A spatially concerted epidermal auxin signaling framework steers the root hair foraging response under low nitrogen

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dc.contributor.authorJia, Zhongtao
dc.contributor.authorGiehl, Ricardo F.H.
dc.contributor.authorHartmann, Anja
dc.contributor.authorEstevez, Jose M.
dc.contributor.authorBennett, Malcolm J.
dc.contributor.authorvon Wirén, Nicolaus
dc.date.accessioned2023-10-19T15:05:17Z
dc.date.available2023-10-19T15:05:17Z
dc.date.issued2023-09-25
dc.descriptionINDEXACIÓN: SCOPUS.es
dc.description.abstractAs a major determinant of the nutrient-acquiring root surface, root hairs (RHs) provide a low-input strategy to enhance nutrient uptake. Although primary and lateral roots exhibit elongation responses under mild nitrogen (N) deficiency, the foraging response of RHs and underlying regulatory mechanisms remain elusive. Employing transcriptomics and functional studies revealed a framework of molecular components composing a cascade of auxin synthesis, transport, and signaling that triggers RH elongation for N acquisition. Through upregulation of Tryptophan Aminotransferase of Arabidopsis 1 (TAA1) and YUCCA8, low N increases auxin accumulation in the root apex. Auxin is then directed to the RH differentiation zone via the auxin transport machinery, AUXIN TRANSPORTER PROTEIN 1 (AUX1) and PIN-FORMED 2 (PIN2). Upon arrival to the RH zone, auxin activates the transcription factors AUXIN RESPONSE FACTOR 6 and 8 (ARF6/8) to promote the epidermal and auxin-inducible transcriptional module ROOT HAIR DEFECTIVE 6 (RHD6)-LOTUS JAPONICA ROOT HAIRLESS-LIKE 3 (LRL3) to steer RH elongation in response to low N. Our study uncovers a spatially defined regulatory signaling cascade for N foraging by RHs, expanding the mechanistic framework of hormone-regulated nutrient sensing in plant roots. © 2023es
dc.identifier.citationCurrent Biology, Volume 33, Issue 18, Pages 3926 - 3941.e525, September 2023es
dc.identifier.doi10.1016/j.cub.2023.08.040
dc.identifier.issn09609822
dc.identifier.urihttps://repositorio.unab.cl/xmlui/handle/ria/53506
dc.language.isoenes
dc.publisherCell Presses
dc.rights.licenseCC BY 4.0 DEED Atribución 4.0 Internacional
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/deed.es
dc.subjectauxin signalinges
dc.subjectcell fatees
dc.subjectepidermises
dc.subjectlocal N signalinges
dc.subjectnutrient foraginges
dc.subjectroot plasticityes
dc.subjectsystemic N signalinges
dc.subjecttrichoblast developmentes
dc.titleA spatially concerted epidermal auxin signaling framework steers the root hair foraging response under low nitrogenes
dc.typeArtículoes
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