A novel dammarane-type triterpene oligoglycoside, named ginsenoside-Rg6 3, was isolated from the stem-leaves of Panax ginseng C. A. Mey., together with two known ones, 20(S)-ginsenoside-Rg2 1 and 20(R)-ginsenoside-Rg2...A novel dammarane-type triterpene oligoglycoside, named ginsenoside-Rg6 3, was isolated from the stem-leaves of Panax ginseng C. A. Mey., together with two known ones, 20(S)-ginsenoside-Rg2 1 and 20(R)-ginsenoside-Rg2 2. On the basis of chemical and physicochemical evidence , the structure of ginsenoside-Rg6 have been elucidated as 6-O-(-L-rhamnosyl-(1?2)-(-D-glucopyranosyl-dammarane-(E)-20(22), 24-diene-3(, 6(, 12(-triol.展开更多
[ Objective ] The aim was to select appropriate sterilization methods and explants for tissue culture of Haloxylon ammodendron （ C. A. Mey. ）. [Method] H. ammodendron （C. A. Mey. ） seeds were used as experimental ...[ Objective ] The aim was to select appropriate sterilization methods and explants for tissue culture of Haloxylon ammodendron （ C. A. Mey. ）. [Method] H. ammodendron （C. A. Mey. ） seeds were used as experimental materials to investigate the sterilization results of different sterilization treatments and the effect of different seed sizes on the survival rate of aseptic seedlings. [ Result] Sterilization of H. ammodendron （ C.A. Mey. ） seeds achieved the best result by using 75% alcohol for 15 min and 0.1% mercuric chloride for 8 min. Seeds with diameter φ 〉 2.0 mm were used as explants and achieved relatively high surviv- al rate of aseptic seedlings, which reached above 65%. [ Conclusion] This study established a surface sterilization method for tissue culture of H. ammodendron （ C. A. Mey. ） Bunge seeds.展开更多
A high performance liquid chromatography（HPLC） with UV detection was established for simultaneous determination of saponins in the leaf of Panax ginseng C. A. Mey. Nine ginsenosides（Rbl, Rb2, Rb3, Rc, Rd, F1, F2, F...A high performance liquid chromatography（HPLC） with UV detection was established for simultaneous determination of saponins in the leaf of Panax ginseng C. A. Mey. Nine ginsenosides（Rbl, Rb2, Rb3, Rc, Rd, F1, F2, F3, F5） and notoginsenoside Fe（NFe） were studied. Among the saponins, the ginsenosides F1, F2, F3, F5 and NFe were determined by HPLC-UV method for the first time. The determination of the ginsenosides via the HPLC-UV method was performed on a reversed-phase C18 column with gradient elution in 40 min. The linearity, precision, accuracy, and detection limit for determining the saponins were studied and the samples from different areas in China were analyzed. The HPLC-ESI-MS was used to identify the saponins. The results indicate that the HPLC-UV provided a good accuracy, reproducibility and sensitivity for the determination of the ten saponins.展开更多
The clonal diversity of Clintonia udensis Trautv.et Mey.was detected by ISSR markers among 16 populations,and its correlation with ecological factors was analyzed as well in this work.Results showed that individuals(c...The clonal diversity of Clintonia udensis Trautv.et Mey.was detected by ISSR markers among 16 populations,and its correlation with ecological factors was analyzed as well in this work.Results showed that individuals(clonal ramets)per genotype were 1.12 and 1.149 at population and species levels,respectively,and that the 16 populations were all multiclonal.The detected genotypes were localized,without exception,within populations but demonstrated relatively high clonal differentiation among populations.The clonal diversity of the studied populations was high,with the average Simpson's index of 0.975,while the genets showed a clonal architecture of"guerilla".The population genetic diversities revealed by genet were consistent with those by ramet,further confirming their genetic differentiation among populations.And its genotype diversity within populations probably resulted largely from the frequent seedling regeneration and self-compatibility.In addition,the correlation analysis further revealed that,among the ecological factors,Simpson's index of C.udensis had a significant positive correlation(P<0.05)with pH values in the soil but not others.展开更多
The dry root and rhizome of Panax ginseng C. A. Mey has garnered much interest owing to its medicinal properties against diabetes and cardiovascular diseases. In this study, an ultra-high performance liquid chromatogr...The dry root and rhizome of Panax ginseng C. A. Mey has garnered much interest owing to its medicinal properties against diabetes and cardiovascular diseases. In this study, an ultra-high performance liquid chromatography coupled with quadrupole time-of-flight mass spectrometry (UHPLC-Q-TOF-MS)-based metabolomics approach was used to illustrate the therapeutic mechanisms of ginseng extract on the serum and urinary metabolic profiles in streptozotocin-induced type 1 diabetes mellitus (T1DM) rats. Pharmacological