has_participant has participant has participant xylem vascular tissue development stage xylem development stage rwalls A vascular tissue development stage (PO:0025424) that has as primary participant a portion of xylem (PO:0005352) tissue. etapa de desarrollo del xilema (Spanish, exact) 木質部発生過程 (Japanese, exact) plant_structure_development_stage PO:0025425 2012-02-04T09:24:38Z