%0 Journal Article
%T Intracellular Ca2+ Changes During Cold Stress in CBF1-overexpress Arabidopsis<br>低温胁迫下拟南芥CBF1超表达突变体胞质中Ca2+浓度的变化
%A Guozeng Zhang
%A Ling Bai
%A Chunpeng Song
%A <br>张国增
%A 白玲
%A 宋纯鹏
%J 植物学报
%D 2009
%I 
%X Plant growth is greatly affected by low temperature. Cold shock elicits an immediate increase in free Ca2+ concentration in plant cells. Here, we focused on the expression of CBF1 under low temperature treatment and the cold-triggered Ca2+ responses in CBF1-overexpressing Arabidopsis. CBF1 was induced by low temperature. To address the relation between CBF1 and Ca2+, we measured cold-triggered Ca2+ responses in CBF1-overexpressing Arabidopsis. CBF1-overexpressing plants exhibited a higher mean peak Ca2+ concentration than did wild-type plants, but the Ca2+ signature adjacent to the vacuolar membrane increased to similar levels in both plants. In Arabidopsis seedlings pretreated with EGTA or LaCl3, the cold shock-induced increase of Ca2+ concentration was inhibited. The cytoplasmic Ca2+ concentration in CBF1-overexpressing and wild-type plants decreased to the same level. Thus, the results suggest that Ca2+ is involved in the process of the CBF1 response to low-temperature signal transduction, and the CBF1-overexpress may enhance freezing tolerance of plants by increasing the cytoplasmic free Ca2+ concentration.
%K <br>水母发光蛋白
%K 拟南芥
%K 钙离子
%K CBF1
%K 低温胁迫
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=90BA3D13E7F3BC869AC96FB3DA594E3FE34FBF7B8BC0E591&jid=97AE3D0EBF25E42C466FEF50E492F710&aid=1C850D5111EA28A0E591813119E7CE76&yid=DE12191FBD62783C&vid=1AE5323881A5ECDC&iid=38B194292C032A66&sid=E2B9962CCD971A0D&eid=F50A8B5513721E1C&journal_id=1674-3466&journal_name=植物学报&referenced_num=0&reference_num=19