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Article
Effects of solar UV radiation on aquatic ecosystems and interactions with climate change
Recent results continue to show the general consensus that ozone-related increases in UV-B radiation can negatively influence many aquatic species and aquatic ecosystems (e.g., lakes, rivers, marshes, oceans). So...
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Chapter and Conference Paper
Management of Nutritional and Health Needs of Malnourished and Vegetarian People in India
The maintenance of good health rests directly or indirectly on a strong nutritional foundation of plant foods. People everywhere require adequate amounts of essential macronutrients (proteins, carbohydrates, f...
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Article
Aquatic ecosystems: effects of solar ultraviolet radiation and interactions with other climatic change factors
Aquatic ecosystems are a key component of the Earth’s biosphere. A large number of studies document substantial impact of solar UV radiation on individual species, yet considerable uncertainty remains with res...
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Article
Sorption of metals by extracellular polymers from the cyanobacterium Microcystis aeruginosa fo. flos-aquae strain C3-40
The sorption of cadmium (II), copper (II), lead (II),manganese (II), and zinc (II) by purified capsularpolysaccharide from the cyanobacterium Microcystis aeruginosafo. flos-aquae strainC3-40 was examined by four ...
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Article
Nitrate, Ammonium, and Phosphate Uptake by the Immobilized Cells of Dunaliella salina
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Article
Lipid content and fatty acid composition in N2-fixing cyanobacterium Anabaena doliolum as affected by molybdenum deficiency
Anabaena doliolum grown under molybdenum deficiency produced less biomass (on a dry wt basis) and the cells had lower protein content but higher carbohydrate content than Mo-grown material. Molybdenum deficiency...
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Article
Lipid and hydrocarbon production byBotryococcus spp. under nitrogen limitation and anaerobiosis
The production of lipids and hydrocarbons in batch cultures of the algaeBotryococcus braunii andB. protuberans has been studied with respect to nitrogen limitation under aerobic and anaerobic conditions. Nitrogen...
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Article
Inhibitory effect of petroleum oil on photosynthetic electron transport system in the cyanobacteriumAnabaena doliolum
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Article
Hydrogen-supported nitrogenase activity in two cyanobacteria
The effects of hydrogen gas on nitrogenase activity of nitrogen-fixing cyanobacteriaAulosira fertilissima andChlorogloeopsis fritschii were studied. Addition of as little as 10% hydrogen either in air, N2, or N2+...
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Article
Isolation of a hydroxyproline-secreting pigment-deficient mutant ofNostoc sp. by metronidazole selection
A pigment-deficient mutant ofNostoc sp. was induced by N-methyl-N′-nitro-N-nitrosoguanidine and selected in a medium containing metronidazole. It formed chains of heterocysts, grew more slowly than the control, a...
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Article
Effects of some carbon sources on growth and nitrogen fixation in the cyanobacteriumNostoc linckia
Glucose, fructose, sucrose, maltose, and lactose stimulated photoheterotrophic growth ofNostoc linckia (Roth.)Born. as well as its heterocyst frequency, chlorophyll and protein contents, ammoniacal nitrogen uptak...
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Article
Effects of vanadium and tungsten on the nitrogen-fixing cyanobacteriumNostoc linckia
The effects of vanadium and tungsten on growth of the heterocystous cyanobacteriumNostoc linckia (Roth.) Born. and the activity of its nitrogenase and nitrate reductase were studied. While vanadate stimulated the...
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Article
Conjugation in the cyanobacterium Anacystis nidulans
Genetic recombination in the cyanobacterium Anacystis nidulans was first reported by Kumar (1962) and confirmed by Bazin (1968). Although genetic transformation in this organism was demonstrated by Shestakov and ...
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Article
Cellular differentiation and nitrogenase activity in the cyanobacteriumAnabaena
Nitrogenase activity at periods of differentiation of heterocysts and akinetes was assayed by the acetylene reduction technique. There was no nitrogenase activity in ammoniumgrown, non-heterocystousAnabaena sp.; ...
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Article
Canavanine-lnduced inhibition of growth and heterocyst differentiation inAnabaena doliolum and isolation of a canavanine-resistant mutant
The effect of the arginine analogue, canavanine on growth and heterocyst differentiation in the nitrogen-fixing algaAnabaena doliolum has been studied. The analogue inhibited growth and heterocyst differentiation...
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Article
Differential effects of amino acid analogs on growth and heterocyst differentiation in two nitrogen-fixing blue-green algae
Effects of a few amino acid analogs on growth and heterocyst differentiation have been studied in two nitrogen-fixing species ofAnabaena. All the analogs except α-methyl-dl-aspartic acid inhibited growth. Exposur...
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Article
Chromatic adaptation and photoreversal in blue-green algaCalothrix clavata West
Complementary chromatic adaptation, a well-established phenomenon in some blue-green algae, has been observed inCalothrix clavata, a heterocystous blue-green alga of the family Rivulariaceae. The chromatic adapta...
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Book
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Chapter
Bacillariophyta
The Bacillariophyta, popularly called diatoms, comprise a homogeneous assemblage of unicellular and colonial forms that differ generally from other algae in possessing highly sculptured and symmetrically ornam...
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Chapter
Introduction
The algae comprise a large and heterogeneous assemblage of relatively simple plants which have little in common except their characteristic oxygen evolving type of photosynthesis. They exhibit great diversity ...
