生物
代谢组
染色体
基因
遗传学
植物
基因组
进化生物学
代谢组学
生物信息学
作者
Wen‐Bo Wang,Xiangfeng He,Xuemei Yan,Bo Ma,Cunfu Lu,Jing Wu,Yi Zheng,Wenhe Wang,Wenbo Xue,Xue-Chan Tian,Jing‐Fang Guo,Yousry A. El‐Kassaby,Ilga Porth,Pei Leng,Zenghui Hu,Jian‐Feng Mao
摘要
Summary 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; 2 n = 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.
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