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Effect of AM fungi on the growth and powdery mildew development of Astragalus sinicus L. under water stress

文献类型： 外文期刊

作者： Shang, Panpan 1 ; Zheng, Rongchun 1 ; Li, Yingde 1 ; Han, Shang 5 ; Tang, Shan 5 ; Wu, Ji 5 ; Duan, Tingyu 1 ;

作者机构： 1.Lanzhou Univ, Key Lab Herbage Improvement & Grassland Agroecosys, Lanzhou 730020, Peoples R China

2.Minist Agr & Rural Affairs, Key Lab Grassland Livestock Ind Innovat, Lanzhou 730020, Peoples R China

3.Lanzhou Univ, Coll Pastoral Agr Sci & Technol, Lanzhou 730020, Peoples R China

4.Gansu Tech Innovat Ctr Western China Grassland Ind, Minist Educ, Engn Res Ctr Grassland Ind, Lanzhou, Peoples R China

5.Anhui Acad Agr Sci, Anhui Prov Key Lab Nutr Cycling Resources & Enviro, Inst Soil & Fertilizer, Hefei 230031, Peoples R China

关键词： Arbuscular mycorrhizal fungi; Astragalus sinicus; Water stress; Powdery mildew; WGCNA

期刊名称：PLANT PHYSIOLOGY AND BIOCHEMISTRY （ 影响因子：5.7； 五年影响因子：6.4 ）

ISSN： 0981-9428

年卷期： 2025 年 219 卷

页码：

收录情况： SCI

摘要： Arbuscular mycorrhizal (AM) fungi are widely existing soil microorganisms that form symbiotic relationships with most terrestrial plants. They are important for enhancing adversity resistance, including resistance to disease and water stresses. Nevertheless, it is not clear whether the benefits can be maintained in regulating the occurrence of plant diseases under drought, flooding stress and during water restoration. In this study, we investigated the effect of AM fungus (Glomus versiforme) on the development of powdery mildew in Chinese milk vetch (Astragalus sinicus) under drought, flooding, and water recovery. The results showed that AM fungal symbiosis promoted the growth of Chinese milk vetch under water stress conditions. It increased the accumulation of ethylene (ET) and jasmonic acid (JA), enhanced the activities of antioxidant enzymes, and decreased the accumulation of salicylic acid (SA) and abscisic acid (ABA). The differentially expressed genes (DEGs) obtained from transcriptome sequencing under each stress were subjected to weighted gene co-expression network analysis (WGCNA), and a total of 12 gene co-expression modules were obtained. The analysis of the relationship between the co-expressed genes in the 12 modules and plant physiological traits showed that the magent, grey60 and darkturquoise modules were significantly associated with ET, SA, JA, ABA, plant defence enzyme activities, malondialdehyde (MDA) and H2O2 content. Water stress and disease were related with the up-regulated expression of genes in the flavonoid biosynthesis and oxidative phosphorylation, plant hormone signal transduction and plant-pathogen interaction pathways. Importantly, inoculation with AM fungus reduced the incidence of powdery mildew under drought stress by 16.54%. In summary, the results of this study showed that inoculation with AM had a positive effect on powdery mildew development tolerance in Chinese milk vetch under drought and flooding stresses and stress recovery. This provides a good basis for field management and sustainable growth of green manure crop Chinese milk vetch.

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