| 摘要: |
| 【目的】研究植物生长调节剂对闽楠扦插苗生根、生长及生理生化指标的影响，探讨生长调节剂调控闽楠插穗生根及扦插苗生长的机理。【方法】采用正交试验设计，以闽楠扦插苗为材料，测定植物生长调节剂种类、质量浓度及处理时间对闽楠扦插苗生根率、生长及生理生化指标的影响。【结果】闽楠插穗在400 mg/L NAA溶液中浸泡6 h的生根率最高，新梢生长最长。植物生长调节剂种类是影响闽楠扦插苗生根及生长的最主要因素。影响闽楠扦插生根的重要指标是IAAO活性、茎质量和MDA含量，而一级根长度、MDA含量和PPO活性是闽楠扦插苗新梢生长的关键指标。【结论】选择茎质量较大的闽楠插穗，在400 mg/L NAA溶液中浸泡6 h，提高IAAO活性，有利于一级根生长，促进扦插苗的新梢生长，从而培育闽楠扦插壮苗。 |
| 关键词: 闽楠 扦插 植物生长调节剂 调节机制 |
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| 基金项目:福建省林木种苗科技攻关五期项目“闽楠气培扦插及组培新技术研究” （KLh16H04A）；福建省水土保持试验站项目“长汀县红壤侵蚀区人工群落演变特征及改造提升技术研究”（KH180280A） |
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| Effects of plant growth regulators on Phoebe bournei cutting propagation |
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CHEN Laihe,WANG Yan,YANG Zhijian,et al
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| Abstract: |
| 【Objective】This study investigated the effects of plant growth regulators on rooting,growth,physiology and biochemistry of Phoebe bournei cutting seedlings and analyzed related mechanisms.【Method】Using the orthogonal experimental design,the effects of different plant growth regulators with different concentrations and treatment durations on rooting rate,growth and physiological and biochemical indexes of Phoebe bournei cuttings were measured.【Result】The best treatment for rooting of cuttings and growth of seedlings was NAA solution at 400 mg/L solution for 6 h.The hormone type had the largest effects on Phoebe bournei cuttings and seedlings.The most important indexes for rooting were IAAO enzyme activity,stem weight and MDA content.The most important indexes for seedling growth were primary root length,MDA content and PPO enzyme activity.【Conclusion】Selecting cuttings with high stem weight,soaking cuttings with 400 mg/L NAA solution for 6 h,and improving IAAO activities are suggested to improve rooting rate,protect cell vitality,and promote growth of primary root and new shoots of Phoebe bournei cuttings seedling. |
| Key words: Phoebe bournei cutting plant growth regulator regulation mechanism |
