期刊
INSECT MOLECULAR BIOLOGY
卷 26, 期 5, 页码 654-664出版社
WILEY
DOI: 10.1111/imb.12326
关键词
Ptth; aphids; sexual response; photoperiodism; in situ localization; neuropeptide
资金
- Spanish MINECO (Ministerio de Economia y Competitividad) [CGL2015-68188-P]
- Spanish Ministerio de Ciencia e Innovacion (MICINN) [BES-2009-026077]
- United States Department of Agriculture - National Institute of Food and Agriculture (USDA-NIFA) [2010-65105-20558]
- Genome Analyses Centre Capacity and Capability Challenge programme from the Biotechnology and Biological Sciences Research Council [CCC-15, BB/J004553/1]
- John Innes Foundation
Insect hormones control essential aspects of physiology, behaviour and development in insects. The majority of insect hormones are peptide hormones that perform a highly diverse catalogue of functions. Prothoracicotropic hormone (PTTH) is a brain neuropeptide hormone whose main function is to stimulate the secretion of ecdysone (the moulting hormone) by the prothoracic glands in insect larvae thus playing a key role in the control of moulting and metamorphosis. Moreover, both PTTH release or blockade have been reported to act as a switch to terminate or initiate larval and pupal diapauses. In insects, diapause is a prevalent response often regulated by the photoperiod. It has been shown that PTTH participates as an output of the circadian clock and a role in photoperiodic processes is suggested in some insect species. Aphids (Hemiptera: Aphididae) reproduce by cyclical parthenogenesis with a sexual phase, induced by short photoperiods, that leads to the production of diapausing eggs. With the availability of the pea aphid (Acyrthosiphon pisum) genome, efforts to identify and characterize genes relevant to essential aspects of aphid biology have multiplied. In spite of its relevance, several genomic and transcriptomic studies on aphid neuropeptides failed to detect aphid PTTH amongst them. Here we report on the first identification of the aphid PTTH coding gene and the neuroanatomical localization of its expression in the aphid brain.
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