Colonization and survival capacities underlying the multifaceted life of Rhodococcus sp. PBTS1 and PBTS2

• DOI: 10.1111/ppa.13307
• Publication Date: 2020-11-01T16:10:57Z
• Authors: Danny Vereecke; Elizabeth J. Fich...; Paul Q. Lambert; Peter Cooke; James Kilcrease; Rio A. Stamler; Yucheng Zhang; Isolde M. Francis; Jennifer J. Randall
• Keywords: Phyllosphere; Pathosystem; Metaproteomics

Abstract Little is known about the epidemiology of newly emerged disease on pistachio rootstock designated bushy top syndrome (PBTS). Here, we analysed survival and colonization capacities two causative agents, Rhodococcus corynebacterioides ‐like PBTS1 R . fascians PBTS2, in different habitats they occupy. Additionally, examined their chromosomal sequences for genes that would support ecology provide experimental evidence some predicted functions. We demonstrate soil competence PBTS2 better than both bacteria behave chemotactically, allowing them to translocate from rhizoplane. Once rhizoplane phylloplane, PBTS form extensive epiphytic biofilms, probably aided by exopolysaccharide production. From these colonize plant's interior tissues through formation ingression sites, likely created localized activity cell wall‐degrading enzymes. The observed systemic spreading strains throughout plant mediated surface motility agrees with occurrence symptoms aerial root parts host. Based all available information, a working model this pathosystem be used as conceptual framework future research.