Osmotic regulation and chlorophyll fluorescence characteristics in leaves of wheat seedlings under different salt stresses

• Published in: Ying yong sheng tai xue bao Vol. 32; no. 12; p. 4381
• Main Authors: Zhang, Ya, Shi, Shu-Qian, Li, Ya-Ping, Gao, Tian-Peng, Yang, Ying-Li
• Format: Journal Article
• Language: Chinese
• Published: China 01.12.2021
• Subjects: Chlorophyll; Chlorophyll A; Fluorescence; Photosynthesis; Plant Leaves; Salt Stress; Seedlings; Triticum; calcium salt; sodium salt; osmotic regulation; wheat; photosynthetic characteristic
• ISSN: 1001-9332
• DOI: 10.13287/j.1001-9332.202112.023

The damage mechanism of salt stress on plants has attracted much attention. In order to reveal the damage mechanism of different salt stresses, we compared osmotic regulation and photosynthetic characteristics of seedlings of wheat cultivar Xianhan 3 under sodium salt (150 mmol·L ) and calcium salt (5, 30 mmol·L ) treatments alone or in combination. The results showed that sodium salt or calcium salt stress alone significantly inhibited the growth of roots and stems, but increased the amount of soluble sugar and proline, regulatory energy-dissipated electron yield, non-photochemical quenching and relative content of zeaxanthin contents in leaves. In contrast, salt treatments alone significantly decreased the levels of chlorophyll a and chlorophyll b, maximum photochemical efficiency, PSⅡ photochemical efficiency, photochemical quenching and photosynthetic electron transport efficiency. Furthermore, the inhibition of wheat seedling growth was more sensitive to calcium salt than to sodium salt stress, whereas t