Multitrophic interactions in the rhizosphere microbiome of wheat: from bacteria and fungi to protists.
Multitrophic interactions in the rhizosphere microbiome of wheat: from bacteria and fungi to protists.
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DOI：
10.1093/femsec/fiaa032
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发表时间：
2020-03
影响因子：
4.2
通讯作者：
Maike Rossmann;J. Perez-Jaramillo;V. N. Kavamura;J. Chiaramonte;K. Dumack;A. Fiore-Donno;L. Mendes;Márcia M. C. Ferreira;M. Bonkowski;J. Raaijmakers;T. Mauchline;R. Mendes
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文献类型：
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作者：
Maike Rossmann;J. Perez-Jaramillo;V. N. Kavamura;J. Chiaramonte;K. Dumack;A. Fiore-Donno;L. Mendes;Márcia M. C. Ferreira;M. Bonkowski;J. Raaijmakers;T. Mauchline;R. Mendes
植物通过根系分泌物调节土壤微生物区系，使根际微生物组与跨越不同营养水平的生物体形成复合体。在这里，我们评估了地方品种和现代品种的小麦中细菌，真菌和尾虫群落的多样性。每组中的优势类群是细菌门变形菌门、放线菌门和酸杆菌门;真菌门子囊菌门、壶菌门和担子菌门;以及尾藻纲肉单胞菌门、丝状菌门和覆瓦菌门。我们发现，小麦地方品种的微生物网络形成了一个更复杂的网络拓扑结构比现代小麦品种，这表明育种选择导致在根际招募特定微生物的能力降低。某些尾虫类群与细菌和真菌的高度连接性表明了某些捕食者比其他捕食者获得优势的营养网络等级。原生生物和地方品种中的细菌之间的正相关性被保存为一个子集，在品种的情况下，肉单胞菌类与放线菌。在我们的研究结果中观察到的微生物组结构和植物基因型之间的相关性表明，由营养水平较高的生物体进行自上而下的控制是理解根际微生物组群落组装驱动因素的关键因素。
Plants modulate the soil microbiota by root exudation assembling a complex rhizosphere microbiome with organisms spanning different trophic levels. Here, we assessed the diversity of bacterial, fungal and cercozoan communities in landraces and modern varieties of wheat. The dominant taxa within each group were the bacterial phyla Proteobacteria, Actinobacteria and Acidobacteria; the fungi phyla Ascomycota, Chytridiomycota and Basidiomycota; and the Cercozoa classes Sarcomonadea, Thecofilosea and Imbricatea. We showed that microbial networks of the wheat landraces formed a more intricate network topology than that of modern wheat cultivars, suggesting that breeding selection resulted in a reduced ability to recruit specific microbes in the rhizosphere. The high connectedness of certain cercozoan taxa to bacteria and fungi indicated trophic network hierarchies where certain predators gain predominance over others. Positive correlations between protists and bacteria in landraces were preserved as a subset in cultivars as was the case for the Sarcomonadea class with Actinobacteria. The correlations between the microbiome structure and plant genotype observed in our results suggest the importance of top-down control by organisms of higher trophic levels as a key factor for understanding the drivers of microbiome community assembly in the rhizosphere.