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Plant Diversity ›› 2010, Vol. 32 ›› Issue (05): 420-426.DOI: 10.3724/SP.J.1143.2010.10071

• 研究论文 • 上一篇    下一篇

温度对铁皮石斛生长及生理特性的影响

艾娟1、2,严宁1,胡虹1   

  1. 1 中国科学院昆明植物研究所,云南 昆明650204;2 中国科学院研究生院,北京100049
  • 收稿日期:2010-04-02 出版日期:2010-10-25 发布日期:2010-07-30
  • 基金资助:

    国家自然科学基金(30770225,30870239);云南省应用基础研究项目(2007C0012)及中科院科技支黔工程项目

Effects of Temperature on the Growth and Physiological Characteristics of Dendrobium officinale (Orchidaceae)

 AI  Juan-1、2, YAN  Ning-1, HU  Hong-1   

  1. 1 Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650204, China;
    2 Graduate University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2010-04-02 Online:2010-10-25 Published:2010-07-30

摘要:

通过不同温度下的控制实验,研究了铁皮石斛光合作用与生长对温度的响应,以期为铁皮石斛的栽培提供理论依据。温度对铁皮石斛的光合速率(Pn)有明显影响,30℃处理的植株具有最高的饱和光合速率(Pmax) ,其较高的光合速率与RuBP电子传递速率与羧化速率间相对平衡有关。温度对铁皮石斛茎的生长及多糖含量有明显影响,20℃处理的石斛多糖含量显著性的高于其他两个处理,而茎长、茎节数、茎鲜重等则是在30℃下最高。结果表明,30℃的温度对铁皮石斛的光合作用较为适宜,但在20℃条件下植株具有更高的多糖含量。

关键词: 铁皮石斛, 光合速率, 叶片性状, 温度, 多糖

Abstract:

In this paper, we studied the response of photosynthesis and growth in Dendrobium officinale to temperature under the control experiment to provide a theoretical basis for its cultivation. Temperature had a significant effect on the photosynthetic rate (Pn) of Dofficinale. The light saturated photosynthesis at ambient CO2 concentration (Pmax) of the plants were highest at 30℃. High photosynthetic rate at 30℃ were related to the more balance between the maximum rate of electron transport and maximum rate of RuBPmediated carboxylation. Moreover temperature also showed a significant effect on the growth and polysaccharide content of D.officinale′s stem. The polysaccharide content of Dofficinale at 20℃ was significantly higher than that at other temperatures, while the stem length, stem node number, stem fresh weight and stem dry weight were achieved the highest point at 30℃. The results showed that, the temperature of 30℃ was more appropriate for the photosynthesis of Dofficinale, while the plants at 20℃ have higher polysaccharide content.

Key words: Dendrobium officinale, Photosynthetic rate, Leaf traits, Temperature, Polysaccharide

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