Related Experiment Video
Updated: Feb 10, 2026

Sexual Crosses with the Mucoromycete Phycomyces blakesleeanus
Published on: June 6, 2025
What do we know about the non-uniform perception of a phototropic stimulus in Phycomyces?
1Institut für Biologie II, Schänzlestrasse 1, D-7800, Freiburg, Germany.
Abstract:
For a comprehensive study of phototropism in sporangiophores of the fungus Phycomyces, quantitative treatment of spatial aspects is necessary. The first step in quantifying spatial factors of phototropic signal processing is the elucidation of the non-uniform light profile, predominantly caused by a lens effect in the cylindrical body of the sporangiophore. Herein we compare recently presented theoretical and experimental studies of light profiles. Errors and ambiguities arising from instrumental limitations and arbitrary assumptions are revealed. On the other hand, by combining theoretical and experimental results we have been able to select out the reliable information, which can now be applied in phototropic studies.
Related Concept Videos
Subliminal Perception
Factors Affecting Perception
An illustrative example of a perceptual set is the scenario where an airline pilot told...
Uniform Distribution
Two essential properties of this distribution are
Perception
Bottom-up processing begins at the sensory level, where receptors detect external environmental stimuli. These could include the tactile sensation of...
Gestalt Principles of Perception
Uniform Circular Motion

