Abolishing ARF8A activity promotes disease resistance in tomato

Iftah Marash, Meirav Leibman-Markus, Rupali Gupta, Alon Israeli, Naama Teboul, Adi Avni, Naomi Ori, Maya Bar*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Auxin response factors (ARFs) are a family of transcription factors that regulate auxin-dependent developmental processes. Class A ARFs function as activators of auxin-responsive gene expression in the presence of auxin, while acting as transcriptional repressors in its absence. Despite extensive research on the functions of ARF transcription factors in plant growth and development, the extent, and mechanisms of their involvement in plant resistance, remain unknown. We have previously reported that mutations in the tomato AUXIN RESPONSE FACTOR8 (ARF8) genes SlARF8A and SlARF8B result in the decoupling of fruit development from pollination and fertilization, leading to partial or full parthenocarpy and increased yield under extreme temperatures. Here, we report that fine-tuning of SlARF8 activity results in increased resistance to fungal and bacterial pathogens. This resistance is mostly preserved under fluctuating temperatures. Thus, fine-tuning SlARF8 activity may be a potent strategy for increasing overall growth and yield.

Original languageAmerican English
Article number112064
JournalPlant Science
Volume343
DOIs
StatePublished - Jun 2024

Bibliographical note

Publisher Copyright:
© 2024 Elsevier B.V.

Keywords

  • ARF
  • Auxin
  • Immunity
  • Tomato

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