铝对茶树幼茎切片根分化的影响

Effect of aluminium on root differentiation from stem segment.

以薮北种的茎切片为试材，研究了铝（Ａｌ）浓度与ｐＨ及磷（Ｐ）浓度对根分化的影响，结果表明，茎切片根分化的增殖过程呈“Ｓ”曲线。在ｐＨ４．３—５．５时，Ａｌ浓度为０—１０．０ｍｍｏｌ／Ｌ范围内，以ｐＨ５．０及Ａｌ浓度０．５—１．０ｍｍｏｌ／Ｌ对不定根分化的促进作用最大，Ｐ对增加不定根分化数量及分化根长有明显效果．在Ａｌ浓度１ｍｍｏｌ／Ｌ及Ｐ浓度１．２５ｍｍｏｌ／Ｌ下培养，根鲜重增加６３．６％—１７６．９％．

Effect of concentrations of Al,P and pH on root differentiation from stem segment oftea(var.yabukita)was studied.The results showed that the development of root differentiaton fromstem segment assumed an“S”curve.In range of pH 4.5 5. 5 and Al concentration of 0 10.0mmol/L,the best results of root differentiaton was obtained at pH 5.0 and Al concentration of 0.5 1 m mo1/L.The number and length of root were increased by addition of P. Fresh weight of rootin the treament of 1 mmol/L Al and 1.25 mmol/L P increased by 63.6% 176.9%.