Novel nitrogen doped carbon quantum dots were successfully fabricated by a hydrothermal method wxth eggplam sepals as carbon source. The carbon materials were characterized by transmission electron microscopy （TEM）,...Novel nitrogen doped carbon quantum dots were successfully fabricated by a hydrothermal method wxth eggplam sepals as carbon source. The carbon materials were characterized by transmission electron microscopy （TEM）, UV-Vis adsorption, Fourier-transformed infrared spectroscopy （FTIR）, fluorescence and the X-ray photoelectron spectroscopy （XPS） measurements, respectively. The carbon quantum dots showed excellent photoluminescence property with high stability in phosphate buffer solution with different pH values from 5 to 9, even in the cell culture medium supplied with the fetal bovine serum. Meanwhile, we also studied the interaction of carbon quantum dots with living HeLa cells with confocal microscopy. Our results indicated that the carbon quantum dots can enter the living HeLa cells by cellular penetration.展开更多
The cuticle is a crucial barrier on the aerial surfaces of land plants, in many plants, including Arabidopsis, the sepals and petals form distinctive nanoridges in their cuticles. However, little is known about how th...The cuticle is a crucial barrier on the aerial surfaces of land plants, in many plants, including Arabidopsis, the sepals and petals form distinctive nanoridges in their cuticles. However, little is known about how the formation and maintenance of these nanostructures is coordinated with the growth and development of the underlying cells. Here we report the characterization of the Arabidopsis cutin synthase 2 （cus2） mutant, which causes a great reduction in cuticular ridges on the mature sepal epidermis, but only a moderate effect on petal cone cell ridges. Using scanning electron microscopy and confocal live imaging combined with quantification of cellular growth, we find that cuticular ridge formation progresses down the sepal from tip to base as the sepal grows, pCUS2：：GFP-GUS reporter expression coincides with cutic- ular ridge formation, descending the sepal from tip to base. Ridge formation also coincides with the reduction in growth rate and termination of cell division of the underlying epidermal cells. Surprisingly, cuticular ridges at first form normally in the cus2 mutant, but are lost progressively at later stages of sepal development, indicating that CUS2 is crucial for the maintenance of cuticular ridges after they are formed~ Our results reveal the dynamics of both ridge formation and maintenance as the sepal grows.展开更多
[Objective]The aim was to determine the collection standard of cotton ovules on different days before flowering,and then to more clearly study the changes in gene expression of cotton ovules before and after blooming....[Objective]The aim was to determine the collection standard of cotton ovules on different days before flowering,and then to more clearly study the changes in gene expression of cotton ovules before and after blooming.[Method]The standard to distinguish ovules in Xinluzao 13 on different days before flowering was defined by the length and width of alabasterum and sepal.[Result]The alabasterum length increased gradually with approaching of flowering time,while other parameters did not show the same tendency.Therefore,the alabasterum length was chosen as the standard to determine the ovules on different days before flowering.The results of statistics analysis revealed that the alabstrums with length of 1.0-1.2,1.3-1.5 cm and more than 1.7 cm respectively were determined as the standards for ovules collection on 5,3 and 1 d before flowering.[Conclusion]This study will provide not only the reference data for the collection of ovules sample in the following experiment,but also the basis for more precisely detecting the changes in gene expression of ovules before and after flowering.展开更多
Field experiments were carried out on roselle (Hibiscus sabdariffa L) during the 2019 and 2020 cropping seasons at the CSIR-SARI Research Station at Manga in the Upper East Region of Ghana. The aim of the experiment w...Field experiments were carried out on roselle (Hibiscus sabdariffa L) during the 2019 and 2020 cropping seasons at the CSIR-SARI Research Station at Manga in the Upper East Region of Ghana. The aim of the experiment was to study the response of roselle to cowdung, nitrogen fertilizer and their interaction on the growth and yield of roselle. The treatments consisted of factorial combination of five rates of cowdung (0, 1.5, 2.5, 3.5 and 4.5 t/ha) and five levels of nitrogen (0, 20, 40, 60 and 80 kgN/ha) laid out in a randomized complete block design and replicated three times. Data were collected on days to 50% flowering, plant height, number of leaves per plant and dry calyx yield. The results indicated that differences in dry calyx yield due to the manure and nitrogen fertilizer effects were highly significant (P 0.01). Application rate of 2.5 t/ha manure recorded the