Please use this identifier to cite or link to this item: http://nopr.niscair.res.in/handle/123456789/23543
Title: Toxicological studies of pesticides on cytoplasmic streaming in Nitella
Authors: Pandey, Sudhir Kumar
Fatma, Tasneem
Keywords: Aquatic pollution;Biomonitoring;Cytoplasmic streaming;Nitella;Pesticides
Issue Date: Jul-2004
Publisher: NISCAIR-CSIR, India
Abstract: In the present study, changes in velocity of cytoplasmic streaming in the giant internodal cells of Nitella for varying concentration of the pesticides, 2,4-D, dieldrin, malathion, methyl parathion and endosulfan, were measured. Marked decrease in the velocity of cytoplasmic streaming was found at the concentrations of 0.01, 0.1, 1, 10 and 100mM. Dieldrin was the most toxic to all the pesticides investigated, followed by methyl parathion, endosulfan, malathion and 2,4-D. Threshold values for dieldrin, methylparathion, endosulfan, malathion and 2,4-D as indicated by the onset of decrease in the normal cytoplasmic streaming velocity were less than 6.25×10-6, 2.5×10-5, 5×10-5, 5×10-5 and 1.25×10-5M respectively. Cessation of streaming was noticed above 1mM in dieldrin and above 10mM when exposed to methylparathion and endosulfan. Cessation of streaming was not seen up to 100mM concentration of 2,4-D and malathion.
Page(s): 732-735
URI: http://hdl.handle.net/123456789/23543
ISSN: 0975-1009 (Online); 0019-5189 (Print)
Appears in Collections:IJEB Vol.42(07) [July 2004]

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