CBNS 108 Lecture Notes - Lecture 18: Inflorescence, Sepal, Gynoecium
27 Feb 2020
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Document Summary
Modes of flower patterning, specification and determination in arabidopsis. Meristem: is the tissue in most plants that contain undifferentiated cells, found in zones of the plant where growth can take place. Inflorescence mutation unable to transition from inflorescence meristems to floral meristems: also include inhibitory genes, that control meristem fate in both time and physical location, master regulatory genes that control the entire floral initiation process (flip). Fail to develop floral meristems; encodes a transcription factor that activates a series of floral meristem identity genes. Environmental signaling triggers the activation of lfy: type ii: symmetry mutants. Genes that control the radial symmetry of the developing floral meristems. Type ii mutations disrupt the actinomorphy (radial symmetry) in arabidopsis flowers. Symmetry mutants will often alter the radial patterning, but the organ identities within the whorls will remain unaffected. Altered cell identity and organ identity! (type iii) identity mutants: floral homeotic genes that define primordium/whorl identity.
