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

被引：0

作者：

Wang, Zihui ^{[1
,2
]}

Lajoie, Genevieve ^{[3
,4
]}

Jiang, Yuan ^{[5
]}

Zhang, Minhua ^{[2
]}

Chu, Chengjin ^{[5
]}

Chen, Yongfa ^{[5
]}

Fang, Shuai ^{[6
]}

Jin, Guangze ^{[7
]}

Jiang, Mingxi ^{[8
]}

Lian, Juyu ^{[9
]}

Li, Yanpeng ^{[10
]}

Liu, Yu ^{[2
]}

Ma, Keping ^{[11
]}

Mi, Xiangcheng ^{[11
]}

Qiao, Xiujuan ^{[8
]}

Wang, Xihua ^{[12
]}

Wang, Xugao ^{[6
]}

Xu, Han ^{[10
]}

Ye, Wanhui ^{[9
]}

Zhu, Li ^{[11
]}

Zhu, Yan ^{[11
]}

He, Fangliang ^{[2
,13
,15
]}

Kembel, Steven W. ^{[1
,2
,14
]}

机构：

[1] Univ Quebec Montreal, Montreal, PQ, Canada

[2] East China Normal Univ, Sch Ecol & Environm Sci, ECNU Alberta Joint Lab Biodivers Study, Tiantong Forest Ecosyst Natl Observat & Res Stn, Shanghai, Peoples R China

[3] Univ Montreal, Montreal, PQ, Canada

[4] Jardin Bot Montreal, Montreal, PQ, Canada

[5] Sun Yat Sen Univ, Sch Ecol, State Key Lab Biocontrol, Guangzhou, Peoples R China

[6] Chinese Acad Sci, CAS Key Lab Forest Ecol & Management, Inst Appl Ecol, Shenyang, Peoples R China

[7] Northeast Forestry Univ, Ctr Ecol Res, Harbin, Peoples R China

[8] Chinese Acad Sci, Wuhan Bot Garden, Key Lab Aquat Bot & Watershed Ecol, Wuhan, Peoples R China

[9] Chinese Acad Sci, Key Lab Vegetat Restorat & Management Degraded Eco, South China Bot Garden, Guangzhou, Peoples R China

[10] Chinese Acad Forestry, Res Inst Trop Forestry, Guangzhou, Peoples R China

[11] Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing, Peoples R China

[12] East China Normal Univ, Sch Ecol & Environm Sci, Tiantong Forest Ecosyst Natl Observat & Res Stn, Shanghai, Peoples R China

[13] Univ Alberta, Dept Renewable Resources, Edmonton, AB, Canada

[14] SB-2130,141 Ave President Kennedy, Montreal, PQ H2X1Y4, Canada

[15] 322A,11328-89 Ave NW, Edmonton, AB T6G 2J7, Canada

来源：

ECOLOGY LETTERS | 2024年 / 27卷 / 06期

基金：

加拿大自然科学与工程研究理事会;

关键词：

dispersal; genome streamlining; host abundance; host specialization; latitudinal gradients of host specificity; phyllosphere bacteria; FUNCTIONAL TRAITS; BEE GUT; SPECIALIZATION; DIVERSITY; MICROBIOME; EVOLUTION; PACKAGE;

D O I：

暂无

中图分类号：

Q14 [生态学（生物生态学）];

学科分类号：

071012 ; 0713 ;

摘要：

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. Our study provided empirical evidence for three fundamental predictions regarding the mechanisms of host specialization in plant-bacteria symbiosis, by a comprehensive assessment of the host specificity in leaf-associated bacteria along a latitudinal gradient. We revealed negative effects of genome size and host species abundance on the host specificity of leaf bacteria, consistent with the expectation that host specialization is accompanied by genome streamlining and is influenced by host abundance. Additionally, we demonstrated an increased host specificity at lower latitudes, in line with the decreased bacterial genome size and increased prevalence of rare host species in the tropics. These findings highlighted the interplay among host specificity, genome streamlining and host plant abundance in driving the latitudinal diversity gradient of plant-bacteria symbioses.image

引用

页数：12

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