Both the anterior and posterior eyes function as photoreceptors for photoperiodic termination of diapause in the two-spotted spider mite.
J Comp Physiol A Neuroethol Sens Neural Behav Physiol
; 200(2): 161-7, 2014 Feb.
Article
em En
| MEDLINE
| ID: mdl-24309746
ABSTRACT
Photoreceptors involved in photoperiodism in insects and mites can be either the retinal photoreceptors in the visual system or nonvisual extraretinal photoreceptors. Mites with no eyes have a clear photoperiodic response, suggesting the involvement of extraretinal photoreceptors in mite photoperiodism. In mites equipped with eyes, however, it is not known whether the retinal or extraretinal photoreceptors are involved in photoperiodism. The two-spotted spider mite Tetranychus urticae possesses two pairs of eyes. Adult females of this species terminate diapause in response to long days. To investigate whether the eyes function as photoperiodic photoreceptors in T. urticae, their eyes were ablated using a laser ablation system. Mites with their eyes intact terminated diapause under long days after low temperature exposure, whereas they remained in diapause under short days. Under constant darkness, they did not terminate diapause. When all eyes were removed, the mites remained in diapause even when they were maintained under long days. In contrast, the mites showed clear photoperiodic response when only the anterior or posterior eyes were removed. These results indicate that both the anterior and posterior eyes function as photoreceptors in photoperiodic termination of diapause in T. urticae.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Células Fotorreceptoras
/
Aranhas
/
Neuropeptídeos
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Fotoperíodo
/
Olho
Limite:
Animals
Idioma:
En
Revista:
J Comp Physiol A Neuroethol Sens Neural Behav Physiol
Assunto da revista:
CIENCIAS DO COMPORTAMENTO
/
NEUROLOGIA
Ano de publicação:
2014
Tipo de documento:
Article
País de afiliação:
Japão