植物生长调节剂NAA和6-BA对红蓝石蒜种球营养生长及内源激素的影响

摘要

红蓝石蒜(Lycoris haywardii)为石蒜属中一种自然杂交后代,自然界中分布很少,且自然分球和实生繁殖的增殖系数低,周期长.用不同浓度的NAA(α-萘乙酸)和6-BA(6-苄氨基嘌呤)在出叶期前处理红蓝石蒜种球,研究植物生长调节剂对红蓝石蒜内源激素和营养生长的影响.研究结果显示:持续施加1 mg· L-1 NAA或5 mg· L-1 6-BA可促进种球球径增长,同时,NAA还与提高种球繁殖系数显著相关;内源IAA的含量在各处理下均与对照有显著的差异变化,表明IAA可能是红蓝石蒜营养生长时期中主要的调控内源激素之一.%Lycoris haywardii is a natural hybrids of Lycoris Herb,which is very scarce in nature.It has a low reproductive rate of natural bulb separation and seedling propagation with a long breeding cycle.Effects of plant regulators on the bulb growth and endogenous hormone content of Lycoris haywardii were studied through treated the bulbs with NAA and 6-BA before the leaves emergence,which might provide some theoretical basis and technical support for the development of the Lycoris haywardii industrialization.The experimental data was analyzed by ANOVA and correlation analysis.The results showed that the diameter of bulbs was increased with the treatment of 1 mg· L-1 NAA or 5 mg·L-1 6-BA.Furthermore,NAA was significantly correlated with the increase of the propagation coefficient of bulbs as well.There was significant difference in the endogenous IAA content between the treated group and control group,which showed that IAA was probably one of the key factors of endogenous hormone regulating the bulb growth of Lycoris haywardii.