Response of cyanobacterial mats to ambient phosphate fluctuations: phosphorus cycling, polyphosphate accumulation and stoichiometric flexibility

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SUMMARY

    Variations from this ratio (106 C:16 N:1 P) are considered indicative of nutrient limitation but also affected by the current growth phase of the cells, induced by allocation changes in the biosynthetic machinery, e_g, towards P-rich rRNA for protein synthesis at high growth rates. The colour change suggested the loss of photosynthetic pigments, but the authors could not clarify whether this occurred through active cellular pigment reduction or degradation of available chlorophyll e_g, by oxidation. Many different types of oligotrophic aquatic habitats experience only temporal P pulses, e_g, from redox changes . . .

     

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