【摘要】 番茄和马铃薯嫁接后,首先在伤口附近出现核趋伤运动。细胞核的趋伤性促进了物质和能量的供应,对伤口的愈合甚为需要。其次是砧木和接穗二者贴近伤口的细胞分裂,产生愈伤组织。在草本茎中有发达的薄壁组织细胞,它们是除形成层外产生愈伤组织的细胞来源。愈伤组织形成后,沿伤口由薄壁细胞分化成木质部分子,将砧木和接穗的木质部连接起来,使维管束愈合。薄壁细胞变化成木质部分子的途径,在轴向是一曲线而不是一直线。更多还原

【Abstract】 Graft between tomato and potato is described. After they are grafted, the first nuclear movements toward the wound location occur in several tiers of cells adjacent to the contact layer. This property of cell nuclei is enriched by the supply of nutrients and energy, required for wound union. Subsequently callus is formed chiefly by cell division of both scion and stock next to the contact layer. The types of cell division are of mitosis and amitosis,but the latter is more fre-quenty observed among the dividing cells. The abundant parenchymatous cells in the herbaceous stem of dicotyledonous plants have the ability to develop cal-lus except the cambial cells, hence in grafting them it should not be emphasi-zed that cambial cells of the two plants must be joined.After callus is formed, parenchymatous cells along the edges of the graft union develop into new xylem members uniting the vascular bundles of the two plants. The path of transformation of parenchymatous cells into xylem members is a curve and not a straight line along the longitudinal axis.更多还原