ศูนย์นวัตกรรมเทคโนโลยีหลังการเก็บเกี่ยว

Comparison of postharvest properties of closely related miniature rose cultivars (Rosa hybrida L.).

Muller, R., Stummann, B. M. and Andersen, A. S.

Scientia Horticulturae. Volume 91, Issues 3-4, December 2001, Pages 325-337.

2001

บทคัดย่อ

The miniature rose cultivar Vanilla Kordana is a useful genetic resource for improving display life and ethylene resistance of miniature potted roses. To investigate the significance of ethylene production and sensitivity in determining display life, two mutants (Goldy and Safari), selected based on external traits, and one offspring (Champagner) of Vanilla, were analysed. All cultivars exhibited a shorter postharvest life and higher ethylene sensitivity than Vanilla Kordana. The cultivar Amber, which was crossed with Vanilla Kordana to produce Champagner, had the shortest display life of the investigated cultivars and was highly ethylene sensitive. In response to exogenous ethylene, Vanilla Kordana and related cultivars exhibited differences in display life, chlorophyll loss, and leaf and bud drop. The two mutants had a higher ethylene production than Vanilla Kordana, suggesting that this is the main reason for their shorter flower life. Vanilla Kordana and the mutants did not show autocatalytic stimulation of ethylene production. The ethylene production in Champagner, which results from crossing of Vanilla Kordana and Amber, was lower than in parents and mutants. Ethylene exposure induced increased ethylene production in leaves and partly in flowers of the cultivars Amber and Champagner. This autocatalytic ethylene production may be a major reason for the short display life of these two cultivars. Results indicate that the initial ethylene production and the degree of autocatalytic stimulation are the major factors determining display life.