Research Letter

Effect of Low pH on Carbohydrate Production by a Marine Planktonic Diatom (Chaetoceros muelleri)

Figure 1

Effect of medium pH on photosynthesis and carbohydrate metabolism in Chaetoceros muelleri. Samples taken after 5 days growth in batch culture. (a) Maximum quantum efficiency of photosystem II ( 𝐹 𝑣 / 𝐹 𝑚 ). (b) Total, cell and dissolved extracellular carbohydrate concentrations. (c) Cell-associated carbohydrates. (d) Proportion of carbohydrates in the dissolved extracellular and cell storage pools. (e) Extracellular carbohydrate pools. (f) Concentration of transparent exopolymer particles (TEP). Bars show mean + standard deviation ( 𝑛 = 6 replicate cultures).
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(a)
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(b)
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(c)
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(d)
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(e)
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(f)