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Root lignin content per root dry mass trait

Formal name:  root lignin content per root dry mass
Local identifier:  TOP846
Synonym Term:  root lignin content per dry mass
Related Term:  root lignin concentration
Definition:  The ratio of the mass (PATO:mass) of lignin (CHEBI:lignin) in the root (PO:root) to the corresponding root mass (PATO:mass) assessed after drying
Formal Unit:  mass unit / mass unit

Comment:  The term concentration is polysemic and we suggest to not use it in this context. When known, the component of the root on which the measurements have been taken should be specified: coarse root, fine root.
Reference:  Jens Kattge, Ulrike Stahl, Eric Garnier, Stefan Klotz, Ingolf Kühn