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Growth of Cyclotella meneghiniana Kutz. I. Effects of temperature,light and low rate of nutrient supply

Published online by Cambridge University Press:  01 February 2009

H. M. Shafik ,
S. Herodek ,
L. Vörös ,
M. Présing  and
K. T. Kiss
H. M. Shafik
Affiliation:
Balaton Limnological Research Institute of the Hungarian Academy of Science, Tihany, Hungary Suez Canal university, Faculty of Sciences, Botany Department, Ismailia-Egypt
S. Herodek
Affiliation:
Balaton Limnological Research Institute of the Hungarian Academy of Science, Tihany, Hungary
L. Vörös
Affiliation:
Balaton Limnological Research Institute of the Hungarian Academy of Science, Tihany, Hungary
M. Présing
Affiliation:
Balaton Limnological Research Institute of the Hungarian Academy of Science, Tihany, Hungary
K. T. Kiss
Affiliation:
Hungarian Danube Research Station of the Hungarian Academy of Science, God, Hungary
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Abstract

A strain of Cyclotella meneghiniana was isolated from the River Danube. The optimum irradiance and temperature for growth were determined in batch cultures. The optimum temperature for growth was 25 °C. The estimated saturated irradiance was near 125 µE m-2 s-1. The calculated Ik for growth and photosynthesis were 30 ± 3 and 44 ± 6 µE m-2 s-1 respectively. A continuous culture technique was used to test the growth and cell composition at the transition state between batch, nutrient sufficiency, and a low rate of nutrient supply. Algal response was characterized by high intracellular N and C with negative growth rate. At a low dilution rate (0.06 d-1), the continuous culture theory was not followed. This critical rate is characterized by low chlorophyll-a content per cell and may depend on the mode of nutrition.

Keywords

cyclotella meneghinianatemperaturelightlow growth ratecell compositioncyclotella meneghinianatempératurelumièrefaible taux de croissancecomposition cellulaire
Type
Research Article
Information
Annales de Limnologie - International Journal of Limnology , Volume 33 , Issue 3 , September 1997 , pp. 139 - 147
Copyright
© Université Paul Sabatier, 1997

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