XYLEM INTERMIXED WITH PHLOEM1, a leucine-rich repeat receptor-like kinase required for stem growth and vascular development in Arabidopsis thaliana

Anthony C. Bryan, Adam Obaidi, Michael Wierzba, Frans Tax

Research output: Contribution to journalArticle

33 Citations (Scopus)

Abstract

The regulation of cell specification in plants is particularly important in vascular development. The vascular system is comprised two differentiated tissue types, the xylem and phloem, which form conductive elements for the transport of water, nutrients and signaling molecules. A meristematic layer, the procambium, is located between these two differentiated cell types and divides to initiate vascular growth. We report the identification of a receptor-like kinase (RLK) that is expressed in the vasculature. Histochemical analyses of mutants in this kinase display an aberrant accumulation of highly lignified cells, typical of xylem or fiber cells, within the phloem. In addition, phloem cells are sometimes located adjacent to xylem cells in these mutants. We, therefore, named this RLK XYLEM INTERMIXED WITH PHLOEM 1 (XIP1). Analyses of longitudinal profiles of xip1 mutant stems show malformed cell files, indicating defects in oriented cell divisions or cell morphology. We propose that XIP1 prevents ectopic lignification in phloem cells and is necessary to maintain the organization of cell files or cell morphology in conductive elements.

Original languageEnglish (US)
Pages (from-to)111-122
Number of pages12
JournalPlanta
Volume235
Issue number1
DOIs
StatePublished - Jan 2012

Fingerprint

Xylem
stem elongation
Growth and Development
Arabidopsis
blood vessels
Leucine
leucine
xylem
Blood Vessels
phosphotransferases (kinases)
Phosphotransferases
Arabidopsis thaliana
Phloem
receptors
phloem
cells
mutants
fiber cells
plant vascular system
lignification

Keywords

  • LRR RLKs
  • Phloem
  • Procambium
  • Vasculature
  • Xylem

ASJC Scopus subject areas

  • Plant Science
  • Genetics

Cite this

XYLEM INTERMIXED WITH PHLOEM1, a leucine-rich repeat receptor-like kinase required for stem growth and vascular development in Arabidopsis thaliana. / Bryan, Anthony C.; Obaidi, Adam; Wierzba, Michael; Tax, Frans.

In: Planta, Vol. 235, No. 1, 01.2012, p. 111-122.

Research output: Contribution to journalArticle

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