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The complete chloroplast genome of Achyranthes bidentata Blume.

ABSTRACT: Achyranthes bidentata is a popular Chinese medicine, that has its place in the treatment of spasm, osteodynia of the lumbar region and knees. The complete chloroplast (cp) genome of A. bidentata was determined. The complete cp genome is 151,543 bp in length and includes a large single-copy (LSC) region of 83,922 bp, a small single-copy (SSC) region of 17,251 bp, and a pair of inverted repeat regions (IRs) of 25,185 bp. It encodes 131 genes, including 86 protein-coding genes, eight rRNAs, and 37 tRNAs. Phylogenetic analysis indicates that four samples of A. bidentata formed a clade with a 100% bootstrap value.

SUBMITTER: Yuan W

PROVIDER: S-EPMC7971321 | biostudies-literature |

REPOSITORIES: biostudies-literature

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Complete chloroplast genome of Achyranthes bidentata Blume.

Project description:Achyranthes bidentata Blume is an important herbal medicine. However, little genetic information about Achyranthes is available. To facilitate species identification, we sequenced its complete chloroplast genome using the Illumina MiSeq platform. The data show that the chloroplast genome of A. bidentata is 151,441 bp in size and comprises an 83,890 bp large single-copy region, a 17,261 bp small single-copy region, and two inverted repeat (IR) regions, IRa and IRb (each 25,145 bp). The genome contains 112 unique genes, including 79 protein-coding genes, 4 ribosomal RNAs genes, and 30 transfer RNAs genes. Phylogenetic analysis revealed that A. bidentata is most closely related to Alternanthera philoxeroides.

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Phytoecdysteroids from the roots of Achyranthes bidentata Blume.

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The complete chloroplast genome sequence of a traditional Chinese medicine: Achyranthes bidentata (Amaranthaceae).

Project description:Achyranthes bidentata (Amarathaceae) has been commonly used as a traditional Chinese medicine in the treatment of osteoporosis and bone nonunion. Here, the complete chloroplast genome of A. bidentata was assembled and characterized. The cp genome is 151,451 bp in length, composed of a pair of 25,150 bp inverted repeat (IR) regions separated by a large single-copy (LSC) region of 83,899 bp and a small single-copy (SSC) region of 17,252 bp. The whole cp genome of A. bidentata contains 130 genes(85 protein-coding genes, 37 tRNAs and eight rRNAs) and the overall GC content is 36.5%. Phylogenetic analysis based on the cp genome data showed that A. bidentata was close to Cyathula capitata.

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Complete Genome Sequence of Alternanthera mosaic virus, Isolated from Achyranthes bidentata in Asia.

Project description:Alternanthera mosaic virus (AltMV) infecting Achyranthes bidentata was first detected in Asia, and the complete genome sequence (6,604 nucleotides) was determined. Sequence identity analysis and phylogenetic analysis confirmed that this isolate is the most phylogenetically distant AltMV isolate worldwide.

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The Sublethal Effects of β-Ecdysterone, a Highly Active Compound from Achyranthes bidentata Blume, on Grape Phylloxera, Daktulosphaira vitifoliae Fitch.

Project description:Grape phylloxera, Daktulosphaira vitifoliae (Fitch) (Hemiptera, Phylloxeridae), is a very destructive insect pest of grapevines. Intercropping of Achyranthes bidentata Blume (f. Amaranthaceae) and Vitis spp. grapevines can be useful to control this pest. In the present study, the toxicity of 22 compounds, known to be present in A. bidentata, to grape phylloxera was evaluated. All treatments were toxic towards grape phylloxera but the degree of toxicity differed between treatments. Among the 22 tested compounds, several of which proved toxic towards grape phylloxera. However β-ecdysterone had higher toxic effects against grape phylloxera, with LC50 values of 175.73 mg a.i. liter-1. In addition, we assessed the sublethal effects of LC10, LC20 and LC40 of β-ecdysterone on grape phylloxera. The fourth instar and adult developmental periods and total life span were significantly prolonged by LC40 of β-ecdysterone. Fecundity decreased when grape phylloxera were exposed to LC20 and LC40 of β-ecdysterone. In addition, LC40 of β-ecdysterone decreased the intrinsic rate of increase (rm) and the finite rate of increase (λ) and prolonged the population doubling time (DT). The net reproductive rate (R0) was significantly reduced by both the LC20 and LC40 β-ecdysterone treatments. Our results demonstrated that β-ecdysterone had higher toxic effects and significant sublethal effects on grape phylloxera, and showed potential control of grape phylloxera.

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Bidentatide, a Novel Plant Peptide Derived from Achyranthes bidentata Blume: Isolation, Characterization, and Neuroprotection through Inhibition of NR2B-Containing NMDA Receptors.

Project description:Increasing attention is being focused on the use of polypeptide-based N-methyl-d-aspartate (NMDA) receptor antagonists for the treatment of nervous system disorders. In our study on Achyranthes bidentata Blume, we identified an NMDA receptor subtype 2B (NR2B) antagonist that exerts distinct neuroprotective actions. This antagonist is a 33 amino acid peptide, named bidentatide, which contains three disulfide bridges that form a cysteine knot motif. We determined the neuroactive potential of bidentatide by evaluating its in vitro effects against NMDA-mediated excitotoxicity. The results showed that pretreating primary cultured hippocampal neurons with bidentatide prevented NMDA-induced cell death and apoptosis via multiple mechanisms that involved intracellular Ca2+ inhibition, NMDA current inhibition, and apoptosis-related protein expression regulation. These mechanisms were all dependent on bidentatide-induced inhibitory regulation of NR2B-containing NMDA receptors; thus, bidentatide may contribute to the development of neuroprotective agents that would likely possess the high selectivity and safety profiles inherent in peptide drugs.

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