Publications

glutamate synthase in blue-green algae.		1975	236957
fructose-diphosphate aldolase from blue-green algae.		1975	237181
[reduction paths of reaction centers of photosystem i of photosynthesis].	the behaviour of esr signal i in blue-green algae and chloroplasts is considered under various illumination and with various previous treatment. it is shown that the main process determining the kinetics of p700 plus reduction is the reaction with reduced components of the electron transfer chain between the two photosystems. if the accumulation of the products is inhibited by any way, then the reduction rate depends on the reactions with reducing agents in the incubation medium accumulated unde ...	1975	167869
evolution of 5srna.	the evolution of 5srna of 17 organisms ranging from human to bacteria has been studied using a sequence homology analysis. the evolutionary rate of 5srna genes has been estimated to be 2.2x10(-10) replacement per one nucleotide site per year. this value is about the same as that of cytochrome c or trna's (congruent to 2x10(-10)). a phylogenic tree of these organisms including both eukaryotes and prokaryotes has been constructed from the evolutionary distances (the rate of nucleotide substitution ...	1975	765486
control of gene expression in blue-green algae.		1975	803643
nitrogen fixation and the heterocyst in blue-green algae.		1975	805725
nucleic acid synthesis and regulation in blue-green algae.		1975	805726
phylogenetic origin of the chloroplast and prokaryotic nature of its ribosomal rna.	the 16s ribosomal rna of the euglena gracilis chloroplast has been characterized in terms of its two-dimensional electrophoretic "fingerprint" (t1 ribonuclease). results show it to be a typically prokaryotic 16 s rrna. by the present criterion, different chloroplasts are shown to be related to one another and at least distantly to blue-green algae and perhaps to bacillaceae. these results argue in favor of an endosymbiont origin of the chloroplast.	1975	806081
photoreactivation of uv-irradiated blue-green algae and algal virus lpp-1.	ultraviolet (uv) sensitivity and photoreactivation of blue-green algae cylindrospermum sp., plectonema boryanum, spores of fischerella muscicola and algal virus (cyanophage) lpp-1 were studied. the survival value after uv irradiation of filaments of cylindrospermum sp. and virus lpp-1 showed exponential trend and these were comparatively sensitive towards uv than f.muscicola and p.boryanum. photoreactivation of uv-induced damage occurred in black, blue, green, yellow, red and white light in cyli ...	1975	807175
structures of biogenic origin from early precambrian rocks of euro-asia.	spheroidal microfossils mainly 20 to 100 mug in diameter and exhibiting granular surface textures have been recovered from early precambrian rocks by applying a new method of water separation in combination with thin chemical preparation. in contrast to the acritarcha, these microfossils are characterized by a relatively low specific weight (close to one) and considerable fragility due to impregnation by mineral matter. they occur in archean sediments of hindustan, in rocks of the baltic and ald ...	1975	807898
effect of pesticides on blue-green algae and nitrogen-fixation.	the effects of the pesticides, amitrol, a derivative of amitrol (viz. 3,5-diamino-1,2,4-triazole), diquat, paraquat, linuron, mcpa, malathion, and monuron, were studied on the nitrogen-fixing algae, anabaena cylindrica, aulosira sp., calothrix elenkenii. chlorogloeae frischii, cylindrospermum muscicola, nostoc sp. from collema tenax, nostoc muscorum tolypothrix tenuis, and westiellopsis sp. in general, two types of response were discernible; an initial period of depression succeeded by an increa ...	1975	808179
requirement of low oxidation-reduction potential for photosynthesis in a blue-green alga (phormidium sp.).	photosynthesis in a phormidium species which forms dense conical-shaped structures in thermal springs is strongly inhibited by aeration but is stimulated by sulfide and other agents (cysteine, thioglycolate, sulfite) which lower the oxidation-reduction potential. the compact structures which this alga forms in nature may restrict oxygen penetration from the enviroment so that the anaerobic or microaerophilic conditions necessary ofr photosynthesis can develop. the alga may be defective in a re ...	1975	808187
