serve as critical climate refugia. Herein, we simulate niche alterations and integrate an ensemble model(EM) strategy, taking into account species dispersal limitations factors(topography, soil, and ultraviolet), to construct a comprehensive habitat suitability(CHS) model for assessing the future vulnerability of the Betula genus, most of which are timber species in China. Our findings reveal that the niche spatial(geographic distribution) of most species(62%) within the Betula genus will undergo a gradual decline under climate change, supporting our hypothesis of latitudinal differentiation in climate vulnerability. Intriguingly, the projected high-latitude niche reduction within the genus cannot be counterbalanced by the anticipated niche expansion of closely related species in low-latitude regions, even considering the evident latitudinal gradient distribution of species. Nonetheless, the niche spatial of six Betula species in southwestern China remains stable or expands under warming scenarios, strongly supporting our secondary hypothesis about topographic buffering effects, which probably means the unique topography(i.e., the largest elevation difference) of this region may serve as a sanctuary for preserving Betula genetic diversity. Our results underscore the uncertain nature of pre-existing niche systems at the genus level under climate change, emphasizing the need for diligent resource management and conservation planning for vulnerable timber species.展开更多
Based on a combination of morphology and molecular data of ribosomal DNA genes,a new diatom genus Lineaperpetua gen.nov.Yu,You,Kociolek&Wang is described.The features that help define Lineaperpetua at the level of...Based on a combination of morphology and molecular data of ribosomal DNA genes,a new diatom genus Lineaperpetua gen.nov.Yu,You,Kociolek&Wang is described.The features that help define Lineaperpetua at the level of genus include:a tangentially undulated valve face;continuous cribra areolae on the valve interior consisting of pores arranged as strips;single rimoportula located inside the ring of marginal fultoportulae.Additionally,phylogenetic analysis based on nuclear small subunit(SSU)rDNA sequences and nuclear large subunit(LSU)rDNA gene placed the three strains of L.lacustris in a single,monophyletic clade at a considerable sequence distance from the other genera(Thalassiosira,Conticribra,Planktoniella,Shinodiscus,and other genera)belonging to Thalassiosirales.Despite the similarities with some species of Thalassiosira,Conticribra,and Spicaticribra,the suite of features found in Lineaperpetua differentiate it from these other genera.These molecular data and morphological characters suggest an affinity of the new genus to the Thalassiosiraceae.展开更多
During our investigation of diatom biodiversity in Xizang,two species exhibited unique morphological features discriminative from all previously known genera.Herein we describe these two species and describe as new th...During our investigation of diatom biodiversity in Xizang,two species exhibited unique morphological features discriminative from all previously known genera.Herein we describe these two species and describe as new the genus,Spargeria gen.nov.The new genus features narrow to wide rectangular valves,narrow valve mantles,filiform raphe branches that occur on the valve face only,terminal raphe fissures straight or slightly deflected to same side,bow-tie shaped central areas,chambered striae present on the valve face only,being absent from the mantle,wider striae near the axial area and very narrow near the margin,multiseriate striae with small and round areolae that are occluded externally.Comparatively,Spargeria zhuii sp.nov.has larger and robust valves,radiate striae,with one divergent stria near the apices,while Spargeria chenia sp.nov.is smaller,with narrow valves,striae slightly radiate in the middle,becoming convergent or parallel near apices.This new genus belongs to the family Pinnulariaceae,and it was compared and contrasted with other genera of this family.Our work suggests the need for continued studies to document the biodiversity of diatoms in Xizang.展开更多
The flexed frustules in pennate diatoms are usually associated with monoraphid diatoms. Interestingly, we found a biraphid diatom species with flexed frustules in an offshore intertidal beach environment on Weizhou Is...The flexed frustules in pennate diatoms are usually associated with monoraphid diatoms. Interestingly, we found a biraphid diatom species with flexed frustules in an offshore intertidal beach environment on Weizhou Island,Beihai City, Guangxi Zhuang Autonomous Region, China. Therefore, based on morphological characteristics, we described a new genus of diatoms Yuzaoea sinensis gen. et sp. nov. CH Li, HH Liu, YH Gao & CP Chen. The frustule of this genus is characterized by heterogeneous frustule with one concave valve and one convex valve,complete raphe on both valves, straight and moderately eccentric raphe, uniseriate