4.6 Article

Grapevine Microbiota Reflect Diversity among Compartments and Complex Interactions within and among Root and Shoot Systems

期刊

MICROORGANISMS
卷 9, 期 1, 页码 -

出版社

MDPI
DOI: 10.3390/microorganisms9010092

关键词

grafting; grapevines; rootstock; sour rot; plant compartments; bacteria; fungi

资金

  1. National Science Foundation [1758713]
  2. NSF [1546869]
  3. Missouri Grape and Wine Institute
  4. Direct For Education and Human Resources
  5. Division Of Graduate Education [1758713] Funding Source: National Science Foundation

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The study shows that plant compartments have the biggest influence on microbial diversity. Rootstock genotype and irrigation do not significantly affect microbial diversity or composition, but the abundance of specific bacterial and fungal taxa varies with rootstock and irrigation treatment.
Grafting connects root and shoot systems of distinct individuals, bringing microbial communities of different genotypes together in a single plant. How do root system and shoot system genotypes influence plant microbiota in grafted grapevines? To address this, we utilized clonal replicates of the grapevine 'Chambourcin', growing ungrafted and grafted to three different rootstocks in three irrigation treatments. Our objectives were to (1) characterize the microbiota (bacteria and fungi) of below-ground compartments (roots, adjacent soil) and above-ground compartments (leaves, berries), (2) determine how rootstock genotype, irrigation, and their interaction influences grapevine microbiota in different compartments, and (3) investigate abundance of microorganisms implicated in the late-season grapevine disease sour rot (Acetobacterales and Saccharomycetes). We found that plant compartment had the largest influence on microbial diversity. Neither rootstock genotype nor irrigation significantly influenced microbial diversity or composition. However, differential abundance of bacterial and fungal taxa varied as a function of rootstock and irrigation treatment; in particular, Acetobacterales and Saccharomycetes displayed higher relative abundance in berries of grapevines grafted to '1103P' and 'SO4' rootstocks and varied across irrigation treatments. This study demonstrates that grapevine compartments retain distinct microbiota and identifies associations between rootstock genotypes, irrigation treatment, and the relative abundance of agriculturally relevant microorganisms in the berries.

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