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Coordination of growth in root and shoot apices by AIL/PLT transcription factors

Scheres, Ben and Krizek, Beth A 2018. Coordination of growth in root and shoot apices by AIL/PLT transcription factors. Current Opinion in Plant Biology 41 , p. 95. 10.1016/j.pbi.2017.10.002

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Growth at the root tip and organ generation at the shoot tip depend on the proper functioning of apical meristems and the transitioning of meristematic cell descendants from a proliferating state to cell elongation and differentiation. Members of the AINTEGUMENTA-LIKE/PLETHORA (AIL/PLT) transcription factor family, a clade of two-AP2 domain proteins, specify both stem cell fate and control cellular progression of stem cell daughter cells toward differentiation. Here we highlight the importance of an AIL/PLT protein gradient in controlling distinct cellular behaviors in the root through the regulation of distinct targets in different parts of the root tip. Within the shoot, AIL/PLT proteins also promote organ growth and inhibit differentiation pointing to conserved roles in meristem function. However, they exhibit unequal genetic redundancy in these functions and do not always act in a purely additive manner. Differences in AIL/PLT regulation and perhaps transcriptional targets in roots and shoots suggest that these growth regulators have adapted to mediate growth control in distinct ways in these organ systems.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Biosciences
Publisher: Elsevier
ISSN: 1369-5266
Date of First Compliant Deposit: 10 December 2018
Date of Acceptance: 6 November 2017
Last Modified: 11 Dec 2018 13:30

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