Floral Organ Development Flashcards
1
Q
ABC Model for Organ Identity
A
Whorls have different organs due to distinct combinations of factors. Whorl 1 = A = Sepal Whorl 2 = A + B = Petal Whorl 3 = B + C = Stamen Whorl 4 = C = Carpel
Note that is is an incomplete model. (MADS box transcription factors + SEPALLATA genes)
2
Q
MADS Box Transcription Factors
A
AP1, AP2, AP3, PI, AG
Work best when they stick together
A = AP1/AP2 B = AP3/PI C = AG
3
Q
Molecular Basis of the ABC model
A
MADS box proteins interact in ternary and quaternary complexes.
SEPALLATA genes encode MADS box transcription factors.
