类囊体
叶绿体
生物
超微结构
光合作用
过氧化物酶体
线粒体
细胞质
细胞生物学
植物细胞
液泡
植物
生物物理学
生物化学
基因
作者
Yu. V. Venzhik,A. N. Deryabin,И. Е. Мошков
出处
期刊:Plant Science
[Elsevier BV]
日期:2023-04-28
卷期号:332: 111722-111722
被引量:13
标识
DOI:10.1016/j.plantsci.2023.111722
摘要
The review is focused on a comparative analysis of the literature data on the ultrastructural reorganization of leaf cells of higher plants, which differ in their response to low sub-damaging temperatures. The importance of adaptive structural reorganization of cells as a special feature contributing to the surviving strategy of plants existing under changed conditions is emphasized. The adaptive strategy of cold-tolerant plants combines the structural, functional, metabolic, physiological and biochemical reorganization of cells and tissues. These changes constitute a unified program directed to protecting against dehydration and oxidative stress, as well as maintaining basic physiological processes, and above all, photosynthesis. The ultrastructural markers of cold-tolerant plants adaptation to low sub-damaging temperatures include some particular changes in cell morphology. Namely: the following: an increase in the volume of the cytoplasm; the formation of new membrane elements in it; an increase in the size and number of chloroplasts and mitochondria; concentration of mitochondria and peroxisomes near chloroplasts; polymorphism of mitochondria; an increase in the number of cristae in them; the appearance of outgrowths and invaginations in chloroplasts; lumen expansion in the thylakoids; the formation in chloroplasts “sun type” membrane system with reduction in the number and size of grana and domination of non-appressed thylakoids membranes. Due to this adaptive structural reorganization cold-tolerant plants are able to function actively during chilling. On the contrary, structural reorganization of leaf cells of cold-sensitive plants under chilling is aimed at maintaining the basic functions at a minimum level. Cold-sensitive plants “wait out” low temperature stress, and with prolonged exposure to cold, they die from dehydration and intensification of oxidative stress.
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