Amin Mirshekari1, Babak Madani2, Elhadi M Yahia3, John B Golding4, Shokrollah Haji Vand5. 1. Department of Agronomy and Plant Breeding, Faculty of Agriculture, University of Yasouj, Yasouj, Iran. 2. Horticultural Crops Research Department, Natural Resources Research and Education Center of Hormozgan, Agricultural Research, Education and Extension Organization, Bandar Abbas, Iran. 3. Facultad de Ciencias Naturales, Universidad Autónoma de Querétaro, Querétaro, Mexico. 4. NSW Department of Primary Industries, Gosford, NSW, Australia. 5. Horticultural Science Research Institute, Agricultural Research, Education and Extension Organization, Karaj, Iran.
Abstract
BACKGROUND: Sapota is a popular tropical fruit characterized by a very short postharvest life. Low-temperature storage prolongs postharvest life of sapota fruit, but chilling injury symptoms can develop if the storage temperature is less than 14 °C. There have been no reports on the effects of postharvest melatonin application on the development of chilling injury in sapota fruit during cold storage. The objective of this study was to investigate the effects of different concentrations of postharvest melatonin application (0, 30, 60 and 90 μmol L-1 ) during cold storage (8 °C) for up to 30 days with an additional 1-day shelf life at ambient temperature. RESULTS: All melatonin treatments reduced chilling injury symptoms, reduced electrolyte leakage, malondialdehyde (MDA) content, H2 O2 and superoxide anion (O2 - ), and increased proline content and the activity of superoxide dismutase (SOD), catalase (CAT) and γ-aminobutyric acid (GABA), and reduced the activities of phospholipase D (PLD) and lipoxygenase (LOX) compared to the control. CONCLUSION: Postharvest melatonin treatment could be a useful strategy for reducing chilling injury during cold storage and transport of sapota fruit. The results indicate that melatonin reduces chilling injury of sapota fruit through maintaining membrane integrity, SOD and CAT activities, and reducing PLD and LOX activities.
BACKGROUND: Sapota is a popular tropical fruit characterized by a very short postharvest life. Low-temperature storage prolongs postharvest life of sapota fruit, but chilling injury symptoms can develop if the storage temperature is less than 14 °C. There have been no reports on the effects of postharvest melatonin application on the development of chilling injury in sapota fruit during cold storage. The objective of this study was to investigate the effects of different concentrations of postharvest melatonin application (0, 30, 60 and 90 μmol L-1 ) during cold storage (8 °C) for up to 30 days with an additional 1-day shelf life at ambient temperature. RESULTS: All melatonin treatments reduced chilling injury symptoms, reduced electrolyte leakage, malondialdehyde (MDA) content, H2 O2 and superoxide anion (O2 - ), and increased proline content and the activity of superoxide dismutase (SOD), catalase (CAT) and γ-aminobutyric acid (GABA), and reduced the activities of phospholipase D (PLD) and lipoxygenase (LOX) compared to the control. CONCLUSION: Postharvest melatonin treatment could be a useful strategy for reducing chilling injury during cold storage and transport of sapota fruit. The results indicate that melatonin reduces chilling injury of sapota fruit through maintaining membrane integrity, SOD and CAT activities, and reducing PLD and LOX activities.
Authors: Sameer H Qari; Muhammad Umair Hassan; Muhammad Umer Chattha; Athar Mahmood; Maria Naqve; Muhammad Nawaz; Lorenzo Barbanti; Maryam A Alahdal; Maha Aljabri Journal: Front Plant Sci Date: 2022-03-14 Impact factor: 5.753
Authors: Lívia Muritiba Pereira de Lima Coimbra; Adrielle Zagmignan; Paulo Victor Vieira Gomes; Jânaira Farias Araujo; Gabrielle Damasceno Costa Dos Santos; Rita de Cássia Mendonça de Miranda; Silvana Magalhães Salgado; Samara Alvachian Cardoso Andrade; Luís Cláudio Nascimento da Silva Journal: Foods Date: 2022-03-10