Sandermann Heinrich
Ecotox.freiburg, Schubertstr. 1, D-79104 Freiburg, Germany.
Biochem Biophys Res Commun. 2008 Feb 8;366(2):271-4. doi: 10.1016/j.bbrc.2007.12.018. Epub 2007 Dec 17.
The ascorbate pools of the extracellular respiratory lining fluids and the plant apoplast are currently considered as part of the first line of defence against ambient ozone. Ozone is in fact rapidly decomposed by ascorbate, but the only product identified so far (singlet oxygen) is toxic. Peroxy-l-threonic and peroxy-oxalic acids are now derived as further decomposition products on the basis of Criegee-type ozone chemistry. These secondary toxicants may resemble known ozone induced transmitter molecules by participating in signalling events affecting plant and animal innate immunity.
细胞外呼吸内衬液和植物质外体中的抗坏血酸池目前被认为是抵御环境臭氧的第一道防线的一部分。事实上，臭氧会被抗坏血酸迅速分解，但迄今为止确定的唯一产物（单线态氧）是有毒的。基于克里格型臭氧化学，现在推导得出过氧 -l- 苏糖酸和过氧草酸是进一步的分解产物。这些次生毒物可能通过参与影响植物和动物固有免疫的信号传导事件，类似于已知的臭氧诱导的递质分子。
