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Abstract:

Triatominae bugs experience changes in the mechanical properties of their cuticle prior to feeding. This process - plasticization - allows a rapid stretching of the unsclerotized abdominal cuticle of triatominae larvae and it is evoked by sensory inputs related to feeding. We tested: (a) whether the cuticle recovers its original mechanical properties after plasticization, (b) whether repeated stimulation would be able to evoke recurrent plasticization along the same larval instar, (c) the temporal course of recovering cuticular stiffness. We injected Ringer solution into the body cavity of the bugs at constant pressure, using the injection rate (ml/min) as a measure of the cuticle extensibility. To trigger plasticization, individuals were allowed to feed on blood from an artificial feeder at 32±2°C. After plasticization occurred, the abdominal cuticle gradually recovered its original mechanical properties. Bugs were capable of plasticizing for a second time when repeatedly stimulated. The effects of plasticization vanished between 1 and 2 h after stimulation. Although one full meal could suffice to accomplish moult in other Triatomine species, Triatoma infestans is able to feed repeatedly during a single larval instar. Accordingly to this, their cuticle recovers stiffness in some hours and becomes able to respond repeatedly to sensory inputs associated with feeding. © 2005 Elsevier Ltd. All rights reserved.

Registro:

Documento: Artículo
Título:Repeated plasticization and recovery of cuticular stiffness in the blood-sucking bug Triatoma infestans in the feeding context
Autor:Melcón, M.L.; Lazzari, C.R.; Manrique, G.
Filiación:Laboratorio de Fisiología de Insectos, DBBE, Ciudad Universitaria, Buenos Aires C1428EHA, Argentina
Lehrstuhl Tierphysiologie, Universität Tübingen, Auf der Morgenstelle 28, 72076 Tübingen, Germany
Institut de Recherche Sur la Biologie de l'Insecte, Université François Rabelais, Parc Grandmont, 37200 Tours, France
Palabras clave:Cuticle; Feeding behavior; Plasticization; Triatoma infestans; blood; body size; cuticle; feeding behavior; physiological response; Triatoma infestans; Triatominae
Año:2005
Volumen:51
Número:9
Página de inicio:989
Página de fin:993
DOI: http://dx.doi.org/10.1016/j.jinsphys.2005.04.013
Título revista:Journal of Insect Physiology
Título revista abreviado:J. Insect Physiol.
ISSN:00221910
CODEN:JIPHA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00221910_v51_n9_p989_Melcon

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Citas:

---------- APA ----------
Melcón, M.L., Lazzari, C.R. & Manrique, G. (2005) . Repeated plasticization and recovery of cuticular stiffness in the blood-sucking bug Triatoma infestans in the feeding context. Journal of Insect Physiology, 51(9), 989-993.
http://dx.doi.org/10.1016/j.jinsphys.2005.04.013
---------- CHICAGO ----------
Melcón, M.L., Lazzari, C.R., Manrique, G. "Repeated plasticization and recovery of cuticular stiffness in the blood-sucking bug Triatoma infestans in the feeding context" . Journal of Insect Physiology 51, no. 9 (2005) : 989-993.
http://dx.doi.org/10.1016/j.jinsphys.2005.04.013
---------- MLA ----------
Melcón, M.L., Lazzari, C.R., Manrique, G. "Repeated plasticization and recovery of cuticular stiffness in the blood-sucking bug Triatoma infestans in the feeding context" . Journal of Insect Physiology, vol. 51, no. 9, 2005, pp. 989-993.
http://dx.doi.org/10.1016/j.jinsphys.2005.04.013
---------- VANCOUVER ----------
Melcón, M.L., Lazzari, C.R., Manrique, G. Repeated plasticization and recovery of cuticular stiffness in the blood-sucking bug Triatoma infestans in the feeding context. J. Insect Physiol. 2005;51(9):989-993.
http://dx.doi.org/10.1016/j.jinsphys.2005.04.013