不同断根方式对桃胚培苗移栽的影响

Effects of Different Root-cutting Modes on Transplanting of Embryo-culture Peach Seedlings

以早红2号桃胚培试管苗为试材,以不断根为对照,研究不同断根长度对移栽存活率和生长的影响。结果表明:不同断根长度对移栽存活率、叶片相对生长量无显著影响,断根处理的株高较不断根处理显著降低(P<0.05);根系长度、连接数、节点数、根尖数、分叉数和交叉数的增加倍数均以处理3(从根尖基部切去根长的1/2)最高,均与对照差异显著;且处理3的根系活力最高,达124.17μg/(g·h),与对照及其它处理达显著差异水平。断根对桃胚培苗移栽存活率无显著影响,切去根长1/2更有利于促进新根系的形成和生长。

This paper studied the effects of different root-cutting treatments on the survival rate and growth of transplanted Early Red 2 peach seedlings from embryo rescue culture, taking non-root-cutting treatment as the control. The results showed that the survival rate and leaf relative growth were not significantly affected by different root-cutting treatments. However, root-cutting treatments led to lower plant height （P〈0.05）. The increase multiples of root length, number of connections, number of nodes, number of root tips, number of bifurcations, and number of crosses of peach seedlings in treatment 3 （ cutting half root off） all were the highest among all treatments, and they were significantly higher than those in the control. In addition, the root activity in treatment 3 was the highest [ 124.17 68μg/（ g · h） ], being significantly different from that in the control and other treatments. All these suggested that root-cutting had no significant effect on the survival rate of transplanted embryoculture peach seedlings, and cutting half root off was beneficial to the formation and growth of new root system.