Foliar Application of Selenium Enhances Drought Tolerance in Tomatoes by Modulating the Antioxidative System and Restoring Photosynthesis
文献类型： 外文期刊
作者： Zhong, Yuan 1 ; Cui, Haixue 2 ; Li, Huanhuan 2 ; Qiang, Xiaoman 2 ; Han, Qisheng 2 ; Liu, Hao 2 ;
作者机构： 1.Zhengzhou Univ, Sch Agr Sci, Zhengzhou 450001, Peoples R China
2.Chinese Acad Agr Sci, Key Lab Crop Water Use & Regulat, Minist Agr & Rural Affairs, Farmland Irrigat Res Inst, Xinxiang 453002, Peoples R China
3.Shandong Agr Univ, Coll Water Conservancy & Civil Engn, Tai An 271018, Peoples R China
关键词： tomato; drought stress; exogenous selenium; peroxide; photosynthesis
期刊名称：AGRONOMY-BASEL （ 影响因子：3.3； 五年影响因子：3.7 ）
ISSN：
年卷期： 2024 年 14 卷 6 期
页码：
收录情况： SCI
摘要：
Drought stress can impact the physiological and biochemical properties of crops. However, selenium (Se) can effectively alleviate the abiotic stress experienced by plants. This study aims to investigate how applying selenium to tomato leaves affects their antioxidant system and photosynthetic traits when subjected to drought conditions. The experiment used four different foliar selenium concentrations and three different irrigation levels. The investigation scrutinized the effects of foliar spraying employing different selenium concentrations on the antioxidant system, osmotic adjustment substances, photosynthetic performance, and growth indices of tomatoes under drought stress. The findings indicated that drought stress led to cellular oxidative damage, significantly elevating peroxide, MDA, proline, and soluble sugar content (p < 0.001). Under severe drought stress, malondialdehyde (MDA) and proline levels increased by 21.2% and 110.0% respectively, compared to well-watered conditions. Concurrently, the net photosynthetic rate exhibited a reduction of 26.0% and dry matter accumulation decreased by 35.5%. However, after spraying with a low concentration of selenium, selenium reduced oxidative damage and malondialdehyde content by reducing the content of peroxide in leaves, restoring photosynthesis, and promoting the normal growth of tomato. Compared to the control group, spraying with 2.5 mg
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