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Fig. 4. Response of sporogenous strains to spore inducers. Mutant strains
overexpressing the catalytic subunit of PKA as the result of being transformed
with the KP construct were developed as monolayers at 2x103
cells/cm2 for 20 hours. Cells of the indicated mutant strains were
then treated with no addition (none), 100 nM discadenine (disc), 100 nM
isopentenyl adenine (iP), 1 µM zeatin, 10 pM synthetic SDF-1, 10 pM
synthetic SDF-2 or 1 µM GABA. Spores were counted after 1 hour. Cells
treated with SDF-1 were scored after 90 minutes. Each experiment was repeated
three times. Error bars correspond to one standard deviation.