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Growth substrates alter aboveground plant microbial and metabolic properties thereby influencing insect herbivore performance

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Science China(Life Sciences) 2023年第8期66卷 1728-1741页

作者： Jun Yuan Tao Wen Shengdie Yang Chao Zhang Mengli Zhao Guoqing Niu Penghao Xie Xiaoyu Liu Xinyuan Zhao Qirong Shen T.Martijn Bezemer The Key Laboratory of Plant Immunity Jiangsu Provincial Key Lab for Organic Solid Waste UtilizationJiangsu Collaborative Innovation Center for Solid Organic WastesEducational Ministry Engineering Center of Resource-saving fertilizersNanjing Agricultural UniversityNanjing 210095China Institute of Biology Above-Belowground Interactions groupLeiden UniversityP.O.Box 95052300 RA LeidenThe Netherlands Department of Terrestrial Ecology Netherlands Institute of EcologyP.O.Box 506700 AB WageningenThe Netherlands

The gut microbiome of plant-eaters is affected by the food they eat,but it is currently unclear how the plant metabolome and microbiome are influenced by the substrate the plant grows in and how this subsequently impacts the feeding behavior and gut microbiomes of insect herbivores.Here,we use Plutella xylostella caterpillars and show that the larvae prefer leaves of cabbage plants growing in a vermiculite substrate to those from plants growing in conventional soil systems.From a plant metabolomics analysis,we identified 20 plant metabolites that were related to caterpillar feeding performance.In a bioassay,the effects of these plant metabolites on insects'feeding were tested.Nitrate and compounds enriched with leaves of soilless cultivation promoted the feeding of insects,while compounds enriched with leaves of plants growing in natural soil decreased feeding.Several microbial groups(e.g.,Sporolactobacillus,Haliangium)detected inside the plant correlated with caterpillar feeding performance and other microbial groups,such as Ramlibacter and Methylophilus,correlated with the gut microbiome.Our results highlight the role of growth substrates on the food metabolome and microbiome and on the feeding performance and the gut microbiome of plant feeders.It illustrates how belowground factors can influence the aboveground properties of plant-animal systems,which has important implications for plant growth and pest control.

关键词： cultivation pattern gut microbiome herbivory leaf microbiome leaf metabolome

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