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Eugenol enhances the resistance of tomato against tomato yellow leaf curl virus
Author(s) -
Wang Chunmei,
Fan Yongjian
Publication year - 2013
Publication title -
journal of the science of food and agriculture
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.782
H-Index - 142
eISSN - 1097-0010
pISSN - 0022-5142
DOI - 10.1002/jsfa.6304
Subject(s) - eugenol , tomato yellow leaf curl virus , polyphenol oxidase , elicitor , biology , salicylic acid , phenylalanine ammonia lyase , horticulture , systemic acquired resistance , plant disease resistance , whitefly , peroxidase , plant virus , botany , virus , chemistry , enzyme , biochemistry , virology , organic chemistry , arabidopsis , gene , mutant
Abstract BACKGROUND Tomato yellow leaf curl virus disease ( TYLCVD ) causes severe to economic losses in tomato crops in China. The control of TYLCVD is based primarily on the use of synthetic insecticide to control its vector whitefly ( Bemisia tabaci ). To look for an alternative method for disease control, we investigated the effect of eugenol on controlling TYLCVD . The potential of eugenol to trigger systemic acquired resistance ( SAR ) in tomato (Jiangsu 14) plants against TYLCV was also investigated . RESULTS In greenhouse experiments, eugenol significantly reduced disease severity when applied as a foliar spray, thus demonstrating a systemic effect. The disease spread rapidly in control plants and by the end of the experiment almost all control plants showed severe symptoms. Eugenol also induced H 2 O 2 accumulation in tomato plants. Activities of peroxidase ( POD ), polyphenol oxidase ( PPO ) and phenylalanine ammonia lyase ( PAL ) were significantly induced compared with those of control plants. As further consequences, increase of salicylic acid ( SA ) levels and expression of PR‐1 proteins, a molecular marker of SAR in tomato, could also be observed . CONCLUSION This is the first report of eugenol as an elicitor and its ability to suppress plant virus diseases under greenhouse conditions. It is suggested that eugenol has the potential to be an effective biocontrol agent against TYLCV in tomato plants. © 2013 Society of Chemical Industry