[Objective] The aim of this study was to investigate the content changes and their correlations of the photosynthetic pigment,phenols,including total phenols,total flavonoids and anthocyanins,and total saponins of the...[Objective] The aim of this study was to investigate the content changes and their correlations of the photosynthetic pigment,phenols,including total phenols,total flavonoids and anthocyanins,and total saponins of the one-year-old P.notoginseng plants under supplemental UV-B stress in fields.[Method] The one-year-old plants were irradiated by UV-B in field for 1 min per day,and the plants under the UV-B lamp were regarded as a circle center,achieving an annular leaf-sampling.The photosynthetic pigment,phenols and total saponins of the leaves were determined spectrophotometrically.[Result] With the increase of sampling radius,the supplemental UV-B intensity decreased significantly,the contents of chlorophyll （Chl） a,Chl b,Chl （a＋b）,carotenoid （Car） and total photosynthetic pigment （Chl＋Car） of the leaves increased extremely significantly,the Chl a/b and total phenol content （TPC） decreased extremely significantly,but the Chl （a＋b）/Car changes were not significant.The contents of total flavonoids,anthocyanins and saponins all increased due to the increasing of UV-B,displaying dose effects.The UV-B intensity was positively correlated with the Chl a/b,and negatively with the Chl a,Chl b,Chl （a＋ b）,Car and （Chl＋Car） contents; and the two of TPC,total flavonoid content （TFC）,total anthocyanin content （TAC） and total saponin content （TSC） were positively correlated,all reaching extremely significant level.The UV-B intensity was positively and significantly correlated with the total flavonoid content （TFC）,negatively and significantly with the Chl （a＋b）/Car,and positively and insignificantly with the TPC,TAC and TSC.[Conclusion] For one-year-old plants of P.notoginseng,UV-B can decrease the contents of the Chl a,Chl b,Chl （a＋b）,Car and （Chl＋Car） and increase the Chl a/b and TPC,and,furthermore,induce the increases of the TFC,TAC and TSC in a dose-dependent manner.However,UV-B can hardly change the Chl （a＋b）/Car.The supplemental UV-B of well-suited dose might be one of the effective measures to improve the TSC of P.notoginseng.展开更多
[Objectives]To determine the content of total saponins in Paris daliensis H. Li et V. G. Soukoup and Paris dulongensis H. Li et S.kurita,fill the gap in the study of Paris daliensis H. Li et V. G. Soukoup and Paris du...[Objectives]To determine the content of total saponins in Paris daliensis H. Li et V. G. Soukoup and Paris dulongensis H. Li et S.kurita,fill the gap in the study of Paris daliensis H. Li et V. G. Soukoup and Paris dulongensis H. Li et S. kurita,and lay a foundation for searching new medicinal resources of Paris L. [Methods]The perchloric acid colorimetric method and UV spectrophotometer were used to determine the content of total saponins in Paris daliensis H. Li et V. G. Soukoup and Paris dulongensis H. Li et S. kurita at 406 nm. [Results]The lowest content of total saponins in Paris daliensis H. Li et V. G. Soukoup was 2. 637%,while the highest content reached 5. 474%; the lowest content of total saponins in Paris dulongensis was 1. 806%,while the highest content reached 3. 532%. Through the methodological examination,it was found that this method was stable and reliable. [Conclusions] The content of total saponins was high in Paris daliensis H.Li et V. G. Soukoup and Paris dulongensis H. Li et S. kurita,and it was suggested to further study and find the medicinal resources of Paris L.展开更多
