Cilioexcitatory and Cilioinhibitory Processes Initiated by Light on two Identifiable Neuronal Pigments in Mytilus Edulis | Zendy

Anthony A. Paparo | Zendy; Judith A. Murphy | Zendy

Open Access

Cilioexcitatory and Cilioinhibitory Processes Initiated by Light on two Identifiable Neuronal Pigments in Mytilus Edulis

Author(s) -

Anthony A. Paparo,

Judith A. Murphy

Publication year - 1978

Publication title -

journal of experimental biology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.367

H-Index - 185

eISSN - 1477-9145

pISSN - 0022-0949

DOI - 10.1242/jeb.76.1.47

Subject(s) - mytilus , biology , hemeprotein , stimulation , chemistry , biophysics , biochemistry , heme , neuroscience , ecology , enzyme

Two neuronal chromoproteins (red-haemoprotein and yellow-carotenoprotein) initiate changes in ciliary activity on the gill of Mytilus. Photic, electrical and chemical stimulation of these chromoproteins correlate with fluctuations in ionic (calcium and iron) deposits in gill bulk tissue samples. Microspectrophotometric measurements of chromoprotein spectral band patterns reveal two or three absorption maxima for carotenoprotein and haemoprotein respectively. Under aerobic conditions, cilioinhibition and cilioexcitation results after activation of carotenoprotein or haemoprotein respectively. Carotenoproteins are only engaged during gradual anoxia. Immediate anoxia renders both chromoproteins inoperative. Changes in ciliary activity initiated by photic stimulation of neuronal chromoproteins are abolished by denervation of the gill. It is postulated that photoactivation and/or release of specific neurotransmitters lead to transformations in chromoproteins with subsequent neuronal regulation of gill ciliary activity.

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