There is no generally acceptable starting point from which to launch a historical account of studies on the cytological features of the reproductive elements in the Saprolegniaceae. Indeed, we have already touched generously upon aspects of morphology that quite properly can be thought of as classical cytology -spore cleavage and septum delimitation, to name two examples. Ignoring any dictates ...

Fungi are one of the major lineages of eukaryotes and the sister group of animals. We will consider evolutionary relationships among different groups of fungi, their ecology and significance to humans. We will explore fungal lifestyles, their reproduction, and the ways that fungi use to communicate with each other and with their symbiotic partners. In addition to true fungi, we will study sever...

The morphology and secondary metabolism of Aspergillus spp. are associated with initial spore density (ISD). Fatty acids (FA) are involved in the biosynthesis of aflatoxins (AF) through Aspergillus quorum sensing (QS). Here, we studied how ochratoxin A (OTA) was regulated by spore density in Aspergillus ochraceus CGMCC 3.4412. The results contribute to understanding the role of spore density in...

While a newly isolated bacterium would usually, as a mat ter of bionomic routine, be tested soon for its power of fermentation of various carbohydrates, nothing systematic has been done in this direction with the group of organisms dassed as spirochetes. The lack of investigation along this line may be partly due to the technical difficulties which still surround the cultivation of these organi...

While a newly isolated bacterium would usually, as a mat ter of bionomic routine, be tested soon for its power of fermentation of various carbohydrates, nothing systematic has been done in this direction with the group of organisms dassed as spirochetes. The lack of investigation along this line may be partly due to the technical difficulties which still surround the cultivation of these organi...

The original description of Henneguya pellis, a myxozoan parasitizing blue catfish Ictalurus furcatus, is supplemented with new data on histopathology, spore morphology, and 18S small subunit (SSU) ribosomal DNA (rDNA) sequence. Plasmodia presented as both internal and external, raised, cyst-like lesions on the body wall of the peritoneal cavity and on the skin. The cysts contained numerous elo...

The MADS-box transcription factor SrfA is involved in spore differentiation in Dictyostelium [Development 125 (1998) 3801]. Mutant spores show an altered morphology and loss of viability. A detailed structural analysis of mutant spores has been performed to gain insight into the specific aspects of spore differentiation in which SrfA is involved. Two main structural defects have been observed. ...