研究人员表明,当面临干旱、高温或低温压力时,接种了来自更干燥、更温暖或更寒冷地区的微生物群落的树苗分别显示出更高的存活率。微生物介导的耐旱性与丛枝菌根真菌的多样性增加有关,而耐寒性与较低的真菌丰富度有关,可能反映了非适应性真菌分类群的负担减少。了解微生物介导的气候耐受性可能会提高人类预测和管理森林生态系统对气候变化适应性的能力。
据介绍,气候变化正在将物种推到其演化的容忍范围之外。植物种群必须适应、调整或迁移以避免灭绝。然而,由于植物与塑造其表型的各种微生物群落相关联,微生物群落的变化可能提供了气候耐受性的替代来源。
附:英文原文
Title: Shifting microbial communities can enhance tree tolerance to changing climates
Author: Cassandra M. Allsup, Isabelle George, Richard A. Lankau
Issue&Volume: 2023-05-26
Abstract: Climate change is pushing species outside of their evolved tolerances. Plant populations must acclimate, adapt, or migrate to avoid extinction. However, because plants associate with diverse microbial communities that shape their phenotypes, shifts in microbial associations may provide an alternative source of climate tolerance. Here, we show that tree seedlings inoculated with microbial communities sourced from drier, warmer, or colder sites displayed higher survival when faced with drought, heat, or cold stress, respectively. Microbially mediated drought tolerance was associated with increased diversity of arbuscular mycorrhizal fungi, whereas cold tolerance was associated with lower fungal richness, likely reflecting a reduced burden of nonadapted fungal taxa. Understanding microbially mediated climate tolerance may enhance our ability to predict and manage the adaptability of forest ecosystems to changing climates.
DOI: adf2027
Source: https://www.science.org/doi/10.1126/science.adf2027