root primordium shoot-borne root primordium rwalls PO_GIT:467 adventitious root primordium (broad) plant_anatomy 2012-04-27T09:59:05Z シュート細胞由来の根原基（可視的） (Japanese, exact) PO:0025480 A root primordium (PO:0005029) that is committed to the development of a shoot-borne root (PO:0000042). portion of shoot-borne root primordium tissue (exact) Transition from shoot-borne root primordium to shoot-borne root occurs with the formation of a root cap (PO:0020123), shortly after the development of a root apical meristem (PO:0020147). primordio del eje del epiblasto de la ra&#237z (Spanish, exact)