Growth, survival and reproduction in Chlorella vulgaris and C. variegata with respect to culture age and under different chemical factors
2007
Agrawal, S.C.,University of Allahabad (India). Dept. of Botany | Manisha,University of Allahabad (India). Dept. of Botany
Batch cultures of Chlorella vulgaris and C. variegata reproducing about twice every 5 d within 0-15 d had vegetative cells and autospore mother cells in the ratio of about 19 : 1. Continuous slow or negligible and/or no growth in control cultures older than 15-d or in young cultures supplied with the antibiotics streptomycin, penicillin, amoxycillin (10-1000 ppm) or tetracycline (10, 100 ppm), and pesticides carbofuran, gammaxine, moticop or iralon (1-100 ppm) was due to slow autospore mother cells dehiscence (leading to an increase in their percentage); while negligible and/or no growth of both algal species in sewage water (100, 25%), detergent (0.1-1%), petrol or kerosene (5-20 %), benzene, toluene or phenol (5, 10%), and pesticides rogor or endosulfan (1, 10 ppm) was due to vegetative cells failure to differentiate into autospore mother cells (leading to decreased/zero autospore mother cells percentage) and/or rapid death of all cells. C. variegata was equally or slightly more sensitive to different chemical stress than C. vulgaris.
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