highest yield of 340 kg/ha and 308.1 kg/ha in 2019 and 2020 respectively. Increasing manure rate from 2.5 - 3.5 t/ha did not result in significant increases in dry calyx yield. The four rates differed significantly from the control which had the least calyx yield of 190.3 kg/ha and 180 kg/ha in 2019 and 2020 respectively. Nitrogen rate of 60 kg/ha recorded the highest dry calyx yield of 510.5 kg/ha and 370.4 kg/ha in 2019 and 2020 respectively which were significantly different from calyx yields recorded by other treatments. The trend on partial budget analysis was consistent in both seasons with the highest yielding treatments (2.5 t/ha cowdung manure and 60 kg/ha) recording the highest net benefit while the control (0 kg/ha) ranked last. The application rate of 2.5 t/ha of cowdung and 60 kg/ha of Nitrogen is thus recommended for optimum roselle production and productivity in the study area.展开更多
Objective To explore the multiple risk factors for family lifestyle of children with congenital heart defects(CHDs)in Shaanxi Province,China.Methods A 1∶1 case-control study was carried out to investigate 60 pairs of...Objective To explore the multiple risk factors for family lifestyle of children with congenital heart defects(CHDs)in Shaanxi Province,China.Methods A 1∶1 case-control study was carried out to investigate 60 pairs of children and their parents.The univariate and multivariable logistic regression models were used to analyze the influence of risk factors related to parents’ lifestyle on CHDs.Results Several possible risk factors were found for CHDs,including fever(OR=4.465,P=0.017),pesticides contact(OR=2.234,P=0.083),passive smoking during pregnancy(OR=20.529,P=0.007)and father’s smoking(OR=3.342,P=0.005);fever(OR=2.428,P=0.012)and passive smoking during pregnancy(OR=1.201,P=0.037)were also correlated with ventricular sepal defect(VSD).Conclusion Fever,pesticides contact and passive smoking are associated with CHDs during pregnancy.We should focus our attention on health care during pregnancy to avoid the above-mentioned risk factors and call on parents to hold on to a good healthy lifestyle.展开更多
Plants of the Caprifoliaceae family are widely cultivated worldwide as ornamental plants owing to their numerous,sweet-smelling,beautiful flowers and fruits.Heptacodium miconioides Rehd.,a member of the family,is ende...Plants of the Caprifoliaceae family are widely cultivated worldwide as ornamental plants owing to their numerous,sweet-smelling,beautiful flowers and fruits.Heptacodium miconioides Rehd.,a member of the family,is endemic to eastern China and is cultivated as a popular ornamental plant in North America and European countries.It has a rather novel and beautiful trait of high horticultural value,that is,its sepals persist and enlarge,turning purplish red.Here,we report the chromosome-level genome assembly of H.miconioides to understand its evolution and floral characteristics.The 622.28 Mb assembled genome harbored a shared whole-genome duplication with a related species,Lonicera japonica.Comparative genomic analysis suggested that chromosome fission events following genome duplication underlie the unusual chromosome number of these two species,as well as chromosome fission of another five chromosomes in H.miconioides,giving rise to a haploid chromosome number of 14(versus 9 in L.japonica).In addition,based on transcriptome and chloroplast genome analysis of 17 representative species in the Caprifoliaceae,we assumed that large structural variations in the chromosomes of H.miconioides were not caused by hybridization.Changes in the candidate genes of the MADS-box family were detected in the H.miconioides genome,including AP1-,AP3-,and SEPexpanded,which might underlie the sepal elongation and development in this species.The current findings provided a critical resource for genome evolution studies in Caprifoliaceae and it was an example of how multi-omics data can elucidate the regulation of important ornamental traits.展开更多
基金supported by the National Science Foundation for Excellent Young Scholar of China(21322510)the Natural Science Foundation of Jilin Province(201215092)the President Funds of the Chinese Academy of Sciences
文摘Novel nitrogen doped carbon quantum dots were successfully fabricated by a hydrothermal method wxth eggplam sepals as carbon source. The carbon materials were characterized by transmission electron microscopy （TEM）, UV-Vis adsorption, Fourier-transformed infrared spectroscopy （FTIR）, fluorescence and the X-ray photoelectron spectroscopy （XPS） measurements, respectively. The carbon quantum dots showed excellent photoluminescence property with high stability in phosphate buffer solution with different pH values from 5 to 9, even in the cell culture medium supplied with the fetal bovine serum. Meanwhile, we also studied the interaction of carbon quantum dots with living HeLa cells with confocal microscopy. Our results indicated that the carbon quantum dots can enter the living HeLa cells by cellular penetration.
