Evolution and genetics of root hair stripes in the root epidermis

Dolan, Liam; Costa, Sílvia

doi:10.1093/jxb/52.suppl_1.413

Cited by 58 publications

(46 citation statements)

References 10 publications

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“…In plants, the formation of the root hair and non-hair cells in the root epidermis has been used extensively as a simple and experimentally tractable model for studying cell fate patterning (Dolan and Costa, 2001;Larkin et al, 2003). The root epidermal cell types are not essential for growth under laboratory conditions, they are easy to examine, and they arise continuously during development.…”

Section: Introductionmentioning

confidence: 99%

The bHLH genesGL3andEGL3participate in an intercellular regulatory circuit that controls cell patterning in theArabidopsisroot epidermis

et al. 2005

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Section: Introductionmentioning

confidence: 99%

The bHLH genesGL3andEGL3participate in an intercellular regulatory circuit that controls cell patterning in theArabidopsisroot epidermis

et al. 2005

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“…In Arabidopsis, root hairs normally arise from epidermal cells that contact two underlying cortical cells (the socalled H position), whereas epidermal cells overlying a single cortical cell (in the N position) develop into nonhair cells (Dolan et al, 1993;Galway et al, 1994). This positiondependent hair cell differentiation thus results in a striped pattern of hair cell files along the long axis of the root, which is found in members of Brassicaceae and in a few species of other families (Cormack, 1947;Dolan and Costa, 2001). Root hair development in Arabidopsis can be divided into three phases: cell specification, initiation, and elongation.…”

Section: Introductionmentioning

confidence: 99%

Regulation of Root Hair Initiation and Expansin Gene Expression in Arabidopsis[W]

2002

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The expression of two Arabidopsis expansin genes ( AtEXP7 and AtEXP18 ) is tightly linked to root hair initiation; thus, the regulation of these genes was studied to elucidate how developmental, hormonal, and environmental factors orchestrate root hair formation. Exogenous ethylene and auxin, as well as separation of the root from the medium, stimulated root hair formation and the expression of these expansin genes. The effects of exogenous auxin and root separation on root hair formation required the ethylene signaling pathway. By contrast, blocking the endogenous ethylene pathway, either by genetic mutations or by a chemical inhibitor, did not affect normal root hair formation and expansin gene expression. These results indicate that the normal developmental pathway for root hair formation (i.e., not induced by external stimuli) is independent of the ethylene pathway. Promoter analyses of the expansin genes show that the same promoter elements that determine cell specificity also determine inducibility by ethylene, auxin, and root separation. Our study suggests that two distinctive signaling pathways, one developmental and the other environmental/ hormonal, converge to modulate the initiation of the root hair and the expression of its specific expansin gene set.

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“…Type 3 is position-dependent hair cell differentiation: root hair is located over epidermal cell overlying the junction of two cortical cells, whereas non-hair cell is located over a single cortical cell (positionally cued type). This positionally cued type has been found in Arabidopsis (Cormack, 1947;Dolan et al, 1993;Galway et al, 1994;Clowes, 2000;Dolan and Costa, 2001). …”

Section: Root Hair Initiationmentioning

confidence: 65%

Effects and Mechanism of Nutrients on Root Hair Growth

Gong¹,

Hu²,

Yang³

et al. 2017

Int. J. Curr. Res. Biosci. Plant Biol.

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A b s t r a c t A r t i c l e I n f oRoot hair is tubular projections from the root epidermal cell. In general, root-hair formation results in a significant increase in root surface area, which plays the important roles in nutrients and water uptake, plant anchorage, and interaction with soil microorganisms. In this paper, we discussed the effects of nitrogen, phosphorus, potassium, calcium, iron, and magnesium on root hair growth and their relevant mechanisms. Interaction exists between nutrients and phytohormones on root hair growth has also been discussion. As a result, more works are needed to clone the genes of additional root hair mutants and elucidate their roles, as well as undertaking reverse genetics and mutant complementation studies to add the current knowledge of the signaling networks, which are involved in root hair cell fate specification, initiation, tip growth and maturation regulated by nutrients.

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Evolution and genetics of root hair stripes in the root epidermis

Cited by 58 publications

References 10 publications

The bHLH genesGL3andEGL3participate in an intercellular regulatory circuit that controls cell patterning in theArabidopsisroot epidermis

The bHLH genesGL3andEGL3participate in an intercellular regulatory circuit that controls cell patterning in theArabidopsisroot epidermis

Regulation of Root Hair Initiation and Expansin Gene Expression in Arabidopsis[W]

Effects and Mechanism of Nutrients on Root Hair Growth

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