Methyl jasmonate increases the tropane alkaloid scopolamine and reduces natural herbivory in Brugmansia suaveolens: is scopolamine responsible for plant resistance?
Neotrop Entomol
; 41(1): 2-8, 2012 Feb.
Article
em En
| MEDLINE
| ID: mdl-23950002
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.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Escopolamina
/
Solanaceae
/
Ciclopentanos
/
Oxilipinas
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Herbivoria
/
Insetos
/
Acetatos
Tipo de estudo:
Prognostic_studies
Limite:
Animals
Idioma:
En
Revista:
Neotrop Entomol
Assunto da revista:
BIOLOGIA
Ano de publicação:
2012
Tipo de documento:
Article
País de afiliação:
Brasil
País de publicação:
Holanda