Regulation of Arabidopsis defense responses against herbivory and abiotic stresses by calcium-dependent protein phosphorylation and ubiquitnation

我们研究了拟南芥Ca^<2+>依赖性蛋白激酶（CPKs）及其底物在草食或非生物应激诱导的防御相关转录机制信号网络中的可能参与。我们发现cpk衍生的热休克转录因子（HsfB2a）磷酸化促进防御反应中的转录激活。这些cpk可能参与植物中广泛的中枢信号转导反应，而它们的底物靶点则不同。

We investigated the possible involvement of Arabidopsis Ca^<2+>-dependent protein kinases (CPKs) and their substrates in the herbivory- or abiotic stress-induced signaling network for the defense-related transcriptional machinery. We found that CPK-derived phosphorylation of a heat shock transcription factor (HsfB2a) promotes transcriptional activation in the defense response. Those CPKs are likely to contribute to a wide range of central signal transduction responses in plants, whereas their substrate targets are differently involved.