...Jim P. Fouracre; Victoria J. Chen; R. Scott Poethig ABSTRACT In Arabidopsis , loss of the carboxypeptidase ALTERED MERISTEM PROGRAM1 (AMP1) produces an increase in the rate of leaf initiation, an enlarged shoot apical meristem and an increase in the number of juvenile leaves. This phenotype is also...

.... Published by The Company of Biologists Ltd AMP1 Lotus japonicus Nodulation Shoot apical meristem The formation of root nodules (nodulation) is a form of de novo organogenesis that is particularly characteristic of leguminous plants. Nodule development involves the collaborative...

... and postembryonic development. Here we show that MP patterning activity is largely dispensable when the presumptive carboxypeptidase ALTERED MERISTEM PROGRAM 1 ( AMP1 ) is not functional, indicating that MP is primarily necessary to counteract AMP1 activity. Closer inspection of the single and double mutant...