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Leaf development in plants by Akash Naara
This document summarizes research on leaf development and phyllotaxy (leaf arrangement) in plants. It discusses how KNOX proteins accumulate in the shoot apical meristem (SAM) but are excluded from leaves. Application of the plant hormone NPA arrests leaf initiation, showing KNOX proteins regulate this process. It also describes how the microRNA miR166 controls expression of the PHB gene involved in abaxial-adaxial patterning in leaves. Different leaf arrangements like alternate, opposite, whorled and spiral are defined. Experiments demonstrate the SAM maintains itself and periodically forms incipient leaf primordia in specific positions influenced by existing leaves. Evidence suggests the plant hormone auxin is a key signal regulating
