Effect of previous exposure to hydroxamic acids in probing behavior of aphid Sitobion fragariae on wheat seedlings
Author
dc.contributor.author
Ramírez, Claudio C.
Author
dc.contributor.author
Caballero, Paula P.
Author
dc.contributor.author
Niemeyer, Hermann M.
Admission date
dc.date.accessioned
2018-12-20T14:10:49Z
Available date
dc.date.available
2018-12-20T14:10:49Z
Publication date
dc.date.issued
1999
Cita de ítem
dc.identifier.citation
Journal of Chemical Ecology, Volumen 25, Issue 4, 2018, Pages 771-779
Identifier
dc.identifier.issn
00980331
Identifier
dc.identifier.other
10.1023/A:1020836515674
Identifier
dc.identifier.uri
https://repositorio.uchile.cl/handle/2250/154442
Abstract
dc.description.abstract
We hypothesized that aphids after previous exposure to hydroxamic acids (Hx), a family of secondary plant compounds deleterious to aphids, are able to reduce their subsequent exposure to them. This hypothesis was tested by evaluating the time to produce salivation into a sieve element (SSE) by the aphid Sitobion fragariae on seedlings of two wheat cultivars of Triticum aestivum differing in their concentration of Hx. The total time to produce a first SSE was significantly longer in the high-Hx cultivar; however, the subsequent, second SSE (first SSE after interruption of probing) in this cultivar was significantly reduced, reaching the level observed in the low- Hx plants. Therefore, a strategy to reduce the exposure to secondary compounds was observed only in the second SSE in high-Hx plants. When the experimental plant was replaced by a new unattacked plant after the first SSE, aphids did not change the behavior described, thus excluding an aphid- induced plant susceptibility. The nu