skip to main content
Language:
Search Limited to: Search Limited to: Resource type Show Results with: Show Results with: Search type Index

Transcriptome and Metabolome Profiling of a Novel Isolate Chlorella sorokiniana G32 (Chlorophyta) Displaying Enhanced Starch Accumulation at High Growth Rate Under Mixotrophic Condition

Frontiers in microbiology, 2022-01, Vol.12, p.760307-760307 [Peer Reviewed Journal]

Copyright © 2022 Zhu, Zhang, Liu, Wen, Yang and Liu. ;Copyright © 2022 Zhu, Zhang, Liu, Wen, Yang and Liu. 2022 Zhu, Zhang, Liu, Wen, Yang and Liu ;ISSN: 1664-302X ;EISSN: 1664-302X ;DOI: 10.3389/fmicb.2021.760307 ;PMID: 35069466

Full text available

Citations Cited by
  • Title:
    Transcriptome and Metabolome Profiling of a Novel Isolate Chlorella sorokiniana G32 (Chlorophyta) Displaying Enhanced Starch Accumulation at High Growth Rate Under Mixotrophic Condition
  • Author: Zhu, Qingling ; Zhang, Mengmeng ; Liu, Bingying ; Wen, Fang ; Yang, Zhili ; Liu, Jianhua
  • Subjects: Chlorella sorokiniana ; glucose-responsive genes ; metabolome ; Microbiology ; mixotrophic growth ; transcriptome (RNA-seq)
  • Is Part Of: Frontiers in microbiology, 2022-01, Vol.12, p.760307-760307
  • Description: is one of the most productive microalgal species with a high potential for the production of biofuels and other high value-added molecules. Many studies have focused on its capability of mixotrophic growth using reduced organic carbon and growth pattern shift between autotrophic and mixotrophic conditions. In this study, we investigated growth patterns of a novel isolate, G32, under mixotrophic growth conditions supplemented with a low level (1.25 g L ) and a high level (5 g L ) of glucose. Physiological, transcriptomic (i.e., RNA-seq), and metabolomic (i.e., LC-MS/MS) methods were used. We showed that peak growth based on OD absorbance is ∼4-fold higher with high glucose vs. low glucose supplementation. Photosynthetic efficiency (Fv/Fm) in G32 mixotrophic cultures with high or low glucose supplementation remains identical to that of G32 phototrophic growth. We also found that the conversion rate between absorbance-based cell density and cell dry weight with high glucose supplementation was lower than with low glucose. This suggests that more cell biomass is produced under high glucose treatment than with low glucose. The result was confirmed via sucrose density gradient centrifugation. It is likely that accumulation of high concentration of starch may account for this effect. Transcriptomic analysis of G32 cultures (i.e., via RNA-seq) in response to reciprocal change of glucose levels reveals that expression of a subset of differentially expressed genes (DEGs) is correlated with the amount of glucose supplementation. These DEGs are designated as glucose-specific responsive (GSR) genes. GSR genes are enriched for a number of energy metabolic pathways. Together with metabolomics data (i.e., LC-MS/MS), we show that under high-level supplementation, glucose is preferentially oxidized through an oxidative pentose phosphate pathway. Collectively, our results indicate the mechanism of regulation of glucose assimilation and energy metabolism in G32 under mixotrophic conditions with different levels of glucose supplementation revealed by transcriptomic and metabolomic analyses. We propose that G32 has the potential for the production of high value-added molecules.
  • Publisher: Switzerland: Frontiers Media S.A
  • Language: English
  • Identifier: ISSN: 1664-302X
    EISSN: 1664-302X
    DOI: 10.3389/fmicb.2021.760307
    PMID: 35069466
  • Source: GFMER Free Medical Journals
    PubMed Central
    ROAD: Directory of Open Access Scholarly Resources
    DOAJ Directory of Open Access Journals
Back to results list
INSPIRE LIBRARY - TON DUC THANG UNIVERSITY (84-028) 37 755 057 Feedback
19 Nguyen Huu Tho St. Dist.7, HCM thuvien@tdtu.edu.vn

Copyright © 2017 INSPIRE LIBRARY - TON DUC THANG UNIVERSITY

Searching Remote Databases, Please Wait