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International Journal of Zoological Research
Year: 2012  |  Volume: 8  |  Issue: 1  |  Page No.: 1 - 11

Hemocytes and Enzyme-based Route to Evaluate the Impact of Seed Cocoons Preservation Conditions on Antheraea mylitta Pupae

J.P. Pandey, Dinesh Kumar, Sony K. Roy, P.K. Mishra, A.K. Sinha and B.C. Prasad    

Abstract: Tropical tasar silkworm, Antheraea mylitta Drury DABA-ecorace is commercially exploited in India for tasar silk production. Generally, its cocoons used to preserve in outdoor and indoor conditions. But in recent past, due to global warming, tasar silk zone day time temperature (May-June) shoots up and it goes up to 35 to 45°C or even more. It cause adverse impact on the survival of tasar silkworm pupae and invite heavy loss to the tasar silk industry. In the present study, hemocyte and enzyme-based methods have been used to evaluate the impact of outdoor and indoor seed cocoon preservation on A. mylitta pupae. Interestingly, differences in Total Hemocyte Count (THC), hemocyte contour/morphology, protein concentration, fat body and hemolymph acid phosphatase (Acp) activity of outdoor and indoor preserved pupae have been observed. Marked variation in THC was observed among high, low and median weight pupae. Although, no significant variation was observed in THC of indoor and outdoor preserved female pupae but significant difference was found in male pupae of both the preservation conditions. Differential profile of hemocytes was differing in outdoor and indoor conditions with change in cell-contour. Elevation in immune cell “plasmatocytes (PLs)” numbers was recorded in indoor preserved cocoon. Acp activity in fat body of indoor preserved pupae was higher than outdoor but reverse trend was found in hemolymph. Activity profile Acp vary in male and female with higher, lower and median weight pupae. Protein concentration in hemolymph of outdoor preserved pupae was more in comparison to indoor but this trend was found usually reverse in fat body. In addition, less protein concentration was recorded in fat body and hemolymph of male pupae in contrast to female. It is expected that, based on hemocyte and enzyme-based method impact of cocoon preservation conditions on A. mylitta pupae can be evaluated/observed.

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