x-ray induced inactivation of the capacity for photosynthetic oxygen evolution and nitrate reduction in blue-green algae.		1975	808826
[decomposition of simazine herbicide in algal cultures].	the possibility of simazine accumulation and detoxication in the cultures of some species of green, yellow-green, and blue-green algae was investigated. it has been shown that the algae can accumulate simazine in amounts hundred times exceeding its concentration in the cultural medium. the protein fraction contained up to 28.8% of simazine accumulated by the algae. the accumulation of water-soluble products of simazine metabolism in the cultural medium is indicative of the partial transformation ...	1975	809645
the heterocysts of blue-green algae (myxophyceae).		1975	810188
formation of one-dimensional patterns by stochastic processes and by filamentous blue-green algae.		1975	810378
molecular mechanisms for dna repair in the blue-green algae.		1975	811209
report on a biochemical red tide repressive agent.	organisms were isolated from the november 1973 red tide outbreak in a search for a naturally occurring predator organism. two organisms were found which look promising as a means of biocontrol: a tintinnideae spp., ciliate and gomphosphaeria aponina kutzing, a blue-green algae. this report characterizes a blue-green algal toxin found to be lethal to the florida red tide organism gymnodinium breve davis.	1975	812692
evolutionary information involved in primary structures of chloroplast-type ferredoxins.	the complete amino acid sequence of a chloroplast-type ferredoxin from a fresh water prokaryote, aphanothece sacrum, was determined. the sequence consisted of 96 amino acid residues and was homologous to those of ferredoxins of higher plants. comparison of eight ferredoxins, including one from a green alga and three from blue-green algae, suggested that the sequences of algal ferredoxins were as different from one another as from those of higher plants. the relationship between the numbers of di ...	1975	818076
on the prokaryotic nature of red algal chloroplasts.	the sequences of oligonucleotides released by t1 ribonuclease digestion of 32-p-labeled 16s (chloroplast) and 18s (cytoplasmic) ribosomal rnas from a marine species of porphyridium (rhodophyta) have been determined. the resultant catalogs have been compared to those obtained for three prokaryotes:escherichia coli, bacillus subtilis, and anacystis nidulans (a blud-green alga). there is extensive sequence homology between the porphyridium chloroplast 16s ribosomal rna and each of the prokaryotic 1 ...	1975	1056032
on the origin of plastids.	the buoyant density in cscl of ribosomes from chloroplasts of the green alga chlorella pyrenoidosa and two species of higher plants, pisum sativum and chenopodium album, has been studied. from the relative protein content it was calculated that 70s ribosomes from chloroplasts are much smaller than 80s cytoplasmic ribosomes (3.0-3.1 x 10(6) and 4.0 x 10(6) daltons) and slightly larger than 70s ribosomes from bacteria (e. coli 2.5 x 10(6) daltons). chloroplast ribosomes from pea seedlings were ana ...	1975	1103046
the begginning of photosynthesis.	there is no evolutionary continuity between photochemical abiosynthesis and bacterial photosynthesis. rather, the photosynthetic bacteria are descendants of fermenters that did not use light. photosynthesis and respiration, both using electron flow coupled with phosphorylation, have a common origin ('conversion hypothesis'), but photosynthesis came first. anaerobic (nitrate or sulphate) respiration cannot have preceded photosynthesis as neither nitrate nor sulphate existed on the early earth. su ...	1975	1153184
photochemical activity and components of membrane preparations from blue-green algae. i. coexistence of two photosystems in relation to chlorophyll a and removal of phycocyanin.		1974	4153919
[reactivity of the volatile exometabolites of some blue-green algae, bacteria, fungi and actinomycetes].		1974	4211622
the isolation of gas vesicles from blue-green algae.		1974	4214028
photochemical activity and components of membrane preparations from blue-green algae. ii. low-temperature photooxidation of cytochrome b559.		1974	4214171
