Title：
Different responses of the halophyte Carex pumila to salt stress
Authors：
Corresponding
Author：
Wang, S. W., Xu, F. F., Guo, L. J., He, T. T., Li, X. L., Yuan, L., Wang, Q. F., Liu, H. T*
Pubyear：
2020
Title of
Journal：
Biologia Plantarum
Paper
Code：
Volume：
64
Number：
Page：
519-528
Others：
Classification：
Source：
Abstract：
Salt stress is one of the most important stresses that affect coastal vegetation. A halophyte Carex pumila plays a crucial role in the maintenance of fragile ecosystems in coastal areas. Thus, understanding the mechanism of C. pumila responses to salt stress is a prerequisite for the conservation and utilization of this species. After treatment with 200, 300, 400, 500 mM NaCl for 60 h, C. pumila leaves displayed a decline in the relative water content and an increase in salt injury index. Osmolyte accumulation, as a function of osmotic adjustment, and antioxidant enzyme activities were maintained under salinity, even at a high NaCl concentration. High NaCl concentrations severely affected the photosystem II, the JIP-test indicated a significant decrease in performance indexes and quantum efficiencies and an increase in phenomenological fluxes. Metabolic analyses showed the changes of 39 metabolites, including 16 kinds of organic acids, 9 kinds of amino acids, 9 kinds of sugars. 3 kinds of sugar alcohols, and 2 amines. The identified metabolites were mainly involved in the glycolysis, pentose phosphate pathway, and tricarboxylic acids cycle.
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