期刊
BIOFOULING
卷 26, 期 5, 页码 499-509出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/08927011003774221
关键词
color measurements; pigments; CIELAB color space; environmental parameters; cyanobacteria
资金
- Spanish Ministry of Science and Education (MEC) [BIA2006-02233/BES-2007-16996]
Previous studies have provided evidence that color measurements enable on site quantification of superficial biofilms, thereby avoiding the need for sampling. In the present study, the efficiency of color measurements to evaluate to what extent pigment production is affected by environmental parameters such as light intensity, combined nitrogen and nutrient availability, was tested with two cyanobacteria, Nostoc sp. strains PCC 9104 and PCC 9025, which form biofilms on stone. Both strains were acclimated, in aerated batch cultures for 2 weeks, to three different culture media: BG-11, BG-110, and BG-110/10 at either high or low light intensity. The content of chlorophyll a, carotenoids, and phycocyanins was measured throughout the experiment, together with variations in the color of the cyanobacteria, which were represented in the CIELAB color space. The results confirmed that the CIELAB color parameters are correlated with pigment content in such a way that variations in the latter are reflected as variations in color.
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