The roles of calcium in cell signaling consequent to chromatophoros in melanophores action and as an activator of mechanochemical transport proteins responsible for pigment granule translocation were investigated in the freshwater fish Puntius species In the present study, the pigment aggregating action induced by K+ was completely inhibited in Ca2+. The scales were first treated with CFR (calcium free ringer solution), the completely disperses state were found. When CFK (calcium free K+ ringer) was added, fully aggregation stages were found. These aggregation dispersion stages were going on at about 2 hrs then after the process were stopped. Varapamil blocked the role of Ca2+which produce their effect by binding to the α1-subunit of the L-type Ca2+channels and reducing Ca2+ flux through the channel. These data reveal an extracellular and an intracellular Ca2+, and demonstrate that the centripetal or centrifugal direction of pigment movement, the translocation velocity, and the degree of pigment aggregation or dispersion attained are calcium-dependent properties of the granule translocation apparatus. The increase in Ca2+may induce membrane depolarization of presynaptic nervous elements around the melanophores, which open the voltage-dependent Ca2+channels. The liberation of adrenergic neurotransmitter follows, which induces the aggregation of pigment in melanophores
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2022: 6.012
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