บทคัดย่องานวิจัย

หมวดหมู่ : ฐานข้อมูลงานวิจัย

Role of flower buds in flower bud abscission in Hibiscus.

Meeteren, U. van and Gelder, H. van

Acta Horticulturae Year: 1995 Issue: No. 405 Pages: 284-289 Ref: 17 ref.

1995

บทคัดย่อ

Role of flower buds in flower bud abscission in Hibiscus.

 

Plants of Hibiscus rosa-sinensis cv. Nairobi kept in darkness showed abundant shedding of their flower buds after 4-6 days, due to abscission at a layer in the pedicels about 3 mm below the bud. Abscission was accompanied by an increase in ethylene emission by the flower buds as well as by an increase in ACC and MACC content. Removal of flower buds induced abscission of the remaining pedicels under white light conditions, but delayed dark-induced abscission. In disbudded plants, time curves for cumulative abscission in darkness and under white light conditions were similar. Pedicel explants showed no abscission unless the flower bud was attached to the pedicel. Exogenous ACC induced abscission in pedicel explants. IAA drastically reduced ACC-induced pedicel abscission in explants. The results indicate that the flower bud is a source of an abscission-promoting-substance as well as of an abscission-inhibiting-substance.