ISSN:0027-5514    

DOI:10.1080/00275514.1960.12024941

出版商:Taylor&Francis    

年代:1960

数据来源: Taylor

摘要:

SUMMARY1.Hyphal fragments were present in Kansas in the air throughout the year with highest numbers during growing seasons.2.Numbers in winters varied from 1 to 6, in summers from 5 to 51 per cubic foot.3.Fragments varied in size and length, mostly from 5 to 15μ, occasionally to 100μ. The majority were brown septate thick-walled but hyaline fragments were also present.4.Viability ranged from 29 to 82%. Preliminary isolations produced colonies ofCladosporium, Alternaria, andPenicillium.5.The abundance of viable fungal fragments suggests that this may be an important means of asexual reproduction.

ISSN:0027-5514    

DOI:10.1080/00275514.1960.12024942

出版商:Taylor&Francis    

年代:1960

数据来源: Taylor

ISSN:0027-5514    

DOI:10.1080/00275514.1960.12024943

出版商:Taylor&Francis    

年代:1960

数据来源: Taylor

摘要:

SUMMARYThe description ofEmericellopsis synnematicola, a new species withStilbella-type of conidial stage, is given. AllEmericellopsisspecies, previously known, have only theCephalosporiumtype of conidia.

ISSN:0027-5514    

DOI:10.1080/00275514.1960.12024944

出版商:Taylor&Francis    

年代:1960

数据来源: Taylor

ISSN:0027-5514    

DOI:10.1080/00275514.1960.12024945

出版商:Taylor&Francis    

年代:1960

数据来源: Taylor

摘要:

SUMMARYAscospores ofUrnula crateriumwere subjected to various environments to determine their effect on germination. Percentage germination and length of germ tube were used to determine the response. Ascospores germinated over a wide temperature range, including 5°and 35°C. The optimum, based on germ tube elongation and percentage germination 16 hours after expulsion from the apothecium, was 20–30°C. Germination of some spores occurred at 35°, but the protoplasm was extruded from both germ tubes and ungerminated spores. There was no subsequent growth. Added nutrients increased germination, but 85% of the ascospores germinated without them. There was no subsequent growth, however. Growth from germinated ascospores was excellent on malt extract agar and Barnett's agar; the optimum for continued growth was 24–27°. C. Ascospores germinated over a range of pH from 2.5 to 9.5; the optimum was 5.3 for germination and germ tube elongation. Light had no effect on germination, but it affected longevity. Germination of ascospores stored 383 days at 20–25°C was 10% for storage in light and 40% for storage in dark. The ascospores germinate in less than 2 hours and germ tube elongation is rapid at optimum temperatures.

ISSN:0027-5514    

DOI:10.1080/00275514.1960.12024946

出版商:Taylor&Francis    

年代:1960

数据来源: Taylor

摘要:

SUMMARYCallus cultures from corms ofArisaema triphyllumsystemically infected withUromyces ari-triphylliwere maintained for several years by subdivision and transfer. The rust has produced aecia upon these calluses. Five strains have been isolated and grown in axenic culture. These isolated strains have been maintained on synthetic media and all were capable of reinfectingArisaemain tissue culture and under field conditions and of forming characteristic sori with viable spores on the inoculated hosts.

ISSN:0027-5514    

DOI:10.1080/00275514.1960.12024947

出版商:Taylor&Francis    

年代:1960

数据来源: Taylor

摘要:

SUMMARYThree new species ofEnterobryus(Eccrinales) are described that inhabit the hindguts of three millipeds from southeastern United States. They areE. dixidesmiinDixidesmus tallulanusChamberlin,E. cherokiaeinCherokia georgiana(Bollman), andE. ahlesiinApheloria montana(Bollman).

ISSN:0027-5514    

DOI:10.1080/00275514.1960.12024948

出版商:Taylor&Francis    

年代:1960

数据来源: Taylor

摘要:

SUMMARYOf 8124 attempted interspecific crosses between 174 isolates of 16 species ofHelminthosporiumexhibiting bipolar germination, 47 produced viable ascospores and 24 produced sterile asci. The 16 species were placed into 5 morphology classes, based on relative shape and size of conidia. Forty-six of 2707 attempted crosses between species with similar conidial morphology were fertile, while 25 of 5417 crosses between species with different morphology were fertile. Although species in the Fungi Imperfecti are considered to be classified without“natural”criteria and merely as a matter of convenience, the frequency of cross fertility between species with a similar or different conidial morphology indicates that genetic similarities exist between related conidial forms.

ISSN:0027-5514    

DOI:10.1080/00275514.1960.12024949

出版商:Taylor&Francis    

年代:1960

数据来源: Taylor

摘要:

SUMMARY1.Representative lyophil cultures of the Mucorales, Entomophthorales, Ascomycetes, Fungi Imperfecti and Actinomycetes, the majority being 17 years old, were opened. Of the 363 cultures tested, 331 were viable. Seventeen of those not viable did not contain spores.2.Morphological characteristics remained constant during lyophilization and, in a few exceptions where differences occurred, they were better than those periodically transferred.3.Of the 199 cultures of Mucorales preserved by the oil overlay method for more than 11 years, 79 were viable.4.Of the 241 cultures of Mucorales preserved on malt agar slants for more than 9 years, 45 were viable.

ISSN:0027-5514    

DOI:10.1080/00275514.1960.12024950

出版商:Taylor&Francis    

年代:1960

数据来源: Taylor