1-MCP partially alleviates dehydration-induced abscission in cut leaves of the fern Nephrolepis cordifolia |
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| Authors: | Saowalak Banthoengsuk Saichol Ketsa Wouter G. van Doorn |
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| Affiliation: | 1. Department of Horticulture, Kasetsart University, Bangkok 10900, Thailand;2. Postharvest Technology Innovation Center, Thailand;3. Mann Laboratory, Department of Plant Sciences, University of California, Davis, CA 95616, USA;1. Department of Horticulture, Faculty of Agriculture, Kasetsart University, Bangkok 10900, Thailand;2. Postharvest Technology Innovation Center, Commission on Higher Education, Bangkok 10400, Thailand;3. Academy of Science, The Royal Institute, Dusit, Bangkok 10300, Thailand;4. Mann Laboratory, Department of Plant Sciences, University of California, Davis, CA 95616, USA;1. Department of Horticulture, Faculty of Agriculture, Kasetsart University, Bangkok 10900, Thailand;2. Department of Horticulture, Faculty of Agriculture at Kamphaeng Saen, Kasetsart University, Kamphaeng Saen Campus, Nakhon Pathom 73140, Thailand;3. Academy of Science, The Royal Society of Thailand, Dusit, Bangkok 10300, Thailand;4. Mann Laboratory, Department of Plant Sciences, University of California, Davis, CA 95616, USA;1. Institut de Biologie Intégrative et des Systèmes, Pavillon Charles-Eugène-Marchand, Université Laval, Quebec City, QC, Canada;2. Centre de recherche de l’Institut universitaire de cardiologie et de pneumologie de Québec, Hôpital Laval, Quebec City, QC, Canada;3. Département de biochimie, de microbiologie et de bio-informatique, Faculté des sciences et de génie, Université Laval, Quebec City, QC, Canada;1. Mann Laboratory, Department of Plant Sciences, University of California, Davis, CA 95616, USA;2. Khon Kaen Field Crops Research Center, Amphur Muang, Khon Kaen 40000, Thailand;3. Department of Horticulture, Faculty of Agriculture, Kasetsart University, Bangkok Campus, Bangkok 10900, Thailand;4. Academy of Science, The Royal Institute, Dusit, Bangkok 10300, Thailand;1. Department of Horticulture, Faculty of Agriculture, Kasetsart University, Bangkok 10900, Thailand;2. Academy of Science, The Royal Society, Dusit, Bangkok 10300, Thailand;3. Mann Laboratory, Department of Plant Sciences, University of California, Davis, CA 95616, USA |
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| Abstract: | Fern leaves, also called fronds, are often used in bouquets. Leaves of the sword fern (Nephrolepis cordifolia) consist of a central vascular tissue, with numerous leaflets (pinnae) at each side. Leaves that have been cut and immediately placed in water show abscission of the pinnae, starting from about day 4 of vase life, with 50% pinnae abscission on day 13. The onset of pinnae abscission was hastened by a period of dehydration (3, 6, 9 or 12 h at 25 °C). The time to 50% pinnae abscission was between 7.0 and 4.7 days after 3 h and 12 h of dehydration, respectively. Dehydration treatments might induce air emboli in the xylem, but in these experiments did not inhibit water uptake. Dehydration did increase the rate of ethylene production of the cut leaves throughout vase life. A 3 h treatment with 1-MCP at concentrations of 200 or 300 nL L?1 prior to the period of dehydration reduced the rate of ethylene production and reduced the rate of abscission. 1-MCP treatments were also effective if given after the period of dehydration. The data show that pinnae abscission limits the vase life of cut leaves of the sword fern, and that a short period of water stress drastically increases the rate of abscission. The increase in pinnae abscission was correlated with an increase in ethylene production. As 1-MCP alleviated the effect of dehydration on pinnae abscission, the dehydration effect involved ethylene perception. The data suggest that a small water stress induced an autocatalytic rise in ethylene production which was the direct cause of the increase in pinnae abscission. |
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