Growth regulation in tip-growing cells that develop on the epidermis. (December 2016)

• Record Type: Journal Article
• Authors: Honkanen, Suvi; Dolan, Liam
• Is Part Of: Current opinion in plant biology. Volume 34(2016)
• Page Start: 77
• Page End: 83
• Publication Date: 2016-12
• Subjects: Plant molecular biology -- Periodicals; 571.205
• DOI: 10.1016/j.pbi.2016.10.006
• Languages: English
• ISSNs: 1369-5266

Abstract

Abstract : Graphical abstract: Highlights: Class I RSL genes are conserved regulators of root hair and rhizoid development. Class I RSL genes control the early stages of epidermal cell outgrowth. Positioning of root hair outgrowth involves formation of a localised membrane domain. Polyploidisation changed class II RSL gene expression during wheat evolution. Abstract : Plants develop tip-growing extensions — root hairs and rhizoids — that initiate as swellings on the outer surface of individual epidermal cells. A conserved genetic mechanism controls the earliest stages in the initiation of these swellings. The same mechanism controls the formation of multicellular structures that develop from swellings on epidermal cells in early diverging land plants. Details of the molecular events that regulate the positioning of the swellings involve sterols and phosphatidylinositol phosphates. The final length of root hairs is determined by the intensity of a pulse of transcription factor synthesis. Genes encoding similar transcription factors control root hair development in cereals and are potential targets for crop improvement.