A non-heterocystous mutant of Aphanizomenon flos-aquae, selected by competition in light-limited continuous culture
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چکیده
منابع مشابه
A novel biosurfactant, 2-acyloxyethylphosphonate, isolated from waterblooms of Aphanizomenon flos-aquae.
A novel biosurfactant, 2-acyloxyethylphosphonate, was isolated from waterblooms of Aphanizomenon flos-aquae. Its structure was elucidated by chemical degradation and HRFABMS, GC/EI-MS and 1D- and 2D-NMR spectral analyses. The surfactant contained one mole of 2-hydroxyethylphosphonate and one mole of fatty acid, with hexadecanoic acid accounting for 84.1% of the total fatty acid content. The str...
متن کاملCharacterization of a lytic cyanophage that infects the bloom-forming cyanobacterium Aphanizomenon flos-aquae.
Vb-AphaS-CL131 is a novel cyanosiphovirus that infects harmful Aphanizomenon flos-aquae. This cyanophage has an isometric head, 97 nm in diameter and a long, flexible non-contractile tail, 361 nm long. With a genome size of ~120 kb, it is the second largest cyanosiphovirus isolated to date. The latent period was estimated to be ~36 h and a single infected cell produces, on average, 218 infectio...
متن کاملDiversity of Aphanizomenon flos-aquae (cyanobacterium) populations along a Baltic Sea salinity gradient.
Colony-forming cyanobacteria of the genus Aphanizomenon form massive blooms in the brackish water of the Baltic Sea during the warmest summer months. There have been recent suggestions claiming that the Baltic Sea Aphanizomenon species may be different from Aphanizomenon flos-aquae found in lakes. In this study, we examined variability in the morphology and 16S-23S rRNA internal transcribed spa...
متن کاملAntioxidant properties of a novel phycocyanin extract from the blue-green alga Aphanizomenon flos-aquae.
Aphanizomenon flos-aquae (AFA) is a fresh water unicellular blue-green alga (cyanophyta) rich in phycocyanin (PC), a photosynthetic pigment with antioxidant and anti-inflammatory properties. The purpose of this study was to evaluate the ability of a novel natural extract from AFA enriched with PC to protect normal human erythrocytes and plasma samples against oxidative damage in vitro. In red b...
متن کاملThe Effect of Blue-Green Algae Aphanizomenon Flos-Aquae on Nutrient Assimilation in Rats
Blue-green algae Aphanizomenon flos-aquae (AFA), rich in protein, vitamins, and polyunsaturated fatty acids, are used as food supplements. We studied the effect of varying concentrations (0.05-0.4%) of AFA on growth, feed consumption, and nutrient digestion in rats. A diet supplemented with 0.05% algae (equivalent to human daily consumption) had a stimulatory effect on weight gain and feed cons...
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ژورنال
عنوان ژورنال: FEMS Microbiology Letters
سال: 1981
ISSN: 0378-1097,1574-6968
DOI: 10.1111/j.1574-6968.1981.tb06196.x