Uptake of inorganic phosphorus by the aquatic plant Isoetes australis inhabiting oligotrophic vernal rock pools

•Isoetes australis did not form symbiosis with mycorrhiza.•I. australis roots accounted for 87% of plant Pi uptake.•Roots of I. australis had a higher Pi affinity and a lower Vmax than leaves.•A pulse-chase study showed Pi transport from roots and old leaves to new leaves. The submerged aquatic fres...

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