Abstract
The thermal response of Aulacophora nigripennis adults in relation to myo-inositol metabolism changed seasonally. Myo-inositol accumulation was stimulated at 15 and 5°C in October (autumn), but only 5°C was effective for the accumulation in December (early winter). In February (mid winter), myo-inositol degradation was prominent at both temperatures. Myo-inositol metabolism of this beetle thus gradually shifts from synthesis to degradation as the season progresses. This may be related to the progress of diapause development and may contribute to the seasonal profile of the myo-inositol pool in a natural population. Post-diapause adults in March (spring) and June (early summer) regained the ability for myo-inositol accumulation at 5°C. Thus, there are at least two types of myo-inositol accumulation in this beetle; one is under the control of diapause and the other responds directly to environmental conditions independently of diapause.
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