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The inhibitory effect of calcium on Cylindrospermopsis raciborskii (cyanobacteria) metabolism

Leal Carneiro, Ronaldo; Carla Nascimento Alípio, Ana; Mascarello Bisch, Paulo; Maria Feliciano de Oliveira e Azevedo, Sandra; Beatriz Furlanetto Pacheco, Ana.
Braz. J. Microbiol.; 42(4)2011.
Artigo em Inglês | VETINDEX | ID: vti-444817

Resumo

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.
Biblioteca responsável: BR68.1