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Reduced meristem size in 35S::AtRALFL8 roots. Cortical meristematic cells between the quiescent center (white arrows) and the transition zone (yellow arrow) were counted in wild-type (A) and 35S::AtRALFL8 (B) plants 10 d post germination. Red indicates cell walls as stained by propidium iodide. C, The meristem was significantly shorter in the 35S::AtRALFL8 plants (n = 5; **P < 0.01).
