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1-Methyl cyclopropene extends postharvest life of spinach leaves
Authors:Gustavo Gergoff Grozeff  María E Micieli  Facundo Gómez  Laura Fernández  Juan J Guiamet  Alicia R Chaves  Carlos G Bartoli
Institution:1. Instituto de Fisiología Vegetal, Universidad Nacional de La Plata-CCT CONICET La Plata, cc327 (1900) La Plata, Argentina;2. Centro de Investigación y Desarrollo en Criotecnología de Alimentos, Facultad de Ciencias Exactas, Universidad Nacional de La Plata-CCT CONICET La Plata, 47 y 116 (1900) La Plata, Argentina;1. Horticultural Sciences Department, IFAS, University of Florida, Gainesville, FL 32611-0690, USA;2. College of Horticulture, Northwest A&F University, Yangling, Shaanxi Province 712100, China;3. Environment and Plant Protection Institute, Chinese Academy of Tropical Agricultural Sciences, Danzhou 571737, China;4. National Horticultural Research Institute, Rural Development Administration, 475 Imok-Dong, Jangan-Gu, Suwon 440-706, Republic of Korea;1. Department of Environmental Sciences, Faculty of Agriculture, Dalhousie University, Truro, NS B2B 5E3, Canada;2. Atlantic Food and Horticulture Research Centre, Agriculture and Agri-Food Canada, 32 Main Street, Kentville, Nova Scotia B4N IJ5, Canada;3. Acadian Seaplants Limited, 30 Brown Avenue, Dartmouth, NS B3B 1X8, Canada;1. College of Food and Bioengineering, Zhengzhou University of Light Industry, Zhengzhou, Henan, 450002, China;2. Department of Horticulture, Oregon State University, Mid-Columbia Agricultural Research and Extension Center, 3005 Experiment Station Drive, Hood River, OR, 97031, USA;1. Center for Plant Aging Research, Institute for Basic Science (IBS), Daegu, 42988, Republic of Korea;2. Department of New Biology, DGIST, Daegu, 42988, Republic of Korea
Abstract:Senescence of detached spinach leaves either untreated or treated with 0.1 or 1.0 μL L?1 1-MCP has been investigated. 1-MCP treated leaves had higher chlorophyll content and photosystem II potential quantum yield (Fv/Fm) and lower solute leakage than untreated leaves after storage in darkness at 23 °C for 6 d, indicating a delay of senescence. Ethylene production was increased in spinach supplemented with 1-MCP after 3 d storage and then declined to the rates of untreated leaves. 1-MCP treated spinach had higher ascorbic acid and glutathione concentrations, and a low oxidised/reduced ratio for both antioxidants. Accumulations of ammonium and protein degradation were reduced by 1-MCP. The results presented here indicate that inhibition of ethylene sensitivity can be successfully used to extend the postharvest life of spinach leaves.
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