Enhancement of cold hardiness by acclimation is stage-specific in the non-diapausing pupae of onion maggot Delia antiqua (Diptera: Anthomyiidae)
| Autor: | Takumi Kayukawa, Yukio Ishikawa, Michikazu Nomura, Shoichiro Miyazaki, Bin Chen |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2006 |
| Předmět: |
head evagination
delia antiqua cold hardiness cold acclimation supercooling point pupariation Biology biology.organism_classification diptera Acclimatization anthomyiidae Pupa Horticulture Evagination QL1-991 Insect Science Botany Anthomyiidae Cold acclimation phanerocephalic pupa Delia antiqua Hardiness (plants) Zoology trehalose Pupariation |
| Zdroj: | European Journal of Entomology, Vol 103, Iss 3, Pp 691-694 (2006) |
| ISSN: | 1802-8829 1210-5759 |
| Popis: | When puparia of the onion maggot Delia antiqua were preexposed to 5°C for 5 days starting at different time points after pupariation, a large increase in survival after exposure to -20°C for 5 days was observed only when pre-exposure was initiated at 3-6 days after pupariation. The increase in cold hardiness was not associated with a large increase in the trehalose content of the puparia. The supercooling point of the puparia naturally decreased from -18 to -27°C in the first three days after pupariation, and pre-exposure to 5°C did not have an additional effect. Thus, factors responsible for the enhancement of cold hardiness by acclima- tion other than trehalose and supercooling point should be sought. The period of responsiveness to cold acclimation coincided with the time soon after head evagination, which corresponds to "pupation" in lepidopteran insects. The puparia appear to be physiologi- cally flexible for a short time after head evagination, and able to adapt their physiology to the contemporary cold environment. |
| Databáze: | OpenAIRE |
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