3种沙地植物光合碳同化对环境因子的生理响应

doi:10.11707/j.1001-7488.20140924

Abstract

Abstract:

Physiological responses of the photosynthetic carbon assimilation of one-Year-old seedlings of three sandy plant species to environmental factors were studied. The results showed that (1) the variation in photosynthetic characteristics among the sandy plant species was larger in high light and high CO₂ concentration than those in low light (0-400 μmol ·m^-2 ·s^-1) and CO₂concentration (0-200 μmol ·mol^-1). The response curves of photosynthetic rate of Atraphaxis bracteata to light intensity, CO₂ concentration, temperature, and relative humidity were all located in the upper position to Morus alba and Apoceynum venetum in both July and September. (2) Photosynthetic parameters were significantly different between July and September in each species, with A. bracteata and M. alba having stronger photosynthetic capacity in July whereas A. venetum having stronger photosynthetic capacity in September.(3) A. bracteata was adapted to higher light intensity, CO₂ concentrations and temperature, showing to some degree characteristics of sun plants. M. alba was sensitive to temperature and was adapted to shade environments. A. venetum had weak ability to adapt to high light and low CO₂assimilation, but had a longer duration of CO₂assimilation during growing seasons.

Key words: response curve, photosynthetic carbon assimilation, ecological factor

CLC Number:

Q945.11
X173

Ning Husen, Luo Qinghong, Ji Xiaomin, Zhu Yajuan, Sun Huiying, Zhu Ling. Physiological Responses of the Photosynthetic Carbon Assimilation to Environmental Factors in three Sandy Plants[J]. Scientia Silvae Sinicae, 2014, 50(9): 173-179.

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Physiological Responses of the Photosynthetic Carbon Assimilation to Environmental Factors in three Sandy Plants

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