Interplay of biotic and abiotic factors shapes tree seedling growth and root-associated microbial communities.

Autor: Chamard J; Département de biologie, Université de Sherbrooke, Sherbrooke, QC, Canada.; Centre Sève, Département de Biologie, Université de Sherbrooke, Sherbrooke, QC, Canada.; Centre d'Étude de la Forêt, Université du Québec à Montréal, Montréal, QC, Canada., Faticov M; Département de biologie, Université de Sherbrooke, Sherbrooke, QC, Canada. maria.faticov@gmail.com.; Centre Sève, Département de Biologie, Université de Sherbrooke, Sherbrooke, QC, Canada. maria.faticov@gmail.com.; Centre d'Étude de la Forêt, Université du Québec à Montréal, Montréal, QC, Canada. maria.faticov@gmail.com., Blanchet FG; Département de biologie, Université de Sherbrooke, Sherbrooke, QC, Canada.; Département de mathématiques, Université de Sherbrooke, Sherbrooke, QC, Canada.; Département des sciences de la santé communautaire, Université de Sherbrooke, Sherbrooke, QC, Canada., Chagnon PL; Agriculture and Agri-food Canada, Saint-Jean-sur-Richelieu, QC, Canada.; Département des Sciences Biologiques, Université de Montréal, Montréal, QC, Canada., Laforest-Lapointe I; Département de biologie, Université de Sherbrooke, Sherbrooke, QC, Canada. isabelle.laforest.lapointe@gmail.com.; Centre Sève, Département de Biologie, Université de Sherbrooke, Sherbrooke, QC, Canada. isabelle.laforest.lapointe@gmail.com.; Centre d'Étude de la Forêt, Université du Québec à Montréal, Montréal, QC, Canada. isabelle.laforest.lapointe@gmail.com.
Jazyk: angličtina
Zdroj: Communications biology [Commun Biol] 2024 Mar 22; Vol. 7 (1), pp. 360. Date of Electronic Publication: 2024 Mar 22.
DOI: 10.1038/s42003-024-06042-7
Abstrakt: Root-associated microbes can alleviate plant abiotic stresses, thus potentially supporting adaptation to a changing climate or to novel environments during range expansion. While climate change is extending plant species fundamental niches northward, the distribution and colonization of mutualists (e.g., arbuscular mycorrhizal fungi) and pathogens may constrain plant growth and regeneration. Yet, the degree to which biotic and abiotic factors impact plant performance and associated microbial communities at the edge of their distribution remains unclear. Here, we use root microscopy, coupled with amplicon sequencing, to study bacterial, fungal, and mycorrhizal root-associated microbial communities from sugar maple seedlings distributed across two temperate-to-boreal elevational gradients in southern Québec, Canada. Our findings demonstrate that soil pH, soil Ca, and distance to sugar maple trees are key drivers of root-associated microbial communities, overshadowing the influence of elevation. Interestingly, changes in root fungal community composition mediate an indirect effect of soil pH on seedling growth, a pattern consistent at both sites. Overall, our findings highlight a complex role of biotic and abiotic factors in shaping tree-microbe interactions, which are in turn correlated with seedling growth. These findings have important ramifications for tree range expansion in response to shifting climatic niches.
(© 2024. The Author(s).)
Databáze: MEDLINE
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