ISSN:
1365-3180
Source:
Blackwell Publishing Journal Backfiles 1879-2005
Topics:
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
Notes:
Treatment of both tolerant and susceptible species with dinitroaniline herbicides results in root swelling typical of mitotic disrupters, however, no root swelling was observed in carrots treated with saturated solutions of all the dinitroaniline herbicides tested, with the exception of oryzalin treatments at ≥ 10−5 M. These levels of treatment are 100–1000 times the levels that caused root-tip swelling, even in tolerant plants. This properly classifies carrot as dinitroaniline-resistant rather than merely tolerant. Cross-resistance was noted to the structurally related mitotic disrupter, hexanitrodiphenylamine, and to the structurally unrelated herbicide, amiprophos-methyl. No resistance was noted to a number of other mitotic-disrupting herbicides. Both immunofluorescence and electron microscopy indicate that the microtubules of carrot roots were unaffected by dinitroaniline treatment. All organized microtubule configurations (cortical, pre-prophase bands, spindle, and phragmoplast) were observed in the treated material.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1111/j.1365-3180.1988.tb00789.x
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