Atmospheric Aldehydes Related to Petunia Leaf Damage

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Science  21 Feb 1964:
Vol. 143, Issue 3608, pp. 818-820
DOI: 10.1126/science.143.3608.818


Snowstorm petunias grown in the greenhouse developed a necrotic banding of the actively expanding foliage characteristic of injury ascribed to various photochemically produced pollutants in the atmosphere. In this case the damage appeared to be related to the high aldehyde content of the ambient air. Each time the aldehyde concentration exceeded 0.20 parts per million for 2 hours, injury appeared within a day or two. From July to September 1963 such plant injury was observed on seven occasions.