Oscillatoria agardhii var. suspensa nov. var.

Zusammenfassung Oscillatoria agardhii var. suspensa n. var. ist ein Süßwasser-Planktont, der O. agardhii nahe steht, sich aber durch geringere Abmessungen und den Bau der Trichom-Enden unterscheidet. Sie wurde durch Waschen von anderen Organismen befreit, was bisher noch bei keiner Cyanophycee gelungen war.Die Art lebt im Wasser schwebend. Nur in alten Kulturen sammelt sie sich an der Oberfläche an. O. agardhii var. suspensa ist streng photo-autotroph und macht von organischen Nährstoffen keinen Gebrauch. Sie ist sogar sehr empfindlich gegen manche von ihnen, besonders gegen Glucose (aber nicht gegen andere Zucker), die schon in geringen Konzentrationen die Vermehrung unterdrückt.Die weißlich-grüne Farbe der Art wird durch die Pseudovacuolen bewirkt; der Chlorophyllgehalt ist aber nicht geringer als der von anderen Cyanophyceen, die tief blaugrün aussehen.

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Summary Oscillatoria agardhii var. suspensa n. var. is a freshwater planktont allied to O. agardhii but differing in smaller dimensions and the shape of the trichome-ends. It was freed from other organisms by the washing procedure, a technique that had not yet been successful in any member of the Cyanophyceae.The organism lives suspended in the water except in old cultures when it tends to accumulate near the surface. O. agardhii var. suspensa is strictly photo-autotrophic not utilizing any organic nutrients and even to some of them very sensitive, particularly to glucose (though not to other sugars) which prevents growth at minute concentrations.The whitish green hue of the species is due to pseudovacuoles while the content of chlorophyll is not lower than that of Cyanophycean species appearing deep blue-green to the eye.

     

Staurastrum dilatatum var.thomassonii var. nov.

The new varietyStaurastrum dilatatum Ehr. var.thomassonii is described and illustrated.     

Streptococcus faecium var. casselifavus, nov. var

Streptococcus faecium var. casseliflavus is a gram-positive, spherical cell. The cells occur chiefly as pairs within chains and elongate to ogive-shaped cells during growth. Growth is good on 5% bile salts-agar and in broth at 10 C, and in broth adjusted to pH 9.6 or containing 6.5% NaCl, but many strains fail to grow at 45 C. Litmus is reduced rapidly prior to formation of an acid curd. Few strains release ammonia from arginine or serine. The organism is not proteolytic and does not produce H(2)S or acetylmethylcarbinol, reduce nitrate, decarboxylate tyrosine, or produce slime on sucrose-agar. Most strains survive heating to 60 C for 30 min. It produces gray colonies on potassium tellurite agar, reduces 2,3,5-triphenyltetrazolium-HCl to a pink color, and ferments cellobiose, dextrin, maltose, mannose, and sorbitol, thus resembling S. faecalis. Like S. faecium, it produces peroxidase but not catalase on heated blood media, dissimilates malate, and ferments arabinose, melibiose, and salicin, but not melezitose. Like both species, it ferments dextrose, galactose, lactose, mannitol, sucrose, trehalose, and citrate. Properties peculiar to the variant include the high pH limiting initiation and termination of growth; the fermentation of alpha-methyl-d-glucoside, raffinose, and xylose; motility; and growth without blue button formation in ethyl violet broth. The water-soluble, pale lemon-yellow pigment is released into the aqueous phase only after the cell envelope is altered by fat solvents. The bacterium thrives as an epiphyte on plants.     

Über die BasidiolicheneLentaria mucida var.hexaspora n. var.

Ohne Zusammenfassung     

Morphological variability of the diatom Cyclotella atomus Hustedt var. atomus and C. atomus var. gracilis var. nov.

Cyclotella atomus collected from different rivers, reservoirs and lakes shows considerable morphological variability. On the basis of electronmicroscopic (EM) study, we propose Cyclotella atomus var. gracilis Genkal et Kiss as a new variety of this species. Cyclotella atomus var. atomus has short and long radial striae, which are irregularly arranged on the same valve, and the alveolar chambers are not clearly divided from the central, hyaline part of the valve face. In addition to the described basic form, several specimens with other features have also been found and are thought to belong to an undescribed variety. The striae of the new variety are equal in length, and the alveolar chambers are clearly divided from the hyaline central area of the valve face by a curved structure.There are EM micrographs on Cyclotella atomus var. gracilis under different names in different papers. The new variety has several characteristics also found in other species, e.g. Cyclotella caspia Grun., or C. meneghiniana Kütz.     

Pinus nigra Arn. var.gočensis,n. var.

