Publications by authors named "Gail J Celio"
Premise Of The Study: The earliest eukaryotes were likely flagellates with a centriole that nucleates the centrosome, the microtubule-organizing center (MTOC) for nuclear division. The MTOC in higher fungi, which lack flagella, is the spindle pole body (SPB). Can we detect stages in centrosome evolution leading to the diversity of SPB forms observed in terrestrial fungi? Zygomycetous fungi, which consist of saprobes, symbionts, and parasites of animals and plants, are critical in answering the question, but nuclear division has been studied in only two of six clades.
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- The study examines the cystidia (spore-bearing cells) of two related mushroom species, Suillus americanus and S. granulatus, using advanced imaging techniques.
- It reveals conserved ultrastructural features and cytological functions of these cystidia, contributing new data for a major research database on fungal biology.
- The findings suggest that these specific cellular traits could be valuable in understanding evolutionary relationships among fungi and improving phylogenetic studies at the family or genus level.
Ultrastructure of the septal pore apparatus and nuclear division of Auriscalpium vulgare (Russulales) was examined with freeze substitution and is presented for inclusion in the AFTOL Structural and Biochemical Database (http://aftol.umn.edu).
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- The study investigates the phylogeny of Auriculoscypha anacardiicola, a fungus associated with scale insects in India, using advanced genetic analyses on RNA sequences.
- The fungus has unique features such as simple septa and a distinctive pore plug that connects it to certain parasitic fungi, and its structural characteristics resemble those of the genus Septobasidium.
- The molecular findings challenge the classification of Auriculoscypha within the Platygloeales order, suggesting it should be placed in the Septobasidiales based on both structural and genetic evidence.
This article reports on the use of high pressure freezing followed by freeze substitution (HPF/FS) to study ultrastructural details of host-pathogen interactions in fungal diseases of plants. The specific host-pathogen systems discussed here include a powdery mildew infection of poinsettia and rust infections of daylily and Indian strawberry. The three pathogens considered here all attack the leaves of their hosts and produce specialized hyphal branches known as haustoria that invade individual host cells without killing them.
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