Lin Qi, Wang Ying, Li Miaomiao, Xu Zhixia, Li Lei
Ministry of Education Key Laboratory for Ecology of Tropical Islands, Hainan Normal University, Haikou, China.
Front Plant Sci. 2022 Oct 20;13:988485. doi: 10.3389/fpls.2022.988485. eCollection 2022.
The plant microbiome profoundly affects many aspects of host performance; however, the ecological processes by which plant hosts govern microbiome assembly, function, and dispersal remain largely unknown. Here, we investigated the bacterial and fungal communities in multiple compartment niches (bulk soil, rhizosphere soil, root endosphere, phylloplane, and leaf endosphere) of L. at three developmental stages in Hainan Province, China. We found that microbiome assemblages along the soil-plant continuum were shaped by the compartment niches. Bacterial diversity and richness decreased from the soils to roots to leaves, with the highest network complexity found in the roots and the lowest found in the phylloplane. However, fungal diversity gradually increased from the soils to roots to phyllosphere, whereas fungal richness decreased from the soils to roots but increased from the roots to phyllosphere; the greatest network complexity was found in bulk soils and the lowest was found in the roots. Different biomarker taxa occurred in the different ecological niches. Bacterial and fungal communities exhibited distinct ecological functions; the former played important roles in maintaining plant growth and providing nutrients, whereas the latter predominantly decomposed organic matter. The bacterial community of mostly originated from bulk soil, whereas the fungal community was mainly derived from rhizosphere soil and air. Leaf endophytes were positively correlated with organic carbon, and root and soil microorganisms were positively correlated with total nitrogen, total phosphorus, and total potassium. Our findings provide empirical evidence for plant-microbiome interactions and contribute to future research on non-crop management and the manipulation of non-crop microbiomes.
植物微生物组深刻影响宿主性能的许多方面；然而，植物宿主控制微生物组组装、功能和扩散的生态过程仍 largely 未知。在这里，我们调查了中国海南省三个发育阶段的 L. 的多个隔室生态位（土壤、根际土壤、根内圈、叶表和叶内圈）中的细菌和真菌群落。我们发现，沿着土壤 - 植物连续体的微生物组组装受隔室生态位的影响。细菌多样性和丰富度从土壤到根再到叶逐渐降低，根中的网络复杂性最高，叶表中的最低。然而，真菌多样性从土壤到根再到叶际逐渐增加，而真菌丰富度从土壤到根降低，但从根到叶际增加；土壤中的网络复杂性最高，根中的最低。不同的生物标志物分类群出现在不同的生态位中。细菌和真菌群落表现出不同的生态功能；前者在维持植物生长和提供养分方面发挥重要作用，而后者主要分解有机物。L. 的细菌群落大多起源于土壤，而真菌群落主要来自根际土壤和空气。叶内生菌与有机碳呈正相关，根和土壤微生物与总氮、总磷和总钾呈正相关。我们的研究结果为植物 - 微生物组相互作用提供了实证依据，并有助于未来关于非作物管理和非作物微生物组操纵的研究。
