Understanding the Barriers to Interspecific Hybridization in Neurospora. (May 2012) Sameer Rajendra Gajjar Department of Biochemistry and Biophysics Texas A&M University Research Advisor: Dr. Rodolfo Aramayo Department of Biology Crosses between two species of Neurospora are typically sterile and result in the production of non-viable or few viable ascospores. It is unclear what prevents succes...

The ascomycete fungus Neurospora is present in many parts of the world, in particular in tropical and subtropical areas, where it is found growing on recently burned vegetation. We have sampled the Neurospora population across Spain. The sampling sites were located in the region of Galicia (northwestern corner of the Iberian peninsula), the province of Cáceres, the city of Seville, and the two ...

Circadian clocks are self-sustaining timekeepers found in almost all organisms on earth. The filamentous fungus Neurospora crassa is a preeminent model for eukaryotic circadian clocks. Investigations of the Neurospora circadian clock system have led to elucidation of circadian clock regulatory mechanisms that are common to all eukaryotes. In this work, we will focus on the Neurospora circadian ...

Trimethylated lysine 27 on histone H3 (H3K27me3) is present in Drosophila, Arabidopsis, worms, and mammals, but is absent from yeasts that have been examined. We identified and analyzed H3K27me3 in the filamentous fungus Neurospora crassa and in other Neurospora species. H3K27me3 covers 6.8% of the N. crassa genome, encompassing 223 domains, including 774 genes, all of which are transcriptional...

Neurospora is among the most studied of all eukaryotes. It is a convenient organism for the study of genetic polymorphism through analysis of isozymes (Yu, Garrett & Sussman, 1971 ; Reddy & Threlkeld, 1971,1972), and the possibility of population studies with Neurospora has been demonstrated by Perkins (1970) who collected isolates from over 60 localities in the tropics. However, Perkins' colle...

In the red bread mold Neurospora crassa as in other pyrenomycetes the sexual spores, the ascospores, germinate only after the application of heat (Shear and Dodge, 1927; Goddard, 1935, 1938, 1939). When treated at a temperature of from 50 to 60 C for periods varying from 10 to 60 minutes the spores will germinate up to 100 per cent. Germination may occur without this treatment, the percentage d...

In the fungus Neurospora crassa, hexagonal crystalline inclusions have been observed with both the light and electron microscopes. These crystals have been enriched by differential centrifugation and found to be identical with ergosterol by the criteria of ultraviolet spectral analysis and cytochemical analysis. Observations have been made on the distribution and fine structure of the crystalli...