MCD BIO C141 Lecture Notes - Lecture 15: Histone Deacetylase, Meristem, Petal
1 Jun 2020
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Recall which floral homeotic genes are responsible for specific fates. Define the abc model of floral organ development. Explain the quartet model of floral organ development. It may occur singly or as one of a group. homeotic transformation: a transformation of organs in which the developmental fate of an organ is changed to that of another. Apetala2 (ap2): probable transcriptional activator that promotes early floral meristem identity. Is required subsequently for the transition of an inflorescence meristem into a floral meristem. Plays a central role in the specification of floral identity, particularly for the normal development of sepals and petals in the wild-type flower, by spatially controlling the expression domains of multiple floral organ identity genes. Acts as a class cadastral protein by repressing the c class floral homeotic gene agamous in association with other repressors like leunig and seuss. Directly represses agamous by recruiting the transcriptional corepressor topless and the histone deacetylase hda19.
