Translocation and Persistence of Cycloheximide and Phytoactin in Eastern White Pine
The antibiotics, cycloheximide and Phytoactin, moved systemically in Pinus strobus L. They were absorbed by seedling roots from aqueous dips; by foliage, when sprayed with water solutions; and by trunks, when basally sprayed with fuel oil. After basal stem applications, the antibiotics were translocated both upward and downward in the phloem and xylem. In the tissues of forest pines, cycloheximide persisted longer and in larger quantities than Phytoactin. Spring treatment resulted in more absorption and translocation than fall treatment. Detectable amounts of the antibiotics disappeared rapidly from the pine tissues during the first 2 months after application, then more slowly for the next 2 years. Cycloheximide was still detected in the treated outer and inner bark 3 years after treatment.
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Document Type: Journal Article
Affiliations: Research Technician, The Institute of Forest Genetics, North Central Forest Expt. Sta., Forest Service, U.S. Dept. of Agriculture, Rhinelander, Wisconsin
Publication date: 01 March 1967