[oxygen consumption by blue-green algae].		1974	4214568
the program of protein synthesis during heterocyst differentiation in nitrogen-fixing blue-green algae.		1974	4214619
control of macromolecular composition and cell division in the blue-green algae anacystis nidulans.		1974	4214895
estimation of the genome size of blue-green algae from dna renaturation rates.		1974	4215395
d-ribulose 1, 5-diphosphate carboxylase from blue-green algae.		1974	4216351
[concentration of several polyvalent metals in blue-green algae].		1974	4217423
phycobilisomes in blue-green algae.	fifteen species of freshwater blue-green algae, including unicellular, filamentous, and colonial forms, were subjected to a variety of fixatives, fixation conditions, and stains for comparison of the preservation of phycobilisomes. absorption spectra of the corresponding in vivo and released photosynthetic pigments, in 10 of the species that were maintained in culture, demonstrated the presence of phycocyanin in all 10 species and phycoerythrin in only 2 of them. spectroscope and electron micros ...	1974	4204443
[a study of the dying off of blue-green algae in the dark].		1974	4208198
preliminary analysis of lipids and fatty acids of green bacteria and chloroflexus aurantiacus.	the complex lipids and fatty acids of the seven type species of green bacteria and three strains of chloroflexus aurantiacus were analyzed. the green bacteria contained lipids that behaved as cardiolipin and phosphatidylglycerol on thin-layer chromatography. they did not contain phosphatidylethanolamine or phosphatidylserine. similarly, chloroflexus contained lipids that behaved as phosphatidylglycerol and phosphatidylinositol on thin-layer chromatography and did not contain phosphatidylethanola ...	1974	4421249
soluble & membrane-bound superoxide dismutases in a blue-green algae (spirulina)and spinach.		1974	4364622
[gas vacuoles in blue-green algae and bacteria].		1974	4366354
phosphate metabolism in blue-green algae. i. fine structure of the "polyphosphate overplus" phenomenon in plectonema boryanum.		1974	4371465
macromolecule metabolism and photosynthetic functions in blue-green algae treated with virginiamycin, an inhibitor of protein synthesis.	the m component of virginiamycin inhibited growth of plectonema boryanum under both photoautotrophic and heterotrophic conditions. though the s component of this antibiotic had no apparent activity per se, it enhanced the inhibitory action of its partner. cells incubated with suitable concentrations of either m or m + s stopped growing and lysed. loss of the colony-forming capacity occurred quickly in the presence of m + s and slowly in the presence of m alone. virginiamycin m inhibited protein ...	1974	15828183
transvaal stromatolite: first evidence for the diversification of cells about 2.2 x 109 years ago.	the well-preserved fossil remnants of filamentous blue-green algae have been found in petrographic thin sections of a dolomitic limestone stromatolite in the transvaal sequence of south africa. some of these filaments contain enlarged cells which are interpreted as akinetes. a new species and genus, petraphera vivescenticula, is proposed for this microfossil, which is morphologically similar to the living cyanophyte genus raphidiopsis. this would constitute the first known occurrence of cell div ...	1974	17773039
bacterial stromatolites: origin of laminations.	laminated mats composed of motile filamentous photosynthetic bacteria and nonmotile unicellular blue-green algae occur in a large number of yellowstone hot springs at temperatures between 55 degrees and 70 degrees c. field studies indicate that the bacteria are the predominant mat-forming component. under low light intensities, mats composed exclusively of bacteria can be formed. the bacteria undergo a diurnal migration, moving on top of the algae dnring the night and becolming mixed again with ...	1974	17736194
suppression of nitrogen fixation by blue-green algae in a eutrophic lake with trace additions of copper.	nitrogen fixation by blue-green algae in highly eutrophic clear lake, california, was severely inhibited by trace amounts of copper. the chelation capacity of the lake is probably saturated by indigenous copper. additions were only 1/200 of those normally used in algal control. since nitrogen fixation provides half of the lake's annual nitrogen budget, economical eutrophication control appears possible.	1974	17781930
