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Defining key metabolic roles in osmotic adjustment and ROS homeostasis in the recretohalophyte Karelinia caspia under salt stress.

Authors :
Guo, Qiang
Han, Jiwan
Li, Cui
Hou, Xincun
Zhao, Chunqiao
Wang, Qinghai
Wu, Juying
Mur, Luis A. J.
Source :
Physiologia Plantarum; Mar2022, Vol. 174 Issue 2, p1-16, 16p
Publication Year :
2022

Abstract

The recretohalophyte Karelinia caspia is of forage and medical value and can remediate saline soils. We here assess the contribution of primary/secondary metabolism to osmotic adjustment and ROS homeostasis in Karelinia caspia under salt stress using multiā€omic approaches. Computerized phenomic assessments, tests for cellular osmotic changes and lipid peroxidation indicated that salt treatment had no detectable physical effect on K. caspia. Metabolomic analysis indicated that amino acids, saccharides, organic acids, polyamine, phenolic acids, and vitamins accumulated significantly with salt treatment. Transcriptomic assessment identified differentially expressed genes closely linked to the changes in above primary/secondary metabolites under salt stress. In particular, shifts in carbohydrate metabolism (TCA cycle, starch and sucrose metabolism, glycolysis) as well as arginine and proline metabolism were observed to maintain a low osmotic potential. Chlorogenic acid/vitamin E biosynthesis was also enhanced, which would aid in ROS scavenging in the response of K. caspia to salt. Overall, our findings define key changes in primary/secondary metabolism that are coordinated to modulate the osmotic balance and ROS homeostasis to contribute to the salt tolerance of K. caspia. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
00319317
Volume :
174
Issue :
2
Database :
Complementary Index
Journal :
Physiologia Plantarum
Publication Type :
Academic Journal
Accession number :
156556137
Full Text :
https://doi.org/10.1111/ppl.13663