Effect of Salinity on Leaf Functional Traits and Chloroplast Lipids Composition in Two C3 and C4 Chenopodiaceae Halophytes

被引:3
作者
Rozentsvet, Olga [1 ]
Shuyskaya, Elena [2 ]
Bogdanova, Elena [1 ]
Nesterov, Viktor [1 ]
Ivanova, Larisa [3 ]
机构
[1] Russian Acad Sci, Samara Fed Res Sci Ctr, Inst Ecol Volga River Basin, Tolyatti 445003, Russia
[2] Russian Acad Sci, KA Timiryazev Inst Plant Physiol, Moscow 127276, Russia
[3] Tyumen State Univ, Inst Environm & Agr Biol X BIO, Tyumen 625003, Russia
来源
PLANTS-BASEL | 2022年 / 11卷 / 19期
关键词
C-3; C-4; cell morphology; chloroplast; fatty acids; halophytes; leaf anatomy; lipids membrane; STEPPE PLANTS; PHOTOSYNTHESIS; LEAVES; SALT; HOMEOSTASIS; MESOPHYLL; FAMILY; ARABIDOPSIS; ADAPTATION; COTYLEDONS;
D O I
10.3390/plants11192461
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
Salt stress is one of the most common abiotic kinds of stress. Understanding the key mechanisms of salt tolerance in plants involves the study of halophytes. The effect of salinity was studied in two halophytic annuals of Chenopodiaceae Salicornia perennans Willd. and Climacoptera crassa (Bied.) Botsch. These species are plants with C-3 and C-4-metabolism, respectively. We performed a comprehensive analysis of the photosynthetic apparatus of these halophyte species at different levels of integration. The C-3 species S. perennans showed larger variation in leaf functional traits-both at the level of cell morphology and membrane system (chloroplast envelope and thylakoid). S. perennans also had larger photosynthetic cells, by 10-15 times, and more effective mechanisms of osmoregulation and protecting cells against the toxic effect of Na+. Salinity caused changes in photosynthetic tissues of C. crassa such as an increase of the mesophyll cell surface, the expansion of the interface area between mesophyll and bundle sheath cells, and an increase of the volume of the latter. These functional changes compensated for scarce CO2 supply when salinity increased. Overall, we concluded that these C-3 and C-4 Chenopodiaceae species demonstrated different responses to salinity, both at the cellular and subcellular levels.
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页数:14
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