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Abstract The physiological and biochemical indexes were studied in cucumber（Cucumis sativus L.）seedlings
grafted on six rootstock varieties and selfrooted cucumbers under NaCl stress of different
concentrations.The results showed that the photosynthetic characteristics(Pn,Gs and Ci),the protective
enzymes(SOD,POD,CAT,APX)activities，the contents of osmotic adjustment substance(Pro,soluble sugar and
soluble protein)in the leaves of the grafted plants were higher than those in the leaves of self-rooted
plants,while the electrotyle leakage and the content of MDA is lower.NaCl resistance of cucumber seedlings
grafted on different rootstocks were different,and the salt tolerance ability is‘Juejinglong’>‘DTT-RS-39’
>‘Modified Huofenghuang’>‘Huofenghuang’>‘Black seed pumpkin’>‘Youqingtaimu’.
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