Promoting efficient production of scytonemin in cell culture of Nostoc flagelliforme by periodic short-term solar irradiation
Artikel i vetenskaplig tidskrift, 2023

The ultraviolet-screening pigment scytonemin is bio-synthesized in some sheathed cyanobacteria, exhibiting important ecological and medicinal values. Scytonemin is recognized to be predominantly induced by ultraviolet (UV)-A/B, but UV radiation is often inhibitory for cyanobacterial biomass increase. Here, we found that short-term shock (within 1 h) of natural sunlight could trigger a persistent production of scytonemin in cell suspension culture of Nostoc flagelliforme for several days. We thus exposed the cultures to solar radiation with different time intervals and durations, and found that everyday 30-min solar irradiation was the most effective for achieving the scytonemin production with less growth inhibition. Besides, the technological potential could be advanced by supplementing NaHCO3 or tryptophan in the cultural medium. This work presents a good example of rationally utilizing environmental solar radiation for effectively producing UV-inducible biochemicals in cyanobacteria.



Solar irradiation

Pigment production

Environmental technology


Xiang Gao

Shaanxi University of Technology

Xiaolong Yuan

Shaanxi University of Technology

Tao Zheng

Shaanxi University of Technology

Boyang Ji

Chalmers, Life sciences, Systembiologi

Bioresource Technology Reports

2589014X (eISSN)

Vol. 21 101352


Förnyelsebar bioenergi

Farmakologi och toxikologi




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