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Aphid acceptance of barley exposed to volatile phytochemicals differs between plants exposed in daylight and darkness

Glinwood, Robert and Gradin, Therese and Karpinska, Barbara and Ahmed, Elham and Jonsson, Lisbeth and Ninkovic, Velemir (2007). Aphid acceptance of barley exposed to volatile phytochemicals differs between plants exposed in daylight and darkness. Plant signaling & behavior. 2:5, 205-210
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Official URL: http://dx.doi.org/10.4161/psb.2.5.4494

Abstract

It is well known that volatile cues from damaged plants may induce resistance in
neighboring plants. Much less is known about the effects of volatile interaction between
undamaged plants. In this study, barley plants, Hordeum vulgare cv. Kara, were exposed
to volatiles from undamaged plants of barley cv. Alva or thistle Cirsium vulgare, and
to the volatile phytochemicals, methyl salicylate or methyl jasmonate. Exposures were
made either during natural daylight or darkness. Acceptance of exposed plants by the
aphid Rhopalosiphum padi was assessed, as well as the expression of putative marker
genes for the different treatments. Aphid acceptance of plants exposed to either barley or
C. vulgare was significantly reduced, and an effect of the volatiles from undamaged
plants was confirmed by the induction of pathogenesis‑related protein, PR1a in exposed
plants. However the effect on aphid acceptance was seen only when plants were exposed
during darkness, whereas PR1a was induced only after treatment during daylight. Aphid
acceptance of plants exposed to either methyl salicylate or methyl jasmonate was significantly
reduced, but only when plants were exposed to the chemicals during daylight.
AOS2 (allene oxide synthase) was induced by methyl jasmonate and BCI‑4 (barley
chemical inducible gene‑4) by methyl salicylate in both daylight and darkness. It is
concluded that (a) the effects on aphids of exposing barley to volatile phytochemicals was
influenced by

Authors/Creators:Glinwood, Robert and Gradin, Therese and Karpinska, Barbara and Ahmed, Elham and Jonsson, Lisbeth and Ninkovic, Velemir
Title:Aphid acceptance of barley exposed to volatile phytochemicals differs between plants exposed in daylight and darkness
Series/Journal:Plant signaling & behavior (1559-2316)
Year of publishing :2007
Volume:2
Number:5
Page range:205-210
Publisher:Landes Bioscience
ISSN:1559-2316
Language:English
Publication Type:Journal article
Refereed:Yes
Article category:Scientific peer reviewed
Version:Published version
Full Text Status:Public
Agris subject categories.:H Protection of plants and stored products > H10 Pests of plants
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Botany
(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Ecology
(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 404 Agricultural Biotechnology > Plant Biotechnology
Keywords:methyl salicylate, methyl jasmonate, Aphids
URN:NBN:urn:nbn:se:slu:epsilon-e-813
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-e-813
ID Code:9339
Department:(NL, NJ) > Dept. of Ecology
(S) > Dept. of Ecology
External funders:MISTRA
Deposited By: Dr Robert Glinwood
Deposited On:19 Dec 2012 14:05
Metadata Last Modified:02 Dec 2014 10:54

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