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This article in JEQ

  1. Vol. 2 No. 3, p. 341-342
    Received: Aug 10, 1972

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Effects of Ozone on Soybean Nodules1

  1. David T. Tingey and
  2. Udo Blum2



Soybeans [Glycine max (L.) Merr.] were exposed to ozone determine if plant growth and nodulation would be reduced The plants were 3 weeks old from seed when exposed to 75 pphm ozone for 1 hour and were harvested at weekly intervals starting 4 days after exposure. The ozone treatment caused only a transitor reduction in top fresh weight. However, nodule number, nodule weight per plant, leghemoglobin content, and root growth were consistently reduced by the ozone treatment. The reductions in nodule weight per plant and leghemoglobin content per plant were directly correlated with the reduction in nodule number.

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