Abstract
Freshly cut sections of frozen potato tuber and apple fruit tissue exhibit a brilliant fluorescence when examined in a dark room under an ultra-violet (Stroblite) lamp. The fluorescence disappears from the apple tissue upon thawing but is retained in potato tuber tissue. Thus the ultra-violet lamp serves as a useful diagnostic means of detecting frost or low temperature injury in potato tubers. Many other plant tissues were frozen and examined, but proved to be non-fluorescent. Acetone extracts of both normal and frozen potato tuber tissue were fluorescent, but similar extracts of both frozen and normal apple fruit were not. Although normal potato tissue is non-fluorescent and frozen tissue is brightly fluorescent, no differences were found in the brightness of the acetone extracts.
Published Version
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