摘要
光合作用对大气中CO2浓度升高适应的可能原因主要表现在以下几个方面:由于CO2浓度升高,碳水化合物过量积累,光合电子传递链中质体醌与过氧化氢(H2O2)的氧化还原信号对光合作用发生反馈抑制;核酮糖1,5-二磷酸羧化/加氧酶(Rubisco)的含量及其活性下降;气孔状态发生变化。此外,植物体内C/N平衡、生长调节物质和己糖激酶对光合基因表达水平的调控等多个方面会对光合适应产生影响。
The photosynthetic acclimation mechanism to elevated atmospheric carbon dioxide has been explained by several hypotheses： the feedback restraint on photosynthesis caused by carbohydrate deposits and redox signals arising from the plastoquinone pool and the accumulation of hydrogen peroxide; decreased rubisco content and activity induced by levels of rubisco subunit mRNA; and changes in stomatal states. In addition, the level of photosynthesis gene expression induced by C/N balance, plant growth regulators and hexoses might also result in photosynthetic acclimation.
出处
《植物学通报》
CSCD
北大核心
2005年第4期486-493,共8页
Chinese Bulletin of Botany
基金
国家自然科学基金项目(30270800和40231003)资助。
