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Food Chem

Title:		Methyl jasmonate pretreatment improves aroma quality of cold-stored 'Nanguo' pears by promoting ester biosynthesis
Author(s):		Luo M; Zhou X; Hao Y; Sun H; Zhou Q; Sun Y; Ji SJ;
Address:		"Department of Food Science, Shenyang Agricultural University, Shenyang 110866, PR China. Liao Ning Institute of Pomology, Yingkou 115009, PR China. Department of Food Science, Shenyang Agricultural University, Shenyang 110866, PR China. Electronic address: jsjsyau@syau.edu.cn"
Journal Title:		Food Chem
Year:		2021
Volume:		20200818
Issue:
Page Number:		127846 -
DOI:		10.1016/j.foodchem.2020.127846
ISSN/ISBN:		1873-7072 (Electronic) 0308-8146 (Linking)
Abstract:		"Cold storage is widely used for delaying ripening and senescence; however, fruit aroma diminishes noticeably after long-term cold storage. The esters synthesized by the lipoxygenase (LOX) pathway are responsible for 'Nanguo' pear aroma. As methyl jasmonate (MeJA) is known to act on various fruit qualities, we investigated whether it acts via the LOX pathway in cold-stored 'Nanguo' pears. MeJA treatment increased the content of volatile esters and unsaturated fatty acids and the activities of alcohol acyltransferase, alcohol dehydrogenase, and LOX. It also up-regulated the expression of key genes (PuAAT, PuADH3, PuADH5, PuADH9, PuLOX1, and PuLOX3) in the LOX pathway and that of transcription factors (PuMYB21-like, PuMYB108-like, PuWRKY61, PuWRKY72, and PuWRKY31), whose genes were differentially expressed in preliminary transcriptome analysis. Therefore, considering its effects on LOX pathway-related genes and transcription factors, MeJA may be useful in preventing cold-storage-induced decline in ester biosynthesis, aroma, and consequently the quality of cold-stored 'Nanguo' pears"
Keywords:		"Acetates/*pharmacology Cyclopentanes/*pharmacology Esters/*metabolism Fatty Acids, Unsaturated/analysis Food Storage/*methods Fruit/chemistry/drug effects/metabolism Gene Expression Regulation, Plant/drug effects Lipoxygenase/genetics/metabolism Oxylipins;"
Notes:		"MedlineLuo, Manli Zhou, Xin Hao, Yi Sun, Huajun Zhou, Qian Sun, Yangyang Ji, Shu-Juan eng England 2020/08/25 Food Chem. 2021 Feb 15; 338:127846. doi: 10.1016/j.foodchem.2020.127846. Epub 2020 Aug 18"