21382108
not annotated - annotated - LINNAEUS only
Responses of the pea aphid transcriptome to infection by facultative symbionts.
Serratia symbiotica is a facultative symbiont of pea aphids (Acyrthosiphon pisum) that provides tolerance to heat stress. Although the phenotypic effects of facultative symbionts upon hosts have been studied in some detail, little is known about the molecular and genomic basis of these interactions. Previous studies show a large impact of S. symbiotica upon the aphid metabolome. Whole-genome transcriptional profiling and next-generation sequencing demonstrated expression of 94% of RefSeq genes from the pea aphid genome, providing the largest dataset to date on aphid gene expression. However, only 28 genes showed changes in expression with S. symbiotica infection, and these changes were of small magnitude. No expression differences in genes involved in innate immunity in other insects were observed. Therefore, the large metabolic impact of S. symbiotica is most likely a result of metabolism of the symbiont itself, or of post-transcriptional modification of host gene expression. Although S. symbiotica has a major influence on its host's metabolome and resistance to heat, it induces little change in gene expression in its host.
Ann file
T1 Species 17 26 pea aphid
N1 Reference T1 Taxonomy:7029
T2 Species 81 100 Serratia symbiotica
N2 Reference T2 Taxonomy:138074
T3 Species 130 140 pea aphids
N3 Reference T3 Taxonomy:7029
T4 Species 142 161 Acyrthosiphon pisum
N4 Reference T4 Taxonomy:7029
T5 Species 422 435 S. symbiotica
N5 Reference T5 Taxonomy:138074
T6 Species 589 598 pea aphid
N6 Reference T6 Taxonomy:7029
T7 Species 728 741 S. symbiotica
N7 Reference T7 Taxonomy:138074
T8 Species 932 945 S. symbiotica
N8 Reference T8 Taxonomy:138074
T9 Species 1082 1095 S. symbiotica
N9 Reference T9 Taxonomy:138074