Zhao Wei, Wang Xiyue, Wei Xinhe, Li Xiaomei, Sun Jixuan, Dong Shoukun
College of Agriculture, Northeast Agricultural University, No. 600 Changjiang Road, Xiangfang District, Harbin, 150030, China.
College of Agriculture, Heilongjiang Agricultural Engineering Vocational College, No. 2 Qunying Street, Limin Economic and Technological Development Zone, Harbin, 150025, China.
AoB Plants. 2025 Jul 16;17(4):plaf026. doi: 10.1093/aobpla/plaf026. eCollection 2025 Aug.
Drought stress can affect the growth of soybean seedlings because soybeans require a large amount of water for growth and development. However, the storage and redistribution of water in the soil are related to the soil's texture. This experiment used the soybean varieties hefeng46 and heinong84, and studied the effects of four moisture conditions on the content of membrane lipid peroxides, the activities of enzymes and non-enzymatic antioxidants the content, and also the key enzymes of carbon and nitrogen metabolism in soybean seedlings under loamy sand and sandy loam soil conditions. The results suggested that as the duration of drought increased, in loamy sand, under serious drought (SD), the contents of malondialdehyde and proline, as well as the activities of superoxide dismutase and glutamine synthetase, in hefeng46 and heinong84 were significantly increased by 160% and 146%, 1431% and 1924%, 167% and 282%, and 64% and 69%, respectively, compared to the normal water (CK). However, in sandy loam, the hydrolytic direction activity of sucrose synthase in intermediate drought treated hefeng46 and heinong84 was significantly increased by 1247% and 169% compared to the CK, and the content of reduced glutathione was dramatically raised. In contrast, the synthetic direction activity of sucrose synthase in SD treated hefeng46 and heinong84 was significantly decreased by 69% and 70% compared to the CK. The combined results indicated that under drought stress, soybean in sandy loam soil exhibited stronger drought resistance.
干旱胁迫会影响大豆幼苗的生长，因为大豆生长发育需要大量水分。然而，土壤中水分的储存和再分配与土壤质地有关。本实验选用大豆品种合丰46和黑农84，研究了在砂壤土和砂质壤土条件下，四种水分条件对大豆幼苗膜脂过氧化物含量、酶和非酶抗氧化剂活性、含量以及碳氮代谢关键酶的影响。结果表明，随着干旱持续时间增加，在砂壤土中，严重干旱（SD）条件下，合丰46和黑农84的丙二醛和脯氨酸含量以及超氧化物歧化酶和谷氨酰胺合成酶活性，与正常水分（CK）相比，分别显著增加了160%和146%、1431%和1924%、167%和282%、64%和69%。然而，在砂质壤土中，中度干旱处理的合丰46和黑农84中蔗糖合酶的水解方向活性与CK相比显著增加了1247%和169%，还原型谷胱甘肽含量大幅提高。相反，SD处理的合丰46和黑农84中蔗糖合酶的合成方向活性与CK相比显著降低了69%和70%。综合结果表明，在干旱胁迫下，砂质壤土中的大豆表现出较强的抗旱性。