运用紫外-可见分光光度法测定4个产区药用植物太子参(Pseudostellaria heterophylla(Miq.)Pax ex Pax et Hoffm.)中的太子参皂苷含量,并分析太子参皂苷含量的地理变异规律,及其与气候因子在不同时间尺度上的响应关系。结果显示,太子参...运用紫外-可见分光光度法测定4个产区药用植物太子参(Pseudostellaria heterophylla(Miq.)Pax ex Pax et Hoffm.)中的太子参皂苷含量,并分析太子参皂苷含量的地理变异规律,及其与气候因子在不同时间尺度上的响应关系。结果显示,太子参皂苷含量可分为江苏-安徽高含量区和贵州-福建低含量区。太子参皂苷含量与年均日照量呈极显著正相关,与年均相对湿度和年均降水呈负相关;与最热月份最高温呈显著正相关,与最冷季度平均温呈显著负相关。月均日照量和月均温对太子参皂苷含量影响较大,其中1-12月的月均日照量与太子参皂苷含量呈显著正相关;1-4月和11-12月的月均温与太子参皂苷含量呈负相关;5-9月的月均温与太子参皂苷含量呈正相关。产区间日照量差异可能是造成太子参皂苷含量地理变异的主要气候因素,日照量高、季度间温度差异大且相对少雨、低湿的地区有助于太子参皂苷的形成和积累。展开更多
目的建立一种基于近红外光谱技术快速测定文山三七4种品质指标的方法。方法采用GB/T19086—2008《地理标志产品-文山三七》中规定的方法测定文山三七的水分、总灰分、酸不溶性灰分以及皂苷的含量,建立标杆数据。采集文山三七样品的近红...目的建立一种基于近红外光谱技术快速测定文山三七4种品质指标的方法。方法采用GB/T19086—2008《地理标志产品-文山三七》中规定的方法测定文山三七的水分、总灰分、酸不溶性灰分以及皂苷的含量,建立标杆数据。采集文山三七样品的近红外光谱数据,利用偏最小二乘回归(partial least squares regression,PLSR)方法建立模型。通过优化光谱预处理方法和变量筛选方法进一步提升模型的预测能力。结果文山三七水分、总灰分、酸不溶性灰分以及皂苷的校正集相关系数(Rc)分别为0.9891、0.9703、0.9803、0.9462,预测集相关系数(Rp)分别为0.9867、0.9678、0.9691、0.8122,预测集均方根误差(root mean square error of prediction,RMSEP)分别为0.1875、0.1405、0.0662、0.6574,性能偏差比(ratio of performance to deviation,RPD)分别为3.814、3.2300、3.9183、1.7641。结论本方法可以快速、准确地测定文山三七中4种关键品质指标,为文山三七的质量控制提供了一种快速有效的检测方法。展开更多
基金Supported by the National Natural Science Foundation of China(31060045,31260091)~~
文摘[Objective] The aim of this study was to investigate the content changes and their correlations of the photosynthetic pigment,phenols,including total phenols,total flavonoids and anthocyanins,and total saponins of the one-year-old P.notoginseng plants under supplemental UV-B stress in fields.[Method] The one-year-old plants were irradiated by UV-B in field for 1 min per day,and the plants under the UV-B lamp were regarded as a circle center,achieving an annular leaf-sampling.The photosynthetic pigment,phenols and total saponins of the leaves were determined spectrophotometrically.[Result] With the increase of sampling radius,the supplemental UV-B intensity decreased significantly,the contents of chlorophyll （Chl） a,Chl b,Chl （a＋b）,carotenoid （Car） and total photosynthetic pigment （Chl＋Car） of the leaves increased extremely significantly,the Chl a/b and total phenol content （TPC） decreased extremely significantly,but the Chl （a＋b）/Car changes were not significant.The contents of total flavonoids,anthocyanins and saponins all increased due to the increasing of UV-B,displaying dose effects.The UV-B intensity was positively correlated with the Chl a/b,and negatively with the Chl a,Chl b,Chl （a＋ b）,Car and （Chl＋Car） contents; and the two of TPC,total flavonoid content （TFC）,total anthocyanin content （TAC） and total saponin content （TSC） were positively correlated,all reaching extremely significant level.The UV-B intensity was positively and significantly correlated with the total flavonoid content （TFC）,negatively and significantly with the Chl （a＋b）/Car,and positively and insignificantly with the TPC,TAC and TSC.[Conclusion] For one-year-old plants of P.notoginseng,UV-B can decrease the contents of the Chl a,Chl b,Chl （a＋b）,Car and （Chl＋Car） and increase the Chl a/b and TPC,and,furthermore,induce the increases of the TFC,TAC and TSC in a dose-dependent manner.However,UV-B can hardly change the Chl （a＋b）/Car.The supplemental UV-B of well-suited dose might be one of the effective measures to improve the TSC of P.notoginseng.
