Abscisic Acid Antagonizes Ethylene-Induced Hyponastic Growth in Arabidopsis

Benschop, Joris J.; Millenaar, Frank F.; Smeets, Maaike E.; Zanten, Martijn van; Voesenek, Laurentius A. C. J.; Peeters, Anton J. M.

doi:10.1104/pp.106.092700

Cited by 64 publications

(89 citation statements)

References 57 publications

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“…Exogenous application of ethylene to aba2-1 and aba3-1 mutants signifi cantly enhanced its leaf hyponastic growth compared to wild-type plants. Similarly, the ABAhypersensitive era1-2 showed complete elimination of ethyleneinduced leaf hyponasty ( Benschop et al, 2007 ).…”

Section: Seed Dormancy and Germinationmentioning

confidence: 93%

“…Genetic and pharmacological evidences suggest that abscisic acid (ABA) can attenuate ethylene-induced leaf hyponastic growth ( Benschop et al, 2007 ). Mutants that are impaired in ABA biosynthesis, such as aba1-1 , aba2-1 , and aba3-1 , showed higher initial petiole angles than in wild-type Arabidopsis plants in the absence of exogenous ethylene.…”

Section: Seed Dormancy and Germinationmentioning

confidence: 99%

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Contributions of green light to plant growth and development

Wang

Folta

2013

American J of Botany

202

119

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Light passing through or refl ected from adjacent foliage provides a developing plant with information that is used to guide specifi c genetic and physiological processes. Changes in gene expression underlie adaptation to, or avoidance of, the light-compromised environment. These changes have been well described and are mostly attributed to a decrease in the red light to far-red light ratio and/or a reduction in blue light fl uence rate. In most cases, these changes rely on the integration of red/far-red/blue light signals, leading to changes in phytohormone levels. Studies over the last decade have described distinct responses to green light and/or a shift of the blue-green, or red-green ratio. Responses to green light are typically low-light responses, suggesting that they may contribute to the adaptation to growth under foliage or within close proximity to other plants. This review summarizes the growth responses in artifi cially manipulated light environments with an emphasis on the roles of green wavebands. The information may be extended to understanding the infl uence of green light in shade avoidance responses as well as other plant developmental and physiological processes.

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Section: Seed Dormancy and Germinationmentioning

confidence: 93%

Section: Seed Dormancy and Germinationmentioning

confidence: 99%

Contributions of green light to plant growth and development

Wang

Folta

2013

American J of Botany

202

119

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“…First, reference genes must show an expression level which is high enough to be quantified easily, or at least without difficulty, in applications, particularly RT-qPCR. To determine a practical threshold to evaluate the ease of quantification, distributions of FPKM values were investigated in 16 genes that have been practically used in RTqPCR as reference genes by researchers (Abiko et al, 2005;Benschop et al, 2007;Papdi et al, 2008;Streitner et al, 2008;Li et al, 2009;Li et al, 2010;Fontaine et al, 2012;Kudo et al, 2012;Zhang et al, 2013;Wang et al, 2014;Yin et al, 2014;Gonzalez-Cabanelas et al, 2015;Kamada-Nobusada et al, 2015;Patil et al, 2015;Zhai et al, 2015). In 15 of the 16 genes, the 25th percentile of the FPKM values was above 10; the exception was the Arabidopsis PPR gene, all of whose FPKM values were below 10 ( Supplementary Fig.…”

Section: Resultsmentioning

confidence: 99%

Identification of reference genes for quantitative expression analysis using large-scale RNA-seq data of <i>Arabidopsis thaliana</i> and model crop plants