striae and girdle bands with a single row of areolae. The most identifying feature of this genus was the flexed frustule, which is rare in biraphid diatoms and common in monoraphid diatoms. We compared the morphometric characteristics of genus Yuzaoea with genus Rhoikoneis and several genera within the family Rhoicospheniaceae, including Rhoicosphenia,Campylopyxis, and Cuneolus. Phylogenetic analyses based on SSU rRNA and rbc L showed that the genus Yuzaoea was the sister group to the clade of Rhoicosphenia with a high support value(bootstrap values = 100%), and the clade “Yuzaoea+Rhoicosphenia” was sister to the clade of monoraphid diatoms, in which the genera Achnanthidium, Planothidium and some Cocconeis with high support values(bootstrap = 100%).Morphologically, the genus Yuzaoea shares many morphological features with monoraphid diatoms like genera Achnanthidium and Planothidium and the members within the Rhoicospheniaceae. Therefore, based on a combined morphological studies and phylogenetic results we suggested that this branch may represented the evolution of one kind monoraphid diatoms, from biraphid diatoms(e.g. genus Yuzaoea), to incompleted biraphid diatoms(e.g. genera Rhoicosphenia, Campylopyxis), to monoraphid diatoms(e.g. genera Achnanthidium and Planothidium).展开更多
Against the backdrop of a global paper resource shortage,there is a growing need to identify fast-growing tree species capable of producing long-lasting paper.Three plant species namely Broussonetia kazinoki,Broussone...Against the backdrop of a global paper resource shortage,there is a growing need to identify fast-growing tree species capable of producing long-lasting paper.Three plant species namely Broussonetia kazinoki,Broussonetia papyrifera and hybrid paper mulberry,belong to the Broussonetia genus,were collected from China to study their white bark suitability for pulp and papermaking.Their chemical composition revealed that the holocellulose content in Broussonetia kazinoki and Broussonetia papyrifera was more than 80%.The molecular weight distribution of several holocellulose/α-cellulose is observed by GPC,which allows us to better observe the changes of various components on the molecular weight.The yield,lignin,whiteness,and molecular weight of the pulps obtained by NaOH treatment were determined.Optical microscope was used to characterize the fiber length-width ratio and rigidity.Finally,the improvement of the fiber rigidity method based on the Kratky-Porod chain model makes it more theoretical and further reveals the influencing factors of fiber rigidity.This study demonstrates the high potentiality of these three species for papermaking applications.展开更多
The analysis of chloroplast gene characteristics in Alpinia japonica(Thunb.)Miq.is of great significance for developing relevant genetic resources.The high-throughput sequencing and bioinformatic research were perform...The analysis of chloroplast gene characteristics in Alpinia japonica(Thunb.)Miq.is of great significance for developing relevant genetic resources.The high-throughput sequencing and bioinformatic research were performed to analyze the chloroplast genome characteristics of A.japonica.The total chloroplast genome length of A.japonica was 161,906 bp,with a typical circular tetrameric structure.And 133 genes were annotated,comprising 87 protein-coding,38 tRNA,and 8 rRNA genes.Furthermore,22 genes contained two copies,and 18 genes owned introns.Repeat sequence analysis showed that it contains 321 simple sequence repeats(SSRs)and 37 long segment repeats.Compared with the chloroplast genomes of eight representative plants in the genus Alpinia,the gene structure,type,and quantity were relatively conservative.Rps12 was the highest variation site in the entire chloroplast gene.A phylogenetic tree showed that the genus Alpinia was the most closely related to the genus Amomum.Meanwhile,A.japonica is the most closely related to Alpinia chinensis belonging to the genus Alpinia.Overall,the chloroplast genome of a new species was reported in the genus Alpinia,and a basis was provided for the utilization of Alpinia plants as a medical resource.展开更多
In this editorial,we comment on a recent publication,which highlights the important findings from the study,including the antitumor and anti-inflammatory effects of isothiocyanates,their underlying mechanisms,and impl...In this editorial,we comment on a recent publication,which highlights the important findings from the study,including the antitumor and anti-inflammatory effects of isothiocyanates,their underlying mechanisms,and implications.Additionally,a related perspective is discussed.展开更多
