Institute of Plant Biology and Department of Life Science, National Taiwan University, Taipei, Taiwan.
Plant Signal Behav. 2012 Sep 1;7(9):1056-7. doi: 10.4161/psb.21124. Epub 2012 Aug 17.
The Ca ( 2+) /calmodulin (CaM) signaling pathway mediates the heat stress (HS) response and acquisition of thermotolerance in plants. We showed that the rice CaM1-1 isoform can interpret a Ca ( 2+) signature difference in amplitude, frequency, and temporal-spatial properties in regulating transcription of nucleoplasmic small heat-shock protein gene (sHSPC/N) during HS. Ca ( 2+) and A23187 treatments under HS generated an intense and sustained increase in [Ca ( 2+) ]cyt and accelerated the expression of CaM1-1 and sHSPC/N genes, which suggests that HS-induced apoplastic Ca ( 2+) influx was responsible for the [Ca ( 2+) ]cyt transient and downstream HS signaling. Here, we discuss an emerging paradigm in the oscillation regulation of CaM1-1 expression during HS and highlight the areas that need further investigation.
钙 (Ca 2+ )/钙调蛋白 (CaM) 信号通路介导植物的热应激 (HS) 反应和耐热性的获得。我们表明，水稻 CaM1-1 同工型可以解释在 HS 期间调节核质小热激蛋白基因 (sHSPC/N) 转录时 Ca 2+ 幅度、频率和时空特性的差异。在 HS 下，Ca 2+ 和 A23187 的处理产生了 [Ca 2+ ] cyt 的强烈和持续增加，并加速了 CaM1-1 和 sHSPC/N 基因的表达，这表明 HS 诱导的质外体 Ca 2+ 内流是 [Ca 2+ ] cyt 瞬变和下游 HS 信号的原因。在这里，我们讨论了在 HS 过程中 CaM1-1 表达的振荡调节中的一个新兴范例，并强调了需要进一步研究的领域。
