Physiological Mechanism of Exogenous Silicon Alleviating Drought Stress in Maize

文献类型： 外文期刊

第一作者： Guo, Li-Feng

作者： Guo, Li-Feng;Liu, Jin-Ping;Xu, Jia-Qi;Wang, Yu-Xian;Zhao, Lei;Qian, Cong

作者机构：

关键词： Silicon; Maize; Drought Resistance; Enzymatic Activities

期刊名称：SCIENCE OF ADVANCED MATERIALS （ 影响因子：1.067； 五年影响因子：0.691 ）

ISSN： 1947-2935

年卷期： 2022 年 14 卷 2 期

页码：

收录情况： SCI

摘要： With the global warming, the impact of drought on agricultural production is increasingly prominent. Maize has a long growth period, high water demand, and is more sensitive to drought. Therefore, drought has always been one of the limited factors affecting the stable and increased on global maize production. Si promotes seed germination and seedling growth, enhances agricultural sustainability. However, its effects on different growth stages and different drought degree of maize are unclear in the field. In this experiment, to study its effects of drought in the large farmland moisture control test field (Xianyu 335) combined with exogenous Si during growth and development in maize. Exposed to drought-stressed conditions, Si further aggrandized antioxidant enzyme activities, reduced ROS contents, not only moderated AsA/DHA ratio but also GSH/GSSG ratio. Adding exogenous Si, the plant height IP: growth14.98.160.66rate, biomass,On: Fri, 13 photosyntheticMay 2022 pigment09:19:47contents, gas exchange parameters, photosynthetic enzymes activity, the stoatal size and aperture improved significantly, the contents of Copyright: American Scientific Publishers osmolyte further increased, as well as the increases were greater in the jointing stage than in the tasseling Delivered by Ingenta stage. In summary, applying exogenous Si can enhance the photosynthesis capacity of plants, promote the synthesis of osmotic substances, thus improving plant water metabolism balance, and enhance the antioxidant system, remove toxic substances, reduce membrane peroxidation, maintain cell membrane stability, alleviate stomatal limitation, and enhance maize drought resistance of the plant, thereby increasing yield.

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