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Uptake, Translocation, and Metabolism of Hexazinone in Blueberry (Vaccinium sp.) and Hollow Goldenrod (Solidago fistulosa)

Published online by Cambridge University Press:  12 June 2017

Jerry J. Baron
Affiliation:
Dep. Hortic. Sci., North Carolina State Univ., Raleigh, NC 27695-7609
Thomas J. Monaco
Affiliation:
Dep. Hortic. Sci., North Carolina State Univ., Raleigh, NC 27695-7609

Abstract

Hexazinone [3-cyclohexyl-6-(dimethylamino)-1-methyl-1,3,5-triazine-2,4(1H,3H)-dione] toxicity, absorption, translocation, metabolism, and effect on photosynthesis were investigated with rooted cuttings of highbush blueberry (Vaccinium corymbosum L.), rabbiteye blueberry (V. ashei Reade), and hollow goldenrod (Solidago fistulosa Miller # SOOFI). Highbush and rabbiteye blueberry plants were three times more tolerant to root applications of hexazinone than hollow goldenrod. Blueberry plants absorbed an average of 7.9% of root-applied 14C-hexazinone and hollow goldenrod absorbed an average of 10.1%. An average of 6.8% of root-absorbed hexazinone (14C-label) was translocated from the roots of blueberry to stem and leaves. Radioactivity in hollow goldenrod was distributed equally between roots and shoots. The majority of radioactivity in both species was recovered as hexazinone. Root-absorbed hexazinone caused a rapid inhibition of photosynthesis in intact hollow goldenrod leaves. Root-absorbed hexazinone was capable of inhibiting photosynthesis in intact blueberry leaves; however, this occurred only when roots were exposed to high concentrations of hexazinone.

Type
Physiology, Chemistry, and Biochemistry
Copyright
Copyright © 1986 by the Weed Science Society of America 

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