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Influence of different concentrations of sodium bicarbonate on growth rate and chlorophyll content of Chlorella salina

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Title Influence of different concentrations of sodium bicarbonate on growth rate and chlorophyll content of Chlorella salina
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Creator Valsala,K K
Jayasankar,Reeta
 
Subject Chlorella salina
chlorophyll content
sodium bicarbonate
growth rate
inorganic carbon
 
Description Not Available
Chlorella salina was grown in enriched medium supplemented with different concentrations of sodium bicarbonate to study the influence of inorganic carbon (C) on its growth and chlorophyll content. Linear growth was observed on the treatment with 0.004 and 0.005 M sodium bicarbonate whereas exponential growth was observed in control and 0.001 to 0.003 M bicarbonate treatment. The growth rate was
maximum in 0.005 M concentration with a 1/ln value of 0 .270 + 0.01 on 15 days of culture. Increase in
growth was observed with the increase of concentration of sodium bicarbonate from 0.001 to 0.005 M. Growth rate in 0.005 M concentration was 70% more than that of the control. There was steady decline of photosynthetic pigments (chl a & chl b) in both control and treatment in the initial period of growth. The decline was up to 4th day in the treatments from 0.002 to 0.005 M concentration whereas it was up to 7th day in control and 0.001 M treatment. Chl b was found to be steady from 7th to 15th days of treatment. Maximum chl a was observed in 0.005 M treatment (7.9 μg/ml) on 15th day and minimum during 4th day
of culture (0.6 μg/ml). Chl a to chl b ratio showed increase in all the treatments until 13 days of culture
period. In control and lower concentration of Ci treatment, the ratio increased to more than 2 after 9th day,
whereas similar observation was found on 4th day of culture in 0.004M and 0.005 M treatments. This result
leads to the conclusion that there is a need to augment inorganic carbon along with the enriched medium
during the initial period of culture of Chlorella salina to improve the specific growth rate.
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Date 2021-09-15T09:09:48Z
2021-09-15T09:09:48Z
2008
 
Type Article
 
Identifier Not Available
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http://krishi.icar.gov.in/jspui/handle/123456789/62290
 
Language English
 
Relation Not Available
 
Publisher MBAI