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Effect of Exogenous ABA on Ionic Contents of Cucumber Seedlings under NaCl Stress |
Guo Xiaojun,Xie Chengjun |
(Lanzhou Institute of Agricultural Sciences,Gansu 730070) |
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Abstract The experiment was performed to study the effects of exogenous ABA on Na+Cl-,K+,Ca2+ contents in different organs of cucumber(Cucumis sativus L.)seedlings under NaCl stress.Results showed that Na+ and Cl- contents increased while K+ and Ca2+ contents of leaves decreased,Na+/K+ and Na+/Ca2+ increased,SK、Na and SCa、Na decreased in NaCl-treated cucumber seedlings.Cucumber seedlings treated with exogenous ABA combined with salinity showed higher levels of K+ and Ca2+ accumulation of leaves and lower levels of Na+ and Cl- accumulation of leaves and root.Exogenous ABA could improve the absorbing selectivity of K+ and Ca2+,thus to enhance the salt tolerance of cucumber seedlings.
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Received: 28 March 2008
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