The co-chaperone p23 controls root development through the modulation of auxin distribution in the<i>Arabidopsis</i>root meristem

D’Alessandro, Stefano; Golin, Serena; Hardtke, Christian S.; Schiavo, Fiorella Lo; Zottini, Michela

doi:10.1093/jxb/erv330

Cited by 29 publications

(20 citation statements)

References 38 publications

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“…It is well known that the activity of the RAM determines root growth (Grunewald et al, 2012 ; Perilli et al, 2012 ; Petricka et al, 2012 ; D'alessandro et al, 2015 ). To investigate whether the growth inhibition of soybean roots by salt is due to a reduction in root meristem activity, we measured the length of the meristem zone in longitudinally cut root tips from seedlings grown in 0 or 75 mM NaCl.…”

Section: Resultsmentioning

confidence: 99%

Genome-Wide Small RNA Analysis of Soybean Reveals Auxin-Responsive microRNAs that are Differentially Expressed in Response to Salt Stress in Root Apex

et al. 2016

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Root growth and the architecture of the root system in Arabidopsis are largely determined by root meristematic activity. Legume roots show strong developmental plasticity in response to both abiotic and biotic stimuli, including symbiotic rhizobia. However, a global analysis of gene regulation in the root meristem of soybean plants is lacking. In this study, we performed a global analysis of the small RNA transcriptome of root tips from soybean seedlings grown under normal and salt stress conditions. In total, 71 miRNA candidates, including known and novel variants of 59 miRNA families, were identified. We found 66 salt-responsive miRNAs in the soybean root meristem; among them, 22 are novel miRNAs. Interestingly, we found auxin-responsive cis-elements in the promoters of many salt-responsive miRNAs, implying that these miRNAs may be regulated by auxin and auxin signaling plays a key role in regulating the plasticity of the miRNAome and root development in soybean. A functional analysis of miR399, a salt-responsive miRNA in the root meristem, indicates the crucial role of this miRNA in modulating soybean root developmental plasticity. Our data provide novel insight into the miRNAome-mediated regulatory mechanism in soybean root growth under salt stress.

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Section: Resultsmentioning

confidence: 99%

Genome-Wide Small RNA Analysis of Soybean Reveals Auxin-Responsive microRNAs that are Differentially Expressed in Response to Salt Stress in Root Apex

et al. 2016

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“…HOP isoforms are represented by three genes . p23 proteins are encoded by two genes in Arabidopsis , while AT3G12050 represents the Arabidopsis homolog to Activator of HSP90 ATPase (Aha1). Aha1 is a HSP90 co‐chaperone that binds to the N‐terminal HSP90 domain and inversely to p23 positively regulates HSP90 ATPase activity but has so far not been characterized in plants.…”

Section: Hsp90 Co‐chaperones In Arabidopsismentioning

confidence: 99%

“…Mutants of the two isoforms of the Arabidopsis homolog to mammalian p23 exhibit altered auxin distribution patterns in the root tip and delocalization as well as transcriptional repression of PIN proteins. This may explain a short root phenotype, shorter meristem length and reduced cell number in the division zone and implies p23 isoforms as regulators of PAT . Moreover, the Arabidopsis TPR‐immunophilin FKBP42, twisted dwarf 1 (TWD1), was shown to interact with HSP90 both in vitro and in vivo .…”

Section: Roles Of Hsp90 and Its Co‐chaperones In Hormone Biologymentioning

confidence: 99%

HSP90 and co‐chaperones: a multitaskers’ view on plant hormone biology

Donato

Geisler

2019

FEBS Letters

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In order to survive under ever‐changing conditions plants must be able to adaptively respond to their environment. Plant hormones and the signaling cross‐talk among them play a key role in integrating external and internal cues, enabling the plants to acclimate accordingly. HSP90 and several of its co‐chaperones are known as pleiotropic factors involved in the signaling pathways of multiple stress responses, including temperature, drought, and pathogen infection. Recently, hormone receptor components for auxin and jasmonic acid, respectively, have been identified as clients of the HSP90 chaperone system, suggesting a direct HSP90‐dependent link to hormone signaling. In this review, we give an overview of the multiple roles of HSP90 and its co‐chaperones in plant hormone biology and discuss the largely unexplored targets for signal integration that the activity of these apparent multitaskers may suggest.

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“… Löfke et al (2015) characterize the relative contributions of PIN2 auxin efflux carrier activity in atrichoblasts and root hair cell files. The role of chaperone proteins in maintaining auxin flows is expanded by a study from D’Alessandro et al (2015) in which the p23 chaperone protein is shown to regulate auxin-dependent root development and meristem function. Song et al (2015) characterize interactions between cytokinin biosynthetic genes and nutrient mobilization proteins in Brassica napus development.…”

mentioning

confidence: 99%

Hormone crosstalk in plants

Murphy

2015

EXBOTJ

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The co-chaperone p23 controls root development through the modulation of auxin distribution in theArabidopsisroot meristem

Abstract: Statementp23 co-chaperones play a key role in the root meristem maintenance via regulation of auxin signalling and the consequent balance between cell differentiation and division rate at the transition zone.

Cited by 29 publications

References 38 publications

Genome-Wide Small RNA Analysis of Soybean Reveals Auxin-Responsive microRNAs that are Differentially Expressed in Response to Salt Stress in Root Apex

Genome-Wide Small RNA Analysis of Soybean Reveals Auxin-Responsive microRNAs that are Differentially Expressed in Response to Salt Stress in Root Apex

HSP90 and co‐chaperones: a multitaskers’ view on plant hormone biology

Hormone crosstalk in plants

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