2014 Volume 1 Issue 1

Histological and histochemical observations on the saccus vasculosus of freshwater featherback, Notopterus notopterus (Pallas, 1769)


S. K. Ghosh, P. Chakrabarti
Abstract

The cytoarchitecture and histochemical characteristics of saccus vasculosus in Notopterus notopterus (Pallas, 1769) were investigated by employing histological and various histochemical techniques. Saccus vasculosus, the richly vascularized reddish, sac like organ bulging from the ventral wall of the diencephalon. Histologically, it contained several loculi lined with considerable number of specialized coronet cells and few supporting cells. The loculi were packed by blood sinusoids. The intense reaction of silver stain was marked in the free end of coronet cells and nerve terminals attached with blood vessels. The localization and chemical nature of acid and neutral mucins in the saccus epithelium was studied by employing PAS-AB technique. Different shades of glycogen were discernible in the apical globules of coronet cells and blood vessels. Intensity of protein and lipid reactions was found to be associated with the coronet cells and blood vessels also. The various intensities of the histochemical reaction in the coronet cells of saccus vasculosus in N. notopterus was correlated with their functional significance.

Keywords: saccus vasculosus, Notopterus notopterus, function, cellular architecture, histochemistry


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Entomology and Applied Science Letters is an international peer reviewed publication which publishes scientific research & review articles related to insects that contain information of interest to a wider audience, e.g. papers bearing on the theoretical, genetic, agricultural, medical and biodiversity issues. Emphasis is also placed on the selection of comprehensive, revisionary or integrated systematics studies of broader biological or zoogeographical relevance. Papers on non-insect groups are no longer accepted. In addition to full-length research articles and reviews, the journal publishes interpretive articles in a Forum section, Short Communications, and Letters to the Editor. The journal publishes reports on all phases of medical entomology and medical acarology, including the systematics and biology of insects, acarines, and other arthropods of public health and veterinary significance.
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