Effect of 2,4-D and isoproturon on chromosomal disturbances during mitotic division in root tip cells of Triticum aestivum L.
The widespread use of the herbicides for weed control and crop productivity in modern agriculture exert a threat on economically important crops by way of cytological damage to the cells of the crop plant or side effects, if any, induced by the herbicides. In the present communication, author describes the effects of 2,4-D and Isoproturon on chromosomal morphology in mitotic cells of Triticum aestivum L. The wheat seedlings were treated with range of concentrations (50-1200 ppm) of 2,4-D and Isoproturon for 72 h at room temperature. In the mitotic cells, twelve distinct chromosome structure abnormalities were observed over control. The observed irregularities were stickiness, c-mitosis, multipolar chromosomes with or without spindles, fragments and bridges, lagging chromosomes, unequal distribution of chromosomes, over contracted chromosomes, unoriented chromosomes, star shaped arrangement of the chromosomes, increased cell size and failure of cell plate formation. The abnormalities like stickiness, fragments, bridges, lagging or dysjunction, unequal distribution and over contracted chromosomes meet frequently.
Kumar
Sanjay
S
Department of Botany, Nagaland University, Lumami, Nagaland 798601, India. ksanjay79@gmail.com
D015084:2,4-Dichlorophenoxyacetic Acid / Q000633:toxicity*; D002869:Chromosome Aberrations / Q000139:chemically induced*; D032461:Chromosomes, Plant / Q000187:drug effects / Q000235:genetics / Q000648:ultrastructure; D006540:Herbicides / Q000633:toxicity*; D018519:Meristem / Q000187:drug effects / Q000235:genetics; D008938:Mitosis / Q000187:drug effects* / Q000235:genetics; D010671:Phenylurea Compounds / Q000633:toxicity*; D014908:Triticum / Q000187:drug effects* / Q000235:genetics
D006540:Herbicides; D010671:Phenylurea Compounds; D015084:2,4-Dichlorophenoxyacetic Acid; C028904:isoproturon