首页 > 过刊浏览>2021年第29卷第2期 >187-194. DOI:10.11926/jtsb.4269
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岩溶与非岩溶区典型植物最适光合模型和光合特征研究
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广西创新驱动发展专项（AA-17204087-9）；广西自然科学基金项目（2018GXNSFAA294023，2019GXNSFBA245036）；国家自然科学基金项目（41830648，31870382，32060243，32060369）；广西植物研究所基本业务费（18005）；广西喀斯特植物保育与恢复生态学重点实验室自主研究课题（19-A-04-03，18-A-02-01，19-050-6）；广西科学院基本业务费（2019YJJ1009）资助


Studies on Optimal Photosynthetic Biochemical Model and Photosynthetic Characteristics of Typical Plants in Karst and Non-karst Regions
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    摘要:

    为探讨不同生境典型植物光合特征对主要环境因子的响应，选择Ethier&Livingston、Ellsworth和Sharkey等3种光合生化模型拟合我国西南岩溶与非岩溶区8种典型植物的A-Ci曲线。结果表明，用Ethier & Livingston模型拟合的A-Ci曲线要优于Ellsworth模型和Sharkey模型，拟合方程的决定系数（R2）为0.98~0.99（P < 0.01）。从Ethier&Livingston模型拟合的Vcmax和Jmax来看，岩溶区和非岩溶区乡土植物间的差异不显著，但都显著低于外来速生植物尾巨桉（Eucalyptus grandis×E.urophylla）。岩溶区和非岩溶区乡土植物的光合特征参数（Vcmax，25和Jmax，25）均与空气温度和土壤水分含量呈显著相关（P < 0.05）。除非岩溶区乡土植物的Jmax，25外，所有植物的光合特征参数与土壤水分拟合方程的R2均低于其与环境温度的，表明环境温度对典型植物Vcmax，25和Jmax，25的影响强于土壤含水量。

    Abstract:

    The aim was to screen the optimal model in fitting photosynthetic CO2response curve (A-Ci curve) of plants in different habitats, three biochemical models, including Ethier & Livingston, Ellsworth, and Sharkey model, were used to fit the A-Ci curves of 8 typical plants in karst and non-karst regions of southwest China. Then the photosynthetic parameters and their response to main environmental factors were analyzed. The results showed that Ethier & Livingston model was better than the other two models in fitting A-Ci curve of 8 typical plants, with determination coefficient (R2) from 0.98 to 0.99 (P<0.01). The photosynthetic parameters (Vcmax and Jmax) fitted by Ethier & Livingston model had no significant differences between karst and non-karst native plants (P>0.05), but both of them were significantly lower than that of Eucalyptus grandis×E. urophylla. Moreover, Vcmax,25 and Jmax,25 of karst and non-karst native plants were significantly correlated with air temperature and soil water content (P<0.05). However, the determination coefficients (R2) between air temperature and Vcmax,25 or Jmax,25 were higher than that between soil water content and Vcmax,25/Jmax,25 for all plants except of Jmax,25 of non-karst native plants. Therefore, these indicated that the influence of air temperature on Vcmax,25 and Jmax,25 of typical plants in this area was stronger than that of soil water content.

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倪隆康,何文,黄科朝,顾大形,黄玉清.岩溶与非岩溶区典型植物最适光合模型和光合特征研究[J].热带亚热带植物学报,2021,29(2):187~194

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  • 收稿日期:2020-06-22
  • 最后修改日期:2020-08-18
  • 在线发布日期: 2021-03-20
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