Auxins influence the growth of stems toward light (phototropism) and against the force of gravity (geotropism).

它可影响光性和背地性生长。

The result showed that the successful rooting system was closely related to the concentration of macronutrient of MS medium, auxin concentration and developing state of the explant.

结果表明，培养基中无机盐浓度、外源激素水平、种类以及外植体发育状况等对试管嫩生根具有明显影响。

It is the factors affected plant regeneration in explant culture in Euphorbia pulchrrima willd to different explants or aurin or cytokinin or the combination of the auxin and cytokinin.

外植体类型、植物生长素、细胞分裂素类型及二者不同组合均对一品红在离体条件下植株再生具有影响。