Ohne Zusammenfassung     

Der Generationswechsel von Rotalia beccarii var. flevensis,nov. var

Zusammenfassung Rotalia beccarii var. flevensis nov. var. zeigt eine typische Trimorphie (Formen a₁, A₂ und B). Diese Trimorphie ist der Ausdruck eines Generationswechsels, der mit den Jahreszeiten gleichen Tritt hält. Die B-Form ist die Dauerform im Winter und bildet im Frühjahr durch asexuelle Vermehrung Plasmodiosporen, welche zur A₁-Form heranwachsen. Die A₁-Form bildet ihrerseits im Sommer die A₂-Form, welche gekennzeichnet ist durch den Besitz eines Chromidiums. In dieser Form entwickeln sich die Mikrosporen durch mitotische Teilungen der aus dem Chromidium entstandenen kleinen Kerne, nachdem die Individuen sich enzystiert haben. Die Kopulation der Mikrosporen liefert im Herbst wieder die mikrosphärische B-Form.Ich habe eine ausführliche Studie publiziert über die Fortpflanzung der Foraminiferen in: Siboga-Reports 4, Part II, S. 79–104. Daselbst ist diese Rotalia noch als Pulvinulina repanda angeführt. Für Figuren verweise ich auf diese Arbeit.Mitteilung der Kommission zur biologischen Untersuchung der Zuidersee während der Trockenlegung.     

Palynological study of Cupressus sempervirens L. var. pyramidalis and var. horizontalis

ABSTRACT

Cupressus sempervirens L. var. pyramidalis and C. sempervirens var. horizontalis were examined for their pollen morphometry and ultrastructure to verify whether, in addition to phenotype, pollen could also show characteristics useful to discriminate the two infraspecific taxa. C. sempervirens var. pyramidalis compared to C. sempervirens var. horizontalis has mainly larger, subcircular pollen with a higher percentage of apolar and germinating grains, and a wall with thicker intine; the cytoplasm has a greater number of callose-containing vesicles. C. sempervirens var. horizontalis has pollen distributed in five classes of shape. In addition it is smaller and shows a higher percentage of ruptured grains, and a lower percentage of germination in vitro. The cytoplasm contains vesicles rich in callose and also a higher amount of osmophilic bodies. Pollen grains in both varietas contain only one cell at dispersal. The reported differences in pollen morphometry, structure and biology, together with the phenotypic characteristics of the tree, support the validity of two infraspecific taxa.     

Mallomonas corymbosa var. interrupta nov. var. (Synurophyceae) from Argentina

A new variety of Mallomonas corymbosa is described from a pond in Nahuel-Huapi National Park (Argentina): M. corymbosa var. interrupt nov. var. Fine structure of scales and bristles has been studied by scanning and transmission electron microscopy.     

Colletotrichum acutatum var. fioriniae (teleomorph: Glomerella acutata var. fioriniae var. nov.) infection of a scale insect

An epizootic has been reported in Fiorinia externa populations in New York, Connecticut, Pennsylvania and NewJersey. Infected insects have profuse sclerotial masses enclosing their bodies. The most commonly isolated microorganism from infected F. externa was Colletotrichum sp. A morphological and molecular characterization of this fungus indicated that it is closely related to phytopathogenic C. acutatum isolates. Isolates of Colletotrichum sp. from F. externa in areas of the epizootic were similar genetically and were named Colletotrichum acutatum var. fioriniae var. nov, based on our findings. In vitro and in planta mating observed between isolates of C. acutatum var. fioriniae could serve as a possible source of genetic variation and might give rise to new biotypes with a propensity to infect insects. Only one other strain, C. gloeosporioides f. sp. ortheziidae, has been reported to show entomopathogenic activity.     

Magnolia denudata var. glabrata var. nov. (Magnoliaceae) from Hunan,China

Magnolia denudata var. glabrata Y. L. Wang et S. Z. Zhang var. nov. is described and illustrated from Hunan, China. The variety occurs mainly in semi‐evergreen forest of south Hunan at altitudes between 700 and 1260 m a.s.l. It differs from M. denudata var. denudata by its green and glabrous twigs and leaves which are glabrous above and have some white pubescence underneath. With its white flowers consisting of mostly 9 tepals, it differs from M. sprengeri Pamp. which mainly has 12 tepals in various shades of red/pink to white. The new variety is rare and considered endangered due to habitat destruction.     

Cryptococcus antarcticus var. circumpolaris var. nov., a basidiomycetous yeast from Antarctica

Cryptococcus antarcticus Vishniac & Kurtzman var. circumpolaris Vishniac and Onofri var. nov. (Filobasidiales, Tremellomycetidae, Hymenomycetes), an anamorphic yeast with ca. 73% nDNA relatedness to Cryptococcus antarcticus var.antarcticus, differs in failure to assimilate raffinose, a lower maximum temperature for growth, fatty acid profile, and in a single nucleotide change in the D2 region of LSU rDNA. This revised version was published online in June 2006 with corrections to the Cover Date.     

Alectra parasitica var. chitrakutensis

Alectra parasitica is a drug plant, indigenous to India, which had been used in the treatment of leprosy for centuries in traditional ayurvedic medical practice, remaining strictly confined to a limited area. Onlysadhus and mendicants practiced with it, and it has not been known sufficiently to practitioners of indigenous medicine in other parts of the country. Even the existence of this plant in India had not been recorded by botanists until recently. Preliminary clinical trials of the drug in the treatment of teprosy were carried out by Prasad in Patna, Bihar (India), in 1962. In view of the encouraging results obtained, an on-the-spot study of its availability, collection, drying, etc., was made. Properties and uses of the drug as known to local people were also recorded. It is felt that this may prove to be a medicinal plant of economic importance.     

Struthiopteris germanica var. imperfecta

Ohne Zusammenfassung