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Arbuscular Mycorrhizal Fungi Mediate the Acclimation of Rice to Submergence

文献类型： 外文期刊

作者： Xu, Yanggui 1 ; Tu, Yuting 1 ; Feng, Jiayi 4 ; Peng, Zhiping 1 ; Peng, Yiping 1 ; Huang, Jichuan 1 ;

作者机构： 1.Guangdong Acad Agr Sci, Inst Agr Resources & Environm, Guangzhou 510640, Peoples R China

2.Minist Agr, Key Lab Plant Nutr & Fertilizer South Reg, Guangzhou 510640, Peoples R China

3.Guangdong Key Lab Nutrient Cycling & Farmland Cons, Jinying Rd, Guangzhou 510640, Peoples R China

4.Guangdong Ecoengn Polytech, Guangzhou 510520, Peoples R China

关键词： carbohydrates; lipids; fungal perception; root morphological traits; flooding stress; submergence-related genes

期刊名称：PLANTS-BASEL （ 影响因子：4.0； 五年影响因子：4.4 ）

ISSN： 2223-7747

年卷期： 2024 年 13 卷 14 期

页码：

收录情况： SCI

摘要： Flooding is a critical factor that limits the establishment of a symbiosis between rice and arbuscular mycorrhizal fungi (AMF) in wetland ecosystems. The distribution of carbon resources in roots and the acclimation strategies of rice to flooding stress in the presence of AMF are poorly understood. We conducted a root box experiment, employing nylon sheets or nylon meshes to create separate fungal chambers that either prevented or allowed the roots and any molecules to pass through. We found that the mycorrhizal colonization rate and the expression of genes OsD14L and OsCERK1, which are involved in fungal perception during symbiosis, both increased in mycorrhizal rice roots following intermittent flooding compared to continuous flooding. Furthermore, AMF inoculation affected root morphological traits, facilitating both shallower and deeper soil exploration. Increased submergence intensity led to carbohydrate deprivation in roots, while high mycorrhizal colonization increased soil oxygen consumption and decreased the neutral lipid concentration in roots. However, mycorrhizal inoculation increased the rice photosynthesis rate and facilitated acclimation to submergence by mediating the expression of the genes OsCIPK15 and OsSUB1A to enhance rice shoot elongation and the sugar concentration in roots as a result of reduced competition for carbon between rice and AMF under different flooding conditions.

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