灰毡毛忍冬扦插生根的解剖学特征研究

Anatomical study on rooting of Lonicera macranthoides cutting

目的:研究灰毡毛忍冬枝条扦插繁殖中不定根的发育过程,从解剖学角度探明灰毡毛忍冬枝条生根部位以及愈伤组织与发根的关系。方法:采用石蜡切片法,定期取样研究灰毡毛忍冬插条扦插前和扦插后解剖结构变化过程。结果:灰毡毛忍冬插条内无潜伏根原基,不定根原基是由维管束的边缘束中形成层和髓射线接触部位的薄壁细胞分裂分化形成,不定根属于诱导根原始体型、混合生根型。愈伤组织与不定根的产生有一定的关系。结论:灰毡毛忍冬插条不定根由诱生根原基发育形成,不定根的发生与愈伤组织没有直接关系。

An anatomical study on rooting of Lonicera macranthoides cutting was carried out by the paraffin section method.The observation result showed that there was no root primordium in stem,and the adventitious root primordium of L.macranthoides cutting belonged to the type of the induced root primordium.The adventitious root primordium originated from the cross region of vascular cambium and pith rays.There was no root primordium in the wound calls,between them it existed no direct relationship.