Transcriptomic analysis of Dunaliella parva during different growth periods

  • SONG Wei ,
  • TANG Liqun ,
  • GAO Fan
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  • 1(Shanxi Sports Vocational School, Taiyuan 030006, China)
    2(School of Life Science, Shanxi University, Taiyuan 030006, China)

Received date: 2021-08-11

  Revised date: 2021-10-06

  Online published: 2022-03-16

Abstract

As a class of unique salt-tolerance green alga, Dunaliella parva has industrial production potential due to its rich bioactive substances. With the wide application of transcriptomic sequencing, more and more algae functional genes have been discovered. However, the transcriptomic sequencing of D. parva during different growth phases has not been reported yet, which greatly limits the further research on its growth and development mechanism. In this study, transcriptomic sequencing of the algal samples at the early, mid and late growth stages based on morphological, omics and bioinformatics methods was performed. A total of 90 153 unigenes with 49 643 coding domain sequences from 9 cDNA libraries were obtained in this alga. 66.36% of them could be annotated by the seven major bio-databases. 272 contigs were de novo assembled with a 1 305 bp N50 and a GC percentage of 52.32%. The unigenes could be divided into 4 clusters based on their fragments per kilobase of transcript per million fragments values. Compared with the early-stage group, the number of down-regulated genes (52 891) was larger than that of the up-regulated ones (20 759). Integral component of membrane was the most significant ontology in both the mid and late stage sample via gene ontology enrichment analyzing compared with the early-stage sample. Additionally, splicesome and RNA transport were the most significant pathways in the mid and late stage sample, respectively, via KEGG pathway enrichment analysis. The quality of the transcriptomic sequencing data and de novo assembly was high. The screened differentially expressed genes and their predicted functional information will lay a foundation for the further research on growth and development mechanism analysis, algal strain molecular improvement and industrial application of this alga.

Cite this article

SONG Wei , TANG Liqun , GAO Fan . Transcriptomic analysis of Dunaliella parva during different growth periods[J]. Food and Fermentation Industries, 2022 , 48(4) : 82 -89 . DOI: 10.13995/j.cnki.11-1802/ts.028904

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