Effects of light path lengths and initial culture density on the cultivation of Chaetoceros muelleri (Lemmermann, 1898)

Göksan, Tolga; Durmaz, Yaşar; Gökpinar, Şevket

doi:10.1016/s0044-8486(01)00854-7

Cited by 31 publications

(11 citation statements)

References 16 publications

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“…From these observations, it was clear that at low cell concentrations, the inhibition percentage was comparatively higher. This may be due to the relationship between toxicity and photoinhibition (Göksan et al 2003), which is more likely to occur at low concentration because the light intensity to which microalgae are actually exposed is not reduced by mutual shading (Evers 1991;Contreras-Flores et al 2003;Richmond 2000). Although experiments were not conducted at higher cell concentrations beyond 0.182 g cell/l, it was supposed that mutual shading might be occurred at the extreme cell density (Grobbelaar and Soeder 1985).…”

Section: Effect Of Cell Concentrationmentioning

confidence: 99%

Microalgal photosynthetic activity measurement system for rapid toxicity assessment

et al. 2008

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A systematic biosensor is constructed for the estimation of toxic compounds based on photosynthetic activity measurement in Selenastrum capricornutum cells. The photosynthetic response was evaluated as a function of light intensity, cell concentration and initial dissolved oxygen. The inhibitory effect of some toxicants (1-butyl-3-methylimidazolium tetrafluoroborate, methanol) on dissolved oxygen production was also determined. In all cases, a toxic response was detected (i.e. a dose-related inhibition of photosynthetic activity was observed). For the present system, a time of only 2 h was needed to predict EC50 values as compared to 96 h for a conventional algal assay based on algal growth rate. Thus, the developed biosensor was proved to be useful as a rapid and simple test method in environmental toxicity assessment.

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Section: Effect Of Cell Concentrationmentioning

confidence: 99%

Microalgal photosynthetic activity measurement system for rapid toxicity assessment

et al. 2008

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“…Each treatment was tested with three replicates. Total cellular proteins, cellular polysaccharides and chlorophyll were quantified by the Bradford method (1976), the modified phenol-vitriol method (Leonardos and Lucas 2000) and Göksan's method (Göksan et al 2003), respectively, on the 15th day after adding IAA at different concentrations to the culture medium of the four microalgae.…”

Section: Marine Microalgae and Cultivation Conditionsmentioning

confidence: 99%

Identification and quantification of indole-3-acetic acid in the kelp Laminaria japonica Areschoug and its effect on growth of marine microalgae

Wang

Miao

2007

J Appl Phycol

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A method was established for the identification and quantification of indole-3-acetic acid (IAA) in extracts of the kelp Laminaria japonica. An IAA content of 90-95 μg kg −1 fresh weight in kelp extract was determined by high performance liquid chromatography (HPLC). IAA identification was based on a combination of co-chromatography and comparative chromatography with a standard, analysis of UV spectra, and atmospheric pressure electrospray mass spectrometry (APESI-MS). IAA was isolated by silica gel chromatography and HPLC. The effect on the growth of four marine microalgae of the pure IAA isolated from kelp extract was investigated. Exogenously added IAA from kelp enhanced the growth of Chlorella sp., Dunaliella salina and Porphyridium cruentum, but not that of Chaetoceros muelleri. IAA from kelp significantly inhibited the accumulation of soluble cellular proteins in Chlorella sp. and P. cruentum, and had a very significant effect on chlorophyll biosynthesis in Chlorella sp. However, there was no obvious effect of IAA on the regulation of biosynthesis of cellular polysaccharides in these four marine microalgae.

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“…These data inferred that www.intechopen.com at low algal cell densities, the inhibitory percentages were rather higher. A possible explanation for this might be the relationship between toxicity and photoinhibition (Göksan et al, 2003), which is more likely to occur at low concentration due to the influence of mutual shading at high algal concentration (Contreras-Flores et al, 2003;Evers, 1991;Richmond, 2000). Though concentrations exceeding 0.182 g cell/L were not evaluated in the present study, it is supposed that mutual shading might be involved in high-density algal culture (Grobbelaar & Soeder, 1985).…”

Section: Effect Of Cell Concentrationmentioning

confidence: 99%

Algal Biosensor-Based Measurement System for Rapid Toxicity Detection

Pham¹,

Cho²,

Yun³

2010

Advances in Measurement Systems

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Effects of light path lengths and initial culture density on the cultivation of Chaetoceros muelleri (Lemmermann, 1898)

Cited by 31 publications

References 16 publications

Microalgal photosynthetic activity measurement system for rapid toxicity assessment

Microalgal photosynthetic activity measurement system for rapid toxicity assessment

Identification and quantification of indole-3-acetic acid in the kelp Laminaria japonica Areschoug and its effect on growth of marine microalgae

Algal Biosensor-Based Measurement System for Rapid Toxicity Detection

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