玉山箭竹在不同光環境下葉片形態與生理特性的比較

吳昆松

doi:10.6342/NTU201702736

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玉山箭竹在不同光环境下叶片形态与生理特性的比较

The comparisons of leaf morphological and physiological traits of Yushania niitakayamensis growing under different light environments

吴昆松 , 硕士　　导师：高文媛　　

繁体中文 DOI： 10.6342/NTU201702736

玉山箭竹；叶片特徵；表型可塑性；遗传分化；纺锤细胞；种子萌芽及小苗生长； Yushania niitakayamensis ； leaf traits ； phenotypic plasticity ； genetic differentiation ； fusoid cell ； seed germination and seedling growth

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摘要 │ 参考文献 (127) │ 国际计量

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Yushania niitakayamensis (Bambusoideae; Poaceae), a perennial bamboo species, grows in full sunlight forming meadows or dominates the forest understory. In this study, I aimed to answer following questions. (1) In addition to plant heights, are there differences in leaf morphological, anatomical and photosynthetic traits between Y. niitakayamensis populations? (2) What are the effects of the aforementioned differences on Y. niitakayamensis growing in two habitats with different light regimes? (3) Are these differences caused by phenotypic plasticity or genetic variation? I also investigated seed germination and seedling growth of Y. niitakayamensis.
Significant differences in leaf length/width ratio, leaf area, stomatal density, leaf thickness, and chlorophyll content per unit mass were found between plants growing in meadow and in forest understory at He-huan mountains. Plants growing in forest understory had more fusoid cells (specialized mesophyll) intercellular space than plants growing in meadow. These differences would result in differences in leaf light absorptance, heat dissipation, water-use efficiency, and photosynthetic performance between the two populations. Plants from both habitats were transplanted and grown under two light treatments (full sun and 70 % shading) for eight months. Y. niitakayamensis expressed plastic phenotypes in leaf morphological, anatomical and photosynthetic traits in response to contrasting light environments. The adjustments in leaf physiological traits were faster than morphological traits in response to different light regimes. The occurrence of fusoid cell intercellular space is associated with growth light regimes. However, most of the aforementioned differences in leaf traits disappeared when plants from both habitats grown under the same light regime. Nevertheless, plants from different habitats showed differences in some leaf traits (e.g., leaf length/width ratio, light-saturated net photosynthetic rate and apparent quantum yield) and the degree of phenotypic plasticity in leaf thickness, nitrogen content per unit area and water-use efficiency in response to different light regimes indicating some genetic differentiation between the two populations.
The seeds, after palea and lemma being removed, of Y. niitakayamensis were not germinated synchronously indicating seed dormancy. Totally about 70 % of seeds were germinated, 187 days after sowing. The germinated seedlings were then grown under two light treatments (full sun and 70 % shading). Significant differences in leaf length, width, area, and the length of second internode, but not in plant height, were found between seedlings grown in different light environments for six months.

参考文献 ( 127 ) 〈TOP〉

林维治 (1974) 竹花形态之研究，台湾省林业试验所报告第248号，117页。
连结：
陈致仁 (2003) 玉山箭竹亲缘地理学探讨，国立台湾师范大学生物研究所硕士论文。
连结：
廖敏君 (2004) 玉山箭竹繁殖生物学之探讨，国立中兴大学森林学系硕士班硕士论文。
连结：
Adatia, M. H., & Besford, R. T. (1986). The effects of silicon on cucumber plants grown in recirculating nutrient solution. Annals of Botany, 58, 343-351.
连结：
Agata, W., Hakoyama, S., & Kawamitsu, Y. (1985). Influence of light intensity, temperature and humidity on photosynthesis and transpiration of Sasa nipponica and Arundinaria pygmaea. The Botanical Magazine, Tokyo, 98, 125-135.
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DOI可强化引用精确性、增强学术圈连结，并给予使用者跨平台的良好使用经验，目前在全世界已有超过五千万个对象申请DOI。如想对DOI的使用与概念有进一步了解，请参考（）。