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| 树干附生尖叶拟船叶藓性比和有性生殖的比例 |
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刘 冰1,2, 李 菁2*, 田启建1, 陈功锡1,2, 陈 军2
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1.吉首大学 城乡资源与规划学院, 湖南 张家界 427000;2.吉首大学 生态研究所, 湖南 吉首 416000
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| 摘要: |
| 通过对贵州梵净山树干附生尖叶拟船叶藓的野外调查和室内研究,结果表明,在44个被调查样方共计1 320株植株中,尖叶拟船叶藓单株的性比为8♀:1♂(N=1 320),其中25.0%的单株没有进行性表达; 其种群的性比为5♀:1♀♂(雌性种群:混合种群,N=44),没有发现雄性种群; 其单株的有性生殖的比例为10.5%,种群的有性生殖比例为9.3%。结果表明尖叶拟船叶藓种群具有明显的雌性偏向,其种群的自然更新更多的是依赖各种营养繁殖。 |
| 关键词: 尖叶拟船叶藓 树干附生苔藓 性比 有性生殖 |
| DOI： |
| 分类号:Q945.5 |
| Fund project: |
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| Sex ratios and rate of sexual reproduction in the epiphytic moss Dolichomitriopsis diversiformis |
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LIU Bing1,2, LI Jing2*, TIAN Qi-Jian1,
CHEN Gong-Xi1,2, CHEN Jun2
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1.College of Resources and Planning Sciences, Jishou University, Zhangjiajie 427000, China;2.Institute of Ecology, Jishou University, Jishou 416000, China
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| Abstract: |
| The moss Dolichomitriopsis diversiformis was found on many host tree trunk in Fanjing Mountain of Guizhou,China. A survey of 44 samples revealed an individual sex ratio of 8♀:1♂(female individuals:male individuals,N=1 320)with 25.0% individuals non-expressing,and an expressed population sex ratio of 5♀:1♀♂(female populations:mixed-sex populations,N=44)with no male population. The rate of individual sexual reproduction and the rate of population sexual reproduction were 10.5% and 9.3% respectively. The results indicated that there existed a remarkable female-biased phenomenon and natural populations were maintained via asexual reproduction in D.diversiformis. |
| Key words: Dolichomitriopsis diversiformis epiphytic moss sex ratio sexual reproduction |
