Sammanfattning

Adventitious root initiation (ARI) is ade novoorganogenesis program and a key adaptive trait in plants. Several hormones regulate ARI but the underlying genetic architecture that integrates the hormonal crosstalk governing this process remains largely elusive. In this study, we use genetics, genome editing, transcriptomics, hormone profiling and cell biological approaches to demonstrate a crucial role played by the APETALA2/ETHYLENE RESPONSE FACTOR 115 transcription factor. We demonstrate that ERF115 functions as a repressor of ARI by activating the cytokinin (CK) signaling machinery. We also demonstrate thatERF115is transcriptionally activated by jasmonate (JA), an oxylipin-derived phytohormone, which represses ARI in NINJA-dependent and independent manners. Our data indicate that NINJA-dependent JA signaling in pericycle cells blocks early events of ARI. Altogether, our results reveal a previously unreported molecular network involving cooperative crosstalk between JA and CK machineries that represses ARI.

Nyckelord

adventitious rooting; AP2; ERF transcription factors; cytokinins; de novoorganogenesis; jasmonate

Publicerad i

New Phytologist
2020, Volym: 228, nummer: 5, sidor: 1611-1626
Utgivare: WILEY

SLU författare

• Novak, Ondrej

  • Institutionen för skoglig genetik och växtfysiologi, Sveriges lantbruksuniversitet
    
  • Akademie věd České republiky
  • Univerzity Palackého v Olomouci

UKÄ forskningsämne

Botanik


Publikationens identifierare

DOI: https://doi.org/10.1111/nph.16794

Permanent länk till denna sida (URI)

https://res.slu.se/id/publ/107255