文献类型： 外文期刊
作者： Zhang, Shujie 1 ; Wen, Xinyue 1 ; Zhou, Guangshun 1 ; Cui, Pengjuan 4 ; Li, Fang 1 ; Han, Yanlai 1 ; Wang, Yi 1 ;
作者机构： 1.Henan Agr Univ, Coll Resources & Environm, Zhengzhou, Peoples R China
2.Henan Agr Univ, State Key Lab Wheat & Maize Crop Sci, Zhengzhou, Peoples R China
3.Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, State Key Lab Efficient Utilizat Arid & Semiarid A, Beijing, Peoples R China
4.Dev Ctr Seed Ind Henan Prov, Zhengzhou, Peoples R China
关键词：
Oxidative damage; plant growth; salt stress;
期刊名称：NEW ZEALAND JOURNAL OF BOTANY （ 影响因子：1.4； 五年影响因子：1.1 ）
ISSN： 0028-825X
年卷期： 2025 年 63 卷 5 期
页码：
收录情况： SCI
摘要： This study delves into the key physiological adaptations of maize inbred lines with varying salt tolerance levels, aiming to unravel their core response mechanisms to salt stress. Utilising a hydroponic system with 150 mM NaCl as the stressor, we observed pronounced growth inhibition in maize, marked by reduced biomass and plant height, with Mo17 exhibiting superior tolerance over B73. Genotype-NaCl interactions significantly modulated K+/Na+ ratio, malondialdehyde (MDA), hydrogen peroxide (H2O2) levels, and antioxidant enzyme activities. Notably, salt stress triggered Na+ accumulation while diminishing K+ content, yet Mo17 maintained a higher K+/Na+ ratio in roots, indicative of efficient ion homeostasis. Furthermore, Mo17 exhibited lower MDA and H2O2 contents and higher peroxidase (POD) activity, suggesting enhanced oxidative stress resilience. Regression analysis highlighted the positive correlation between shoot biomass and K+/Na+ ratio, POD activity, and negative relationship with MDA and H2O2. Random forest modelling confirmed K+/Na+ and MDA as pivotal factors influencing maize biomass. In conclusion, salt tolerant maize varieties harness high K+/Na+ ratio to mitigate salt ion toxicity, bolster antioxidant defenses, minimise MDA production, and thereby reveal crucial physiological hallmarks of salt tolerance.
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