The inhibitory effect of calcium on Cylindrospermopsis raciborskii (cyanobacteria) metabolism
Braz. j. microbiol
;
42(4): 1547-1559, Oct.-Dec. 2011. graf, tab
Article
in English
| LILACS
| ID: lil-614621
ABSTRACT
Cylindrospermopsis raciborskii (Woloszynska) Seenaya & Subba Raju is a freshwater cyanobacterium of worldwide distribution. In the North-eastern region of Brazil many eutrophic water reservoirs are characterized by the dominance of C. raciborskii, with recurrent occurrence of blooms. These water bodies have high conductivity due to a high ionic concentration, and are defined as hard (with high values of CaCO3). In this study, we investigated the long-term effect (12 days) of high calcium concentration (8 mM Ca2+) on C. raciborskii (T3 strain) growth, morphology, toxin content, and metabolism. Changes in protein expression profiles were investigated by proteomic analysis using 2D gel electrophoresis and mass spectrometry. A continued exposure to calcium had a pronounced effect on C. raciborskii (T3) it limited growth, decreased thricome length, increased chlorophyll-a content, altered toxin profile (although did not affect PST content, saxitoxin + neosaxitoxin), and inhibited the expression of proteins related to primary metabolism.
Full text:
Available
Index:
LILACS (Americas)
Main subject:
Bacterial Toxins
/
Elevated Tanks
/
Proteome
/
Cylindrospermopsis
/
Electrophoresis, Agar Gel
Language:
English
Journal:
Braz. j. microbiol
Journal subject:
Microbiology
Year:
2011
Type:
Article
/
Project document
Affiliation country:
Brazil
Institution/Affiliation country:
Universidade Federal do Rio de Janeiro/BR
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