摘要:

SUMMARYTwo biotrophic parasites (Calcarisporium parasiticumandGonato-botrys simplex) are deficient for a growth factor, which they must absorb from living host cells or from the substrate to which this nutrient has been added. While the absence of the growth factor from a given fungus would result in immunity, its presence in a fungus does not necessarily result in susceptibility. The ability of these two mycoparasites to absorb the required nutrient from living host cells, probably by altering the permeability of the cell membrane, appears to be the basic factor underlying their successful parasitism.This theory would help to explain only one mode of parasitism and is not applicable to all parasites of this type. It is expected that other mycoparasites, possibly the haustorium-producing phycomycetes, will be found to be deficient for one or more nutrients, which they normally absorb from the living host cells. For the vast number of facts needed to answer these many questions we must turn to the biochemist or the fungus physiologist well founded in biochemistry and encourage them to investigate these basic problems.These are among the most challenging and most fascinating problems in biology. Progress will be slow and, with the almost unlimited supply of test fungi, it will be many years before our information will permit us to establish clearly the basic principles of mycoparasitism.

ISSN:0027-5514    

DOI:10.1080/00275514.1964.12018078

出版商:Taylor&Francis    

年代:1964

数据来源: Taylor

ISSN:0027-5514    

DOI:10.1080/00275514.1964.12018079

出版商:Taylor&Francis    

年代:1964

数据来源: Taylor

摘要:

SUMMARYThe Fungi Imperfecti obtained from the phanerogamic collections of several collectors, from Kashmir and the Punjab, which are deposited in the Herbarium of the University of Michigan, are described and discussed. Twenty-seven species are described as new.

ISSN:0027-5514    

DOI:10.1080/00275514.1964.12018080

出版商:Taylor&Francis    

年代:1964

数据来源: Taylor

ISSN:0027-5514    

DOI:10.1080/00275514.1964.12018081

出版商:Taylor&Francis    

年代:1964

数据来源: Taylor

摘要:

SUMMARYDuring investigations on fungal contamination of starch products in the Kharkiv (Ukraine), it was established that incidence of contamination was very high due to the use of frozen and partially spoiled potatoes for the production of starch. Many of the fungi isolated from the starch were typical soil fungi. Four new species of fungi isolated from the starch are described.

ISSN:0027-5514    

DOI:10.1080/00275514.1964.12018082

出版商:Taylor&Francis    

年代:1964

数据来源: Taylor

ISSN:0027-5514    

DOI:10.1080/00275514.1964.12018083

出版商:Taylor&Francis    

年代:1964

数据来源: Taylor

ISSN:0027-5514    

DOI:10.1080/00275514.1964.12018084

出版商:Taylor&Francis    

年代:1964

数据来源: Taylor

摘要:

SUMMARYTaxonomically the lignicolous Sordariaceae have been a neglected group. Here we describe one new genus, eight new species, and three new combinations. New features of peridium, ascus, and ascospore morphology are pointed out, and these are shown to fit in with the previously recognized pattern of variation in the Sordariaceae. Evidence is presented in support of a Sordariacean origin of the Coronophorales.

ISSN:0027-5514    

DOI:10.1080/00275514.1964.12018085

出版商:Taylor&Francis    

年代:1964

数据来源: Taylor

摘要:

SUMMARYA. spinosavar.biappendiculata, a new variety ofAbsidiaisolated from leaves ofComandra pallidaA. DC., is described. It is characterized by cylindrical spores and zygospores surrounded by appendages borne from each of the equal suspensors.

ISSN:0027-5514    

DOI:10.1080/00275514.1964.12018086

出版商:Taylor&Francis    

年代:1964

数据来源: Taylor

ISSN:0027-5514    

DOI:10.1080/00275514.1964.12018087

出版商:Taylor&Francis    

年代:1964

数据来源: Taylor