Université de Toulouse, Université Paul Sabatier, UMR 5546, Laboratoire de Recherche en Sciences végétales, BP 42617, Auzeville, F-31326 Castanet-Tolosan, France.
Adv Exp Med Biol. 2012;740:1123-43. doi: 10.1007/978-94-007-2888-2_51.
Calcium is a key second messenger in signaling pathways associated with developmental and adaptive processes in plants. Stimulus-specific calcium signals, considered as calcium signatures, are translated into appropriate cellular responses through the action of various calcium-binding proteins and downstream effectors. We review here recent progress made in calcium signaling in the nucleus of plant cell. Experimental evidences show that nuclei can generate calcium signals on their own and point out the importance of calcium in the regulation of gene transcription. Future directions are given concerning the need to elucidate the mechanisms involved in the regulation of nuclear calcium homeostasis, the conversion of calcium signals into transcriptional responses or other fundamental downstream nuclear functions. Overall, a better understanding of nuclear signaling will be useful to get an integrated picture of the signaling network of the plant cell.
钙是与植物发育和适应过程相关的信号通路中的关键第二信使。被认为是钙特征的刺激特异性钙信号通过各种钙结合蛋白和下游效应物的作用转化为适当的细胞反应。在这里，我们回顾了植物细胞核中钙信号传递的最新进展。实验证据表明，细胞核可以自行产生钙信号，并指出钙在基因转录调控中的重要性。未来的方向需要阐明核内钙稳态调节、钙信号转化为转录反应或其他基本的核下游功能的调节机制。总的来说，对核信号的更好理解将有助于全面了解植物细胞的信号网络。
