Long-term diazotrophic cultivation of Trichormus sp. IMU26: evaluation of physiological changes related to elevated phycobiliprotein content

Haddad M. F., Dayioglu T., Yaman M., Nalbantoglu B., ÇAKMAK T.

Journal of Applied Phycology, vol.32, no.2, pp.881-888, 2020 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 32 Issue: 2
  • Publication Date: 2020
  • Doi Number: 10.1007/s10811-019-02012-3
  • Journal Name: Journal of Applied Phycology
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Agricultural & Environmental Science Database, Aqualine, Aquatic Science & Fisheries Abstracts (ASFA), BIOSIS, CAB Abstracts, Pollution Abstracts, Veterinary Science Database
  • Page Numbers: pp.881-888
  • Yıldız Technical University Affiliated: Yes

Abstract

A filamentous cyanobacterium, Trichormus sp. IMU26, capable of rapid growth and high phycobiliprotein (PBP) production under N-2-fixing conditions was isolated. The strain has been maintained in N-free BG-11 medium for more than 20 months upon isolation. Nitrogen supply resulted in higher soluble protein and saccharide content but a lower growth rate and PBP production in Trichormus sp. IMU26. Short-term N-P deprivation induced PBP production with no clear change in growth while growth and PBP content decreased in the longer incubation period. Induction of PBP production in N-P-deprived cells was characterized by FTIR analysis and change in carotenoid-pigment interactions. Rapid induction of zeaxanthin and beta-carotene production and slight reduction of echinenone and canthaxanthin levels might be associated with increased PBP levels in short-term N-P deprivation of Trichormus sp. IMU26. Overall, long-term diazotrophic growth of N-2-fixing cyanobacteria may increase the PBP yield.