摘要:

ABSTRACTHypogeous sporocarps of ectomycorrhizal fungi were harvested from 10 Douglas-fir stands representing a variety of natural habitats. Calculated over all stands, total dry standing biomass equaled 1.3 kg/ha, and the maximum single stand sample biomass equaled 9.9 kg/ha. Forty-seven species of hypogeous fungi were recorded; 14 accounted for 94% of the total biomass.Elaphomyces granulatus, Gautieria monticola, Hysterangium coriaceum, Leucogaster rubescens, andRhizopogon parksiiaccounted for 73% of the biomass.In contrast to epigeous species in the study area, hypogeous sporocarp production was higher in spring than in fall. Production was evaluated in five Douglas-fir habitats (wet old-growth, mesic old-growth, dry old-growth, mesic mature, and mesic young), forming two gradients, wet to dry and young to old. The mesic mature forest habitat had the highest standing biomass value (2.2 kg/ha) of all the habitats studied. The dry old-growth forest habitat had the lowest (0.7 kg/ha).Individual species showed strong seasonal trends. Most had spring or summer production peaks. Some also showed differences in sporocarp production by habitat. For example,Leucogaster rubescenshad peak biomass in the dry old-growth habitat, and the peak biomass ofLeucophleps magnatawas in habitats other than old-growth. In contrast,Rhizopogon vinicolorwas well distributed throughout all habitats.Analysis of sample value distributions indicated that samples of small total area (≤800 m2) tended to overestimate sporocarp biomass, because biomass was strongly skewed toward high values. Additionally, systematic placement of the largest practical number of quadrats reduced the tendency of localized sporocarp concentrations to cause further overestimation of standing biomass, when extended to a grams per hectare basis.

ISSN:0027-5514    

DOI:10.1080/00275514.1991.12026018

出版商:Taylor&Francis    

年代:1991

数据来源: Taylor

摘要:

ABSTRACTA sporulation-deficient (sporeless) mutant inLentinus edodesgave rise to basidiocarps visibly indistinguishable from those of wild-type dikaryons. In the basidia, karyogamy and meiosis occurred normally and sterigmata developed after meiosis, but the distal ends of the sterigmata usually did not swell. Up to the stage of sterigmal development, the nuclei, mitochondria and other cell organelles in the basidia appeared to be intact. Basidia bearing only two or three sterigmata occunred more often in the mutant than in the wild type. Basidia with eight nuclei were not found in the mutant, indicating that post-meiotic mitosis did not occur. These results suggested that, in most cases, the process of sporulation in the mutant was arrested during or right after the development of sterigmata. Genetic analysis of this mutant indicated that the sporulation deficiency was controlled by a single recessive gene,spo, which was not linked to either theAor theBincompatibility factor.

ISSN:0027-5514    

DOI:10.1080/00275514.1991.12026019

出版商:Taylor&Francis    

年代:1991

数据来源: Taylor

摘要:

ABSTRACTStylopage anomala, previously known only from the type collection in England, is a member of an increasingly well known assemblage of dung fungi dispersed by arthropods rather than herbivore gut passage. CapiUiconidia ofS. anomalawere commonly found on phoretic gamasid mites of dung beetles collected in Ontario and New Brunswick, Canada, and also on a mite phoretic on a dipteran from Wyoming.Sappinia pedata, an amoeba preyed upon byS. anomala, has an adhesive stage that resists desiccation and can be dispersed by phoretic mites.Stylopage anomalaandSappinia pedataalso have been found to occur together on cow and horse dung in Belgium.

ISSN:0027-5514    

DOI:10.1080/00275514.1991.12026020

出版商:Taylor&Francis    

年代:1991

数据来源: Taylor

ISSN:0027-5514    

DOI:10.1080/00275514.1991.12026021

出版商:Taylor&Francis    

年代:1991

数据来源: Taylor

ISSN:0027-5514    

DOI:10.1080/00275514.1991.12026022

出版商:Taylor&Francis    

年代:1991

数据来源: Taylor

ISSN:0027-5514    

DOI:10.1080/00275514.1991.12026023

出版商:Taylor&Francis    

年代:1991

数据来源: Taylor

ISSN:0027-5514    

DOI:10.1080/00275514.1991.12026024

出版商:Taylor&Francis    

年代:1991

数据来源: Taylor

ISSN:0027-5514    

DOI:10.1080/00275514.1991.12026025

出版商:Taylor&Francis    

年代:1991

数据来源: Taylor

ISSN:0027-5514    

DOI:10.1080/00275514.1991.12026007

出版商:Taylor&Francis    

年代:1991

数据来源: Taylor