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Mycorrhizal symbiosis modulates the rhizosphere microbiota to promote rhizobia–legume symbiosis

Molecular Plant 2021年第3期14卷 503-516页

作者： Xiaolin Wang Huan Feng Yayu Wang Mingxing Wang Xingguang Xie Huizhong Chang Like Wang Jicheng Qu Kai Sun Wei He Chunyan Wang Chuanchao Dai Zhaohui Chu Changfu Tian Nan Yu Xuebin Zhang Huan Liu Ertao Wang National Key Laboratory of Plant Molecular Genetics Chinese Academy of Sciences Center for Excellence in Molecular Plant SciencesInstitute of Plant Physiology and EcologyShanghai Institutes for Biological SciencesChinese Academy of SciencesShanghai 200032China Shanghai Key Laboratory of Plant Molecular Sciences College of Life SciencesShanghai Normal UniversityShanghai 200234China College of Forestry Northwest A&F UniversityYangling 712100China State Key Laboratory of Agricultural Genomics BGI-ShenzhenShenzhen 518083China Jiangsu Key Laboratory for Microbes and Functional Genomics Jiangsu Engineering and Technology Research Center for Industrialization of Microbial ResourcesCollege of Life SciencesNanjing Normal UniversityNanjing 210023China State Key Laboratory of Crop Biology College of AgronomyShandong Agricultural UniversityTaianChina Shanghai Hanyubio Co. LtdShanghai 201201China State Key Laboratory of Agrobiotechnology College of Biological SciencesChina Agricultural UniversityBeijing 100193China Center for Multi-Omics Research Collaborative Innovation Center of Crop Stress BiologyHenan ProvinceKaifeng 475001China institute of Plant Stress Biology State Key Laboratory of Cotton BiologyDepartment of BiologyHenan UniversityKaifeng 475001China

Plants establish symbioses with mutualistic fungi,such as arbuscular mycorrhizal(AM)fungi,and bacteria,such as rhizobia,to exchange key nutrients and thrive.Plants and symbionts have coevolved and represent vital components of terrestrial ecosystems.Plants employ an ancestral AM signaling pathway to establish intracellular symbioses,including the legume–rhizobia symbiosis,in their roots.Nevertheless,the relationship between the AM and rhizobial symbioses in native soil is poorly understood.Here,we examined how these distinct symbioses affect root-associated bacterial communities in Medicago truncatula by performing quantitative microbiota profiling(QMP)of 16S rRNA genes.We found that M.truncatula mutants that cannot establish AM or rhizobia symbiosis have an altered microbial load(quantitative abundance)in the rhizosphere and roots,and in particular that AM symbiosis is required to assemble a normal quantitative root-associated microbiota in native soil.Moreover,quantitative microbial co-abundance network analyses revealed that AM symbiosis affects Rhizobiales hubs among plant microbiota and benefits the plant holobiont.Through QMP of rhizobial rpoB and AM fungal SSU rRNA genes,we revealed a new layer of interaction whereby AM symbiosis promotes rhizobia accumulation in the rhizosphere of M.truncatula.We further showed that AM symbiosis-conditioned microbial communities within the M.truncatula rhizosphere could promote nodulation in different legume plants in native soil.Given that the AM and rhizobial symbioses are critical for crop growth,our findings might inform strategies to improve agricultural management.Moreover,our work sheds light on the co-evolution of these intracellular symbioses during plant adaptation to native soil conditions.

关键词： arbuscular mycorrhizae rhizobia symbiosis rhizosphere microbiota quantitative microbiota profiling rpoB

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Enhanced Nitrogen and Phosphorus Activation with an Optimized Bacterial Community by Endophytic Fungus Phomopsis liquidambari in Paddy Soil

Enhanced Nitrogen and Phosphorus Activation with an Optimize...

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中国植物学会第十六次全国会员代表大会暨85周年学术年会

作者： Mengjun Tang Qiang Zhu Fengmin Zhang Wei Zhang Jie Yuan Kai Sun Fangji Xu Chuanchao Dai Jiangsu Key Laboratory for Microbes and Functional Genomics Jiangsu Engineering and Technology Research Center for Industrialization of Microbial ResourcesCollege of Life SciencesNanjing Normal University

The endophytic fungus Phomopsis liquidambari play a key role in habitat adaptation of rice(Oryza sativa L.) with potential multiple beneficial.However,our previous published work on this subject remains incomplete.Here,we performed a soil nutrient(nitrogen and phosphorus) transformation with related functional genes and elucidated how rhizosphere microbiota vary their response to P.liquidambari interaction throughout the plant’s life cycle under field conditions by Illumina Miseq sequencing platforms in a nutrient-limited paddy soil.Our results showed that P.liquidambari symbiosis decreased the nitrogen and phosphorus loss by 531.24 mg and 558.12 mg per pot,respectively.Additionally,we suggest that the application of P.liquidambari altered the activation of soil nitrogen and phosphorus functional genes to accelerate nutrient turnover in the rice rhizosphere.High-throughput sequencing with cooccurrence network and species-related network analysis further revealed that P.liquidambari colonization influenced the patterns of microbiota shift in the rhizosphere,especially during the heading stages.This led to an optimized microbial community through the promotion and inhibition of indigenous soil microbes with a higher level of available nutrient supplies.Our study strongly proposes rice-P.liquidambari symbiosis as a useful candidate for improving N and P acquisition and utilization.

关键词： rhizosphere microbiota whole developmental stages fungal endophyte network analysis rice soil nutrient

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