Plant biomarkers, such as hydrocarbon waxes, are frequently found in various sediments and could be adopted as paleovegetation and paleoclimate indicators. Nevertheless, scarce researches have focused on leaf waxes in...Plant biomarkers, such as hydrocarbon waxes, are frequently found in various sediments and could be adopted as paleovegetation and paleoclimate indicators. Nevertheless, scarce researches have focused on leaf waxes in higher plants of alpine region.Herein, hydrocarbon leaf wax components of Salix oritrepha, which flourish in Nianbaoyeze Mountains in eastern Tibetan Plateau were fully discussed. The n-alkane distribution in leaves ranges from n-C_(21) to nC_(29) with maxima at n-C_(25), which were entirely different with Salix taxa displayed in previous surveys in non-alpine regions. The unusual even carbon nalkenes from n-C_(22:1) to n-C_(30:1), which were thought to appear only in aquatic organisms, were firstly reported in an alpine plant. Additionally, iso-(2-methyl) alkanes, ranging from i-C_(23) to i-C_(29) with maxima at i-C_(25), which have been commonly reported in microorganisms, were also identified in an alpine plant for the first time. Unusual hydrocarbon distribution detected in Salix oritrepha leaf from Nianbaoyeze Mountains is most likely due to the extreme environment in such alpine region.展开更多
用高效液相色谱法测定山生柳中水杨苷、水杨酰水杨苷和木犀草素 7 O 葡萄糖苷的含量.流动相为1.5%醋酸溶液 甲醇,SymmetryC18柱,柱温30℃,流速1.1mL/min,检测波长270nm.线性浓度范围分别为527.0～105.4μg/mL,140.0～28.0μg/mL,81.0～1...用高效液相色谱法测定山生柳中水杨苷、水杨酰水杨苷和木犀草素 7 O 葡萄糖苷的含量.流动相为1.5%醋酸溶液 甲醇,SymmetryC18柱,柱温30℃,流速1.1mL/min,检测波长270nm.线性浓度范围分别为527.0～105.4μg/mL,140.0～28.0μg/mL,81.0～16.2μg/mL,平均回收率是104.9%、104.6%和103.6%,RSD分别为2.0%、0.3%和0.3%.展开更多
基金supported by the National Natural Science Foundation of China (Grant Nos. 41301224, 41601195)Jiangsu Overseas Research & Training Program for University Prominent Young & Middle-aged Teachers and Presidents
文摘Plant biomarkers, such as hydrocarbon waxes, are frequently found in various sediments and could be adopted as paleovegetation and paleoclimate indicators. Nevertheless, scarce researches have focused on leaf waxes in higher plants of alpine region.Herein, hydrocarbon leaf wax components of Salix oritrepha, which flourish in Nianbaoyeze Mountains in eastern Tibetan Plateau were fully discussed. The n-alkane distribution in leaves ranges from n-C_(21) to nC_(29) with maxima at n-C_(25), which were entirely different with Salix taxa displayed in previous surveys in non-alpine regions. The unusual even carbon nalkenes from n-C_(22:1) to n-C_(30:1), which were thought to appear only in aquatic organisms, were firstly reported in an alpine plant. Additionally, iso-(2-methyl) alkanes, ranging from i-C_(23) to i-C_(29) with maxima at i-C_(25), which have been commonly reported in microorganisms, were also identified in an alpine plant for the first time. Unusual hydrocarbon distribution detected in Salix oritrepha leaf from Nianbaoyeze Mountains is most likely due to the extreme environment in such alpine region.
基金国家科技部"十一五"重大攻关项目(2006BAC01A02-02)国家自然基金(30600426)+3 种基金青海草地早熟禾牧草新品种原种扩繁(2006GB2G200323)Range Enclosureon the Tibetan Plateau of China:Impacts on Pastoral LivelihoodsMarketingLivestock Productivity and Rangeland Biodiversity-青海专项(INCO-CT-2006-032350)
文摘用高效液相色谱法测定山生柳中水杨苷、水杨酰水杨苷和木犀草素 7 O 葡萄糖苷的含量.流动相为1.5%醋酸溶液 甲醇,SymmetryC18柱,柱温30℃,流速1.1mL/min,检测波长270nm.线性浓度范围分别为527.0～105.4μg/mL,140.0～28.0μg/mL,81.0～16.2μg/mL,平均回收率是104.9%、104.6%和103.6%,RSD分别为2.0%、0.3%和0.3%.
