Streptomyces-Induced Resistance Against Oak Powdery Mildew Involves Host Plant Responses in Defense, Photosynthesis, and Secondary Metabolism Pathways

• DOI: 10.1094/mpmi-10-13-0296-r
• Publication Date: 2014-04-29T13:59:53Z
• Authors: Florence Kurth; Sarah Mailänder; Markus Bönn; Lasse Feldhahn; Sylvie Herrmann; Ivo Große; François Buscot; Silvia D. Schrey; Mika T. Tarkka
• Keywords: Jasmonic acid; Phenylalanine ammonia-lyase; Phenylpropanoid; Defence mechanisms; Pseudomonas syringae

Rhizobacteria are known to induce defense responses in plants without causing disease symptoms, resulting increased resistance plant pathogens. This study investigated how Streptomyces sp. strain AcH 505 suppressed oak powdery mildew infection pedunculate oak, by analyzing RNA-Seq data from singly- and co-inoculated oaks. We found that this elicited a systemic response was, part, enhanced upon pathogen challenge. In addition induction of the jasmonic acid/ethylene-dependent pathway, suggests participation salicylic acid-dependent pathway. Transcripts related tryptophan, phenylalanine, phenylpropanoid biosynthesis were enriched phenylalanine ammonia lyase activity increased, indicating priming spp. shares some determinants with Pseudomonas-Arabidopsis system. Photosynthesis-related transcripts depleted infection, but alleviated inhibition, which suggested there is fitness benefit for primed offers novel insights into mechanisms actinobacteria highlights their capacity activate absence