外源亚精胺对盐胁迫下黄瓜幼苗生长和可溶性蛋白表达的影响

Effects of exogenous spermdine (Spd) on growth, the soluble protein content and expression was conducted with salinity- sensitive cucumber (Cucumis sativus L.) cultivar ‘Jinchun No. 2’ by hydroponic culture. Results showed that exogenous Spd significantly increased the growth and the content of soluble protein under 50 mmol•L-1 NaCl stress. Compared with the control, exogenous Spd was not significantly different to growth indexes, but affected significantly soluble protein content in roots. Seven proteins changed obviously at least, such as 67 kD, 61.5 kD, 50 kD, 47 kD, 43 kD, 29 kD and 16 kD protein. In comparion with salt stress, exogenous Spd could decrease significantly the expression of these proteins,61.5kD、47kD and 43 kD,and could not detected 50 kD completely. Exogenous Spd significantly alleviated the injury to seedlings, increased the content of soluble protein and decreased the expression of partial proteins. So it was possible that these proteins have relations with exogenous Spd alleviating the effect of salt stress in cucumber seedlings.