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

我们研究了拟南芥钙依赖蛋白激酶(CPKs)及其底物在植物或非生物胁迫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)的磷酸化促进了防御反应中的转录激活。这些CPK可能对植物中广泛的中央信号转导反应做出贡献，而它们的底物靶标是不同的。

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.