Physiological and transcriptome analysis elucidates the metabolic mechanism of versatile Porphyridium purpureum under nitrogen deprivation for exopolysaccharides accumulation.

Porphyridium purpureum Exopolysaccharides Nitrogen deprivation Phycoerythrin Polyunsaturated fatty acids Transcriptome analysis

Journal

Bioresources and bioprocessing
ISSN: 2197-4365
Titre abrégé: Bioresour Bioprocess
Pays: Germany
ID NLM: 101665551

Informations de publication

Date de publication:
12 Aug 2021
Historique:
received: 23 05 2021
accepted: 05 08 2021
medline: 12 8 2021
pubmed: 12 8 2021
entrez: 23 4 2024
Statut: epublish

Résumé

Porphyridium purpureum is a mesophilic, unicellular red alga rich in phycoerythrin, sulfate polysaccharides, and polyunsaturated fatty acids. Nitrogen deficiency inhibited the growth of P. purpureum and resulted in yellowing of the cells and thickening of the extracellular viscousness sheath. Under nitrogen stress, the contents of total lipids and exopolysaccharides in P. purpureum were increased by 65.2% and 188.0%, respectively. We demonstrate that the immediate response of P. purpureum to nitrogen deficiency is mediated by carbon flow to polysaccharide synthesis, while the synthesis of lipids is enhanced as a permanent energy storage substance at the later stage. Based on transcriptome annotation information, we elucidate the synthesis pathway of polysaccharides from P. purpureum from the perspective of glycosyl-donor interconversion, and demonstrate that the n-6 pathway is the main synthesis pathway of polyunsaturated fatty acids. This study not only provides a production strategy for polysaccharides and fatty acids by single-celled marine red algae P. purpureum, but also provides targets for further genetic modification.

Identifiants

pubmed: 38650296
doi: 10.1186/s40643-021-00426-x
pii: 10.1186/s40643-021-00426-x
doi:

Types de publication

Journal Article

Langues

eng

Pagination

73

Subventions

Organisme : National Key Research and Development Project of China
ID : 2019YFA0906300

Informations de copyright

© 2021. The Author(s).

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Auteurs

Liang Ji (L)

State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, People's Republic of China.

Shaohua Li (S)

State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, People's Republic of China.

Cheng Chen (C)

State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, People's Republic of China.

Haojie Jin (H)

The College of Forestry, Beijing Forestry University, Beijing, 100083, People's Republic of China.

Haizhen Wu (H)

State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, People's Republic of China.
Department of Applied Biology, East China University of Science and Technology, Shanghai, 200237, People's Republic of China.

Jianhua Fan (J)

State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai, 200237, People's Republic of China. jhfan@ecust.edu.cn.
Department of Applied Biology, East China University of Science and Technology, Shanghai, 200237, People's Republic of China. jhfan@ecust.edu.cn.

Classifications MeSH