Response of Elymus nutans Griseb. seedling physiology and endogenous hormones to drought and salt stress

作者：Jianting Long, Dandan Liu, Wei Qiao, Yanwei Wang, Miao YanJun, Henna Baosai · 发表于：Scientific Reports · 年份：2024 · DOI：10.1038/s41598-024-68894-7 · 被引用次数：7 · 研究领域：Plant Stress Responses and Tolerance、Plant Water Relations and Carbon Dynamics、Seed Germination and Physiology

Elymus nutans Griseb. ( E. nutans ), a pioneer plant for the restoration of high quality pasture and vegetation, is widely used to establish artificial grasslands and ecologically restore arid and salinized soils. To investigate the effects of drought stress and salt stress on the physiology and endogenous hormones of E. nutans seedlings, this experiment configured the same environmental water potential (0 (CK), − 0.04, − 0.14, − 0.29, − 0.49, − 0.73, and − 1.02 MPa) of PEG-6000 and NaCl stress to investigate the effects of drought stress and salt stress, respectively, on E. nutans seedlings under the same environmental water potential. The results showed that although the physiological indices and endogenous hormones of the E. nutans seedlings responded differently to drought stress and salt stress under the same environmental water potential, the physiological indices of E. nutans shoots and roots were comprehensively evaluated using the genus function method, and the physiological indices of the E. nutans seedlings under the same environmental water potential exhibited better salt tolerance than drought tolerance. The changes in endogenous hormones of the E. nutans seedlings under drought stress were analyzed to find that treatment with gibberellic acid (GA 3 ), gibberellin A 7 (GA 7 ), 6-benzyladenine (6-BA), 6-(y,y-dimethylallylaminopurine) (2.IP), trans -zeatin (TZ), kinetin (KT), dihydrozeatin (DHZ), indole acetic acid (IAA), and 2,6-dichloroisonicotininc acid (INA) wa...