The no apical meristem gene of Petunia is required for pattern formation in embryos and flowers and is expressed at meristem and primordia boundaries

E. Souer, A. van Houwelingen, D. Kloos, J. Mol, R. Kroes

    Research output: Contribution to journalArticleAcademicpeer-review

    622 Citations (Scopus)

    Abstract

    Petunia embryos carrying the no apical meristem (nam) mutation fail to develop a shoot apical meristem. Occasional shoots on nam- seedlings bear flowers that develop ten instead of five primordia in the second whorl. Double mutants with the homeotic gene green petals show that ham acts independently of organ identity in whorl 2 and now also affects primordium number in whorl 3. The ham gene was isolated by transposon tagging. The encoded protein shares a conserved N-terminal domain with several other proteins of unknown function and thus represents a novel class of proteins. Strikingly, nam mRNA accumulates in cells at the boundaries of meristems and primordia. These data indicate a role for nam in determining positions of meristems and primordia.
    Original languageEnglish
    Pages (from-to)159-170
    JournalCell
    Volume85
    Issue number2
    DOIs
    Publication statusPublished - 1997

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