Section 5
Chapter 4,896

Cellular changes due to boron toxicity in the blue green alga anacystis nidulans

Martinez, F.; Mateo, P.; Bonilla, I.; Fernandez Valiente, E.

Phyton (Buenos Aires) 46(2): 145-152


ISSN/ISBN: 0079-2047
Accession: 004895513

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The effect of high B concentrations on the blue-green alga Anacystis nidulans has been studied. Neither stimulation nor inhibition of the growth or content of organic constituents was observed when B was added at 10, 25 and 50 mg/l. Higher B concentrations (75 and 100 mg/l) inhibited growth and chlorophyll content. After 72 h of culture there was an almost complete disappearance of the photosynthetic pigments. The higher concentrations of B caused also a decrease in the protein content which was related to a rapid and effective inhibition of nitrate uptake and nitrate reductase activity; furthermore, carbohydrates increased while lipids decreased.

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