Do Plant Phenolics Confer Resistance to Specialist and Generalist Insect Herbivores?

J. L. Bi, G. W. Felton, J. B. Murphy, P. A. Howles, R. A. Dixon, C. J. Lamb

Research output: Contribution to journalArticle

56 Citations (Scopus)

Abstract

The impact of phenolics on a specialist herbivore, Manduca sexta, and a generalist herbivore, Heliothis virescens, was investigated using transgenic tobacco with differential expression of phenylalanine ammonia-lyase. Foliar phenolics such as chlorogenic acid, rutin, and total flavonoids differentially accumulated in the respective transgenic tobacco lines; the amount of chlorogenic acid ranged from 201 to 2202 μg g-1 of fresh leaf, that of total flavonoids from 211 to 500 μg g-1 of fresh leaf, and that of rutin from 73 to 172 μg g-1 of fresh leaf. However, the levels of the phenolics and larval growth of M. sexta or H. virescens were not significantly correlated. Likewise, phenolic levels were not correlated with larval survival of M. sexta. These results suggest that plant phenolics are not a determining factor for host plant resistance against these insects in this system.

Original languageEnglish (US)
Pages (from-to)4500-4504
Number of pages5
JournalJournal of agricultural and food chemistry
Volume45
Issue number11
DOIs
StatePublished - Nov 1997

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Manduca
Chlorogenic Acid
Rutin
Herbivory
Tobacco
Manduca sexta
Flavonoids
Insects
herbivores
Heliothis virescens
Phenylalanine Ammonia-Lyase
rutin
chlorogenic acid
insects
tobacco
flavonoids
genetically modified organisms
leaves
phenylalanine ammonia-lyase
host plants

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Agricultural and Biological Sciences(all)

Cite this

Bi, J. L. ; Felton, G. W. ; Murphy, J. B. ; Howles, P. A. ; Dixon, R. A. ; Lamb, C. J. / Do Plant Phenolics Confer Resistance to Specialist and Generalist Insect Herbivores?. In: Journal of agricultural and food chemistry. 1997 ; Vol. 45, No. 11. pp. 4500-4504.
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Do Plant Phenolics Confer Resistance to Specialist and Generalist Insect Herbivores? / Bi, J. L.; Felton, G. W.; Murphy, J. B.; Howles, P. A.; Dixon, R. A.; Lamb, C. J.

In: Journal of agricultural and food chemistry, Vol. 45, No. 11, 11.1997, p. 4500-4504.

Research output: Contribution to journalArticle

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AU - Felton, G. W.

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