文献类型： 外文期刊

作者： Xu, Feiyun ¹ ; Wang, Yongsen ¹ ; Yang, Jinyong ¹ ; Zhang, Xue ¹ ; Wang, Ke ³ ; Ding, Fan ⁴ ; Pang, Jiayin ⁵ ; Tong, Lu ¹ ; Bai, Chuqi ¹ ; Chen, Shu ¹ ; Sun, Leyun ¹ ; Du, Chongxuan ¹ ; Fang, Ju ¹ ; Xu, Mengqiang ⁴ ; Li, Liang ⁴ ; Yu, Xin ⁶ ; Gengli, Jiahong ¹ ; Liu, Jianping ¹ ; Zhang, Qian ⁴ ; Wang, Zhengrui ⁴ ; Zhu, Yiyong ⁶ ; Zhang-Zheng, Huanyuan ⁷ ; Zhang, Jianhua ⁹ ; Xu, Weifeng ¹ ;

作者机构： 1.Fujian Agr & Forestry Univ, Ctr Plant Water Use & Nutr Regulat, State Key Lab Agr & Forestry Biosecur, Coll JunCao Sci & Ecol, Fuzhou 350002, Peoples R China

2.Nanjing Univ, Sch Life Sci, Dept Ecol, Nanjing 210000, Peoples R China

3.Fujian Acad Agr Sci, Inst Resources Environm & Soil Fertilizer, Fuzhou 350013, Peoples R China

4.Fujian Agr & Forestry Univ, Coll Resources & Environm, Fuzhou 350002, Peoples R China

5.Univ Western Australia, UWA Inst Agr, Perth, WA 6009, Australia

6.Nanjing Agr Univ, Coll Resources & Environm Sci, Jiangsu Collaborat Innovat Ctr Solid Organ Waste R, Nanjing 210095, Peoples R China

7.Univ Oxford, Environm Change Inst, Sch Geog & Environm, Oxford OX12JD, England

8.Univ Oxford, Leverhulme Ctr Nat Recovery, Oxford OX12JD, England

9.Chinese Univ Hong Kong, State Key Lab Agrobiotechnol, Shenzhen 518172, Peoples R China

关键词： polyploidy; pseudomonas; rhizosheath formation; rice; soil drying

期刊名称：ADVANCED SCIENCE （ 影响因子：14.1； 五年影响因子：15.6 ）

ISSN：

年卷期： 2025 年

页码：

收录情况： SCI

摘要： Rhizosheath formation is facilitated by root hair length, root exudates, the soil microbes, which collectively enhance plant resistance to drought. This process partly results from the complex interaction between root exudates and microbes, a relationship that remains poorly understood. The roles of root exudates and microbes in rhizosheath formation in rice under soil drying (SD) conditions are investigated. In tetraploid rice, rhizosheath formation under SD is approximately 70% greater than in diploid rice. Inoculation of diploid rice with the rhizosheath soil microbiota from tetraploid rice significantly enhanced rhizosheath formation under SD. The bacterial genus Pseudomonas is identified as the key taxon promoting rhizosheath formation in tetraploid rice under SD. Tetraploid rice exhibits significantly higher root flavonoid concentration than diploid rice under SD. Overexpression of the chalcone synthase gene (OsCHS1), a key gene involved in flavonoid biosynthesis, led to a significant increase in the abundance of Pseudomonadaceae in diploid rice. Pseudomonas nitroreducens, isolated from the rhizosheath of tetraploid rice, demonstrates chemotactic attraction to flavonoids, but this behavior is not observed in histidine kinase mutant Delta cheA. Diploid and tetraploid rice inoculated with P. nitroreducens and IAA biosynthesis complemented strain Delta iaaM-c formed larger rhizosheath under SD than those inoculated with its IAA biosynthesis mutant Delta iaaM. These results suggest that auxin-producing Pseudomonas, recruited by root flavonoids, enhances rice rhizosheath formation through the bacterial histidine kinase under SD. This finding may facilitate the improvement of environmental adaptation in polyploidy crops by regulating their interactions with beneficial soil microorganisms.