Algal production of extra and intra-cellular polysaccharides as an adaptive response to the toxin crude extract of Microcystis aeruginosa

Journal of Environmental Health Science Engineering

Rania El-Shenody²  Hanan Mohamed Khairy¹  Mostafa Mohamed El-Sheekh² 

[1] National Institute of Oceanography and Fisheries, Alexandria, Egypt;Botany Department, Faculty of Science, Tanta University, Tanta, Egypt

关键词: Cyanotoxins;    Intra and extra- cellular polysaccharides;    Crude extracts;    Microcystis aeruginosa;    Allelopathy;   

Others  :  824120
DOI  :  10.1186/1735-2746-9-10

 received in 2012-10-29, accepted in 2012-11-18,  发布年份 2012

【 摘 要 】

This is an investigation concerned with studying the possible adaptive response of four different unicellular algae, Anabaena PCC 7120, Oscillatoria angustissima, Scendesmus obliquus and Chlorella vulgaris, to the toxin of Microcystis aeruginosa (Kützing). The effects of four different concentrations, 25, 50, 100 and 200 μg mL^-1 of microcystins crude extract of M. aeruginosa, on both intra and extra-cellular polysaccharide levels, in log phase, of the four tested algae were studied. The obtained results showed differential increase in the production levels for both intra and extra-cellular polysaccharides by the tested algae, compared with the control. S. obliquus and C. vulgaris showed a resistance to crude toxin higher than Anabaena PCC 7120 and O. angustissima. The highly production of polysaccharides by green algal species under this toxic stress indicated the involvement of these polysaccharides in protecting the algal cells against toxic species and, reflect the biological behavior of particular algal species to the environmental stresses.

【 授权许可】

   
2012 El-Sheekh et al.; licensee BioMed Central Ltd.

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