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Leaf sodium content per leaf dry mass

Formal name:  leaf sodium content per leaf dry mass
Local identifier:  TOP460
Synonym Term:  leaf Na content per dry mass
Related Term:  leaf Na concentration
Related Term:  leaf Na content
Definition:  The ratio of the quantity (SEP:quantity) of sodium (CHEBI:sodium atom) in the leaf (PO:leaf) or component thereof, i.e. leaf lamina or leaflet (PO:leaf lamina, PO:leaflet) per respective unit dry mass (TOP:leaf dry mass, TOP:leaf lamina dry mass, TOP:leaflet dry mass)
Formal Unit:  mass unit / mass unit or amount unit / mass unit

Comment:  The quantity of sodium can be expressed either as a mass (with mass unit, e.g. gram) or as an amount (with amount unit, e.g. mol). The term concentration is polysemic and we suggest to not use it in this context.
Reference:  Eric Garnier, Jens Kattge, Stefan Klotz, Ingolf Kühn, Ulrike Stahl


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