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 journalArticlepeer-review

4 Citations (Scopus)
31 Downloads (Pure)

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. Fgt2 mutants acquire thermotolerance normally; however, they are defective in the memory of HS. FGT2 interacts with phospholipase D α2 (PLDα2), which is involved in the metabolism of membrane phospholipids and is also required for HS memory. In summary, we have uncovered a previously unknown component of HS memory and identified the FGT2 protein phosphatase and PLDα2 as crucial players, suggesting that phosphatidic acid-dependent signaling or membrane composition dynamics underlie HS memory.

Original languageEnglish
Number of pages11
JournalPlant Journal
Early online date12 Jul 2020
DOIs
Publication statusE-pub ahead of print - 12 Jul 2020

Keywords

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

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