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231225s2019 xx |||||o 00| ||eng c |
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|a 10.1093/jxb/erz163
|2 doi
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|a pubmed24n0992.xml
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|a (DE-627)NLM297902997
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|a (NLM)31173098
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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| 100 |
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|a Leybourne, Daniel J
|e verfasserin
|4 aut
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| 245 |
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|a Defence gene expression and phloem quality contribute to mesophyll and phloem resistance to aphids in wild barley
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|c 2019
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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| 338 |
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|a ƒa Online-Ressource
|b cr
|2 rdacarrier
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| 500 |
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|a Date Completed 20.07.2020
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| 500 |
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|a Date Revised 20.07.2020
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|a published: Print
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|a Citation Status MEDLINE
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|a © The Author(s) 2019. Published by Oxford University Press on behalf of the Society for Experimental Biology. All rights reserved. For permissions, please email: journals.permissionsoup.com.
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|a Aphids, including the bird cherry-oat aphid (Rhopalosiphum padi), are significant agricultural pests. The wild relative of barley, Hordeum spontaneum 5 (Hsp5), has been described to be partially resistant to R. padi, with this resistance proposed to involve higher thionin and lipoxygenase gene expression. However, the specificity of this resistance to aphids and its underlying mechanistic processes are unknown. In this study, we assessed the specificity of Hsp5 resistance to aphids and analysed differences in aphid probing and feeding behaviour on Hsp5 and a susceptible barley cultivar (Concerto). We found that partial resistance in Hsp5 to R. padi extends to two other aphid pests of grasses. Using the electrical penetration graph technique, we show that partial resistance is mediated by phloem- and mesophyll-based resistance factors that limit aphid phloem ingestion. To gain insight into plant traits responsible for partial resistance, we compared non-glandular trichome density, defence gene expression, and phloem composition of Hsp5 with those of the susceptible barley cultivar Concerto. We show that Hsp5 partial resistance involves elevated basal expression of thionin and phytohormone signalling genes, and a reduction in phloem quality. This study highlights plant traits that may contribute to broad-spectrum partial resistance to aphids in barley
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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| 650 |
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4 |
|a Hordeum spontaneum
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| 650 |
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4 |
|a Rhopalosiphum padi
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| 650 |
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4 |
|a Sitobion avenae
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| 650 |
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4 |
|a Utamphorophora humboldti
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| 650 |
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4 |
|a Amino acid composition
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| 650 |
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4 |
|a defence gene expression
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| 650 |
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4 |
|a electrical penetration graph (EPG)
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| 650 |
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4 |
|a partial resistance
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| 700 |
1 |
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|a Valentine, Tracy A
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Robertson, Jean A H
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Pérez-Fernández, Estefania
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Main, Angela M
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Karley, Alison J
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Bos, Jorunn I B
|e verfasserin
|4 aut
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| 773 |
0 |
8 |
|i Enthalten in
|t Journal of experimental botany
|d 1985
|g 70(2019), 15 vom: 07. Aug., Seite 4011-4026
|w (DE-627)NLM098182706
|x 1460-2431
|7 nnns
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| 773 |
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|g volume:70
|g year:2019
|g number:15
|g day:07
|g month:08
|g pages:4011-4026
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| 856 |
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|u http://dx.doi.org/10.1093/jxb/erz163
|3 Volltext
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|d 70
|j 2019
|e 15
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|c 08
|h 4011-4026
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