scholarly journals A Sizer model for cell differentiation in Arabidopsis thaliana root growth

2018 ◽  
Vol 14 (1) ◽  
Author(s):  
Irina Pavelescu ◽  
Josep Vilarrasa‐Blasi ◽  
Ainoa Planas‐Riverola ◽  
Mary‐Paz González‐García ◽  
Ana I Caño‐Delgado ◽  
...  
Keyword(s):  
Arabidopsis Thaliana ◽  
Cell Differentiation ◽  
Root Growth

scholarly journals Sound Waves Promote Arabidopsis thaliana Root Growth by Regulating Root Phytohormone Content

2021 ◽  
Vol 22 (11) ◽  
pp. 5739
Author(s):  
Joo Yeol Kim ◽  
Hyo-Jun Lee ◽  
Jin A Kim ◽  
Mi-Jeong Jeong
Keyword(s):  
Arabidopsis Thaliana ◽  
Cell Division ◽  
Root Growth ◽  
Apical Meristem ◽  
Cell Number ◽  
Root Apical Meristem ◽  
Control Group ◽  
Auxin Signaling ◽  
Ethylene Signaling ◽  
Sound Waves

Sound waves affect plants at the biochemical, physical, and genetic levels. However, the mechanisms by which plants respond to sound waves are largely unknown. Therefore, the aim of this study was to examine the effect of sound waves on Arabidopsis thaliana growth. The results of the study showed that Arabidopsis seeds exposed to sound waves (100 and 100 + 9k Hz) for 15 h per day for 3 day had significantly longer root growth than that in the control group. The root length and cell number in the root apical meristem were significantly affected by sound waves. Furthermore, genes involved in cell division were upregulated in seedlings exposed to sound waves. Root development was affected by the concentration and activity of some phytohormones, including cytokinin and auxin. Analysis of the expression levels of genes regulating cytokinin and auxin biosynthesis and signaling showed that cytokinin and ethylene signaling genes were downregulated, while auxin signaling and biosynthesis genes were upregulated in Arabidopsis exposed to sound waves. Additionally, the cytokinin and auxin concentrations of the roots of Arabidopsis plants increased and decreased, respectively, after exposure to sound waves. Our findings suggest that sound waves are potential agricultural tools for improving crop growth performance.

PLC1 and H2O2 Mediated the Allelopathic Effect of Oridonin on Root Growth in Arabidopsis thaliana

2021 ◽  
Author(s):  
Yue Zhang ◽  
Yanhuang An ◽  
Ning Yang ◽  
Wei Wang ◽  
Ruirui Liu ◽  
...  
Keyword(s):  
Arabidopsis Thaliana ◽  
Root Growth ◽  
Allelopathic Effect

scholarly journals PERK–KIPK–KCBP signalling negatively regulates root growth in Arabidopsis thaliana

2014 ◽  
Vol 66 (1) ◽  
pp. 71-83 ◽  
Author(s):  
Tania V. Humphrey ◽  
Katrina E. Haasen ◽  
May Grace Aldea-Brydges ◽  
He Sun ◽  
Yara Zayed ◽  
...  
Keyword(s):  
Arabidopsis Thaliana ◽  
Root Growth

scholarly journals Systems approaches provide new insights into Arabidopsis thaliana root growth under mineral nutrient limitation

2018 ◽  
Author(s):  
Nadia Bouain ◽  
Arthur Korte ◽  
Santosh B. Satbhai ◽  
Seung Y. Rhee ◽  
Wolfgang Busch ◽  
...  
Keyword(s):  
Arabidopsis Thaliana ◽  
Root Growth ◽  
Candidate Genes ◽  
Genome Wide Association Study ◽  
Functional Module ◽  
Molecular Genetic ◽  
Chromatin Modification ◽  
Nutrient Deficiency ◽  
Mineral Nutrient ◽  
A Genome

AbstractThe molecular genetic mechanisms by which plants modulate their root growth rate (RGR) in response to nutrient deficiency are largely unknown. Using a panel of Arabidopsis thaliana natural accessions, we provide a comprehensive combinatorial analysis of RGR variation under macro- and micronutrient deficiency, namely phosphorus (P), iron (Fe), and zinc (Zn), which affect root growth in opposite directions. We found that while -P stimulates early RGR of most accessions, -Fe or -Zn reduces it. The combination of either -P-Fe or -P-Zn leads to suppression of the growth inhibition exerted by -Fe or -Zn alone. Surprisingly, Arabidopsis reference accession Columbia (Col-0) is not representative of the species under -P and -Zn. Using a genome wide association study, we identify candidate genes that control RGR under the assayed nutrient deficiency conditions. By using a network biology driven search using these candidate genes, we further identify a functional module enriched in regulation of cell cycle, DNA replication and chromatin modification that possibly underlies the suppression of root growth reduction in -P-Fe conditions. Collectively, our findings provide a framework for understanding the regulation of RGR under nutrient deficiency, and open new routes for the identification of both large effect genes and favorable allelic variations to improve root growth.

