Characterization of Waldmeister, a novel developmental mutant in Arabidopsis thaliana

Gisela Felix, Thomas Altmann, Ursula Uwer, Alison Jessop, Lothar Willmitzer, Peter Christian Morris

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    11 Citations (Scopus)


    A novel Arabidopsis thaliana (L.) Heynh. developmental mutant, Waldmeister (warn), is described. This mutant was found in the progeny arising from an Ac-Ds tagging experiment, but does not appear to be tagged by an introduced transposon. This recessive nuclear mutation maps between CAPB and ap1 on chromosome 1 and shows extreme morphological and physiological changes in both floral and vegetative tissues. Changes to the vegetative phenotype include altered leaf morphology, multiple rosettes, stem fasciation, retarded senescence and disturbed geotropic growth. Changes to the floral phenotype include delayed flowering, increased number of inflorescences, determinate inflorescences, altered number and morphology of floral organs, chimeric floral organs, and ectopic ovules, warn was crossed to a number of previously described floral mutants: apetela 2, apetela 3, pistillata, agamous, and leafy. The phenotype of the double mutant was in each case additive. In the case of agamous, however, the indeterminate repetitive floral structure of agamous was lacking, emphasizing the determinate inflorescence growth of warn. The extreme phenotype of the warn mutant is suggestive of a disturbance to a gene of global importance in the regulation of plant growth and development.

    Original languageEnglish
    Pages (from-to)1007-1017
    Number of pages11
    JournalJournal of Experimental Botany
    Issue number301
    Publication statusPublished - 1996


    • Arabidopsis thaliana
    • Developmental mutant
    • Flower mutant
    • Waldmeister


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