Table I.
Strains of P. blakesleeanus (Burgeff) used in this work
| Strain | Genotype | Phenotype | Reference |
|---|---|---|---|
| NRRL1555 | (-) | Wild type | Bergman et al. (1973) |
| C5 | carB10 geo-10 (-) | White, hypergravitropic | Meissner and Delbrück (1968) |
| C213 | carA5 geo-3 (-) | White, no crystals, defective tropisms | Schimek et al. (1999a, 1999b) |
| C171 | carA30 carR21 (-) | White | Ootaki et al. (1973) |
| A909 | madJ407 (-) | Defective tropisms | Campuzano et al. (1996) |
Mutant strains were derived from the wild-type NRRL1555 by mutagenesis with nitrosoguanidine. Genetic designations: geo indicates abnormal gravitropism; car indicates absence of β-carotene; (-) denotes the mating type. Crystals refer to the octahedral crystals (Ootaki and Wolken, 1973), which probably serve as statoliths of gravitropism (Schimek et al., 1999a, 1999b).