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Juvenile hormone titre and related gene expression during the change of reproductive modes in the pea aphid

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Title: Juvenile hormone titre and related gene expression during the change of reproductive modes in the pea aphid
Authors: Ishikawa, Asano Browse this author
Ogawa, Kota Browse this author
Gotoh, Hiroki Browse this author
Walsh, Thomas K. Browse this author
Tagu, Denis Browse this author
Brisson, Jennifer A. Browse this author
Rispe, Claude Browse this author
Jaubert-Possamai, Stéphanie Browse this author
Kanbe, Takashi Browse this author
Tsubota, Takuya Browse this author
Shiotsuki, Takahiro Browse this author
Miura, Toru Browse this author →KAKEN DB
Keywords: Polyphenism
juvenile hormone
juvenile hormone esterase
cyclical parthenogenesis
Issue Date: Feb-2012
Publisher: Wiley-Blackwell
Journal Title: Insect Molecular Biology
Volume: 21
Issue: 1
Start Page: 49
End Page: 60
Publisher DOI: 10.1111/j.1365-2583.2011.01111.x
PMID: 21988597
Abstract: Most aphids show reproductive polyphenism, i.e. they alternate their reproductive modes from parthenogenesis to sexual reproduction in response to short photoperiods. Although juvenile hormone (JH) has been considered a likely candidate for regulating the transition from asexual to sexual reproduction after photoperiod sensing, there are few studies investigating the direct relationship between JH titers and the reproductive mode change. In addition, the sequencing of the pea aphid genome has allows identification of the genes involved in the JH pathway which then allows us to examine their expression levels in relation to the reproductive-mode switch. Using LC-MS in the pea aphid, JHIII titer was shown to be lower in aphids producing sexual morphs under short-days than in aphids producing parthenogenetic morphs in long-days. The expression levels of genes upstream and downstream of JH action were quantified by real-time qRT-PCR across the reproductive mode change. The expression level of JH esterase (JHE), which is responsible for JH degradation, was significantly higher in aphids reared under short-days. This suggests that the up-regulation of the JH degradation pathway may be responsible for the lower JHIII titer in aphids exposed to short-days, leading to the production of sexual morphs.
Rights: The definitive version is available at
Type: article (author version)
Appears in Collections:環境科学院・地球環境科学研究院 (Graduate School of Environmental Science / Faculty of Environmental Earth Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 三浦 徹

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