title: Pre-harvest application of oxalic acid increases quality and resistance to Penicillium expansum in kiwifruit during postharvest storage.
abstract: Kiwifruit (Actinidia deliciosa cv. Bruno) fruits were sprayed with 5mM oxalic acid (OA) at 130, 137, and 144 days after full blossom, and then harvested at commercial maturity [soluble solid content (SSC) around 10.0%] and stored at room temperature (20 ± 1 °C). Pre-harvest application of OA led to fruit with higher ascorbic acid content at harvest, slowed the decreases in fruit firmness and ascorbic acid content and increase in SSC during storage, and also decreased the natural disease incidence, lesion diameter, and patulin accumulation in fruit inoculated with Penicillium expansum, indicating that the OA treatment increased quality and induced disease resistance in kiwifruit. It was suggested that the increase in activities of defense-related enzymes and in levels of substances related to disease resistance might collectively contribute to resistance in kiwifruit against fungi such as P. expansum in storage.
authors.affiliation: College of Food Science and Biotechnology, Key Laboratory of Fruits and Vegetables Postharvest and Processing Technology Research of Zhejiang Province, Zhejiang Gongshang University, Hangzhou 310018, PR China.
authors.forename: Yuyan
authors.initials: Y
authors.lastname: Zhu
authors.affiliation: College of Food Science and Biotechnology, Key Laboratory of Fruits and Vegetables Postharvest and Processing Technology Research of Zhejiang Province, Zhejiang Gongshang University, Hangzhou 310018, PR China.
authors.forename: Jie
authors.initials: J
authors.lastname: Yu
authors.affiliation: Horticultural Sciences Department, IFAS, University of Florida, Gainesville, FL 32611-0690, USA.
authors.forename: Jeffrey K
authors.initials: JK
authors.lastname: Brecht
authors.affiliation: College of Food Science and Biotechnology, Key Laboratory of Fruits and Vegetables Postharvest and Processing Technology Research of Zhejiang Province, Zhejiang Gongshang University, Hangzhou 310018, PR China.
authors.forename: Tianjia
authors.initials: T
authors.lastname: Jiang
authors.affiliation: College of Food Science and Biotechnology, Key Laboratory of Fruits and Vegetables Postharvest and Processing Technology Research of Zhejiang Province, Zhejiang Gongshang University, Hangzhou 310018, PR China. Electronic address: zheng9393@163.com.
authors.forename: Xiaolin
authors.initials: X
authors.lastname: Zheng
mesh_terms: D029042:Actinidia / Q000737:chemistry*; D061353:Food Storage / Q000379:methods*; D005638:Fruit / Q000737:chemistry*; D019815:Oxalic Acid / Q000737:chemistry*; D010365:Patulin / Q000737:chemistry*; D010407:Penicillium / Q000737:chemistry*
chemical_list: D010365:Patulin; D019815:Oxalic Acid
keywords: Disease resistance; Kiwifruit; Oxalic acid; Patulin; Penicillium expansum; Preharvest spraying; Storage