Root growth movements: Waving and skewing

Roy, Roshni; Bassham, Diane C.

doi:10.1016/j.plantsci.2014.01.007

Cited by 54 publications

(61 citation statements)

References 64 publications

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“…Left-handed twisting occurs in Ler plants treated with the microtubuledestabilizing drug propyzamide (Nakamura et al, 2004) and in mutants such as microtubule organization1 (Whittington et al, 2001;Sugimoto et al, 2003), lefty1, and lefty2 (Thitamadee et al, 2002). In addition to mutations that alter microtubule dynamics, sometimes mutants that modulate actin dynamics, ethylene levels, or auxin transport also have altered cell file rotation patterns (Buer et al, 2003;Yuen et al, 2003;Millar et al, 2011;Roy and Bassham, 2014). Although cell file rotation occurred in the tan1 air9 mutants, the roots themselves did not show obvious root skewing in classical tilted agar experiments.…”

Section: Potential Interphase Function Of Tan1 and Air9mentioning

confidence: 99%

“…In contrast, AIR9 transcripts accumulate across many cell types, including those that do not divide (Winter et al, 2007). Although the underlying causes of cell file rotation implicate circumnutation, gravity, and mechanosensing responses, they are not completely understood (Migliaccio and Piconese, 2001;Weizbauer et al, 2011;Roy and Bassham, 2014). Several mutants that alter microtubule dynamics also have cell file rotation defects.…”

Section: Potential Interphase Function Of Tan1 and Air9mentioning

confidence: 99%

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Division Plane Orientation Defects Revealed by a Synthetic Double Mutant Phenotype

et al. 2017

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ORCID IDs: 0000-0003-1506-4683 (R.M.); 0000-0003-4881-6343 (V.H.M.); 0000-0002-4354-6295 (C.G.R.). TANGLED1 (TAN1) and AUXIN-INDUCED-IN-ROOTS9(AIR9) are microtubule-binding proteins that localize to the division site in plants. Their function in Arabidopsis (Arabidopsis thaliana) remained unclear because neither tan1 nor air9 single mutants have a strong phenotype. We show that tan1 air9 double mutants have a synthetic phenotype consisting of short, twisted roots with disordered cortical microtubule arrays that are hypersensitive to a microtubule-depolymerizing drug. The tan1 air9 double mutants have significant defects in division plane orientation due to failures in placing the new cell wall at the correct division site. Full-length TAN1 fused to yellow fluorescent protein, TAN1-YFP, and several deletion constructs were transformed into the double mutant to assess which regions of TAN1 are required for its function in root growth, root twisting, and division plane orientation. TAN1-YFP expressed in tan1 air9 significantly rescued the double mutant phenotype in all three respects. Interestingly, TAN1 missing the first 126 amino acids, TAN1-DI-YFP, failed to rescue the double mutant phenotype, while TAN1 missing a conserved middle region, TAN1-DII-YFP, significantly rescued the mutant phenotype in terms of root growth and division plane orientation but not root twisting. We use the tan1 air9 double mutant to discover new functions for TAN1 and AIR9 during phragmoplast guidance and root morphogenesis.Plant cells are typically constrained by cell walls (Cosgrove, 2005) that are also connected via plasmodesmata (Brunkard and Zambryski, 2017), and they do not migrate relative to each other. In the absence of significant cell migration, the entire plant body must be built through elegant coordination between the division, expansion, and differentiation of cells. Therefore, division plane orientation, or the spatial control of cytokinesis, has important roles in plant development and growth (Pickett-Heaps et al., 1999).The key steps of plant division plane orientation occur during interphase, G2, and mitosis. During interphase, the cortical microtubule array typically aligns perpendicular to the cell expansion axis (Baskin, 2001), and during G2 (Gunning and Wick, 1985), this promotes the formation of a land plant-specific microtubule and microfilament array called the preprophase band (PPB;Pickett-Heaps and Northcote, 1966). Although the location of the PPB accurately predicts the future division site (Gunning et al., 1978;Van Damme et al., 2007;Rasmussen et al., 2013;Lipka et al., 2014;Martinez et al., 2017), its role in division plane establishment has recently been called into question by mutants that do not form obvious PPBs but manage to produce relatively orderly roots. These plants have mutations in the tonneau1a locus (Zhang et al., 2016) and mutations in three related tonneau1 recruiting motif (trm) loci (Schaefer et al., 2017). Whether the PPB establishes the future division site or is the signpost of an ear...