Apical meristem exhaustion during determinate primary root growth in the moots koom 1 mutant of Arabidopsis thaliana

Planta ◽  
2011 ◽  
Vol 234 (6) ◽  
pp. 1163-1177 ◽  
Author(s):  
Alejandra Hernández-Barrera ◽  
Yamel Ugartechea-Chirino ◽  
Svetlana Shishkova ◽  
Selene Napsucialy-Mendivil ◽  
Aleš Soukup ◽  
...  
Keyword(s):  
Arabidopsis Thaliana ◽  
Root Growth ◽  
Apical Meristem ◽  
Primary Root ◽  
Primary Root Growth

Characterisation of three shoot apical meristem mutants of Arabidopsis thaliana

Development ◽  
1992 ◽  
Vol 116 (2) ◽  
pp. 397-403 ◽  
Author(s):  
H. M. Ottoline Leyser ◽  
I. J. Furner
Keyword(s):  
Arabidopsis Thaliana ◽  
Root Growth ◽  
Shoot Apical Meristem ◽  
Apical Meristem ◽  
Floral Development ◽  
Wild Type ◽  
Recessive Mutations ◽  
Phenotypic Characterisation ◽  
Dicotyledonous Plants ◽  
And Function

The shoot apical meristem of dicotyledonous plants is highly regulated both structurally and functionally, but little is known about the mechanisms involved in this regulation. Here we describe the genetic and phenotypic characterisation of recessive mutations at three loci of Arabidopsis thaliana in which meristem structure and function are disrupted. The loci are Clavata1 (Clv1), Fasciata1 (Fas1) and Fasciata2 (Fas2). Plants mutant at these loci are fasciated having broad, flat stems and disrupted phyllotaxy. In all cases, the fasciations are associated with shoot apical meristem enlargement and altered floral development. While all the mutants share some phenotypic features they can be divided into two classes. The pleiotropic fas1 and fas2 mutants are unable to initiate wild- type organs, show major alterations in meristem structure and have reduced root growth. In contrast, clv1 mutant plants show near wild-type organ phenotypes, more subtle changes in shoot apical meristem structure and wild-type root growth.

scholarly journals Coupling of Cell Division and Differentiation in Arabidopsis thaliana Cultured Cells with Interaction of Ethylene and ABA Signaling Pathways

Life ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 15
Author(s):  
Novikova ◽  
Stepanchenko ◽  
Zorina ◽  
Nosov ◽  
Rakitin ◽  
...  
Keyword(s):  
Cell Cycle ◽  
Signal Transduction ◽  
Arabidopsis Thaliana ◽  
Cell Division ◽  
Cell Differentiation ◽  
Signal Transduction Pathway ◽  
Transduction Pathway ◽  
Aba Signaling ◽  
Exogenous Aba ◽  
Ethylene Signal

Recent studies indicate direct links between molecular cell cycle and cell differentiation machineries. Ethylene and abscisic acid (ABA) are known to affect cell division and differentiation, but the mechanisms of such effects are poorly understood. As ethylene and ABA signaling routes may interact, we examined their involvement in cell division and differentiation in cell tissue cultures derived from several Arabidopsis thaliana plants: wild type (Col-0), and ethylene-insensitive mutants etr1-1, ctr1-1, and ein2-1. We designed an experimental setup to analyze the growth-related parameters and molecular mechanisms in proliferating cells upon short exposure to ABA. Here, we provide evidence for the ethylene–ABA signaling pathways’ interaction in the regulation of cell division and differentiation as follows: (1) when the ethylene signal transduction pathway is functionally active (Col-0), the cells actively proliferate, and exogenous ABA performs its function as an inhibitor of DNA synthesis and division; (2) if the ethylene signal is not perceived (etr1-1), then, in addition to cell differentiation (tracheary elements formation), cell death can occur. The addition of exogenous ABA can rescue the cells via increasing proliferation; (3) if the ethylene signal is perceived, but not transduced (ein2-1), then cell differentiation takes place—the latter is enhanced by exogenous ABA while cell proliferation is reduced; (4) when the signal transduction pathway is constitutively active, the cells begin to exit the cell cycle and proceed to endo-reduplication (ctr1-1). In this case, the addition of exogenous ABA promotes reactivation of cell division.

A natural indole alkaloid, norharmane, affects PIN expression patterns and compromises root growth in Arabidopsis thaliana

2020 ◽  
Vol 151 ◽  
pp. 378-390 ◽  
Author(s):  
David López-González ◽  
Aitana Costas-Gil ◽  
Manuel J. Reigosa ◽  
Fabrizio Araniti ◽  
Adela M. Sánchez-Moreiras
Keyword(s):  
Arabidopsis Thaliana ◽  
Root Growth ◽  
Expression Patterns ◽  
Indole Alkaloid

Mitogen-activated protein kinase 6 integrates phosphate and iron responses for indeterminate root growth in Arabidopsis thaliana

Planta ◽  
2019 ◽  
Vol 250 (4) ◽  
pp. 1177-1189 ◽  
Author(s):  
Jesús Salvador López-Bucio ◽  
Guadalupe Jessica Salmerón-Barrera ◽  
Gustavo Ravelo-Ortega ◽  
Javier Raya-González ◽  
Patricia León ◽  
...  
Keyword(s):  
Arabidopsis Thaliana ◽  
Protein Kinase ◽  
Root Growth ◽  
Mitogen Activated Protein Kinase ◽  
Mitogen Activated Protein
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