บทคัดย่องานวิจัย

หมวดหมู่ : ฐานข้อมูลงานวิจัย

Critical ethylene exposure for Hibiscus rosa-sinensis is dependent on an interaction between ethylene concentration and duration.

Hoyer, L.

Postharvest Biology and Technology Vol: 9 Issue: 1 Pages: 87-95 Ref: 21 ref.

1996

บทคัดย่อ

Critical ethylene exposure for Hibiscus rosa-sinensis is dependent on an interaction between ethylene concentration and duration.

Experiments were designed to test the effects of ethylene on H. rosa-sinensis pot plants, and to define the critical level of ethylene exposure to elicit a response. Plants were held in darkness for 72 h at 18 or 19 deg C and exposed to 0.05, 0.1, 1.0 or 5.0 micro l ethylene/litre for 6, 12, 24 or 72 h during the dark period. Following exposure to ethylene, the plants were placed in a post-production evaluation room. The abscission of buds and leaves in response to ethylene was dependent on duration of exposure and concentration of the growth regulator. Buds showing colour were the most ethylene-sensitive parts of the plant, followed by green buds and finally leaves. At low ethylene exposures, the abscission response was delayed. H. rosa-sinensis was found to be very sensitive to ethylene, e.g. there was extensive abscission of buds after 24 h of exposure to 0.05 micro l/litre. In addition to the ethylene response, extensive bud abscission was caused by darkness or low light levels.