Mar 11, 2020

Dopamine pathway characterization during the reproductive mode switch in the pea aphid

bioRxiv
Gael LE TRIONNAIREDenis Tagu

Abstract

Aphids are major pests of most of the crops worldwide. Such a success is largely explained by the remarkable plasticity of their reproductive mode. They reproduce efficiently by parthenogenesis during spring and summer generating important damage on crops. At the end of the summer, asexual females perceive the photoperiod shortening and transduce this signal towards their embryos that change their reproductive fate to produce sexual individuals: males and oviparous females. After mating, those sexual oviparous females lay cold-resistant eggs. Previous studies based on large-scale transcriptomic analyses suggested that dopamine pathway might be a key player in the integration of decrease of the autumnal photoperiodic signal to promote the switch of embryonic germline fate. In this study, we investigated the role of dopamine pathway in the photoperiodic response of the pea aphid Acyrthosiphon pisum. We first analysed the level of expression of ten genes of this pathway in heads and embryos of aphids reared under long-days (asexual producers) or short-days (sexual producers). We then performed in situ hybridization experiments to localize in embryos the ddc and pale transcripts that are coding for two rate-limiting enzymes in dopa...Continue Reading

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Mentioned in this Paper

Study
Genes
Drug Resistance
Acyrthosiphon pisum
Ovum
Mutagenesis Process
Introns
Reproduction
DDC
Signal Pathways

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