外源Ca^(2+)对盐胁迫下甜瓜叶片气孔开度的调节  

Effects of Exogenous Ca^(2+) on Stomatal Morphological Character of Melon Leaf and Regulation under Salt Stress

作　　者：王黎敏[1] 黄丹枫[1] 张屹东[1] 

机构地区：[1]上海交通大学农业与生物学院,上海200240

出　　处：《长江蔬菜》2011年第2期36-39,共4页Journal of Changjiang Vegetables

基　　金："上海市科技兴农推广项目"蔬菜生产基地高效栽培技术的集成示范(沪农科推字(2008)第4-1号);甜瓜钾离子通道提高植物耐盐性的分子机理研究(09JC1408500);上海市蔬菜学重点学科(B209)

摘　　要：研究了盐胁迫下甜瓜叶片气孔开度变化及外源Ca2+对甜瓜叶片气孔开度的调节作用。研究结果表明,盐胁迫下甜瓜叶片气孔开度显著增加,此变化是由NaCl促进气孔宽度增加引起的,而其对气孔长度无调节作用。同时,外源Ca2+对盐胁迫下的甜瓜气孔开度的调节也是反映在对气孔宽度的调节上,该调节效应受外界盐胁迫状况的影响。低浓度Ca2+(0.1mmol/L)会促进盐胁迫诱导的气孔开放,高浓度的Ca2+(10mmol/L)能抑制盐胁迫诱导的气孔开放,起缓解盐胁迫的作用。This study was focused on the response of stomatal morphological character of melon leaf when applying different exogenous Ca2＋ under salt stress.The results presented a significant augmentation in stomatal aperture caused by the promotion of stomatal width instead of length under salt stress.Meanwhile,the regulation of stomatal aperture by exogenous Ca2＋ under salt stress was also reflected in the width of the stomatal regulation,and influenced by the external salt condition.Low concentrations of Ca2＋（0.1 mmol/L） will promote stomatal opening which was induced by salt stress,while high concentrations of Ca2＋（10 mmol/L） inhibited stomatal opening induced by salt stress,and relieve the threat.

关 键 词：甜瓜叶片 气孔 盐胁迫 外源CA2+ 

分 类 号：S652[农业科学—果树学]