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Effects of Cinnamic Acid on Cucumber Seedlings Growth and Rhizosphere Soil Enzyme Activities under Salt Stress |
Li Xueqiao Wu Fengzhi* |
Horticulture College of Northeast Agricultural University,Harbin Heilongjiang 150030,China |
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Abstract Salt-tolerant cucumber cultivar(Jinyou No.5)and salt-sensitive cucumber cultivar(Jinyou No.1)were used as materials,and NaCl(585 mg•kg-1)as the salt-stress condition,effect of different concentrations of cinnamic acid(0,25,50,200 mg•kg-1)under salt stress condition on cucumber seedlings growth and rhizosphere soil enzymes activities were studied.Results showed that salt-stress treatment reduced the cucumber seedling stem diameter, plant height,dry and fresh weight.And the same results on rhizosphere soil catalase,invertase and urease activities but peroxidase activity.Low concentration of cinnamic acid(25 mg•kg-1)has promoting effects on soil catalase,invertase and urease activities,having some mitigation effect on salt injury;high concentrations of cinnamic acid(200 mg•kg-1)has inhibitory effects on catalase,invertase and urease activities.F-test results show that,cinnamic acid having higher effect on soil enzyme activities and salt stress on the growth.
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Received: 22 April 2010
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