and renal parameters in response to the administration of ginseng were also evaluated. In total, 16 serum endogenous metabolites and 14 urine endogenous metabolites, including pyruvic acid, indoleacetic acid, and phenylacetylglycine, were identified as potential biomarkers for diabetes. Pathway enrichment and network analysis revealed that the biomarkers modulated by ginseng were primarily involved in phenylalanine and pyruvate metabolism, as well as in arginine biosynthesis. Moreover, the levels of several renal injury-related biomarkers in T1DM rats were significantly restored following treatment with ginseng. The administration of the extract helped maintain tissue structure integrity and ameliorated renal injury. The findings suggest that the regulatory effect of ginseng extract on T1DM involves metabolic management of diabetic rats, which subsequently attenuates T1DM-induced early renal dysfunction.展开更多
A new coumarin was obtained from the stems and roots of Wikstroemia indica （L.） C. A. Mey. Its structure was elucidated as methyl 3-（2-hydroxy-4-（7-hydroxy-6-methoxy-2-oxo-2H-chromen-3-yloxy） phenyl） propanoate ...A new coumarin was obtained from the stems and roots of Wikstroemia indica （L.） C. A. Mey. Its structure was elucidated as methyl 3-（2-hydroxy-4-（7-hydroxy-6-methoxy-2-oxo-2H-chromen-3-yloxy） phenyl） propanoate by spectroscopic methods.展开更多
The macrosporogenesis and microsporogenesis, the formation of female and male gametophyte, the process of double fertilization, the development of embryo andendosperm, and the formation of seeds of ginseng (Panax gins...The macrosporogenesis and microsporogenesis, the formation of female and male gametophyte, the process of double fertilization, the development of embryo andendosperm, and the formation of seeds of ginseng (Panax ginseng C. A. Mey.)展开更多
As climate change intensifies,forests increasingly face the challenges posed by more frequent and severe droughts.However,the impacts of drought intensity on post-drought growth recovery and compensatory growth in tre...As climate change intensifies,forests increasingly face the challenges posed by more frequent and severe droughts.However,the impacts of drought intensity on post-drought growth recovery and compensatory growth in trees remain poorly understood.Understanding the mechanisms through which drought influences tree radial growth and accurately assessing how growth responds to different drought intensities is essential for forecasting forest dynamics.In this study,we used correlation analysis to identify the climatic limiting factors for the radial growth of P.schrenkiana Fisch.&C.A.Mey.(P.schrenkiana)across three elevations in the Western Tianshan Mountains of China.We assessed the impact of drought intensity on radial growth.By analyzing the growth resistance,recovery,and resilience of P.schrenkiana in relation to drought intensity,we quantified post-drought growth trajectories.Our key findings are as follows:1)Drought stress is the primary factor limiting the radial growth of P.schrenkiana.2)Tree growth responses vary significantly with elevation and drought intensity.As drought intensity increased,both resistance and recovery decreased.3)Compensatory growth occurred following moderate and severe droughts at all elevations.However,this was not observed in the first year after extreme droughts.These findings highlight the importance of the first post-drought year in determining the recovery trajectory of P.schrenkiana radial growth.展开更多
Introduction The plants of genus Cistanche G. Beck, which belong to Orobanchaceae family, include about twenty species, and there are four species and one variety are distributed in the northwest part of China. The d...Introduction The plants of genus Cistanche G. Beck, which belong to Orobanchaceae family, include about twenty species, and there are four species and one variety are distributed in the northwest part of China. The dried fleshy stem of Cistanche genus plant known as ＇Roucongrong＇ in Chinese traditional medicine, has long been used for kidney deficiency, female infertility, morbid leucorrhea, and neurasthenia. Studies on active components and pharmacological activities show that it possesses significant activities in enhancing potency, anti-fatigue, immuno-modulability, etc, and phenylethanoid glycosides are the major active components. Due to excessive exploitation, its natural resources are facing with exhaustion. In order to improve this situation, the plant has been cultivated on a large scale in the northwest part of China. Up to now, the chemical investigations of the cultivated Cistartcbe salsa have not been undertaken. In this paper we report seven phenylethanoid glycosides from the cultivated Cistanche salsa： echinacoside （1）, cistanoside A （2）, acteoside （3）, isoacteoside （4）, 2＇-acetylacteoside （5）, tubuloside B （6）, and eutigoside A （7）. Among them, compound 7 isolated fronl family Orobanchaceae was reported previously, and compounds 1, 2, 3, 4, 5 and 6 from the cultivated Cistanche salsa are reported for the first time.展开更多
