The Mechanism Forming the Cell Surface of Tip-Growing Rooting Cells Is Conserved among Land Plants

Suvi Honkanen, Victor A S Jones, Giulia Morieri, Clement Champion, Alexander J. Hetherington, Steve Kelly, Hélène Proust, Denis Saint-Marcoux, Helen Prescott, Liam Dolan

Research output: Contribution to journalArticle

38 Citations (Scopus)

Abstract

To discover mechanisms that controlled the growth of the rooting system in the earliest land plants, we identified genes that control the development of rhizoids in the liverwort Marchantia polymorpha. 336,000 T-DNA transformed lines were screened for mutants with defects in rhizoid growth, and a de novo genome assembly was generated to identify the mutant genes. We report the identification of 33 genes required for rhizoid growth, of which 6 had not previously been functionally characterized in green plants. We demonstrate that members of the same orthogroup are active in cell wall synthesis, cell wall integrity sensing, and vesicle trafficking during M. polymorpha rhizoid and Arabidopsis thaliana root hair growth. This indicates that the mechanism for constructing the cell surface of tip-growing rooting cells is conserved among land plants and was active in the earliest land plants that existed sometime more than 470 million years ago [1, 2].

Original languageEnglish
Pages (from-to)3238-3244
Number of pages7
JournalCurrent Biology
Volume26
Issue number23
DOIs
Publication statusPublished - 5 Dec 2016
Externally publishedYes

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