• S G Pal

      Articles written in Proceedings – Animal Sciences

    • Electron microscopic study of the spermatheca ofGesonula punctifrons (Acrididae: Orthoptera)

      S G Pal D Ghosh

      More Details Abstract Fulltext PDF

      The present transmission electron microscopic study of the spermatheca of a common Indian grasshopper,Gesonula punctifrons, has highlighted the presence of the glandular secretory cells (SGC) and ductule cell (DC) in the spermathecal epithelium and additionally the occurrence of muscle cells, tracheoles and haemocytes. Both the former cell types are secretory in nature and probably their discharges in the lumen of the cuticle-lined spermathecal duct or ductule vary in their chemical nature. The ultrastructural evidence gives ample support to a concept of a lysosomal control of the secretory materials prior to their liberation in the lumen. The characteristic features of the plasma membranes of the secretory cells clearly suggest their involvement in the transepithelial transport of ions and smaller molecules across the basement membrane. A neuronal supply to the spermathecal wall is yet to be demonstrated to explain the filling in and out of the male gametes by this organ.

    • Haemolymph of femaleOxya hyla hyla serville (Orttioptera: Acrididae): A preliminary study

      D Ghosh B Ghosh R Saha S G Pal

      More Details Abstract Fulltext PDF

      The preliminary light microscopic and biochemical study of the haemolymph ofOxya hyla hyla records the presence of five different types of haemocytes and gives a quantiative estimation of plasma proteins along with their gel electrophoretic band patterns. The higher number of total haemocyte count in adult female compared to that of immature one may be attributed to some kind of synthesis and transport of proteins or other yolk materials during vitellogenesis. High plasma protein concentration during monsoon may be associated with the reproductive maturity of these insects. The gel electrophoretic pattern of plasma proteins reveals the constant presence of two particular bands suggesting the occurrence of lipoprotein and juvenile hormone carrier protein.

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