ISSN:0027-5514    

DOI:10.1080/00275514.1988.12025587

出版商:Taylor&Francis    

年代:1988

数据来源: Taylor

ISSN:0027-5514    

DOI:10.1080/00275514.1988.12025588

出版商:Taylor&Francis    

年代:1988

数据来源: Taylor

ISSN:0027-5514    

DOI:10.1080/00275514.1988.12025589

出版商:Taylor&Francis    

年代:1988

数据来源: Taylor

ISSN:0027-5514    

DOI:10.1080/00275514.1988.12025590

出版商:Taylor&Francis    

年代:1988

数据来源: Taylor

摘要:

ABSTRACTThe status of the species namesMeripilus giganteus, Grifola lentifrondosa, andG. sumstineiis reviewed with regard to synonymy. Data from studies of nomenclatural types by light and scanning electron microscopy indicate that they represent three distinct species. Data from studies of cultures ofM. giganteusandG. sumstineialso indicate that these two names represent separate taxa.Meripilus giganteusandG. sumstineiare typified. The new combinations,Meripilus sumstineiandMeripilus lentifrondosa, are proposed. We conclude thatM. giganteusdoes not occur in North America. A key to the species ofMeripilusis provided, and pathogenicity and edibility ofM. giganteusandM. sumstineiare discussed.

ISSN:0027-5514    

DOI:10.1080/00275514.1988.12025591

出版商:Taylor&Francis    

年代:1988

数据来源: Taylor

摘要:

ABSTRACTThe relative proportions of various lipid classes and the fatty acid composition of extramatrical structures (azygospores and auxiliary cells) ofGigaspora margaritaand intramatrical structures ofGlomus intraradices(spores),G. versiforme(vesicles) andG. vesiculiferum(vesicles) were measured. The most abundant lipid classes in all structures, except in auxiliary cells, were triacylglycerides followed by free fatty acids. In auxiliary cells ofG. margarita, free fatty acids were the principal lipid class followed by the triacylglycerides. Glycolipids were detected, in minor quantities, only in azygospores ofG. margaritaand intramatrical spores ofG. intraradices.There were qualitative and quantitative differences in the fatty acid composition among all VAM structures. The predominant fatty acids in extramatrical structures ofG. margaritawere 18:1 and 16:0, while in the threeGlomusspecies they were 16:1 and 16:0. Both isomers of linolenic acid (18:3Δ6, 9, 12and 18:3Δ9, 12, 15) and nonadecanoic acid (19:0) were present in all structures analysed. In addition, variousω3 andω6 polyunsaturates were found in different VAM structures. These patterns suggest that VAM fungi have closer links with protoctistan fungi than with Zygomycetes.

ISSN:0027-5514    

DOI:10.1080/00275514.1988.12025592

出版商:Taylor&Francis    

年代:1988

数据来源: Taylor

摘要:

ABSTRACTThe ultrastructure of the flagellar apparatus ofSemimorula liquescenswas determined using serial section analysis to assess the taxonomic position of this species within the Eumycetozoa. There is not a close association between the flagellar apparatus and nucleus. One of the flagellar components is the anterior, posterior and procentriolar complex. The anterior centriole gives rise to the single, anterior whiplash flagellum. A para-kinetosomal structure associated with the posterior centriole is attached to a non-striated connective that wraps around the anterior centriole. Each flagellar apparatus contains microtubule arrays 1–5. A convoluted, shelf-like MTOC is attached to the anterior centriole. Because the flagellar apparatus ofS. liquescensis basically identical to that of the Myxomycetes, an affinity with this group of Eumycetozoa is evidenced.

ISSN:0027-5514    

DOI:10.1080/00275514.1988.12025593

出版商:Taylor&Francis    

年代:1988

数据来源: Taylor

摘要:

ABSTRACTMorphological changes and nuclear behavior during ascospore ontogeny in a collection ofScoleconectria cucurbitulawith two-spored asci were characterized, and asexual states observed in artificial culture. Following meiosis, two single-celled, uninucleate ascospores were formed within the developing ascus; the other two post-meiotic nuclei did not take part in ascospore development. Ascospores progressed through two-celled, four-celled, and multi-celled stages, finally becoming highly elongate and transversely septate, with numerous uninucleate cells. While within the ascus, ascospore cells differentiated into phialides and produced numerous conidia. Synanamorphs formed in culture included a phialidic hyphomycetous state, a pycnidial state, and a state producing spores within hyphal cells by a process resembling free cell formation. It is suggested that intra-ascal germination obviates the need for greater numbers of ascospores, and that the two-spored form ofS. cucurbitulalikely arose from the four-spored form. Intra-ascal germination appears correlated with loss of ascus rings and possibly with loss of forcible spore discharge in certainNectriaspecies. The possible role of heterochrony in the evolution of phialidic ascospore germination inS. cucurbitulaand allied fungi is discussed.

ISSN:0027-5514    

DOI:10.1080/00275514.1988.12025594

出版商:Taylor&Francis    

年代:1988

数据来源: Taylor

摘要:

ABSTRACTA one year study of an artesian well, associated with the Edwards Aquifer in south-central Texas, revealed substantial fungal populations. The mycoflora from this aphotic community was identified from 4 sources: groundwater samples, introduced organic baits, emerging phreatic organisms and particulate organic matter. The fungal flora included 12 genera of Hyphomycetes, 6 Coelomycetes, 1 Ascomycete, 4 Zygomycetes, and 2 Oomycetes. Presence of fungal organisms within this system, and their subsequent heterotrophic activity may provide answers as to energy conversions within this cavernous groundwater ecosystem. This fungal activity, we believe, enhances the detrital food chain which supports the diverse groundwater animal populations indigenous to this aquifer system.

ISSN:0027-5514    

DOI:10.1080/00275514.1988.12025595

出版商:Taylor&Francis    

年代:1988

数据来源: Taylor

摘要:

ABSTRACTMonilinia gaylussaciae sp. nov.(Discomycetidae: Sclerotiniaceae) is sympatric with several other species such asM. vaccinii-corymbosi, M. polycodii, andM. azaleae, which also parasitize ericaceous hosts endemic to North America. It is generally restricted toGaylussacia(Huckleberry). In contrast to the species onVaccinium, the mummified fruit of the new species remain attached to the host until late summer, and the pseudosclerotium within matures on the bush. The apothecia develop from pseudosclerotia on the ground, formed the previous year, and mature in late March through April. Asci are octosporic and stain blue in Melzer's iodine reagent; ascospores are 13.0-15.1×7.5-8.6μm, ellipsoid, subhyaline and smooth; conidia are formed on very tender foliage of the current year, are ash gray limoniform, 26–31×20–23μm and are separated by fusiform disjunctors 8–10×2–2.5μm. Cultures ofM. gaylussaciaeon potato dextrose and yeast-malt agar media are zonate, without micro-conidia and produce a copious amount of a yellow crystalline material in the agar and black stromata arranged concentrically.

ISSN:0027-5514    

DOI:10.1080/00275514.1988.12025596

出版商:Taylor&Francis    

年代:1988

数据来源: Taylor