Publications

the occurrence and biosynthesis of gamma-linolenic acid in a blue-green alga,spirulina platensis.	the acyl-lipid and fatty acid composition of six blue-green algae, namely,spirulina platensis, myxosarcina chroococcoides, chlorogloea fritschii, anabaena cylindrica, anabaena flos-aquae, and mastigocladus laminosus is reported.all contain major proportions of mono-and digalactosyl diglyceride, sulfoquinovosyl diglyceride, and phosphatidyl glycerol, but none possess lecithin, phophatidyl ethanolamine, or phosphatidyl inositol. trans-3-hexadecenoic acid was absent from all extracts.the analyses p ...	1968	17805841
methods involving light variation for isolation of cyanobacteria: characterization of isolates from central australia.	we report the isolation of organisms belonging to a range of cyanobacterial genera from the remote arid region of central australia, together with a preliminary characterization of their temporal modes of nitrogen fixation. we rendered unialgal dermocarpa and myxosarcina spp. (section ii organisms), lpp group b: type x (section iii), and scytonema and nostoc spp. (section iv). we developed an isolation procedure based on a combination of published methods and applicable to a broad spectrum of cy ...	1992	16348803
phylogeny of cyanobacterial nifh genes: evolutionary implications and potential applications to natural assemblages.	dna sequences of a fragment of nifh from diverse cyanobacteria were amplified, cloned and sequenced to determine the evolutionary relationship of nitrogenase within the cyanobacteria as a group, and to provide a basis for the identification of uncultivated strains of cyanobacteria in the environment. analysis of 30 nitrogenase dna and deduced amino acid sequences from cyanobacteria representing five major taxonomic subdivisions showed great variation in phylogenetic distances between the sequenc ...	1997	9141707
cellular fatty acid composition of cyanobacteria assigned to subsection ii, order pleurocapsales.	the cellular fatty acid composition of five of the six genera of unicellular cyanobacteria in subsection ii, pleurocapsales (dermocarpa, xenococcus, dermocarpella, myxosarcina and the pleurocapsa assemblage) contained high proportions of saturated straight-chain fatty acids (26-41% of the total) and unsaturated straight chains (40-67%). isomers of 16:1 were the main monounsaturated acid component (11-59%). polyunsaturated acids were present at trace levels (0-1% or less) in xenococcus and myxosa ...	2000	10843042
chroococcidiopsis and heterocyst-differentiating cyanobacteria are each other's closest living relatives.	many filamentous cyanobacteria reduce atmospheric nitrogen in specialized differentiated cells called heterocysts. here we present evidence that shows that members of the unicellular non-heterocyst-differentiating genus chroococcidiopsis and the filamentous heterocyst-differentiating cyanobacteria are each other's closest living relatives. distance, maximum-parsimony, and maximum-likelihood analyses of complete small subunit ribosomal rna gene sequences yielded highly congruent support for the m ...	2002	12182405
allophycocyanin complexes from the phycobilisome of a thermophilic blue-green alga myxosarcina concinna printz.	the core polypeptide components of the intact phycobilisomes (pbss) prepared by the sucrose gradients in 0.9 m phosphate buffer from a thermophilic cyanobacterium myxosarcina concinna printz were investigated. three allophycocyanins, designated ap1, ap2, and ap3, of the pbs cores were successfully prepared by using the gradient polyacrylamide gel electrophoresis (page) performed in neutral, instead of alkaline, buffer system. the spectral properties of ap2 and ap3 demonstrated that they both had ...	2003	14644565
determination of nitrogen-fixing phylotypes in lyngbya sp. and microcoleus chthonoplastes cyanobacterial mats from guerrero negro, baja california, mexico.	in many environments, biological nitrogen fixation can alleviate nitrogen limitation. the high rates of n(2) fixation often observed in cyanobacterial mats suggest that n(2) fixation may be an important source of n. in this study, organisms expressing nifh were identified in a lyngbya sp.- and two microcoleus chthonoplastes-dominated cyanobacterial mats. the pattern of nitrogenase activity was determined for the lyngbya sp. mat and a microcoleus chthonoplastes mat sampled directly in guerrero ne ...	2004	15066804
some cyanobacteria synthesize semi-amylopectin type alpha-polyglucans instead of glycogen.	it is widely accepted that green plants evolved the capacity to synthesize the highly organized branched alpha-polyglucan amylopectin with tandem-cluster structure, whereas animals and bacteria continued to produce random branched glycogen. although most previous studies documented that cyanobacteria accumulate glycogen, the present study shows explicitly that some cyanobacteria such as cyanobacterium sp. mbic10216, myxosarcina burmensis and synechococcus sp. bg043511 had distinct alpha-polygluc ...	2005	15695453
survival and reproduction in some algae under stress conditions.	pithophora oedogonia and cladophora glomerata survived lowest 60 and 58%, respectively, in june when the pond diurnal water temperature (pdwt) increased to a maximum of 28 degrees c. the lowering of pdwt only by 1 degrees c in july improved survivability of both algae to their almost maximum level of 100 and 96%, respectively. further lowering of pdwt to 17-22 degrees c in november initiated akinete formation in p. oedogonia. the process of akinete initiation, maturation and germination continue ...	2007	18450223
vegetative survival of some wall and soil blue-green algae under stress conditions.	lyngbya major (a wall alga), survived throughout year, maximally to >80 % at atmospheric temperature (at) of 17-36 degrees c and relative humidity (rh) 60-100 % in rainy and spring seasons, but the survival was 43-64 % in winter when at decreased to 5 degrees c and rh was 65-98 %, and 15-23 % in summer when at reached 48 degrees c and rh was 23-60 %. all soil algae (lyngbya birgei, aphanothece pallida, gloeocapsa atrata, oscillatoria subbrevis, o. animalis) survived >90 % in rainy season when so ...	2008	18759119
epibiosis of oxygenic phototrophs containing chlorophylls a, b, c, and d on the colonial ascidian cystodytes dellechiajei.	the external surfaces of marine animals are colonized by a wide variety of epibionts. here, we study the phototrophic epibiotic community attached to the colonial ascidian cystodytes dellechiajei collected in the mediterranean sea. epifluorescence microscopy analysis showed abundant filamentous cyanobacteria on the upper and basal parts of the ascidian that displayed autofluorescence, as well as some unicellular cyanobacteria, diatoms, and structures, which could belong to microscopic rhodophyte ...	2011	20532497