中文摘要：

该文研究了南亚热带不同生活型植物的耐阴性，为城市绿化植物选择配置提供实验依据．选取25种南亚热带植物的盆栽幼苗作为试验材料，其种类包括目前正在推广的园林植物和采自森林的灌木和地被植物，用LI-6200光合作用测定系统等仪器测定各种植物叶片的形态特征、光合作用和光合-光响应曲线，包括叶片厚度（LT）、叶面积（LA）、比叶面积（SLA）、含水量（LWC）、叶绿素含量（Chl）、叶绿素a，b值（Chl a／b）、光合速率（Pn）、暗呼吸速率（Ra）、光补偿点（LCP）、光饱和点（LSP）和表观量子效率（Φ）等生理指标，并对测定结果进行方差分析、相关分析和聚类分析，比较分析植物的耐阴程度．结果表明，25种植物可分为3类：第1类为耐阴性较强的硬枝老鸭嘴、百两金、野芋、桢桐、板蓝根、狮子尾、红背桂、虾脊兰、宫粉郁金和黑骨蕨等10种，第2类为耐阴性中等的石柑子、大花鸳鸯茉莉、北江砂仁、崖爬藤、合果芋和华南胡椒等6种，第3类为耐阴性相对较弱的可爱花、鸡爪兰、咖啡、扇蕨、棕叶九尾草、草果、千年健、大叶仙茅和虎舌红等9种．Pn与Chla，b值和R。呈显著的正相关，与Chlb呈显著的负相关；LCP与脚呈显著正相关；Chlb与Chla和Chla＋b呈极其显著正相关，与Chla／b呈显著负相关；SLA与幽呈显著正相关，与LWC呈极其显著正相关．

英文摘要：

In this paper the authors presented a comparative study on shade-tolerance of low subtropical plants of different life forms, to provide experimental data in the selection for urban greenery. And the authors chose seedlings of 25 species, consisting of garden and understory plants from local forests and low subtropical areas in order to determine morphological characteristics of leaves and photosynthesis as well as photosynthetic light response curves using a LI-6200 portable photosynthetic system. The following measurements were made： physiological indices of leaf thickness （LT）, leaf area （ LA ）, specific leaf area （ SLA ）, water content （LWC）, chlorophyll content （Chl）, chlorophyll a/b ratio （Chl a/b）, photosynthetic rate （Pn）, dark respiration rate （ Rd ）, light compensation point （ LCP）, light saturation point （LSP） and apparent quantum yield （~）. The measured data were analyzed for correlation and a cluster analysis was applied. Results showed that all 25 plant species could be classified into three groups of shade-tolerance by hierarchical cluster analysis ： 1 ） ten plants of strongly shade-tolerant ： Thunbergia erecta, Ardisia crenata, Colocasia antiquorum,Clerodendrum japonicum, Baphicacanthus cusia , Calanthe discolor, Curcuma kwangsiensis and Adiantum flabellulatum; 2） six plants are intermediate in shade-tolerance： Pothos chinensis, Brunfelsia calycina, Amomum villosum, Tetrastigma obtectum, Syngonium podophyllum and Piper austrosinense; 3 ） nine plants have low shade-tolerance： Eranthemum austrosinensis, Chloranthus spicatus, Coffea arabica, Neocheiropteris palmatopedata, Setaria palmifolia, Amomum tsao-ko, Homalomena occulta, Curculigo capitulate and Ardisia mamillata. There was a significant positive correlation between Pn and Chl a/b ratio as well as Rd, and a significant negative correlation between Pn and Chl b; the positive correlation between LCP and LSP was also significant; the positive correlation of Chl b and Chl a as well as Chl