构树去木质部后外源IAA和GA对维管组织和周皮再生的影响(英文)

Effects of Exogenous IAA and GA on Regen eration of Vascular Tissues and Periderm in Broussonetia papyrifera Stems after Removal of the Xylem 1)

１或２年生构树的茎干去木质部后立即除去所有的芽和叶，如果对去芽顶端施以外源ＩＡＡ，或ＩＡＡ和ＧＡ的混合物都能诱导新的茎干状结构的形成。但ＧＡ与ＩＡＡ共同使用后减少了ＩＡＡ所诱导形成的茎干状结构中维管组织的细胞数。单独用ＧＡ可促进愈伤组织的形成，抑制新的周皮、形成层和维管组织的分化。

The application of IAA alone or together with GA to the apex of disbudded and de foliated 1 or 2 year old Broussonetia papyrifera (L.) Vent.treelet stems could induce formation of a new trunk like structure after removal of the cent ral cylinder of xylem and pith.Applying GA together with IAA decreased the num ber of various tissue cells in the IAA induced new trunk like structure.Howeve r treatment with GA by itself promoted callus formation and inhibited new peride rm,cambium and vascular tissues differentiation.