IBA对‘密花’芒茎秆扦插幼苗根系的影响

Effects of IBA on root growth of the seedlingsprogagated from stem cuttings in ChineseSilvergrass (Miscanthus sinensis cv.Mihua)

摘要:

以‘密花’芒(Miscanthus sinensis cv.Mihua)为材料,研究了不同IBA浓度(0、0.1%、0.2%、0.3%、0.5%和1%)处理对其茎秆扦插幼苗根系的影响。结果表明:随着IBA浓度的增加,其茎秆扦插幼苗的根长、根表面积、根体积、根尖数和根平均直径均呈现先增大后减小的变化趋势,且在0.3%IBA处理时达到最大值,分别为1 187.964 cm、632.647 cm²、12.424 cm³、15 280.167和0.696 mm。0.1%、0.2%和0.3%的IBA浓度处理对幼苗根系生长有明显的促进作用,当IBA浓度为1% 时对扦插幼苗根系生长有明显的抑制作用。

Abstract:

This study investigated the effects of different IBA concentrations (0,0.1%,0.2%,0.3%,0.5% and 1%) on the root growth of seedlings propagated from stem cuttings in Chinese Silvergrass (Miscanthus sinensis ‘Mihua’).The results showed that root length,root surface area,root volume,root tip number and mean root diameter of the seedlings propagated from stem cuttings initially increased with the increasing concentration of IBA,followed by a decrease when IBA concentration further increased.Root length,root surface area,root volume,root tip number and mean root diameter reached the maximum at 0.3% IBA treatment,which were 1 187.964 cm,632.647 cm²,12.424 cm³,15 280.167 and 0.696 mm,respectively.The IBA concentration in a range of 0.1%~0.3% could obviously promote the root growth of seedlings;however,root growth was significantly inhibited when IBA concentration increased to 1%.