High temperature pulses decrease indirect chilling injury and elevate ATP levels in the flesh fly, Sarcophaga crassipalpis |
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Authors: | Vanessa H Dollo Shu-Xia Yi Richard E Lee Jr |
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Institution: | Department of Zoology, Miami University, Oxford, OH 45056, USA |
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Abstract: | Indirect chilling injury commonly occurs during long-term exposure to low temperature in many organisms including insects. A previous study revealed increased rates of survival and reduced cold injury in flesh flies, Sarcophaga crassipalpis, that experienced an intermittent pulse of high temperature during a low-temperature regiment. We extended these studies by determining survival rates and ATP levels for flies that had undergone continuous long-term exposure at 0 °C versus those experiencing a 24-h warming pulse of either 15 or 20 °C. Survival among flies that had undergone a warming pulse was significantly greater than for flies that were maintained continuously at 0 °C. Furthermore, ATP levels of flies that had experienced a warming pulse were significantly higher than those of flies maintained at 0 °C. These data suggest that brief warming pulses during long-term cold storage allow regeneration of energy reserves that promote survival and reduce indirect chilling injury. |
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Keywords: | ATP Energy supply Indirect chilling injury Warming pulse |
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