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Published in Crop Sci 12:268-270 (1972)
© 1972 Crop Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Soybean Cultivars: Acute Foliar Response to Ozone1

David T. Tingey2, Richard A. Reinert3 and Hershell B. Carter2

Fourteen cultivars of soybean [Glycine max (L.) Merr.] from maturity groups 0 through VI were exposed to 30 and 70 pphm ozone for 1.5 hours to determine differences in cultivar sensitivity. Cultivar ‘Hark’ was the most susceptible, whereas ‘Hood’ was the most tolerant to ozone injury. ‘Hawkeye’ was the most sensitive cultivar at 70 pphm and among the least sensitive at 30 pphm, whereas ‘Chippewa 64’ was relatively tolerant at 70 pphm but among the most sensitive at 30 pphm. Ozone symptoms ranged from chlorotic and/or necrotic fleck and pigmented lesions to upper surface bleaching and bifacial necrosis of the leaves.

Key Words: Air pollution • Ozone symptoms

1 Cooperative investigations of the Environmental Protection Agency and the U.S. Department of Agriculture, North Carolina State University, Raleigh, North Carolina 27607.

2 Botanist and Horticulturist, respectively, Division of Ecological Research, Environmental Protection Agency.

3 Plant Pathologist, Plant Science Research Division, Agricultural Research Service, U. S. Department of Agriculture.

Received for publication October 28, 1971.




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