Effects of different concentrations of exogenous selenium on wheat seedlings under moderate salt stress
Journal Title: Journal of Henan Agricultural University - Year 2024, Vol 58, Issue 5
Abstract
[Objective] To explore the alleviating effects of different concentrations of exogenous selenium (Se) on moderate salt stress (100 mmol·L-1) of wheat seedlings. [Method] A hydroponic experiment was carried out with wheat Bainong 207 and sodium selenite as test materials. Five treatments were set up: CK (without adding NaCl and Se), Na (100 mmol·L-1 NaCl), NaSe5 (100 mmol·L-1 NaCl+5 μmol·L-1 Se), NaSe10 (100 mmol·L-1 NaCl+10 μmol·L-1 Se) and NaSe20 (100 mmol·L-1 NaCl + 20 μmol·L-1 Se). Wheat seedling biomass, root parameters, photosynthetic characteristics (photosynthetic pigment content and photosynthetic parameters) and ion balance (Na+, K+ content and their transport coefficients) were determined. [Result] Compared with CK, the 100 mmol·L-1 NaCl stress significantly reduced dry matter accumulation, root morphological parameters, photosynthetic characteristics, K+ content and K+ transport coefficient in shoot and root, but significantly increased Na+ content and Na+ transport coefficient in roots and shoot of wheat seedlings. Under medium salt stress, wheat seedling exhibited varying responses to different concentrations of exogenous Se. Among them, the application of 5 μmol·L-1 Se could increase dry weight, total root surface area, chlorophyll a and net photosynthetic rate of wheat seedlings to the greatest extent by 15.00%, 44.36%, 34.65% and 39.21%, respectively. At the same time, this treatment decreased the Na+ transport coefficient and the Na+/K+ ratio in the ground and root of wheat seedlings to 11.13%, 42.37% and 51.18%. [Conclusion] Appropriate concentration of exogenous Se (5 μmol·L-1) can effectively alleviate the damage of moderate salt stress on the growth and development of wheat seedlings.
Authors and Affiliations
Haoquan WANG, Dongxia YANG, Hong'en LIU, Haiyang LIU, Wenyi LIU, Zhikang TAO, Linglu WANG, Zhaojun NIE
Keywords
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- EP ID EP769456
- DOI 10.16445/j.cnki.1000-2340.20240605.002
- Views 3
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