基金Supported by Sichuan Science and Technology Support Program(2016FZ-0045)Education and Teaching Research and Reform Project of Southwest University for Nationalities(2015)
文摘[Objectives]To determine the content of total saponins in Paris daliensis H. Li et V. G. Soukoup and Paris dulongensis H. Li et S.kurita,fill the gap in the study of Paris daliensis H. Li et V. G. Soukoup and Paris dulongensis H. Li et S. kurita,and lay a foundation for searching new medicinal resources of Paris L. [Methods]The perchloric acid colorimetric method and UV spectrophotometer were used to determine the content of total saponins in Paris daliensis H. Li et V. G. Soukoup and Paris dulongensis H. Li et S. kurita at 406 nm. [Results]The lowest content of total saponins in Paris daliensis H. Li et V. G. Soukoup was 2. 637%,while the highest content reached 5. 474%; the lowest content of total saponins in Paris dulongensis was 1. 806%,while the highest content reached 3. 532%. Through the methodological examination,it was found that this method was stable and reliable. [Conclusions] The content of total saponins was high in Paris daliensis H.Li et V. G. Soukoup and Paris dulongensis H. Li et S. kurita,and it was suggested to further study and find the medicinal resources of Paris L.
文摘运用紫外-可见分光光度法测定4个产区药用植物太子参(Pseudostellaria heterophylla(Miq.)Pax ex Pax et Hoffm.)中的太子参皂苷含量,并分析太子参皂苷含量的地理变异规律,及其与气候因子在不同时间尺度上的响应关系。结果显示,太子参皂苷含量可分为江苏-安徽高含量区和贵州-福建低含量区。太子参皂苷含量与年均日照量呈极显著正相关,与年均相对湿度和年均降水呈负相关;与最热月份最高温呈显著正相关,与最冷季度平均温呈显著负相关。月均日照量和月均温对太子参皂苷含量影响较大,其中1-12月的月均日照量与太子参皂苷含量呈显著正相关;1-4月和11-12月的月均温与太子参皂苷含量呈负相关;5-9月的月均温与太子参皂苷含量呈正相关。产区间日照量差异可能是造成太子参皂苷含量地理变异的主要气候因素,日照量高、季度间温度差异大且相对少雨、低湿的地区有助于太子参皂苷的形成和积累。
文摘目的建立一种基于近红外光谱技术快速测定文山三七4种品质指标的方法。方法采用GB/T19086—2008《地理标志产品-文山三七》中规定的方法测定文山三七的水分、总灰分、酸不溶性灰分以及皂苷的含量,建立标杆数据。采集文山三七样品的近红外光谱数据,利用偏最小二乘回归(partial least squares regression,PLSR)方法建立模型。通过优化光谱预处理方法和变量筛选方法进一步提升模型的预测能力。结果文山三七水分、总灰分、酸不溶性灰分以及皂苷的校正集相关系数(Rc)分别为0.9891、0.9703、0.9803、0.9462,预测集相关系数(Rp)分别为0.9867、0.9678、0.9691、0.8122,预测集均方根误差(root mean square error of prediction,RMSEP)分别为0.1875、0.1405、0.0662、0.6574,性能偏差比(ratio of performance to deviation,RPD)分别为3.814、3.2300、3.9183、1.7641。结论本方法可以快速、准确地测定文山三七中4种关键品质指标,为文山三七的质量控制提供了一种快速有效的检测方法。
