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- Title
Absorption, translocation and metabolism of pyridate in a tolerant crop (Zea mays) and two susceptible weeds (Pofygonum lapathifolium L. and Chenopodium album L.).
- Authors
Gaillardon, P.; Guichaoua, J. C.; Gasquez, J.; Scalla, R.
- Abstract
Absorption, translocation and metabolism of 14C-pyridate were compared in tolerant maize, moderately susceptible <em>Polygonum lapathifolium</em> and susceptible <em>Chenopodium album</em>. Foliar absorption was limited in all species, but comparatively higher penetration levels were observed in younger leaves of dicotyledonous species. The absorbed radioactivity was not very mobile and translocation appeared mainly symplastic, Herbicide selectivity could not be explained on the basis of absorption and transport. <em>Chenopodium</em> and <em>P. lapathifolium</em> degraded pyridate and formed unstable water-soluble conjugates that easily released a phytotoxic metabolite. By contrast, more stable unidentified water-soluble metabolites were found in maize. That metabolic difference could explain the selectivity of pyridate.
- Subjects
CORN metabolism; SOIL absorption &; adsorption; POLYGONUM; CHENOPODIUM album; PHYTOTOXINS; METABOLITES
- Publication
Weed Research, 1989, Vol 29, Issue 1, p45
- ISSN
0043-1737
- Publication type
Article
- DOI
10.1111/j.1365-3180.1989.tb00840.x