Recessive and dominant mutations in the ethylene biosynthetic gene
 ACS
 5
 of
 Arabidopsis
 confer cytokinin insensitivity and ethylene overproduction, respectively

Vogel, John P.; Woeste, Keith; Theologis, Athanasios; Kieber, Joseph J.

doi:10.1073/pnas.95.8.4766

Cited by 320 publications

(298 citation statements)

References 48 publications

(48 reference statements)

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“…However, several lines of evidence indicate that this is not the result of altered ethylene levels: (1) mutants that increase or decrease ethylene biosynthesis do not show a root-swelling phenotype (Vogel et al, 1998); (2) the fei phenotype cannot be reversed by blocking ethylene perception; and (3) in nonpermissive conditions, ethylene production is not substantially altered in fei1 fei2 mutant roots. Thus, we conclude that the FEIs do not alter ACS activity or levels and that the FEIs do not act via ethylene.…”

Section: Role Of Acs5 In the Sos5/fei Pathwaymentioning

confidence: 99%

“…The vials were capped and incubated for 24 h at 238C in the dark, and the accumulated ethylene was measured as described by Vogel et al (1998). For etiolated tissue, seedlings (;40 per vial) were grown in 22-mL gas chromatography vials containing 3 mL of MS medium in the dark for 4 d. The accumulated ethylene was measured by gas chromatography as described (Vogel et al, 1998).…”

Section: Measurement Of Ethylene Productionmentioning

confidence: 99%

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Two Leucine-Rich Repeat Receptor Kinases Mediate Signaling, Linking Cell Wall Biosynthesis and ACC Synthase in Arabidopsis

et al. 2008

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The plant cell wall is a dynamic structure that changes in response to developmental and environmental cues through poorly understood signaling pathways. We identified two Leu-rich repeat receptor-like kinases in Arabidopsis thaliana that play a role in regulating cell wall function. Mutations in these FEI1 and FEI2 genes (named for the Chinese word for fat) disrupt anisotropic expansion and the synthesis of cell wall polymers and act additively with inhibitors or mutations disrupting cellulose biosynthesis. While FEI1 is an active protein kinase, a kinase-inactive version of FEI1 was able to fully complement the fei1 fei2 mutant. The expansion defect in fei1 fei2 roots was suppressed by inhibition of 1-aminocyclopropane-1-carboxylic acid (ACC) synthase, an enzyme that converts Ado-Met to ACC in ethylene biosynthesis, but not by disruption of the ethylene response pathway. Furthermore, the FEI proteins interact directly with ACC synthase. These results suggest that the FEI proteins define a novel signaling pathway that regulates cell wall function, likely via an ACC-mediated signal.

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Section: Role Of Acs5 In the Sos5/fei Pathwaymentioning

confidence: 99%

Section: Measurement Of Ethylene Productionmentioning

confidence: 99%

Two Leucine-Rich Repeat Receptor Kinases Mediate Signaling, Linking Cell Wall Biosynthesis and ACC Synthase in Arabidopsis

et al. 2008

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“…Although cytokinin can induce ethylene biosynthesis in plants (Vogel et al 1998a;Vogel et al 1998b), it has been shown that cytokinin, an antisenescence hormone, often produces physiological effects opposite of ethylene, a senescence hormone. It is therefore possible that expression of the LEACO1 0.821kb-ipt gene, which leads to an increase in cytokinin concentrations in plants, may result in an inhibition of LEACO1 0.821kb gene promoter activity, that is similar to the expression of the SAG12-ipt (Gan and Amasino 1995).…”

Section: Discussionmentioning

confidence: 99%

Expression of ipt gene controlled by an ethylene and auxin responsive fragment of the LEACO1 promoter increases flower number in transgenic Nicotiana tabacum

et al. 2006

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“…It is known that both auxin and cytokinin can synergistically activate the biosynthesis of ethylene (Vogel et al, 1998;Stepanova et al, 2007). However, ethylene can also be synthesized without exogenous auxin and cytokinin application, such as in its role in root hair production (Tanimoto et al, 1995).…”

Section: Construction Of a Hormonal Crosstalk Network Based On Experimentioning

confidence: 99%

Modelling Plant Hormone Gradients

Moore

Zhang

Lindsey

2015

Encyclopedia of Life Sciences

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Cellular patterning in the Arabidopsis root is coordinated via a localised auxin concentration maximum in the root tip, requiring the regulated expression of specific genes. The activities of plant hormones such as auxin, ethylene and cytokinin depend on cellular context and exhibit either synergistic or antagonistic interactions. Due to the complexity and nonlinearity of spatiotemporal interactions between both hormones and gene expression in root development, modelling plant hormone gradients requires a systems approach in which experimental data and modelling analysis are closely combined. Modelling therefore allows a predictive interrogation of highly complex and nonintuitive interactions between components in the system. Important factors to be considered when modelling hormone gradients include the construction of a hormonal crosstalk network, the formulation of kinetic equations and the construction of an in silico root map. A modelling approach enables the analysis of relationships between multiple hormone gradients, predictions on how hormone gradients emerge under the action of hormonal crosstalk, and the prediction and elucidation of experimental results from mutant roots. Key Concepts Patterning in Arabidopsis root development is coordinated via a localised auxin concentration maximum in the root tip, requiring the regulated expression of specific genes. The activities of plant hormones such as auxin, ethylene, cytokinin, abscisic acid, gibberellin and brassinosteroids depend on cellular context and exhibit either synergistic or antagonistic interactions. Auxin concentration and the associated regulatory and target genes are regulated by diverse interacting hormones and gene expression and therefore cannot change independently of the various crosstalk components in space and time. Other hormone concentrations, such as ethylene and cytokinin concentrations, and expression of the associated regulatory and target genes are also interlinked. Modelling plant hormone gradients requires a systems approach where experimental data and modelling analysis are closely combined. A hormonal crosstalk network describes the regulatory relationships between hormones and their associated genes. A kinetic equation can be formulated for any regulatory relationship following thermodynamic and kinetic principles. Construction of an in silico root map enables the study of multicellular cell–cell communications in Arabidopsis root development. Modelling hormone gradients enables the analysis of relationships between multiple hormone gradients, predictions on how hormone gradients emerge under the action of hormonal crosstalk, and the prediction and elucidation of experimental results from mutant roots. Modelling auxin gradients can also incorporate different mechanisms of polar auxin transport and the interaction of hormone gradients and root growth.

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Recessive and dominant mutations in the ethylene biosynthetic gene ACS 5 of Arabidopsis confer cytokinin insensitivity and ethylene overproduction, respectively

Cited by 320 publications

References 48 publications

Two Leucine-Rich Repeat Receptor Kinases Mediate Signaling, Linking Cell Wall Biosynthesis and ACC Synthase in Arabidopsis

Two Leucine-Rich Repeat Receptor Kinases Mediate Signaling, Linking Cell Wall Biosynthesis and ACC Synthase in Arabidopsis

Expression of ipt gene controlled by an ethylene and auxin responsive fragment of the LEACO1 promoter increases flower number in transgenic Nicotiana tabacum

Modelling Plant Hormone Gradients

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