Environmental Conditions and Morphological Variation in the Blue-Green Alga Chlorogloea fritschii

Evans, Elizabeth; Foulds, I. J.; Carr, N. G.

doi:10.1099/00221287-92-1-147

Cited by 44 publications

(29 citation statements)

References 5 publications

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“…Recently, Evans et al (1976) studied the effect of culture conditions on the morphology of Chlorogloeopsis fritschii (strain PCC 69 12) and found that the filamentous phase of development is repressed under photoheterotrophic and chemoheterotrophic growth conditions. The ability of this heterocystous organism to divide in more than one plane precludes an assignment to Nostoc, which was suggested by Schwabe & El Ayouty (1966).…”

Section: Reference Strain: Pcc 7102mentioning

confidence: 99%

Generic Assignments, Strain Histories and Properties of Pure Cultures of Cyanobacteria

et al. 1979

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On the basis of a comparative study of 178 strains of cyanobacteria, representative of this group of prokaryotes, revised definitions of many genera are proposed. Revisions are designed to permit the generic identification of cultures, often difficult through use of the field-based system of phycological classification. The differential characters proposed are both constant and readily determinable in cultured material. The 22 genera recognized are placed in five sections, each distinguished by a particular pattern of structure and development. Generic descriptions are accompanied by strain histories, brief accounts of strain properties, and illustrations; one or more reference strains are proposed for each genus. The collection on which this analysis was based has been deposited in the American Type Culture Collection, where strains will be listed under the generic designations proposed here. I N T R O D U C T I O NThe cyanobacteria constitute one of the largest sub-groups of Gram-negative prokaryotes. As a result of their traditional assignment to the algae, the classification of these organisms was developed by phycologists, working under the provisions of the Botanical Code (Stafleu et al., 1972). Almost entirely on the basis of observations on field materials, about 150 genera and well over lo00 species have been described. The discriminatory properties, both generic and specific, are either structural or ecological, these being virtually the only characters determinable in the field. Types are represented by herbarium specimens or, failing these, by descriptions and illustrations; cultures are not recognized as valid type materials under the Botanical Code.The attempt to identify cyanobacteria in culture through this field-based system of classification leads to many difficulties and ambiguities. The limited and necessarily provisional taxonomic goal of the present article is to redefine certain cyanobacterial genera in such a way that simple and clear-cut generic assignments can be made for cultures. It is based on our experience over the past decade with pure strains representative of all major sub-groups of cyanobacteria. As far as possible, we have attempted to maintain the system of generic nomenclature and the generic definitions now used by phycologists (Bourrelly, 1970;Geitler, 1932;Desikachary, 1959). However, when the discriminatory characters that nominally distinguish two genera are either not determinable on cultures or within the range of variation of a single strain, the existing genera have been combined. Some of the proposed generic definitions include discriminatory characters that have not hitherto received taxo-

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Section: Reference Strain: Pcc 7102mentioning

confidence: 99%

Generic Assignments, Strain Histories and Properties of Pure Cultures of Cyanobacteria

et al. 1979

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“…Chlorogloeopsis fritschii (Mitra) Mitra et Pandey is a filamentous heterocystous cyanobacterium and shows variations in morphology and diversities of functions. It can also tolerate varieties of climatic conditions required for growth and survival (Evans et al, 1976) like that of other blue green algal species (Halder and Sinha, 2013a). This blue-green alga can fix atmospheric nitrogen to a limited extent in soil (Fay, 1965) and nitrogen-fixing activity is found greatest during exponential growth in smallcelled filaments that developed from the endospores (Fay et al, 1964).…”

Section: Our Nature│december 2016│14 (1): 92-98mentioning

confidence: 99%

Note on taxonomy of Chlorogloeopsis fritschii (Mitra) Mitra et Pandey with soil analysis, collected from a rice field in West Bengal, India

