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CYTOMORPHOLOGY AND MORPHOMETRIC CHANGES OF THE NEUROSECRETORY CELLS OF LYMNAEA (RADIX) LUTEOLA IN THE DIFFERENT SEASONAL TEMPERATURE FLUCTUATIONS
Dr. Trijit Nanda* and Sandipan Mondal
ABSTRACT
Exposures to temperature regimes has been considered as one of the most important environmental cues which inturn influence the activity – metabolism, growth, reproduction in several invertebrates. Especially in the gastropod molluscs like Lymnaea (Radix) luteola. Environmental temperature changes depict unique characteristics for ectothermic organisms especially amongst molluscs where the capacity for thermoregulation is far less than in many invertebrates. Indeed changes in the kinetic energy of the environment are characteristically(Rapidly, quantitively) transmitted to the cellular chemistry of the organism. The causo-mechanism of such process in the biological system tells upon the vital processes and the cellular structure on which the life depends. Temperature stresss along with the other hydrological factors are proved to act on the biochemical machinery of several organs including the neurosecretory systems. the sensitivity of the neuro-endocrine centers to thermal stress(hypo and hyperthermia) is striking in invertebrates. Keywords: Lymnaea (Radix) luteola, thermoregulation, neurosecretory systems, neuro endocrine centers, hypo and hyperthermia. [Download Article] [Download Certifiate] |