epr signals of oxidized plastocyanin in intact algae.	(1) an electron paramagnetic resonance (epr) signal was observed at g = 2.05 in the low temperature spectra of intact cells of green, red and blue-green algae and of spinach chloroplasts. the g-value and the shape of the signal were similar to that of purified, soluble plastocyanin. (2) the amount of the copper protein, determined from the epr signal height, was estimated to be nearly the same in all the studied organisms on the basis of the concentration of chlorophyll. furthermore, it was foun ...	1974	19400039
formation of carbon monoxide and bile pigment in red and blue-green algae.	five blue-green and one red algal species produced carbon monoxide during photosynthetic growth. the blue-green algae synthesized co and phycocyanobilin in equimolar quantities at identical rates. the red alga, porphyridium cruentum, incorporated delta-aminolevulinic acid-5-(14)c into phycoerythrobilin and co. the ratio of the specific radioactivity of phycoerythrobilin to that of co, and the kinetics and stoichiometry of phycocyanobilin and co formation suggest that linear tetrapyrroles in plan ...	1973	16658300
action spectra for chromatic adaptation in tolypothrix tenuis.	the dark synthesis of biliproteins in the blue-green alga tolypothrix tenuis is controlled by brief light treatments. green light potentiates synthesis of phycoerythrin and red light potentiates synthesis of phycocyanin. red reverses the effect of green and vice versa. action spectra for the red and green effects were obtained for the wavelength region 320 nanometers to 710 nanometers, at 10-nanometer intervals. the principal action band in the red peaks at 660 nanometers, with a half-band width ...	1973	16658334
the detection of a bound ferredoxin in the photosynthetic lamellae of blue-green algae and other oxygen evolving photosynthetic organisms.		1973	4350064
blue-green algae: why they become dominant.	the injection of carbon dioxide and the addition of nitrogen and phosphorus to a lake population dominated by blue-green algae results in a rapid shift to dominance by green algae. the basis for the change and its implications are discussed.	1973	4630211
formation of hybrid proteins form the and subunits of phycocyanins of unicellular and filamentous blue-green algae.		1973	4630850
physiology and cytological chemistry blue-green algae.		1973	4633592
ammonia assimilation in blue-green algae.		1973	4632607
[electron miscroscopic study of the morphogenesis of the blue-green algae virus].		1973	4208366
[liberation of molecular hydrogen by cultures of blue-green algae].		1973	4209236
[lysis of blue-green algae by an agent of nonviral character].		1973	4205238
[formation of the infectious form of the blue-green algae virus in plant tissue culture].		1973	4205965
[nitrogen excretion by nitrogen fixing blue-green algae. i. growth of anabaena cylindriea and nostoc muscorum in various media, at different temperatures, and under light of different wavelengths (author's transl)].		1973	4272180
lower ph limit for the existence of blue-green algae: evolutionary and ecological implications.	observations on a wide variety of acidic environments, both natural and man-made, reveal that blue-green algae (cyanophyta) are completely absent from habitats in which the ph is less than 4 or 5, whereas eukaryotic algae flourish. by using enrichment cultures with inocula from habitats of various ph values, the absence of blue-green algae at low ph was confirmed.	1973	4196167
measurement of the cyanophycin granule polypeptide contained in the blue-green alga anabaena cylindrica.	an assay was developed to determine the amount of cyanophycin granules in blue-green algae. the amount of this polypeptide in cells of anabaena cylindrica was measured as a function of culture age and was compared with changes in other proteinaceous cellular components. the data presented support the notion that the cyanophycin granule is a cellular nitrogen reserve.	1973	4197270
[activity of fructose-1,6-diphosphate aldolase in blue-green algae].		1973	4197706
