Nitrogen Deprivation Drives Red Motile Cell Formation in <i>Haematococcus pluvialis</i>: Physiological and Transcriptomic Insights.

ABSTRACT: Background: Natural astaxanthin, a commercially valuable carotenoid, is primarily sourced from Haematococcus pluvialis, a microalga known for its remarkable resilience to environmental stress. Methods: In this study, the physiological and transcriptomic responses of H. pluvialis to ND were investigated at various time points under high light conditions. Results: Under high light conditions, nitrogen deprivation (ND) enhances astaxanthin content (33.23 mg g^-1) while inhibiting the formation of the secondary cell wall (SCW), increasing astaxanthin content by 29% compared to the nitrogen-replete group (25.64 mg g^-1); however, the underlying mechanisms remain unclear. ND reduced chlorophyll fluorescence parameters, elevated reactive oxyg

SUBMITTER: Xing H 

PROVIDER: S-EPMC12195371 | biostudies-literature | 2025 Jun

REPOSITORIES: biostudies-literature