Effects of diuron and fluometuron metabolites on the growth and fiber quality of cotton (Gossypium hirsutum)

Koskinen, William C.

doi:10.1007/bf01700145

Cited by 2 publications

(1 citation statement)

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“…In general, the maximum HI value found for UT448//UT196 and Dp II-I//UT196 diploid strains was obtained at a concentration of 2.5 µg/mL, for both herbicides. Interestingly, this concentration has been commonly reported in soil contaminated with diuron and trifluralin (Moorman and Koskinen, 1990;Garriott et al, 1991). In treatments with higher herbicide concentration there was a decrease in HI values.…”

Section: Discussionmentioning

confidence: 52%

Mitotic crossing-over induced by two commercial herbicides in diploid strains of the fungus Aspergillus nidulans

Cardoso

Pires²,

Zucchi³

et al. 2010

Genet. Mol. Res.

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ABSTRACT. Some herbicides are suspected of promoting teratogenic, carcinogenic and mutagenic events. Detection of induced mitotic crossing-over has proven to be an indirect way of testing the carcinogenic properties of suspicious substances, because mitotic crossing-over is involved in the multistep process of carcinogenesis. We examined mitotic crossing-over induced by two commercial herbicides (diuron and trifluralin) in diploid strains of Aspergillus nidulans based on the homozygotization index. Low doses (2.5 μg/mL) of diuron were sufficient to increase the mean homozygotization index in 2.1 and 11.3 times for UT448// UT196 and Dp II-I//UT196, respectively, whereas the same dose of trifluralin increased this mean only 1.2 (UT448//UT196) and 3.5 (Dp II-I// UT196) times, respectively. The lower homozygotization index value found for trifluralin could be due to its interference with mitotic crossingover in eukaryotic cells. We concluded that the diploid Dp II-I//UT196 of A. nidulans is more sensitive to organic compounds than UT448//UT196; these compounds cause recombinational events at a greater frequency in the latter diploid. This system holds promise as an initial test for carcinogenicity of organic compounds, including herbicides.

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Section: Discussionmentioning

confidence: 52%