Ma Haikun, Liu Jinming, Mo Lidong, Arias-Giraldo Luisa M, Xiang Meichun, Liu Xingzhong
State Key Laboratory of Medicinal Chemical Biology, Key Laboratory of Molecular Microbiology and Technology of the Ministry of Education, Department of Microbiology, College of Life Sciences, Nankai University, Tianjin 300071, China.
Department of Environmental Systems Science, Institute of Integrative Biology, ETH Zurich (Swiss Federal Institute of Technology), Universitätsstrasse 16, Zurich 8092, Switzerland.
ISME Commun. 2024 Jan 10;4(1):ycad015. doi: 10.1093/ismeco/ycad015. eCollection 2024 Jan.
Plants actively recruit microbes from the soil, forming species-specific root microbiomes. However, their relationship with plant adaptations to temperature and precipitation remains unclear. Here we examined the host-selected and conserved microbiomes of 13 native plant species in the Xilingol steppe, Inner Mongolia, a semi-arid region in China. By calculating the global precipitation and temperature niches of these plants, considering plant phylogenetic distances, and analyzing functional traits, we found that these factors significantly influenced the rhizosphere microbiome assembly. We further quantified the strength of host selection and observed that plants with wider precipitation niches exhibited greater host selection strength in their rhizosphere microbiome assembly and higher rhizosphere bacterial diversity. In general, the rhizosphere microbiome showed a stronger link to plant precipitation niches than temperature niches. exhibited consistent responsiveness to host characteristics Our findings offer novel insights into host selection effects and the ecological determinants of wild plant rhizosphere microbiome assembly, with implications for steering root microbiomes of wild plants and understanding plant-microbiome evolution.
植物会主动从土壤中招募微生物，形成物种特异性的根际微生物群。然而，它们与植物对温度和降水的适应性之间的关系仍不明确。在此，我们研究了中国半干旱地区内蒙古锡林郭勒草原13种本土植物的宿主选择型和保守型微生物群。通过计算这些植物的全球降水和温度生态位，考虑植物系统发育距离，并分析功能性状，我们发现这些因素显著影响根际微生物群的组装。我们进一步量化了宿主选择的强度，观察到具有更宽降水生态位的植物在其根际微生物群组装中表现出更强的宿主选择强度和更高的根际细菌多样性。总体而言，根际微生物群与植物降水生态位的联系比与温度生态位的联系更强。对宿主特征表现出一致的响应。我们的研究结果为宿主选择效应以及野生植物根际微生物群组装的生态决定因素提供了新的见解，对调控野生植物的根际微生物群和理解植物-微生物群进化具有重要意义。
