Régulation de la température de sous-refroidissement et celle de nucléation de glace dans l'intestin, relative à la diapause de Pyrrhocoris apterus (L.) (Heteroptera).

Temperature regulation of supercooling and gut nucleation in relation to diapause of Pyrrhocoris apterus (L.) (Heteroptera).

Type d'article : Article

Résumé

The decrease of the supercooling point and thus the increase in cold hardiness is regulated by photoperiod and temperature. The relative importance of these factors depends on the physiological state of the insect. The supercooling point is about -7 deg C at the onset of prediapause and a decrease of about 4-5 deg C is associated with the development of the diapause syndrome in adults. The gut was identified as the primary site of ice nucleation because its supercooling point value was very similar to the value for the whole body in both short-day and long-day insects.

Détails

Titre original : Temperature regulation of supercooling and gut nucleation in relation to diapause of Pyrrhocoris apterus (L.) (Heteroptera).
Identifiant de la fiche : 1998-1304
Langues : Anglais
Source : Cryobiology - vol. 34 - n. 1
Date d'édition : 02/1997

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Indexation

Thèmes : Influence du froid sur les cellules, tissus et organes
Mots-clés : Insecte; Glace; Survie; Nucléation; Congélation