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J Agric Food Chem

Title:		Citrus mangshanensis Pollen Confers a Xenia Effect on Linalool Oxide Accumulation in Pummelo Fruit by Enhancing the Expression of a Cytochrome P450 78A7 Gene CitLO1
Author(s):		Zhang H; Liu C; Yao JL; Deng CH; Chen S; Chen J; Wang Z; Yu Q; Cheng Y; Xu J;
Address:		"Key Laboratory of Horticultural Plant Biology (Ministry of Education), College of Horticulture and Forestry , Huazhong Agricultural University , Wuhan 430070 , P. R. China. College of Horticulture , Northwest A&F University , Yangling , Shaanxi 712100 , P. R. China. The New Zealand Institute for Plant & Food Research Limited , Private Bag 92169 , Auckland 1142 , New Zealand. Agricultural Bureau of Yichang District , Yiling 443310 , P. R. China"
Journal Title:		J Agric Food Chem
Year:		2019
Volume:		20190815
Issue:		34
Page Number:		9468 - 9476
DOI:		10.1021/acs.jafc.9b03158
ISSN/ISBN:		1520-5118 (Electronic) 0021-8561 (Linking)
Abstract:		"The aroma quality of citrus fruit is determined by volatiles that are present at extremely low levels in the citrus fruit juice sacs; it can be greatly improved by increasing volatiles. In this study, we showed that the contents of cis- and trans-linalool oxides were significantly increased in the juice sacs of three pummelos artificially pollinated with the Citrus mangshanensis (MS) pollen. A novel cytochrome P450 78A7 gene (CitLO1) was significantly upregulated in the juice sacs of Huanong Red pummelo pollinated with MS pollen in comparison to that with open pollination. Compared to wild-type tobacco Bright-Yellow2 cells, transgenic cells overexpressing CitLO1 promoted a 3- to 4-fold more conversion of (-)-linalool to cis- and trans-linalool oxides. Overall, our results suggest that MS pollen has a xenia effect on pummelo fruit aroma quality, and CitLO1 is a linalool oxide synthase gene that played an important role in the xenia effect"
Keywords:		Acyclic Monoterpenes Citrus/chemistry/genetics/*metabolism Cyclohexanols/*metabolism Cytochrome P-450 Enzyme System/*genetics/metabolism Fruit/chemistry/genetics/*metabolism Humans Monoterpenes/*metabolism Odorants/analysis Plant Proteins/*genetics/metabo;
Notes:		"MedlineZhang, Haipeng Liu, Cuihua Yao, Jia-Long Deng, Cecilia Hong Chen, Shilin Chen, Jiajing Wang, Zhenhua Yu, Qiaoming Cheng, Yunjiang Xu, Juan eng 2019/08/06 J Agric Food Chem. 2019 Aug 28; 67(34):9468-9476. doi: 10.1021/acs.jafc.9b03158. Epub 2019 Aug 15"