REINERT, R. A. and D. E. WEBER. 1980. Ozone and sulfur dioxide-induced changes in soybean growth. Phytopathology 70:914-916. The growth of soybean was inhibited by exposure to 490 jg 03/r 3 (25 weight at 7 wk and total plant growth at 11 wk. Sulfur dioxide contributed pphm) and 665 jg S02/m 3 (25 pphm), singly and in combination, when to the reduced growth in soybean in the absence of visible SO2 injury. The plants were exposed for 4 hr three times per week for II wk. The main effect of SO2 and 03 in combination on soybean growth was only additive. effects of 03 were a reduction of shoot, root, and plant dry weight measured Treatments containing 03 reduced the numbers and dry weight of root at 5, 7, 9, and 11 wk. The main effects of SO2 were a reduction of shoot dry nodules of soybean, compared with treatments without 03.
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R. A. Reinert (1980) studied this question.