Rhizobacterial volatiles and photosynthesis‐related signals coordinate MYB72 expression in Arabidopsis roots during onset of induced systemic resistance and iron‐deficiency responses

• DOI: 10.1111/tpj.12995
• Publication Date: 2015-08-26T08:26:55Z
• Authors: Christos Zamioudis; Jolanda Korteland; Johan A. Van Pelt; Muriël van Hamers...; Nina Dombrowski; Yang Bai; Johannes Hanson; Marcel C. Van Verk; Hong‐Qing Ling; Paul Schulze‐Lefert; Corné M.J. Pieterse
• Keywords: MYB

Summary In Arabidopsis roots, the transcription factor MYB 72 plays a dual role in onset of rhizobacteria‐induced systemic resistance ( ISR ) and plant survival under conditions limited iron availability. Previously, it was shown that coordinates expression gene module promotes synthesis excretion iron‐mobilizing phenolic compounds rhizosphere, process is involved both acquisition signaling. Here, we show volatile organic VOC s) from ‐inducing Pseudomonas bacteria are important elicitors . response to treatment, co‐expressed with uptake‐related genes FERRIC REDUCTION OXIDASE 2 FRO IRON ‐ REGULATED TRANSPORTER 1 IRT manner dependent on FER‐LIKE DEFICIENCY TRANSCRIPTION FACTOR (FIT), indicating an intrinsic part plant's iron‐acquisition typically activated upon starvation. However, induced independently availability root vicinity. Moreover, rhizobacterial ‐mediated induction requires photosynthesis‐related signals, while deficiency rhizosphere activates absence shoot‐derived signals. Together, these results acquisition‐related roots by volatiles enhances capacity rhizosphere. This work highlights processes which microbiota simultaneously stimulate immunity activate iron‐uptake machinery their host plants.