Effects of NaCl Stress on Salt Tolerance of Grafted Cucumber Seedlings

doi:10.7668/hbnxb.2008.02.008

Abstract

Abstract: For clarifying the effect of grafting on cucumber salt tolerance,the activities of protective enzymes,contents of osmotic adjustment substances and photosynthetic characteristics were analysed respectively between grafted and scion-root cucumber seedlings under NaCl stress of 150 mmol/L in sunlight greenhouse.The results showed activities of peroxidase(POD),superoxide dismutase(SOD),ascorbate-specific peroxidase(APX),and content of ascorbic acid(AsA),chlorophyll in leaves of grafted seedlings were significantly higher than those of scion-root seedlings.The content of free proline,soluble protein,soluble suger in the leaves of grafted seedlings were significantly higher than those of scion-root seedlings.Net photosynthetic rate,stomatal conductance,intercellular CO2 concentration of grafted seedlings were significantly higher than those of scion-root seedlings.Malondiadehyde(MDA)content and stomata unitation of grafted seedlinds were lower than those of scion-root seedlings.These results indicated that grafted seedlings could,mprove cucumber salt tolerance under NaCl stress.

Key words: Cucumber, Grafted seedlings, NaCI tolerance

CLC Number:

S642.2

JIANG Tao, HUO Xiu-wen, WANG Shu-ying, LIU Jian-wen, XU Bao-ping. Effects of NaCl Stress on Salt Tolerance of Grafted Cucumber Seedlings[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2008, 23(2): 34-37. doi: 10.7668/hbnxb.2008.02.008.

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