ISSN:
1573-1561
Keywords:
Perennial ryegrass
;
Lolium perenne
;
Gramineae
;
Argentine stem weevil
;
Listronotus bonariensis
;
Coleoptera
;
Curculionidae
;
Acremonium lolii
;
endophyte
;
feeding deterrent
;
peramine
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
,
Chemistry and Pharmacology
Notes:
Abstract Peramine, a pyrrolopyrazine alkaloid produced by the fungal endophyte of perennial ryegrassAcremonium lolii, deterred the feeding of both adults and larvae of the graminacious herbivore, the Argentine stem weevil (Listronotus bonariensis), at 0.1 μg/g and 10 μg/g, respectively. In a no-choice test fewer stem weevil larvae fed and developed on diet containing as little as 2 μg/g peramine. The proportion of larvae which did not develop beyond the first instar was higher on diet containing peramine and appeared to be due to a higher proportion of larvae which did not feed. For larvae which fed on the peramine-containing diet, feeding scores and times to pupation were not significantly different from those of controls. A number of simple peramine analogues showed feeding-deterrent activity against adult weevils, indicating the importance of the pyrrolopyrazine ring system of peramine in determining feeding-deterrent activity.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01014100
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