Fig. 3
Effects of phytohormones on photosynthetic metabolism of O. borgei under HANS. (A) Chla content; (B) Chlb content; (C) Carotenoid content; (D) Fv/Fm; (E) φPSII; (F) relative expression level of rbcL. HAN. High ammonium-nitrogen (500 mg-N L−1); HAN + IAA. High ammonium nitrogen with 10−6 M IAA; HAN + GA3. High ammonium nitrogen with 10−6 M GA3; HAN + ZT: High ammonium nitrogen with 10−6 M ZT. Experimental data are presented as mean ± standard deviation (SD), with n = 3. Data analysis was performed using GraphPad Prism 9. One-way ANOVA followed by Tukey’s multiple comparisons test was employed to assess significant differences among different treatments at the same time. Statistically significant differences are denoted by different letters (p ≤ 0.05). For comparisons between different time points within the same treatment, unpaired t-tests were applied, and significant differences are marked with asterisks (* p ≤ 0.05, ** p ≤ 0.01).
