Temperature acclimation of photosynthesis: mechanisms involved in the changes in temperature dependence of photosynthetic rate
Temperature acclimation of photosynthesis: mechanisms involved in the changes in temperature dependence of photosynthetic rate
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DOI：
10.1093/jxb/erj049
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发表时间：
2006-01-01
影响因子：
6.9
通讯作者：
Onoda, Y
中科院分区：
文献类型：
--
作者：
Hikosaka, K;Ishikawa, K;Onoda, Y
生长温度改变光合速率的温度依赖性（温度驯化）。在许多物种中，使光合速率最大化的最佳温度随着生长温度的增加而增加。在这篇综述中，讨论了光合作用温度曲线变化的机制。根据光合作用的生化模型，光合温度曲线的变化可归因于四个因素：细胞间CO2浓度、RuBP（核酮糖-1,5-二磷酸）羧化最大速率活化能（V-c max）、RuBP再生速率活化能（J(max)）和J（max）与V-c max之比。随着生长温度的升高，各树种的V-c max活化能均呈上升趋势。其他因子随生长温度的变化而变化，但不同种间的响应不同。在这些因素中，V-c max活化能可能是影响环境CO2浓度下光合作用最佳温度变化的最重要因素。讨论了这些参数变化的生理生化原因。
Growth temperature alters temperature dependence of the photosynthetic rate (temperature acclimation). In many species, the optimal temperature that maximizes the photosynthetic rate increases with increasing growth temperature. In this minireview, mechanisms involved in changes in the photosynthesis-temperature curve are discussed. Based on the biochemical model of photosynthesis, change in the photosynthesis-temperature curve is attributable to four factors: intercellular CO2 concentration, activation energy of the maximum rate of RuBP (ribulose-1,5-bisphosphate) carboxylation (V-c max), activation energy of the rate of RuBP regeneration (J(max)), and the ratio of J(max) to V-c max. In the survey, every species increased the activation energy of V-c max with increasing growth temperature. Other factors changed with growth temperature, but their responses were different among species. Among these factors, activation energy of V-c max may be the most important for the shift of optimal temperature of photosynthesis at ambient CO2 concentrations. Physiological and biochemical causes for the change in these parameters are discussed.