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| Experiment on the Effect of Inducing Heat Resistance in Tomato Seedlings by Salicylic Acid |
| WAN Zheng-lin1,LUO Qing-xi2*,LI Li-zhi1 |
| 1Guangxi Demonstration Garden for Modern Agricultural Science and Technology,Nanning 530007,Guangxi,China;2College of Horticulture and Landscape Archtecture,Southwest University,Key Laboratory of Olericulture in Chongqing,Chongqing 400716,China |
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Abstract Using salicylic acid of different concentrations to treat tomato(Lycopersicon esculentum Mill.)seedling,and through testing Pro,REC and MDA,this study found the best concentration in inducing heat resistance of tomato seedling was 60 mg·L-1 by spraying salicylic acid on its leaves.The mechanism of using salicylic acid to induce heat resistance of tomato seedling was initially studied.After the salicylic acid was sprayed on the leave surface,where high activity of SOD,POD,APX were maintain under high temperature stress,which helped to reduce the producing and accumulating of active oxygen and reduce the oxidative stress,therefore enhance the stabilization of cell membrane and improve the heat resistant ability of tomato seedlings.In the role of improving heat resistance of tomato seedlings,the activity of CAT is one of the causes for high temperature stress,but inducing heat resistance by salicylic acid might have nothing to do with activity of CAT.
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Received: 27 March 2009
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