University of California, Davis

PLB 112

Plant Biology 112 Winter 2023 What day and time is best for a review session for the Final Exam? A. Fri 03/17 @ 5:00 pm B. Sat 03/18 @ 5:00 pm C. Sun 03/19 @ 11:00 am D. Tue 03/21 @ 11:00 am E. I don’t want a review session Clicker Question PLB 112 Office Hours • John Harada – Thursday Mar 16 11:00 am – noon • https://ucdavis.zoom.us/j/91573533243?pwd=VDBQajJ2WVRFcVQwUlAveFZ4WlVrQT09 – Friday Mar 17 3:30 – 4:30 pm • https://ucdavis.zoom.us/j/96471103067?pwd=K1Y5NUtSNit0SzB1MDZHbXZWTWQ5Zz09 – Mon Mar 20 noon – 1:00 pm • https://ucdavis.zoom.us/j/92118696796?pwd=aDFHTGZaNVpsU0RUWVBId1ZOVzUvUT09 • Calvin Huang – Friday Mar 17 4:30 – 6:30 pm • Zoom link on Canvas • Tamera Taylor – Monday Mar 20 9:30 – 10:30 am • Zoom link on Canvas Learning Objectives for Lecture 17 – 03/13/23 • Discuss vegetative, inflorescence, and floral meristems and their functions • Recognize arrangement of floral organs in flower • Evaluate the ABC model of floral organ identity • Determine phenotypes of mutants in floral homeotic genes • Summarize expression domains of floral regulators • Interpret micro RNA action in controlling gene expression • Explain how AP2 expression is regulated in flowers Plant Biology 112 Winter 2023 Review of Last Lecture Two Pathways are Required to Establish Root Apical Meristem Organization by Specifying Quiescent Center Cell Specification 1. Auxin – PLETHORA Pathway a. Polar auxin transport establishes an auxin maximum in the region surrounding the Quiescent Center b. PLT is induced by auxin in the QC c. PLT is required to specify QC identity PIN Auxin Efflux Carriers Mediate Auxin Maximum Formation and PLETHORA Expression in the Root Ap