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. 2013 May 6;2(2):317–342. doi: 10.3390/plants2020317

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© 2013 by the authors; licensee MDPI, Basel, Switzerland.

This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/3.0/).

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Functional categories of TALE target genes. Putative TALE direct targets belong to three main functional categories: hormonal pathways (grey box), transcriptional regulation (pink box) and cell wall metabolism (light blue box). KNOX1 positively regulate cytokinin biosynthesis and signaling through induction of ISOPENTENYL TRANSFERASE (IPTs) and ARABIDOPSIS RESPONSE REGULATORS (ARRs) genes. Low active gibberellins levels are maintained by KNOX1 through repression of GA biosynthetic genes (GA20ox) and induction of GA degradation by GA2ox genes. CUC1 TF has been identified as a direct target of STM in Arabidopsis. Arabidopsis KNAT1/BP was shown to repress several genes involved in lignin biosinthesis. Arabidopsis BLH9/BLR negatively regulate PECTIN METHYLESTERASE 5 (PME5) gene to repress cell expansion in the SAM. Recent studies of ChIP-seq and RNA-seq identified KN1 modulated and bound genes enriched in TFs and hormone metabolism, most notably auxin.