Grapevine rootstocks shape underground bacterial microbiome and networking but not potential functionality

• DOI: 10.1186/s40168-017-0391-2
• Publication Date: 2018-01-03T10:34:59Z
• Authors: Ramona Marasco; Eleonora Rolli; Marco Fusi; Grégoire Michoud; Daniele Daffonchio
• Keywords: Phyllosphere; Vineyard; Root system

The plant compartments of Vitis vinifera, including the rhizosphere, rhizoplane, root endosphere, phyllosphere and carposphere, provide unique niches that drive specific bacterial microbiome associations. majority endophytes originate from soil migrate up to aerial through endosphere. Thus, endosphere partially define in leaves berries, contributing terroir fruit. However, V. vinifera cultivars are invariably grafted onto rootstocks other species hybrids. It has been hypothesized determines and, as a consequence, In this work, we test first part hypothesis. We investigate whether different influence bacteria selected surrounding soil, affecting diversity potential functionality rhizosphere Bacterial microbiomes both tissues Barbera cultivars, ungrafted on four rootstocks, cultivated same vineyard, were characterized by 16S rRNA high-throughput sequencing. To assess genotype communities’ recruitment system, (i) phylogenetic coupled with predicted functional profiles (ii) co-occurrence networks determined. Cultivation-dependent approaches used reveal plant-growth promoting (PGP) associated systems. Richness, community networking significantly influenced rootstocks. Complementary shared microbiome, subsets bacteria, those endowed PGP traits, system interaction between rootstock exerted selective pressure enhanced niche differentiation, but rootstock-specific communities still recruited conserved traits. While influences taxonomy, structure network properties grapevine roots, homeostatic effect distribution traits was found.