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Melilotus albus

ABSTRACT: Identifying similar transcripts in a related organism from de Bruijn graphs of RNA-Seq data, with applications to the study of salt and waterlogging tolerance in Melilotus

PROVIDER: PRJNA185437 | ENA |

REPOSITORIES: ENA

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Dataset's files

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			Action	DRS
	SRR8703810.fastq.gz	Fastqsanger.gz
	SRR8703811.fastq.gz	Fastqsanger.gz
	SRR8703812.fastq.gz	Fastqsanger.gz
	SRR8703813.fastq.gz	Fastqsanger.gz
	SRR8703814.fastq.gz	Fastqsanger.gz

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Project description:Identifying similar transcripts in a related organism from de Bruijn graphs of RNA-Seq data, with applications to the study of salt and waterlogging tolerance in Melilotus

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Transcriptomic profiling of Melilotus albus near-isogenic lines contrasting for coumarin content.

Project description:Coumarin and its derivatives are widely used as fragrances in industrial products and have medical value. The goal of the present study was to discover genes and pathways related to coumarin biosynthesis in Melilotus albus using transcriptome analysis. The genes of five M. albus near-isogenic lines (NILs) that had different coumarin content and ?-glucosidase activity according to the investigation of pedigree were quantified and then analysed by RNA-Seq. Using transcriptome analysis, differentially expressed genes (DEGs) were identified in two pairwise comparisons that differed in coumarin content as well as in two pairwise comparisons that differed in ?-glucosidase activity. Gene expression pattern analysis suggested similar transcriptional trends in the genotypes with the same coumarin levels. Furthermore, the Kyoto Encyclopedia of Genes and Genomes (KEGG) database of DEGs was used to identify functional pathways associated with coumarin biosynthesis. We identified 111 unigenes, with several DEGs among them possibly being related to coumarin synthesis pathways. Unigenes encoding a hexokinase, an abscisic acid receptor, a phenylalanine ammonia-lyase (PAL) and two peroxidases particularly showed correspondence with the coumarin content of different genotypes. These results will contribute to a better understanding of the coumarin biosynthesis in M. albus.

| S-EPMC5496894 | biostudies-literature

The complete chloroplast genome of <i>Melilotus albus</i>: an important source of forage species.

Project description:Melilotus albus belongs to the legume family. It is known as the greatest potential forage crop and native to Eurasia and North Africa. The nitrogen fixation rate of Melilotus albus is superior to other legumes, making it beneficial for crop rotations. Melilotus albus has also been a species with good forage productivity and is more and more important in the medicinal value of its high coumarin content. In this study, the complete chloroplast genome of Melilotus albus was assembled and analysed. The complete chloroplast genome of Melilotus albus was 127,205?bp in length. It harbours 108 functional genes, including 76 protein-coding genes, 28 transfer RNA, and four ribosomal RNA genes species. The overall nucleotide composition was: 33.3% A, 33.1% T, 16.3% C, and 17.3% G, with a total A?+?T rich content of 66.4%. Phylogenetic relationship analysis showed that Melilotus albus has closely related to Medicago.

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Medicago sativa and Melilotus officinalis

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Analysis of miRNAs and their target genes in five Melilotus albus NILs with different coumarin content.

Project description:MicroRNAs (miRNAs) exhibit diverse and important roles in regulation of various biological processes at the post-transcriptional level in plants. In this study, Melilotus albus miRNA and their target genes were elucidated from five M. albus near-isogenic lines which differ in coumarin content to construct small RNA libraries through high-throughput sequencing. A total of 417 known miRNAs and 76 novel miRNAs were identified in M. albus. In addition, 4155 different target genes for 114 known miRNA families and 14 target genes for 2 novel miRNAs were identified in M. albus. Moreover, mtr-miR5248 and mtr-miR7701-5p target c35498_g3 and gma-miR396a-3p target c37211_g1 involved in coumarin biosynthesis were identified by using the differential expression of the miRNAs and their target genes correlation analysis. The abundance of miRNAs and potential target genes were validated by qRT-PCR analysis. We also found that there were both positive and negative expression changing patterns between miRNAs and their related target genes. Our first and preliminary study of miRNAs will contribute to our understanding of the functions and molecular regulatory mechanisms of miRNAs and their target genes, and provide information on regulating the complex coumarin pathway in M. albus for future research.

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