MCD BIO C141 Lecture Notes - Lecture 12: Meristem, Eudicots, Epistasis

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Recognize how stomata development is a model for stem cells. Summarize the function and timing of stomata regulators. Also called accessory cell. pavement cell: a cell type found in the outmost epidermal layer of plants. The result of such a process differentiation: the process by which cells or parts of an organism change during development to serve a specific function. Speechless (spch): transcription factor acting as an integration node for stomata and brassinosteroid (br) signaling pathways to control stomatal initiation and development. Activates transcription when in the presence of scrm/ice1. Functions as a dimer with scrm or scrm2 during stomatal initiation. Required for the initiation, the spacing and the formation of stomata, by promoting the first asymmetric cell divisions. Together with fma and mute, modulates the stomata formation. Involved in the regulation of growth reduction under osmotic stress (e. g. mannitol), associated with a quick decrease of meristemoid mother cells (mmcs) number lower stomatal index and density.

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