What limits CO2 diffusion inside leaves? Dissecting the diffusion path with Arabidopsis mutants.

人类引起的大气中二氧化碳的增加现在被普遍认为是全球变暖的原因之一。预测我们未来的影响依赖于陆地光合作用的模型，该模型利用植物在光合作用过程中产生的大气特征来辨别碳的重稳定同位素。同位素之间的区分受到叶片内二氧化碳扩散的影响，这一过程的关键步骤将通过使用拟南芥突变体来确定。在模型中更好地表达这一过程将改善对陆地光合作用的估计和气候变化的预测

Human induced increase in atmospheric carbon dioxide is now generally accepted as contributing to global warming. Forecasting our future impact relies on models of terrestrial photosynthesis which use a signature in the atmosphere created by plants when they discriminate against the heavy stable isotope of carbon during photosynthesis. Discrimination between isotopes is affected by carbon dioxide diffusion within leaves and key steps in this process will be identified through the use of Arabidopsis mutants. Better representation of this process in models will improve estimates of terrestrial photosynthesis and climate change forecasts