Acta Biologica Hungarica

, Volume 59, Supplement 2, pp 33–37 | Cite as

Possible Involvement of Nitric Oxide in Coordination of Buccal Rhythm and Gut Motility in Lymnaea stagnalis

Short Communication
  • Taya L. DyakonovaEmail author
  • Varvara E. Dyakonova


NO-generating drugs (SNP, SNAP, NaNO2) activated the standard buccal rhythm and simultaneously slowed down the endogenous rhythm of the NO-synthesizing neuron B2 which enhances gut motility. In the B2, these drugs caused giant hyperpolarizing waves strongly associated with the buccal cycles. Hyperpolarizing waves on the B2 could also be induced by prolonged stimulation of the B2. The inhibitor of NO-synthase L-NNA or the NO scavanger PTIO abolished giant hyperpolarizing waves, depolarised the B2 and activated fast bursting in the B2. The results suggest that NO may be involved in coordination of radula and foregut movements.


Buccal CPG NO-synthesizing neuron mollusk 


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© Akadémiai Kiadó, Budapest 2008

This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (, which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

Authors and Affiliations

  1. 1.Institute for Developmental BiologyRussian Academy of SciencesMoscowRussia

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