HOX transcription factors and their cofactors,MEINOX,are critical regulators of positional identity and cellular plasticity.While their functions are essential during embryonic development,they also play key roles in ...HOX transcription factors and their cofactors,MEINOX,are critical regulators of positional identity and cellular plasticity.While their functions are essential during embryonic development,they also play key roles in maintaining adult tissue homeostasis.Dysregulation of HOX and MEINOX has been implicated in the pathogenesis of various diseases,including fibrosis and cancer.This review explores the contributions of HOX and MEINOX to dedifferentiation and cellular reprogramming,processes that drive fibrotic disease onset and cancer progression.It also addresses their role in extracellular matrix remodeling in these conditions.Particular attention is given to their involvement in epithelialmesenchymal transition,where altered HOX and MEINOX expression promotes phenotypic plasticity,cancer invasiveness,and fibrotic tissue remodeling.By integrating these perspectives,this review underscores the significance of HOXMEINOX dysregulation and altered positional identity in disease progression.Targeting this dysregulation may offer innovative strategies to modulate epithelial-mesenchymal transition and extracellular matrix dynamics,presenting new therapeutic opportunities for combating fibrosis and cancer.展开更多
The collaborative development of future learning centers in engineering university is a crucial component of integrating education,technology,and talent development.Its essence lies in cultivating top-notch innovative...The collaborative development of future learning centers in engineering university is a crucial component of integrating education,technology,and talent development.Its essence lies in cultivating top-notch innovative engineering talents with both scientific and technological literacy and humanistic feelings for the great rejuvenation of the Chinese nation through a historical narrative and a deep understanding of engineering talent cultivation in China.By tracing back to the formation of educator Mei Yiqi’s engineering intentions,the integration of engineering knowledge,and the history of engineering education governance,this paper proposes the key to the collaborative development of future learning centers in engineering university in the era of artificial intelligence.Firstly,it is necessary to update educational concepts and view learners as dynamically self-empowered individuals with plural existences.Secondly,attention should be paid to dynamic knowledge of possibilities,and cross-subject and interdisciplinary cognition and reflection should be carried out based on the types of engineering knowledge.Thirdly,it is essential to establish an engineering talent cultivation model with problem-guided knowledge learning as the core.With the support of digital network platforms and artificial intelligence technology,an infinite link of ideas and knowledge can be established through comprehensive textual methods,constructing learners’own“infinite library”and a spiritual world that is proactive,creative,and cultural.展开更多
基金The Ninth 5-year Plan" Key Science and Technique R & D Programme Foundation of China (96-901-01-12A).
文摘A novel dammarane-type triterpene oligoglycoside, named ginsenoside-Rg6 3, was isolated from the stem-leaves of Panax ginseng C. A. Mey., together with two known ones, 20(S)-ginsenoside-Rg2 1 and 20(R)-ginsenoside-Rg2 2. On the basis of chemical and physicochemical evidence , the structure of ginsenoside-Rg6 have been elucidated as 6-O-(-L-rhamnosyl-(1?2)-(-D-glucopyranosyl-dammarane-(E)-20(22), 24-diene-3(, 6(, 12(-triol.
基金Supported by Open Project of Key Laboratory of Tarim Animal Husbandry Science and Technology from Xinjiang Production & Construction Crops(HS20901)
文摘[ Objective ] The aim was to select appropriate sterilization methods and explants for tissue culture of Haloxylon ammodendron （ C. A. Mey. ）. [Method] H. ammodendron （C. A. Mey. ） seeds were used as experimental materials to investigate the sterilization results of different sterilization treatments and the effect of different seed sizes on the survival rate of aseptic seedlings. [ Result] Sterilization of H. ammodendron （ C.A. Mey. ） seeds achieved the best result by using 75% alcohol for 15 min and 0.1% mercuric chloride for 8 min. Seeds with diameter φ 〉 2.0 mm were used as explants and achieved relatively high surviv- al rate of aseptic seedlings, which reached above 65%. [ Conclusion] This study established a surface sterilization method for tissue culture of H. ammodendron （ C. A. Mey. ） Bunge seeds.
