| 摘要: |
| 以3 a 生火力楠(Michelia macclurei) 袋装苗为试验材料，研究分析了3 种不同质量浓度梯度(0、50、100、150 mg/L) 的植物生长调节剂吲哚乙酸(IAA)、萘乙酸(NAA)、生根粉3 号(ABT-3) 对火力楠根系形态建成的影响。研究结果表明，3 种植物生长调节剂在不同程度上均能够促进火力楠根系的生长发育，且在不同质量浓度下对火力楠根系形态建成的促进作用存在着差异。采用主成分分析综合比较不同处理对火力楠根系形态的影响，得出IAA 在150 mg/L 时的促进作用最为明显。 |
| 关键词: 植物生长调节剂 火力楠 根系形态 |
| DOI： |
| 投稿时间：2017-06-08修订日期：2017-07-07 |
| 基金项目:中山市科技基金资助项目“适宜城镇绿化的乡土树种资源评价及育苗、种植关键技术研究”(4400-H13527)。 |
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| Effects of Three Kinds of Plant Growth Regulators on Root Morphology of Michelia macclurei |
| FANG Jianbo,DOU Ning,ZHANG Heng,ZHENG Shiya,CHEN Hongyue |
| (College of Forestry and Landscape Architecture,South China Agricultural University,Guangzhou Guangdong;Pubang Landscape Architecture Co Ltd,Guangzhou Guangdong) |
| Abstract: |
| Using the three-year-old Michelia macclurei as experimental materials, the effects of the three plant growth regulators (IAA, NAA, ABT-3) with different concentrations (0、50、100、150 mg/L) on the root morphology of M. macclurei were examined. The results showed that all three kinds of plant growth regulators could promote the root growth of M. macclurei in different degree, and different concentrations of the same growth regulators on the root morphology of M. macclurei were different. The effects of different treatments on root morphology of M. macclurei were studied by the principal component analysis, which showed that the promotion effect of IAA was the strongest at 150 mg/L. |
| Key words: plant growth regulator Michelia macclurei root morphology |
