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Effectiveness of submicron chitosan dispersions in controlling anthracnose and maintaining quality of dragon fruit
Affiliation:1. Centre of Excellence for Postharvest Biotechnology (CEPB), School of Biosciences, The University of Nottingham Malaysia Campus, Semenyih, 43500 Selangor D. E., Malaysia;2. Department of Chemical and Environmental Engineering, Faculty of Engineering, The University of Nottingham Malaysia Campus, 43500 Semenyih, Selangor, Malaysia;3. Laboratory of Food Crops and Floriculture, Institute of Tropical Agriculture, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia;4. School of Biosciences, The University of Nottingham, Sutton Bonington Campus, Loughborough, Leicestershire LE12 5RD, UK;1. Food Technology, School of Agricultural Technology, Walailak University, Nakhon Si Thammarat, 80160, Thailand;2. Green Innovation in Physics for Agro-Industry Research Center of Excellence, Walailak University, Nakhon Si Thammarat, 80160, Thailand;3. Plasma Agricultural Application Laboratory, School of Science, Walailak University, Nakhon Si Thammarat, 80160, Thailand;1. Center of Excellence in Environment and Plant Physiology, Department of Botany, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand;2. Metallurgy and Materials Science Research Institute, Chulalongkorn University, Bangkok 10330, Thailand
Abstract:Conventional chitosan (CC) and submicron chitosan dispersions (SCD) were evaluated for the control of postharvest anthracnose and maintenance of quality of dragon fruit during storage at 10 ± 2 °C and 80 ± 5% RH for 28 days. All the chitosan treatments significantly reduced anthracnose symptoms, resulting in a reduction of disease development and thereby maintained the quality of fresh fruit for extended periods. SCD at 1.0% with 600 nm droplet size gave the best result in that it delayed the onset of disease and maintained the quality of dragon fruit for up to 28 days of storage. It can be concluded from the present investigation that SCD have potential to be used as an antifungal agent to control postharvest anthracnose and maintain quality of dragon fruit during storage.
Keywords:Antioxidant activity  Postharvest quality  Respiration
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