Phased cell division in natural populations of the marine diatom Ditylum brightwelli and the potential significance of diel phytoplankton behavior in the sea

1975 ◽  
Vol 22 (3) ◽  
pp. 151-165 ◽  
Author(s):  
Theodore J. Smayda
Keyword(s):  
Cell Division ◽  
Natural Populations ◽  
Marine Diatom ◽  
Potential Significance

scholarly journals Temporal patterns of cell division in natural populations of endosymbiotic algae

1983 ◽  
Vol 28 (5) ◽  
pp. 1009-1014 ◽  
Author(s):  
F. P. Wilkerson ◽  
G. Muller ◽  
Parker L. Muscatine
Keyword(s):  
Cell Division ◽  
Natural Populations ◽  
Temporal Patterns ◽  
Endosymbiotic Algae

scholarly journals Rapid Accumulation of Mutations in Growing Mycelia of a Hypervariable Fungus Schizophyllum commune

2020 ◽  
Vol 37 (8) ◽  
pp. 2279-2286
Author(s):  
Aleksandra V Bezmenova ◽  
Elena A Zvyagina ◽  
Anna V Fedotova ◽  
Artem S Kasianov ◽  
Tatiana V Neretina ◽  
...  
Keyword(s):  
Cell Division ◽  
Mutation Rate ◽  
De Novo ◽  
Schizophyllum Commune ◽  
Natural Populations ◽  
De Novo Mutations ◽  
Rapid Accumulation ◽  
Living Organisms ◽  
Very High ◽  
Rate Of Accumulation

Abstract The basidiomycete Schizophyllum commune has the highest level of genetic polymorphism known among living organisms. In a previous study, it was also found to have a moderately high per-generation mutation rate of 2×10−8, likely contributing to its high polymorphism. However, this rate has been measured only in an experiment on Petri dishes, and it is unclear how it translates to natural populations. Here, we used an experimental design that measures the rate of accumulation of de novo mutations in a linearly growing mycelium. We show that S. commune accumulates mutations at a rate of 1.24×10−7 substitutions per nucleotide per meter of growth, or ∼2.04×10−11 per nucleotide per cell division. In contrast to what has been observed in a number of species with extensive vegetative growth, this rate does not decline in the course of propagation of a mycelium. As a result, even a moderate per-cell-division mutation rate in S. commune can translate into a very high per-generation mutation rate when the number of cell divisions between consecutive meiosis is large.

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