三角枫扦插生根过程中营养物质的动态变化

Dynamic Changes of Nutrient Substance During the Rooting of Cutting Propagation of Acer buergerianum Miq.

以三角枫插穗为试材,采用不同种类、浓度的生长素进行处理,分别于春夏秋3个季节进行扦插繁殖试验,并以夏插生根插穗的韧皮部为材料,研究三角枫扦插生根过程中营养物质含量的动态变化。结果表明:与对照(清水浸泡)比,用100mg·L^(-1) NAA+100mg·L^(-1) IBA浸泡插穗3h生根率最高(77%),生根指数为34.28cm;在插穗生根过程中,该处理与对照插穗韧皮部营养物质含量的动态变化趋势相似,可溶性糖含量的变化趋势为"下降-上升-下降-上升-下降"、可溶性淀粉含量为"下降-上升-下降-上升",可溶性蛋白质含量为"上升-下降-上升";100mg·L^(-1)NAA+100mg·L^(-1) IBA浸泡插穗3h明显提高了可溶性糖和可溶性蛋白质含量、促进了可溶性淀粉含量的降解转化;在缩短不定根发生周期方面,生长素处理无明显作用。

The branches of Acer buergerianum were used as test materials,which treated by different types and concentrations of auxins,to complete tests of cutting propagation in spring,summer and autumn.The dynamic changes of nutrient substance content of phloem during rooting were researched in cutting test of summer.The results showed that compared with the CK treatment,the treatment with the highest rooting rate（77%）and rooting index（34.28cm）in summer cutting propagation test was that cutting materials soaked in 100mg·L^-1NAA and 100mg·L^-1 IBA for three hours（the following was replaced by T2）.The trend of dynamic changes of nutrient substance content of T2 and CK were similar,concentration of the soluble sugar had shown‘down-updown-up-down＇changings,the soluble starch had shown‘down-up-down-up＇changings,the soluble protein had shown‘up-down-up＇changings.T2 had improved the content of soluble sugar and soluble protein in phloems and promoted the degradation and transformation of soluble starch.However,there was no obvious effect of auxins on shortening the breedingcycle of adventitious root occurrence of Acer buergerianum Miq.