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1.
An. acad. bras. ciênc ; 89(2): 1251-1258, Apr.-June 2017. tab, graf
Article in English | LILACS | ID: biblio-886681

ABSTRACT

ABSTRACT Tricyclazole is currently one of the fungicides recommended for the treatment of diseases in irrigated rice. However, there is relatively little information on its cytotoxic and genotoxic potential. The objective of this study was to evaluate the cytotoxicity and genotoxicity of rice crop water after apllication of the tricyclazole fungicide through the Allium cepa L. test. The rice crop water samplings were collected before and 1, 15 and 30 days after application of the fungicide in rice plant shoots. The Allium cepa roots were placed in contact with the rice crop water to check for possible chromosomal abnormalities and mitotic index of the bioindicators meristematic cells. The data obtained by the Allium cepa test indicates that the application of the tricyclazole fungicide leads to an increase in the genotoxic activity in the rice crop water, through the appearance of chromosomal abnormalities, without, however, causing significant effects on the mitotic index. The major chromosomal alterations observed were anaphasic and telophasic bridges and laggard chromosomes.


Subject(s)
Oryza/drug effects , Onions/drug effects , Fungicides, Industrial , Oryza/genetics , Water Pollutants, Chemical/toxicity , DNA Damage , Chromosome Aberrations/chemically induced , Crops, Agricultural , Crops, Agricultural/genetics , Agricultural Irrigation , Mitosis/drug effects , Mitotic Index , Mutagenicity Tests/methods
2.
An Acad Bras Cienc ; 89(2): 1251-1258, 2017.
Article in English | MEDLINE | ID: mdl-28489188

ABSTRACT

Tricyclazole is currently one of the fungicides recommended for the treatment of diseases in irrigated rice. However, there is relatively little information on its cytotoxic and genotoxic potential. The objective of this study was to evaluate the cytotoxicity and genotoxicity of rice crop water after apllication of the tricyclazole fungicide through the Allium cepa L. test. The rice crop water samplings were collected before and 1, 15 and 30 days after application of the fungicide in rice plant shoots. The Allium cepa roots were placed in contact with the rice crop water to check for possible chromosomal abnormalities and mitotic index of the bioindicators meristematic cells. The data obtained by the Allium cepa test indicates that the application of the tricyclazole fungicide leads to an increase in the genotoxic activity in the rice crop water, through the appearance of chromosomal abnormalities, without, however, causing significant effects on the mitotic index. The major chromosomal alterations observed were anaphasic and telophasic bridges and laggard chromosomes.


Subject(s)
Chromosome Aberrations/chemically induced , Fungicides, Industrial/toxicity , Onions/drug effects , Onions/genetics , Oryza/drug effects , Thiazoles/toxicity , Water Pollutants, Chemical/toxicity , Agricultural Irrigation , Crops, Agricultural/drug effects , Crops, Agricultural/genetics , DNA Damage , Mitosis/drug effects , Mitotic Index , Mutagenicity Tests/methods , Oryza/genetics
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