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Plant Cell Environ

Title:		UV-B irradiation differentially regulates terpene synthases and terpene content of peach
Author(s):		Liu H; Cao X; Liu X; Xin R; Wang J; Gao J; Wu B; Gao L; Xu C; Zhang B; Grierson D; Chen K;
Address:		"Laboratory of Fruit Quality Biology/Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology, Zhejiang University, Zijingang Campus, Hangzhou, 310058, China. Division of Plant and Crop Sciences, School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough, LE12 5RD, UK"
Journal Title:		Plant Cell Environ
Year:		2017
Volume:		20170830
Issue:		10
Page Number:		2261 - 2275
DOI:		10.1111/pce.13029
ISSN/ISBN:		1365-3040 (Electronic) 0140-7791 (Linking)
Abstract:		"Plants generate protective molecules in response to ultraviolet (UV) light. In laboratory experiments, 48 h UV-B irradiation of peach fruits and leaves reduced the flavour-related monoterpene linalool by 60%. No isoprene was detected, but other terpenoids increased significantly, including a threefold accumulation of the sesquiterpene (E,E)-alpha-farnesene, which was also increased by jasmonic acid treatment. RNA sequencing revealed altered transcript levels for two terpene synthases (TPSs): PpTPS1, a TPS-g subfamily member, decreased by 86% and PpTPS2, a TPS-b subfamily member, increased 80-fold. Heterologous expression in Escherichia coli and transient overexpression in tobacco and peach fruits showed PpTPS1 was localized in plastids and associated with production of linalool, while PpTPS2 was responsible for (E,E)-alpha-farnesene biosynthesis in the cytoplasm. Candidate regulatory genes for these responses were identified. Commercial peach production in Asia involves fruit bagging to maintain marketable yield and quality. TPS gene expression and volatile terpenoid production in field experiments, using bags transmitting high UV-B radiation, showed similar effects on peach volatiles to those from laboratory experiments. Bags transmitting less UV-B light ameliorated the reduction in the flavour volatile linalool, indicating that flavour components of peach fruits can be modulated by selecting an appropriate source of environmental screening material"
Keywords:		"Alkyl and Aryl Transferases/genetics/*metabolism Fruit/genetics/metabolism/radiation effects Gene Expression Regulation, Plant/radiation effects Genes, Plant Phylogeny Prunus persica/genetics/*metabolism/*radiation effects RNA, Messenger/genetics/metaboli;"
Notes:		"MedlineLiu, Hongru Cao, Xiangmei Liu, Xiaohong Xin, Rui Wang, Jiaojiao Gao, Jie Wu, Boping Gao, Liuxiao Xu, Changjie Zhang, Bo Grierson, Donald Chen, Kunsong eng 2017/07/20 Plant Cell Environ. 2017 Oct; 40(10):2261-2275. doi: 10.1111/pce.13029. Epub 2017 Aug 30"