The new genus Parathrausta gen.n. in the subfamily Spilomelinae (Lepidoptera, Crambidae) is erected based on a series of specimens collected in the Afrotropical region of Saudi Arabia. The new genus is monotypical, wi...The new genus Parathrausta gen.n. in the subfamily Spilomelinae (Lepidoptera, Crambidae) is erected based on a series of specimens collected in the Afrotropical region of Saudi Arabia. The new genus is monotypical, with Parathrausta internervalis sp.n. its type species. The adults of the type species, the male genitalia, the female genitalia and the tympanal organs are described and figured. The new genus is recognized as related by characters in the male and female genitalia with genera in the tribes Steniini Guine, 1854 and Nomophilini Kuznetzov & Stekolnikov, 1979, namely with Bradina Lederer, 1863, Perisyntrocha Meyrick, 1894, Diathrausta Lederer, 1863, Diasemiopsis Munroe, 1957, Diasemiodes Munroe, 1957 and with the genera in the Duponchelia Zeller, 1847 group comprising Duponchelia Zeller, 1847, Penestola Mschler, 1890, Tatobotys Butler, 1880 and Hymenoptychis Zeller, 1852. The character states differentiating the new genus from the comparative genera are discussed. Potential autapomorphies of the new genus are listed. The tribal assignment of the new genus to the Nomophilini Kuznetzov & Stekolnikov, 1979 based on morphological characters is discussed. The support of the tribal and cladistic assignment of the new genus as a sister clade to Diathrausta Lederer, 1863 based phylogenetic analyses (NJ, MP and ML) is shown. An unusually strong genetic divergence of the genus in the COI segment of the mt-DNA based on the Tamura-Nei distance measure from the morphologically related genera is recognized and addressed.展开更多
Anhui musk deer [ Moschus ( moschiferus/berezovskii ) anhuiensis ] has been a taxonomic mystery since its discovery in early 80's.In this paper,with museum samples,we sequenced the complete cytochrome b ge...Anhui musk deer [ Moschus ( moschiferus/berezovskii ) anhuiensis ] has been a taxonomic mystery since its discovery in early 80's.In this paper,with museum samples,we sequenced the complete cytochrome b gene of five Anhui musk deer.When compared with other species in Genus Moschus ,Anhui musk deer showed a rather level of sequence divergence from all the other species in this genus.The phylogenetic trees constructed by multiple methods supported the same topology,in which the monophyly of Anhui musk deer was clearly demonstrated.Therefore,our molecular data suggest a full species status for Anhui musk deer ( Moschus anhuiensis ),rather than a subspecies of either M moschiferus or M berezovskii previously suggested by morphological studies.展开更多
The genus Beipiaoserphus gen. nov. is established and referred to Mesoserphidae with Beipiaoserphus elegans sp. nov. as its type species. The type specimens were collected from the lower part of the Upper Jura...The genus Beipiaoserphus gen. nov. is established and referred to Mesoserphidae with Beipiaoserphus elegans sp. nov. as its type species. The type specimens were collected from the lower part of the Upper Jurassic Yixian Formation at Huangbanjigou Village near Shangyuan Town, Beipiao, Liaoning Province, China and are housed at Nanjing Institute of Geology and Palaeontology, Academia Sinica, Nanjing.展开更多
A new genus, Thelazacallis Zhang (Homoptera: Drepanosiphidae) and a new species, Thelazacallis ranunculicola Qiao et Zhang from China is described with 9 original figures in the present paper. All type specimens a...A new genus, Thelazacallis Zhang (Homoptera: Drepanosiphidae) and a new species, Thelazacallis ranunculicola Qiao et Zhang from China is described with 9 original figures in the present paper. All type specimens are deposited in the Institute of Zoology, Chinese Academy of Sciences.展开更多
A new leaf beetle genus Yulongedon gen. nov., and two new species, Y. formosus sp. nov. and Y. jambhalai sp. nov. from China, are described and illustrated here.
In the present paper, a new species, Placidellus conjugatus, sp. nov. is described from Fujian, China and its types are deposited in the Entomological Museum, Northwest SciTech University of Agriculture and Forestry (...In the present paper, a new species, Placidellus conjugatus, sp. nov. is described from Fujian, China and its types are deposited in the Entomological Museum, Northwest SciTech University of Agriculture and Forestry (NSUAF). One related new genus, Paraplacidellus, gen. nov. with a new species Paraplacidellus maculatus, sp. nov. is described from Sandakan, Borneo, and the holotype of the new species is deposited in the National Museum of Natural History (NMNH).展开更多
A new genus Unilepidotricha gen. nov. is proposed based on the type species U. gracilicurva sp. nov. collected from Yunnan, China. The photographs of the adult and the genitalia as well as the drawings of the wing ven...A new genus Unilepidotricha gen. nov. is proposed based on the type species U. gracilicurva sp. nov. collected from Yunnan, China. The photographs of the adult and the genitalia as well as the drawings of the wing venation are provided.展开更多
Spinarge, gen.nov.with two new species, Spinarge sichuanensis, sp.nov.and S. liui, sp.nov. are described. The new genus is placed in subfamily Athermantinae. A key to the two new species is provided.
