Regulation of lateral root formation by auxin signaling in Arabidopsis

Fukaki, Hidehiro; Okushima, Yoko; Tasaka, Masao

doi:10.5511/plantbiotechnology.22.393

Cited by 5 publications

(5 citation statements)

References 76 publications

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“…53 It has been reported that ARF7 and ARF19 are involved in the control of cell division patterns during lateral root development. 54 From this group of genes, changes in expression of ARF21 (AT1G34410) in M phase were detected here. This gene gives a chance to be involved in cell division which has to be investigated.…”

Section: Discussionmentioning

confidence: 99%

“…IAA28 protein is transcriptional repressor of auxin-responsive gene expression and inhibits initial cell divisions associated with lateral root initiation. 57,54 In Arabidopsis C2H2-type zinc finger genes are involved in a wide range of functions. [58][59][60] In present study 2 members of C2H2 family; AT3G19580 (AZF2) and AT1G27730 (ZAT10, STZ) were downregulated during cell cycle ( Table 1).…”

Section: Discussionmentioning

confidence: 99%

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Identification of transcription factors linked to cell cycle regulation inArabidopsis

Nayeri

2014

Plant Signaling & Behavior

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Cell cycle is an essential process in growth and development of living organisms consists of the replication and mitotic phases separated by 2 gap phases; G1 and G2. It is tightly controlled at the molecular level and especially at the level of transcription. Precise regulation of the cell cycle is of central significance for plant growth and development and transcription factors are global regulators of gene expression playing essential roles in cell cycle regulation. This study has uncovered TFs that are involved in the control of cell cycle progression. With the aid of multi-parallel quantitative RT-PCR, the expression changes of 1880 TFs represented in the Arabidopsis TF platform was monitored in Arabidopsis synchronous MM2d cells during a 19 h period representing different time points corresponding to the 4 cell cycle phases after treatment of MM2d cells with Aphidicolin. Comparative TF expression analyses performed on synchronous cells resulted in the identification of 239 TFs differentially expressed during the cell cycle, while about one third of TFs were constitutively expressed through all time points. Phase-specific TFs were also identified.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Identification of transcription factors linked to cell cycle regulation inArabidopsis

Nayeri

2014

Plant Signaling & Behavior

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“…Auxin is a key factor for not only the initiation and development of lateral roots [23,30], but also for the lateral root growth angle [31]. The lateral roots of pin3pin4, pin3pin7, and pin3pin4pin7 mutants with impaired polar auxin transport showed a reduced ability to bend in the direction of the gravity vector, thus forming a radial root system with lateral root angles close to 90 • .…”

Section: Discussionmentioning

confidence: 99%

Do DEEPER ROOTING 1 Homologs Regulate the Lateral Root Slope Angle in Cucumber (Cucumis sativus)?

Kiryushkin,

Ilina,

Kiikova

et al. 2024

IJMS

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The architecture of the root system is fundamental to plant productivity. The rate of root growth, the density of lateral roots, and the spatial structure of lateral and adventitious roots determine the developmental plasticity of the root system in response to changes in environmental conditions. One of the genes involved in the regulation of the slope angle of lateral roots is DEEPER ROOTING 1 (DRO1). Its orthologs and paralogs have been identified in rice, Arabidopsis, and several other species. However, nothing is known about the formation of the slope angle of lateral roots in species with the initiation of lateral root primordia within the parental root meristem. To address this knowledge gap, we identified orthologs and paralogs of the DRO1 gene in cucumber (Cucumis sativus) using a phylogenetic analysis of IGT protein family members. Differences in the transcriptional response of CsDRO1, CsDRO1-LIKE1 (CsDRO1L1), and CsDRO1-LIKE2 (CsDRO1L2) to exogenous auxin were analyzed. The results showed that only CsDRO1L1 is auxin-responsive. An analysis of promoter–reporter fusions demonstrated that the CsDRO1, CsDRO1L1, and CsDRO1L2 genes were expressed in the meristem in cell files of the central cylinder, endodermis, and cortex; the three genes displayed different expression patterns in cucumber roots with only partial overlap. A knockout of individual CsDRO1, CsDRO1L1, and CsDRO1L2 genes was performed via CRISPR/Cas9 gene editing. Our study suggests that the knockout of individual genes does not affect the slope angle formation during lateral root primordia development in the cucumber parental root.

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“…mechanical impedances, nutrient patches, water content, etc) in which the root develops (Hodge 2004). The concentration of some low molecular weight compounds in the rhizosphere such as auxins (Casson and Lindsey 2003;Laskowski et al 2006) has been recognized as another factor that contribute to determine root architecture, but mechanisms that regulate this response are basically unknown (Malamy and Benfey 1997;Fukaki et al 2005).…”

Section: Introductionmentioning

confidence: 99%

The effect of root exudates on root architecture in Arabidopsis thaliana

et al. 2011

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Root architecture is of key importance for plant nutrition and performance. It is known that root architecture is determined by genetics and environmental conditions. The aim of the present study was to evaluate if root exudation within a given plant has a role in the development of root architecture. We conducted a series of experiments using Arabidopsis thaliana Ler and Col grown with and without activated charcoal (AC). The addition of AC lowered the concentration of secondary metabolites in the growth media by more than 90%. Our results consistently showed that the addition of AC significantly decreased the number of lateral roots (38% in Ler and 27% in Col), but this decrease was compensated by an increase in the root length per unit of lateral root (83% in Ler and 96% in Col). This compensation resulted in a non-significant effect of AC on the total length of lateral roots. The effects of AC on root architecture were partially or totally reverted by the differential supplementation of root exudates from other plants of the same ecotype. Our results indicate a direct role of secondary metabolites present in the root exudates in the development of root architecture.

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Regulation of lateral root formation by auxin signaling in Arabidopsis

Cited by 5 publications

References 76 publications

Identification of transcription factors linked to cell cycle regulation inArabidopsis

Identification of transcription factors linked to cell cycle regulation inArabidopsis

Do DEEPER ROOTING 1 Homologs Regulate the Lateral Root Slope Angle in Cucumber (Cucumis sativus)?

The effect of root exudates on root architecture in Arabidopsis thaliana

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