Enzymatic studies on ninhydrin-positive compounds exuded by root tips of pea seedlings |
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Authors: | A. W. S. M. van Egeraat |
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Affiliation: | (1) Laboratory of Microbiology, Agricultural University, Wageningen, The Netherlands |
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Abstract: | Summary The action of L-amino-acid oxydase, D-amino-acid oxydase and L-glutamic decarboxylase on ninhydrin-positive compounds present in root-tip exudates and root-scraping extracts of pea seedlings, is described. Results of Fukuda et al. are confirmed as to the presence of D-alanine in -glutamyl-alanine.The possible inhibitory effects of -L-glutamyl-D-alanine and of Unknown Y (most probably 2-alanyl-isoxazolin-5-one) on bacterial growth are discussed. re]19760809 |
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