A method for the selection of mutants ofPhycomyces blakesleeanusdefective in germination
โ Scribed by J. L. Micol; F. J. Murillo
- Book ID
- 104759791
- Publisher
- Springer-Verlag
- Year
- 1986
- Tongue
- English
- Weight
- 474 KB
- Volume
- 10
- Category
- Article
- ISSN
- 0172-8083
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โฆ Synopsis
A simple method for the physical separation of dormant and germinated cells of Phycornyces blakesleeanus has been designed. Separation was attained by isopycnic centrifugation in a preformed discontinuous density gradient of Urografin. In this gradient, dormant spores and active cells at two different stages of germination were separated in three homogeneous and clearly distinct bands. The method has been used to follow the kinetics of the variation of cellular density during germination of wild type spores and to select for mutants temperature-sensitive for heat-shock induced germination. Sixty-nine mutants have been isolated by various procedures which include a separation step in the described Urografin gradient.
๐ SIMILAR VOLUMES
Null-point action spectra of the light-growth response were measured for three mutants of Phycomyces blakesleeanus (Burgeff) and compared with the action spectrum of the wild type (WT). The action spectrum for L150, a recently isolated "night-blind" mutant, differs from the WT spectrum. The L150 act