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Wild species rice OsCERK1DY-mediated arbuscular mycorrhiza symbiosis boosts yield and nutrient use efficiency in rice breeding

文献类型： 外文期刊

作者： Han, Ruicai 1 ; Yang, Zhou 1 ; Wang, Chunquan 3 ; Zhu, Shan 1 ; Tang, Guoping 1 ; Shen, Xianhua 1 ; Duanmu, Deqiang 2 ; Cao, Yangrong 2 ; Huang, Renliang 1 ;

作者机构： 1.Jiangxi Acad Agr Sci, Rice Res Inst, Nanchang Subctr Natl Res Ctr Rice Engn, Key Lab Rice Physiol & Genet Jiangxi Prov, Nanchang 330200, Peoples R China

2.Huazhong Agr Univ, Coll Life Sci & Technol, Natl Key Lab Agr Microbiol, Hubei Hongshan Lab, Wuhan 430070, Peoples R China

3.Jiangxi Biotech Vocat Coll, Nanchang 330200, Peoples R China

关键词： OsCERK1; Natural variation; Arbuscular mycorrhizal; Rice yield

期刊名称：MOLECULAR BREEDING （ 影响因子：3.1； 五年影响因子：3.1 ）

ISSN： 1380-3743

年卷期： 2024 年 44 卷 3 期

页码：

收录情况： SCI

摘要： Meeting the ever-increasing food demands of a growing global population while ensuring resource and environmental sustainability presents significant challenges for agriculture worldwide. Arbuscular mycorrhizal symbiosis (AMS) has emerged as a potential solution by increasing the surface area of a plant's root system and enhancing the absorption of phosphorus, nitrogen nutrients, and water. Consequently, there is a longstanding hypothesis that rice varieties exhibiting more efficient AMS could yield higher outputs at reduced input costs, paving the way for the development of Green Super Rice (GSR). Our prior research study identified a variant, OsCERK1(DY), derived from Dongxiang wild-type rice, which notably enhanced AMS efficiency in the rice cultivar "ZZ35." This variant represents a promising gene for enhancing yield and nutrient use efficiency in rice breeding. In this study, we conducted a comparative analysis of biomass, crop growth characteristics, yield attributes, and nutrient absorption at varying soil nitrogen levels in the rice cultivar "ZZ35" and its chromosome single-segment substitution line, "GJDN1." In the field, GJDN1 exhibited a higher AM colonization level in its roots compared with ZZ35. Notably, GJDN1 displayed significantly higher effective panicle numbers and seed-setting rates than ZZ35. Moreover, the yield of GJDN1 with 75% nitrogen was 14.27% greater than the maximum yield achieved using ZZ35. At equivalent nitrogen levels, GJDN1 consistently outperformed ZZ35 in chlorophyll (Chl) content, dry matter accumulation, major nutrient element accumulation, N agronomic efficiency (NAE), N recovery efficiency (NRE), and N partial factor productivity (NPFP). The performance of OsCERK1(DY) overexpression lines corroborated these findings. These results support a model wherein the heightened level of AMS mediated by OsCERK1(DY) contributes to increased nitrogen, phosphorus, and potassium accumulation. This enhancement in nutrient utilization promotes higher fertilizer efficiency, dry matter accumulation, and ultimately, rice yield. Consequently, the OsCERK1(DY) gene emerges as a robust candidate for improving yield, reducing fertilizer usage, and facilitating a transition towards greener, lower-carbon agriculture.

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