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The complete chloroplast genome of Ocimum tenuiflorum L. subtype Krishna Tulsi and its phylogenetic analysis.

ABSTRACT: The complete chloroplast genome (cp) of Ocimum tenuiflorum L. subtype Krishna Tulsi was sequenced and assembled using Illumina paired-end sequencing data. The cp genome is 151,758 bp in length, including a large single copy (LSC) region of 82,794 bp, a small single-copy region (SSC) of 17,592 bp, and a pair of inverted repeated (IR) region of 25,686 bp. The cp genome of Krishna Tulsi encodes 129 genes, including 90 protein-coding, 31 transfer RNA (tRNA), and eight ribosomal RNA (rRNA) genes. While the overall GC content was 37.9%, it is 36.0%, 31.8%, and 43.1% in the LSC, SSC, and IR regions, respectively. Phylogenetic analysis based on chloroplast genome sequences of 17 species from Lamiaceae revealed that O. tenuiflorum subtype Krishna Tulsi is clustered with other Ocimum species, and forms a clade with genera from family Lamiaceae.

SUBMITTER: Kavya NM

PROVIDER: S-EPMC8284814 | biostudies-literature |

REPOSITORIES: biostudies-literature

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Genome sequencing of herb Tulsi (Ocimum tenuiflorum) unravels key genes behind its strong medicinal properties.

Project description:BackgroundKrishna Tulsi, a member of Lamiaceae family, is a herb well known for its spiritual, religious and medicinal importance in India. The common name of this plant is 'Tulsi' (or 'Tulasi' or 'Thulasi') and is considered sacred by Hindus. We present the draft genome of Ocimum tenuiflurum L (subtype Krishna Tulsi) in this report. The paired-end and mate-pair sequence libraries were generated for the whole genome sequenced with the Illumina Hiseq 1000, resulting in an assembled genome of 374 Mb, with a genome coverage of 61 % (612 Mb estimated genome size). We have also studied transcriptomes (RNA-Seq) of two subtypes of O. tenuiflorum, Krishna and Rama Tulsi and report the relative expression of genes in both the varieties.ResultsThe pathways leading to the production of medicinally-important specialized metabolites have been studied in detail, in relation to similar pathways in Arabidopsis thaliana and other plants. Expression levels of anthocyanin biosynthesis-related genes in leaf samples of Krishna Tulsi were observed to be relatively high, explaining the purple colouration of Krishna Tulsi leaves. The expression of six important genes identified from genome data were validated by performing q-RT-PCR in different tissues of five different species, which shows the high extent of urosolic acid-producing genes in young leaves of the Rama subtype. In addition, the presence of eugenol and ursolic acid, implied as potential drugs in the cure of many diseases including cancer was confirmed using mass spectrometry.ConclusionsThe availability of the whole genome of O.tenuiflorum and our sequence analysis suggests that small amino acid changes at the functional sites of genes involved in metabolite synthesis pathways confer special medicinal properties to this herb.

| S-EPMC4552454 | biostudies-literature

Ocimum tenuiflorum cultivar:Krishna

Project description:Ocimum tenuiflorum cultivar Krishna Genome sequencing

| PRJNA706881 | ENA

The complete chloroplast genome and phylogenetic analysis of Ocimum kilimandscharicum Gurke (Camphor Basil) from India.

Project description:Ocimum kilimandscharicum Gurke commonly known as Camphor Basil, is a medicinal plant species that belongs to the Lamiaceae family. Here, the sequencing and characterization of complete chloroplast genome sequence of O. kilimandscharicum is reported for the first time using Illumina paired-end sequencing data. The size of the chloroplast (cp) genome is 151,741 bp in length, with a large single-copy (LSC) region of 82,882 bp and a small single-copy (SSC) region of 17,587 bp, separated by a pair of 25,636 bp inverted repeat (IR) regions. There are 135 predicted genes, including 90 protein-coding genes, 37 transfer RNA (tRNA) genes, and eight ribosomal RNA (rRNA) genes in the genome, and the overall GC content of the genome is 37.9%. The phylogenetic analysis based on the chloroplast genome data indicated that O. kilimandscharicum is closer to O. tenuiflorum and clustered to other Ocimum species in Lamiaceae.

| S-EPMC8253197 | biostudies-literature

Chloroplast DNA phylogeography of holy basil (Ocimum tenuiflorum) in Indian subcontinent.

