摘要:

ABSTRACTAmong hat-spored isolates of the genusPichiacollected in firass from trees in the U.S. and Japan were strains of two taxa that could not be identified with presently described species. These new homothallic species, described asP. hampshirensis(type strain, NRRL YB-4128 = CBS 7208) andP. japonica(type strain, NRRL YB-2750 = CBS 7209), show little nuclear DNA relatedness toP. wickerhamii, P. rhodanensis, P. mississippiensis, P. toletana, and other phenotypically similar taxa.

ISSN:0027-5514    

DOI:10.1080/00275514.1987.12025398

出版商:Taylor&Francis    

年代:1987

数据来源: Taylor

摘要:

ABSTRACTUredospore germlings ofUromyces appendiculatuswere induced by K+, Ca++, or sucrose in order to form appressoria chemotropically to determine more clearly the mode of differentiation. Differentiation occurred only when the germlings grew aerially, away from the solutions or agar media containing KCl, CaCl2, or sucrose. Germlings submerged in these solutions differentiated only when a topographically inductive surface was provided. The microtubule cytoskeleton was symmetrically arranged in germlings grown aerially and asymmetrically in germlings grown on a firm substrate.

ISSN:0027-5514    

DOI:10.1080/00275514.1987.12025399

出版商:Taylor&Francis    

年代:1987

数据来源: Taylor

摘要:

ABSTRACTNeurospora intermediais found on burned substrates in all tropical and subtropical areas that have been sampled in both Eastern and Western Hemispheres. Cultures from burned substrates are salmon orange and are virtually indistinguishable in appearance from typical strains ofN. crassaandN. sitophila.A second, distinctN. intermediaecotype is found almost exclusively on nonburned substrates and only in the Eastern Hemisphere. This type is saffron yellow rather than salmon orange, with conidia that are significantly larger than those of the other type. The two ecotypes are conspecific on the basis of intercross fertility, although strains of the yellow type show reduced fertility both among themselves and in crosses with orange strains. The visible differences between the types are due to multiple genes which are not tightly linked.

ISSN:0027-5514    

DOI:10.1080/00275514.1987.12025400

出版商:Taylor&Francis    

年代:1987

数据来源: Taylor

摘要:

ABSTRACTThe cultured somatic (assimilative) stage ofEndogone pisiformis(Endogonales) was examined ul- trastructurally and cytochemically. The fungus produces thin-walled, coenocytic and irregularly shaped hyphae with many swellings. The cell wall is thick and is organized into two layers, an outer electron-lucent layer and an inner electron-opaque layer. The cytoplasm of the hyphae and swellings shows considerable morphological variation based on the sampling site in the colony. Young cells sampled at the margin of the colony have granular protoplast rich in cellular organelles and membrane profiles, while those sampled 1–2 cm away from the margin of the colony are vacuolated with abundant lipid and glycogen inclusions. Intrahyphal hyphae are frequently observed in mature hyphae and hyphal swellings ofE. pisiformis.Specific macromolecules were identified and localized in different cellular organelles ofE. pisiformisby using different enzyme- and lectin-gold complexes,α-amylase-gold and phospholipase-gold complexes labeled glycogen inclusions and phospholipids respectively. Sugar residues, such as N-acetylglucosamine, fucose and mannose, were localized in different organelles, using wheat germ agglutinin,Ulex europaeusand Concanavalin A lectins respectively. The cytochemical results are discussed in relation to the development ofE. pisiformis, along with speculations on the function and significance of these macromolecules.

ISSN:0027-5514    

DOI:10.1080/00275514.1987.12025401

出版商:Taylor&Francis    

年代:1987

数据来源: Taylor

摘要:

ABSTRACTThe fate of ascospores of an indigenous soil fungus,Coniochaeta nepalica, and a coprophilous species,Sordaria fimicola, supported on polyvinyl chloride membranes and introduced into the A horizon of a Long Island oak-birch forest was studied for up to 210 days. Ascospores of both species were rapidly lost from the filters during late fall and early winter when a similar decrease in the natural population ofC. nepalicaoccurred. Evidence is presented that grazing by soil arthropods rather than microbial lysis, depletion of endogenous reserves, dormancy loss, predation, or water transportation is responsible for the decrease in ascospore numbers on the filters and by analogy in soil.

ISSN:0027-5514    

DOI:10.1080/00275514.1987.12025402

出版商:Taylor&Francis    

年代:1987

数据来源: Taylor

摘要:

ABSTRACTThe population structure ofPeniophora rufawas studied by analysis of somatic and sexual incompatibility behavior. In a plantation ofPopulus tremuloidesin central New York,P. rufaforms populations composed of numerous genetically and physically discrete individuals. Analysis of a single dead limb showed that at least 7 individuals were present. Also, a survey conducted at the plantation to assess the diversity of the basidiomycete community revealed thatP. rufawas the second most common species fruiting on dead aspen limbs.

ISSN:0027-5514    

DOI:10.1080/00275514.1987.12025403

出版商:Taylor&Francis    

年代:1987

数据来源: Taylor

ISSN:0027-5514    

DOI:10.1080/00275514.1987.12025404

出版商:Taylor&Francis    

年代:1987

数据来源: Taylor

ISSN:0027-5514    

DOI:10.1080/00275514.1987.12025405

出版商:Taylor&Francis    

年代:1987

数据来源: Taylor

ISSN:0027-5514    

DOI:10.1080/00275514.1987.12025406

出版商:Taylor&Francis    

年代:1987

数据来源: Taylor

ISSN:0027-5514    

DOI:10.1080/00275514.1987.12025407

出版商:Taylor&Francis    

年代:1987

数据来源: Taylor