บทคัดย่องานวิจัย

หมวดหมู่ : ฐานข้อมูลงานวิจัย

Flower longevity and ethylene production in different development stages and treatments in Lilium.

Burchi G., Ferrante A., Nesi B., Grassotti A., Mensuali-Sodi A.

5th International Postharvest Symposium . Volume of Abstract . Verona, Italy 6-11 June 2004, p36.

2004

บทคัดย่อ

Flower longevity and ethylene production in different development stages and treatments in Lilium.  Many studies were carried out o­n cut flower senescence in Lilium.The published data are often controversial.Some authors and flower auction systems recommend the growers to treat lilies with ethylene antagonists before commercialization.Other experiments indicated that ethylene inhibitions do not improve flower longevity, suggesting that the role of ethylene in cut lilies senescence has limited importance.Other authors demonstrated that cut lilies stored at 4 °C before commercialisation have longer vase life when treated with ethylene antagonists

In this work, flower longevity and ethylene evolution were measured both in intact flowers (from stems left o­n the plant or placed in water immediately after harvest) and in separated organs (tepals, pistils, stamens and leaves).Asiatic hybrids (cvs. Elite and Prato) were soil-grown in the Research Station of Pescia (Italy).Stems were harvested at a stage where the first bud was fully coloured and within 2 days of opening.At the same stage, some flowers were labeled and left o­n the plant.

The vase life of cut stems was 9.2 and 9.0 days, in Prato and Elite respectively, and blasting or uncomplete opening of apical buds was observed.A longer life (13-14 days) and a completer development of all flowers was observed in attached stems.The ethylene production was low during the first stages of flower development (0.4-0.7 nl g-1 h-1) and increased during senescence (3.2-3.5 and 1.3-1.5 nl g-1 h-1 at the end of vase life in Elite and Prato respectively), but no climacteric peak was observed.The ethylene production was higher in attached than in detached flowers in Elite.Ethylene production measured in separated organs showed that the pistils produce higher levels at bud stage and that release decreases during development.