PENETRATION OF SUGARS FROM THE CHEMOSENSORY HAIR TIP IN THE FLESHFLY

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Abstract
(1) The penetrations of 14C-D-glucose and 3-O-methyl-14C-D-glucose into the isolated head of the fleshfly, Boettcherisca peregrina, from the tip of the longest chemosensory hair on the labrum were investigated. (2) Both 14C-D-glucose and 3-O-methyl-14C-D-glucose penetrated into the hair almost linearly with time and moved rapidly into the labrum. The isotopic activity was finally detected in the head. (3) The isotopic activity of the hair dipped into 14C-D-glucose solution increased in the preparation which had been pretreated with 7.5 × 10−2M colchicine for 30 min, whereas in the case of 3-O-methyl-14C-D-glucose no effect by 7.5 × 10−2M colchicine was found. (4) Both 14C-D-glucose and 3-O-methyl-l4C-D-glucose which penetrated from the pore of the hair tip were detected in the dendritefree lumen and in the dendrite-containing lumen of the chemosensory hair. (5) These results suggest that D-glucose not only moves in the dendrite-free lumen and the dendrite-containing lumen but also in the dendrite(s). The suggestive results that 3-O-methyl-D-glucose moves in the dendrite(s) could not be obtained.

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