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Titre :
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Differential photoperiodic responses in genetically identical winged and wingless pea aphids, Acyrthosiphon pisum, and the effect of day length on wing development
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Auteurs :
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M. Nunes ;
J. Hardie
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Type de document :
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article/chapitre/communication
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Année de publication :
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1996
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Format :
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339-343
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Langues:
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= Anglais
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Mots-clés:
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aphid
;
Acyrthosiphon pisum
;
photoperiod
;
polymorphism
;
crowding
;
Morphe coloree
;
Morphe ailee
;
Reproduction sexuee
;
Photoperiodisme
;
Aphididae
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Résumé :
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Winged and wingless individuals of a pink clone of the pea aphid, Acyrthosiphon pisum (Harris), showed differences in the response curves for photoperiodic induction of both males and sexual females (oviparae). The critical night length (CNL) for ovipara induction in winged aphids was 0.75 h shorter than in wingless aphids, whereas the CNL for male induction in winged aphids was 1.0 h longer than in wingless aphids. This means that in winged aphids the CNL for male induction in winged aphids was 0.5 h longer than that for ovipara induction, while in wingless aphids the CNL for male induction was 1.0-1.5 h shorter than that for ovipara induction, and also the shapes of the curves differed. Winged aphids were produced by wingless mothers which were crowded as young adults. However, when young adults were crowded in long nights, winged aphids were not produced, and the CNL for wing inhibition was between 9.5 and 10 h. This effect of photoperiod on wing induction was maternal.
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Source :
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Physiological Entomology - 0307-6962, vol. 21, n° 4
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