首页 > 过刊浏览>2013年第21卷第6期 >489-495. DOI:10.3969/j.issn.1005-3395.2013.06.001
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鼎湖山季风常绿阔叶林不同生境蕨类植物的叶片功能性状研究
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中科院华南植物园

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中国科学院知识创新工程重要方向项目(KSCX2-EW-J-28)资助


Leaf Functional Traits of Ferns from Different Habitats in Monsoon Evergreen Broad-leaved Forest in Dinghushan Mountain
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South China Botanical Garden

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    摘要:

    为了解不同生境中蕨类植物的叶片功能,对鼎湖山季风常绿阔叶林中的6 种优势蕨类植物的比叶面积、光合速率、元素含量、构建成本和水分利用效率等叶片性状进行了测定,研究了它们对环境的适应性。研究结果表明,两种附生蕨类(江南星蕨和崖姜蕨)的叶片具有较低的比叶面积(SLA)和光合速率(Aarea),较高的构建成本(CCarea)和碳同位素比率(δ13C)。而两种林下土生蕨类(扇叶铁线蕨、桫椤)具有较高的Aarea 和较低的δ13C。生长在岩石基质上的中华里白具有最高的养分利用效率和较高的δ13C。生长在溪流边的薄叶卷柏具有最高的SLA,最低的CCarea 和δ13C。这些揭示了蕨类植物叶片性状与生境之间具有紧密的相关性。由于附生蕨类的叶片具有高的能量投资和低的光合速率,对环境变化的适应能力弱,附生蕨类可能面临较大的生存压力。

    Abstract:

    The aim was to understand the leaf function of ferns grown under different habitats. The leaf characters of six ferns, such as specific leaf area, gas exchange rates, leaf nutrients, construction cost, and carbon isotope ratio, in monsoon evergreen broad-leaved forest in Dinghushan Mountain were measured, and their adaption to environment were studied. The results showed that two epiphytic ferns (Microsorum fortune and Pseudodrynaria coronans) had low specific leaf area (SLA) and photosynthetic rates (Aarea), but high leaf construction cost (CCarea) and carbon isotope ratio (δ13C). In contrast, two terrestrial ferns (Adiantum flabellulatum and Alsophila spinulosa) showed high Aarea and relative low δ13C. Hicriopteris chinensis growing on bared rocks at forest edge had the lowest leaf phosphorus contents, and the highest photosynthetic phosphorus use efficiency among the six fern species, while Selaginella delicatula growing in streamside had the highest SLA, and the lowest CCarea and δ13C. Therefore, it was suggested that there were close relationship between leaf traits of ferns and environment. In addition, because of high energy investment and low photosynthetic rate, epiphytic ferns have low adaption ability to environment, their survive might be under great pressure.

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宋娟,李荣华,朱师丹,叶清.鼎湖山季风常绿阔叶林不同生境蕨类植物的叶片功能性状研究[J].热带亚热带植物学报,2013,21(6):489~495

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  • 收稿日期:2013-03-29
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