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Published on: July 24, 2018
Deciphering Conserved Rhizosphere Metabolite-Microbiome Interactions for Crop Drought Resistance.
Guoqing Niu1, Weiye Liu1, Tianjiao Zhang1
1Jiangsu Provincial Key Lab for Organic Solid Waste Utilization, Jiangsu Collaborative Innovation Center for Solid Organic Wastes, Educational Ministry Engineering Center of Resource-Saving Fertilizers, Nanjing Agricultural University, Nanjing, China.
Conserved soil microbes enhance crop drought resistance. Specific metabolites like trehalose, myo-inositol, and phenylalanine recruit these microbes, improving plant growth and water content under drought stress.
Area of Science:
- Microbiology
- Plant Science
- Soil Science
Background:
- Drought stress significantly threatens global food security.
- The role of conserved drought-responsive microbes in crop adaptation remains unclear.
Purpose of the Study:
- Identify drought-responsive microbial genera conserved across multiple crop species.
- Elucidate the in situ regulatory mechanisms of these microbes under drought.
Main Methods:
- Integrated amplicon sequencing of rhizosphere microbiomes from 26 crop species.
- Soil conditioning experiments using shared rhizosphere metabolites.
- Greenhouse trials and field studies with tomato, cucumber, watermelon, and sorghum.
Main Results:
- Six core genera (Streptomyces, Glycomyces, Inquilinus, Amycolatopsis, Acinetobacter, Promicromonospora) were consistently enriched under drought.
- Trehalose, myo-inositol, and phenylalanine synergistically enriched these genera.
- Conditioned soil significantly increased root length and leaf water content in crops.
Conclusions:
- A conserved rhizosphere metabolite-microbiome interaction exists across multiple crops.
- This interaction enhances drought resistance by recruiting beneficial microbes.
- Findings offer a strategy to steer soil microbiomes for improved drought resilience.
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