title: Changes in energy metabolism accompanying pitting in blueberries stored at low temperature.
abstract: Low-temperature storage and transport of blueberries is widely practiced in commercial blueberry production. In this research, the storage life of blueberries was extended at low temperature, but fruit stored for 30 d at 0°C pitted after 2d at room-temperature. Fruit cellular structure and physiological parameters accompanying pitting in blueberries were changed. The objective of this research was to characterise properties of energy metabolism accompanying pitting in blueberries during storage, including adenosine phosphates and mitochondrial enzymes involved in stress responses. Physiological and metabolic disorders, changes in cell ultrastructure, energy content and ATPase enzyme activity were observed in pitting blueberries. Energy shortages and increased activity of phenylalanine ammonia lyase (PAL) and lipoxygenase (LOX) were observed in fruit kept at shelf life. The results suggested that sufficient available energy status and a stable enzymatic system in blueberries collectively contribute to improve chilling tolerance, thereby alleviating pitting and maintaining quality of blueberry fruit in long-term cold storage.
authors.affiliation: Department of Food Science, Shenyang Agricultural University, Shenyang 110866, People's Republic of China.
authors.forename: Qian
authors.initials: Q
authors.lastname: Zhou
authors.affiliation: Department of Food Science, Shenyang Agricultural University, Shenyang 110866, People's Republic of China.
authors.forename: Chunlei
authors.initials: C
authors.lastname: Zhang
authors.affiliation: Department of Food Science, Shenyang Agricultural University, Shenyang 110866, People's Republic of China.
authors.forename: Shunchang
authors.initials: S
authors.lastname: Cheng
authors.affiliation: Department of Food Science, Shenyang Agricultural University, Shenyang 110866, People's Republic of China.
authors.forename: Baodong
authors.initials: B
authors.lastname: Wei
authors.affiliation: Department of Food Science, Shenyang Agricultural University, Shenyang 110866, People's Republic of China.
authors.forename: Xiuying
authors.initials: X
authors.lastname: Liu
authors.affiliation: Department of Food Science, Shenyang Agricultural University, Shenyang 110866, People's Republic of China. Electronic address: jsjsyau@sina.com.
authors.forename: Shujuan
authors.initials: S
authors.lastname: Ji
mesh_terms: D029798:Blueberry Plants / Q000378:metabolism* / Q000648:ultrastructure; D000252:Calcium-Transporting ATPases / Q000378:metabolism; D003080:Cold Temperature; D004734:Energy Metabolism; D005519:Food Preservation; D010650:Phenylalanine Ammonia-Lyase / Q000378:metabolism; D006180:Proton-Translocating ATPases / Q000378:metabolism
chemical_list: D006180:Proton-Translocating ATPases; D010650:Phenylalanine Ammonia-Lyase; D000252:Calcium-Transporting ATPases
keywords: Blueberry; Energy metabolism; Pitting; Storage