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- W6081826 abstract "Polyamine content and biosynthesis were determined in conjunction with meristematic activity and growth of Zea mays roots. Three types of developmental events were investigated: growth of intact primary roots, formation of lateral root primordia following main root decapitation, and activity of the quiescent center following root cap excision. A low ratio of putrescine/spermidine cotents was found to be salient feature of regions with high meristematic activity, in all 3 experimental systems. Arginine decarboxylase (ADC) and ornithine decarboxylase (ODC) activities increased concomitantly with lateral root primordia development and activation of the quiescent center. An increase in the incorporation of arginine and ornithine into spermidine was found in meristematic zones. L-canavanine inhibited primary root elongation and formation of lateral primordia as well as ADC and ODC activity. Similar inhibitory effects were found with MGBG and CHA, both inhibitors of polyamine biosynthesis. A parallel study of ODC localization and DNA synthesis (using {alpha}-{sup 14}C-DFMO and {sup 3}H-thymidine microautoradiography, respectively) revealed than root zones with high meristematic activity are characterized by high ODC activity." @default.
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- W6081826 date "1989-04-01" @default.
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- W6081826 title "Polyamines and meristematic activity in Zea mays roots" @default.
- W6081826 hasPublicationYear "1989" @default.
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