Host specificity of plant-associated bacteria is negatively associated with genome size and host abundance along a latitudinal gradient.
Ecol Lett
; 27(6): e14447, 2024 Jun.
Article
em En
| MEDLINE
| ID: mdl-38844351
ABSTRACT
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.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Simbiose
/
Folhas de Planta
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Especificidade de Hospedeiro
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Tamanho do Genoma
Idioma:
En
Revista:
Ecol Lett
Ano de publicação:
2024
Tipo de documento:
Article
País de afiliação:
Canadá