Physiological aspects of diapause and cold tolerance during overwintering in Pieris brassicae

  title={Physiological aspects of diapause and cold tolerance during overwintering in Pieris brassicae},
  author={Andrew S. Pullin and Jeffrey S. Bale and Xavier L. R. Fontaine},
  journal={Physiological Entomology},
Abstract The relationship between diapause‐associated metabolic suppression and carbohydrate metabolism linked with cold tolerance was investigated in pupae of Pieris brassicae L. Cold tolerance was assessed by measuring the crystallization temperature (Tc) and by estimates of pre‐freeze mortality. Metabolic suppression was measured using 31P nmr and carbohydrates by GLC. 

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Most probably, lipids play a role as energy reserve, and low-molecular weight carbohydrates and polyols provide cryoprotection for overwintering larvae of the carob moth.

Glycerol and glucose accumulation during diapause in a tropical beetle

Abstract. Carbohydrate changes were measured during the 10‐month adult diapause in the neotropical beetle, Stenotarsus rotundus Arrow (Endomychidae, Coleoptera) to test the hypothesis that metabolic

Overwintering Strategy and Mechanisms of Cold Tolerance in the Codling Moth (Cydia pomonella)

Detailed laboratory analysis of cold tolerance, and whole-winter survival assays in semi-natural conditions, suggest that the average winter cold does not represent a major threat for codling moth populations.

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The values of physiological indices and the enzymes activities involved in the overwintering stage were studied in D. armandi larvae in each month from October 2014 to March 2015. The sorbitol,

Seasonal Change in Cold Tolerance of the House Spider, Achaearanea tepidariorum (Araneae: Theridiidae).

Field-collected nymphs of Achaearanea tepidariorum displayed significant seasonal variation in the level of cold tolerance, and seasonal depression of LLT 50 began to occur one month earlier than that of the SCP, suggesting that these two changes are induced by separate processes.



Biochemical adaptation for cold hardiness in insects

Researchers have elucidated the molecular mechanisms that control the massive conversion of glycogen to polyols and, in some species, regulate the differential synthesis of dual polyols.


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Conversion of Glycogen to Sorbitol and Glycerol in the Diapause Egg of the Bombyx Silkworm

IN the course of biochemical studies1 on the embryonic diapause of the Bombyx silkworm, it has been shown that the glycogen content of the egg decreases markedly at the onset of diapause and reaches

Physiology of cold tolerance in insects.

Future research should be focused on the possible role of other factors in cold hardening such as bound water, dehydration, low-molecular-weight solutes other than polyols, and the biochemical mechanisms forming the basis of the seasonal changes in the cold hardiness of insects.