บทคัดย่องานวิจัย

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Gibberellin 4+7, benzyladenine, and supplemental light improve postharvest leaf and flower quality of cold-stored 'Stargazer' hybrid lilies.

Ranwala, A.P. and Miller, W. B.

Journal of the American Society for Horticultural Science. Volume 123, Number 4, July 1998. Pages 563-568

1998

บทคัดย่อ

Gibberellin4+7, benzyladenine, and supplemental light improve postharvest leaf and flower quality of cold-stored 'Stargazer' hybrid lilies.

Experiments were conducted to evaluate storage temperature, storage irradiance and prestorage foliar sprays of gibberellin, cytokinin or both on postharvest quality of Oriental hybrid lilies (Lilium sp. 'Stargazer'). Cold storage of puffy bud stage plants at 4, 7, or 10 degrees C in dark for 2 weeks induced leaf chlorosis within 4 days in a simulated consumer environment, and resulted in 60% leaf chlorosis and 40% leaf abscission by 20 days. Cold storage also reduced the duration to flower bud opening (days from the end of cold storage till the last flower bud opened), inflorescence and flower longevity, and increased flower bud abortion. Storage at 1 degree C resulted in severe leaf injury and 100% bud abortion. Providing light up to 40 micromole.m-2.s-1 during cold storage at 4 degrees C significantly delayed leaf chlorosis and abscission and increased the duration of flower bud opening, inflorescence and flower longevity, and reduced bud abortion. Application of hormone sprays before cold storage affected leaf and flower quality. ProVide (100 mg.L-1 GA4 + 7) and Promalin (100 mg.L-1 each GA4 + 7 and benzyladenine (BA)) effectively prevented leaf chlorosis and abscission at 4 degrees C while ProGibb (100 mg.L-1 GA3) and ABG-3062 (100 mg.L-1 BA) did not. Accel (10 mg.L-1 GA4 + 7 and 100 mg.L-1 BA) showed intermediate effects on leaf chlorosis. Flower longevity was increased and bud abortion was prevented by all hormone formulations except ProGibb. The combination of light (40 micromole.m-2.s-1) and Promalin (100 mg.L-1 each GA4 + 7 and BA) completely prevented cold storage induced leaf chlorosis and abscission.