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WIND1 orchestrates wound-induced callus formation, vascular reconnection and defense response in Arabidopsis

ABSTRACT: Wounding triggers de novo organogenesis, vascular reconnection and defense response but how wound stress evokes such a diverse array of physiological responses remains unknown. We previously identified an AP2/ERF transcription factor, WOUND INDUCED DEDIFFERENTIATION1 (WIND1), as a key regulator of wound-induced cellular reprogramming in Arabidopsis. To understand how WIND1 promotes downstream events, we performed time-course transcriptome analyses after WIND1 induction. We observed a significant overlap between WIND1-induced genes and genes implicated in cellular reprogramming, vascular formation and pathogen response. We demonstrated that WIND1 induces several reprogramming genes to promote callus formation at wound sites. We, in addition, showed that WIND1 promotes tracheary element formation, vascular reconnection and flagellin-triggered defense responses. These results indicate that WIND1 functions as a master regulator of wound-induced responses by promoting dynamic transcriptional alterations. This study provides deeper mechanistic insights into how plants control multiple physiological responses after wounding.

ORGANISM(S): Arabidopsis thaliana

PROVIDER: GSE167174 | GEO | 2021/10/01

REPOSITORIES: GEO

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