Integrated genomic, transcriptomic, and metabolomic analyses of Chrysanthemum aromaticum provide insights into the volatile terpene biosynthesis

IF 6.2 1区 生物学 Q1 PLANT SCIENCES
Cholmin Kim, Xin Wang, Wanjie Xue, Jinfeng Zhao, Xue Yin, Bin Xia, Zhichao Xu, Miao He, Yu Wang, Yang Zhang, Yuhua Li
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引用次数: 0

Abstract

Chrysanthemum aromaticum is renowned for its uniformly emitted strong and attractive scent, primarily attributed to volatile terpenes. Despite its commercial and horticultural significance, the molecular mechanisms underlying volatile terpene production in C. aromaticum remain largely unexplored. Here, we present the haplotype-resolved genome assembly of C. aromaticum, with a total size of 3.10 Gb, comprising nine anchored chromosomes with a contig N50 of 30.66 Mb and a scaffold N50 of 350.58 Mb. Phylogenetic analyses revealed a distant relationship between C. aromaticum and C. indicum, suggesting that C. aromaticum likely represents a distinct species rather than a variety of C. indicum. Through integrated genomic, transcriptomic, metabolomic, and biochemical analyses, we identified seven TPS involved in monoterpene biosynthesis and six TPS for sesquiterpene biosynthesis. Notably, comparative genomic analysis revealed a gene cluster for α-bisabolol biosynthesis in C. aromaticum, which has specifically expanded in Chrysanthemum species through tandem gene duplications, contributing to the elevated accumulation of α-bisabolol in the leaves of C. aromaticum. Our study provides important insights into the biosynthesis of volatile terpenes, highlighting the genetic basis for C. aromaticum's unique aromatic profile.

菊花芳香的基因组学、转录组学和代谢组学综合分析为挥发性萜的生物合成提供了见解
菊花芳香以其均匀散发出强烈而诱人的气味而闻名,主要归因于挥发性萜烯。尽管其具有商业和园艺意义,但其挥发性萜烯生产的分子机制仍未被广泛探索。在此,我们展示了香椿单倍型分解基因组组装,总大小为3.10 Gb,包括9条锚定染色体,contig N50为30.66 Mb, scaffold N50为350.58 Mb。系统发育分析表明,香茅与籼稻之间存在较远的亲缘关系,表明香茅可能代表一个不同的种,而不是籼稻的变种。通过基因组学、转录组学、代谢组学和生化分析,我们确定了7个参与单萜生物合成的TPS和6个参与倍半萜生物合成的TPS。值得注意的是,比较基因组分析显示,香菊中存在α-双abolol生物合成基因簇,该基因簇通过串联基因复制在菊花中特异性扩增,导致香菊叶片中α-双abolol积累量增加。我们的研究为挥发性萜的生物合成提供了重要的见解,突出了香茅独特芳香谱的遗传基础。
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来源期刊
The Plant Journal
The Plant Journal 生物-植物科学
CiteScore
13.10
自引率
4.20%
发文量
415
审稿时长
2.3 months
期刊介绍: Publishing the best original research papers in all key areas of modern plant biology from the world"s leading laboratories, The Plant Journal provides a dynamic forum for this ever growing international research community. Plant science research is now at the forefront of research in the biological sciences, with breakthroughs in our understanding of fundamental processes in plants matching those in other organisms. The impact of molecular genetics and the availability of model and crop species can be seen in all aspects of plant biology. For publication in The Plant Journal the research must provide a highly significant new contribution to our understanding of plants and be of general interest to the plant science community.
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