Abstract
Scott, Tom K., and Winslow R. Briggs. (Stanford U., Stanford, Calif.) Recovery of native and applied auxin from the dark-grown ‘Alaska’ pea seedling. Amer. Jour. Bot. 50(7): 652–657. Illus. 1963.—The distribution and movement of “free” endogenous and applied auxin were determined in the 7-day-old dark-grown ‘Alaska’ pea epicotyl by means of short-term ether extraction. A general decrease in total endogenous auxin content took place from apex to base within the growing as well as the non-growing regions. Factors other than growth itself may be responsible for this decrease. Auxin distribution changes, as they occur following the removal of the apical bud, may reflect an incompletely polar transport system operating in the epicotyl. This suggestion was supported by following the movement of indole-3-acetic acid applied in lanolin paste. The results presented are related to similar experiments performed on the light-grown ‘Alaska’ pea seedling as well as on other vascular plants.
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