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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 growthwere determined in batch cultures. The optimum temperature for growth was 25 °C. The estimated saturated irradiance wasnear 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 continuousculture technique was used to test the growth and cell composition at the transition state between batch, nutrient sufficiency, anda low rate of nutrient supply. Algal response was characterized by high intracellular N and C with negative growth rate. At a lowdilution rate (0.06 d-1), the continuous culture theory was not followed. This critical rate is characterized by low chlorophyll-acontent 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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