Abstract

Penicillin caused elongation inhibition of mungbean (Phaseolus aureus L.) seedlings at concentrations above 100 mgl-1. Inhibition of hypocotyl could be reduced to different degrees by manganese, pyruvate, succinate, fumarate, malate, GA3, purines, pyrimidines and nucleosides, whereas the amino acids except cysteine were not effective. Penicillin inhibited neither elongation of wheat coleoptile sections nor the cell enlargement induced by IAA in this tissue. Thus penioillin inhibits intact seedling elongation probably through an Effect on cell division apparently without inhibiting cell enlargement.

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