文摘According to literary data,there are 189 species of the genus Astragalus that inhabit the territory of Kyrgyzstan.The distribution of species of the genus Astragalus(Fabaceae)was studied by taking into account their occurrence in soil-climatic and relief types of plant habitats in the mountainous territories of Kyrgyzstan.The materials were collected during organized research expeditions to natural areas of plant habitats.The occurrence of species was studied by well-known methods.As a result of such analysis we have made the following conclusions for the first time:in the flora of Kyrgyzstan there are 189 species of the genus Astragalus,they are representatives of 7 subgenera of this genus;species occur in 24 types of plant habitats with soil and relief features,taking into account the altitudinal regularity of taxa distribution in mountain phytocenoses;subgenuses and specific species characterized by broad,smallest and intermediate sizes of habitats were identified;groupings of plant habitat types on the territory of Kyrgyzstan characterized by the largest,smallest and intermediate indicators on the number of subgenuses and species of the genus Astragalus were identified.The botanical description of each species has been supplemented with new information about the species as a taxonomic unit.The materials of our work can be successfully used in the field of systematics,evolution and ecology of plants.
文摘A nowhere-zero k-flow on a graph G=(V(G),E(G))is a pair(D,f),where D is an orientation on E(G)and f:E(G)→{±1,±2,,±(k-1)}is a function such that the total outflow equals to the total inflow at each vertex.This concept was introduced by Tutte as an extension of face colorings,and Tutte in 1954 conjectured that every bridgeless graph admits a nowhere-zero 5-flow,known as the 5-Flow Conjecture.This conjecture is verified for some graph classes and remains unresolved as of today.In this paper,we show that every bridgeless graph of Euler genus at most 20 admits a nowhere-zero 5-flow,which improves several known results.
基金funded by the Special Program for the Major Science and Technology Projects of Yunnan Province,China(Grant No.:202202AE090001).
文摘To ensure the safety and efficacy of Chinese herbs,it is of great significance to conduct rapid quality detection of Chinese herbs at every link of their supply chain.Spectroscopic technology can reflect the overall chemical composition and structural characteristics of Chinese herbs,with the multi-component and multitarget characteristics of Chinese herbs.This review took the genus Paris as an example,and applications of spectroscopic technology with machine learning(ML)in supply chain of the genus Paris from seeds to medicinal materials were introduced.The specific contents included the confirmation of germplasm resources,identification of growth years,cultivar,geographical origin,and original processing and processing methods.The potential application of spectroscopic technology in genus Paris was pointed out,and the prospects of combining spectroscopic technology with blockchain were proposed.The summary and prospects presented in this paper will be beneficial to the quality control of the genus Paris in all links of its supply chain,so as to rationally use the genus Paris resources and ensure the safety and efficacy of medication.
基金funded by the National Science Foundation for Young Scientists of China(No.32001327)the National Key Research and Development Program of China(No.2021YFD2200304-2).
文摘As global warming persistently alters and rapidly reshapes landscapes and habitats, conventional species distribution models relying solely on maintaining static conditions within the current climate are likely to falter, particularly at the genus level. Hence, we hypothesize that climate change will differentially affect ecological niches of the same genus species with various latitudinal positioning and local topography, and the high-latitude species may experience greater niche contraction than low-latitude species, and that mountainous regions with high elevational variability may serve as critical climate refugia. Herein, we simulate niche alterations and integrate an ensemble model(EM) strategy, taking into account species dispersal limitations factors(topography, soil, and ultraviolet), to construct a comprehensive habitat suitability(CHS) model for assessing the future vulnerability of the Betula genus, most of which are timber species in China. Our findings reveal that the niche spatial(geographic distribution) of most species(62%) within the Betula genus will undergo a gradual decline under climate change, supporting our hypothesis of latitudinal differentiation in climate vulnerability. Intriguingly, the projected high-latitude niche reduction within the genus cannot be counterbalanced by the anticipated niche expansion of closely related species in low-latitude regions, even considering the evident latitudinal gradient distribution of species. Nonetheless, the niche spatial of six Betula species in southwestern China remains stable or expands under warming scenarios, strongly supporting our secondary hypothesis about topographic buffering effects, which probably means the unique topography(i.e., the largest elevation difference) of this region may serve as a sanctuary for preserving Betula genetic diversity. Our results underscore the uncertain nature of pre-existing niche systems at the genus level under climate change, emphasizing the need for diligent resource management and conservation planning for vulnerable timber species.
