Figure 6 | Scientific Reports

Figure 6

From: A novel alphaproteobacterial ectosymbiont promotes the growth of the hydrocarbon-rich green alga Botryococcus braunii

Figure 6

Effect of BOTRYCO-2 on the biomass and hydrocarbon productivities of B. braunii.

Final biomass concentrations (a) and hydrocarbon contents (b) of B. braunii with or without BOTRYCO-2 on the basis of the growth experiments depicted in Fig. 5 and Supplementary Fig. S7 (at days 35 and 49 for Ba10− and BOT-22, respectively). The y-axes indicate dry cell weight (dcw) per culture volume and hydrocarbon content (w dcw−1) for a and b, respectively. Bars indicate the standard error of four and five biological replicates for Ba10− and BOT-22, respectively. The final biomass concentrations of Ba10− and BOT-22 with BOTRYCO-2 were significantly higher than those without BOTRYCO-2 (homoscedastic one-tailed t-test, P = 0.00003 and P = 0.00007, respectively). The hydrocarbon content of Ba10− with BOTRYCO-2 was significantly higher than that without BOTRYCO-2 (homoscedastic one-tailed t-test, P = 0.00007), whereas BOT-22 showed no significant difference between cultures with and without BOTRYCO-2 (homoscedastic two-tailed t-test, P = 0.107). *** indicates significant differences between with and without BOTRYCO-2 (P < 0.001).

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