DEVELOPMENTAL AND SEASONAL-VARIATIONS IN THE EPICUTICULAR WAXES OF TILIA-TOMENTOSA LEAVES

被引：47

作者：

GULZ, PG ^{[1
]}

MULLER, E ^{[1
]}

PRASAD, RBN ^{[1
]}

机构：

[1] INDIAN INST CHEM TECHNOL,DIV OILS & FATS,HYDERABAD 500007,INDIA

来源：

PHYTOCHEMISTRY | 1991年 / 30卷 / 03期

关键词：

TILIA-TOMENTOSA; TILIACEAE; EPICUTICULAR WAXES; DEVELOPMENTAL FACTORS; SEASONAL VARIATIONS; LEAF WAXES;

D O I：

10.1016/0031-9422(91)85249-Y

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

The epicuticular waxes of Tilia tomentosa were analysed continuously over one vegetation period. The rolled leaves in buds contain waxes quite different in composition from those of mature leaves. Waxes of very young unfolded leaves are composed of homologous series of hydrocarbons, alkyl esters, triterpenol esters, acetates, alcohols, fatty acids and alpha- and beta-amyrin. After 15 days of leaf unfolding, the biosynthesis of beta-amyrenyl acetate and later on aldehydes commenced. A rapid biosynthesis of epicuticular waxes was observed from April to June. Wax content doubled or tripled in that time. An increasing trend was found for the synthesis of hydrocarbons, aldehydes, alcohols, fatty acids, beta-amyrin and beta-amyrenyl acetate during the active biosynthetic phase. The synthesis of wax esters and acetates, however, had almost stopped after the unfolding of leaves. During leaf development beta-amyrenyl acetate became the dominant epicuticular wax component comprising ca 44% of the wax. From July to November the wax amount and composition remained nearly constant.

引用

页码：769 / 773

页数：5