Edmund R. Cox

Bio: Edmund R. Cox is an academic researcher from Tennessee Wesleyan College. The author has contributed to research in topics: Genus & Neospongiococcum. The author has an hindex of 1, co-authored 1 publications receiving 11 citations.

The genera Spongiococcum and Neospongiococcum. II. Species of Neospongiococcum with labile walls1,2

Abstract: Several species of the genus Neospongiococcum are described. The cell walls of these species, unlike other species of the genus, apparently are not composed of cellulose. Methods to determine cell ...

The culture collevtion of algae at the university of texas ataustin 123

Abstract: TIic Culture Collection of Algac at The University of Texas (Ul EX) at Austin was formerly located at Indiana University, Bloomington. In the summer of 1976 when the writer joined ihc faculty of the Department of Botany at The University of Texas, plans were formtilated for moving ihe Collection. With the cooperatioti of the National Science Foundation atid the Administrations of Indiana University and The University of Texas at Austin, the move was made duritig 1976-77 without atiy interruption of service to the scientific community. The Utiiversiiy of Texas has (lrovided and equipped physical facilities for the maintenance and o{>etation of the Collection. The contitiued support of the Collection as a natiotial researcli resource by the National Science Foundation is gratefully acknowledged. The Fottndation provides ihe tnajor fttiancial supjjon fur the actual oi>eration of the Collection, but funds received frotn the sale of ctiltutes are mainlairivd in a special account for partial support of Collection needs such as postage, supplies, secretarial help» etc.

The systematics and ecology of soil algae

Abstract: Algae occur in nearly all terrestrial environments on earth and are invariably encountered both on and beneath soil surfaces. The algal flora of the soil includes members of the Cyanochloronta, Chlorophycophyta, Euglenophycophyta, Chrysophycophyta, and Rhodophycophyta. Thirty-eight genera of prokaryotic and 147 genera of eukaryotic algae include terrestrial species, the majority of which are edaphic. Whereas systematic nomenclature of blue-green algae adheres to traditional classification based upon morphological features, proper taxonomic treatment of eukaryotic soil algae is predicated on standard methods of culture and interpretation of physiological attributes, plant mass characteristics, and morphological properties of axenic clones. While knowledge of the physiological ecology of soil algae is primarily based on laboratory evidence, it is well established that solar radiation, water, and temperature are the most important abiotic factors governing their distribution, metabolism, and life history strategies. Biotic interactions are often as important, whereas ionic factors (including pH), oxidation-reduction potential, and soil texture are less important, if only because their influences are less well understood. Algae play an important role in primary and secondary plant community succession by acting as an integral part of the colonial synusium. The principal functional attributes of algal communities in soil include primary production, dinitrogen fixation, and stabilization of aggregates. Although as many as 108 algae per gram have been documented, soils commonly support between 103 and 104 per gram. As an avenue for the incorporation of carbon and nitrogen and for minimizing erosion through stabilization of aggregates, algae are valuable in agriculture. Although manipulation of edaphic algal populations in temperate countries is of novel occurence, their successful use in India as a means for reclaiming saline soils and as a source of fertilizer nitrogen is well documented. Soil algae are affected by synthetic pesticides and pollutants. In general, most herbicides, fungicides, and soil fumigants are detrimental to soil algae while most insecticides are not. Algae have been utilized as biological assay organisms for anticipating crop response to both fertilizers and pesticides because of their biochemical similarity to higher plants and their quick generation time. As future research with soil algae leads to a greater awareness of their importance in soil, it might be anticipated that manipulation of populations in agricultural systems of temperate regions will become more widespread with consideration of the potential benefits of soil algae made by scientists in other disciplines.

The chemical composition of the cell wall of Chlamydomonas gymnogama and the concept of a plant cell wall protein.

Abstract: Cell walls of Chlamydomonas gymnogama, shed during sexual mating, were collected and analyzed. Ultrastructural examination indicates that the walls are free of cytoplasmic contamination and that they exhibit a regular lamellate structure. The walls are composed of glycoprotein rich in hydroxyproline. The hydroxyproline is linked glycosidically to a mixture of heterooligosaccharides composed of arabinose and galactose. Altogether, the glycoprotein complex accounts for at least 32% of the wall. The amino acid composition of the walls is extraordinarily similar in widely different plant species. The implications of these similarities as well as the widespread occurrence of these glycoproteins are discussed.

Zeaxanthin producing strains of Neospongiococcum Excentricum

Abstract: The present invention is directed toward a process for producing zeaxanthin which includes mutating algal microorganisms, selecting from said mutated microorganisms a microorganism capable of producing zeaxanthin, culturing the selected microorganism in an effective medium to produce zeaxanthin, and recovering zeaxanthin produced by the selected microorganism. The present invention also provides microorganisms capable of producing zeaxanthin, formulations containing zeaxanthin produced by the disclosed process and the use of such formulations to enhance pigmentation and to reduce damage caused by reactive oxygen species and phototoxic molecules.

Cell wall chemistry and ultrastructure of chlorococcum oleofaciens (chlorophyceae)1,2

Abstract: Cell walls of Chlorococcum oleofadens Trainor & Bold were examined ultrastructurally and chemically. The wall of zoospores has a uniform 30 nm width and a regular lamellar pattern. Zoospores and young vegetative cell walk exhibit periodicities, consisting of 20 nm ridges on the outer layer. Vegetative cell walls have a variable thickness of Up to 800 nm and are composed of multiple layers of electron dense material. Further, vegetative walk contain a microfibrillar material composed predominantly of glucose and presumed to be cellulose. Except for this cellulose, vegetative cell wall chemistry is very similar to that of Chlamydomemas being composed of glycoprotein rich in hydroxyproline. The hydroxyproline in Chlorococcum walls is linked glycosidically to a mixture of hetrooligosaccharides composed of arabinose and galactose, and in one instance, an unknown 6-deoxyhexose. Altogether, the glycoprotein complex accounts for at least 52% of the wall. The amino acid composition of the walls is stikingly similar to those of widely different plant species. Indirect evidence indicates zoospore cell walls are also chemically similar to those of Chlamydomonas, and like them, are cellulose free. Thus a major chemical difference between zoospore and vegetative cell walk of Chlorococcum is the presence of cellulose in the latter. The contribution of this microfibrillar cellulose to the physical properties of the vegetative wall is discussed.