บทคัดย่องานวิจัย

หมวดหมู่ : ฐานข้อมูลงานวิจัย

MA storage may reduce chilling sensitivity of tulip bulbs.

Inamoto, K.; Sakoda, S.; Doi, M.; Imanishi, H.;

Postharvest Horticulture Series - Department of Pomology, University of California Year: 1997 Issue: No. 18 Pages: 119-126 Ref: 10 ref.

1997

บทคัดย่อ

MA storage may reduce chilling sensitivity of tulip bulbs.

Tulip bulbs (cv. Gander) were packed tightly in a polyethylene (PE) bag or a nylon/polyethylene laminate (NP) bag in late October 1996. Control bulbs were placed in a net. After chilling for 12 weeks at 2 deg C, the bulbs were removed from the package and kept at 2 deg for another week. They were then hydroponically forced at 20 deg under artificial lighting conditions (100 mmol m-2 s-1). The concentration of O2, N2 and CO2 in the PE bag was similar to that of ambient air in the refrigerator throughout the storage period. The N2 concentration in the NP bag decreased during storage, finally reaching 30%. The CO2 concentration increased from 0.04% to 27% during the initial first week and it finally rose to nearly 70%. The O2 concentration in the NP bag decreased to 1% during the first week of storage. No significant difference was detected between control and packed bulbs in bulb fresh weight, dry weight and FW:DW ratio at planting. However, bulbs packed in the NP bag had a smaller shoot with unde

veloped flower organs at planting. Their outer and inner daughter bulblets were also poorly developed. All control plants and plants grown from the bulbs packed in the PE bag (PE plants) flowered and only 70% of the plants grown from bulbs packed in the NP bag (NP plants) flowered. PE plants flowered 3 days earlier than the control plants, while NP plants flowered 10 days later. NP plants had a shorter stem and a lighter shoot, but had a perianth size similar to that of control plants. The relative growth rate of shoots, flowers, mother bulbs and daughter bulblets from planting to anthesis (RGR) in NP plants was smaller but RGR of shoots in NP plants was similar to that in control plants. These data suggest that MA conditions created by NP reduce the chilling sensitivity of bulbs.