基金the Postdoctoral Science Foundation of China(No.2021 M 703434)the National Natural Science Foundation of China(Nos.32100165,32170205)the Natural Science Foundation of Shanghai(No.21 ZR 144730)。
文摘Based on a combination of morphology and molecular data of ribosomal DNA genes,a new diatom genus Lineaperpetua gen.nov.Yu,You,Kociolek&Wang is described.The features that help define Lineaperpetua at the level of genus include:a tangentially undulated valve face;continuous cribra areolae on the valve interior consisting of pores arranged as strips;single rimoportula located inside the ring of marginal fultoportulae.Additionally,phylogenetic analysis based on nuclear small subunit(SSU)rDNA sequences and nuclear large subunit(LSU)rDNA gene placed the three strains of L.lacustris in a single,monophyletic clade at a considerable sequence distance from the other genera(Thalassiosira,Conticribra,Planktoniella,Shinodiscus,and other genera)belonging to Thalassiosirales.Despite the similarities with some species of Thalassiosira,Conticribra,and Spicaticribra,the suite of features found in Lineaperpetua differentiate it from these other genera.These molecular data and morphological characters suggest an affinity of the new genus to the Thalassiosiraceae.
基金the National Natural Science Foundation of China(Nos.31970213,31870187)the Natural Science Foundation of Heilongjiang Province for Excellent Young Scholars(No.YQ2020C032)the Second Tibetan Plateau Scientific Expedition and Research Program(No.2019QZKK0304)。
文摘During our investigation of diatom biodiversity in Xizang,two species exhibited unique morphological features discriminative from all previously known genera.Herein we describe these two species and describe as new the genus,Spargeria gen.nov.The new genus features narrow to wide rectangular valves,narrow valve mantles,filiform raphe branches that occur on the valve face only,terminal raphe fissures straight or slightly deflected to same side,bow-tie shaped central areas,chambered striae present on the valve face only,being absent from the mantle,wider striae near the axial area and very narrow near the margin,multiseriate striae with small and round areolae that are occluded externally.Comparatively,Spargeria zhuii sp.nov.has larger and robust valves,radiate striae,with one divergent stria near the apices,while Spargeria chenia sp.nov.is smaller,with narrow valves,striae slightly radiate in the middle,becoming convergent or parallel near apices.This new genus belongs to the family Pinnulariaceae,and it was compared and contrasted with other genera of this family.Our work suggests the need for continued studies to document the biodiversity of diatoms in Xizang.
基金The National Key Research and Development Program of China under contract No. 2022YFC3105404the Natural Science Foundation of China under contract Nos 42076114, 41776124the Natural Science Foundation of Xiamen under contract No.3502Z20227173。
文摘The flexed frustules in pennate diatoms are usually associated with monoraphid diatoms. Interestingly, we found a biraphid diatom species with flexed frustules in an offshore intertidal beach environment on Weizhou Island,Beihai City, Guangxi Zhuang Autonomous Region, China. Therefore, based on morphological characteristics, we described a new genus of diatoms Yuzaoea sinensis gen. et sp. nov. CH Li, HH Liu, YH Gao & CP Chen. The frustule of this genus is characterized by heterogeneous frustule with one concave valve and one convex valve,complete raphe on both valves, straight and moderately eccentric raphe, uniseriate striae and girdle bands with a single row of areolae. The most identifying feature of this genus was the flexed frustule, which is rare in biraphid diatoms and common in monoraphid diatoms. We compared the morphometric characteristics of genus Yuzaoea with genus Rhoikoneis and several genera within the family Rhoicospheniaceae, including Rhoicosphenia,Campylopyxis, and Cuneolus. Phylogenetic analyses based on SSU rRNA and rbc L showed that the genus Yuzaoea was the sister group to the clade of Rhoicosphenia with a high support value(bootstrap values = 100%), and the clade “Yuzaoea+Rhoicosphenia” was sister to the clade of monoraphid diatoms, in which the genera Achnanthidium, Planothidium and some Cocconeis with high support values(bootstrap = 100%).Morphologically, the genus Yuzaoea shares many morphological features with monoraphid diatoms like genera Achnanthidium and Planothidium and the members within the Rhoicospheniaceae. Therefore, based on a combined morphological studies and phylogenetic results we suggested that this branch may represented the evolution of one kind monoraphid diatoms, from biraphid diatoms(e.g. genus Yuzaoea), to incompleted biraphid diatoms(e.g. genera Rhoicosphenia, Campylopyxis), to monoraphid diatoms(e.g. genera Achnanthidium and Planothidium).
