Membrane lipid composition affects plant heat sensing and modulates Ca2+-dependent heat shock response

Younousse Saidi, Maria Peter, Andrija Fink, Cyril Cicekli, Laszlo Vigh, Pierre Goloubinoff

Research output: Contribution to journalArticle

47 Citations (Scopus)

Abstract

Understanding how plants sense and respond to heat stress is central to improve crop tolerance and productivity. Recent findings in Physcomitrella patens demonstrated that the controlled passage of calcium ions across the plasma membrane regulates the heat shock response (HSR). To investigate the effect of membrane lipid composition on the plant HSR, we acclimated P. patens to a slightly elevated yet physiological growth temperature and analysed the signature of calcium influx under a mild heat shock. Compared to tissues grown at 22°C, tissues grown at 32°C had significantly higher overall membrane lipid saturation level and, when submitted to a short heat shock at 35°C, displayed a noticeably reduced calcium influx and a consequent reduced heat shock gene expression. These results show that temperature differences, rather than the absolute temperature, determine the extent of the plant HSR and indicate that membrane lipid composition regulates the calcium-dependent heat-signaling pathway.

Original languageEnglish
JournalPlant Signaling and Behavior
Volume5
Issue number12
DOIs
Publication statusPublished - Dec 1 2010

Keywords

  • Acclimation
  • Calcium signaling
  • Fatty acids
  • Moss
  • Physcomitrella patens
  • Stress response

ASJC Scopus subject areas

  • Plant Science

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