摘要:

ABSTRACTParatrichophaea macrocystisis reported from North America, and two other previously described species are transferred to the genus from other genera. The new combinations areP. michiganensisandP. pygmea. Paratrichophaeais compared toTricharina, Wiicoxina, Trichophaeopsis, Rhizoblepharia, TrichophaeaandCheilymeniabut is considered to be distinct from them.

ISSN:0027-5514    

DOI:10.1080/00275514.1988.12025573

出版商:Taylor&Francis    

年代:1988

数据来源: Taylor

摘要:

ABSTRACTScutellospora dipurpurescens, sp. nov.(Endogonaceae) was discovered in several unmanaged pastures and a partially reclaimed surface coal mine in West Virginia. Spores are yellow to greenish-yellow with four walls. An outer finely laminate wall and a second hyaline membranous wall form the outer wall group. The inner wall group consists of a semi-rigid hyaline unit wall and an innermost hyaline amorphous wall. Both inner walls stain in Melzer's solution, a diagnostic feature of this species. The inner unit wall stains light pinkish-purple and the inner amorphous wall stains reddish to dark purple. This fungus forms mycorrhizae with arbuscules but not vesicles in fescue, sudangrass, and red clover grown in pot culture.

ISSN:0027-5514    

DOI:10.1080/00275514.1988.12025574

出版商:Taylor&Francis    

年代:1988

数据来源: Taylor

摘要:

ABSTRACTThere are two trophic states in the life history of the protostelidClastostelium recurvatum, an amoeboflagellate state which germinates from the spore and an obligately amoeboid state which develops from the amoeboflagellate and gives rise to the sporocarp. The amoeboflagellate has an overall morphology similar to the swarm cells of myxomycetes and the amoeboflagellates of the protostelidsProtosporangiumandCeratiomyxa.Its ultrastructure is nearly identical to that ofProtosporangium, and both share a similar cell coat and a flagellar apparatus with a reduced microtubule array-3 withCeratiomyxa.The obligate amoeba is usually uninculeate, has a prominent cell coat, and a paranuclear microtubule organizing center (MTOC) that consists of arrays of microtubules and single microtubules radiating from an electron dense core. The MTOC is very similar to that of the obligate amoeba ofProtosporangium.Based on the ultrastructure of the amoeboflagellates and obligate amoebae, it is concluded thatClastosteliumis very closely related toProtosporangium, and that these two genera form a sister group toCeratiomyxa.The group containing these three genera has several characters of the life cycle which correlate well with the ultrastructural data on the trophic cells and support them as a natural group. These three genera are the most myxomycete-like protostelids and probably represent a sister group to the myxomycetes.

ISSN:0027-5514    

DOI:10.1080/00275514.1988.12025575

出版商:Taylor&Francis    

年代:1988

数据来源: Taylor

摘要:

ABSTRACTUntil recently,Cribraria minutissimawas broadly described as having sporangia with or without a peridial cup (calyculus). The cupless form was recently given the nameCribraria confusa.Study of type specimens, specimens collected from different geographical areas, and scanning electron micrographs of sporangia support recognition of two distinct taxa.Cribraria minutissimais recognized by cupped sporangia, thickened, smooth upper rim of the cup sharply delimiting it from the peridial net, peridial net devoid of dictydine granules, reddish-orange spore mass, and spore ornamentation of obtuse spines. Surface ornamentation of the cup appears as rounded spherules (dictydine or plasmodic granules) shown with SEM, which often collapse, producing concavities.Cribraria confusadiffers fromC. minutissimain lack of peridial cup, bright yellow spore mass, smaller sporangia, and spores that bear sharply pointed spines and collapse along preformed lines. In some sporangia a basal disk may be present, or when absent, replaced by basal peridial strands. This disk could not be correlated with other characteristics.Cribraria confusais the smallest known taxon in the genusCribraria.

ISSN:0027-5514    

DOI:10.1080/00275514.1988.12025576

出版商:Taylor&Francis    

年代:1988

数据来源: Taylor

摘要:

ABSTRACTScytinostroma galactinumis a species complex and contains two inter-incompatible species with similar basidiocarp and cultural morphology. The two species can be distinguished by substrate and isozyme analysis.Scytinostroma galactinumoccurs on woody gymnosperms and occasionally on angiosperms throughout North America.Scytinostromaprotrusum, comb, nov., is found on angiospermous wood. Two subspecies of S.protrusumare recognized based on physiological and distributional data.Scytinostroma protrusumsubsp.septentrionale, subsp. nov., occurs primarily in the northern United States and is less tolerant of gallic acid than S.protrusumsubsp.protrusum, which occurs in the southern United States. Basidiocarp and cultural descriptions ofS. galactinumare provided.Scytinostroma protrusumis tetrapolar and multiallelic at the mating type locus.

ISSN:0027-5514    

DOI:10.1080/00275514.1988.12025577

出版商:Taylor&Francis    

年代:1988

数据来源: Taylor

摘要:

ABSTRACTA homokaryotic fruiting strain of a red pigmented yeast in the genusRhodosporidiumwas isolated from brackish waters of the Miami River. Using molecular techniques,viz., determination of the guanine + cytosine contents of the nuclear DNA and extent of DNA hybridizations, the strain was compared with taxonomically similar species inRhodotorula, RhodosporidiumandSporidiobolus.On the basis of these results, a new species,Rhodosporidium fluviale, is described.

ISSN:0027-5514    

DOI:10.1080/00275514.1988.12025578

出版商:Taylor&Francis    

年代:1988

数据来源: Taylor

ISSN:0027-5514    

DOI:10.1080/00275514.1988.12025579

出版商:Taylor&Francis    

年代:1988

数据来源: Taylor

ISSN:0027-5514    

DOI:10.1080/00275514.1988.12025580

出版商:Taylor&Francis    

年代:1988

数据来源: Taylor

ISSN:0027-5514    

DOI:10.1080/00275514.1988.12025581

出版商:Taylor&Francis    

年代:1988

数据来源: Taylor

ISSN:0027-5514    

DOI:10.1080/00275514.1988.12025582

出版商:Taylor&Francis    

年代:1988

数据来源: Taylor