斐济贝壳杉白化苗与正常苗形态及生理特性比较.pdfVIP

2017,46(1): 20 ～24. Subtropical Plant Science 斐济贝壳杉白化苗与正常苗形态及生理特性比较 黄小萍 (厦门市园林植物园，福建 厦门 361003) 摘 要：比较研究斐济贝壳杉Agathis macrophylla 实生白化苗与正常苗在形态、叶片显微结构和部分生理生化 指标方面的差异。结果表明，斐济贝壳杉白化苗的种壳大小、株高、株重、叶长、茎粗、主根长、叶绿素含量 均低于正常苗，但白化苗的淀粉酶活性、可溶性蛋白质含量、吲哚乙酸氧化酶活性及色氨酸含量均高于正常苗。 关键词：斐济贝壳杉；白化苗；异常形态；酶活性 Doi: 10.3969/j.issn.1009-7791.2017.01.004 中图分类号：Q944.3 文献标识码：A 文章编号：1009-7791(2017)01-0020-05 Comparison on Morphological and Physiological Characteristics Between Albino and Normal Seedlings of Agathis macrophylla HUANG Xiao-ping (Xiamen Botanical Garden, Xiamen 361003, Fujian China) Abstract: The morphology, microstructure of leaf and some physiological and biochemical indices of albino and normal seedlings of Agathis macrophylla were observed and compared. The results showed that the size of seed shell, the height and weight of plant, the length of leaf and taproot, the stem diameter and the chlorophyll content of albino seedlings were less than those of normal seedlings, but the amylase activity, soluble protein content, IAA oxidase activity and tryptophan content of albino seedlings were more than those of normal seedlings. Key words: Agathis macrophylla ; albino seedling; abnormal morphology; enzymatic activity 斐济贝壳杉Agathis macrophylla 为南洋杉科Araucariaceae 贝壳杉属植物，原产斐济、所罗门岛、瓦 [1] 努阿图。乔木，株高可达20 m 以上；雌雄同株 。厦门市园林植物园于1979年引进斐济贝壳杉种子， 播种后成活，但现仅存1株，株高13.7 m，胸径为44.6 cm ，生长良好，每年开花、结果，具有良好的观 赏价值。但在斐济贝壳杉播种繁殖过程中，出现了一定比例的白化苗，子叶完全伸展后不久即死亡， 对生产造成一定影响。 白化苗是植物变异现象