บทคัดย่องานวิจัย

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1-MCP blocks ethylene-induced petal abscission of Pelargonium peltatum but the effect is transient.

Cameron, A. C. and Reid, M. S.

Postharvest Biology and Technology Year: 2001 Vol: 22 Issue: 2 Pages: 169-177

2000

บทคัดย่อ

1-MCP blocks ethylene-induced petal abscission of Pelargonium peltatum but the effect is transient.

Continuous exposure to 1.5 micro l l-1 ethylene caused 100% petal abscission within 2 h from detached flowers of P. peltatum 'Pink Blizzard' (ivy geranium) harvested just after the stigmatic lobes had separated. When flowering plants were first pre-treated for 2 h with 1 micro l l-1 1-MCP, ethylene-induced petal abscission was completely inhibited. However, the effect was transient, since percent abscission increased with time after 1-MCP treatment. Based on percent abscission from detached flowers after a 2-h ethylene exposure, the half-life of 1-MCP activity was about 2, 3 and 6 days after 1-MCP treatment at 25, 20.7, and 12 deg C, respectively, and there was no evidence for a residual effect after 4 or 5 days at 25 and 20.7 deg C, respectively. A second application of 1-MCP renewed the inhibitory effect. Following 1-MCP treatment, the force required to separate petals from the flower declined linearly with time. The time until complete loss of the inhibitory effect was strongly temperature de

pendent, e.g. approx equal to 1 day at 25 deg C versus 3-4 days at 12 deg C. The use of 1-MCP as a commercial treatment to prevent petal abscission from Pelargonium will depend on shipping and storage temperature and application frequency.