A new species of Didymium (Myxomycetes), D. infundibuliforme, is described herein, and details are provided on its life cycle as observed in spore to spore culture on agar. The new species was recorded during intensive studies of areas of the Monte Desert in Argentina and the Atacama Desert in Chile. It has been collected directly in the field in both countries on several occasions over 4 y and...

PRYER, K. M., and D. M. BRITTON. 1983. Spore studies in the genus Gymnocarpiurn. Can. J. Bot. 61: 377-388. Scanning electron microscopy was used to examine the variation in perispore characters within and between six currently recognized taxa of the genus Gyrnnocarpiurn Newm. in North America. Representative scanning electron micrographs are presented and depict the perispore features observed....

A new species of Physarum (Myxomycetes), Physarum atacamense is described in this paper, and details are provided on its life cycle as observed in spore-to-spore culture in agar. The new species was collected during studies of the Atacama Desert in Chile. It has been collected directly in the field and isolated in moist chamber cultures prepared with material from an endemic cactus. The combina...

There is uncertainty regarding the validity of Myxobolus heterosporus Baker, 1963. The present study revises the taxonomy, using specimens isolated from plasmodia situated in the infected cornea of Oreochromis aureus, O. niloticus or Tilapia zillii inhabiting the River Nile, Egypt. In addition, histological effects of the parasite on the infected tissue were examined. The spores of M. heterospo...

Introduction: Aspergillus fumigatus is the leading cause of invasive aspergillosis in immunocompromised patients with a high rate of mortality. Despite introduction of several classes of antifungal drugs, the limitations of current therapies have prompted an intense research toward the discovery of new antifungal compounds. In a recent study, several potential drug targets were identified based...

BACKGROUND Diatoms are one of the most ecologically important aquatic micro-eukaryotes. As a group unambiguously recognized as diatoms, they seem to have appeared relatively recently with a limited record of putative remains from oldest sediments. In contrast, molecular clock estimates for the earliest possible emergence of diatoms suggest a considerably older date. Depending on the analysis, P...

Pridham, Thomas G. (Northern Regional Research Laboratory, Peoria, Ill.), and Allister J. Lyons. Further taxonomic studies on straight to flexuous streptomycetes. J. Bacteriol. 89:331-342. 1965.-The best way to handle streptomycete classification, nomenclature, and identification is through application of a genus-species-subspecies concept. To establish a species, principal criteria are morphol...

Two glomoid spore-producing arbuscular mycorrhizal fungi were grown in single-species cultures that established from soil-borne spores collected high altitude (2800 m a.s.l.) of Tibet Plateau, China. Phylogenetic analyses performed with sequences nuclear rDNA (spanning the partial small subunit, whole internal transcribed spacer, and large subunit segment; 18S-ITS-28S) largest RNA polymerase II...

In this study we examine the distribution of Rhizopogon species in spore banks from five California pine forests. Four of the forest sites were discontinuous populations of Pinus muricata and a fifth was a Pinus ponderosa stand in Sierra National Forest. Rhizopogon species were retrieved by bioassaying the soils with pine seedlings followed by isolation of axenic cultures from individual root t...