基金supported by the National Key R&D Program of China(No.2022YFF0904501)Shanghai Rising-Star Program(No.23QA1404100)。
文摘Against the backdrop of a global paper resource shortage,there is a growing need to identify fast-growing tree species capable of producing long-lasting paper.Three plant species namely Broussonetia kazinoki,Broussonetia papyrifera and hybrid paper mulberry,belong to the Broussonetia genus,were collected from China to study their white bark suitability for pulp and papermaking.Their chemical composition revealed that the holocellulose content in Broussonetia kazinoki and Broussonetia papyrifera was more than 80%.The molecular weight distribution of several holocellulose/α-cellulose is observed by GPC,which allows us to better observe the changes of various components on the molecular weight.The yield,lignin,whiteness,and molecular weight of the pulps obtained by NaOH treatment were determined.Optical microscope was used to characterize the fiber length-width ratio and rigidity.Finally,the improvement of the fiber rigidity method based on the Kratky-Porod chain model makes it more theoretical and further reveals the influencing factors of fiber rigidity.This study demonstrates the high potentiality of these three species for papermaking applications.
基金The Natural Science Foundation of China(32060078)the Natural Science Foundation of Jiangxi(20171BAB214024,20202BABL 203044)+4 种基金the Special Program of Science and Technology Cooperation of Jiangxi Provincial Department of Science and Technology(20212BDH81022)The Education Reform Program of Jiangxi Provincial Department of Education(JXJG-22-23-3,JXJG-23-23-5)the“Biology and Medicine”Discipline Construction Project of Nanchang Normal University(100/20149)Jiangxi Province Key Laboratory of Oil Crops Biology(YLKFKT202203)Education Reform Program of Nanchang Normal University(NSJG-21-25).
文摘The analysis of chloroplast gene characteristics in Alpinia japonica(Thunb.)Miq.is of great significance for developing relevant genetic resources.The high-throughput sequencing and bioinformatic research were performed to analyze the chloroplast genome characteristics of A.japonica.The total chloroplast genome length of A.japonica was 161,906 bp,with a typical circular tetrameric structure.And 133 genes were annotated,comprising 87 protein-coding,38 tRNA,and 8 rRNA genes.Furthermore,22 genes contained two copies,and 18 genes owned introns.Repeat sequence analysis showed that it contains 321 simple sequence repeats(SSRs)and 37 long segment repeats.Compared with the chloroplast genomes of eight representative plants in the genus Alpinia,the gene structure,type,and quantity were relatively conservative.Rps12 was the highest variation site in the entire chloroplast gene.A phylogenetic tree showed that the genus Alpinia was the most closely related to the genus Amomum.Meanwhile,A.japonica is the most closely related to Alpinia chinensis belonging to the genus Alpinia.Overall,the chloroplast genome of a new species was reported in the genus Alpinia,and a basis was provided for the utilization of Alpinia plants as a medical resource.
文摘In this editorial,we comment on a recent publication,which highlights the important findings from the study,including the antitumor and anti-inflammatory effects of isothiocyanates,their underlying mechanisms,and implications.Additionally,a related perspective is discussed.
