Membrane lipid composition affects plant heat sensing and modulates Ca ( 2+) -dependent heat shock response.


Autoria(s): Saidi Y.; Peter M.; Finka A.; Cicekli C.; Vigh L.; Goloubinoff P.
Data(s)

2010

Resumo

Understanding how plants sense and respond to heat stress is central to improve crop tolerance and productivity. Recent findings in Physcomitrella patensdemonstrated 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.

Identificador

http://serval.unil.ch/?id=serval:BIB_E05E8A3EFB76

isbn:1559-2324 (Electronic)

pmid:21139423

doi:10.4161/psb.5.12.13163

Idioma(s)

en

Fonte

Plant Signaling and Behavior, vol. 5, no. 12, pp. 1530-1533

Tipo

info:eu-repo/semantics/article

article