Plants have the impressive ability to growth during their entire lifespan thanks to the activity of meristematic tissues. Cell divisions occurring at the apical meristems generate new meristematic cells and cells that will enter into a differentiation program to eventually form new organs. In flowering plants, during their vegetative phase, the Shoot Apical Meristem (SAM), located above the youngest leaf primordium, is committed to generate new leaves. Next, internal and environmental signals converge into a molecular input that transforms the vegetative meristem into a reproductive meristem. Depending on the species, single flowers or inflorescences differentiate from the reproductive meristem.
Why is ExpoSEED so interested in studying the formation of such meristems? Because if we understand how the number of inflorescence/floral meristems is established and how floral organs differentiate we have key targets to eventually shape plant architecture and improve the yield. To reach this goal we need to work on deciphering molecular networks where environmental and internal signals are integrated to modulate plant growth.
B5- Plant Growth & Meristems
Elliot Meyerowitz (Caltech, HHMI) 2: Plant development: Modeling Arabidopsis phyllotaxis
Dominique Bergmann (Stanford U / HHMI) 1: Key issues in plant development