Drought tolerance traits in Neotropical trees correlate with the composition of phyllosphere fungal communities

IF 3.3 3区 生物学 Q2 MICROBIOLOGY Phytobiomes Journal Pub Date : 2022-06-01 DOI:10.1094/pbiomes-04-22-0023-r
Marine C. Cambon, D. Cartry, É. Chancerel, Camille Ziegler, Sébastien Levionnois, S. Coste, C. Stahl, S. Delzon, M. Buée, B. Burban, Jocelyn Cazal, Tania Fort, Jean-Yves Goret, P. Heuret, P. Léger, Elianne Louisanna, Yves Ritter, D. Bonal, M. Roy, H. Schimann, C. Vacher
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引用次数: 2

Abstract

Plant-associated microorganisms have 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 (1) test the relationship between drought tolerance traits in Neotropical trees and the diversity and composition of their foliar fungal and bacterial communities and (2) 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 (ASVs) whose relative abundance co-varied 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.
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新热带树木的耐旱性与叶际真菌群落的组成相关
与植物相关的微生物已被证明有助于植物应对干旱。然而,人们对其潜在机制知之甚少,并且不确定哪些微生物类群和功能主要涉及其中。我们在新热带雨林中探讨了这些问题,并确定了可能在树木耐旱性中发挥作用的叶面微生物。我们的目标是(1)测试新热带树木的耐旱性特征与其叶片真菌和细菌群落的多样性和组成之间的关系,以及(2)确定与耐旱性特征呈正相关或负相关的叶片微生物类群。我们的研究结果表明,叶片真菌群落的组成与耐旱性有关,而细菌群落的组成则与耐旱性无关。我们鉴定了27个真菌扩增子序列变异株(ASVs),其相对丰度与耐旱性性状共同变化。大多数变种都属于真菌分支,通常被描述为植物病原体,并且随着干旱敏感性的增加,其丰度增加。在最易干旱的树木中,叶片病原体的相对丰度更高,可能会增加它们对气候变化的脆弱性。此外,我们确定Strelitziana和Ochroconis真菌属是未来培养依赖性研究的潜在候选者,旨在了解和提高新热带森林的耐旱性。
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来源期刊
CiteScore
7.40
自引率
6.80%
发文量
42
审稿时长
4 weeks
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