pitted thickening
基础科学

        The most extensive formof thickening found in xylem vessels and tra-cheids,where all the inner wall is thickened a-part from small areas called pits. It is common-ly found in secondary xylem and in the lastformed metaxylem. See xylem. See also pit.在木质部导管和......（本文共 304 字）     [阅读本文] >>