Comparative tests on the uptake and distribution of labeled herbicides by Zebrina pendula and Tradescantia fluminensis
AuthorsA. S. Crafts
Authors AffiliationsMr. Crafts was Professor of Botany and Botanist in the Experiment Station, Davis; Mr. Yamaguchi was Senior Laboratory Technician, Botany Department, Davis.
Hilgardia 27(16):421-454. DOI:10.3733/hilg.v27n16p421. August 1958.
From comparative autoradiographic studies in which labeled herbicides were applied to the leaves of Zebrina pendula and Tradescantia fluminensis, to barley seedlings, and to potato tuber tissue, the following conclusions were drawn:
Aminotriazole, maleic hydrazide, urea, 2,4-D, and 2,4,5-T applied to leaves may move out to other plant parts via the phloem; monuron is limited to xylem transport; compounds that are mobile in the phloem will not move out from chlorotic leaves.
The movement of 2,4-D seems to be restricted by its accumulation into living cells of the leaf, and its movement is apparently limited to phloem.
The movement of aminotriazole and maleic hydrazide is relatively free, and they may move in both phloem and xylem.
The establishment of active sinks for transport by means of growth stimulation may bring about movement into roots or into shoot tips or two-way movement into both roots and shoot tips.
The research reported in this paper was made possible by A.E.C. Contract AT(11-1)-34 Project No. 9.
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