secondary xylem

英 美
  • 次生木质部
  • secondary adj.次要的;从属的;中等教育的n.副手;次要位置
  • xylem n.木质部
    1. In nonwoody plants the primary xylem is the only water-conducting tissue, but in mature plants with secondary growth this function is mostly taken over by the secondary xylem.
      在尚未木质化的植物中,初生木质部是唯一的输水组织,但在具有次生生长的成熟植物中,该功能大多由次生木质部行使。