Pheromonal activation of vomeronasal neurons in plethodontid salamanders

Brain Res. 2002 Oct 18;952(2):335-44. doi: 10.1016/s0006-8993(02)03369-3.

Abstract

Pheromones from the mental glands of male plethodontid salamanders increase sexual receptivity in conspecific females. The pheromone enters the vomeronasal organ during courtship to produce this effect. Vomeronasal neurons from female Plethodon shermani were examined following exposure to male pheromone or saline placed on the nares. Agmatine was used in conjunction with the pheromone to enable immunocytochemical visualization of chemosensory neurons that were activated by the pheromone. Olfactory neurons exposed to pheromone or saline, and vomeronasal neurons exposed to saline did not demonstrate significant labeling. A population of vomeronasal neurons was intensely labeled following exposure to the pheromone. This study suggests that a specific population of vomeronasal neurons in a female plethodontid salamander is responsible for transmitting pheromonal information to the brain to produce modifications in behavior.

Publication types

  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Animals
  • Female
  • Male
  • Salamandridae
  • Sex Attractants / analysis*
  • Sex Attractants / isolation & purification
  • Sex Attractants / pharmacology
  • Vomeronasal Organ / chemistry*
  • Vomeronasal Organ / drug effects
  • Vomeronasal Organ / physiology

Substances

  • Sex Attractants