黄瓜幼苗对镉胁迫下外源一氧化氮与铁氰化钾的响应  

Response of Exogenous Nitric Oxide and Potassium Ferricyanide Under Cadmium Stress in Cucumber Seedlings

作　　者：高荣侠[1] 

机构地区：[1]淄博职业学院,山东淄博255013

出　　处：《北方园艺》2014年第7期1-4,共4页Northern Horticulture

基　　金：国家"973"资助项目(2009CB119000);国家自然科学基金资助项目(30800751);国家大宗蔬菜产业技术体系资助项目(CARS-25-D-03)

摘　　要：以"津研4号"黄瓜为试材,研究了一氧化氮和铁氰化钾对镉胁迫的缓解作用。结果表明:以硝普钠为外源一氧化氮供体可以显著缓解镉胁迫对黄瓜幼苗生长的抑制,硝普钠可以促进幼苗的生长,缓解镉胁迫对幼苗生长的抑制作用;铁氰化钾处理后与镉相比,无明显变化;镉毒害后,叶片表现出明显的失绿现象,通过施加硝普钠提高了叶片中色素的含量,提高了叶片的净光合速率、蒸腾速率和气孔导度;同时,硝普钠可以提高镉胁迫下黄瓜叶片中抗氧化酶的活性及抗氧化能力,降低了丙二醛和H2O2积累。With ＇Jinyan No. 4＇ as experimental material,the roles of nitric oxide and potassium ferricyanide in alleviating cadmium stress were studied. The results indicated that using SNP as an exogenous NO donor could significantly relieve the inhibition of cadmium stress on the growth of cucumber seedlings. SNP could promote the growth of seedlings and alleviate the inhibitory effect of cadmium stress on cucumber growth. Potassium ferricyanide processing compared with cadmium treatment had no obvious change. Cadmium toxic resulted in an obvious chlorosis of leaves, however, SNP additive treatment increased the pigment content, and improved net photosynthetic rate, transpiration rate, and stomatal conductance. Meanwhile, SNP could increase activities of antioxidant enzymes and antioxidant capacity and decrease contents of MDA and H2O2.

关 键 词：黄瓜 镉胁迫 一氧化氮 铁氰化钾 缓解效应 

分 类 号：S642.2[农业科学—蔬菜学]