Iron limitation-induced endophytic Ammoniphilus assemblage promotes root apoplastic iron remobilization by attenuation of salicylic acid pathways
文献类型： 外文期刊
作者： Zhu, Lin 1 ; Zhang, Aijing 1 ; Guo, Jiansheng 3 ; Liu, Huabing 1 ; Xie, Yue 1 ; Lu, Xiaomin 1 ; Yan, Congsheng 4 ; Wang, Jianfei 1 ; Zhou, Cheng 5 ;
作者机构： 1.Anhui Sci & Technol Univ, Coll Biomed & Hlth Sci, Key Lab Bioorgan Fertilizer Creat, Minist Agr & Rural Affairs, Chuzhou, Peoples R China
2.Tongji Univ, Sch Life Sci & Technol, Shanghai, Peoples R China
3.Zhejiang Univ, Sch Med, Hangzhou, Peoples R China
4.Anhui Acad Agr Sci, Inst Hort, Hefei, Peoples R China
5.Nanjing Agr Univ, Jiangsu Collaborat Innovat Ctr Solid Organ Wastes, Educ Minist Engn Ctr Resource Saving Fertilizers, Jiangsu Prov Key Lab Solid Organ Waste Utilizat, Nanjing, Peoples R China
期刊名称：NPJ BIOFILMS AND MICROBIOMES （ 影响因子：9.2； 五年影响因子：9.9 ）
ISSN：
年卷期： 2025 年 11 卷 1 期
页码：
收录情况： SCI
摘要： Plants establish symbiotic associations with root-colonizing microbes to adapt to adverse conditions. However, how root-associated microbiota interacted with their hosts to improve plant growth under nutrient deficient conditions remains poorly understood. In this study, we explored an interaction between tomato plants and root-associated microbiota under iron (Fe) limitation, mediated by bacterial secretion of glutamine. 16S rRNA gene sequencing revealed that Fe-limited conditions altered the composition of root-associated microbiomes, resulting in the enrichment of Ammoniphilus sp. This taxon was isolated and shown to alleviate Fe deficiency symptoms. Moreover, Fe deficiency triggered salicylic acid (SA)-induced hydrogen peroxide (H2O2) burst, thereby inhibiting the exudation of Fe-mobilizing phenolics from the roots. However, bacterial secretion of Gln greatly attenuated the SA-induced H2O2 production in the roots, thereby enhancing bacterial colonization and promoting apoplastic Fe remobilization. Collectively, these results underscored a microbial strategy for orchestrating plant SA pathways to facilitate the reutilization of root apoplastic Fe.
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