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

Genomics, Proteomics & Bioinformatics 2023年第1期21卷 127-149页

作者： Gang Chen salma mostafa Zhaogeng Lu Ran Du Jiawen Cui Yun Wang Qinggang Liao Jinkai Lu Xinyu Mao Bang Chang Quan Gan Li Wang Zhichao Jia Xiulian Yang Yingfang Zhu Jianbin Yan Biao Jin College of Horticulture and Plant Protection Yangzhou UniversityYangzhou 225009China College of Bioscience and Biotechnology Yangzhou UniversityYangzhou 225009China Department of Floriculture Faculty of AgricultureAlexandria UniversityAlexandria 21526Egypt Key Laboratory of Plant Functional Genomics of the Ministry of Education Yangzhou UniversityYangzhou 225009China Shenzhen Branch Guangdong Laboratory for Lingnan Modern AgricultureKey Laboratory of Synthetic BiologyMinistry of Agriculture and Rural AffairsAgricultural Genomics Institute at ShenzhenChinese Academy of Agricultural SciencesShenzhen 518120China College of Landscape Architecture Nanjing Forestry UniversityNanjing 210037China Institute of Plant Stress Biology State Key Laboratory of Cotton BiologyDepartment of BiologyHenan UniversityKaifeng 475001China

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 novo genome 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 b-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.

关键词： Jasmine flower Jasminum sambac Genome Jasmonate Flower fragrance

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The genome of Medicago polymorpha provides insights into its edibility and nutritional value as a vegetable and forage legume

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Horticulture Research 2021年第1期8卷 565-576页

作者： Jiawen Cui Zhaogeng Lu Tianyi Wang Gang Chen salma mostafa Hailong Ren Sian Liu Chunxiang Fu Li Wang Yingfang Zhu Jinkai Lu Xiang Chen Zhenwu Wei Biao Jin College of Horticulture and Plant Protection Yangzhou University225009 YangzhouChina College of Animal Science and Technology Yangzhou University225009 YangzhouChina Novogene Bioinformatics Institute 100083 BeijingChina College of Bioscience and Biotechnology Yangzhou University225009 YangzhouChina Qingdao Institute of Bioenergy and Bioprocess Technology Chinese Academy of Sciences266101 QingdaoChina State Key Laboratory of Crop Stress Adaptation and Improvement Key Laboratory of Cotton BiologySchool of Life SciencesHenan University475001 KaifengChina

Medicago polymorpha is a nutritious and palatable forage and vegetable plant that also fixes nitrogen.Here,we reveal the chromosome-scale genome sequence of M.polymorpha using an integrated approach including Illumina,PacBio and Hi-C technologies.We combined PacBio full-length RNA-seq,metabolomic analysis,structural anatomy analysis and related physiological indexes to elucidate the important agronomic traits of M.polymorpha for forage and vegetable usage.The assembled M.polymorpha genome consisted of 457.53Mb with a long scaffold N50 of 57.72Mb,and 92.92%(441.83Mb)of the assembly was assigned to seven pseudochromosomes.Comparative genomic analysis revealed that expansion and contraction of the photosynthesis and lignin biosynthetic gene families,respectively,led to enhancement of nutritious compounds and reduced lignin biosynthesis in M.polymorpha.In addition,we found that several positively selected nitrogen metabolism-related genes were responsible for crude protein biosynthesis.Notably,the metabolomic results revealed that a large number of flavonoids,vitamins,alkaloids,and terpenoids were enriched in M.polymorpha.These results imply that the decreased lignin content but relatively high nutrient content of M.polymorpha enhance its edibility and nutritional value as a forage and vegetable.Our genomic data provide a genetic basis that will accelerate functional genomic and breeding research on M.polymorpha as well as other Medicago and legume plants.

关键词： forage breeding value

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