Display Settings:


Send to:

Choose Destination
See comment in PubMed Commons below
Insect Biochem Mol Biol. 2003 Mar;33(3):289-98.

Identification of a gene overexpressed in aphids reared under short photoperiod.

Author information

  • 1Institut Cavanilles de Biodiversitat i Biologia Evolutiva, Universitat de València, Apartado de Correos 22085, 46071, València, Spain.


Most aphids develop a cyclic parthenogenesis life-cycle. After several generations of viviparously produced parthenogenetic females, follows a single annual generation of sexual individuals, usually in autumn, that mate and lay the sexual eggs. Shortening of photoperiod at the end of the summer (together with temperature) is a key factor inducing the sexual response. Currently no genes involved in the cascade of events that lead to the appearance of sexual forms have been reported. After a Differential Display RT-PCR survey performed on Acyrthosiphon pisum aphids, we identified a gene that is overexpressed in aphids reared under short photoperiod conditions that induce sexuality in this species. This cDNA (called ApSDI-1) shows similarities with a protein involved in amino acid transport in GABAergic neurons. Since several studies implicate GABAergic transmission in the generation and modulation of circadian rhythmicity, we propose that ApSDI-1 could be involved in the transduction of the photoperiodic message and therefore be a candidate to participate at some point in processes that trigger the sexual response in aphids. This is the first gene identified in aphids whose expression is governed by the photoperiod.

[PubMed - indexed for MEDLINE]
PubMed Commons home

PubMed Commons

How to join PubMed Commons

    Supplemental Content

    Icon for Elsevier Science
    Loading ...
    Write to the Help Desk