Ozone Injury to Pinus Strobus

Costonis, A. C.; Sinclair, W. A.

doi:10.1080/00022470.1969.10469351

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1972

2023

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Cited by 15 publications

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“…and about 15 (actually 13 to 18) pphm ozone as monitored with a Mast ozone meter. The concentration of 5 pphm approximates values which have been observed commonly in rural, relatively unpopulated areas such as the southern Appalachians (Berry and Ripperton 1963) and in central New York (Costonis and Sinclair 1969). I n contrast, ozone concentrations as high as 15 pphm are commonly encountered only in or near urban centers, such as in the San Bernardino Mountains on the edge of the Los Angeles basin (Miller et 01.…”

Section: Methodsmentioning

confidence: 89%

Effects of chronic exposure to ozone on soluble sugar and ascorbic acid contents of pine seedlings

Barnes¹

1972

Can. J. Bot.

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Small seedlings of five pine species (Pinus strobus, echinata, elliottii, serotina, and taeda) were exposed to low levels of ozone for periods from 5 to 22 weeks. Exposure to 5 parts per hundred million ozone resulted in significant increases in total soluble carbohydrates, reducing sugars, and ascorbic acid. In seedlings exposed to 15 pphm ozone, soluble sugars were higher than in the controls but ascorbic acid levels were not.

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Section: Methodsmentioning

confidence: 89%