【摘要】 多效唑是一种高效的植物生长延缓剂,通过不同浓度的多效唑对金钗石斛试管苗生长的影响进行研究。结果表明多效唑能明显提高金钗石斛试管苗再生芽分化的数量,促进再生苗根的分化,提高生根的数量;同时,多效唑能使再生苗的叶片变短,对再生植株有显著的矮化作用,使植株的茎段变粗,抑制根的伸长生长。多效唑对金钗石斛试管苗生长的影响具有明显的规律性,其作用效果均随着其使用浓度的升高而增强,并在3~4mg/L的范围处达到最强效果,再提高浓度则趋于饱和。更多还原

【Abstract】 PP₃₃₃ is an effective vegetal retardant. The effect of PP₃₃₃ with different concentration on the growth of plantlets of Dendrobium nobilewas studied. The results showed that PP₃₃₃ could heighten the amount of regenerative bud from plantlets,accelerate root differentiation,and increase the amount of the root. Meanwhile,plantlets had shorter leaves and stronger stem under the treatment of PP₃₃₃,but the root growing was restrained. It’s obvious that the effect of PP₃₃₃ on growth of the plantlets was regular. This effect got stronger as the concerntration of PP₃₃₃ was higher. It became the strongest in the range from 3 mg/L to 4 mg/L,and kept this level even the concentration was raised.更多还原