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| 不同生境三种杜鹃属植物花特征比较 |
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胡德美1, 3, 董 溪1, 3, 吴江明3, 胡莲宇3, 唐 明1,2, 王晓月1,2*
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1. 贵州师范大学 西南喀斯特山地生物多样性保护国家林业和草原局重点实验室, 贵阳 550025;2. 贵州师范大学
贵州省植物生理与发育调控重点实验室, 贵阳 550025;3. 贵州师范大学 生命科学学院, 贵阳550025
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| 摘要: |
| 生境影响植物花部特征的分化。为探究不同人为干扰强度生境是否影响杜鹃花特征分化和资源分配,以及不同颜色杜鹃花分布情况,该研究以百里杜鹃保护区高、中、低人为干扰强度生境的马缨杜鹃、迷人杜鹃和露珠杜鹃为实验材料,采用五点取样法统计不同生境杜鹃花的植株数量,游标卡尺测量花部特征,光学显微镜统计花粉数,海洋光谱仪测定花色的反射光谱,Gephi软件绘制植株数量的网络图。结果表明:(1)迷人杜鹃植株数量显著多于马缨杜鹃和露珠杜鹃。(2)低强度干扰生境中,马缨杜鹃的营养器官和繁殖器官特征指数大于高、中强度干扰生境; 不同干扰强度生境对迷人杜鹃花部特征的影响不明显; 中、低干扰强度生境露珠杜鹃的营养器官和繁殖器官特征指数显著大于高强度干扰生境。(3)马缨杜鹃和迷人杜鹃的花色在400～500 nm波长有较高的反射,露珠杜鹃的花色在400～700 nm波长有较高的反射。(4)在高、中强度干扰生境中,迷人杜鹃与其他两种杜鹃花分布紧密,在低强度干扰生境中马缨杜鹃和迷人杜鹃分布更紧密。该研究对杜鹃花的种群管理和生物多样性保护提供重要的理论基础。 |
| 关键词: 杜鹃花属, 生境, 花部特征, 花色, 网络结构图 |
| DOI：10.11931/guihaia.gxzw202008038 |
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| 文章编号:1000-3142(2022)01-0161-13 |
| Fund project:国家自然科学基金(31901208); 国家自然科学基金委员会贵州省人民政府喀斯特科学研究中心项目(U1812401); 贵州省科学技术基金资助项目(2019/1237); 贵州师范大学博士科研启动项目(2017/22)[Supported by the National Natural Science Foundation of China(31901208); the Joint Fund of the National Natural Science Foundation of China and the Karst Science Research Center of Guizhou Province(U1812401); Funded by the Science and Technology Foundation of Guizhou Province(2019/1237); Doctoral Research Project of Guizhou Normal University(2017/22)]。 |
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| Comparison of floral traits of three Rhododendron species in different habitats |
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HU Demei1,3, DONG Xi1,3, WU Jiangming3, HU Lianyu3, TANG Ming1,2, WANG Xiaoyue1,2*
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1. State Key Laboratory of Southwest Karst Mountain Biodiversity Conservation of National Forestry and Grassland Administration, Guizhou Normal
University,Guiyang 550025, China;2. Key Laboratory of Plant Physiology and Development in Guizhou Province, Guizhou Normal
University, Guiyang 550025, China;3. College of Life Science, Guizhou Normal University, Guiyang 550025, China
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| Abstract: |
| Habitats influent the divergence of floral traits. To test whether habitats change could affect the floral traits and resources allocation of Rhododendron plants and investigate the distribution of Rhododendron plants in different colors. R. delavayi, R. agastum and R. irroratum in high, medium and low intensity human interference habitats were taken as materials. Five-point sampling method was used to count the number of Rhododendron plants in different habitats, floral traits were measured by a vernier caliper, the number of pollen grains were counted by a light microscope, the spectral reflectance of colors was measured by an ocean spectrometer, and the Gephi software was used to draw network diagrams of the number of plants. The results were as follows:(1)The plant number of R. agastum was significantly higher than that of R. delavayi and R. irroratum.(2)The trait indexes of vegetative and reproductive organs of R. delavayi in low intensity interference habitat were higher than those in high and medium intensity interference habitats; Different intensity interference habitats had no significant influence on floral traits of R. agastum; The trait indexes of vegetative and reproductive organs of R. irroratum in medium and low intensity interference habitats were significantly higher than those in high intensity interference habitats.(3)The colors of R. delavayi and R. agastum showed higher reflection values at 400-500 nm wavelengths, while colors of R. irroratum showed higher reflection values at 400-700 nm wavelengths.(4)R. agastum was distributed closely with the other two species of Rhododendron in high and medium intensity interference habitats, while R. delavayi and R. agastum were more closely distributed in low intensity interference habitat. This study provides a crucial theoretical basis for the population management and biodiversity conservation of Rhododendron species. |
| Key words: Rhododendron, habitats, floral traits, flower colors, diagram of community network structure |
