文献类型： 外文期刊

作者： Xiao, Xun ¹ ; Liu, Kai Lou ¹ ; Shen, Yi ³ ; Dai, Wen Tai ¹ ; Liu, Shu Han ¹ ; Shen, Ren Fang ¹ ; Zhao, Xue Qiang ¹ ;

作者机构： 1.Chinese Acad Sci, Inst Soil Sci, State Key Lab Soil & Sustainable Agr, Nanjing 210008, Peoples R China

2.Jiangxi Inst Red Soil & Germplasm Resources, Natl Engn & Technol Res Ctr Red Soil Improvement, Nanchang 331717, Peoples R China

3.Jiangsu Acad Agr Sci, Inst Ind Crops, Nanjing 210014, Peoples R China

4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China

关键词： Peanut genotypes; Acid soil tolerance; Rhizobacterial community; Co-occurrence network; Acidic soil

期刊名称：FIELD CROPS RESEARCH （ 影响因子：6.4； 五年影响因子：6.6 ）

ISSN： 0378-4290

年卷期： 2025 年 322 卷

页码：

收录情况： SCI

摘要： Context or problem: Developing stress-tolerant plants continues to be the goal of breeders due to their realized yields and stability. The rhizosphere microbiome is a central determinant of plant tolerance to soil environmental stress, but the association between genotypic differences in peanut (Arachis hypogaea L.) stress tolerance and rhizobacterial community patterns remains unclear in acidic soils. Objective or research question: We aim to screen the acid soil-tolerant peanut varieties and explore the relationship between rhizobacterial community patterns and peanut acid soil tolerance. Methods: A two-year field trial was conducted during 2022-2023. In 2022, We grew 27 peanut varieties in two experimental fields with different initial soil pHs (4.70 and 5.58), and screened four acidic soil-tolerant and 4 acidic soil-sensitive peanut varieties. In 2023, we replanted the screened eight peanut varieties in the pH 4.70 field. Bulk and rhizosphere soil samples were collected to analyze the soil chemical properties and bacterial community patterns of different genotypic peanuts. Results: The four acidic soil-tolerant peanuts had lower exchangeable aluminum content and higher pH and exchangeable calcium contents in the rhizosphere soils in the pH 4.70 field relative to the acid soil-sensitive peanuts. These differences in the rhizosphere chemical properties further caused distinct rhizosphere bacterial communities of acid soil-tolerant peanuts from acid soil-sensitive peanuts. The acid soil-tolerant peanuts had much higher relative abundance of ASVs (Amplicon Sequence Variants) related to carbon and nitrogen transformation, while the acid soil-sensitive peanuts formed a more complex co-occurrence network by exacerbating the competition between ASVs. Further, the acid soil-tolerant peanuts harbored a higher relative abundance of positive keystone (Sphingomona) and a lower relative abundance of negative keystone (IMCC26256, Elsterales, and WPS_2) than the acid soil-sensitive peanuts. These differences between the acid soil-tolerant and acid soil- sensitive peanuts were observed only in the rhizosphere soils of the pH 4.70 field but not in the bulk soils or the pH 5.58 field. Conclusion: Peanut genotypic stress tolerance imprints the rhizobacterial community and association network patterns. Implications or significance: Our findings provided resistant cultivar resources for peanut cultivation and breeding in acidic soils and highlighted the rhizobacterial community and association network patterns as indicators of genotypic peanut stress tolerance in acid soil.