Halder¹

2017

Our Nature

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While studying on paddy field blue green algae, author for the first time recorded a blue green algal species Chlorogloeopsis fritschii (Mitra) Mitra et Pandey from rice field soil in summer during 2013 in Hooghly, West Bengal, India. In the present paper, taxonomical description with microphotographs of the species has been provided. In addition to that, soil which was collected from the algal occurrence site has been analyzed. The different physico-chemical parameters of soil were as followed: pH: 7.1; EC: 0.142 dSm ; WHC: 45%. Soil textures were as: sand: 36.2%, slit: 28.1% and clay: 35.7%. This study of soil showed its nature and present nutrient content. As the alga contains heterocyst and can fix atmospheric nitrogen to soil so, it can apply in rice fields as biofertilizer to enhance the yield of rice and increase of soil fertility.

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“…Particular attention was paid to characterizing CO 2 and HCO 3 ± transport, Ci accumulation ratios, extracellular CA activity and carboxysome expression, since these parameters cover the range of CCM activities. Chlorogloeopsis was chosen as a test organism since there is a substantial body of information relating to its mixotrophic and chemoheterotrophic growth patterns (Peat and Whitton 1967;Findley et al 1970;Miller and Allen 1972;Evans et al 1976) and since previous studies had examined Rubisco localization (Hawthornthwaite et al 1985) and established the presence of a CCM in this strain (Skleryk et al 1997).…”

Section: Introductionmentioning

confidence: 99%

Effects of carbon nutrition on the physiological expression of HCO 3 - transport and the CO 2 -concentrating mechanism in the cyanobacterium Chlorogloeopsis sp. ATCC 27193

Skleryk

Espie

2002

Planta

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We have examined the effect of inorganic and organic carbon nutrition on the physiological expression of HCO3- transport and the CO2-concentrating mechanism (CCM) in the nutritionally versatile cyanobacterium Chlorogloeopsis sp. ATCC 27193. Cells grown under photoautotrophic conditions in the presence of limiting or replete levels of inorganic carbon (Ci), or grown under mixotrophic (light) or chemoheterotrophic (dark) conditions in the presence of sucrose retained both active CO2 and Na(+)-independent HCO3- transport activity. However, two distinct effects on the kinetic properties of HCO3- transport were observed, which segregated on the basis of phototrophic and chemoheterotrophic growth in the dark. In the former, the apparent substrate affinity of the HCO3- transport system (K0.5) varied (12-fold) in response to the growth Ci or mixotrophy while the maximum rate of HCO3- transport was approximately constant. In the latter case, the K0.5 value was unchanged from the starting value (35 microM) of Ci-limited photoautotrophic cells used to initiate the dark-grown cultures, but transport capacity declined 3-fold. Modulation of the K0.5 (HCO3- transport) value required light. Cellular carboxysome content was unaffected by growth under any of the regimes employed and these structures were the predominant location of ribulose-1,5-bisphosphate carboxylase/oxygenase, as indicated by immunogold electron microscopy. Mixotrophic and chemoheterotrophic growth resulted in a diminished ability to concentrate Ci internally and a reduction in Ci accumulation ratios at low external Ci concentrations. The relationship between photosynthetic carbon fixation and the internal Ci pool varied by 2-fold, with high-Ci-grown cells being the most efficient and mixotrophically grown cells the least, indicating that there was limited capacity to modulate this relationship in response to changes in carbon nutrition. Within broad limits this relationship appeared to be a fixed trait of the strain and an important factor in determining growth rate.

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Environmental Conditions and Morphological Variation in the Blue-Green Alga Chlorogloea fritschii

Cited by 44 publications

References 5 publications

Generic Assignments, Strain Histories and Properties of Pure Cultures of Cyanobacteria

Generic Assignments, Strain Histories and Properties of Pure Cultures of Cyanobacteria

Note on taxonomy of Chlorogloeopsis fritschii (Mitra) Mitra et Pandey with soil analysis, collected from a rice field in West Bengal, India

Effects of carbon nutrition on the physiological expression of HCO 3 - transport and the CO 2 -concentrating mechanism in the cyanobacterium Chlorogloeopsis sp. ATCC 27193

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