当前位置: X-MOL 学术Org. Geochem. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Molecular n-alkyl leaf waxes of three dominant plants from the temperate forest in South America
Organic Geochemistry ( IF 3 ) Pub Date : 2020-11-01 , DOI: 10.1016/j.orggeochem.2020.104105
Carol Cerda-Peña , Sergio Contreras , Jaime R. Rau

Abstract The n-alkyl leaf waxes of the temperate forest of South America are poorly studied, despite being a biogeographically isolated forest spanning wide environmental conditions. To evaluate whether local species adaptation and environmental changes influence the n-alkyl leaf wax composition, we measured the molecular abundance and distribution of n-alkyl leaf waxes (n-alkanoic acids, n-alkanes and n-alkanols) of three dominant native species from southern temperate forest in South America. We surveyed Araucaria araucana (n = 9), Nothofagus dombeyi (n = 17) and Chusquea sp. (n = 21) at different elevations. The relationship of n-alkyl leaf wax abundance and distribution with elevation is not significant in any species, except for n-alkane ACL (average chain length) in Chusquea sp. Significant correlations are found for n-alkanoic acid abundance with precipitation and aridity in Chusquea sp. and n-alkane abundance and ACL with temperature in A. araucana. These data suggest a species-specific response to environmental variables. The main similarity in the three species is a higher abundance of n-alkanoic acids (>60%) relative to other n-alkyl leaf waxes. Only n-alkanols are not correlated to any environmental variable, and neither ACL nor Cmax overlap among species. These results suggest n-alkanols as a potential chemotaxonomic indicator at a lower taxonomic level in the region.

中文翻译:

南美温带森林三种优势植物的正烷基叶蜡分子

摘要 尽管南美洲温带森林是一个跨越广泛环境条件的生物地理隔离森林,但对正烷基叶蜡的研究很少。为了评估当地物种适应和环境变化是否影响正烷基叶蜡的组成,我们测量了三种主要原生物种的正烷基叶蜡(正链烷酸、正链烷烃和正链烷醇)的分子丰度和分布来自南美洲的南部温带森林。我们调查了 Araucaria araucana (n = 9)、Nothofagus dombeyi (n = 17) 和 Chusquea sp。(n = 21) 在不同的海拔。除了 Chusquea sp. 中的正烷烃 ACL(平均链长)外,正烷基叶蜡丰度和分布与海拔的关系在任何物种中都不显着。在 Chusquea sp. 中发现了正链烷酸丰度与降水和干旱的显着相关性。A. araucana 中正烷烃丰度和 ACL 与温度的关系。这些数据表明对环境变量的物种特异性反应。这三个物种的主要相似之处是相对于其他正烷基叶蜡,正链烷酸的丰度更高 (>60%)。只有正链烷醇与任何环境变量无关,物种之间的 ACL 和 Cmax 都不重叠。这些结果表明,正链烷醇是该地区较低分类水平的潜在化学分类指标。这三个物种的主要相似之处是相对于其他正烷基叶蜡,正链烷酸的丰度更高 (>60%)。只有正链烷醇与任何环境变量无关,物种之间的 ACL 和 Cmax 都不重叠。这些结果表明,正链烷醇是该地区较低分类水平的潜在化学分类指标。这三个物种的主要相似之处是相对于其他正烷基叶蜡,正链烷酸的丰度更高 (>60%)。只有正链烷醇与任何环境变量无关,物种之间的 ACL 和 Cmax 都不重叠。这些结果表明,正链烷醇是该地区较低分类水平的潜在化学分类指标。
更新日期:2020-11-01
down
wechat
bug