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Strategies for plant-microbe symbiosis: Mycorrhizal fungi and helper bacteria to improve cold tolerance in rice

文献类型： 外文期刊

作者： Shi, Feng 1 ; He, Xue 1 ; Cao, Meng 1 ; Wu, Ruotong 1 ; Zhang, Bo 5 ; Xu, Tianle 1 ; Jiang, Mingguo 6 ; Song, Fuqiang 1 ;

作者机构： 1.Heilongjiang Univ, Engn Res Ctr Agr Microbiol Technol, Minist Educ, Harbin 150080, Peoples R China

2.Heilongjiang Univ, Heilongjiang Prov Key Lab Ecol Restorat & Resource, Harbin 150080, Peoples R China

3.Heilongjiang Univ, Coll Heilongjiang Prov, Key Lab Microbiol, Harbin 150080, Peoples R China

4.Heilongjiang Univ, Sch Life Sci, Harbin 150080, Peoples R China

5.Heilongjiang Acad Agr Sci, Heilongjiang Acad Black Soil Conservat & Utilizat, Harbin 150086, Peoples R China

6.Guangxi Minzu Univ, Sch Marine Sci & Biotechnol, Guangxi Key Lab Polysaccharide Mat & Modificat, Nanning 530008, Peoples R China

关键词： Funneliformis mosseae; Antioxidant enzymes; Osmotic regulators; Plant hormone; Photosynthesis

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 222 卷

页码：

收录情况： SCI

摘要： Cold stress is a limiting factor for rice yield. Empirical evidence has demonstrated that arbuscular mycorrhizal fungi (AMF) can bolster the cold resilience of plants. In barren environments, AMF can promote host plant growth and resistance. However, whether the addition of mycorrhizal helper bacteria (MHB) can further enhance AMF's ability to improve cold tolerance in plants remains unclear. In this study, we set up an uninoculated group, a separately inoculated group, and a compound inoculated group and incubated rice at 25 degrees C until the three-leaf stage, and then each group was equally divided into four portions for treatment at 25 degrees C, 12 degrees C, 8 degrees C, and 4 degrees C, respectively. The results showed that: (1) Under cold stress conditions, the biomass of rice plants inoculated with AMF was significantly higher than that of the non-inoculated group; (2) AMF and MHB effectively activated the antioxidant enzyme system in rice plants and improved their osmoregulatory capacity under cold stress; (3) The presence of AMF and MHB stimulated and modulated the upregulation of genes related to photosynthesis and cold tolerance in rice plants, thereby enhancing their resilience against cold stress. Our findings corroborate that MHB can further enhance the cold tolerance of rice by promoting the functions of AMF. This study lays the foundation for expanding rice cultivation areas, and ensuring food production security.

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