Morphology and nutrition of the colonial green algaScenedesmus: 80 years later

Trainor, Francis R.; Cain, Jerome R.; Shubert, L. Elliot

doi:10.1007/bf02860860

Cited by 53 publications

(20 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The shape and form change in accordance with changing conditions, but the algae species remains fundamentally the same. Similar findings have been reported by Shubert & Trainor (I974), and Trainor et al (1976) in vitro; the changes in Scenedesmus sp. are interpreted in the latter works as a polymorphic phenomenon.…”

Section: Algal Species In the High Rate Pondssupporting

confidence: 80%

Algal polymorphism in high rate wastewater treatment ponds

1981

View full text Add to dashboard Cite

In the past as well as today there have been two conflicting opinions as to whether changes in the algal species in water bodies indicate polymorphism or the development of separate species. Similar changes were also found in High Rade Algae Pond (HRAP) used for wastewater treatment, effluent reclamation and protein production. To critically examine both opinions, samples of HRAP effluent were taken and the algal species identified and measured continuously, using conventional methods.Two main algal species were identified. These remained stable during all four monitoring sessions over a three-year period. The external changes observed in the algae were a reflection of controlled periods of organic loading and the conditions under which the pond was operated, such as retention time (a dependent of radiation), ambient temperature, effluent depth and aeration methods.

show abstract

Section: Algal Species In the High Rate Pondssupporting

confidence: 80%

Algal polymorphism in high rate wastewater treatment ponds

1981

View full text Add to dashboard Cite

show abstract

“…2c). Chemical composition of the growth medium, light characteristics (wavelengths), and predator levels has been shown to cause similar morphology changes in Scenedesmus species (Khlebovich and Degtyarev 2005;Pickett-Heaps and Staehelin 1975;Trainor et al 1976;Cepák et al 2006). In addition, the high pH cultures, unbuffered and the pH 10.3 buffered (Fig.…”

Section: Resultsmentioning

confidence: 98%

Medium pH and nitrate concentration effects on accumulation of triacylglycerol in two members of the chlorophyta

et al. 2010

View full text Add to dashboard Cite

Algal-derived biodiesel is of particular interest because of several factors including: the potential for a nearcarbon-neutral life cycle, the prospective ability for algae to capture carbon dioxide generated from coal, and algae's high per acre yield potential. Our group and others have shown that in nitrogen limitation, and for a single species of Chlorella, a rise in culture medium pH yields triacylglycerol (TAG) accumulation. To solidify and expand on these triggers, the influence and interaction of pH and nitrogen concentration on lipid production was further investigated on Chlorophyceae Scenedesmus sp. and Coelastrella sp. Growth was monitored optically and TAG accumulation was monitored by Nile red fluorescence and confirmed by gas chromatography. Both organisms grew in all treatments and TAG accumulation was observed by two distinct conditions: high pH and nitrogen limitation. The Scenedesmus sp. was shown to grow and produce lipids to a larger degree in alkaliphilic conditions (pH >9) and was used to further investigate the interplay between TAG accumulation from high pH and/or nitrate depletion. Results given here indicate that TAG accumulation per cell, monitored by Nile red fluorescence, correlates with pH at the time of nitrate depletion.

show abstract

“…In the 1960s and 1970s morphological variation within the genus Scenedesmus became well docu mented (Trainor, Cain & Shubert, 1976). Many of the morphological studies dealt with spine patterns and wall ornamentations.…”

Section: Introductionmentioning

confidence: 98%

Morphological control and physiology of Scenedesmus strain 170

Siver

Trainor

1981

Phycologia

Self Cite

View full text Add to dashboard Cite

Control of the unicellular stage of ScelledesnllIS strain 170 was shown to be a complex phenomenon involving a number of factors. Nitrogen, as ammonium, was the main factor involved in controlling unicell fo rmation. High light intensities, temperatures between 22 and 28°C, and cell pretreatment in a medium of low total salts (medium 7) all increased unicell percentages. Cell pretreatment in a medium of high total salts (Bristol's medium) yielded reduced unicell levels.It was proposed that the effect of light, temperature and cell pretreatment on unicell formation was secondary depending on their interaction with nitrogen metabolism. Cell ultrastructure, internal nitrogen and carbo hydrate levels, and ammonium uptake rates for cells pretreated in both medium 7 and Bristol's medium are compared in support of the role of nitrogen metabolism in unicell production.

show abstract

Morphology and nutrition of the colonial green algaScenedesmus: 80 years later

Cited by 53 publications

References 10 publications

Algal polymorphism in high rate wastewater treatment ponds

Algal polymorphism in high rate wastewater treatment ponds

Medium pH and nitrate concentration effects on accumulation of triacylglycerol in two members of the chlorophyta

Morphological control and physiology of Scenedesmus strain 170

Contact Info

Product

Resources

About