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Effect of Pichia membranaefaciens on ROS metabolism and postharvest disease control in citrus fruit

Institution:	1. College of Food Science, Southwest University, Chongqing 400715, PR China;2. National Food Science and Engineering Experimental Teaching Center, Southwest University, Chongqing 400715, PR China;1. College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, Jiangsu, PR China;2. College of Agriculture, Liaocheng University, Liaocheng 252000, PR China;1. College of Life Science, Jiangsu Normal University, Xuzhou 221116, Jiangsu Province, PR China;2. Guangdong Key Laboratory for Research and Development of Natural Drugs, Department of Pharmacology, Guangdong Medical College, Zhanjiang 524023, Guangdong Province, PR China;3. Department of Food Science, Canadian Research Institute for Food Safety, University of Guelph, Guelph N1G 2W1, ON, Canada;4. Key Laboratory of Protection and Utilization of Biological Resources, College of Life Science, Tarim University, Alar 843300, Xinjiang, PR China;1. Chongqing Key Laboratory of Economic Plant Biotechnology, College of Forestry and Life Science/Institute of Special Plants, Chongqing University of Arts and Sciences, Yongchuan, Chongqing 402160, China;2. Department of Plant Pathology, MOA Key Lab of Pest Monitoring and Green Management, College of Plant Protection, China Agricultural University, Beijing 100193, China;3. Department of Crop Physiology and Cultivation, State Key Laboratory of Plant Physiology and Biochemistry, College of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, China;4. School of Food and Biological Engineering, Hefei University of Technology, Hefei, Anhui 230601, China;1. Institute of Postharvest Technology of Agricultural Products, College of Food Science, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, China;2. Guelph Food Research Center, Agriculture and Agri-Food Canada, Guelph, Ontario N1G 5C9, Canada;1. Centre de Coopération Internationale de Recherche Agronomique pour le Développement (CIRAD), UMR Qualisud, 7 Rue de l’Irat, 97410 Saint-Pierre, Ile de La Réunion, France;2. Laboratoire de Chimie des Substances Naturelles et des Sciences des Aliments, Faculté des Sciences et Technologies, Université de La Réunion, Sainte-Clotilde, Ile de la Réunion, France;3. CIRAD, UMR Qualisud, TA B95/16, 73 rue Jean-François Breton, 34398, Montpellier Cedex 5, France;4. Laboratoire de Chimie des Substances Naturelles et des Sciences des Aliments, Université de La Réunion, ESIROI Agroalimentaire, Parc Technologique, 2 rue Joseph Wetzell, 97490, Sainte-Clotilde, Ile de la Réunion, France;5. CIRAD, UR Fonctionnement Agroécologique et Performances des Systèmes de Culture Horticoles, Station Bassin Plat, BP 180, 97455, Saint Pierre Cedex, Ile de la Réunion, France;1. College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, PR China;2. College of Agriculture, Liaocheng University, Liaocheng 252000, PR China

Abstract:	The yeast Pichia membranaefaciens has antagonistic effects against a wide range of phytopathogenic fungi that cause postharvest fruit decay. This work evaluated the effects of P. membranaefaciens on the reactive oxygen species (ROS) metabolism and disease control in harvested citrus fruit (Citrus sinensis L. Osbeck). The lesion diameter caused by Penicillium italicum and Penicillium digitatum on citrus fruit was remarkably reduced when the fruit was point-inoculated or dipped in a suspension of P. membranaefaciens at 1 × 10⁸ CFU mL^?1. The application of P. membranaefaciens on citrus fruit enhanced the activity of superoxide dismutase, ascorbate peroxidase, and glutathione reductase, as well as the levels of hydrogen peroxide, the superoxide anion and glutathione, but inhibited the decreasing ascorbic acid content. Furthermore, catalase activity was decreased by the same treatment. These results indicated that yeast treatment induced the synthesis of antioxidant enzymes which might have antagonistic effects against postharvest green and blue mold infection in citrus fruit.

Keywords:	Citrus fruit Disease control Reactive oxygen species metabolism superoxide anion hydrogen peroxide SOD"} {"#name":"keyword" "$":{"id":"kwrd0055"} "$$":[{"#name":"text" "_":"superoxide dismutase CAT"} {"#name":"keyword" "$":{"id":"kwrd0065"} "$$":[{"#name":"text" "_":"catalase GR"} {"#name":"keyword" "$":{"id":"kwrd0075"} "$$":[{"#name":"text" "_":"glutathione reductase GSH"} {"#name":"keyword" "$":{"id":"kwrd0085"} "$$":[{"#name":"text" "_":"glutathione APX"} {"#name":"keyword" "$":{"id":"kwrd0095"} "$$":[{"#name":"text" "_":"ascorbate peroxidase AsA"} {"#name":"keyword" "$":{"id":"kwrd0105"} "$$":[{"#name":"text" "_":"ascorbate acid
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