文摘The new genus Parathrausta gen.n. in the subfamily Spilomelinae (Lepidoptera, Crambidae) is erected based on a series of specimens collected in the Afrotropical region of Saudi Arabia. The new genus is monotypical, with Parathrausta internervalis sp.n. its type species. The adults of the type species, the male genitalia, the female genitalia and the tympanal organs are described and figured. The new genus is recognized as related by characters in the male and female genitalia with genera in the tribes Steniini Guine, 1854 and Nomophilini Kuznetzov & Stekolnikov, 1979, namely with Bradina Lederer, 1863, Perisyntrocha Meyrick, 1894, Diathrausta Lederer, 1863, Diasemiopsis Munroe, 1957, Diasemiodes Munroe, 1957 and with the genera in the Duponchelia Zeller, 1847 group comprising Duponchelia Zeller, 1847, Penestola Mschler, 1890, Tatobotys Butler, 1880 and Hymenoptychis Zeller, 1852. The character states differentiating the new genus from the comparative genera are discussed. Potential autapomorphies of the new genus are listed. The tribal assignment of the new genus to the Nomophilini Kuznetzov & Stekolnikov, 1979 based on morphological characters is discussed. The support of the tribal and cladistic assignment of the new genus as a sister clade to Diathrausta Lederer, 1863 based phylogenetic analyses (NJ, MP and ML) is shown. An unusually strong genetic divergence of the genus in the COI segment of the mt-DNA based on the Tamura-Nei distance measure from the morphologically related genera is recognized and addressed.
基金This work received supportsfrom Natural Science Foundation of Yun nan Science Technology Committee granted to SuBingpartlys
文摘Anhui musk deer [ Moschus ( moschiferus/berezovskii ) anhuiensis ] has been a taxonomic mystery since its discovery in early 80's.In this paper,with museum samples,we sequenced the complete cytochrome b gene of five Anhui musk deer.When compared with other species in Genus Moschus ,Anhui musk deer showed a rather level of sequence divergence from all the other species in this genus.The phylogenetic trees constructed by multiple methods supported the same topology,in which the monophyly of Anhui musk deer was clearly demonstrated.Therefore,our molecular data suggest a full species status for Anhui musk deer ( Moschus anhuiensis ),rather than a subspecies of either M moschiferus or M berezovskii previously suggested by morphological studies.
基金Supported by the National Natural Science foundation of China (49832 0 2 0 NIGPAS990 50 2 ) and CMBRP(G2 0 0 0 0 7770 0 )
文摘The genus Beipiaoserphus gen. nov. is established and referred to Mesoserphidae with Beipiaoserphus elegans sp. nov. as its type species. The type specimens were collected from the lower part of the Upper Jurassic Yixian Formation at Huangbanjigou Village near Shangyuan Town, Beipiao, Liaoning Province, China and are housed at Nanjing Institute of Geology and Palaeontology, Academia Sinica, Nanjing.
基金The work was supported by the National Natural Science Foundation of China!(No. 3970 0 0 1 5)
文摘A new genus, Thelazacallis Zhang (Homoptera: Drepanosiphidae) and a new species, Thelazacallis ranunculicola Qiao et Zhang from China is described with 9 original figures in the present paper. All type specimens are deposited in the Institute of Zoology, Chinese Academy of Sciences.
基金supported by a grant from the National Science Foundation of China to Xingke YANG(PI, 31010103913)Siqin GE(PI,30970390)+2 种基金grants from the Key Laboratory of Zoological Systematics and Evolution of the Chinese Academy of Sciences(O529YX5105)the Knowledge Innovation Program of Chinese Academy of Sciences(KSCX3-IOZ-1004)the Chinese National Science Fund for Fostering Talents in Basic Research(Special Subjects in Animal Taxonomy,NSFC-J0630964 /J0109,J0930004)
文摘A new leaf beetle genus Yulongedon gen. nov., and two new species, Y. formosus sp. nov. and Y. jambhalai sp. nov. from China, are described and illustrated here.
基金This study is supported by the National Natural Science Foundation of China( 39870 1 1 3)
文摘In the present paper, a new species, Placidellus conjugatus, sp. nov. is described from Fujian, China and its types are deposited in the Entomological Museum, Northwest SciTech University of Agriculture and Forestry (NSUAF). One related new genus, Paraplacidellus, gen. nov. with a new species Paraplacidellus maculatus, sp. nov. is described from Sandakan, Borneo, and the holotype of the new species is deposited in the National Museum of Natural History (NMNH).
基金The research was supported by the National Natural Science Foundation of China (30670251)
文摘A new genus Unilepidotricha gen. nov. is proposed based on the type species U. gracilicurva sp. nov. collected from Yunnan, China. The photographs of the adult and the genitalia as well as the drawings of the wing venation are provided.
文摘Spinarge, gen.nov.with two new species, Spinarge sichuanensis, sp.nov.and S. liui, sp.nov. are described. The new genus is placed in subfamily Athermantinae. A key to the two new species is provided.
