Feeding by the aphid sipha flava produces a reddish spot on leaves of sorghum halepense: an induced defense?
Author
dc.contributor.author
Costa Arbulú, César
Author
dc.contributor.author
Gianoli, Ernesto
es_CL
Author
dc.contributor.author
González, Wilfredo L.
es_CL
Author
dc.contributor.author
Niemeyer Marich, August
es_CL
Admission date
dc.date.accessioned
2013-12-30T19:45:23Z
Available date
dc.date.available
2013-12-30T19:45:23Z
Publication date
dc.date.issued
2001
Cita de ítem
dc.identifier.citation
Journal of Chemical Ecology, Vol. 27, No. 2, 2001
en_US
Identifier
dc.identifier.uri
https://repositorio.uchile.cl/handle/2250/119636
Abstract
dc.description.abstract
Feeding by the aphid Sipha flava produces a reddish spot
on mature leaves of Sorghum halepense. The present work is aimed at
determining whether this plant response entails induced resistance against
the aphid. Old and young leaves showed the same response to aphid
feeding (reddish coloration). Water-stressed plants displayed a similar reddish
coloration to aphid-infested plants. This was verified by evaluation of
absorbance peaks of the respective leaf extracts. Aphid fecundity was
reduced on previously infested (and hence reddish colored) leaves. However,
aphid fecundity was not affected on water stressed plants. Furthermore,
aphid survival was not different on artificial diets containing increasing
concentrations of the reddish pigment. It is concluded that the reddish spot
is correlated with, but is not itself responsible for, the observed induced
resistance of S. halepense against S. flava.