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Salt stress response of Nostoc flagelliforme and induction of drnf1 transcription. (A) Physiologically recovered samples were treated by NaCl solutions for 27 h and then transferred to normal solutions for physiological recovery for 20 h. Physiological changes were indexed with the Fv/Fm parameter. Data are mean ± s.d. (n = 5); (B) Semi-quantitative RT-PCR analysis of transcription levels of drnf1 gene under 0.4 M NaCl for different times. 16S rRNA gene was used an internal reference.
