On the nature of pre-freeze mortality in insects: water balance, ion homeostasis and energy charge in the adults ofPyrrhocoris apterus
| Autor: | J. Bastl, Vladimír Koštál, J. Vambera |
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| Rok vydání: | 2004 |
| Předmět: |
Time Factors
Physiology Acclimatization Fat Body Adenylate kinase Aquatic Science Diapause Heteroptera Animal science Body Water Botany Hemolymph Animals Energy charge Electrochemical gradient Molecular Biology Ecology Evolution Behavior and Systematics Czech Republic biology Adenine Nucleotides Osmolar Concentration Sodium Pyrrhocoris biology.organism_classification Survival Analysis Cold Temperature Ion homeostasis Spectrophotometry Insect Science Potassium Regression Analysis Animal Science and Zoology Energy Metabolism |
| Zdroj: | Journal of Experimental Biology. 207:1509-1521 |
| ISSN: | 1477-9145 0022-0949 |
| Popis: | SUMMARYThree acclimation groups [i.e. non-diapause (LD), diapause (SD) and diapause, cold-acclimated (SDA)] of the adult bugs Pyrrhocoris apterus differed markedly in their levels of chill tolerance. Survival time at a sub-zero, but non-freezing, temperature of –5°C (Lt50)extended from 7.6 days, through 35.6 days, to >60 days in the LD, SD and SDA insects, respectively. The time necessary for recovery after chill-coma increased linearly with the increasing time of exposure to –5°C, and the steepness of the slope of linear regression decreased in the order LD>SD>SDA. The capacity to prevent/counteract leakage of Na+ down the electrochemical gradient (from haemolymph to tissues) during the exposure to –5°C increased in the order LD |
| Databáze: | OpenAIRE |
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