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Chromosome‐scale genome assembly and insights into the metabolome and gene regulation of leaf color transition in an important oak species, Quercus dentata
Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, Engineering Research Center for Ancient Tree Health and Ancient Tree Culture of National Forestry and Grassland Administration, College of Landscape Architecture, Bioinformatics Center, Beijing University of Agriculture, Beijing, China; Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, National Engineering Laboratory for Tree Breeding, Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants, Ministry of Education, College of Biological Sciences and Technology, Beijing Forestry University, Beijing, China.
Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, Engineering Research Center for Ancient Tree Health and Ancient Tree Culture of National Forestry and Grassland Administration, College of Landscape Architecture, Bioinformatics Center, Beijing University of Agriculture, Beijing, China.
Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, National Engineering Laboratory for Tree Breeding, Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants, Ministry of Education, College of Biological Sciences and Technology, Beijing Forestry University, Beijing, China.
Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, Engineering Research Center for Ancient Tree Health and Ancient Tree Culture of National Forestry and Grassland Administration, College of Landscape Architecture, Bioinformatics Center, Beijing University of Agriculture, Beijing, China; Beijing Advanced Innovation Center for Tree Breeding by Molecular Design, National Engineering Laboratory for Tree Breeding, Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants, Ministry of Education, College of Biological Sciences and Technology, Beijing Forestry University, Beijing, China.ORCID iD: 0000-0002-5867-1718
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2023 (English)In: New Phytologist, ISSN 0028-646X, E-ISSN 1469-8137, Vol. 238, no 5, p. 2016-2032Article in journal (Refereed) Published
Abstract [en]

Quercus dentata Thunb., a dominant forest tree species in northern China, has significant ecological and ornamental value due to its adaptability and beautiful autumn coloration, with color changes from green to yellow into red resulting from the autumnal shifts in leaf pigmentation. However, the key genes and molecular regulatory mechanisms for leaf color transition remain to be investigated.

First, we presented a high-quality chromosome-scale assembly for Q. dentata. This 893.54 Mb sized genome (contig N50 = 4.21 Mb, scaffold N50 = 75.55 Mb; 2n = 24) harbors 31 584 protein-coding genes. Second, our metabolome analyses uncovered pelargonidin-3-O-glucoside, cyanidin-3-O-arabinoside, and cyanidin-3-O-glucoside as the main pigments involved in leaf color transition. Third, gene co-expression further identified the MYB-bHLH-WD40 (MBW) transcription activation complex as central to anthocyanin biosynthesis regulation.

Notably, transcription factor (TF) QdNAC (QD08G038820) was highly co-expressed with this MBW complex and may regulate anthocyanin accumulation and chlorophyll degradation during leaf senescence through direct interaction with another TF, QdMYB (QD01G020890), as revealed by our further protein–protein and DNA–protein interaction assays.

Our high-quality genome assembly, metabolome, and transcriptome resources further enrich Quercus genomics and will facilitate upcoming exploration of ornamental values and environmental adaptability in this important genus.

Place, publisher, year, edition, pages
John Wiley & Sons, 2023. Vol. 238, no 5, p. 2016-2032
Keywords [en]
co-expression network, flavonoids, gene regulation, leaf color transition, Quercus
National Category
Genetics and Breeding in Agricultural Sciences
Research subject
Genetics
Identifiers
URN: urn:nbn:se:umu:diva-206111DOI: 10.1111/nph.18814ISI: 000956881500001PubMedID: 36792969Scopus ID: 2-s2.0-85151486694OAI: oai:DiVA.org:umu-206111DiVA, id: diva2:1746456
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Available from: 2023-03-28 Created: 2023-03-28 Last updated: 2023-06-20Bibliographically approved

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Mao, Jian-Feng

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