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

doi:10.3724/SP.J.1143.2010.10071

Abstract

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

CLC Number:

Q 945

AI Juan-, YAN Ning-, HU Hong. Effects of Temperature on the Growth and Physiological Characteristics of Dendrobium officinale (Orchidaceae)[J]. Plant Diversity, 2010, 32(05): 420-426.

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