Determination of Arabidopsis floral meristem identity by AGAMOUS.
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Implication
Functional genetic study demonstrates that AGAMOUS drives the indeterminate-to-determinate meristem transition in Arabidopsis, indicating its role as a master floral switch.
Key Points
- To determine the role of AGAMOUS in controlling floral meristem identity and determinacy relative to the upstream regulators LEAFY and APETALA1 in Arabidopsis.
- Analyzed loss-of-function ag mutant phenotypes in Arabidopsis following the removal of long-day photoperiodic flowering stimuli.
- Engineered gain-of-function transgenic Arabidopsis plants expressing AG under the control of the cauliflower mosaic virus 35S promoter in both wild-type and lfy ap1 double-mutant backgrounds.
- Loss of AG function resulted in the indeterminate central region of floral meristems reverting to inflorescence meristems upon removal of the long-day flowering stimulus.
- Ectopic 35S-driven AG expression induced precocious flowering and terminal flower formation at the apices of primary and axillary shoots, even in lfy ap1 double mutants.
Cite This Study
Mizukami et al. (1997) studied this question.