文摘A high performance liquid chromatography（HPLC） with UV detection was established for simultaneous determination of saponins in the leaf of Panax ginseng C. A. Mey. Nine ginsenosides（Rbl, Rb2, Rb3, Rc, Rd, F1, F2, F3, F5） and notoginsenoside Fe（NFe） were studied. Among the saponins, the ginsenosides F1, F2, F3, F5 and NFe were determined by HPLC-UV method for the first time. The determination of the ginsenosides via the HPLC-UV method was performed on a reversed-phase C18 column with gradient elution in 40 min. The linearity, precision, accuracy, and detection limit for determining the saponins were studied and the samples from different areas in China were analyzed. The HPLC-ESI-MS was used to identify the saponins. The results indicate that the HPLC-UV provided a good accuracy, reproducibility and sensitivity for the determination of the ten saponins.
基金the National Natural Science Foundation of China(Grant No.30670129)Doctoral Fund of the Ministry of Education of China(Grant No.20040697010)Natural Science Foundation of Shaanxi Province(Grant No.2005C117)
文摘The clonal diversity of Clintonia udensis Trautv.et Mey.was detected by ISSR markers among 16 populations,and its correlation with ecological factors was analyzed as well in this work.Results showed that individuals(clonal ramets)per genotype were 1.12 and 1.149 at population and species levels,respectively,and that the 16 populations were all multiclonal.The detected genotypes were localized,without exception,within populations but demonstrated relatively high clonal differentiation among populations.The clonal diversity of the studied populations was high,with the average Simpson's index of 0.975,while the genets showed a clonal architecture of"guerilla".The population genetic diversities revealed by genet were consistent with those by ramet,further confirming their genetic differentiation among populations.And its genotype diversity within populations probably resulted largely from the frequent seedling regeneration and self-compatibility.In addition,the correlation analysis further revealed that,among the ecological factors,Simpson's index of C.udensis had a significant positive correlation(P<0.05)with pH values in the soil but not others.
基金supported by the National Key Research and Development Project(No.2017YFC1702105)Education Department of Jilin Province Project(No.JJKH20201033KJ).
文摘The dry root and rhizome of Panax ginseng C. A. Mey has garnered much interest owing to its medicinal properties against diabetes and cardiovascular diseases. In this study, an ultra-high performance liquid chromatography coupled with quadrupole time-of-flight mass spectrometry (UHPLC-Q-TOF-MS)-based metabolomics approach was used to illustrate the therapeutic mechanisms of ginseng extract on the serum and urinary metabolic profiles in streptozotocin-induced type 1 diabetes mellitus (T1DM) rats. Pharmacological and renal parameters in response to the administration of ginseng were also evaluated. In total, 16 serum endogenous metabolites and 14 urine endogenous metabolites, including pyruvic acid, indoleacetic acid, and phenylacetylglycine, were identified as potential biomarkers for diabetes. Pathway enrichment and network analysis revealed that the biomarkers modulated by ginseng were primarily involved in phenylalanine and pyruvate metabolism, as well as in arginine biosynthesis. Moreover, the levels of several renal injury-related biomarkers in T1DM rats were significantly restored following treatment with ginseng. The administration of the extract helped maintain tissue structure integrity and ameliorated renal injury. The findings suggest that the regulatory effect of ginseng extract on T1DM involves metabolic management of diabetic rats, which subsequently attenuates T1DM-induced early renal dysfunction.
文摘A new coumarin was obtained from the stems and roots of Wikstroemia indica （L.） C. A. Mey. Its structure was elucidated as methyl 3-（2-hydroxy-4-（7-hydroxy-6-methoxy-2-oxo-2H-chromen-3-yloxy） phenyl） propanoate by spectroscopic methods.
文摘The macrosporogenesis and microsporogenesis, the formation of female and male gametophyte, the process of double fertilization, the development of embryo andendosperm, and the formation of seeds of ginseng (Panax ginseng C. A. Mey.)
基金supported by Tianshan Talent Program of Xinjiang(Nos.2022TSYCCX0003 and 2024TSYCCX0041)the National Natural Science Foundation of China(Nos.42375054 and 42375196)+2 种基金the Desert Meteorological Science Research Foundation of China(Nos.Sqj2021018 and Sqj20240018)the Young Meteorological Talent Program of China Meteorological Administration and Youth Innovation Team of China Meteorological Administration(No.CMA2023QN08)the Strategic Priority Research Program of Chinese Academy of Sciences(No.XDA20100306).
