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| Relationship between Tomato Leaf Wax and Cutin Layers with Infection by Helminthosporium carposaprum |
| KANG Li-gong，QI Feng-kun，XU Xiang-yang，LI Jing-fu |
| Tomato research laboratory of Department of horticulture Northeast Agricultural University，Harbin 150030，China |
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Abstract When the Wax in tomato leaves was removed with chloroform or the cutin layer was removed with KOH or cutinase，fungal infection rate in tomato leaves，was significantly increased.There was no significant difference in Helminthosporium carposaprum infection rate between leaves whose wax and Cutin within were removed at the same time and leaves damaged by pin puncturing，indicating that the major anti-disease components in leaves were wax and cutin.Wax extract in leaves antibacterial effect was not significant in vitro.Wax resistance role is mainly to prevent physical penetration Helminthosporium carposaprum.
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Received: 29 December 2009
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