Characterization of symptoms of senescence and chilling injury on inflorescences of Heliconia bihai (L.) cv. Lobster Claw and cv. Halloween |
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| Authors: | Andreza S Costa Luis Carlos Nogueira Venézio F dos Santos Fernando Luiz Finger Terezinha Rangel Camara Vivian Loges Lilia Willadino |
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| Institution: | 1. Laboratory of Floriculture, Department of Agronomy, Federal Rural University of Pernambuco (UFRPE), Dom Manoel de Medeiros, s/n, Recife, PE, CEP: 52171-900, Brazil;2. Embrapa Coastal Tablelands (CPATC), Sergipe, CEP 49025-040, Brazil;3. Agricultural Research Institute of Pernambuco (IPA), CEP 50761-000, Brazil;4. Laboratory of Postharvest, Department of Agricultural Practices, Federal University of Viçosa (UFV), Minas Gerais, CEP 36570-000, Brazil;5. Laboratory of Plant Tissue Culture, Department of Biology, Federal Rural University of Pernambuco (UFRPE), Pernambuco, CEP 52171-900, Brazil;1. Nofima – Norwegian Institute of Food, Fisheries and Aquaculture Research, PB 210, N-1431 Aas, Norway;2. Bioforsk Vest Ullensvang, NO-5781 Lofthus, Norway;1. Universiti Malaysia Terengganu, School of Food Science and Technology, Kuala Terengganu 21030, Terengganu, Malaysia;2. The University of Queensland, School of Agriculture and Food Sciences, Gatton 4343, QLD, Australia;3. Department of Agriculture, Fisheries and Forestry, Level 2C West, Ecosciences Precinct, GPO Box 267, Brisbane 4001, QLD, Australia;4. Institute for Rural Futures, University of New England, Armidale 2351, NSW, Australia;1. INFN, Sezione di Pisa, Largo Bruno Pontecorvo 3, I-56127 Pisa, Italy;2. Dipartimento di Fisica, Universitá di Pisa, Largo Bruno Pontecorvo 3, I-56127 Pisa, Italy;3. European Gravitational Observatory, Via E. Amaldi, I-56021 S. Stefano a Macerata, Cascina, Italy;1. Department of Crop Sciences and Agroforestry, Faculty of Tropical AgriSciences, Czech University of Life Sciences Prague, Kamýcká 129, CZ 165 21 Prague 6 – Suchdol, Czech Republic;2. Department of Forest Ecology, Faculty of Forestry and Wood Sciences, Czech University of Life Sciences Prague, Kamýcká 129, CZ 165 21 Prague 6 – Suchdol, Czech Republic;3. Department of Ecology, Faculty of Environmental Sciences, Czech University of Life Sciences Prague, Kamýcká 129, CZ 165 21 Prague 6 – Suchdol, Czech Republic;1. School of Environmental and Life Sciences, The University of Newcastle, Callaghan, NSW 2308, Australia;2. Faculty of Science and Technology, Kanchanaburi Rajabhat University, Muang District, Kanchanaburi, 7100 Thailand;3. New South Wales Department of Primary Industries, Port Stephens Fisheries Institute, Taylors Beach, NSW 2316, Australia |
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| Abstract: | Inadequate temperatures during the shipping and commercialization of cut tropical flowers may accelerate the senescence process and cause chilling injury, leading to symptoms that have not yet been described for Heliconia bihai. The aim of the present study was to evaluate physiological responses in cut inflorescences of H. bihai cv. Lobster Claw (LC) and cv. Halloween (HW) as well as symptoms of senescence and chilling injury. For such, changes in fresh weight, bract color (L*, a* and b*), percentage of absolute integrity (PAI) of cell membranes and leakage of potassium ions (LPI) were determined. The flowering stems were evaluated at five different intervals after harvest (0, 2, 4, 6 and 8 d). A refrigerated treatment (RT) with a temperature of 6.5 °C and 85% relative humidity was compared to a control treatment (CT) at room temperature of 24 °C and 66% relative humidity. Both cultivars stored at 6.5 °C exhibited dryness of bract tissue (symptom of senescence) and dark stains that became brownish and evolved to necrosis (symptom of chilling injury). The visual quality of inflorescences decreased with time in both cultivars maintained without refrigeration. The severity of chilling injury increased with the length of storage time in both cultivars. There was a significant reduction in the fresh weight of inflorescences in both treatments (RT and CT) and both cultivars (LC and HW). Bract color changed in both cultivars at 6.5 °C. There was no change in PAI throughout the evaluation period in the inflorescences stored at room temperature, whereas those stored at 6.5 °C for 6 and 8 d had lower PAI values. The inflorescences in the control treatment underwent no change in LPI values, whereas those stored under refrigeration had increased LPI values after the sixth day of storage. The physiological responses of cut Heliconia flowers were influenced by storage period and temperature, as demonstrated by visual symptoms of chilling injury and senescence. |
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