The rhizosphere microbiome of 51 potato cultivars with diverse plant growth characteristics.

IF 3.5 3区 生物学 Q2 MICROBIOLOGY
Benoit Renaud Martins, Viviane Radl, Krzysztof Treder, Dorota Michałowska, Karin Pritsch, Michael Schloter
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Abstract

Rhizosphere microbial communities play a substantial role in plant productivity. We studied the rhizosphere bacteria and fungi of 51 distinct potato cultivars grown under similar greenhouse conditions using a metabarcoding approach. As expected, individual cultivars were the most important determining factor of the rhizosphere microbial composition; however, differences were also obtained when grouping cultivars according to their growth characteristics. We showed that plant growth characteristics were related to deterministic and stochastic assembly processes of bacterial and fungal communities, respectively. The bacterial genera Arthrobacter and Massilia (known to produce indole acetic acid and siderophores) exhibited greater relative abundance in high- and medium-performing cultivars. Bacterial co-occurrence networks were larger in the rhizosphere of these cultivars and were characterized by a distinctive combination of plant beneficial Proteobacteria and Actinobacteria along with a module of diazotrophs namely Azospira, Azoarcus, and Azohydromonas. Conversely, the network within low-performing cultivars revealed the lowest nodes, hub taxa, edges density, robustness, and the highest average path length resulting in reduced microbial associations, which may potentially limit their effectiveness in promoting plant growth. Our findings established a clear pattern between plant productivity and the rhizosphere microbiome composition and structure for the investigated potato cultivars, offering insights for future management practices.

具有不同植物生长特性的 51 个马铃薯栽培品种的根瘤微生物群。
根圈微生物群落在植物生产力中发挥着重要作用。我们采用元条码方法研究了 51 个不同马铃薯栽培品种在类似温室条件下生长的根瘤菌和真菌。不出所料,单个栽培品种是决定根圈微生物组成的最重要因素;然而,根据栽培品种的生长特性对其进行分组也会发现差异。我们证明,植物生长特性分别与细菌和真菌群落的确定性和随机性组装过程密切相关。细菌属 Arthrobacter 和 Massilia(已知能产生 IAA 和嗜苷酸类物质)在表现良好和中等的栽培品种中表现出更高的相对丰度。在这些栽培品种的根瘤菌群中,细菌共生网络更大,其特点是由对植物有益的变形菌和放线菌以及重氮营养菌(即 Azospira、Azoarcus 和 Azohydromonas)组成的独特组合。相反,低效栽培品种的网络显示出最低的节点、中心类群、边缘密度、稳健性和最高的平均路径长度,导致微生物关联减少,这可能会限制它们在促进植物生长方面的有效性。我们的研究结果在所调查的马铃薯栽培品种的植物生产力与根瘤微生物组的组成和结构之间建立了清晰的模式,为未来的管理实践提供了启示。
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来源期刊
FEMS microbiology ecology
FEMS microbiology ecology 生物-微生物学
CiteScore
7.50
自引率
2.40%
发文量
132
审稿时长
3 months
期刊介绍: FEMS Microbiology Ecology aims to ensure efficient publication of high-quality papers that are original and provide a significant contribution to the understanding of microbial ecology. The journal contains Research Articles and MiniReviews on fundamental aspects of the ecology of microorganisms in natural soil, aquatic and atmospheric habitats, including extreme environments, and in artificial or managed environments. Research papers on pure cultures and in the areas of plant pathology and medical, food or veterinary microbiology will be published where they provide valuable generic information on microbial ecology. Papers can deal with culturable and non-culturable forms of any type of microorganism: bacteria, archaea, filamentous fungi, yeasts, protozoa, cyanobacteria, algae or viruses. In addition, the journal will publish Perspectives, Current Opinion and Controversy Articles, Commentaries and Letters to the Editor on topical issues in microbial ecology. - Application of ecological theory to microbial ecology - Interactions and signalling between microorganisms and with plants and animals - Interactions between microorganisms and their physicochemical enviornment - Microbial aspects of biogeochemical cycles and processes - Microbial community ecology - Phylogenetic and functional diversity of microbial communities - Evolutionary biology of microorganisms
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