Global warming will affect growth strategies and how trees will adapt.To compare the response of tree radial growth to climate warming in different slope directions,samples of Pinus armandii Franch were collected and ...Global warming will affect growth strategies and how trees will adapt.To compare the response of tree radial growth to climate warming in different slope directions,samples of Pinus armandii Franch were collected and treering chronologies developed on northern and western slopes from the Lubanling in the Funiu Mountains.Correlation analyses showed that two chronologies were mainly limited by temperatures in the previous June–August and the combination of temperatures and moisture in the current May–July.The difference of the climate response to slopes was small but not negligible.Radial growth of the LBL01 site on the northern slope was affected by the combined maximum and minimum temperatures,while that of the LBL02 site was affected by maximum temperatures.With regards to moisture,radial growth of the trees on the north slope was influenced by the relative humidity in the current May–July,while on the western slope,it was affected by the relative humidity in the previous June–August,the current May–July and the precipitation in the current May–July.With the change in climate,the effects of the main limiting factors on growth on different slopes were visible to a certain extent,but the differences in response of trees on different slopes gradually decreased,which might be caused by factors such as different slope directions and the change in diurnal temperature range.These results may provide information for forest protection and ecological construction in this region,and a scientific reference for future climate reconstruction.展开更多
[ Objective] The difference of mineral element content in healthy bark of P. armandii and bark affected by C. nbicola were compared, which would provide theoretical foundation for exploring new ways to control the dis...[ Objective] The difference of mineral element content in healthy bark of P. armandii and bark affected by C. nbicola were compared, which would provide theoretical foundation for exploring new ways to control the disease by artificial water and fertilizer. [ Method] Inductively Coupled Plasma Optical Emission Spectrometer（ ICP-OES）was adopted to measure the variation of mineral elements content in bark after P. armandii was affected by C. nbicola. [Result] 45 mineral elements in the healthy bark and 46 mineral elements in affected bark caused by C. ribicola were detected. These mineral elements contained 14 kinds of mineral elements which were necessary for plant growth and 31 kinds of other mineral elements （32 kinds after affected disease）. The total content of mineral elements in affected bark of P. armandii decreased for 15.77%, in which necessary elements for plant growth decreased for 15.54% and other elements decreased for 17.07%. The content of Ca decreased the most, decrease rate was about 75%. The order of content was also changed, they were Na 〉 Ca 〉 B 〉 K 〉 Si 〉 Mg 〉 S 〉 P in healthy bark, and Na 〉 B 〉 K 〉 Ca 〉 Mg 〉 P 〉 Si 〉 S in affected bark. [ Conclusion] The results laid foundation for controlling C. ribicola through application of mineral elements.展开更多
目的对重楼属药用植物狭叶重楼(Paris.polyphylla.Smith var stenophylla Franch)的化学成分进行研究,为拓宽重楼属药用植物的资源提供科学依据。方法采用硅胶柱层析,大孔吸附树脂,葡聚糖凝胶SephadexLH-20及反相硅胶RP-C18中压液相柱...目的对重楼属药用植物狭叶重楼(Paris.polyphylla.Smith var stenophylla Franch)的化学成分进行研究,为拓宽重楼属药用植物的资源提供科学依据。方法采用硅胶柱层析,大孔吸附树脂,葡聚糖凝胶SephadexLH-20及反相硅胶RP-C18中压液相柱层析等技术分离纯化其主要化合物,根据理化性质、波谱数据鉴定其结构。结果从狭叶重楼乙醇提取物中分离并鉴定了5个甾体皂苷类单体化合物:重楼皂苷:Diosgenin-3-O-α-L-rhamnopyranosyl-(l→2)-[α-L-arabinofuranosyl-(1→4)]-β-D-glucopyranoside;重楼皂苷V:Diosgenin-3-O-α-L-rhamnopyranosyl-(l→2)-β-D-glucopyranoside;重楼皂苷:Pennogenin-3-O-α-L-rhamnopyranosyl(1→2)-β-D-glu-copyranoside;重楼皂苷:Pennogenin-3-O-α-L-rhamnopyranosyl-(1→4)-α-L-rhamnopyranosyl-(1→4)-[α-L-rhamnopyranosyl-(l→2)]-β-D-glucopyranoside;重楼皂苷H:Pennoge-nin-3-O-α-L-rhamnopyranosyl-(l→2)-[α-L-arabinofuranosyl-(1→4)]-β-D-Glucopyranoside。结论首次从狭叶重楼中分离并鉴定出5个甾体皂苷类化合物。展开更多