simple methods for plating single vegetative cells of, and for replica-plating, filamentous blue-green algae.		1973	4197882
loss of photosynthetic activity in two blue-green algae as a result of osmotic stress.	a progressive loss of photosynthetic activity occurred when cells of anacystis nidulans and coccochloris peniocystis were incubated in increasing concentrations of osmotica from 0.2 to 0.7 m, and there was a release of pteridine from the cells proportional to the loss of photosynthetic activity.	1973	4197908
electron microscope and physical chemical characterization of c-phycocyanin from fresh extracts of two blue-green algae.		1973	4199438
effect of pesticides on blue-green algae.		1973	4120877
structure and localization of long-chain glycolipids in the heterocyst envelope of a blue-green algae.		1973	4127514
pyridine nucleotide-dependent glucose dehydrogenase activity in blue-green algae.	pyridine nucleotide-dependent glucose dehydrogenase activity (gpnd) is described for the first time in cell-free extracts of certain blue-green algae. when glucose is added to these crude cell extracts, nicotinamide adenine dinucleotide phosphate is reduced at twice the rate as nicotinamide adenine dinucleotide; but evidence suggests that this activity is due to a single enzyme. the distribution and level of gpnd in selected blue-green algae correlates with the heterotrophic potential of each sp ...	1973	4144590
fine control of citrate synthase activity in blue-green algae.		1973	4147752
the synthesis and stability of ribosomal rna in blue-green algae.		1973	4200178
differentiation in nostoc muscorum: nitrogenase is synthesized in heterocysts.	cellular differentiation can be observed in certain filamentous blue-green algae after transfer of the cells from medium containing nh(4) (+) or no(3) (-) to nitrogen-free medium. the appearance of differentiated cells (heterocysts) is accompanied by an increase in the activity of nitrogenase, an enzyme complex that reduces n(2) to nh(3). we have separated vegetative cells from heterocysts in differentiated filaments of nostoc muscorum, and analyzed their proteins by polyacrylamide-gel electroph ...	1973	4200722
the labeling of nucleic acids by radioactive precursors in the blue-green algae anacystis nidulans and synechocystis aquatilis sanv.		1973	4201019
[effect of carbon-containing compounds on the chromatic characteristics of anacystis nidulans blue-green algae].		1973	4201591
cyanophages-viruses attacking blue-green algae.		1973	4202147
the genetics of blue-green algae.		1972	4199772
photosynthetic nitrogen fixation by blue-green algae.		1972	4218898
isolation and characterization of as-1, a phycovirus infecting the blue-green algae, anacystis nidulans and synechococcus cedrorum.		1972	4110125
[flexibacterium lyzing blue-green algae].		1972	4633037
simulation of organisms using a developmental model. 2. the heterocyst formation problem in blue-green algae.		1972	4631547
ribosomal ribonucleic acid and ribosomal precursor ribonucleic acid in anacystis nidulans.	the rna of the blue-green alga anacystis nidulans contains three ribosomal rna species with molecular weights of 0.56x10(6), 0.9x10(6), and 1.1x10(6) if the rna is extracted in the absence of mg(2+). the 0.9x10(6)mol.wt. rrna is extremely slowly labelled in (32)p-incorporation experiments. this rrna may be a cleavage product of the 1.1x10(6)mol.wt. rrna from the ribosomes of cells in certain physiological states (e.g. light-deficiency during growth). the cleavage of the 1.1x10(6)mol.wt. rrna dur ...	1972	4630449
oxidation--reduction properties of phytoflavin, a flavoprotein from blue-green algae.		1972	4402991
the heterocysts of blue-green algae. 3. differentiation and nitrogenase activity.		1972	4403286
fatty acid composition of unicellular strains of blue-green algae.	the fatty acids of 34 strains of unicellular blue-green algae provisionally assigned to the genera synechococcus, aphanocapsa, gloeocapsa, microcystis, and chlorogloea by stanier et al. have been chemically characterized. the strains analyzed can be divided into a series of compositional groups based upon the highest degree of unsaturation of the major cellular fatty acids. twenty strains fall into the group characterized by one trienoic fatty acid isomer (alpha-linolenic acid), and seven strain ...	1972	4621688
