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. 1990 Dec;94(4):1554-60.
doi: 10.1104/pp.94.4.1554.

Boron requirement in cyanobacteria : its possible role in the early evolution of photosynthetic organisms

I Bonilla  1 , M Garcia-González, P Mateo
Affiliations

Boron requirement in cyanobacteria : its possible role in the early evolution of photosynthetic organisms

I Bonilla et al. Plant Physiol. 1990 Dec.

Abstract

The effect of boron on heterocystous and nonheterocystous dinitrogen fixing Cyanobacteria was examined. The absence of boron in culture media inhibited growth and nitrogenase activity in Nodularia sp., Chlorogloeopsis sp., and Nostoc sp. cultures. Examinations of boron-deficient cultures showed changes in heterocyst morphology. However, cultures of nonheterocystous Cyanobacteria, Gloeothece sp. and Plectonema sp., grown in the absence of boron did not show any alteration in growth or nitrogenase activity. These results suggest a requirement of boron only by heterocystous Cyanobacteria. A possible role for this element in the early evolution of photosynthetic organisms is proposed.

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