PLANT OZONE INJURY SYMPTOMS
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概要
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A study of the phytotoxicity of ozone to plants was conducted in controlled-atomosphere greenhouses to detemine if the symptoms of such exposure would be similiar to symptoms exhibited by plants exposed to photochemical smog (which contains ozone) in the Tokyo area. Test plants used were herbaceous plants and woody plants, which were fumigated to 20 pphm ozone. Plants used as controlls for the ozone exposure experiments were placed in a carbon filtered geenhouse. Herbaceous plants were generally sensitive to injury, especially Brassica rapa, Brassica pekinensis and others were extremely responsive species. In comparison with herbaceous plants, woody plants were rather resistant except for poplar. Depending on plant species and severity of injury, ozone-injury symptoms of herbaceous plants were bleaching, chlorosis, necrosis, and reddish-brown flecks. leaves of woody plants developed discrete, punctate spots, reddish-brown pigment on the upper surfaces and lastly defoliation. Ozone injury was typically confined to the upper leaf surfaces and notably greater mature leaves. Microscopic examination showed that pallisade cells were much more prone to ozone injury than other tissues.
- 社団法人 大気環境学会の論文
社団法人 大気環境学会 | 論文
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