文摘The cuticle is a crucial barrier on the aerial surfaces of land plants, in many plants, including Arabidopsis, the sepals and petals form distinctive nanoridges in their cuticles. However, little is known about how the formation and maintenance of these nanostructures is coordinated with the growth and development of the underlying cells. Here we report the characterization of the Arabidopsis cutin synthase 2 （cus2） mutant, which causes a great reduction in cuticular ridges on the mature sepal epidermis, but only a moderate effect on petal cone cell ridges. Using scanning electron microscopy and confocal live imaging combined with quantification of cellular growth, we find that cuticular ridge formation progresses down the sepal from tip to base as the sepal grows, pCUS2：：GFP-GUS reporter expression coincides with cutic- ular ridge formation, descending the sepal from tip to base. Ridge formation also coincides with the reduction in growth rate and termination of cell division of the underlying epidermal cells. Surprisingly, cuticular ridges at first form normally in the cus2 mutant, but are lost progressively at later stages of sepal development, indicating that CUS2 is crucial for the maintenance of cuticular ridges after they are formed~ Our results reveal the dynamics of both ridge formation and maintenance as the sepal grows.
基金Supported by Key Project of 973Program(2004CB117307)Special Transgenic Fund in Department of Agriculture(2009ZX08005-027B)Doctor's Foundation in Corps(2007JC08)~~
文摘[Objective]The aim was to determine the collection standard of cotton ovules on different days before flowering,and then to more clearly study the changes in gene expression of cotton ovules before and after blooming.[Method]The standard to distinguish ovules in Xinluzao 13 on different days before flowering was defined by the length and width of alabasterum and sepal.[Result]The alabasterum length increased gradually with approaching of flowering time,while other parameters did not show the same tendency.Therefore,the alabasterum length was chosen as the standard to determine the ovules on different days before flowering.The results of statistics analysis revealed that the alabstrums with length of 1.0-1.2,1.3-1.5 cm and more than 1.7 cm respectively were determined as the standards for ovules collection on 5,3 and 1 d before flowering.[Conclusion]This study will provide not only the reference data for the collection of ovules sample in the following experiment,but also the basis for more precisely detecting the changes in gene expression of ovules before and after flowering.
