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| 1 | The chromosome-based lavender genome provides new in sights into Lamiaceae evolution and terpenoid biosynthesis显示文摘The aromatic shrub Lavandula angustifolia produces various volatile terpenoids that serve as resources for essential oils and function in plant-insect communication.To better understand the genetic basis of the terpenoid diversity in lavender,we present a high-quality reference genome for the Chinese lavender cultivar‘Jingxun 2'using PacBio and Hi-C technologies to anchor the 894.50 Mb genome assembly into 27 pseudochromosomes.In addition to the y triplication event,lavender underwent two rounds of whole-genome duplication(WGD)during the Eocene-Oligocene(29.6 MYA)and Miocene-Pliocene(6.9 MYA)transitions.As a result of tandem duplications and lineage-specific WGDs,gene families related to terpenoid biosynthesis in lavender are substantially expanded compared to those of five other species in Lamiaceae.Many terpenoid biosynthesis transcripts are abundant in glandular trichomes.We further integrated the contents of ecologically functional terpenoids and coexpressed terpenoid biosynthetic genes to construct terpenoid-gene networks.Typical gene clusters,including TPS-TPS,TPS-CYP450,and TPS-BAHD,linked with compounds that primarily function as attractants or repellents,were identified by their similar patterns of change during flower development or in response to methyl jasmonate.Comprehensive analysis of the genetic basis of the production of volatiles in lavender could serve as a foundation for future research into lavender evolution,phytochemistry,and ecology. | Jingrui Li Yiming Wang Yanmei Dong Wenying Zhang Di Wang Hongtong Bai Kui Li Hui Li Lei Shi | 2021 | Horticulture Research2021，8，1： | 5 |
| 2 | Correction: The chromosome-based lavender genome provides new insights into Lamiaceae evolution and terpenoid biosynthesis显示文摘After the publication of this article 1,the authors became aware that the legends of Figs.3 and 4 were inverted.The correct version is shown below.In addition,the Lavandula angustifolia‘Jingxun 2’was mistakenly edited as Lavandula angustifolia“Jingxun 2”. | Jingrui Li Yiming Wang Yanmei Dong Wenying Zhang Di Wang Hongtong Bai Kui Li Hui Li Lei Shi | 2021 | Horticulture Research2021，8，1： | 1 |
| 3 | Rosemary extract improves egg quality by altering gut barrier function,intestinal microbiota and oviductal gene expressions in late-phase laying hens显示文摘Background Rosemary extract(RE)has been reported to exert antioxidant property.However,the application of RE in late-phase laying hens on egg quality,intestinal barrier and microbiota,and oviductal function has not been systematically studied.This study was investigated to detect the potential effects of RE on performance,egg quality,serum parameters,intestinal heath,cecal microbiota and metabolism,and oviductal gene expressions in late-phase laying hens.A total of 21065-week-old“Jing Tint 6”laying hens were randomly allocated into five treatments with six replicates and seven birds per replicate and fed basal diet(CON)or basal diet supplemented with chlortetracycline at 50 mg/kg(CTC)or RE at 50 mg/kg(RE50),100 mg/kg(RE100),and 200 mg/kg(RE200).Results Our results showed that RE200 improved(P<0.05)Haugh unit and n-6/n-3 of egg yolk,serum superoxide dismutase(SOD)compared with CON.No significant differences were observed for Haugh unit and n-6/n-3 of egg yolk among CTC,RE50,RE100 and RE200 groups.Compared with CTC and RE50 groups,RE200 increased serum SOD activity on d 28 and 56.Compared with CON,RE supplementation decreased(P<0.05)total cholesterol(TC)level.CTC,RE100 and RE200 decreased(P<0.05)serum interleukin-6(IL-6)content compared with CON.CTC and RE200 increased jejunal m RNA expression of ZO-1 and Occludin compared with CON.The biomarkers of cecal microbiota and metabolite induced by RE 200,including Firmicutes,Eisenbergiella,Paraprevotella,Papillibacter,and butyrate,were closely associated with Haugh unit,n-6/n-3,SOD,IL-6,and TC.PICRUSt2 analysis indicated that RE altered carbohydrate and amino acid metabolism of cecal microbiota and increased butyrate synthesizing enzymes,including 3-oxoacid Co A-transferase and butyrate-acetoacetate Co A-transferase.Moreover,transcriptomic analysis revealed that RE200 improved gene expressions and functional pathways related to immunity and albumen formation in the oviductal magnum.Conclusions Dietary supplementation with 200 mg/kg RE could increase egg quality of late-phase laying hens via modulating intestinal barrier,cecal microbiota and metabolism,and oviductal function.Overall,RE could be used as a promising feed additive to improve egg quality of laying hens at late stage of production. | Lianhua Zhang Junwei Ge Fei Gao Min Yang Hui Li Fei Xia Hongtong Bai Xiangshu Piao Zhiying Sun Lei Shi | 2024 | Journal of Animal Science and Biotechnology2024，15，1： | 0 |
| 4 | Chromosome-level assembly and analysis of the Thymus genome provide insights into glandular secretory trichome formation and monoterpenoid biosynthesis in thyme显示文摘Thyme has medicinal and aromatic value because of its potent antimicrobial and antioxidant properties.However,the absence of a fully sequenced thyme genome limits functional genomic studies of Chinese native thymes.Thymus quinquecostatus Celak.,which contains large amounts of bioactive monoterpenes suchas thymol and carvacrol,is an important wild medicinal and aromatic plant in China.Monoterpenoids are abundant in glandular secretory trichomes.Here,high-fidelity and chromatin conformation capture technologies were used to assemble and annotate the T.quinquecostatus genome at the chromosome level.The 13 chromosomes of T.quinquecostatus had a total length of 528.66 Mb,a contig N50 of 8.06 Mb,and a BUSCO score of 97.34%.We found that T.quinquecostatus had experienced two whole-genome duplications,with the most recent event occurring4.34 million years ago.Deep analyses of the genome,in conjunction with comparative genomic,phylogenetic,transcriptomic,and metabonomic studies,uncovered many regulatory factors and genes related to monoterpenoids and glandular secretory trichome development.Genes encoding terpene synthase(TPS),cytochrome P450 monooxygenases(CYPs),short-chain dehydrogenase/reductase(SDR),R2R3-MYB,and homeodomain-leucine zipper(HD-ZIP)IV were among those present in the T.quinquecostatus genome.Notably,Tq02G002290.1(TqTPS1)was shown to encode the terpene synthase responsible for catalyzing production of the main monoterpene product g-terpinene from geranyl diphosphate(GPP).Our study provides significant insight into the mechanisms of glandular secretory trichome formation and monoterpenoid biosynthesis in thyme.This work will facilitate the development of molecular breeding tools to enhance the production of bioactive secondary metabolites in Lamiaceae. | Meiyu Sun Yanan Zhang Li Zhu Ningning Liu Hongtong Bai Guofeng Sun Jinzheng Zhang Lei Shi | 2022 | Plant Communications2022，3，6： | 0 |
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