The herbicide EPTC (S-ethyl dipropylthiocarbamate) stimulated peroxidase activity in corn seedlings and enhanced lignin deposition during the first few days after treatment. A time study showed that the increase in peroxidase was concomitant with the inhibition in growth. The effects of EPTC on growth and peroxidase activity were annulled by the herbicide antidote (N,N-diallyl-2,2dichloroacetamide) but not by indoleacetic acid or gibberellic acid. The mechanism of action of EPTC and the antidote are discussed.
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Harvey et al. (1975) studied this question.
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