Beneficial microbes ameliorate abiotic and biotic sources of stress on plants

1. Global climate change and shifting land-use are increasing plant stress due to abiotic factors such as drought, heat, salinity and cold, as well as via the intensification of biotic stressors such as herbivores and pathogens. The ability of plants to tolerate such stresses is modulated by the bacteria and fungi that live on or inside of plant tissues and comprise the plant microbiome. However, the impacts of diverse classes of beneficial microbes and the contrasting stresses that impact plant performance are most commonly studied independently of each other.
2. Our meta-analysis of 288 experiments across 89 studies moves beyond previous studies in that we simultaneously compare the roles of bacterial versus fungal microbiome members that live within plant tissues and colonize plant surfaces in ameliorating biotic versus abiotic sources of plant stress.
3. The magnitude of microbial stress amelioration can be measured as the greater proportional impact of beneficial microbes on plant...

1. 全球气候变化与土地利用格局的转变，正通过干旱、高温、盐渍与低温等非生物（abiotic）因子，以及植食动物、病原菌等生物（biotic）胁迫因子的加剧作用，加重植物所承受的胁迫压力。定殖于植物组织内部或表面、构成植物微生物组（plant microbiome）的细菌与真菌，可调控植物对上述胁迫的耐受能力。然而，当前针对不同类群有益微生物的影响，以及影响植物生长表现的各类胁迫的研究，大多仍彼此独立开展，尚未实现二者的协同探究。
2. 本研究对89项研究中的288组实验开展荟萃分析（meta-analysis），相较于既往研究实现了研究维度的拓展：本研究同时对比了定殖于植物组织内部与植物表面的细菌类微生物组成员、真菌类微生物组成员，在缓解植物生物胁迫与非生物胁迫过程中的作用差异。
3. 微生物对植物胁迫的缓解效应强度，可通过有益微生物对植物……的更大比例影响进行量化评估。