1. 1. The effect of different, biologically active agents (serotonin, l-tryptophan, 5 OH-tryptophan, tryptamin, adrenalin, noradrenalin, tyramine, and drugs (LSD, chlorpromazin, iproniazid) was investigated on opening and closing of the glochidia of Anodonta cygnea L. We found that: a. All the employed bioactive agents have a more or less intensive activity-increasing effect. b. When using tryptamin, the increase of activity was long-lasting, keeping on for over 30 min. c. LSD and to a smaller degree chlorpromazin cause an increase of activity. These agents and iproniazid inhibit the effect of tryptamin. 2. 2. It could be suggested that in the early ontogenetic stage of Anodonta, tryptamin, formed during the course of metabolism, plays the role of a local hormone in the regulation of the "spontaneous" rhythmic activity.
ASJC Scopus subject areas
- Environmental Science(all)
- Earth and Planetary Sciences(all)