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Laser capture microdissection (LCM) of shoot apical meristem (SAMs) from 14-day-old maize seedlings. A SAM before (a) and after (b) LCM. Leaf primordia are numbered according to their relative developmental ages, wherein P0 (0) corresponds to the incipient leaf forming at the flank of the SAM. Bar: 100 μm.
