Ramge P, Badeck F-W, Plöchl M, Kohlmaier G H
Institute for Physical and Theoretical Chemistry, Johann Wolfgang Goethe University, Marie-Curie-Strasse 11, D-60439 Frankfurt/Main, Germany.
New Phytol. 1993 Dec;125(4):771-785. doi: 10.1111/j.1469-8137.1993.tb03927.x.
Uptake of NO via stomata and its elimination in the mesophyll are investigated by use of mathematical models. Systems of differential equations describe simultaneous diffusion and reaction of the chemical species taken into account. The common hypothesis, postulating the disproportionation reaction of NO being the predominant path for the transformation of NO into the cellular nitrate and nitrite pools, could be false because of its failure to reproduce the measured sorption characteristics. If however the reduction of the pro-oxidative NO by apoplastic ascorbate is taken into account the calculated uptake rates and the effects of changes in immission concentration and vegetational characteristics fit well within corresponding experimental results. The onset of acute injury in case of a fall in apoplastic ascorbate concentration below a critical level is postulated.
通过数学模型研究了一氧化氮（NO）通过气孔的吸收及其在叶肉中的消除。考虑到化学物质的同时扩散和反应，用微分方程组进行描述。通常假设NO的歧化反应是NO转化为细胞内硝酸盐和亚硝酸盐库的主要途径，但由于无法再现测量的吸附特性，该假设可能是错误的。然而，如果考虑到质外体抗坏血酸对促氧化NO的还原作用，计算出的吸收速率以及排放浓度和植被特征变化的影响与相应的实验结果非常吻合。假设当质外体抗坏血酸浓度降至临界水平以下时会发生急性损伤。
