期刊
PLANTA
卷 251, 期 5, 页码 -出版社
SPRINGER
DOI: 10.1007/s00425-020-03383-5
关键词
Carotenoids; Deposition; Ultrastructure; Xanthophyll esters; Tubules; Disc-like crystallites
资金
- China Postdoctoral Science Foundation [2019M650899]
- China Scholarship Council (CSC) [201606350121]
Main conclusion Formation of specific ultrastructural chromoplastidal elements during ripening of fruits of three different colored Physalis spp. is closely related to their distinct carotenoid profiles. The accumulation of color-determining carotenoids within the chromoplasts of ripening yellow, orange, and red fruit of Physalis pubescens L., Physalis peruviana L., and Physalis alkekengi L., respectively, was monitored by high-performance liquid chromatography/diode array detector/tandem mass spectrometry (HPLC-DAD-MS/MS) as well as light and transmission electron microscopy. Both yellow and orange fruit gradually accumulated mainly beta-carotene and lutein esters at variable levels, explaining their different colors at full ripeness. Upon commencing beta-carotene biosynthesis, large crystals appeared in their chromoplasts, while large filaments protruding from plastoglobules were characteristic elements of chromoplasts of orange fruit. In contrast to yellow and orange fruit, fully ripe red fruit contained almost no beta-carotene, but esters of both beta-cryptoxanthin and zeaxanthin at very high levels. Tubule bundles and unusual disc-like crystallites were predominant carotenoid-bearing elements in red fruit. Our study supports the earlier hypothesis that the predominant carotenoid type might shape the ultrastructural carotenoid deposition form, which is considered important for color, stability and bioavailability of the contained carotenoids.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据