Toxic effects of monocrotophos on Paramecium caudatum
نویسندگان
چکیده
منابع مشابه
Cytotoxicity assessment of monocrotophos in Paramecium caudatum and Oxytricha fallax.
Experiments were conducted to evaluate the toxic effects ofmonocrotophos in ciliate models Paramecium caudatum and Oxytricha fallax. In acute toxicity studies higherconcentrations of monocrotophos caused marked increase in mobility of cells exhibiting rocking movements within two mins of exposure but were decreased after 30 mins. LC50 value by mortality curve for 3 hr acute toxicity test of Oxy...
متن کاملAcute Toxicity and Cytogenetic Effects of Monocrotophos in Paramecium Caudatum and Oxytricha Fallax
In the present study experiments were conducted to evaluate the toxic effects of monocrotophos on ciliate models Paramecium caudatum and Oxytricha fallax, which can be considered as ideal organisms for investigating water quality fluctuations and risk assessment of pesticides. Cell viability, cell morphology, cell behaviour and macronucleus tests were performed using to different concentrations...
متن کاملBehavioral Mutants in PARAMECIUM CAUDATUM.
Mutants of Paramecium caudatum with abnormal swimming behavior or responses to cations were obtained by mutagenesis with N-methyl-N'-nitro-N-nitrosoguanidine. Some of the mutants, like pawn in P. tetraurelia, cannot swim backward and are called CNR. Seven independently obtained CNR mutants belonged to three complementation groups, designated as cnrA, cnrB and cnrC. Some characteristics of doubl...
متن کاملBinding of Ca Ions by Paramecium caudatum
Binding of (45)Ca by live Paramecium caudatum was determined under various external ionic conditions. It was found that calcium uptake was separable into at least two components, a rapid and a slow one. The rapid component was influenced by the presence of certain other ions in a manner which agrees with the law of mass action. It appears that an ion exchange system may be involved in a binding...
متن کاملThe structure of trichocysts in Paramecium caudatum.
The structure of undischarged and discharged trichocysts has been examined in Paramecium caudatum, and their light-microscopic appearance compared with their fine-structural organization. In living specimens undischarged trichocysts appear to be of a single type with a unimodal variation in length about a mean of 37 fim. When fixed for electron microscopy or compressed beneath a coverslip many ...
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ژورنال
عنوان ژورنال: African Journal of Biotechnology
سال: 2007
ISSN: 1684-5315
DOI: 10.5897/ajb2007.000-2352