De Novo Biosynthesis of Volatiles Induced by Insect Herbivory in Cotton Plants

  • Pare P
  • Tumlinson J
  • 74

    Readers

    Mendeley users who have this article in their library.
  • 320

    Citations

    Citations of this article.

Abstract

In response to insect feeding on the leaves, cotton (Gossypium hirsutum L.) plants release elevated levels of volatiles, which can serve as a chemical signal that attracts natural enemies of the herbivore to the damaged plant. Pulse-labeling experiments with ['3C]C0, demonstrated that many of the volatiles released, including the acyclic terpenes (E,D-cY-farnesene, (0-p-farnesene, (0-pocimene, linalool, (€)-4,8-dimethyl-l,3,7-nonatriene, and (E,€)- 4,8,1 Z-trimethyl-l,3,7,1l-tridecatetraene, as well as the shikimate pathway product indole, are biosynthesized de novo following insect damage. However, other volatile constituents, including severa1 cyclic terpenes, butyrates, and green leaf volatiles of the lipoxygenase pathway are released from storage or synthesized from stored intermediates. Analysis of volatiles from artificially damaged plants, with and without beet armyworm (Spodoptera exigua Hiibner) oral secretions exogenously applied to the leaves, as well as volatiles from beet armyworm-damaged and -undamaged control plants, demonstrated that the application of caterpillar oral secretions increased both the production and release of several volatiles that are synthesized de novo in response to insect feeding. These results establish that the plant plays an active and dynamic role in mediating the interaction between herbivores and natural enemies of herbivores.

Get free article suggestions today

Mendeley saves you time finding and organizing research

Sign up here
Already have an account ?Sign in

Find this document

Authors

  • P. W. Pare

  • J. H. Tumlinson

Cite this document

Choose a citation style from the tabs below

Save time finding and organizing research with Mendeley

Sign up for free