Drought Tolerance Traits in Neotropical Trees Correlate with the Composition of Phyllosphere Fungal Communities

Plant-associated microorganisms have been shown to aid plants in coping with drought. However, the underlying mechanisms are poorly understood and there is uncertainty regarding which microbial taxa and functions are mostly involved. We explored these issues in Neotropical rainforests and identified...

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Published in:Phytobiomes journal 2023-09, Vol.7 (2), p.244-258
Main Authors: Cambon, Marine C., Cartry, Dinïa, Chancerel, Emilie, Ziegler, Camille, Levionnois, Sebastien, Coste, Sabrina, Stahl, Clément, Delzon, Sylvain, Buée, Marc, Burban, Benoit, Cazal, Jocelyne, Fort, Tania, Goret, Jean-Yves, Heuret, Patrick, Léger, Patrick, Louisanna, Elianne, Ritter, Yves, Bonal, Damien, Roy, Mélanie, Schimann, Heidy, Vacher, Corinne
Format: Article
Language:English
Subjects:
abiotic stressors
bacterial communities
Biodiversity and Ecology
drought tolerance
Environmental Sciences
fungal communities
Global Changes
microbiota
phyllosphere
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Summary:Plant-associated microorganisms have been shown to aid plants in coping with drought. However, the underlying mechanisms are poorly understood and there is uncertainty regarding which microbial taxa and functions are mostly involved. We explored these issues in Neotropical rainforests and identified foliar microorganisms that may play a role in drought tolerance of trees. Our objectives were to (i) test the relationship between drought tolerance traits in Neotropical trees and the diversity and composition of their foliar fungal and bacterial communities and (ii) identify leaf microbial taxa positively or negatively associated with drought tolerance traits. Our results showed that the composition of leaf fungal communities but not bacterial communities was related to drought tolerance. We identified 27 fungal amplicon sequence variants whose relative abundance covaried with drought tolerance traits. Most variants were assigned to fungal clades often described as plant pathogens and increased in abundance with drought susceptibility. This greater relative abundance of leaf pathogens in the most drought-susceptible trees might increase their vulnerability to climate change. Moreover, we identified the Strelitziana and Ochroconis fungal genera as potential candidates for future culture-dependent studies aimed at understanding and improving drought tolerance in Neotropical forests. [Formula: see text] Copyright © 2022 The Author(s). This is an open access article distributed under the CC BY-NC-ND 4.0 International license .
ISSN:2471-2906
2471-2906
DOI:10.1094/PBIOMES-04-22-0023-R