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Regulation of the arabidopsis floral homeotic gene APETALA1
Ist Teil von
Cell, 1994-01, Vol.76 (1), p.131-143
Ort / Verlag
Cambridge, MA: Elsevier Inc
Erscheinungsjahr
1994
Link zum Volltext
Quelle
Elsevier Journal Backfiles on ScienceDirect (DFG Nationallizenzen)
Beschreibungen/Notizen
The Arabidopsis floral homeotic gene
APETALA1 (
AP1) encodes a putative transcription factor that acts locally to specify the identity of the floral meristem and to determine sepal and petal development. RNA tissue in situ hybridization studies show that
AP1 RNA accumulates uniformly throughout young floral primordia, but is absent from the inflorescence meristem. Later in development,
AP1 RNA is excluded from cells that will give rise to the two inner whorls of organs. Here we show that
AP1 expression is under the control of two negative regulators: the meristem identity gene
TERMINAL FLOWER represses
AP1 RNA accumulation in the inflorescence meristem, and the organ identity gene
AGAMOUS prevents
AP1 RNA accumulation in the two inner whorls of wild-type flowers. These and other data presented here lead to a revised model for the regulatory interactions among the genes specifying floral organ identity in Arabidopsis.