Abstract: The objective of this study was to investigate the relationship of seed hypergravity treatment and cucumber salt tolerance.Effect of seed hypergravity treatment on cucumber germination,seedling growth and relative physiological indexes under NaCl stress was studied.The result showed that cucumber germination,seedling growth and physiological indexes were significantly inhibited under NaCl stress.After seeds were treated with the hypergravity of 1 000,2 000,3 000×g for 1,2 hours respectively,every index including germination rate,germination index and vigor index significantly improved than the values in NaCl stress,in which effect of 2 000×g,2 h seed hypergravity treatment was the best.Added the strength of hypergravity to 4 000×g,germination rate had not obvious change for 1 hours treatment,every index significantly decreased in other treatments.In seedling period,there was different effect between 2 000×g,2 h seed hypergravity and NaCl combined treatment and sole NaCl treatment.Seedling biomass significantly increased,root activity,chlorophyll content and SOD activity significantly improved,MDA content significantly decreased in combined treatment than in sole NaCl treatment with certain concertration.Seed hypergravity treatment could improved cucumber seed germination and seedling biomass,actively regulated physiological indexes in seedling period under NaCl stress,which alleviated stress injury and strengthened plant salt tolerance.

Key words: Hypergravity treatment, NaCl stress, Cucumber

CLC Number: 

• S642.2