Chemotaxonomic significance of n-alkane distributions from leaf wax in genus of Sinojackia species (Styracaceae)

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• 作者：Jingjing Li^a ; ^b ; ^{ljjvalerie@gmail.com} ; Junhua Huang^b ; Jiwen Ge^c ; Xianyu Huang^b ; Shucheng Xie^a ; ^{xiecug@163.com}
• 关键词：n-Alkanes ; Sinojackia dolichocarpa ; Sinojackia ; Chemotaxonomy
• 刊名：Biochemical Systematics and Ecology
• 出版年：2013
• 出版时间：August, 2013
• 年：2013
• 卷：49
• 期：Complete
• 页码：30-36
• 全文大小：595 K

文摘

Sinojackia is a Chinese endemic genus of Styracaceae, containing eight species. The taxonomy of one species, Sinojackia dolichocarpa (¡ÔChangiostyrax dolichocarpa), is controversial. Here we investigate the distribution of leaf wax n-alkanes to clarify the chemotaxonomic position of S. dolichocarpa. Leaf samples of six Sinojackia species from Wuhan Botanical Garden in central China were collected during April, July, and December in 2010 to capture different developmental stages of the epicuticular waxes. Our results show that the waxes of S. dolichocarpa differ from the other five species by having a lower abundance of nC₃₁ but a higher abundance of nC₃₃. Although developmental variations of n-alkane distributions were observed during the sampling periods, cluster analysis based on the percentages of n-alkanes from C₂₇ to C₃₃ separates S. dolichocarpa from the other Sinojackia species. Based on these finding, we suggest S. dolichocarpa is a species independent of the Sinojackia genus.