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A molecular rheostat adjusts auxin flux to promote root protophloem differentiation

Marhava, P. ; Bassukas, A. E. L. ; Zourelidou, M. ; Kolb, M. ; Moret, B. ; Fastner, A. ; Schulze, W. X. ; Cattaneo, P. ; Hammes, U. Z. ; Schwechheimer, C. ; Hardtke, C. S.



Abstract

Auxin influences plant development through several distinct concentration-dependent effects(1). In the Arabidopsis root tip, polar auxin transport by PIN-FORMED (PIN) proteins creates a local auxin accumulation that is required for the maintenance of the stem-cell niche(2-4). Proximally, stem-cell daughter cells divide repeatedly before they eventually differentiate. This developmental gradient ...

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