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Classification and mapping of neurosecretory cells in the optic, supraoesophageal and thoracic ganglia of the female spiny lobster Panulirus homarus (Linnaeus, 1758) and their secretory activity during vitellogenesis

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Title Classification and mapping of neurosecretory cells in the optic,
supraoesophageal and thoracic ganglia of the female spiny lobster Panulirus
homarus (Linnaeus, 1758) and their secretory activity during vitellogenesis
Not Available
 
Creator Radhakrishnan,E V
Fernandez,Rachel
 
Subject neurosecretory cells: Panulirus homarus
 
Description Not Available
The crustacean endocrine system consists of epithelial type of endocrine glands and endocrine structures
of neural origin. The neurosecretory cells are of great significance in the crustacean endocrine system
with respect to the number of neurohormones regulating reproduction. The study describes the general
morphology of the central nervous system as well as the neurosecretory cells in the optic, supraoesophageal
and thoracic ganglia of the spiny lobster, Panulirus homarus. The central nervous system of P. homarus
follows the general arthropod pattern which consists of a ganglionated nerve cord extending from the
cephalic region to the end of the abdomen. The neurosecretory cells are characterized by the presence
of large nucleus, abundant cytoplasm, granules, vacuoles etc. in their perikarya showing differences
in their size and shape. Based on these characteristics, the neurosecretory cells are classified into
different cell types. The optic ganglia have six types of neurosecretory cells, whereas the supraoesophageal
ganglion and the thoracic ganglia have eight neurosecretory cell types. Cyclic changes are observed
in the perikarya of neurosecretory cells in relation to the synthesis of neurosecretory material. The
secretory changes in the different neurosecretory cell types follow a basic pattern with four phases,
viz. synthetic phase, vacuolar phase, secretory phase and quiescent phase. The secretory cycle of
different neurosecretory cell types in the optic ganglia, supraoesophageal ganglia and thoracic ganglia
were correlated with the ovarian developmental stages. The cyclic secretory activity of neurosecretory
cells in the optic, supraoesophageal and thoracic ganglia points to secretion of certain hormones, which
regulate the process of vitellogenesis.
Not Available
 
Date 2021-09-16T04:34:57Z
2021-09-16T04:34:57Z
2010
 
Type Article
 
Identifier Not Available
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/62603
 
Language English
 
Relation Not Available
 
Publisher MBAI