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Photoperiodic regulation of hemolymph protein in the woodroach Parcoblatta pennsylvanica

Authors :
Terry L. Page
Gary T. Wassmer
William Cain
Source :
Journal of Insect Physiology. 42:851-858
Publication Year :
1996
Publisher :
Elsevier BV, 1996.

Abstract

In the woodroach, Parcoblatta pennsylvanica , growth rate during postembryonic development has been shown to be photoperiodically controlled. We report here that the protein constituents of the hemolymph are also under photoperiodic control. Electrophoretic patterns under SDS-PAGE conditions and total protein concentrations of hemolymph were measured. Both total protein and the presence of a specific protein band in SDS-PAGE gels (at 82 kD), which we believe to be storage protein, and have termed Development Associated Storage Protein (DASP), showed an annual cycle in animals sampled immediately after collection from the field. Protein concentration in the hemolymph and the amount of DASP were found to be under photoperiodic control in the laboratory. Animals were maintained at constant temperature (25 °C) in light-dark cycles of either 18h light and 6h of darkness (long-day) or 12h of light and 12h of darkness (short-day). Animals maintained in long-days exhibited lower hemolymph protein concentrations than animals in short-days. In contrast, DASP was prominent in long-day animals but was markedly reduced or absent in short-day animals.

Details

ISSN :
00221910
Volume :
42
Database :
OpenAIRE
Journal :
Journal of Insect Physiology
Accession number :
edsair.doi...........e28095a3afb45ecc850b5e2f58abd6a0
Full Text :
https://doi.org/10.1016/0022-1910(96)00041-8