Gibberellin and growth inhibitor changes in potato tuber buds in response to cold treatment

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Abstract
SUMMARY: Eye plugs removed from tubers of four potato cultivars previously stored for 14 days at 2 °C and then left at 15 °C for a further 14 days contained more gibberellin and less growth inhibitor activity than those kept at 15 °C for 28 days. Two gibberellin‐active peaks were obtained when the extracts from cold‐treated tubers were separated on paper chromatograms with an isopropanol/ammonia/water solvent. The main inhibitor did not appear to be abscisic acid.