This experiment investigated the effects of different doses of Bacillus subtilis spore as a probiotic on the immune response, intestinal morphology and ileal dry matter digestibility in broiler chicks exposed to stress induced by corticosterone (CORT). Two hundred and eighty-eight one-day-old Ross 308 male broiler chicks were randomly assigned to six treatments in a <e...

Two distinct spore appendage types of Clostridium bifermentans, a pinlike appendage and a tubular appendage, were studied by electron microscopy. The pinlike appendage is characterized by a shaft, about 100 A in diameter, which has a lobed caplike structure. The tubular appendage, 500 to 600 A in diameter, is characterized by a hirsute region consisting of small filaments or fibrils. Gross morp...

Abstract This study presents Paxilloboletus gen. nov., a new lamellate bolete genus represented by two tropical African species, africanus sp. nov. and latisporus Although the taxa strongly resemble Paxillus (Paxillaceae), they lack clamp connections form separate generic clade within Boletaceae phylogeny. The species are lookalikes, morphologically only separable their spore morphology. Descri...

Caeoma cassiopae sp. nov. (Uredinales) is described on the arctic-alpine shrub Cassiope tetragona. It was found in three locations in the Rocky Mountains of west-central Alberta, and is the first rust reported on the genus Cassiope. The sori resemble the uredinia of species in the genus Chrysomyxa. The host in the Ericaceae also suggests affinity with that genus. However, the spore morphology, ...

Amino acid sequence analysis of tryptic peptides derived from purified penicillin-binding protein PBP2a of Bacillus subtilis identified the coding gene (now termed pbpA) as yqgF, which had been sequenced as part of the B. subtilis genome project; pbpA encodes a 716-residue protein with sequence similarity to class B high-molecular-weight PBPs. Use of a pbpA-lacZ fusion showed that pbpA was expr...

The morphology and phylogeny of anther smut specimens on Tractema verna collected in the United Kingdom were investigated using light microscopy, scanning electron microscopy and partial rDNA sequence analyses. The anther smut of Tractema verna shows similarity to Antherospora eucomis, A. scillae, A. tourneuxii, A. urgineae, A. vaillantii, and A. vindobonensis but differs in spore size range, s...