菌群纵向传播维持植物共生功能体的延续
创作:小扣啊 审核:周旸 2018年05月11日
  • 植物通过将菌群传播给后代来确保有益共生体的存在;
  • 以无性系植物欧活血丹作为模型研究母体和后代植株的根部菌群,发现多数母体植物的共生细菌和真菌垂直传播给后代,但不传播古菌;
  • 传播菌群的丰富度较低,说明存在菌株筛选过程;
  • 传播菌群在子代植株间相似度高,组成了一个特定的可遗传微生物群,有助于理解植物共生功能体;
  • 距离母株的距离和生长时间显著影响传播菌群的丰富度;
  • 菌群传播极大地推动了植物-菌群共生体的建立和运作。
主编推荐语
周旸
共生菌群的纵向传播现象也存在于植物中。通过研究共生菌群在无性系植物亲代-子代之间的传递,本研究发现传播菌群具有特定的结构,并且受到环境、生长时间的影响。本研究对于了解植物-菌群互作、植物共生功能体的维持具有重要参考价值,值得专业人士关注。
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Microbiome [IF:11.607]

A microorganisms' journey between plant generations

微生物在植物世代之间的旅程

10.1186/s40168-018-0459-7

2018-04-26, Article

Abstract & Authors:展开

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BACKGROUND: Plants are colonized by a great diversity of microorganisms which form a microbiota and perform additional functions for their host. This microbiota can thus be considered a toolbox enabling plants to buffer local environmental changes, with a positive influence on plant fitness. In this context, the transmission of the microbiota to the progeny represent a way to ensure the presence of beneficial symbionts within the habitat. Examples of such transmission have been mainly described for seed transmission and concern a few pathogenic microorganisms. We investigated the transmission of symbiotic partners to plant progeny within clonal plant network.
METHODS: We used the clonal plant Glechoma hederacea as plant model and forced newly emitted clonal progeny to root in separated pots while controlling the presence of microorganisms. We used an amplicon sequencing approach of 16S and 18S rRNA targeting bacteria/archaea and fungi respectively to describe the root microbiota of mother and clonal-plant offspring.
RESULTS: We demonstrated the vertical transmission of a significant proportion of the mother plants' symbiotic bacteria and fungi to the daughters. Interestingly, archaea were not transmitted to the daughter plants. Transmitted communities had lower richness, suggesting a filtration during transmission. We found that the transmitted pool of microorganisms was similar among daughters, constituting the heritability of a specific cohort of microorganisms, opening a new understanding of the plant holobiont. We also found significant effects of distance to the mother plant and of growth time on the richness of the microbiota transmitted.
CONCLUSIONS: In this clonal plant, microorganisms are transmitted between individuals through connections, thereby ensuring the availability of microbe partners for the newborn plants as well as the dispersion between hosts for the microorganisms. This previously undescribed ecological process allows the dispersal of microorganisms in space and across plant generations. As the vast majority of plants are clonal, this process might be therefore a strong driver of ecosystem functioning and assembly of plant and microorganism communities in a wide range of ecosystems.

First Authors:
Nathan Vannier

Correspondence Authors:
Nathan Vannier

All Authors:
Nathan Vannier,Cendrine Mony,Anne-Kristel Bittebiere,Sophie Michon-Coudouel,Marine Biget,Philippe Vandenkoornhuyse

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Microbiome:微生物在植物世代之间的旅程

2020-03-17

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