文摘As climate change intensifies,forests increasingly face the challenges posed by more frequent and severe droughts.However,the impacts of drought intensity on post-drought growth recovery and compensatory growth in trees remain poorly understood.Understanding the mechanisms through which drought influences tree radial growth and accurately assessing how growth responds to different drought intensities is essential for forecasting forest dynamics.In this study,we used correlation analysis to identify the climatic limiting factors for the radial growth of P.schrenkiana Fisch.&C.A.Mey.(P.schrenkiana)across three elevations in the Western Tianshan Mountains of China.We assessed the impact of drought intensity on radial growth.By analyzing the growth resistance,recovery,and resilience of P.schrenkiana in relation to drought intensity,we quantified post-drought growth trajectories.Our key findings are as follows:1)Drought stress is the primary factor limiting the radial growth of P.schrenkiana.2)Tree growth responses vary significantly with elevation and drought intensity.As drought intensity increased,both resistance and recovery decreased.3)Compensatory growth occurred following moderate and severe droughts at all elevations.However,this was not observed in the first year after extreme droughts.These findings highlight the importance of the first post-drought year in determining the recovery trajectory of P.schrenkiana radial growth.
文摘Introduction The plants of genus Cistanche G. Beck, which belong to Orobanchaceae family, include about twenty species, and there are four species and one variety are distributed in the northwest part of China. The dried fleshy stem of Cistanche genus plant known as ＇Roucongrong＇ in Chinese traditional medicine, has long been used for kidney deficiency, female infertility, morbid leucorrhea, and neurasthenia. Studies on active components and pharmacological activities show that it possesses significant activities in enhancing potency, anti-fatigue, immuno-modulability, etc, and phenylethanoid glycosides are the major active components. Due to excessive exploitation, its natural resources are facing with exhaustion. In order to improve this situation, the plant has been cultivated on a large scale in the northwest part of China. Up to now, the chemical investigations of the cultivated Cistartcbe salsa have not been undertaken. In this paper we report seven phenylethanoid glycosides from the cultivated Cistanche salsa： echinacoside （1）, cistanoside A （2）, acteoside （3）, isoacteoside （4）, 2＇-acetylacteoside （5）, tubuloside B （6）, and eutigoside A （7）. Among them, compound 7 isolated fronl family Orobanchaceae was reported previously, and compounds 1, 2, 3, 4, 5 and 6 from the cultivated Cistanche salsa are reported for the first time.
文摘HOX transcription factors and their cofactors,MEINOX,are critical regulators of positional identity and cellular plasticity.While their functions are essential during embryonic development,they also play key roles in maintaining adult tissue homeostasis.Dysregulation of HOX and MEINOX has been implicated in the pathogenesis of various diseases,including fibrosis and cancer.This review explores the contributions of HOX and MEINOX to dedifferentiation and cellular reprogramming,processes that drive fibrotic disease onset and cancer progression.It also addresses their role in extracellular matrix remodeling in these conditions.Particular attention is given to their involvement in epithelialmesenchymal transition,where altered HOX and MEINOX expression promotes phenotypic plasticity,cancer invasiveness,and fibrotic tissue remodeling.By integrating these perspectives,this review underscores the significance of HOXMEINOX dysregulation and altered positional identity in disease progression.Targeting this dysregulation may offer innovative strategies to modulate epithelial-mesenchymal transition and extracellular matrix dynamics,presenting new therapeutic opportunities for combating fibrosis and cancer.
基金2024 General Research Topic of the Chinese Society of Educational Development Strategy,“Research on the Collaborative Development of‘Future Learning Centers’in Engineering University under New Strategic Needs”(Project No.:ZLB20240820)。
文摘The collaborative development of future learning centers in engineering university is a crucial component of integrating education,technology,and talent development.Its essence lies in cultivating top-notch innovative engineering talents with both scientific and technological literacy and humanistic feelings for the great rejuvenation of the Chinese nation through a historical narrative and a deep understanding of engineering talent cultivation in China.By tracing back to the formation of educator Mei Yiqi’s engineering intentions,the integration of engineering knowledge,and the history of engineering education governance,this paper proposes the key to the collaborative development of future learning centers in engineering university in the era of artificial intelligence.Firstly,it is necessary to update educational concepts and view learners as dynamically self-empowered individuals with plural existences.Secondly,attention should be paid to dynamic knowledge of possibilities,and cross-subject and interdisciplinary cognition and reflection should be carried out based on the types of engineering knowledge.Thirdly,it is essential to establish an engineering talent cultivation model with problem-guided knowledge learning as the core.With the support of digital network platforms and artificial intelligence technology,an infinite link of ideas and knowledge can be established through comprehensive textual methods,constructing learners’own“infinite library”and a spiritual world that is proactive,creative,and cultural.
