scholarly journals Two receptor‐like protein kinases, MUSTACHES and MUSTACHES‐LIKE, regulate lateral root development in Arabidopsis thaliana

2020 ◽  
Vol 227 (4) ◽  
pp. 1157-1173 ◽  
Author(s):  
Qingqing Xun ◽  
Yunzhe Wu ◽  
Hui Li ◽  
Jinke Chang ◽  
Yang Ou ◽  
...  
Keyword(s):  
Arabidopsis Thaliana ◽  
Protein Kinases ◽  
Root Development ◽  
Lateral Root ◽  
Lateral Root Development

PP2A mediates lateral root development under NaCl-induced osmotic stress throughout auxin redistribution in Arabidopsis thaliana

2012 ◽  
Vol 368 (1-2) ◽  
pp. 591-602 ◽  
Author(s):  
Mauricio Nahuam Chávez-Avilés ◽  
Claudia Lizeth Andrade-Pérez ◽  
Homero Reyes de la Cruz
Keyword(s):  
Arabidopsis Thaliana ◽  
Osmotic Stress ◽  
Root Development ◽  
Lateral Root ◽  
Lateral Root Development ◽  
Auxin Redistribution

scholarly journals Flavonols modulate lateral root emergence by scavenging reactive oxygen species in Arabidopsis thaliana

2020 ◽  
pp. jbc.RA120.014543
Author(s):  
Jordan M. Chapman ◽  
Gloria K. Muday
Keyword(s):  
Arabidopsis Thaliana ◽  
Root Development ◽  
Lateral Root ◽  
Lateral Roots ◽  
Negative Regulator ◽  
Wild Type ◽  
Root Primordia ◽  
Lateral Root Primordia ◽  
Lateral Root Development ◽  
Genes Encoding

Flavonoids are a class of specialized metabolites with subclasses including flavonols and anthocyanins, which have unique properties as antioxidants. Flavonoids modulate plant development, but whether and how they impact lateral root development is unclear. We examined potential roles for flavonols in this process using Arabidopsis thaliana mutants with defects in genes encoding key enzymes in flavonoid biosynthesis. We observed the tt4 and fls1 mutants, which produce no flavonols, have increased lateral root emergence. The tt4 root phenotype was reversed by genetic and chemical complementation. To more specifically define the flavonoids involved, we tested an array of flavonoid biosynthetic mutants, eliminating roles for anthocyanins and the flavonols quercetin and isorhamnetin in modulating root development. Instead, two tt7 mutant alleles, with defects in a branchpoint enzyme blocking quercetin biosynthesis, formed reduced numbers of lateral roots, and tt7-2 had elevated levels of kaempferol. Using a flavonol-specific dye, we observed that in the tt7-2 mutant, kaempferol accumulated within lateral root primordia at higher levels than wild-type. These data are consistent with kaempferol, or downstream derivatives, acting as a negative regulator of lateral root emergence. We examined ROS accumulation using ROS-responsive probes and found reduced fluorescence of a superoxide-selective probe within the primordia of tt7-2 compared to wild type, but not in the tt4 mutant, consistent with opposite effects of these mutants on lateral root emergence. These results support a model in which increased level of kaempferol in the lateral root primordia of tt7-2 reduces superoxide concentration and ROS-stimulated lateral root emergence.

scholarly journals PRH1 mediates ARF7-LBD dependent auxin signaling to regulate lateral root development in Arabidopsis thaliana

2019 ◽  
Author(s):  
Feng Zhang ◽  
Wenqing Tao ◽  
Ruiqi Sun ◽  
Junxia Wang ◽  
Cuiling Li ◽  
...  
Keyword(s):  
Arabidopsis Thaliana ◽  
Transcription Factors ◽  
Root Development ◽  
Lateral Root ◽  
Lateral Roots ◽  
Auxin Signaling ◽  
Auxin Response ◽  
Cell Identity ◽  
Lateral Root Development ◽  
Lateral Organ

AbstractThe development of lateral roots in Arabidopsis thaliana is strongly dependent on signaling directed by the AUXIN RESPONSE FACTOR7 (ARF7), which in turn activates LATERAL ORGAN BOUNDARIES DOMAIN (LBD) transcription factors (LBD16, 18, 29 and 33). Here, the product of PRH1, a PR-1 homolog annotated previously as encoding a pathogen-responsive protein, was identified as a target of ARF7-mediated auxin signaling and also as participating in the development of lateral roots. PRH1 was shown to be strongly induced by auxin treatment, and plants lacking a functional copy of PRH1 formed fewer lateral roots. The transcription of PRH1 was controlled by the binding of both ARF7 and LBDs to its promoter region. An interaction was detected between PRH1 and GATA23, a protein which regulates cell identity in lateral root founder cells.Author SummaryIn Arabidopsis thaliana AUXIN RESPONSE FACTOR7 (ARF7)-mediated auxin signaling plays a key role in lateral roots (LRs) development. The LATERAL ORGAN BOUNDARIES DOMAIN (LBD) transcription factors (LBD16, 18, 29 and 33) act downstream of ARF7-mediated auxin signaling to control LRs formation. Here, the PR-1 homolog PRH1 was identified as a novel target of both ARF7 and LBDs (especially the LBD29) during auxin induced LRs formation, as both ARF7 and LBDs were able to bind to the PRH1 promoter. More interestingly, PRH1 has a physical interaction with GATA23, which has been also reported to be up-regulated by auxin and influences LR formation through its regulation of LR founder cell identity. Whether the interaction between GATA23 and PRH1 affects the stability and/or the activity of either (or both) of these proteins remains an issue to be explored. This study provides improves new insights about how auxin regulates lateral root development.

An atypical aspartic protease modulates lateral root development in Arabidopsis thaliana

2019 ◽  
Vol 70 (7) ◽  
pp. 2157-2171 ◽  
Author(s):  
André Soares ◽  
Stefan Niedermaier ◽  
Rosário Faro ◽  
Andreas Loos ◽  
Bruno Manadas ◽  
...  
Keyword(s):  
Arabidopsis Thaliana ◽  
Root Development ◽  
Lateral Root ◽  
Aspartic Protease ◽  
Lateral Root Development

scholarly journals Arabidopsis thaliana mitogen-activated protein kinase 6 is involved in seed formation and modulation of primary and lateral root development

2013 ◽  
Vol 65 (1) ◽  
pp. 169-183 ◽  
Author(s):  
J. S. López-Bucio ◽  
J. G. Dubrovsky ◽  
J. Raya-González ◽  
Y. Ugartechea-Chirino ◽  
J. López-Bucio ◽  
...  
Keyword(s):  
Arabidopsis Thaliana ◽  
Protein Kinase ◽  
Root Development ◽  
Lateral Root ◽  
Mitogen Activated Protein Kinase ◽  
Seed Formation ◽  
Lateral Root Development ◽  
Mitogen Activated Protein
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