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Fig. 2 | Biotechnology for Biofuels

Fig. 2

From: Modulation of the balance of fatty acid production and secretion is crucial for enhancement of growth and productivity of the engineered mutant of the cyanobacterium Synechococcus elongatus

Fig. 2

Effects of light intensity and nitrogen source on growth and FFA production. a Growth and FFA production of dAS1T. Cells grown in nitrate-containing medium under low light (50 μE m−2 s−1) were harvested and transferred to nitrate or ammonium-containing medium at t = 0 and incubated under high light (180 μE m−2 s−1) or low light (50 μE m−2 s−1). Solid lines optical density at 730 nm (OD730); dotted lines FFA concentrations in medium. Closed circles cells grown in nitrate-containing medium under low light (n = 3); Open circles cells grown in nitrate-containing medium under high light (n = 6); Open triangles cells grown in ammonium-containing medium under high light (n = 3). Data shown are the mean ± SE from the biological replicates. b Appearance of the cultures at t = 240 h, showing the growth defect of dAS1T in nitrate-containing medium under high light after prolonged cultivation

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