Letter | Published:

Phosphorylase and glycerol production activated by cold in diapausing silkmoth pupae

Abstract

THE accumulation of glycerol in overwintering insects, first shown in eggs of the silkworm, Bombyx mori1, and pupae of certain saturniid silkmoths2, is now known in many species. Although not all cold-resistant insects contain high levels of glycerol, and the mechanisms of tolerance to cold are not fully understood, it is accepted that naturally produced glycerol can act as an antifreeze and contribute to protection against cold injury3–5.

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