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Inhibition of insect larval growth by phenolics in glandular trichomes of tomato leaves

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Summary

We have found that the foliar tetracellular glandular trichomes (tetrads) of the tomato plant,Lycopersicon esculentum Mill., contribute significantly to the antibiotic effect of the leaf against the fruitwormHeliothis zea (Boddie), as measured by reduction in larval growth. This effect is attributable to phenolic compounds localized within the tetrads. We have found that the cellular fluid of the tetrads is particularly rich in the flavonol glycoside rutin, accompanied by lesser amounts of other phenolics.

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Authors and Affiliations

  1. Department of Entomology, University of California, 95616, Davis, Ca., USA

    S. S. Duffey & M. B. Isman

Authors
  1. S. S. Duffey
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  2. M. B. Isman
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Acknowledgments. Supported by CFMTAB grant No. 21, and USDA-SEA grant No. 5901-0269. We thank Shell Development Company of Modesto, California, for supplying eggs ofH. zea, J. S. Rolston for preparation of the figures, and B. C. Campbell for the SEM photograph in fig. 1.

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Duffey, S.S., Isman, M.B. Inhibition of insect larval growth by phenolics in glandular trichomes of tomato leaves. Experientia 37, 574–576 (1981). https://doi.org/10.1007/BF01990057

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