Abstract
Nutritional and physical factors which influence the germination of akinetes of Nodularia spumigena (Cyanobacteriaceae) were examined. Low concentrations of phosphorus (<0.9 μM) were required for germination. Nitrate had no effect, but ammonia, at concentrations of >45 μM, inhibited germination. Salinities of >20‰ were inhibitory to germination. Optimum temperatures were 22°C or greater. Germination did not take place in the dark, but only very low light intensities (0.5 microeinstein m−2 s−1) were necessary to initiate germination. Red light (620 to 665 nm) was required. More than 24 h of continuous exposure to light was necessary for any significant germination to occur. The conditions for germination corresponded with conditions in the Peel-Harvey Estuary, Western Australia, 2 to 3 weeks before large summer Nodularia blooms.
Full text
PDF
Selected References
These references are in PubMed. This may not be the complete list of references from this article.
- Adams D. G., Carr N. G. The developmental biology of heterocyst and akinete formation in cyanobacteria. Crit Rev Microbiol. 1981;9(1):45–100. doi: 10.3109/10408418109104486. [DOI] [PubMed] [Google Scholar]
- HUGHES E. O., GORHAM P. R., ZEHNDER A. Toxicity of a unialgal culture of Microcystis aeruginosa. Can J Microbiol. 1958 Jun;4(3):225–236. doi: 10.1139/m58-024. [DOI] [PubMed] [Google Scholar]
- Huber A. L. Nodularia (cyanobacteriaceae) akinetes in the sediments of the peel-harvey estuary, Western australia: potential inoculum source for nodularia blooms. Appl Environ Microbiol. 1984 Feb;47(2):234–238. doi: 10.1128/aem.47.2.234-238.1984. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Jensen T. E., Clark R. L. Cell wall and coat of the developing akinete of a Cylindrospermum species. J Bacteriol. 1969 Mar;97(3):1494–1495. doi: 10.1128/jb.97.3.1494-1495.1969. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Kaushik M., Kumar H. D. The effect of light on growth and development of two nitrogen fixing blue-green algae. Arch Mikrobiol. 1970 Oct 21;74(1):52–57. doi: 10.1007/BF00408687. [DOI] [PubMed] [Google Scholar]