Light-dependent uptake, translocation and foliar release of phosphorus by the intertidal seagrass Zostera noltii Hornem

J.J. Pérez-Lloréns, P.R.M. De Visscher, P.H. Nienhuis, F.X. Niell

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    Abstract

    Light-dependent P uptake by root-rhizomes, acropetal translocation and subsequent foliar release by Zostera noltii Hornem. was studied under laboratory conditions in two-compartment chambers using 32P. The uptake by underground parts was unaffected by light conditions but the acropetal translocation proceeded more rapidly in light than in dark, indicating a coupling to the metabolic activity of the plants. The translocated P was mainly accumulated in the youngest leaves (30%), i.e., the most actively growing parts. Foliar release of P might be considered negligible (2–4% of the P taken up by root-rhizomes), indicating that the role of Z. noltii as a “P pump” is of minor importance in the cycling of P between sediment and water. This was calculated for part of the Oosterschelde estuary, Zeeland, The Netherlands.
    Original languageEnglish
    Pages (from-to)165-174
    JournalJournal of Experimental Marine Biology and Ecology
    Volume166
    Issue number2
    DOIs
    Publication statusPublished - 1993

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