Two species of Chara viz., C. zeylanica and C. corallina were treated with CuSO4 and Diurone [3-(3, 4-dichloropheny)1)-1, 1-dimethyl urea] at a concentration range of 0.1 to 0.25% and 10 to 100 ppm respectively. The cytological changes of antheridial filamentous cells of Chara were noted due to the chemical treatment and are analysed.
