Characteristics of hydroxamic acid induction in wheat triggered by aphid infestation
Author
dc.contributor.author
Gianoli, Ernesto
Author
dc.contributor.author
Niemeyer, Hermann M.
Admission date
dc.date.accessioned
2018-12-20T14:32:19Z
Available date
dc.date.available
2018-12-20T14:32:19Z
Publication date
dc.date.issued
1997
Cita de ítem
dc.identifier.citation
Journal of Chemical Ecology, Volumen 23, Issue 12, 2018, Pages 2695-2705
Identifier
dc.identifier.issn
00980331
Identifier
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10.1023/A:1022554708782
Identifier
dc.identifier.uri
https://repositorio.uchile.cl/handle/2250/156348
Abstract
dc.description.abstract
Hydroxamic acids (Hx) are natural products of Gramineae that are associated with cereal resistance to pests. We aimed at characterizing the induction of Hx accumulation in seedlings of wheat. Triticum aestivum, by short-term infestation of the cereal aphid, Rhopalosiphum padi. A load of 25 aphids increased significantly the Hx levels in the infested primary leaf in comparison with control levels. Lower loads did not increase Hx concentration. Aphid infestation lasting 16 hr did not elicit induction of Hx, even after a time-lag of 32 hr to allow the expression of any induced response. Forty-eight hours was the minimum duration of aphid infestation required to trigger Hx induction. The age of the infested tissue (the primary leaf) did not affect induction. Similar increases of Hx were found in unfolding, expanding, and totally expanded primary leaves. It was determined that the regime of nutrient supply (N-intensive nutritive solutions at low and high concentration) to wheat seedlings ha