APL regulates vascular tissue identity in Arabidopsis

@article{Bonke2003APLRV,
  title={APL regulates vascular tissue identity in Arabidopsis},
  author={Martin Bonke and Siripong Thitamadee and Ari Pekka M{\"a}h{\"o}nen and Marie-Theres Hauser and Yk{\"a} Helariutta},
  journal={Nature},
  year={2003},
  volume={426},
  pages={181-186}
}
Vascular plants have a long-distance transport system consisting of two tissue types with elongated cell files, phloem and xylem. Phloem has two basic cell types, enucleate sieve elements and companion cells. Xylem has various lignified cell types, such as tracheary elements, the differentiation of which involves deposition of elaborate cell wall thickenings and programmed cell death. Until now, little has been known about the genetic control of phloem–xylem patterning. Here we identify the… 
Vascular formation in Arabidopsis
TLDR
The vascular mutant namely, Altered Phloem Development (APL), which is required for acquisition of phloem identity is identified and provides a strong link to the as yet unidentified pre-patterning machinery and will be an excellent tool to uncover truephloem determinants and its downstream targets in plants.
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Advanced live-imaging techniques which enable prolonged time-lapse captures of root tip growth as well as single-cell transcriptomic analysis of the 20–25 cells in the SE file could shed light on the rapidity of SE differentiation and its importance to the meristem.
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TLDR
The presented results suggest that APL has a dual role both in promoting phloem differentiation and in repressing xylem differentiation during vascular development, and a model of vascular development is proposed in which both WOL and APL are critical steps for vascular patterning.
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TLDR
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TLDR
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Ectopic Vascular Induction in Arabidopsis Cotyledons for Sequential Analysis of Phloem Differentiation.
TLDR
The methods of microscopic, genetic, and molecular analysis using VISUAL, which can help in decrypting the transcriptional networks that regulate vascular cell differentiation, are reported.
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TLDR
A dynamic model factoring in the interactions between molecules that have been reported to be central in this process is put forward, rendering a dynamic account of how the collective action of hormones, genes, and other molecules may result in the specification of the three main cell types within shoot vascular bundles.
Molecular genetic framework for protophloem formation
TLDR
Application of the peptide ligand CLAVATA3/EMBRYO SURROUNDing REGION 45 (CLE45) specifically inhibits specification of protophloem in Arabidopsis roots by locking the sieve element precursor cell in its preceding developmental state.
Initiation and regulation of vascular tissue identity in the Arabidopsis embryo
TLDR
This work uncovers components of a gene regulatory network that controls the initiation of vascular tissue identity, one of which involves the interaction of MP and GBF2 proteins.
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