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Seasonal Variation in Absorption and Translocation of 2,4,5-Trichlorophenoxyacetic Acid and Respiration Rates in Blackjack Oak

  • Arlo V. Dalrymple and Eddie Basler (a1)

Abstract

Measurements of C14-labeled 2,4,5-trichlorophenoxyacetic acid absorbed and translocated from treated leaves of blackjack oak (Quercus marilandica Muenchh.) showed that absorption and translocation were highest in early spring and decreased during May and June, so that there was a minimum at about the first of July. Absorption and translocation increased during July, August, and September. Measurements of soil moisture did not reveal a correlation of water stress and translocation rates. Extensive variations in the respiration rates of the leaf tissue occurred during the growing season. The trends in respiration rates generally paralled the trends in translocation rates.

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Seasonal Variation in Absorption and Translocation of 2,4,5-Trichlorophenoxyacetic Acid and Respiration Rates in Blackjack Oak

  • Arlo V. Dalrymple and Eddie Basler (a1)

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