Host specificity of plant-associated bacteria is negatively associated with genome size and host abundance along a latitudinal gradient,Ecology Letters

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Host specificity of plant-associated bacteria is negatively associated with genome size and host abundance along a latitudinal gradient
Ecology Letters ( IF 7.6 ) Pub Date : 2024-06-06 , DOI: 10.1111/ele.14447
Zihui Wang _{1,

2} , Geneviève Lajoie _{3,

4} , Yuan Jiang ₅ , Minhua Zhang ₂ , Chengjin Chu ₅ , Yongfa Chen ₅ , Shuai Fang ₆ , Guangze Jin ₇ , Mingxi Jiang ₈ , Juyu Lian ₉ , Yanpeng Li ₁₀ , Yu Liu ₂ , Keping Ma ₁₁ , Xiangcheng Mi ₁₁ , Xiujuan Qiao ₈ , Xihua Wang ₁₂ , Xugao Wang ₆ , Han Xu ₁₀ , Wanhui Ye ₉ , Li Zhu ₁₁ , Yan Zhu ₁₁ , Fangliang He _{2,

13} , Steven W. Kembel _{1,

2}

Affiliation

Université du Québec à Montréal Montréal Québec Canada
ECNU‐Alberta Joint Lab for Biodiversity Study, Tiantong Forest Ecosystem National Observation and Research Station, School of Ecology and Environmental Sciences East China Normal University Shanghai China
Université de Montréal Montréal Québec Canada
Jardin Botanique de Montréal Montréal Québec Canada
State Key Laboratory of Biocontrol, School of Ecology Sun Yat‐Sen University Guangzhou China
CAS Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology Chinese Academy of Sciences Shenyang China
Center for Ecological Research Northeast Forestry University Harbin China
Key Laboratory of Aquatic Botany and Watershed Ecology, Wuhan Botanical Garden Chinese Academy of Sciences Wuhan China
Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden Chinese Academy of Sciences Guangzhou China
Research Institute of Tropical Forestry Chinese Academy of Forestry Guangzhou China
State Key Laboratory of Vegetation and Environmental Change, Institute of Botany Chinese Academy of Sciences Beijing China
Tiantong Forest Ecosystem National Observation and Research Station, School of Ecology and Environmental Sciences East China Normal University Shanghai China
Department of Renewable Resources University of Alberta Edmonton Alberta Canada

Host specialization plays a critical role in the ecology and evolution of plant–microbe symbiosis. Theory predicts that host specialization is associated with microbial genome streamlining and is influenced by the abundance of host species, both of which can vary across latitudes, leading to a latitudinal gradient in host specificity. Here, we quantified the host specificity and composition of plant–bacteria symbioses on leaves across 329 tree species spanning a latitudinal gradient. Our analysis revealed a predominance of host-specialized leaf bacteria. The degree of host specificity was negatively correlated with bacterial genome size and the local abundance of host plants. Additionally, we found an increased host specificity at lower latitudes, aligning with the high prevalence of small bacterial genomes and rare host species in the tropics. These findings underscore the importance of genome streamlining and host abundance in the evolution of host specificity in plant-associated bacteria along the latitudinal gradient.

中文翻译：

植物相关细菌的宿主特异性与沿纬度梯度的基因组大小和宿主丰度呈负相关

宿主特化在植物-微生物共生的生态和进化中起着至关重要的作用。理论预测，宿主特化与微生物基因组精简有关，并受到宿主物种丰度的影响，两者都可能随纬度变化，导致宿主特异性的纬度梯度。在这里，我们量化了跨越纬度梯度的 329 种树种叶子上植物-细菌共生体的宿主特异性和组成。我们的分析揭示了宿主特异性叶细菌的优势。宿主特异性程度与细菌基因组大小和宿主植物的局部丰度呈负相关。此外，我们发现低纬度地区的宿主特异性有所增加，这与热带地区小细菌基因组和稀有宿主物种的高流行相一致。这些发现强调了基因组精简和宿主丰度在植物相关细菌沿纬度梯度的宿主特异性进化中的重要性。

更新日期：2024-06-07

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