Balancing trade-offs between biotic and abiotic stress responses through leaf age-dependent variation in stress hormone cross-talk

• DOI: 10.1073/pnas.1817233116
• Publication Date: 2019-01-24T02:12:02Z
• Authors: Matthias L. Berens; Katarzyna W. Woli...; Stijn Spaepen; Jörg Ziegler; Tatsuya Nobori; Aswin Nair; Verena Krüler; Thomas M. Winkelm...; Yiming Wang; Akira Mine; Dieter Becker; Ruben Garrido-Oter; Paul Schulze-Lefert; Kenichi Tsuda
• Keywords: Biotic stress; Phyllosphere

In nature, plants must respond to multiple stresses simultaneously, which likely demands cross-talk between stress-response pathways minimize fitness costs. Here we provide genetic evidence that biotic and abiotic stress responses are differentially prioritized in Arabidopsis thaliana leaves of different ages maintain growth reproduction under combined stresses. Abiotic stresses, such as high salinity drought, blunted immune older rosette through the phytohormone abscisic acid signaling, whereas this antagonistic effect was blocked younger by PBS3 , a signaling component defense salicylic acid. Plants lacking exhibited enhanced tolerance at cost decreased Together with role, is also indispensable for establishment salt stress- leaf age-dependent phyllosphere bacterial communities. Collectively, our work reveals mechanism balances trade-offs upon conflicting organism level identifies intersection among plant immunity, microbiota, tolerance.