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. 2022 Apr 22;9:uhac096. doi: 10.1093/hr/uhac096

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© The Author(s) 2022. Published by Oxford University Press on behalf of Nanjing Agricultural University

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.

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Effects of methylation level and chromatin accessibility on the expression of genes related to linalool production in sweet osmanthus ‘Chenghong Dangui’ petals (‘Zaohuang’-vs-‘Chenghong Dangui’). A, Methylation level and chromatin accessibility analysis of related genes in linalool production. D-G3P: D-glyceraldehyde 3-phophate, DXP: 1-deoxy-D-xylulose 5-phosphate, MEP: 2-C-methyl-D-erythritol 4-phosphate, CM: 4-(cytidine 5′-diphospho)-2-C-methyl-D-erythritol, PCM: 2-phospho-4-(cytidine 5′-diphospho)-2-C-methyl-D-erythritol, MECDP: 2-C-methyl-D-erythritol 2,4-cyclodiphosphate, HDMAPP: 1-hydroxy-2-methyl-2-butenyl 4-diphosphate, DMAPP: dimethylallyl-PP, HMG-CoA: 3-hydroxy-3-methyl-glutaryl-CoA, IPP: isopentenyl-PP, DXS: 1-deoxy-D-xylulose-5-phosphate synthase, DXR: 1-deoxy-D-xylulose-5-phosphate reductoisomerase, ISPD: 2-C-methyl-D-erythritol 4-phosphate cytidylyltransferase, ISPH: 4-hydroxy-3-methylbut-2-enyl diphosphate reductase, ISPE: 4-diphosphocytidyl-2-C-methyl-D-erythritol kinase, ISPF: 2-C-methyl-D-erythritol 2,4-cyclodiphosphate synthase, HDS: 1-hydroxy-2-methyl-2-(E)-butenyl-4-diphosphate synthase, HDR: 1-hydroxy-2-methyl-2-(E)-butenyl-4-diphosphate reductase, GGPS: geranylgeranyl pyrophosphate synthase, HMGCS: hydroxymethyl glutaryl-CoA synthase, HMGCR: hydroxymethyl glutaryl-CoA reductase, MVK: mevalonate kinase, MVAK2: phosphomevalonate kinase, MVD: diphosphomevalonate decarboxylase, IDI: isopentenyl diphosphate isomerase, TPS: terpene synthase. B–C, DNA methylation level and chromatin accessibility analysis of TPS1 and TPS2 genes. DMRs upstream of TPS2 in ‘Chenghong Dangui’ and ‘Zaohuang’ are marked with a yellow box. DARs of TPS2 in ‘Chenghong Dangui’ and ‘Zaohuang’ are marked with a green box. Y, ‘Zaohuang’; D, ‘Chenghong Dangui’.