Regulation of Chloroplast Reactions by Secondary Metabolites Acetylcholine and Biogenic AminesReport as inadecuate




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Acta Botanica Croatica, Vol.49 No.1 December 1990. -

Isolated pea chloroplasts were treated with secondary metabolites acetylcholine, dopamine, adrenaline, noradrenaline, serotonin known as animal neurotransmitters or mediators and found in plant cell as well. There were no effects of all compounds on the NADP-photoreduction. Low concentrations < 10-5 M of these, except serotonin, stimulated noncyclic photophosphorylation in thylakoids. Acetylcholine induced Na+, K+ output from intact chloroplasts, but had no effect on Ca2+, Mg2+ efflux. Dopamine, adrenaline, noradrenaline and serotonin had an opposite effect. A possible regulatory and mediatory role of the substances in chloroplasts and in cell is discussed.



Author: Victoriya V. Roshchina - ; Rusija

Source: http://hrcak.srce.hr/



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