Vol15 No.11: 2445-2452
【Title】Unusual hydrocarbon waxes detected in Salix oritrepha leaf from Nianbaoyeze Mountains, eastern Qinghai-Tibetan Plateau
【Author】PU Yang*; CAO Ji-cheng; JIA Ji-hong; SHAO Xiao-hua; HAN Yue
【Addresses】School of Geographical Sciences, Nanjing University of Information Science & Technology, Nanjing 210044, China
【Corresponding author】PU Yang
【Citation】Pu Y, Cao JC, Jia JH, et al. (2018) Unusual hydrocarbon waxes detected in Salix oritrepha leaf from Nianbaoyeze Mountains, eastern Qinghai-Tibetan Plateau. Journal of Mountain Science 15(11). https://doi.org/10.1007/s11629-017-4646-y
【Abstract】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-C21 to n-C29 with maxima at n-C25, which were entirely different with Salix taxadisplayed in previous surveys in non-alpine regions. The unusual even carbon n-alkenes from n-C22:1 to n-C30:1, which were thought to appear only in aquatic organisms, were firstly reported in an alpine plant. Additionally, iso-(2-methyl) alkanes, ranging from i-C23 to i-C29 with maxima at i-C25, 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.
【Keywords】Leaf waxes; Salix oritrepha; Alpine region; n-alkanes; n-alkenes; i-alkanes