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Although the molecular regulation of diapause remains largely unknown, there is an accumulation of data suggesting the involvement of heat-shock proteins in the expression of diapause or dormancy. However, Goto et al. [J. Insect Physiol. 44 (1998) 1009] reported that Drosophila triauraria does not express Hsp70 transcripts at normal temperatures, regardless of the diapause state. Here, we investigated...
Diapause-associated gene expression was studied in Drosophila triauraria using subtractive hybridization. Two genes that were shown to be upregulated in diapausing flies by Northern hybridization have similarity to genes encoding antifungal peptides of Drosophila melanogaster, members of the drosomycin family (drosomycin, CG10812, CG10813, CG10815 and CG11520). In addition, a signal peptide and Knot...
Chymomyza costata enters larval diapause at short daylengths. Experiments using non-24-h light-dark cycles revealed that the duration of scotophase plays an essential role in the determination of diapause, and night-interruption experiments suggested that the process measuring night length was divided into two phases, A and B. The A phase lasts about 4 h from the onset of scotophase, and a 1 h light...
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