FORGETTER2 protein phosphatase and phospholipase D modulate heat stress memory in Arabidopsis

Reynel Urrea Castellanos, Thomas Friedrich, Nevena Petrovic, Simone Altmann, Krzysztof Brzezinka, Michal Gorka, Alexander Graf, Isabel Bäurle (Lead / Corresponding author)

Research output: Contribution to journalArticle

Abstract

Plants can mitigate environmental stress conditions through acclimation. In the case of fluctuating stress conditions such as high temperatures, maintaining a stress memory enables a more efficient response upon recurring stress. In a genetic screen for Arabidopsis thaliana mutants impaired in the memory of heat stress (HS) we have isolated the FORGETTER2 (FGT2) gene which encodes a type 2C protein phosphatase (PP2C) of the D-clade. Mutants in fgt2 acquire thermotolerance normally; however, they are defective in the memory of HS. FGT2 interacts with phospholipase Dα2 (PLDα2), which is involved in metabolizing membrane phospholipids, and PLDα2 is also required for HS memory. In summary, we uncover a previously unknown component of HS memory and identify the FGT2 protein phosphatase and PLDα2 as crucial players, suggesting that phosphatidic acid-dependent signaling or membrane composition dynamics underlie HS memory.

Original languageEnglish
JournalPlant Journal
DOIs
Publication statusE-pub ahead of print - 12 Jul 2020

Keywords

  • priming
  • protein phosphatase
  • stress memory
  • heat stress
  • Arabidopsis thaliana

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    Urrea Castellanos, R., Friedrich, T., Petrovic, N., Altmann, S., Brzezinka, K., Gorka, M., Graf, A., & Bäurle, I. (2020). FORGETTER2 protein phosphatase and phospholipase D modulate heat stress memory in Arabidopsis. Plant Journal. https://doi.org/10.1111/tpj.14927