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Section: Potential Interphase Function Of Tan1 and Air9mentioning

confidence: 99%

Section: Potential Interphase Function Of Tan1 and Air9mentioning

confidence: 99%

Division Plane Orientation Defects Revealed by a Synthetic Double Mutant Phenotype

et al. 2017

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“…Elucidating the molecular mechanism of hydrotropism in roots is important both for understanding plant adaptation to soil moisture gradients and improving crop productivity. Root growth is strongly directed by gravity and also by other tropisms like photo-, thigmo-or hydrotropism (2). The study of this latter process is complicated by the fact that gravitropism and hydrotropism influence each other and make it difficult to observe hydrotropism in isolation.…”

Section: Introductionmentioning

confidence: 99%

Hydrotropism: Analysis of the Root Response to a Moisture Gradient

Antoni

Dietrich

Bennett

et al. 2016

Methods in Molecular Biology

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Running title: Hydrotropic root response to a moisture gradient 2 SummaryHydrotropism is a genuine response of roots to a moisture gradient to avoid drought. An experimental system for the induction of hydrotropic root response in Petri dishes was designed by pioneering groups in the field. This system uses split agar plates containing an osmolyte only in a region of the plate in order to generate a water potential gradient.Arabidopsis seedlings are placed on the MS agar plate so that their root tips are near the junction between plain MS medium and the region supplemented with the osmolyte. It elicits a hydrotropic response in Arabidopsis roots that can be measured as the root curvature angle.

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“…Organization of cytoskeleton is one of the key factors to determine root movements (reviewed by Roy and Bassham 2014). Microtubule dynamics would determine the handedness of root twisting (Sedbrook and Kaloriti 2008).…”

Section: Introductionmentioning

confidence: 99%

“…Regulation of root growth is mediated by a comprehensive crosstalk of signal transduction pathways (Roy and Bassham 2014). Nitric oxide (NO) has been found to be involved in the pathway of auxin-regulated lateral root development in tomato (Correa-Aragunde et al 2004).…”

Section: Introductionmentioning

confidence: 99%

Light-modulated seminal wavy roots in rice mediated by nitric oxide-dependent signaling

2015

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Rice (Oryza sativa L.) seminal roots from germinated seeds help establish seedlings, but the seminal root growth and morphology are sensitive to environmental factors. Our previous research showed that several indica-type rice varieties such as Taichung native 1 (TCN1) showed light-induced wavy roots. Also, auxin and oxylipins are two signaling factors regulating the wavy root photomorphology. To investigate the signaling pathway, here, we found that nitric oxide (NO) was a second messenger triggering the signal transduction of light stimuli to induce the wavy morphology of seminal roots in rice. Moreover, interactions between oxylipins and phytohormones such as ethylene and auxin participating in the NO-dependent regulatory pathway of light-induced wavy roots were examined. The order of action of signaling components in the pathway was NO, oxylipins, ethylene, and auxin.

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Root growth movements: Waving and skewing

Cited by 54 publications

References 64 publications

Division Plane Orientation Defects Revealed by a Synthetic Double Mutant Phenotype

Division Plane Orientation Defects Revealed by a Synthetic Double Mutant Phenotype

Hydrotropism: Analysis of the Root Response to a Moisture Gradient

Light-modulated seminal wavy roots in rice mediated by nitric oxide-dependent signaling

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