EEB340 Lecture 10.docx

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Department
Ecology & Evolutionary Biology
Course
EEB340H1
Professor
Rowan Sage
Semester
Winter

Description
Lecture 10 Evolution of LeavesEvolution of LeavesMeristem activitytranscription factorsLeaf primordialtranscription factorsMarginal activitytranscription factorsAdaxializationAbaxialization of leavestranscription factorsAuxin and leaf initiation and vascularization Flowering plants o Shoot apical meristem multiple initials o Some will have multiple layers with similar characteristics o Shoot apical meristem is indeterminant o Leaves develop from peripheral zone o Central zone is region of stem cellssource of cells for the rest of the plant o Cells of the peripheral zone have higher division rates than those of the central zone o Central zone cells larger than peripheral cellsHave larger vacuolesperipheral dividing faster so smaller vacuoles o Rib meristem cell division rate intermedi
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