Arthropod-Plant Interactions (2016) 10, 101-111

Sara Mehrabi, Inger Åhman and Lisbeth M.V. Jonsson (2016)
The constitutive expression and induction of three ß-1,3-glucanases by bird cherry-oat aphid in relation to aphid resistance in 15 barley breeding lines
Arthropod-Plant Interactions 10 (2), 101-111
Abstract: In this study, 15 closely related barley genotypes were analyzed for the abundance of three ß-1,3-glucanase transcripts immediately before and during infestation by the bird cherry-oat aphid (Rhopalosiphum padi L.). The barley lines are doubled haploid lines in backcross (BC) generations BC1 and BC2 from a cross between cultivar Lina and a wild barley accession. Previously, they have been characterized as susceptible (S) or resistant (R) to R. padi based on their ability to support nymphal growth. Here we also tested whether resistance was manifested as reduced aphid settling on the plants. Indeed, aphid numbers were lower on R than on S lines in all cases where there were significant differences between R and S lines. The choice of ß-1,3-glucanase sequences is based on earlier results comparing two S and two R genotypes, suggesting that at least two of the three studied sequences are susceptibility factors. The comparisons of transcript abundance in plants with aphids showed for two of the ß-1,3-glucanase sequences that there were several cases where an S genotype had significantly higher abundance than an R genotype, and in no case did an R line have significantly higher abundance than an S line. Thus, there was some support for the idea that ß-1,3-glucanase sequences are susceptibility factors in the interaction between barley and R. padi.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Lisbeth M.V. Jonsson, Inger Åhman

Research topic(s) for pests/diseases/weeds:
resistance/tolerance/defence of host

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Rhopalosiphum padi	Barley (Hordeum vulgare)