Phycomyces : Discovery of the Aiming Error in the Avoidance Response

Abstract

It has been determined experimentally that, when a stage IVb Phycomycea sporangiophore is subjected to an asymmetric avoidance stimulus (a single barrier), it uses its own net rotation to convert the spatial stimulus to a temporal one. This finding explains the sporangiophore's nonadaptation to a single-barrier stimulus and adaptation to a double-barrier stimulus.