De novo Sequencing and Analysis of Salvia hispanica Tissue-Specific Transcriptome and Identification of Genes Involved in Terpenoid Biosynthesis
Salvia hispanica (commonly known as chia) is gaining popularity worldwide as a healthy food supplement due to its low saturated fatty acid and high polyunsaturated fatty acid content, in addition to being rich in protein, fiber, and antioxidants. Chia leaves contain plethora of secondary metabolites with medicinal properties. In this study, we sequenced chia leaf and root transcriptomes using the Illumina platform. The short reads were assembled into contigs using the Trinity software and annotated against the Uniprot database. The reads were de novo assembled into 103,367 contigs, which represented 92.8% transcriptome completeness and a diverse set of Gene Ontology terms. Dierential expression analysis identified 6151 and 8116 contigs significantly upregulated in the leaf and root tissues, respectively. In addition, we identified 30 contigs belonging to the Terpene synthase (TPS) family and demonstrated their evolutionary relationships to tomato TPS family members. Finally, we characterized the expression of S. hispanica TPS members in leaves subjected to abiotic stresses and hormone treatments. Abscisic acid had the most pronounced eect on the expression of the TPS genes tested in this study. Our work provides valuable community resources for future studies aimed at improving and utilizing the beneficial constituents of this emerging healthy food source.
Wimberley, J.; Cahill, J.; Atamian, H.S. De novo sequencing and analysis of Salvia hispanica tissue-specific transcriptome and identification of genes involved in terpenoid biosynthesis. Plants 2020, 9, 405. https://doi.org/10.3390/plants9030405
Figure S1: Phylogenetic analysis of S. hispanica, File S1: Sequences of S. hispanica transcriptome assembled in this study, Table S1: Annotation of the assembled contigs, Table S2: The counts of the dierentially expressed genes, Table S3: Enrichment analysis within individual clusters, Table S4: Gene names and annotations representing individual clusters, Table S5: S. hispanica homologs of Thiamine and Riboflavin biosynthetic genes.
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This article was originally published in Plants, volume 9, in 2020. https://doi.org/10.3390/plants9030405