结果表明：试管苗不定根的根原基发生于形成层。
Results identified that the adventitious root primordia originated from the vascular cambium cells.
在根原基诱导培养阶段，激素种类和浓度是影响生根的关键。
The kinds and concentrations of exo-hormones were the key factors that affect rooting in vitro.
大约经12—14天，不定根原基发育为幼小不定根并伸出周皮之外。
After 12-14 days, adventitious root primordia developed into young adventitious roots.
从横切面上观察到，不定根原基起源于髓射线与维管形成层交叉的部位。
From cross sections of stems-cuttings, a primordium of adventitious roots originates from the cross region of pith rays and vascular cambium.
一年生插条苗的根原基形成时间、部位和分化的过程，以及培土措施对根原基分化的影响。
At the same time the differentiation process of the root primordium, and the effect of hilling up with earth on the process have been carefully followed.
试验表明，硬枝扦插生根是潜伏根原基存在与否和皮部内源激素平衡两方面的原因决定的。
The experiments showed that the rooting ability of hardwood cuttings was determined by both presence of latent root primodia and balance of endogenous hormones bark.
ZR对不定根根原基的发生没有明显的作用，但在不定根的进一步生长发育过程中发挥着重要作用；
ZR doesn't influence adventitious roots generation observably, but plays an important role in consequently adventitious roots growth.
根系内源生长素促进烟草生根，但在一定范围内，浓度较低会促进根原基的发生，而浓度较高反而抑制根原基产生，并同时能够促进根系的伸长生长。
But within certain scope, it promoted tobacco roots' primordius' coming into being When the concentration was lower, restrained which and promoted elongation of them when concentration was higher.
毛萼田菁的茎瘤形成于茎上蛰伏的不定根发生点。 当合适的根瘤菌从不定根发生点裂口入侵后，刺激不定根原基周围的皮层细胞分裂形成含菌组织而发育成茎瘤。
Rhizobium sesbania infected through the apical rupture of the growing site of adventitious root, multiplied in the fissure around the root primordium and stimulated the division of cortex cells.
并对四倍体刺槐无性系试管苗不定根的发育过程进行了解剖观察，结果表明试管苗嫩梢无潜伏根原基，不定根由诱生根原基发育形成，诱生根原基源于髓射线细胞的分裂和分化。
Latent root primordium was not found in shoots in test tubes. The induced root primordium which originated from the division and differentiation of pith ray cell developed into the adventitious roots.
并对四倍体刺槐无性系试管苗不定根的发育过程进行了解剖观察，结果表明试管苗嫩梢无潜伏根原基，不定根由诱生根原基发育形成，诱生根原基源于髓射线细胞的分裂和分化。
Latent root primordium was not found in shoots in test tubes. The induced root primordium which originated from the division and differentiation of pith ray cell developed into the adventitious roots.
应用推荐