| 引用本文: | 蒋迎红, 刘雄盛, 蒋 燚, 何应会, 项文化.濒危植物海南风吹楠营养器官解剖结构特征[J].广西植物,2018,38(7):843-850.[点击复制] |
| JIANG Yinghong, LIU Xiongsheng, JIANG Yi, HE Yinghui, XIANG Wenhua.Anatomical structure characteristics of vegetative organs of endangered plant Horsfieldia hainanensis[J].Guihaia,2018,38(7):843-850.[点击复制] |
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| 濒危植物海南风吹楠营养器官解剖结构特征 |
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蒋迎红1,2, 刘雄盛3, 蒋 燚3, 何应会3, 项文化1*
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1. 中南林业科技大学 生命科学与技术学院, 长沙 410004;2. 广西壮族自治区林业厅保护处, 南宁 530028;3. 广西壮族自治区林业科学研究院 广西优良用材林资源培育重点实验室, 南宁 530002
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| 摘要: |
| 该研究采用石蜡切片和光学显微技术,对海南风吹楠营养器官的解剖结构及其对环境的适应性进行了探讨。结果表明:海南风吹楠为典型异面叶,叶片中脉发达,中部分化出髓,上表皮外侧具角质层,内侧具1层内皮层,下表皮外侧无角质层,有气孔器分布,气孔器为双环型,略下陷; 栅栏组织3～4层细胞,海绵组织4～6层细胞。茎的初生结构中表皮轻微角质化,维管束为外韧型,8～10个初生维管束围绕髓排列为1轮; 茎的次生结构中,表皮外部角质层加厚,维管柱紧密排列连成环状,次生韧皮部和次生木质部发达,形成层细胞3～5层。根的初生结构中表皮细胞外壁加厚,外皮层细胞体积大,形状不规则,内侧具1层形成层,内皮层具凯氏带,初生木质部为多原型,呈辐射状排列。根的次生结构中木栓层细胞5～6层,木栓层内侧具1层木栓形成层,栓内层细胞3层。海南风吹楠营养器官具有一定耐阴和耐旱结构特征,同时与其生活的热带雨林沟谷中高温荫湿的环境相适应。 |
| 关键词: 海南风吹楠, 营养器官, 解剖结构, 环境适应性 |
| DOI：10.11931/guihaia.gxzw201707020 |
| 分类号:Q944.53, Q246 |
| 文章编号:1000-3142(2018)07-0843-08 |
| 基金项目:国家林业局部门预算广西项目支出预算项目(2013008)[Supported by Expenditure Budget Program of Guangxi Program in the State Forestry Administration Department Budget(2013008)]。 |
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| Anatomical structure characteristics of vegetative organs of endangered plant Horsfieldia hainanensis |
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JIANG Yinghong1,2, LIU Xiongsheng3, JIANG Yi3, HE Yinghui3, XIANG Wenhua1*
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1. College of Life Sciences and Technology, Central South University of Forestry and Technology, Changsha 410004, China;2. Department of
Forestry Protection of Guangxi Zhuang Autonomous Region, Nanning 530028, China;3. Forestry Research Institute of Guangxi
Zhuang Autonomous Region, Guangxi Key Laboratory of Superior Trees Resource Cultivation, Nanning 530002, China
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| Abstract: |
| The anatomy structures of vegetative organs of Horsfieldia hainanensis were studied by paraffin-sectioning and optical microtechnique to explore its adaptability to environment. The results showed that the leaves of H. hainanensis belonged to typical bifacial leaf, leaf blade-midribs was well-developed and the middle part had differentiated into pith. There was cuticle on the outside of upper epidermis of leaf and one layer endodermis inside. There was no cuticle on the outside of lower epidermis, and the sunken stomata were bicyclical type distributed. There were 3-4 layer cells in palisade tissue and 4-6 layer cells in spongy tissue. In the primary structure of stem, the epidermis was slightly keratinized, and the vascular bundle was ectophloic type. The 8-10 primary vascular bundles arranged around the pith were round. In the secondary structure of stem, the outer cuticle of epidermis was thickened, vascular bundles were closely arranged into rings, the secondary phloem and secondary xylem were developed, and there were 3-5 layer cells in cambium. In the primary structure of the root, the outer walls of epidermal cells were thickened. The exodermis cells were large and irregular in shape, with one layer endodermis in the inner layer. There was casparian strip in the endodermis. The primary xylem was polyarch, with a radial arrangement. In the secondary structure of root, there were 5-6 layer cells in cork layer. There was one layer of cork cambium in the inner cork layer and three layer cells in phelloderm. The vegetative organs of H. hainanensis had a certain shade and drought tolerance structure characteristics. Meanwhile, those anatomical characteristics were adaptable to the environment of high temperature and humidity in valleys of tropical rainforest. |
| Key words: Horsfieldia hainanensis, vegetative organ, anatomical structure, environmental adaptability |
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