首页|基于光响应机理模型的不同植物光合特性

基于光响应机理模型的不同植物光合特性

Photosynthetic characteristics of different plant species based on a mechanistic model of light-response of photosynthesis

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  • 国家科技期刊平台
  • NETL
  • NSTL
  • 万方数据
  • 维普
为了研究不同植物的光合特性,用LI-6400-40B荧光仪同时测量了葎草(Humulus scandens)、白泡桐(Paulownia fortunei)、龙葵(Solanum nigrum)的电子传递速率和光合作用对光的响应曲线.利用植物光合电子流对光响应和光合作用对光响应的机理模型研究了这3种植物光合特性的差异及其产生的原因.结果表明:葎草的叶绿素含量最低,但其捕光色素分子的本征光能吸收截面最大;白泡桐的叶绿素含量是龙葵的1.2倍,但这两种植物的最大电子传递速率没有差异.产生这种差异的原因是:龙葵的捕光色素分子的本征光能吸收截面要比白泡桐大,而它处于激发态的最小平均寿命要比白泡桐短,且龙葵的电子利用效率要比白泡桐大.此外,捕光色素分子的有效光能吸收截面和处于激发态的捕光色素分子对光响应曲线的差异也有可能影响它们的光合特性.
To investigate the photosynthetic characteristics of Humulus scandens,Paulownia for tunei and Solanum nigrum,the light-response curves of photosynthetic electrons and photosynthesis were measured simultaneously by LI-6400-40B chlorophyll fluorometer.Then the differences in the photosynthetic characteristics of these plants and their courses were studied based on a mechanistic model of light-response of photosynthetic electron flow and photosynthesis.The results showed that H.scandens had the lowest chlorophyll content,while its eigen-absorption crosssection was the maximum.The chlorophyll content of P.fortunei was 1.2 times as much as that of S.nigrum,while the electron transport rates of both plants were almost same.The main reasons that determine the differences of photosynthetic characteristics of different plant species are:(1) the eigen-absorption cross-section of light-harvesting pigments of S.nigrum was greater than that of P.fortunei;(2) the minimum average lifetime of photosynthetic pigment molecules in the excited state for S.nigrum was shorter than that of P.fortunei;and (3) the use efficiency of photosynthetic electron of S.nigrum was higher than that of P.fortunei.Moreover,the photosynthetic characteristics of the plants were probably affected by the light-response of the effective light absorption cross-section of photosynthetic pigments and the light-response of the photosynthetic pigments in the lowest excited state.

photosynthesisphotosynthetic characteristicsmechanistic modelphotosynthetic electron use efficiencyeffective light energy absorption cross-section

叶子飘、胡文海、闫小红、段世华

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井冈山大学数理学院,江西吉安343009

井冈山大学生命科学学院,江西吉安343009

南京林业大学生物与环境学院,南京210037

光合作用 光合特性 机理模型 光合电子利用效率 有效光能吸收截面

国家自然科学基金江西省自然科学基金

3156006920142BAB20402

2016

10.13292/j.1000-4890.201609.032

生态学杂志
中国生态学学会

生态学杂志

CSTPCDCSCD北大核心
影响因子：1.439
ISSN：1000-4890
年,卷(期)：2016.35(9)
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