Root hairs have long been considered to elongate exclusively by so-called tip growth, in which the new building material is deposited at the root hair apex. Using a set of newly developed imaging experiments, we revealed that root hair shank expansion can substantially contribute to total root hair growth.
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References
Schoenaers, S., et al. in Pollen Tip Growth (eds Obermeyer, G. & Feijó, J.) 167–243 (Springer International Publishing, 2017). A chapter that summarizes knowledge on root hair formation from bulging to polar expansion.
Mravec, J. et al. An oligogalacturonide-derived molecular probe demonstrates the dynamics of calcium-mediated pectin complexation in cell walls of tip-growing structures. Plant J. 91, 534–546 (2017). This paper reports the different distribution patterns of homogalacturonan in the cell walls of root hairs and pollen tubes.
Anderson, C. T. Metabolic click-labelling with a fucose analog reveals pectin delivery, architecture and dynamics in Arabidopsis cell walls. Proc. Natl. Acad. Sci. USA 109, 1329–1334 (2012). This study served as the major inspiration to track cell wall formation via click chemistry in the current study.
Franková, L. & Fry, S. C. Biochemistry and physiological roles of enzymes that ‘cut and paste’ plant cell-wall polysaccharides. J. Exp. Bot. 64, 3519–3550 (2013). This review summarises the roles of transglucanases in cell wall formation and growth.
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This is a summary of: Herburger, K. et al. Shank-localized cell wall growth contributes to Arabidopsis root hair elongation. Nat. Plants https://doi.org/10.1038/s41477-022-01259-y (2022).
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Arabidopsis root hairs do not only grow at their tip. Nat. Plants 8, 1214–1215 (2022). https://doi.org/10.1038/s41477-022-01264-1
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DOI: https://doi.org/10.1038/s41477-022-01264-1
