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《素馨花（Jasminum sambac）基因组揭示花香和茉莉酸生物合成的奥秘》

The Jasmine (Jasminum sambac) Genome Provides Insight into the Biosynthesis of Flower Fragrances and Jasmonates.

机构信息

College of Horticulture and Plant Protection, Yangzhou University, Yangzhou 225009, China; College of Bioscience and Biotechnology, Yangzhou University, Yangzhou 225009, China.

College of Horticulture and Plant Protection, Yangzhou University, Yangzhou 225009, China; Department of Floriculture, Faculty of Agriculture, Alexandria University, Alexandria 21526, Egypt.

出版信息

Genomics Proteomics Bioinformatics. 2023 Feb;21(1):127-149. doi: 10.1016/j.gpb.2022.12.005. Epub 2022 Dec 29.

DOI:10.1016/j.gpb.2022.12.005
PMID:36587654
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10372924/
Abstract

Jasminum sambac (jasmine flower), a world-renowned plant appreciated for its exceptional flower fragrance, is of cultural and economic importance. However, the genetic basis of its fragrance is largely unknown. Here, we present the first de novogenome assembly of J. sambac with 550.12 Mb (scaffold N50 = 40.10 Mb) assembled into 13 pseudochromosomes. Terpene synthase (TPS) genes associated with flower fragrance are considerably amplified in the form of gene clusters through tandem duplications in the genome. Gene clusters within the salicylic acid/benzoic acid/theobromine (SABATH) and benzylalcohol O-acetyltransferase/anthocyanin O-hydroxycinnamoyltransferases/anthranilate N-hydroxycinnamoyl/benzoyltransferase/deacetylvindoline 4-O-acetyltransferase (BAHD) superfamilies were identified to be related to the biosynthesis of phenylpropanoid/benzenoid compounds. Several key genes involved in jasmonate biosynthesis were duplicated, causing an increase in copy numbers. In addition, multi-omics analyses identified various aromatic compounds and many genes involved in fragrance biosynthesis pathways. Furthermore, the roles of JsTPS3 in β-ocimene biosynthesis, as well as JsAOC1 and JsAOS in jasmonic acid biosynthesis, were functionally validated. The genome assembled in this study for J. sambac offers a basic genetic resource for studying floral scent and jasmonate biosynthesis, and provides a foundation for functional genomic research and variety improvements in Jasminum.

摘要

素馨花（茉莉花），一种以其独特的花香而闻名于世的植物，具有文化和经济重要性。然而，其香味的遗传基础在很大程度上是未知的。在这里，我们呈现了第一个 Jasminum sambac 的从头基因组组装，大小为 550.12 Mb（支架 N50 = 40.10 Mb），组装成 13 条假染色体。与花香味相关的萜烯合酶（TPS）基因通过基因组中的串联重复以基因簇的形式大量扩增。在水杨酸/苯甲酸/可可碱（SABATH）和苯甲醇 O-乙酰转移酶/花青素 O-羟肉桂酰基转移酶/邻氨基苯甲酸 N-羟肉桂酰基/苯甲酰基转移酶/去乙酰文多灵 4-O-乙酰基转移酶（BAHD）超家族中发现的基因簇与苯丙烷/苯并呋喃化合物的生物合成有关。涉及茉莉酸生物合成的几个关键基因发生了复制，导致拷贝数增加。此外，多组学分析鉴定了各种芳香化合物和许多参与香味生物合成途径的基因。此外，还对 JsTPS3 在 β-罗勒烯生物合成中的作用以及 JsAOC1 和 JsAOS 在茉莉酸生物合成中的作用进行了功能验证。本研究组装的 Jasminum sambac 基因组为研究花香和茉莉酸生物合成提供了基本的遗传资源，并为 Jasminum 的功能基因组研究和品种改良提供了基础。

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