De novo transcriptome sequencing of Momordica cochinchinensis to identify genes involved in the carotenoid biosynthesis.

Plant Molecular Biology
Tae Kyung HyunJae-Yean Kim

Abstract

The ripe fruit of Momordica cochinchinensis Spreng, known as gac, is featured by very high carotenoid content. Although this plant might be a good resource for carotenoid metabolic engineering, so far, the genes involved in the carotenoid metabolic pathways in gac were unidentified due to lack of genomic information in the public database. In order to expedite the process of gene discovery, we have undertaken Illumina deep sequencing of mRNA prepared from aril of gac fruit. From 51,446,670 high-quality reads, we obtained 81,404 assembled unigenes with average length of 388 base pairs. At the protein level, gac aril transcripts showed about 81.5% similarity with cucumber proteomes. In addition 17,104 unigenes have been assigned to specific metabolic pathways in Kyoto Encyclopedia of Genes and Genomes, and all of known enzymes involved in terpenoid backbones biosynthetic and carotenoid biosynthetic pathways were also identified in our library. To analyze the relationship between putative carotenoid biosynthesis genes and alteration of carotenoid content during fruit ripening, digital gene expression analysis was performed on three different ripening stages of aril. This study has revealed putative phytoene synthase, 15-cis-phyton...Continue Reading

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Citations

Feb 4, 2014·BMC Research Notes·Keng-See ChowZainorlina Mohd-Zainuddin
May 31, 2015·Plant Science : an International Journal of Experimental Plant Biology·Liang XuLiwang Liu
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