Abscisic Acid Can Improve the Salt Tolerance and Yield of Rice by Improving Its Physiological Characteristics

作者：Xi Wang, Guohui Ma, Naijie Feng, Dianfeng Zheng, Hang Zhou, Jiahuang Li, Jiashuang Wu, Bing Xu, Wenting Su, Yixi Huang · 发表于：Agronomy · 年份：2025 · DOI：10.3390/agronomy15020309 · 被引用次数：8 · 研究领域：Plant Stress Responses and Tolerance、Silicon Effects in Agriculture、Aluminum toxicity and tolerance in plants and animals

Salt stress exerts a notable influence on rice’s normal growth and development process. It causes a decline in rice yield, and in certain extreme cases can lead to the complete failure of rice crops. Abscisic acid, also known as S-ABA, may play an important role in regulating rice plant responses to various stressors and promoting crop growth against adversity. In this research, the impact of externally applied S-ABA (0.03% S-ABA, diluted 100 times) on the growth and yield of rice was explored. The experiment made use of the traditional rice variety Huanghuazhan as the test material. The study focused on how S-ABA affected rice at various growth phases under salt-stress conditions. The effects of S-ABA sprayed once (three-leaf/one-heart stage) and twice (three-leaf/one-heart stage, break stage) on the photosynthetic characteristics, antioxidant metabolism, membrane lipid peroxidation products, osmotic regulation, and yield of rice under 0.4% NaCl were studied. The experimental outcomes indicated that the presence of salt stress had a restraining effect on the growth of rice. There was a notable decline in the net photosynthetic rate; moreover, the yield was diminished by 26.90%. Salt-induced stress clearly imposed negative impacts on these aspects of rice’s physiological functions and productivity. The exogenous application of S-ABA was highly effective in mitigating the inhibitory influence of salt stress on the growth of rice. When S-ABA was sprayed on two occasions, there ...