Pre-harvest application of oxalic acid increases quality and resistance to Penicillium expansum in kiwifruit during postharvest storage. (1st January 2016)

• Record Type: Journal Article
• Authors: Zhu, Yuyan; Yu, Jie; Brecht, Jeffrey K.; Jiang, Tianjia; Zheng, Xiaolin
• Is Part Of: Food chemistry. Volume 190(2016)
• Page Start: 537
• Page End: 543
• Publication Date: 2016-01-01
• Subjects: Disease resistance -- Kiwifruit -- Oxalic acid -- Penicillium expansum -- Preharvest spraying -- Patulin -- Storage; Food -- Analysis -- Periodicals; Food -- Composition -- Periodicals; 664
• DOI: 10.1016/j.foodchem.2015.06.001
• Languages: English
• ISSNs: 0308-8146

Abstract

Highlights: First report on pre-OA treatment increased quality in postharvest kiwifruit. First report on pre-OA treatment enhanced resistance in postharvest kiwifruit. Supplied further evidence of pre-OA treatment against Penicillium expansum . Abstract: Kiwifruit ( Actinidia deliciosa cv. Bruno) fruits were sprayed with 5 mM 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.