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Tobacco

Nicotiana tabacum L.

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Symptoms observed in the field

cv. Bel W3

Tobacco Bel W3 have been widely used as ozone bioindicator (see Eurobionet project). Symptoms, caused by natural levels of ozone are well defined necrosis, irregular and covering the interveinal areas (A). Senescent leaves show ozone lesions joined together making irregular shapes, with ivory (B), or brownish colour (C).

© 2009 Fundación CEAM © 2009 Copyright of the photos: their authors