Artículo
Cardiac performance in heat-stressed flies of heat-susceptible and heat-resistant Drosophila melanogaster
Fecha de publicación:
06/2021
Editorial:
Pergamon-Elsevier Science Ltd
Revista:
Journal of Insect Physiology
ISSN:
0022-1910
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Thermotolerance is a complex trait that can greatly differ between heat-susceptible (HS) and heat-adapted populations of small insects including Drosophila, with short-term effects after a sub-lethal level of heat stress on many physiological functions. Cardiac performance could accordingly be more robust in heat-resistant (HR) than in HS individuals under heat stress. Here, we tested heart performance under heat-stress effects in two recombinant inbred lines (RIL) of Drosophila melanogaster that dramatically differ in heat knockdown resistance. Heart rate did not strongly differ between heat-susceptible and heat-tolerant flies after a sub-lethal heat stress. Instead, heat-susceptible flies showed a much higher arrhythmia incidence, a longer duration of each heartbeat, and a larger amount of bradycardia than heat-tolerant flies. The highly conserved cardiac proteins SERCA, RyR and NCX that participate in the excitation/contraction coupling, did not differ in activity level between HR and HS flies. Available information for both RIL suggests that heart performance under heat stress may be linked, at least partially, to candidate genes of previously identified quantitative trait loci (QTL) for thermotolerance. This study indicates that HR flies can be genetically more robust in their heart performance than HS flies under even sub-lethal levels of heat stress.
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Articulos(CIC)
Articulos de CENTRO DE INVEST.CARDIOVASCULARES (I)
Articulos de CENTRO DE INVEST.CARDIOVASCULARES (I)
Articulos(IEGEBA)
Articulos de INSTITUTO DE ECOLOGIA, GENETICA Y EVOLUCION DE BS. AS
Articulos de INSTITUTO DE ECOLOGIA, GENETICA Y EVOLUCION DE BS. AS
Citación
Rodríguez, Maia Abigail; Pagola, Lucia Elena; Norry, Fabian Marcelo; Ferrero, Paola Viviana; Cardiac performance in heat-stressed flies of heat-susceptible and heat-resistant Drosophila melanogaster; Pergamon-Elsevier Science Ltd; Journal of Insect Physiology; 133; 6-2021; 1-8
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