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Repair Effects of Scenedesmus obliquus on Cucumber Seedlings Under Saline-Alkali Stress

文献类型： 外文期刊

作者： Liu, Zhao 1 ; Dong, Yanlong 1 ; Jin, Xiaoxia 1 ; Liu, Yan 1 ; Yue, Zhonghui 1 ; Li, Wei 1 ;

作者机构： 1.Harbin Normal Univ, Coll Life Sci & Technol, 1,Shida Rd,Limin Econ Dev Zone, Harbin 150025, Peoples R China

2.Heilongjiang Acad Agr Sci, Hort Branch, Harbin 150069, Peoples R China

关键词： Scenedesmus obliquus; cucumber; saline-alkali stress; microstructure; ultrastructure

期刊名称：AGRONOMY-BASEL （ 影响因子：3.4； 五年影响因子：3.8 ）

ISSN：

年卷期： 2025 年 15 卷 6 期

页码：

收录情况： SCI

摘要： In this study, cucumber seedlings were treated with Scenedesmus obliquus at different concentrations (0.25, 0.50, 0.75, 1 gL-1) under saline-alkali stress (60 mM and 90 mM). The effects of Scenedesmus obliquus on the repair of cucumber seedlings under saline-alkali stress were explored from physiological and morphological perspectives by measuring growth physiological indices and observing microstructure. It provides a cytological basis for the development of microalgae biofertilizer. The results showed that the addition of Scenedesmus obliquus effectively alleviated the physiological and structural damage in cucumber seedlings caused by saline-alkali stress, with the best mitigation effect at 0.75 gL-1. More specifically, the addition of Scenedesmus obliquus significantly improved seedling fresh weight and plant height under saline-alkali stress, increased stem vascular vessel diameter, thickened vessel walls, reduced structural damage, the structural recovery of mitochondria, nuclei, and other organelles in the phloem; The results showed that root xylem vessel distribution became more centralized, vessel diameter decreased, and wall thickness decreased, with other changes similar to those in the stem; The number and volume of mesophyll cells increased, chloroplast morphology recovered, and chlorophyll content rose, effectively alleviating the impact of saline-alkali stress on photosynthesis. MDA content decreased, mitigating oxidative damage caused by saline-alkali stress.

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