Li Miao-miao
Huan Jing Ke Xue. 2015 May;36(5):1888-901.
In order to investigate the effect of ozone on photosynthesis of Machilus pauhoi, Lindera setchuenensis, Phoebe bournei, Phoebe chekiangensis and Machilus thunbergii, the study was carried out in 12 open-top chambers( OTCs) with different levels of ozone in Qianyanzhou experimental station, and net photosynthesis rate (Pn) and stomatal conductance (Cond) were detected. The results indicated that ozone treatments changed the variation trend of photosynthesis of all tested plants, but ozone exposure did not always play an inhibitory role on them. In fact, photosynthesis changed with ozone concentration, experimental period, season and specific species. Exposed to ozone could even promote Pn to a peak in a short term, and the indicator of plants treated with ozone was higher than that of the control at this point. Low and medium concentrations of ozone treatment enhanced Pn of Phoebe bournei and Machilus thunbergii. The peak of treatment group also came earlier because of ozone. Furthermore, the positive correlation between Pn and Cond did not existed under the condition of ozone. Machilus thunbergii had the strongest resistance to ozone, followed by Phoebe bournei, by comparison, Phoebe chekiangensis, Machilus pauhoi and Lindera setchuenensis were more sensitive.
为研究臭氧对闽楠、四川山胡椒、闽粤石楠、浙江楠和黑壳楠光合作用的影响，在千烟洲实验站的12个不同臭氧浓度的开顶式气室（OTC）中开展研究，并测定净光合速率（Pn）和气孔导度（Cond）。结果表明，臭氧处理改变了所有受试植物光合作用的变化趋势，但臭氧暴露对其并不总是起抑制作用。实际上，光合作用随臭氧浓度、实验时期、季节和特定物种而变化。暴露于臭氧甚至可在短期内促使Pn达到峰值，此时臭氧处理组植物的指标高于对照组。低浓度和中浓度臭氧处理提高了闽粤石楠和黑壳楠的Pn。由于臭氧作用，处理组的峰值也出现得更早。此外，在臭氧条件下，Pn与Cond之间不存在正相关关系。黑壳楠对臭氧的抗性最强，其次是闽粤石楠，相比之下，浙江楠、闽楠和四川山胡椒更敏感。
