บทคัดย่องานวิจัย

หมวดหมู่ : ฐานข้อมูลงานวิจัย

Is vascular blockage in stems of cut lilac flowers mediated by ethylene?

Doorn, W. G. van; Harkema, H.; Otma, E.;

Acta Horticulturae Year: 1991 Issue: No. 298 Pages: 177-181 Ref: 5 ref.

1991

บทคัดย่อ

Is vascular blockage in stems of cut lilac flowers mediated by ethylene?

Flowering stems of lilac (Syringa vulgaris) were placed individually in deionized water containing hydroxyquinoline citrate (HQC) (200 or 400 mg/litre), sodium dichlorocyanuric acid (DICA) (100 or 200 mg/litre), silver thiosulphate (STS) (0.02 or 0.05 mM) or aminoethoxyvinylglycine (AVG) (0.02 mM) at 20 deg C, 60% RH and a photosynthetically active quantum flux of 15 micro mol m-2 s-1 for 12 h/day. Some stems were placed in AgNO3 (700 or 1400 mg/litre) for 30 min and then placed in deionized water. DICA, HQC and AgNO3 prevented low hydraulic conductance in the basal 10 cm stem segment which was related to a decrease in the number of bacteria in the basal 5 cm segment. HQC and AgNO3 also prevented low hydraulic conductance in the 10-12 cm stem segment. Inhibitors of ethylene synthesis (HQC and AVG) and inhibitors of ethylene action (AgNO3 and STS) delayed the time to wilting, indicating that ethylene plays a role in the development of occlusion in cut lilac stems. The 10-20 cm segment of control stems contained several tyloses. Tylose formation was suppressed by HQC and AVG, indicating that tylose formation may be regulated by ethylene.