homology between nucleic acids of blue-green algae and chloroplasts of euglena gracilis.	ribosomal rna from several blue-green algae was hybridized to dna from euglena gracilis chloroplasts by the membrane filter procedure. this hydridization was competitive with chloroplast ribosomal rna and indicates significant genetic homology between blue-green algae and plastids from euglena gracilis.	1972	4621951
photooxidation of 3,3'-diaminobenzidine by blue-green algae and chlamydomonas reinhardii.		1972	4623089
fatty acid composition and physiological properties of some filamentous blue-green algae.		1972	4623694
[serological investigations on thylakoids of photosynthetic bacteria and blue-green algae].		1972	4623872
[blue-green algae in norwegian inland waters. the possible health consequences in man and animals].		1972	4623926
[intercellular interactions and recovery of the population of plectonema boryanum blue-green algae following gamma-irradiation].		1972	4624190
[photoinduced ph changes in cell suspensions of the blue-green algae anabaena variabilis and synechosystis aquatilis].		1972	4625326
[correlation of photo-induced ph changes in cell suspensions of obligate phototrophic blue-green algae with photosynthetic o2 evolution and after-light respiration].		1972	4625445
mesosomes in blue-green algae.		1972	4626335
antimicrobial effects of cellvibrio on blue-green algae.		1972	4626336
photooxidative death in blue-green algae.	when incubated in the light under 100% oxygen, wild-type blue-green algae (anacystis nidulans, synechococcus cedrorum) die out rapidly at temperatures of 4 to 15 c, and at 35 c (or at 26 c in the case of s. cedrorum) in the absence of co(2). photosynthesis is impaired in these cells long before they die. blocking of photosystem ii at high temperatures in the presence of co(2) sensitizes the algae to photooxidative death. photooxidative death and bleaching of photosynthetic pigments are separable ...	1972	4626540
photosynthetic and dark carbon metabolism in unicellular blue-green algae.		1972	4628178
characterization of the ribosomal ribonucleic acids of blue-green algae.		1972	4628668
light effect on the internal osmotic pressure of the blue-green algae plectonema boryanum and phormidium luridum.		1972	4629378
metabolism of glucose by unicellular blue-green algae.		1972	4629415
tetrazolium reduction and nitrogenase activity in heterocystous blue-green algae.		1972	4629416
the activity of deoxyribonucleic acid polymerase in some species of algae.	1. the activities of dna polymerase preparations from the algae euglena gracilis, chlamydomonas reinhardtii, chlorella pyrenoidosa, anabaena variabilis and anacystis nidulans were measured. the blue-green algae anabaena and anacystis contain a 5-20-fold higher activity of the enzyme than do the green algae. dna polymerases from the blue-green algae show a ph optimum of 9 and prefer a relatively low mg(2+) concentration (1-3mm). dna polymerases from the green algae, however, display a ph optimum ...	1972	4629975
[molybdenum and cobalt requirements of nitrogen-fixing blue-green algae with different nitrogen sources].		1972	4630048
cytochrome oxidase activity in cell-free preparations from blue-green algae.		1972	16657938
studies with deoxyribonucleic acid from blue-green algae.	dna from two blue-green algae was isolated and characterized. the buoyant densities, thermal denaturation and renaturation, thermal melting values, base compositions, sedimentation coefficients, and molecular weights were determined. blue-green algal dna renatured extensively and at a comparable rate to that of bacterial dna. the similarities among the kinds of dna from bacteria and blue-green algae were interpreted to reflect a close relationship.	1972	16657954
photoreversible pigment: occurrence in a blue-green alga.	a new photoreversible pigment has been isolated from the blue-green alga tolypothrix tenuis. this pigment bears certain resemblances to phytochrome, except that absorption maxima for the two forms are in the green and red portions of the spectrum instead of the red and far-red. the pigment may control diverse differentiative processes in blue-green algae.	1972	17778430