Vol. 3, Issue 1 (2018)
Effect of herbicides on two species of fresh water cyanobacteria
Author(s): T Mounika, T Asheervadam, T Malathi, B Digamber Rao
Abstract: Two species of cyanobacteria, such as Anabaena variabilis and Hapalosiphon sp. were collected from the various agro-climatic regions of Warangal district of Telangana state. Purified isolated culture were inoculated in 500ml Erlenmeyer flask containing 100 ml BG-11 N+ media. The cultures kept under optimum conditions and routinely sub-cultured. The impact of herbicides such as 2,4-D, Excel Mera were studied two filamentous cyanobacteria with reference to Chlorophyll-a, Carotenoid, Phycocyanin contents. In Anabaena variabilis the Chlorophyll-a revealed that the lower concentration of 2,4-D (6ppm) on 4th day has shown some increase when compare with other concentrations (12,18,24ppm) and the Hapalosiphon species at 5ppm concentration on 8th day expressed with little higher than the other concentrational under study.