期刊
PLANT SIGNALING & BEHAVIOR
卷 5, 期 12, 页码 1530-1533出版社
TAYLOR & FRANCIS INC
DOI: 10.4161/psb.5.12.13163
关键词
acclimation; calcium signaling; fatty acids; moss; Physcomitrella patens; stress response
资金
- Swiss National Science Foundation [3100A0-109290]
- Hungarian National Scientific Research Foundation [OTKA NK 68379, OTKA NN 76716]
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 degrees C, tissues grown at 32 degrees C had significantly higher overall membrane lipid saturation level and, when submitted to a short heat shock at 35 degrees 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.
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