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Taraxacum officinale

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Common name: Dandelion

Symptoms induced in controlled conditions (fumigation with ozone)

Fumigation of Taraxacum officinale with enhanced ozone levels in Open Top Chambers (OTCs) produced interveinal stippling with associated purple-red areas (upper photo). Although the purple-red colorations were enhanced by ozone, they are also frequent in species under natural conditions, even at very low concentrations as in this the case of the lower picture showing a plant grown in filtered (ozone-free) air. Therefore, only the presence of stipples can be considered as a reliable symptom of an ozone impact in the field.

Symptoms that can be mistaken for those induced by ozone

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