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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Methyl Jasmonate Increases the Tropane Alkaloid Scopolamine and Reduces Natural Herbivory in Brugmansia suaveolens: Is Scopolamine Responsible for Plant Resistance?

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Author(s):
Arab, A. [1, 2] ; Alves, M. N. [3] ; Sartoratto, A. [3] ; Ogasawara, D. C. [3] ; Trigo, J. R. [1]
Total Authors: 5
Affiliation:
[1] Inst Biol, Dept Biol Anim, Lab Ecol Quim, BR-13083970 Campinas, SP - Brazil
[2] Univ Fed Alfenas, Inst Ciencias Nat, Alfenas, MG - Brazil
[3] Univ Estadual Campinas, Ctr Pluridisciplinar Pesquisas Quim Biol & Agr, Campinas, SP - Brazil
Total Affiliations: 3
Document type: Journal article
Source: Neotropical Entomology; v. 41, n. 1, p. 2-8, FEB 2012.
Web of Science Citations: 4
Abstract

The tropane alkaloid (TA) scopolamine is suggested to protect Brugmansia suaveolens (Solanaceae) against herbivorous insects. To test this prediction in a natural environment, scopolamine was induced by methyl jasmonate (MJ) in potted plants which were left 10 days in the field. MJ-treated plants increased their scopolamine concentration in leaves and herbivory decreased. These findings suggest a cause-effect relationship. However, experiments in laboratory showed that scopolamine affect differently the performance of the specialist larvae of the ithomiine butterfly Placidina euryanassa (C. Felder \& R. Felder) and the generalist fall armyworm Spodoptera frugiperda (J. E. Smith): the specialist that sequester this TA from B. suaveolens leaves was not negatively affected, but the generalist was. Therefore, scopolamine probably acts only against insects that are not adapted to TAs. Other compounds that are MJ elicited may also play a role in plant resistance against herbivory by generalist and specialist insects, and deserve future investigations. (AU)

FAPESP's process: 07/07607-7 - Tropane alkaloids of Brugmansia suaveolens: effect in the trophic interactrion with specialist and generalist herbivores and their natural enemies
Grantee:Jose Roberto Trigo
Support Opportunities: Regular Research Grants
FAPESP's process: 06/07304-1 - Induced responses in Brugmansia suaveolens (Solanaceae) and tritrophic interactions: the role of tropane alkaloids
Grantee:Alberto José Arab Olavarrieta
Support Opportunities: Scholarships in Brazil - Post-Doctoral