Comparative analyses of cuticular waxes on various organs of faba bean (Vicia faba L.)
Comparative analyses of cuticular waxes on various organs of faba bean (Vicia faba L.)
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蚕豆（Vicia faba L.）各器官角质层蜡质的比较分析
DOI：
10.1016/j.plaphy.2019.03.015
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发表时间：
2019
影响因子：
6.5
通讯作者：
Guo Yanjun
中科院分区：
文献类型：
--
作者：
Zhao Xiao;Huang Lei;Kang Lin;Jetter Reinhard;Yao Luhua;Li Yang;Xiao Yu;Wang Dengke;Xiao Qianlin;Ni Yu;Guo Yanjun
角质层蜡质覆盖在植物表面，起着疏水层的作用，在植物种和植物器官之间表现出不同的蜡质分布。本文报道了蚕豆（Vicia faba）叶片、茎、荚皮、花瓣（旗、翅、龙骨）和荚皮种皮蜡质的综合分析结果。共鉴定出7类蜡化合物，包括脂肪酸、伯醇、烷基酯、醛、烷烃、肉桂醇酯和烷基间苯二酚。总的来说，伯醇占主导地位的叶片和种皮蜡在荚果果皮，烷烃积累了大量的茎和花瓣，而烷基间苯二酚观察到在叶，茎和荚果果皮。暴露于空气中的器官的蜡质覆盖率（>1.2 μg/cm ~ 2）高于种皮上的蜡质覆盖率（<0.8 μg/cm ~ 2），其中龙骨的蜡质覆盖率最高。同时，随着种子的发育，种皮蜡质覆盖率逐渐降低。蜡的覆盖度、化合物种类分布和链长分布在器官间的差异表明蜡的沉积与其生理生态功能有关，参与蜡生物合成的酶也表现出器官特异性。
Cuticular waxes cover the plant surface and serve as hydrophobic layer, exhibiting various wax profiles between plant species and plant organs. This paper reports comprehensive analysis of the waxes on organs exposed to air, including leaf, stem, pod pericarp, and petals (banner, wing and keel), and on seed coat enwrapped in pod pericarp of faba bean (Vicia faba). In total 7 classes of wax compounds were identified, including fatty acids, primary alcohols, alkyl esters, aldehydes, alkanes, cinnamyl alcohol esters, and alkylresorcinols. Overall, primary alcohols dominated the waxes on leaves and the seed coat enwrapped in pod pericarp, alkanes accumulated largely in stem and petals, whereas alkylresorcinols were observed in leaf, stem and pod pericarp. Organs exposed to air had higher coverage (>1.2 μg/cm2) than those on seed coat (<0.8 μg/cm2), and keel having the highest wax coverage. Meanwhile, the wax coverage on seed coat reduced during the seed development. The variations of wax coverages, compound class distributions and chain length profiles among organs suggested that wax depositions were associated with their ecophysiological functions, and the enzymes involved in wax biosynthesis also showed organ-specific.