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Title 

Effects of light intensity and nutrients on the growth of Botryococcus sp.

 

Botryococcus sp.의 생장에 미치는 광도와 영양염류의 영향

Authors 

Hee-Mock OhSeong-Bin KimJun-Hong ParkEung-Roh ParkSung-Taik LeeGi-Seok KwonByung-Dae Yoon

Publisher 

Korean Journal of Applied Microbiology and Biotechnology

Issue Date 

1997

Citation 

Korean Journal of Applied Microbiology & Biotechnology, vol. 25, no. 4, pp. 339-345

Keywords 

Botryococcus sp. Cell growthLight intensityNitrogenPhosphorus

Abstract 

Under the light intensity of 25-72 μE/ m2/s Botryococcus braunii UTEX 572 grew faster than Botryococcus sp. GE 24 isolated from a freshwater lake. The specific growth rate (μ) of B. braunii UTEX 572 was highest at 0.260 (1/day) on a dry weight basis in Chu 13 medium from 1 to 9 days of incubation and then continuously decreased. Carbohydrate concentration and cellular nitrogen and phosphorus contents of B. braunii UTEX 572 gradually decreased with light intensity over a range of 25-72 μE/m2/s, whereas the concentrations of protein and cellular N : P ratio increased with light intensity. Chlorophyll-a concentration showed a decreasing tendency with light intensity. The dry weight of B. braunii UTEX 572 increased in the highest rate of 83 mg/l/day at pH 8.0. When the N : P ratio of Chu 13 medium was adjusted to 50 : 1 by addition of nitrogen source, dry weight increasing rate was 115 mg/l/day between 20 and 28 days of incubation which was the highest value during the cultivation. Cell growth in an open culture of B. braunii UTEX 572 was highest with Chu 13 medium, whereas that with Chu 13 medium adjusted to pH 7.0, containing 250 mg/l penicillin, or containing 1% glucose was reduced on a large scale. However, this result shows the possibility of the mass cultivation of B. braunii UTEX 572 in an open system competing with other microorganisms.

ISSN 

0257-2389

Appears in Collections

1. Journal Articles > Journal Articles

Registered Date

2017-04-19


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