水分胁迫下Ca^(2+)与甘蔗内源ABA的关系  

RELATIONSHIP BETWEEN CALCIUM AND ENDOGENOUS ABA IN SUGARCANE SEEDLINGS UNDER DROUGHT STRESS

作　　者：翁笑艳[1] 阮妙鸿[1] 张积森[1] 郭春芳[1] 郭莺[1] 张木清[1] 

机构地区：[1]福建农林大学农业部甘蔗生理生态与遗传改良重点实验室

出　　处：《武夷科学》2007年第1期1-5,共5页Wuyi Science Journal

基　　金：国家"863"计划课题糖料新品种选育(2004AA241190);国家自然科学基金(30370901);教育部高等学校博士学科点专项科研基金项目(20040389009)

摘　　要：本文选取甘蔗(Saccharum officinarumL.)福农95-1702为材料,结合钙离子螯合剂EGTA预处理,对水分胁迫下Ca2+与内源激素ABA的关系进行研究。结果表明,30%PEG处理下,甘蔗幼苗叶片中的内源ABA含量升高。1-3mmol/L的EGTA预处理显著抑制了水分胁迫下内源ABA的累积。这些结果表明Ca2+可能参与了水分胁迫下ABA的合成和释放,第二信使Ca2+与ABA所介导的信号转导之间可能存在交流与互作,协同调节甘蔗的抗旱性。The relationship between Ca2＋ and other second signal molecule （ABA） in sugarcane （Saccharum officinarum L. ） seedlings under drought stress was examined. It was found that endogenous ABA accumulated in sugarcane seedlings under drought stress, and the drought - induced increase of ABA content was significantly inhibited by the pretreatment of EGTA （a Ca^2＋ chelator）. It demonstrated that the low concentration of Ca^2＋ in the cytoplasm might hamper the signal transduction of drought stress and finally decrease the synthesis and release of endogenous ABA, and there might be a crosstalk between the signal transduction pathways mediated by Ca^2＋ and ABA.

关 键 词：甘蔗 水分胁迫EGTA CA^2+ ABA 

分 类 号：S311[农业科学—作物栽培与耕作技术]