ISHS Acta Horticulturae 205: Symposium on the Development of New Floricultural Crops, XXII IHC
ENDOGENOUS GROWTH PROMOTER AND INHIBITOR LEVELS IN PLEIONE FORMOSANA CORMS |
| Authors: | N. Lee, W.L. Teng |
| Abstract:
Endogenous hormones of the corms of Pleione formosana Hayata were analyzed with HPLC at various stages of growth and development. The content of abscisic acid (ABA) decreased with corm growth, but increased rapidly during leaf abscission and at harvest. It decreased again during a natural chilling period. The GA and IAA contents increased rapidly during sprouting and reached to a peak when flower buds show color. The ratio of growth promoter/inhibitor dropped to a minimum of 0.35 at leaf abscission. The ratio increased during cold storage and reached to a maximum of 7.52 at the sprouting stage when flower buds show color. The highest GA content was found in August, the time of flower bud formation. | |
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