The Culture Collection of Algae at Indiana University

Starr, Richard C.

doi:10.1002/j.1537-2197.1964.tb06731.x

Cited by 438 publications

(51 citation statements)

References 50 publications

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“…For host range experiments over 60 unialgal isolates of freshwater algae were made from collections from southwestern Ontario and over 100 more were obtained from the culture collection a t Indiana University (Starr 1964).…”

Section: Methodsmentioning

confidence: 99%

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Chytrids and Algae: I. Host–substrate Range, and Morphological Variation of Species of Rhizophydium

Barr¹,

Hickman²

1967

Can. J. Bot.

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Studies of pathogenicity and of morphological variation were made with pure cultures of IChizopkydiu?iz spkaerocarpum isolated from Spirogyra and of R. karlingii isolated from Ulothrix. R. splcaerocarpz~m was parasitic, virtually confined t o species of Spirogyra amongst which there was a wide range of susceptibility. R. karlingii grew only on non-living algae and on pine pollen. The rhizoidal system of R. splzaerocarpum was quite variable in the extent of its branching.Variations in sporangium size and of the forms of the endobiotic portion of t h e thallus in R. karlingiigrown on different substrates were observed. Such variations have been used in t h e past as the basis for creation of new taxa. Pathogenicity tests with Paterson's strain of R. sphaerocarpz~m confirmed that it is saprophytic on many algae and on pine pollen in contrast with the strain isolated from Spirogyra.

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Section: Methodsmentioning

confidence: 99%

“…Isolation of two species of Rhizophydium, from Spirogyra and Ulothrix, respectively, during a survey of chytrids occurring on algae in southivestern Ontario, in 1963 and1964, provided opportunity for experimental study of both of these problems. The results are summarized belo~v and in a succeeding paper.…”

Section: Introductionmentioning

confidence: 99%

Chytrids and Algae: I. Host–substrate Range, and Morphological Variation of Species of Rhizophydium

Barr¹,

Hickman²

1967

Can. J. Bot.

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“…The highest forms of this series, Pleodorina and Volvox, have a differentiation of purely vegetative cells and reproductive cells. All species were cultured in Pringsheim's soil-water medium (Starr, 1960) in half-pint, glass milk bottles. It was, therefore, of interest to examine genera within such an evolutionary series to determine if any ultrastructural features of the cells could represent correlative increases in complexity.…”

mentioning

confidence: 99%

Electron Microscopy of the Volvocaceae and Astrephomenaceae

Lang¹

1963

American Journal of Botany

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JSTOR is a not-for-profit service that helps scholars, researchers, and students discover, use, and build upon a wide range of content in a trusted digital archive. We use information technology and tools to increase productivity and facilitate new forms of scholarship. For more information about JSTOR, please contact support@jstor.org. This content downloaded from 192.122.237.41 on Sun, A B S T R A C T LANG, NORMA J. (U. Texas, Austin.) Electron microscopy of the Volvocaceae and Astrephomenaceae. Amer. Jour. Bot. 50(3): 280-300. Illus. 1963.-Clonal cultures of Gonium sociale, G. pectorale, Pandorina morum, Eudorina elegans, Eudorina sp., Volvulina steinii, V. pringsheimii, Platydorina caudata, Pleodorina illinoisensis, P. californica, Volvox aureus, V. tertius, V. globator, V.barberi, and Astrephomene gubernaculifera representing the Volvocaceae and Astrephomenaceae in the Volvocales were examined with the electron microscope and their ultrastructure compared. The ultrastructure of the various organelles is basically similar in the species studied and no increase in cellular complexity is found to accompany the evolutionary trends evidenced in the Volvocaceae. The ultrastructure of a colonial cell is basically that of Chlamydomonas. A cytoplasmic membrane having a unit membrane structure encompasses a cell and is continuous with the double-membraned flagellar sheaths. The flagella contain the typical 9 + 2 fibril arrangement with the 2 axial fibrils terminating in a cylinder at the flagellar base and the 9 peripheral pairs continuing into the cytoplasm as a basal body. The organelles comprising the cytoplasm are: mitochondria with plate-like cristae; dictyosomes composed of stacks of agranular cisternae; small, rough or smooth-surfaced vesicles; an endoplasmic reticulum of granule-bearing and agranular tubules, lamellae and broad cisternae; vacuoles which are either contractile, contain fine granular and fibrillar material, or have dense contents probably representing polyphosphate; lipid bodies; and dense granules 100-150 A which have been called ribosomes. The finely granular nucleoplasm is surrounded by a porous, double-membraned nuclear envelope and contains a centric nucleolus composed of dense, spherical granules. The outer membrane of the nuclear envelope bears granules and may have granular extensions into the perinuclear cytoplasm. Each extension appears to encompass one or several dictyosomes and has been termed an "amplexus." The amplexi are agranular on the surface contiguous to a dictyosome. A double-membraned chloroplast envelope is continuous around the single, cup-shaped chloroplast. The basic chloroplast units are discs closed at each end, occurring in stacks of varying number parallel to the envelope. The presumed proteinaceous matrix of the basal pyrenoid is penetrated by elongated, tubular elements which connect with the lamellar discs. Multiple rows of granules, associated with individual discs, form the anterior stigma within the chloroplast envelope. The colonial matrix is not a structurel...

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“…b) Nitrat-Agar: 20 g Glucose, 25 mg CaCl,, 25 mg KH,PO,, 125 mg K,HPO,, 75 mg MgSO, x 7 H,O, 25 mg NaCl, 250 mg NaNO, und 1 ml Spurenelementlosung nach HOAOLAND (STARR 1960), 30 g Agar-Agar, aqua dest. auf 1000 ml.…”

Section: Materials Und Methodenunclassified

Einige Charakteristika Pyrophosphat‐spaltender Enzyme von Candida utilis

Jungnickel

1972

J of Basic Microbiology

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Bei Phosphatmangelzellen von Candida utilis wurden durch Thermoinaktivierung und Aciditätscharakteristik zwei strukturgebundene Pyrophosphat‐Phosphohydrolasen gekennzeichnet, die bei pH 2 bis pH 7 exogenes Pyrophosphat in Orthophosphat überführen. Das Aciditätsoptimum des Enzyms I liegt bei pH 2,5, das des Enzyms II bei pH 6; bei gemeinsamer Wirkung der Enzyme I und II liegt das Optimum bei pH 2,5. Das Enzym II ist bereits nach 10 min Vorbehandlung bei Temperaturen über 70 °C weitgehend, das Enzym I jedoch erst bei entsprechender Behandlung über 90 °C inaktiviert. Nach 10 min Vorbehandlung bei 62 °C sind beide Enzyme unvermindert aktiv und fest an die Zellen gebunden. Nach reichlichem Phosphatangebot ist in den Zellen eine nur sehr geringe Pyrophosphatspaltende Aktivität nachweisbar; Orthophosphat reprimiert offenbar die Synthese beider Enzyme.

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The Culture Collection of Algae at Indiana University

Cited by 438 publications

References 50 publications

Chytrids and Algae: I. Host–substrate Range, and Morphological Variation of Species of Rhizophydium

Chytrids and Algae: I. Host–substrate Range, and Morphological Variation of Species of Rhizophydium

Electron Microscopy of the Volvocaceae and Astrephomenaceae

Einige Charakteristika Pyrophosphat‐spaltender Enzyme von Candida utilis

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