บทคัดย่องานวิจัย

หมวดหมู่ : ฐานข้อมูลงานวิจัย

Bougainvillea post-production: NAA and STS control of bract abscission is subject to exogenous ethylene.

Gago, C. M. L.; Monteiro, J. A.; Rodrigues, M. H.;

Acta Horticulturae Year: 2001 Issue: No. 543 Pages: 47-51 Ref: 13 ref.

2000

บทคัดย่อ

Bougainvillea post-production: NAA and STS control of bract abscission is subject to exogenous ethylene.

The effect of NAA (500 mg.L-1 sprayed once at end-of-production), silver thiosulfate (STS; 0.4 mM sprayed every 15 days after bracts started to be apparent) and STS + NAA on Bougainvillea spectabilis plants exposed or not exposed to exogenous ethylene (from ethephon), were tested using two completely randomized experiments. At the end-of-production, plants were placed for three days under simulated transport conditions (17 plus or minus 1 deg C, no light) and then, placed under interior conditions (21 plus or minus 1 deg C and 11 micro mol.m-2s-1 of cool white fluorescent light 12 hr a day). Twice a week, during postproduction (PP) the number of developing (D) bracts as well as the number of completely developed (CD) bracts remaining in the plants were assessed. Among the treatments tested, NAA was enough to reduce CD bract abscission during post-production, abscising at day 32 PP, a maximum of 50% of the bracts, provided that no exogenous ethylene was present. If plants were exposed to exogenou

s ethylene, then the treatment STS + NAA was needed to reduce bract abscission, abscising at 32 PP a maximum of 58% of CD bracts. At this time, plants treated only with STS had all CD bracts abscised if exposed to ethylene or at least 97% of CD bracts if not exposed to ethylene.