บทคัดย่องานวิจัย

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Ethylene, ABA, and 1-MCP in flower senescence and abscission

Donald Hunter

Proceedings of 26th International Horticultural Congress. Volume of Abstract . Toronto, Canada, 11-17 August, 2002. p. 253.

2002

บทคัดย่อ

Ethylene, ABA, and 1-MCP in Flower Senscence and Abscission

The wilting and abscission that results from exposure of flowers to ethylene is now commercially controlled by application of 1-MCP. However, only some floricultural crops show ‘ethylene-dependent’ senescence. For many others, natural senescence appears to proceed independently of the action of ethylene, so that 1-MCP has a minimal effect on the natural longevity of the flowers. Daffodil (Narcissus pseudonarcissus L.) is a good example of this latter response. Daffodil flowers held in air last almost as long as 1-MCP treated flowers, but when they are exposed to low concentrations of ethylene (as little as 30 ppb), they senesce prematurely. Daffodil flowers treated with ABA also senesce rapidly, but senescence is not prevented by 1-MCP pre-treatment. Senescence of Alstroemeria flowers is associated with water-soaking of the petals and petal abscission. Treatment with ABA stimulated both these responses. Although 1-MCP pre-treatment prevented petal abscission in ABA-treated flowers, it was unable to delay the acceleration of water soaking. Treatment with 1-MCP allows the separate roles of ABA and ethylene in flower senescence to be distinguished.