ISSN:0027-5514    

DOI:10.1080/00275514.1944.12017706

出版商:Taylor&Francis    

年代:1948

数据来源: Taylor

ISSN:0027-5514    

DOI:10.1080/00275514.1944.12017707

出版商:Taylor&Francis    

年代:1948

数据来源: Taylor

ISSN:0027-5514    

DOI:10.1080/00275514.1944.12017708

出版商:Taylor&Francis    

年代:1948

数据来源: Taylor

摘要:

SUMMARYRhizophydium nodulosumsp. nov. is a keratinophilic saprophyte which was isolated from frozen muck soil and freshwater from Van Cortlandt Park, New York City. It grows readily on keratinized substrata such as hair and skin but not on chitin, cellulose, or various types of nutrient agar media. It is characterized structurally by hyaline, smooth, nodular and angular zoosporangia with several prominent exit papillae which give the sporangia their typical shape and appearance. Resting spores are unknown.Its sporangia may become heavily parasitized by another small chytrid which is characterized by elongately citriforn, obpyriform, oval or elongate, operculate sporangia and minute branched or un-branched rhizoids. The resting spores of the parasite are unknown so that it is not certain whether this chytrid is a species ofChytridiumorChytriomyces.Nevertheless, it is included provisionally inChytridiumand namedChytridium Rhizophydii.

ISSN:0027-5514    

DOI:10.1080/00275514.1944.12017709

出版商:Taylor&Francis    

年代:1948

数据来源: Taylor

摘要:

SUMMARYA new species ofAchlya, A. crenulata, is described. It differs primarily from other eccentric species ofAchlyain that its spherical oogonia are covered with blunt crenulate projections. The fungus was grown in several media: 0.05% haemoglobin with 0.2% potassium phosphate gave the best vegetative growth. A solution of 0.05% leucin with 0.1% calcium, phosphate restricted the vegetative growth but after 120 hours in fresh water antheridia were more profusely formed than in any other solution.

ISSN:0027-5514    

DOI:10.1080/00275514.1944.12017710

出版商:Taylor&Francis    

年代:1948

数据来源: Taylor

ISSN:0027-5514    

DOI:10.1080/00275514.1944.12017711

出版商:Taylor&Francis    

年代:1948

数据来源: Taylor

摘要:

SUMMARYThe phycomycete,Mucor racemosus, possesses antibiotic prop-perties for certain bacteria. The active antibiotic principle is thermostable and is restricted to the minus strain of the heterothallic fungus for the bacteria tested.

ISSN:0027-5514    

DOI:10.1080/00275514.1944.12017712

出版商:Taylor&Francis    

年代:1948

数据来源: Taylor

ISSN:0027-5514    

DOI:10.1080/00275514.1944.12017713

出版商:Taylor&Francis    

年代:1948

数据来源: Taylor

摘要:

SUMMARYThe mold previously known asMetarrhizium glutinosumPope has recently been shown to be identical with the well-established speciesMyrothecium verrucaria(Alb.&Schw.) Ditm. ex Fr. A strain of“Metarrhizium glutinosum,”previously shown to produce, in the course of its metabolism, two biologically active substances, one highly fungistatic (glutinosin) and the other causing severe dermatitis, has been compared with several strains ofMyrothecium verrucaria, Myrothecium roridum, andMyrothecium inundatum.The strains ofMyrothecium verrucariaandMyrothecium roridumbehaved similarly, all producing a fungistatic substance (not yet shown to be chemically identical with glutinosin) and all except one strain ofMyrothecium roridumproducing the dermatitic substance. This result emphasizes the very close relationship betweenMyrothecium roridumandMyrothecium verrucaria.A single strain ofMyrothecium inundatumexamined did not produce either the fungistatic or the dermatitic substance.

ISSN:0027-5514    

DOI:10.1080/00275514.1944.12017714

出版商:Taylor&Francis    

年代:1948

数据来源: Taylor

摘要:

SUMMARYBy means of two-membered pure cultures the pathogenic fungi,Trichophyton rubrumandCandida albicans, have been shown to exert antagonistic effects on one anotherin vitro.The effects observed were (1) inhibition of growth (marked inhibition ofT. rubrumby a heat-labile metabolic product ofCandida), (2) the production of a yellow-brown color byT. rubrumin the two-membered cultures as a result of acid production byCandida(the pigment ofT. rubrumis a pH indicator), (3) complete inhibition of mycelial production byC. albicans.The latter phenomenon was studied in some detail. Two metabolic products ofT. rubrumwere shown to inhibit the yeast to mycelial conversion (designated asY→M). These products were: (1) soluble in water and in acetone, heat stable, adsorbed by Norite and eluted from it by dilute aqueous acid alcohol, (2) soluble in water, insoluble in acetone, heat labile, not adsorbed by Norite.Conversion ofY→Mwas independent of pH (4.5-8.0), but was inhibited regularly by high concentrations of NH4Cl (3 per cent). It was concluded the active fractions ofT. rubrumfiltrates were not the H+or NH4+ions.The general phenomenon of inhibition of cell division without simultaneous inhibition of growth (resulting in the production of elongated cells) is discussed in some detail. The possibility of inhibition or inactivation of a single enzyme complex responsible for cell division is briefly considered.

ISSN:0027-5514    

DOI:10.1080/00275514.1944.12017715

出版商:Taylor&Francis    

年代:1948

数据来源: Taylor