Effects of ozone on photosynthetic CO2 exchange, chlorophyll a fluorescence and antioxidant systems in lettuce leaves

被引：69
作者：
Calatayud, A
Ramirez, JW
Iglesias, DJ
Barreno, E
机构：
[1] Univ Valencia, Fac Ciencias Biol, Dept Biol Vegetal, E-46100 Valencia, Spain
[2] IVIA, Dept Citricultura, Conselleria Agr Pesa & Alimentac, Ctra Moncada Naquera, Valencia 46113, Spain
来源：
PHYSIOLOGIA PLANTARUM | 2002年 / 116卷 / 03期
关键词：
D O I：
10.1034/j.1399-3054.2002.1160305.x
中图分类号：
Q94 [植物学];
学科分类号：
071001 ;
摘要：
The effects of ozone exposure on lettuce leaves were investigated by means of gas exchange, modulated chlorophyll a fluorescence and antioxidants systems. High ozone concentration decreased the rate of photosynthesis at light saturation level and changes in stomatal conductance and transpiration rate. However, an increase in intercellular CO2 concentration indicated a decrease in the carboxylation efficiency. These data agreed with a reduction of non-cyclic electron flow and lower capacity to reduce the quinone pool. Ozone affected the ascorbate pool and decreased ascorbate peroxidase activity, increased lipid peroxidation, altered membrane properties and reduced the development of non-photochemical quenching.
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收藏
页码：308 / 316
页数：9
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