文摘Field experiments were carried out on roselle (Hibiscus sabdariffa L) during the 2019 and 2020 cropping seasons at the CSIR-SARI Research Station at Manga in the Upper East Region of Ghana. The aim of the experiment was to study the response of roselle to cowdung, nitrogen fertilizer and their interaction on the growth and yield of roselle. The treatments consisted of factorial combination of five rates of cowdung (0, 1.5, 2.5, 3.5 and 4.5 t/ha) and five levels of nitrogen (0, 20, 40, 60 and 80 kgN/ha) laid out in a randomized complete block design and replicated three times. Data were collected on days to 50% flowering, plant height, number of leaves per plant and dry calyx yield. The results indicated that differences in dry calyx yield due to the manure and nitrogen fertilizer effects were highly significant (P 0.01). Application rate of 2.5 t/ha manure recorded the highest yield of 340 kg/ha and 308.1 kg/ha in 2019 and 2020 respectively. Increasing manure rate from 2.5 - 3.5 t/ha did not result in significant increases in dry calyx yield. The four rates differed significantly from the control which had the least calyx yield of 190.3 kg/ha and 180 kg/ha in 2019 and 2020 respectively. Nitrogen rate of 60 kg/ha recorded the highest dry calyx yield of 510.5 kg/ha and 370.4 kg/ha in 2019 and 2020 respectively which were significantly different from calyx yields recorded by other treatments. The trend on partial budget analysis was consistent in both seasons with the highest yielding treatments (2.5 t/ha cowdung manure and 60 kg/ha) recording the highest net benefit while the control (0 kg/ha) ranked last. The application rate of 2.5 t/ha of cowdung and 60 kg/ha of Nitrogen is thus recommended for optimum roselle production and productivity in the study area.
基金supported by the Tackling Project for Social Development of Committee of Science and Technology of Shaanxi Province(2003K10-G83)
文摘Objective To explore the multiple risk factors for family lifestyle of children with congenital heart defects(CHDs)in Shaanxi Province,China.Methods A 1∶1 case-control study was carried out to investigate 60 pairs of children and their parents.The univariate and multivariable logistic regression models were used to analyze the influence of risk factors related to parents’ lifestyle on CHDs.Results Several possible risk factors were found for CHDs,including fever(OR=4.465,P=0.017),pesticides contact(OR=2.234,P=0.083),passive smoking during pregnancy(OR=20.529,P=0.007)and father’s smoking(OR=3.342,P=0.005);fever(OR=2.428,P=0.012)and passive smoking during pregnancy(OR=1.201,P=0.037)were also correlated with ventricular sepal defect(VSD).Conclusion Fever,pesticides contact and passive smoking are associated with CHDs during pregnancy.We should focus our attention on health care during pregnancy to avoid the above-mentioned risk factors and call on parents to hold on to a good healthy lifestyle.
基金supported by grants from the Zhejiang Provincial Natural Science Foundation of China(Grant No.LTY22C030002)the National Natural Science Foundation of China(Grant No.32001113)the Zhejiang Provincial Natural Science Foundation of China(Grant No.LQ19C030001)。
文摘Plants of the Caprifoliaceae family are widely cultivated worldwide as ornamental plants owing to their numerous,sweet-smelling,beautiful flowers and fruits.Heptacodium miconioides Rehd.,a member of the family,is endemic to eastern China and is cultivated as a popular ornamental plant in North America and European countries.It has a rather novel and beautiful trait of high horticultural value,that is,its sepals persist and enlarge,turning purplish red.Here,we report the chromosome-level genome assembly of H.miconioides to understand its evolution and floral characteristics.The 622.28 Mb assembled genome harbored a shared whole-genome duplication with a related species,Lonicera japonica.Comparative genomic analysis suggested that chromosome fission events following genome duplication underlie the unusual chromosome number of these two species,as well as chromosome fission of another five chromosomes in H.miconioides,giving rise to a haploid chromosome number of 14(versus 9 in L.japonica).In addition,based on transcriptome and chloroplast genome analysis of 17 representative species in the Caprifoliaceae,we assumed that large structural variations in the chromosomes of H.miconioides were not caused by hybridization.Changes in the candidate genes of the MADS-box family were detected in the H.miconioides genome,including AP1-,AP3-,and SEPexpanded,which might underlie the sepal elongation and development in this species.The current findings provided a critical resource for genome evolution studies in Caprifoliaceae and it was an example of how multi-omics data can elucidate the regulation of important ornamental traits.