基金the National Natural Science Foundation of China(No.4207741741671042)。
文摘Global warming will affect growth strategies and how trees will adapt.To compare the response of tree radial growth to climate warming in different slope directions,samples of Pinus armandii Franch were collected and treering chronologies developed on northern and western slopes from the Lubanling in the Funiu Mountains.Correlation analyses showed that two chronologies were mainly limited by temperatures in the previous June–August and the combination of temperatures and moisture in the current May–July.The difference of the climate response to slopes was small but not negligible.Radial growth of the LBL01 site on the northern slope was affected by the combined maximum and minimum temperatures,while that of the LBL02 site was affected by maximum temperatures.With regards to moisture,radial growth of the trees on the north slope was influenced by the relative humidity in the current May–July,while on the western slope,it was affected by the relative humidity in the previous June–August,the current May–July and the precipitation in the current May–July.With the change in climate,the effects of the main limiting factors on growth on different slopes were visible to a certain extent,but the differences in response of trees on different slopes gradually decreased,which might be caused by factors such as different slope directions and the change in diurnal temperature range.These results may provide information for forest protection and ecological construction in this region,and a scientific reference for future climate reconstruction.
基金Supported by The 10~(th) Five-Years Key Programs for Science and Technology Development of Yunnan Province(2003NG12)~~
文摘[ Objective] The difference of mineral element content in healthy bark of P. armandii and bark affected by C. nbicola were compared, which would provide theoretical foundation for exploring new ways to control the disease by artificial water and fertilizer. [ Method] Inductively Coupled Plasma Optical Emission Spectrometer（ ICP-OES）was adopted to measure the variation of mineral elements content in bark after P. armandii was affected by C. nbicola. [Result] 45 mineral elements in the healthy bark and 46 mineral elements in affected bark caused by C. ribicola were detected. These mineral elements contained 14 kinds of mineral elements which were necessary for plant growth and 31 kinds of other mineral elements （32 kinds after affected disease）. The total content of mineral elements in affected bark of P. armandii decreased for 15.77%, in which necessary elements for plant growth decreased for 15.54% and other elements decreased for 17.07%. The content of Ca decreased the most, decrease rate was about 75%. The order of content was also changed, they were Na 〉 Ca 〉 B 〉 K 〉 Si 〉 Mg 〉 S 〉 P in healthy bark, and Na 〉 B 〉 K 〉 Ca 〉 Mg 〉 P 〉 Si 〉 S in affected bark. [ Conclusion] The results laid foundation for controlling C. ribicola through application of mineral elements.
文摘目的对重楼属药用植物狭叶重楼(Paris.polyphylla.Smith var stenophylla Franch)的化学成分进行研究,为拓宽重楼属药用植物的资源提供科学依据。方法采用硅胶柱层析,大孔吸附树脂,葡聚糖凝胶SephadexLH-20及反相硅胶RP-C18中压液相柱层析等技术分离纯化其主要化合物,根据理化性质、波谱数据鉴定其结构。结果从狭叶重楼乙醇提取物中分离并鉴定了5个甾体皂苷类单体化合物:重楼皂苷:Diosgenin-3-O-α-L-rhamnopyranosyl-(l→2)-[α-L-arabinofuranosyl-(1→4)]-β-D-glucopyranoside;重楼皂苷V:Diosgenin-3-O-α-L-rhamnopyranosyl-(l→2)-β-D-glucopyranoside;重楼皂苷:Pennogenin-3-O-α-L-rhamnopyranosyl(1→2)-β-D-glu-copyranoside;重楼皂苷:Pennogenin-3-O-α-L-rhamnopyranosyl-(1→4)-α-L-rhamnopyranosyl-(1→4)-[α-L-rhamnopyranosyl-(l→2)]-β-D-glucopyranoside;重楼皂苷H:Pennoge-nin-3-O-α-L-rhamnopyranosyl-(l→2)-[α-L-arabinofuranosyl-(1→4)]-β-D-Glucopyranoside。结论首次从狭叶重楼中分离并鉴定出5个甾体皂苷类化合物。
