http://top-thesaurus.org/trait#TOP4
Root trait
a plant trait (TOP:plant trait) referring to the root system (PO:root system)
http://www.w3.org/2002/07/owl#Class
Eric Garnier, Jens Kattge, Stefan Klotz, Ingolf Kühn, Ulrike Stahl
testing
trait:TOP4
http://top-thesaurus.org/trait#TOP2