Bulletin of Entomological Research

Research Article

Exploring plant responses to aphid feeding using a full Arabidopsis microarray reveals a small number of genes with significantly altered expression

C. Couldridgea1, H.J. Newburya1, B. Ford-Lloyda1, J. Balea1 and J. Pritcharda1 c1

a1 School of Biosciences, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK

Abstract

The aim of this study was to determine which Arabidopsis thaliana (L.) genes had significantly altered expression following 2–36 h of infestation by the aphid Myzus persicae (Sulzer). Six biological replicates were performed for both control and treatment at each time point, allowing rigorous statistical analysis of any changes. Only two genes showed altered expression after 2 h (one up- and one down-regulated) while two were down-regulated and twenty three were up-regulated at 36 h. The transcript annotation allowed classification of the significantly altered genes into a number of classes, including those involved in cell wall modification, carbon metabolism and signalling. Additionally, a number of genes were implicated in oxidative stress and defence against other pathogens. Five genes could not currently be assigned any function. The changes in gene expression are discussed in relation to current models of plant-insect interactions.

(Accepted January 30 2007)

Correspondence:

c1 Author for correspondence Fax: 0121 414 5925 E-mail: j.pritchard@bham.ac.uk