Download Olfaction and Taste Volume 5 by Denton, D.A. and Taste, I.S.O. and Coghlan, J.P. and PDF

By Denton, D.A. and Taste, I.S.O. and Coghlan, J.P. and Medicine, H.F.I.E.P.

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7. 8. 9. , Noma, A. and Sato, M. 1972. Physiol. , 9, 325-331. , Sato, M. and Yamashita, S. Proc. Internat. Uni. Physiol. , IX, 425. Frank, M. 1973. J. Gen. , 61, 588-618. Frank, M. 1974. Chem. Sens. , 1, 53-60. , Sato, M. and Yamashita, S. 1968. J. Physiol. 199, 223-240. L. Pfaffmann, C. and Brown, E. 1965. Science, 150, 506-507. A. 1965. J. Comp. Physiol. Psychol. 49,139-144. Weiskrantz, L. 1960. Nature, 187, 879-880. , van der Wei, H. and Zottermann, Y. 1973. Acta Physiol. , 89, 550-557. 26 Genetic Alteration of Insect Sugar Reception Toshihide Kikuchi Department of Biological Science, Tohoku University, Kawauchi, Sendai 980, Japan There has been increasing interest in the properties of sugar receptor sites or receptor substances both in vertebrates and insects.

These workers, however, were most interested in the tongue musculature and the quasi-tubular form adapted for nectar feeding. The relation of hummingbirds to the plants upon which they feed is an interesting case of reciprocal evolution. Grant & Grant (1968) suggest that the ancestors of nectariferous hummingbirds may have first sought insects in flowers. The gradual transition to a predominantly nectar diet then followed. Linnets, orioles and other birds, they report, eagerly feed on sugar water when provided in feeders and sometimes seek nectar.

In Fig. 2 it should be noticed that we considered the peaks appearing 3 sec after a salt stimulus or 8 sec after a sucrose stimulation as the after-responses and not the short peak appearing at the moment the stimulus is replaced by the water rinse. Fig. 2 shows that the after-response to salt was more evident, lasted longer and came sooner after the stimulus response than that after sucrose. No after-response was observed after citric acid or when an intermittent flow of water was used. This seems to parallel an observation in man.

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