Effects of Heavy Metals on the Growth and Survivability of vegetative cells and the Formation of Autospore mother cells in Chlorella variegata and Chlorella vulgaris

Abstract

The present study was aimed to find out that to what extent the growth, and/or survivability and reproduction of Chlorella variegata and Chlorella vulgaris were affected in presence of different heavy metals (zinc, copper , manganese , nickel , cadmium, lead and mercury). Both species of Chlorella were easily available from local habitats, and grew and reproduce well in cultures. Both species were grown in BG 11 medium (Stanier et al., 1971). Their cultures were maintained in controlled culture condition at 22+1^.C temperature and 2 K lux light intensity for 16 hours a day . In order to maintain them in actively growing condition, subculturing was done after every 10-15 days of inoculation

 Keywords- C.var. Chlorella variegata     C.vul. Chlorella vulgaris