Replacement of chilling requirement in seeds of Ruellia humilis by gibberellic acid.
Gibberellic acid (GA3) completely replaced the chilling requirement of intact, dormant seeds of Ruellia humilis. At 30° 100 and 1000 mg/l completely replaced the chilling requirement, while in seeds germinated at 25° 100 mg/l GA3 was ineffective but 1000 mg/l entirely replaced the after-ripening requirement at low temperature.
Department of Botany, University of Kentucky, Lexington.
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Baskin