Abstract
Myzus persicae has severe economic impact on pepper (Capsicum) cultivation. Previously, we identified two populations of M. persicae, NL and SW, that were avirulent and virulent, respectively on C. baccatum accession PB2013071. The transcriptomics approach used in the current study, which is the first study to explore the pepper−aphid interaction at the whole genome gene expression level, revealed genes whose expression is differentially regulated in pepper accession PB2013071 upon infestation with these M. persicae populations. The NL population induced ROS production genes, while the SW population induced ROS scavenging genes and repressed ROS production genes. We also found that the SW population can induce the removal of ROS which accumulated in response to preinfestion with the NL population, and that preinfestation with the SW population significantly improved the performance of the NL population. This paper supports the hypothesis that M. persicae can overcome the resistance in accession PB2013071 probably because of its ability to manipulate plant defense response especially the ROS metabolism and such ability may benefit avirulent conspecific aphids.
Highlights
Aphids, which belong to the order of Hemiptera, are one of the most destructive plant pests worldwide
RNA isolated from plants of accession PB2013071 treated with aphids of NL population (NL-infested), SW population (SW-infested) or empty clip cages for 6 h was subjected to RNA-seq analysis
All the datasets have been submitted to European Nucleotide Archive (ENA)
Summary
Aphids, which belong to the order of Hemiptera, are one of the most destructive plant pests worldwide. Among the more than 4000 described aphid species, over 100 species are reported as economically important pests and are able to damage plant health[1]. Most aphid species reproduce asexually under suitable conditions, which leads to rapid population expansion and to difficulties in population control[1]. Given the fact that aphids have severe negative effects on crop cultivation, the frequent use of chemical pesticides is the major management strategy[3]. With growing concern about the negative impact of pesticides on the environment, integrated pest management such as promoting aphid resistant varieties is more and more encouraged[4].
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