摘要:

SUMMARYThe taxonomy ofDiaporthe cubensis, causal agent of a canker disease ofEucalyptusspp., is discussed in relation to its conspecificity withEndothia havanensisand correct generic affinity. It was concluded that the fungus should be transferred toCryphonectria.

ISSN:0027-5514    

DOI:10.1080/00275514.1980.12021216

出版商:Taylor&Francis    

年代:1980

数据来源: Taylor

摘要:

SUMMARYThe ultrastructure of microbodies in zoospores, hyphae and developing sporangia was studied inMonoblepharellasp. Catalase activity in these organelles was demonstrated with the diaminobenzidine cytochemical technique. In zoospores elongate microbodies lay adjacent to lipid globules, ribosomal aggregations, and rumposomes. Hyphal microbodies varied in morphology and were either oval, elongate, reticulate or ring shaped. Microbodies in developing sporangia were elongate, branched and closely appressed to lipid globules. This study supports the validity of the microbody-lipid-globule complex as a possible phylogenetic marker in Chytridiomyoetes.

ISSN:0027-5514    

DOI:10.1080/00275514.1980.12021217

出版商:Taylor&Francis    

年代:1980

数据来源: Taylor

摘要:

SUMMARYPilobolus crystallinusutilized several carbon sources with sodium acetate giving the best growth. Maltose, palmitic acid, lactose and glucose supported moderate growth, whereas sucrose, starch and five other carbon sources supported relatively poor growth. Formic acid and oxalic acid were not utilized. The nitrogen sources glutamine and asparagine gave the highest mycelial yields. Glutamic acid and aspartic acid were better sources of nitrogen than potassium nitrate and urea. Ammonium sulphate at 1.6 g N/liter was inferior to glutamine and asparagine as a nitrogen source but it gave better mycelial yields at 0.14 g N/liter. Extracts made from cow dung of various ages did not stimulate growth.

ISSN:0027-5514    

DOI:10.1080/00275514.1980.12021218

出版商:Taylor&Francis    

年代:1980

数据来源: Taylor

摘要:

SUMMARYThe genusEichleriellais defined to include those tremellaceous species forming a basidiocarp with an abrupt to reflexed margin, a smooth hymenium or with fertile pegs or spines, a basal layer of thick-walled, brownish hyphae, and a vinaceous tint upon drying. The species ofEichleriellaknown from the USSR are described and illustrated.Eichleriella alliciens, which is defined to includeE. incarnata, is shown to occur in the Far Eastern Region (i.e., Khabarovskiy Kray and Primorskiy Kray). Several collections ofE. leucophaea, which is redefined to includeE. schrenkii, are described from Tadzhikistan and Turkmenistan (i.e., Tadshikskaya S.S.R. and Turkmen S.S.R.).Eichleriella deglubens, which is tentatively included in the genus, is evidently widely distributed throughout the USSR. The species ofEichleriellain the USSR are known to occur only on decaying angiosperm wood.

ISSN:0027-5514    

DOI:10.1080/00275514.1980.12021219

出版商:Taylor&Francis    

年代:1980

数据来源: Taylor

摘要:

SUMMARYTryptophol (TOL) and indolelactic acid (ILA) were synthesized by isolates ofCryptococcus neoformansin a synthetic medium containing tryptophan as the sole nitrogen source. The compounds were produced in maximal amounts at 48 to 72 h of growth at 37 C. Trace amounts of indolepyruvic acid (IPA) were found in acidic extracts, indicating that IPA is an intermediary in the conversion of tryptophan to TOL and ILA. Of all theCryptococcusspecies tested, only isolates ofC. neoformanssynthesized both indole compounds. Thus, the two products—which can be readily isolated and identified by gas-liquid chromatography—could serve as markers for distinguishingC. neoformansfrom other species ofCryptococcus.

ISSN:0027-5514    

DOI:10.1080/00275514.1980.12021220

出版商:Taylor&Francis    

年代:1980

数据来源: Taylor

摘要:

SUMMARYPopulations of the saxicolous lichenXanthoparmelia conspersawere sampled from two Potomac River islands. Plummers Island is located below the Cabin John Bridge between Maryland and Virginia, and is subjected to atmospheric fallout from automobile exhaust and road de-icing chemicals. Bear Island is located 6 km upstream of the bridge. Emission- spectrophotometric analysis of lichen material from the two islands revealed a significant accumulation of a number of elements, notably Ca and Pb. Energy-dispersive X-ray microanalysis of the lichen material revealed an observable peak for Ca in the Plummers Island sample. Analysis of three common lichen herbivores, a collembolan (Hypogastrura packardi), and two oribatid mites (Oribata quadripilisandEremaeussp. nearpolitus), revealed a distinct calcium peak in the orbatids sampled from Plummers Island. The collembolan exhibited no detectable calcium accumulation. The recognized importance of lichens as elemental accumulators in terrestrial ecosystems is further defined in terms of nutrient transfers to important soil microarthropods. This mode of element transfer from lichens has not been evaluated adequately.

ISSN:0027-5514    

DOI:10.1080/00275514.1980.12021221

出版商:Taylor&Francis    

年代:1980

数据来源: Taylor

摘要:

SUMMARYFourteen helicosporous fungi collected in Hawaii are reported and selected species illustrated.Helkorna machaerinaewhich appears to occur as a biotrophic parasite on the sedgeMachaerina angustifolia, is described and illustrated as a new species.Helicoma westoniandH. atroseptatumare reported, apparently for the first time, outside of their type localities. As there are few previous reports of helicosporous fungi in Hawaii, most of the fungi reported represent new records for the state.

ISSN:0027-5514    

DOI:10.1080/00275514.1980.12021222

出版商:Taylor&Francis    

年代:1980

数据来源: Taylor

ISSN:0027-5514    

DOI:10.1080/00275514.1980.12021223

出版商:Taylor&Francis    

年代:1980

数据来源: Taylor

ISSN:0027-5514    

DOI:10.1080/00275514.1980.12021224

出版商:Taylor&Francis    

年代:1980

数据来源: Taylor

ISSN:0027-5514    

DOI:10.1080/00275514.1980.12021225

出版商:Taylor&Francis    

年代:1980

数据来源: Taylor