A mutation in the Arabidopsis TFL1 gene affects inflorescence meristem development

We present the initial phenotypic characterization of an Arabidopsis mutation, terminal flower 1-1 (tfl1-1), that identifies a new genetic locus, TFL1. The tfl1-1 mutation causes early flowering and limits the development of the normally indeterminate inflorescence by promoting the formation of a te...

Full description

Saved in:
Bibliographic Details
Published in:The Plant cell 1991-09, Vol.3 (9), p.877-892
Main Authors: Shannon, S. (University of Oregon, Eugene, OR), Meeks-Wagner, D.R
Format: Article
Language:English
Subjects:
ANATOMIA DE LA PLANTA
ANATOMIE VEGETALE
Apical meristems
CRUCIFERAE
Developmental biology
FENOTIPOS
FLEUR
FLORACION
FLORAISON
FLORES
Flowering
Flowers
GENE
GENES
Genetic mutation
HABITOS DE CRECIMIENTO
INFLORESCENCE
Inflorescences
INFLORESCENCIAS
LOCALISATION DE GENE
LOCALIZACION DE GENES
LOCI
LOCUS
MERISTEMAS APICALES
MERISTEME APICAL
Meristems
MUTACION INDUCIDA
MUTANT
MUTANTES
MUTATION PROVOQUEE
PHENOTYPE
Phenotypes
Photoperiod
Plants
POLIMORFISMO
POLYMORPHISME
PORT DE LA PLANTE
SEGREGACION
SEGREGATION
TALLO
TIGE
Citations: Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We present the initial phenotypic characterization of an Arabidopsis mutation, terminal flower 1-1 (tfl1-1), that identifies a new genetic locus, TFL1. The tfl1-1 mutation causes early flowering and limits the development of the normally indeterminate inflorescence by promoting the formation of a terminal floral meristem. Inflorescence development in mutant plants often terminates with a compound floral structure consisting of the terminal flower and one or two subtending lateral flowers. The distal-most flowers frequently contain chimeric floral organs. Light microscopic examination shows no structural aberrations in the vegetative meristem or in the inflorescence meristem before the formation of floral buttresses. The wild-type appearance of lateral flowers and observations of double mutant combinations of tfl1-1 with the floral morphogenesis mutations apetala 1-1 (ap1-1), ap2-1, and agamous (ag) suggest that the tfl1-1 mutation does not affect normal floral meristems. Secondary flower formation usually associated with the ap1-1 mutation is suppressed in the terminal flower, but not in the lateral flowers, of tfl1-1 ap1-1 double mutants. Our results suggest that tfl1-1 perturbs the establishment and maintenance of the inflorescence meristem. The mutation lies on the top arm of chromosome 5 approximately 2.8 centimorgans from the restriction fragment length polymorphism marker 217
ISSN:1040-4651
1532-298X
DOI:10.1105/tpc.3.9.877