Project description:Ocimum tenuiflorum L., holy basil "Tulsi", is an important medicinal plant that is being grown and traditionally revered throughout Indian Subcontinent for thousands of years; however, DNA sequence-based genetic diversity of this aromatic herb is not yet known. In this report, we present our studies on the phylogeography of this species using trnL-trnF intergenic spacer of plastid genome as the DNA barcode for isolates from Indian subcontinent. Our pairwise distance analyses indicated that genetic heterogeneity of isolates remained quite low, with overall mean nucleotide p-distance of 5 × 10(-4). However, our sensitive phylogenetic analysis using maximum likelihood framework was able to reveal subtle intraspecific molecular evolution of this species within the subcontinent. All isolates except that from North-Central India formed a distinct phylogenetic clade, notwithstanding low bootstrap support and collapse of the clade in Bayesian Inference. North-Central isolates occupied more basal position compared to other isolates, which is suggestive of its evolutionarily primitive status. Indian isolates formed a monophyletic and well-supported clade within O. tenuiflorum clade, which indicates a distinct haplotype. Given the vast geographical area of more than 3 million km(2) encompassing many exclusive biogeographical and ecological zones, relatively low rate of evolution of this herb at this locus in India is particularly interesting.

| S-EPMC3910118 | biostudies-literature

The complete chloroplast genome of Ocimum americanum Linnaeus 1755 and phylogenetic analysis among the Lamiaceae family.

Project description:Ocimum americanum Linnaeus 1755 (Lemon basil) is an essential medicinal species in the Ocimum genus. Its leaf decoction is traditionally used to treat diabetes, constipation, diarrhea, piles, and dysentery. The essential oils from this species have intense fungicidal activity. The complete chloroplast genome sequence of O. americanum was assembled from Illumina paired-end sequencing data. The O. americanum chloroplast genome was 152,460 bp in length, containing a large single copy (LSC) region of 83,459 bp and a small single copy (SSC) region of 17,607 bp, separated by a pair of inverted repeats (IRs) of 25,697 bp. The genome contained 134 unique genes, including 89 protein-coding, 37 tRNA, and eight rRNA genes. Among them, nine genes had a single intron, and two genes contained two introns. The overall GC content of the chloroplast genome was 38%, while the corresponding values of LSC, SSC, and IR regions were 35.8%, 31.7%, and 43.1%, respectively. In the phylogenetic analysis, all the Ocimum species formed a group closely related to Plectranthus barbatus. O. americanum was more closely related to O. gratissimum and O. basilicum than the other species of Ocimum included in this study.

| S-EPMC10583627 | biostudies-literature

The complete chloroplast genome of Ocimum basilicum L. var. basilicum (Lamiaceae) and its phylogenetic analysis.

Project description:Ocimum basilicum L. var. basilicum (Sweet Basil) is an aromatic herb belonging to the family Lamiaceae and is known for its medicinal uses. It is commonly used in traditional medicine for its therapeutic value, including anti-allergic, anti-inflammatory, antioxidant, antitumor, and antimicrobial properties. In this study, we generated the complete chloroplast genome sequence of O. basilicum var. basilicum using Illumina paired-end sequencing data. The chloroplast genome was 152,407 bp in length, containing a large single-copy (LSC) region of 83,409 bp and a small single-copy region (SSC) of 17,604 bp, separated by a pair of inverted repeats (IRs) of 25,697 bp. The genome contained 134 genes, including 89 protein-coding, 37 tRNA, and eight rRNA genes. Nine genes had one intron, two genes had two introns, and others did not have any intron. Overall GC content of the chloroplast genome was 38%, while that of LSC, SSC, and IR regions was 35.9%, 31.6%, and 43.1%, respectively. Phylogenetic analysis of the chloroplast genomes revealed that O. basilicum var. basilicum was closely related to Ocimum basilicum from the Ocimum species.

| S-EPMC10769543 | biostudies-literature

Ocimum tenuiflorum

Project description:Ocimum tenuiflorum Transcriptome or Gene expression

| PRJNA238293 | ENA

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Project description:Ocimum tenuiflorum Organism overview

| PRJNA255820 | ENA

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| PRJNA718132 | ENA

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