Homozygous adults show no attraction to sodium chloride in feeding tests, but in repulsion tests they show enhanced sensitivity to this salt. The response to potassium chloride is normal. The electrophysiological response of the L1 neuron of the taste sensilla to Na+ (corresponding to the A acceptor site) is eliminated in homozygous flies, although the response to K+ is normal. GustR1 is epistatic to gustEv86 in the response to sodium chloride.
Taste mutant that affects the fly's responses to attractants and repellents. No attraction to sodium chloride (NaCl) in feeding tests. Response to potassium chloride (KCl) is the same as in wild type.