Effects of ethylene and cytokinins on vase life of cut Eucalyptus parvifolia Cambage branches
A. Ferrante, A. Mensuali-Sodi, G. Serra and F. Tognoni
Plant Growth Regulation 38 (2): 119-125.
2002
บทคัดย่อ
Effects of ethylene and cytokinins on vase life of cut Eucalyptus parvifolia Cambage branchesThe role of ethylene and cytokinins was investigated during postharvestsenescence of cut Eucalyptus parvifolia Cambage branches.The effect of endogenous and exogenous ethylene on the vase life of the cutbranches was studied using 2 mM 1-aminocyclopropane-1-carboxylicacid (ACC) as a continuous treatment or “pulse” treatment for 48h with 20, 40 and 80 ml l–1ethylene. Both endogenous and exogenous ethylene reduced the vase life of thebranches; however, the effect of the endogenous hormone was stronger than theexogenous applications. Ethylene biosynthesis was inhibited by pulse treatmentfor 24 h using 1 mM AOA or 2 mMCoCl2. The latter treatment significantly extended the vase life ofthe branches by delaying senescence. The effect of cytokinins was evaluated onthe vase life of cut E. parvifolia branches by pulsetreatment for 24 h with 10, 50 and 100 mM thidiazuron (TDZ) or 85, 130 and 260 mM N6-benzyladenine (BA). The resultsobtained showed that no response was observed following pulse treatment with BAwhile, although TDZ had little effect on vase life, it was a good inhibitor ofchlorophyll degradation.