Words similar to diapause
Example sentences for: diapause
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In embryos that remained at 0-4°C until day 98, there was no obvious difference in development rate during and after diapause, and this is consistent with observations in other insects [ 1 27 ] . There must, however, be some change in condition to move development from being temperature independent to temperature dependent [ 1 ] . This change appears to be at or around katatrepsis.
Once winter has commenced, diapause ends and the insect enters post-diapause quiescence, relying on persistent low temperatures to maintain developmental arrest [ 27 ] . This appears to be the case in A. pisum . The aphid clone used for the experiment would normally oviposit in mid-October, when the average daily temperature is 9°C with a maximum of 15°C [ 32 ] . By day 28 the embryos would be exposed to average daily temperatures of 3°C.
This appears to be somewhat contrary to the traditional understanding of diapause, which typically involves a distinct 'resting stage' [ 1 21 ] . Much research has revealed, however, that even during the 'resting stage' there are physiological changes in the diapausing insect, leading to the concept of 'diapause development' [ 22 23 ] . Nevertheless, such development appears to be primarily physiological rather than morphological, and was defined as physiogenesis by Andrewartha (1952).
Diapause, therefore, represents a discrete developmental process that should be controlled, at least in part, by stereotyped gene expression.
Until recently diapause was generally considered a physiological phenomenon, and much research had concerned the conditions that induce diapause and the endocrinology of its regulation [ 2 3 ] . Nevertheless, diapause is also a developmental process, and these previous studies did not address fundamental questions concerning development before, during and after diapause.
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