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Chemical composition of the cuticular membrane in guava fruit (Psidium guajava L.) affects barrier property to transpiration

文献类型： 外文期刊

作者： Huang, Hua 1 ; Lian, Qiaoqiao 1 ; Wang, Ling 2 ; Shan, Youxia 1 ; Li, Fengjun 1 ; Chang, Sui Kiat 1 ; Jiang, Yueming 1 ;

作者机构： 1.Chinese Acad Sci, Key Lab Plant Resources Conservat & Sustainable U, South China Bot Garden, Guangzhou 510650, Peoples R China

2.Minist Agr & Rural Affairs, Sericultural & Agrifood Res Inst, Guangdong Acad Agr Sci, Key Lab Funct Foods,Guangdong Key Lab Agr Prod Pr, Guangzhou 510610, Peoples R China

3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China

关键词： Guava fruit; Chemical composition; Cuticular waxes; Cutin monomers; Barrier properties; Transpiration

期刊名称：PLANT PHYSIOLOGY AND BIOCHEMISTRY （ 影响因子：4.27； 五年影响因子：4.816 ）

ISSN： 0981-9428

年卷期： 2020 年 155 卷

页码：

收录情况： SCI

摘要： The cuticular membrane covering almost all aerial plant organs has a primary function in limiting uncontrolled water loss. The guava fruits were collected and this work was done to study the potential contribution of cuticular chemical composition to fruit transpiration after harvest. The detailed cuticular chemical composition, based on gas chromatography together with mass spectrometry, and the transpiration rate determined gravimetrically in guava fruit were characterized in the present study. The predominant wax mixtures were fatty acids and primary alcohols with homologous series of C-16-C-33, as well as various pentacyclic triterpenoids with abundant amounts of ursolic acid, maslinic acid and uvaol. The most prominent cutin compounds were C-16 and C-18-type monomers dominated by 9(10),16-diOH-hexadecanoic acid and 9,10-epoxy-omega-OH-octadecanoic acid, respectively. Relatively high water permeability with a value of 5.1 x 10(-4) m s(-1) was detected for guava fruit. The lower efficiency of the cuticle as barrier to transpiration in guava fruit, as compared to that of other reported fruits, leaves, and petals, was seemingly related to the relatively short average chain-length of acyclic compounds in wax mixtures. These findings provide useful insights linking the chemical composition of the cuticular membrane that covers plant organs to putative physiological roles.

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