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BMC Plant Biol

Title:		Metabolome and transcriptome profiling revealed the enhanced synthesis of volatile esters in Korla pear
Author(s):		Liu Y; Wen H; Yang X; Wu C; Ming J; Zhang H; Chen J; Wang J; Xu J;
Address:		"National Key Laboratory for Germplasm Innovation & Utilization of Horticultural Crops, College of Horticulture and Forestry Sciences, Huazhong Agricultural University, Wuhan, 430070, China. Sensory Evaluation and Quality Analysis Centre of Horticultural Products, Huazhong Agricultural University, Wuhan, 430070, China. Institute of Fruit and Tea, Hubei Academy of Agricultural Sciences, Wuhan, 430064, China. The National and Local Joint Engineering Laboratory of High Efficiency and Superior-Quality Cultivation and Fruit Deep Processing Technology of Characteristic Fruit Trees in Southern Xinjiang, College of Horticulture and Forestry, Tarim University, Alar, 843300, China. Xinjiang Production and Construction Corps Key Laboratory of Biological Resources Protection and Utilization in Tarim Basin, Alar, 843300, China. Ganzhou Agricultural Technology Extension Center, Ganzhou, 341000, China. The National and Local Joint Engineering Laboratory of High Efficiency and Superior-Quality Cultivation and Fruit Deep Processing Technology of Characteristic Fruit Trees in Southern Xinjiang, College of Horticulture and Forestry, Tarim University, Alar, 843300, China. wjbok@126.com. Xinjiang Production and Construction Corps Key Laboratory of Biological Resources Protection and Utilization in Tarim Basin, Alar, 843300, China. wjbok@126.com. National Key Laboratory for Germplasm Innovation & Utilization of Horticultural Crops, College of Horticulture and Forestry Sciences, Huazhong Agricultural University, Wuhan, 430070, China. xujuan@mail.hzau.edu.cn. Sensory Evaluation and Quality Analysis Centre of Horticultural Products, Huazhong Agricultural University, Wuhan, 430070, China. xujuan@mail.hzau.edu.cn"
Journal Title:		BMC Plant Biol
Year:		2023
Volume:		20230519
Issue:		1
Page Number:		264 -
DOI:		10.1186/s12870-023-04264-1
ISSN/ISBN:		1471-2229 (Electronic) 1471-2229 (Linking)
Abstract:		"BACKGROUND: Flavor contributes to the sensory quality of fruits, including taste and aroma aspects. The quality of foods is related to their flavor-associated compounds. Pear fruits have a fruity sense of smell, and esters are the main contributor of the aroma. Korla pear are well known due to its unique aroma, but the mechanism and genes related to volatile synthesis have not been fully investigated. RESULTS: Flavor-associated compounds, including 18 primary metabolites and 144 volatiles, were characterized in maturity fruits of ten pear cultivars from five species, respectively. Based on the varied metabolites profiles, the cultivars could be grouped into species, respectively, by using orthogonal partial least squares discrimination analysis (OPLS-DA). Simultaneously, 14 volatiles were selected as biomarkers to discriminate Korla pear (Pyrus sinkiangensis) from others. Correlation network analysis further revealed the biosynthetic pathways of the compounds in pear cultivars. Furthermore, the volatile profile in Korla pear throughout fruit development was investigated. Aldehydes were the most abundant volatiles, while numerous esters consistently accumulated especially at the maturity stages. Combined with transcriptomic and metabolic analysis, Ps5LOXL, PsADHL, and PsAATL were screened out as the key genes in ester synthesis. CONCLUSION: Pear species can be distinguished by their metabolic profiles. The most diversified volatiles as well as esters was found in Korla pear, in which the enhancement of lipoxygenase pathway may lead to the high level of volatile esters at maturity stages. The study will benefit the fully usage of pear germplasm resources to serve fruit flavor breeding goals"
Keywords:		*Pyrus Esters/metabolism Plant Breeding Fruit Metabolome Gene Expression Profiling *Volatile Organic Compounds/metabolism Esters biosynthetic genes Flavor Opls-da Primary metabolites Volatiles 'Korla pear' (Pyrus sinkiangensis);
Notes:		"MedlineLiu, Yuan Wen, Huan Yang, Xiaoping Wu, Cuiyun Ming, Jiaqi Zhang, Hongyan Chen, Jiajing Wang, Jiangbo Xu, Juan eng 2017DB006/the Major Scientific and Technological Projects of XPCC/ England 2023/05/19 BMC Plant Biol. 2023 May 19; 23(1):264. doi: 10.1186/s12870-023-04264-1"