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| Effects of Grafting on Eggplant Growth，Pesticide Residues and Antioxidant Enzyme Activities after Appling Chlorothalonil |
| ZHOU Bao-li，GAO Ping，YE Xue-ling，WANG Hui-chao，WANG Fan-yu，XU Wei-li |
| College of Horticulture，Shenyang Agricultural University，Shenyang 110161，Liaoning，China |
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Abstract The commonly grown eggplant（Solanum melongena L．）cultivar‘Xi’anlvqie’was used as scion．It was grafted with eggplant rootstock（Solanum torvum）．Pesticide residues in fruit and growth index and antioxidant enzyme activities of grafted eggplants and self-rooted eggplants under the conditions of 75% chlorothalonil WP 800 times liquid application were assayed．The results showed that pesticide residues in fruit to grafted eggplants declined 32.07%-100.00% than the self-rooted control．The plant height，stem diameter，fresh weight of aboveground，fresh weight of root，root activity，proline content（Pro），peroxidase（POD）activity，catalase（CAT）activity and phenylalanine ammonia-lyase（PAL）activity of grafted eggplants were all higher than the self-rooted control by 3.82%-24.70%，3.05%-22.47%，11.97%-25.83%，30.95%-57.45%，46.43%- 79.41%，14.93%-40.08%，24.36%- 42.99%，17.09%-39.15%，12.60%- 45.44%，respectively．The relative conductivity and malondialdehyde（MDA）content were lower comparing with the control by 24.31%-52.22% and 22.65%-39.41%，respectively．Therefore，grafting has physiologically increased eggplant in vivo relevant resistance，thus reduced the pesticide residues in eggplant fruit．
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Received: 27 May 2011
Published: 30 June 2011
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