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The chromosome-level genome of double-petal phenotype jasmine provides insights into the biosynthesis of floral scent

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Horticultural Plant Journal 2024年第1期10卷 259-272页

作者： Xiangyu Qi Huadi Wang Shuyun Liu Shuangshuang Chen Jing Feng Huijie Chen Ziyi Qin Quanming Chen ikram blilou Yanming Deng Jiangsu Key Laboratory for Horticultural Crop Genetic Improvement Institute of Leisure AgricultureJiangsu Academy of Agricultural SciencesNanjingJiangsu 210014China School of Life Sciences Jiangsu UniversityZhenjiangJiangsu 212013China College of Horticulture Nanjing Agricultural UniversityNanjingJiangsu 210014China Shanghai Personal Biotechnology Company Limited Shanghai 200231China Biological and Environmental Sciences and Engineering King Abdullah University of Science and TechnologyThuwal 23955-6900Saudi Arabia

Jasmine(Jasminum sambac Aiton)is a well-known cultivated plant species for its fragrant flowers used in the perfume industry and ***,the genetic basis of its floral scent is largely *** this study,using PacBio,Illumina,10×Genomics and highthroughput chromosome conformation capture(Hi-C)sequencing technologies,a high-quality chromosome-level reference genome for *** was obtained,exploiting a double-petal phenotype cultivar‘Shuangbanmoli’(JSSB).The results showed that the final assembled genome of JSSB is 580.33 Mb in size(contig N50=1.05 Mb;scaffold N50=45.07 Mb)with a total of 39618 predicted protein-coding *** analyses revealed that the JSSB genome has undergone an ancient whole-genome duplication(WGD)event at 91.68 million years ago(Mya).It was estimated that *** diverged from the lineage leading to Olea europaea and Osmanthus fragrans about 28.8 *** the basis of a combination of genomic,transcriptomic and metabolomic analyses,a range of floral scent volatiles and genes were identified involved in the benzenoid/phenylpropanoid and terpenoid biosynthesis *** results provide new insights into the molecular mechanism of its fragrance biosynthesis in jasmine.

关键词： Jasminum sambac Aiton Oleaceae Genome evolution Floral scent Terpene synthase

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Installing the neurospora carotenoid pathway in plants enables cytosolic formation of provitamin A and its sequestration in lipid droplets

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Molecular Plant 2023年第6期16卷 1066-1081页

作者： Xiongjie Zheng Yasha Zhang Aparna Balakrishna Kit Xi Liew Hendrik N.J.Kuijer Ting Ting Xiao ikram blilou Salim Al-Babili The BioActives Lab Center for Desert Agriculture(CDA)Biological and Environmental Science and Engineering(BESE)King Abdullah University of Science and Technology(KAUST)Thuwal 23955-6900Saudi Arabia The Laboratory of Plant Cell and Developmental Biology(LPCDB) Center for Desert Agriculture(CDA)Biological and Environmental Science and Engineering(BESE)King Abdullah University of Science and Technology(KAUST)Thuwal 23955-6900Saudi Arabia Present address:College of Plant Science and Technology Bejing Key Laboratory for Agricultural Application and New TechniqueBeijing University of AgricultureBeijing 102206China

Vitamin A deficiency remains a severe global health issue,which creates a need to biofortify crops with provitamin A carotenoids(PACs).Expanding plant cell capacity for synthesis and storing of PACs outside the plastids is a promising biofortification strategy that has been little ***,we engineered PAC formation and sequestration in the cytosol of Nicotiana benthamiana leaves,Arabidopsis seeds,and citrus callus cells,using a fungal(Neurospora crassa)carotenoid pathway that consists of only three enzymes converting C5 isopentenyl building blocks formed from mevalonic acid into PACs,including β-*** strategy led to the accumulation of significant amounts of phytoene and γ-and β-carotene,in addition to fungal,health-promoting carotenes with 13 conjugated double bonds,such as the PAC torulene,in the *** the isopentenyl diphosphate pool by adding a truncated Arabidopsis hydroxymethylglutaryl-coenzyme A reductase substantially increased cytosolic carotene *** carotenes accumulate in cytosolic lipid droplets(CLDs),which represent a novel sequestering sink for storing these pigments in plant ***,β-carotene accumulated in the cytosol of citrus callus cells was more light stable compared to compared with plastidialβ-***,engineering cytosolic carotene formation increased the number of large-sized CLDs and the levels of β-apocarotenoids,including retinal,the aldehyde corresponding to vitamin ***,our study opens up the possibility of exploiting the high-flux mevalonic acid pathway for PAC biosynthesis and enhancing carotenoid sink capacity in green and non-green plant tissues,especially in lipid-storing seeds,and thus paves the way for further optimization of carotenoid biofortification in crops.

关键词： Neurospora crassa carotenoid biosynthesis provitamin A metabolic engineering synthetic metabolism cytosolic lipid droplets carotenoid sequestration carotenoid stability

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