浙江大学2012植物学甲2008第51到99页.pptxVIP

Early activity model of fascicular cambium and interfascicular cambium (from one layer of initial cells) 束中形成层和束间形成层的早期活动模式（来自一层原始细胞）;Two types of cells in vascular cambium and their acitivity 中形成层和束间形成层的早期活动模式;Ray initial’s and morphology and division 射线原始细胞的形状和分裂;After vascular cambium cells divide, the progeny cells on the interior side become xylem parental cell. As all cells expand to their mature size, the cambial cells are Pushed outward. 维管形成层细胞分裂后，在内侧分裂出来的细胞成为木质部的 母细胞。当所有细胞成熟后，形成层这层细胞便推向外围。 ;2) Appearance and activities of cork cambium 木栓形成层的出现和活动;Early development of cork cambium 木栓形成层的早期发育;In clematis (Clematis sp.), The first phellogen originates deep in the stem tissues: primary phloem 最初的木栓形成层来自 初生韧皮部;Activities of cork cambium: forming periderm 木栓形成层的活动，形成----周皮 （次生保护组织）;Formation of lenticel in previous stomata for woody plants. 在木本植物，在原来气孔的位置形成皮孔 ;Life of cork cambium is only one year, later it also is changed into cortex cells, so that the new cork cambium will appear in inner of the periderm. Finally, it can form in parenchyma cell of secondary phloem. 木栓形成层的寿命只有一年，随后转为木栓， 所以新的木栓 形成层将出现在周皮的内方，最后木栓形成层可以由次生韧皮部 薄壁细胞形成。;Active rule of cork cambium is different in different trees, so form the many types of bark. 由于木栓形成层活动的规律不同，所以出现有各种各样的树皮。 ;different kinds of bark 各种各样的树皮;3) Secondary structures of stem in Diocots 双子叶植物茎的次生结构;3) Secondary structures of stem in Diocots 双子叶植物茎的次生结构;3) Secondary structures of stem in Diocots 双子叶植物茎的次生结构;3) Secondary structures of stem in Diocots 双子叶植物茎的次生结构; This cross-section of a three year old woody stem of basswood (Tilia sp. 椴树) shows a small region of pith to the axial interior surrounded by three distinct growth rings (年轮）;Structure of wood 木材的结构;Structure of wood 木材的结构;Spring wood and autumn wood;Spring wood and autumn wood;Ring-porous wood in elm 榆树多孔渗水的环状木材;;Heartwood: Occlusion of vessels with tyloses 心材： 后期侵填体封闭导管;Structure of wood in Gymnosperm 裸子植物木材的