GROWTH OF CYCLOTELLA-MENEGHINIANA KUTZ .1. EFFECTS OF TEMPERATURE, LIGHT AND LOW-RATE OF NUTRIENT SUPPLY

Authors
SHAFIK HM HERODEK S VOROS L PRESING M KISS KT
Citation
Hm. Shafik et al., GROWTH OF CYCLOTELLA-MENEGHINIANA KUTZ .1. EFFECTS OF TEMPERATURE, LIGHT AND LOW-RATE OF NUTRIENT SUPPLY, Annales de Limnologie, 33(3), 1997, pp. 139-147
Citations number
29
Categorie Soggetti
Limnology
Journal title
Annales de Limnologie → ACNP
ISSN journal
00034088
Volume
33
Issue
3
Year of publication
1997
Pages
139 - 147
Database
ISI
SICI code
0003-4088(1997)33:3<139:GOCK.E>2.0.ZU;2-F
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 degrees C. The estimated saturated irradiance was near 125 mu E m(-2) s(-1). The calculated I-k for growth and photosynthesis were 30 +/- 3 and 44 +/- 6 mu E m(-2) s(-1) respectively. A continuous culture technique was us ed to test the growth and cell composition at the transition state bet ween batch, nutrient sufficiency, and a low rate of nutrient supply. A lgal response was characterized by high intracellular N and C with neg ative 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 nu trition.