植物对微生物组组成的影响受到演替草地环境条件的制约。

IF 6.2 2区 环境科学与生态学 Q1 GENETICS & HEREDITY
Lenka Mészárošová, Eliška Kuťáková, Petr Kohout, Zuzana Münzbergová, Petr Baldrian
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引用次数: 0

摘要

背景:地下微生物介导着关键的生态系统过程,在植物营养和健康方面发挥着至关重要的作用。因此,了解地下微生物群的组成对于维持生态系统的稳定非常重要。地下微生物群的结构在很大程度上由单株植物决定,但目前还不清楚单株植物的影响范围有多广,反之,生长在附近的其他植物的影响范围又有多大:为了确定重点寄主植物在多样化群落中生长时对其土壤和根部微生物群落的影响程度,我们对初级演替草地序列中三种植物的地下细菌和真菌群落进行了采样。宿主对其地下微生物群落的影响程度因微生物群落、土壤和根系生境以及以植物邻居多样性水平不同为特征的演替阶段而异。取样地点对土壤微生物群落的结构影响最大,并显示出显著的空间模式,这种模式部分是由土壤化学驱动的。重点植物对土壤微生物群落的影响较小,但随着植物演替和植物多样性的增加,其影响呈上升趋势。相比之下,根系群落,尤其是细菌群落受重点植物物种的影响较大。重要的是,我们还发现邻近植物群落组成对与重点植物根系相关的细菌和真菌有显著影响。宿主对根部微生物组的影响在草地演替序列中各不相同,在多样性最高的地点影响最大:我们的研究结果表明,在物种丰富的天然草地上,重点植物对地下微生物组的影响取决于环境背景,并受周围植物群落的调节。邻近植物对根系群落的影响尤为明显,这可能会对植物群落的生产力和稳定性产生多重影响,强调了植物多样性对生态系统功能的重要性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Plant effects on microbiome composition are constrained by environmental conditions in a successional grassland.

Background: Below-ground microbes mediate key ecosystem processes and play a vital role in plant nutrition and health. Understanding the composition of the belowground microbiome is therefore important for maintaining ecosystem stability. The structure of the belowground microbiome is largely determined by individual plants, but it is not clear how far their influence extends and, conversely, what the influence of other plants growing nearby is.

Results: To determine the extent to which a focal host plant influences its soil and root microbiome when growing in a diverse community, we sampled the belowground bacterial and fungal communities of three plant species across a primary successional grassland sequence. The magnitude of the host effect on its belowground microbiome varied among microbial groups, soil and root habitats, and successional stages characterized by different levels of diversity of plant neighbours. Soil microbial communities were most strongly structured by sampling site and showed significant spatial patterns that were partially driven by soil chemistry. The influence of focal plant on soil microbiome was low but tended to increase with succession and increasing plant diversity. In contrast, root communities, particularly bacterial, were strongly structured by the focal plant species. Importantly, we also detected a significant effect of neighbouring plant community composition on bacteria and fungi associating with roots of the focal plants. The host influence on root microbiome varied across the successional grassland sequence and was highest in the most diverse site.

Conclusions: Our results show that in a species rich natural grassland, focal plant influence on the belowground microbiome depends on environmental context and is modulated by surrounding plant community. The influence of plant neighbours is particularly pronounced in root communities which may have multiple consequences for plant community productivity and stability, stressing the importance of plant diversity for ecosystem functioning.

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来源期刊
Environmental Microbiome
Environmental Microbiome Immunology and Microbiology-Microbiology
CiteScore
7.40
自引率
2.50%
发文量
55
审稿时长
13 weeks
期刊介绍: Microorganisms, omnipresent across Earth's diverse environments, play a crucial role in adapting to external changes, influencing Earth's systems and cycles, and contributing significantly to agricultural practices. Through applied microbiology, they offer solutions to various everyday needs. Environmental Microbiome recognizes the universal presence and significance of microorganisms, inviting submissions that explore the diverse facets of environmental and applied microbiological research.
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