论文部分内容阅读
近年来对SO_2损伤机制的研究结果证实,通过气孔进入叶片的SO_2会进行:SO_2十H_2O→H_2SO_3(?)H~++HSO_3~-(?)2H~++SO_3~(2-)的毒性反应,致使细胞内H~+的释放,同时在SO_3~(2-)氧化为SO_4~(2-)的过程中产生大量的活性氧自由基(如OH,O_2~-,H_2O_2等)毒害细胞.因此,有必要研究SO_2侵入叶片后的损伤机制和过程.用毛白杨叶片的低水平化学发光(简称LCL)来检测SO_2的污染,马玉琴等人研究已有良好开端.通过薰蒸实验,发现在SO_2急性损伤条件下,叶片的
In recent years, the research on the mechanism of SO 2 damage confirmed that the SO 2 entering the leaf through the stomatal aperture would be: SO 2 + H 2 O → H 2 SO 3 + H ~ ++ HSO 3 ~ - 2H ~ ++ SO 3 2- Reaction, resulting in the release of intracellular H ~ +, while a large number of reactive oxygen species (such as OH, O_2 ~ -, H_2O_2, etc.) poisoned cells during SO_3 ~ (2-) oxidation to SO_4 ~ (2-) Therefore, it is necessary to study the mechanism and process of damage after SO_2 invades the leaf.Using low level chemiluminescence (LCL) of Populus tomentosa leaf to detect SO_2 pollution, Ma Yuqin and others have a good start.From the fumigation experiments, Under the condition of acute damage of SO_2,