et al. 2016

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In quantitative gene expression analysis, normalization using a reference gene as an internal control is frequently performed for appropriate interpretation of the results. Efforts have been devoted to exploring superior novel reference genes using microarray transcriptomic data and to evaluating commonly used reference genes by targeting analysis. However, because the number of specifically detectable genes is totally dependent on probe design in the microarray analysis, exploration using microarray data may miss some of the best choices for the reference genes. Recently emerging RNA sequencing (RNA-seq) provides an ideal resource for comprehensive exploration of reference genes since this method is capable of detecting all expressed genes, in principle including even unknown genes. We report the results of a comprehensive exploration of reference genes using public RNA-seq data from plants such as Arabidopsis thaliana (Arabidopsis), Glycine max (soybean), Solanum lycopersicum (tomato) and Oryza sativa (rice). To select reference genes suitable for the broadest experimental conditions possible, candidates were surveyed by the following four steps: (1) evaluation of the basal expression level of each gene in each experiment; (2) evaluation of the expression stability of each gene in each experiment; (3) evaluation of the expression stability of each gene across the experiments; and (4) selection of top-ranked genes, after ranking according to the number of experiments in which the gene was expressed stably. Employing this procedure, 13, 10, 12 and 21 top candidates for reference genes were proposed in Arabidopsis, soybean, tomato and rice, respectively. Microarray expression data confirmed that the expression of the proposed reference genes under broad experimental conditions was more stable than that of commonly used reference genes. These novel reference genes will be useful for analyzing gene expression profiles across experiments carried out under various experimental conditions.

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“…ethylene, abscisic acid, GAs, and auxin) in controlling hyponasty under various conditions have been studied (Mullen et al, 2006;Benschop et al, 2007;Millenaar et al, 2009;Van Zanten et al, 2009, 2010bPeña-Castro et al, 2011). The volatile phytohormone ethylene is a key component in the complex regulatory network of hyponastic growth.…”

mentioning

confidence: 99%

“…Ethylene is the trigger and a positive regulator of hyponastic growth in submerged and waterlogged Arabidopsis (Millenaar et al, 2005Van Zanten et al, 2010b;Rauf et al, 2013) and a negative regulator of high temperature-induced hyponasty ), but is not involved in low lightinduced hyponastic growth in this species . Abscisic acid antagonizes ethylene-induced hyponasty (Benschop et al, 2007) and is a positive regulator of high temperature-induced hyponastic growth ). The growth-promoting GAs positively regulate hyponastic response to all three environmental signals (Peña-Castro et al, 2011), whereas auxins promote low light and high temperature-induced hyponastic growth (Millenaar et al, 2005;Koini et al, 2009;Van Zanten et al, 2009), as well as low red:far-red-and low blue light-induced hyponasty (Moreno et al, 2009;Keller et al, 2011).…”

mentioning

confidence: 99%

Ethylene-Mediated Regulation of A2-Type CYCLINs Modulates Hyponastic Growth in Arabidopsis

Polko¹,

Rooij

Vanneste

et al. 2015

Plant Physiology

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(S.V., G.V.I., T.B.)Upward leaf movement (hyponastic growth) is frequently observed in response to changing environmental conditions and can be induced by the phytohormone ethylene. Hyponasty results from differential growth (i.e. enhanced cell elongation at the proximal abaxial side of the petiole relative to the adaxial side). Here, we characterize Enhanced Hyponasty-D, an activation-tagged Arabidopsis (Arabidopsis thaliana) line with exaggerated hyponasty. This phenotype is associated with overexpression of the mitotic cyclin CYCLINA2;1 (CYCA2;1), which hints at a role for cell divisions in regulating hyponasty. Indeed, mathematical analysis suggested that the observed changes in abaxial cell elongation rates during ethylene treatment should result in a larger hyponastic amplitude than observed, unless a decrease in cell proliferation rate at the proximal abaxial side of the petiole relative to the adaxial side was implemented. Our model predicts that when this differential proliferation mechanism is disrupted by either ectopic overexpression or mutation of CYCA2;1, the hyponastic growth response becomes exaggerated. This is in accordance with experimental observations on CYCA2;1 overexpression lines and cyca2;1 knockouts. We therefore propose a bipartite mechanism controlling leaf movement: ethylene induces longitudinal cell expansion in the abaxial petiole epidermis to induce hyponasty and simultaneously affects its amplitude by controlling cell proliferation through CYCA2;1. Further corroborating the model, we found that ethylene treatment results in transcriptional down-regulation of A2-type CYCLINs and propose that this, and possibly other regulatory mechanisms affecting CYCA2;1, may contribute to this attenuation of hyponastic growth.

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Abscisic Acid Antagonizes Ethylene-Induced Hyponastic Growth in Arabidopsis

Cited by 64 publications

References 57 publications

Contributions of green light to plant growth and development

Contributions of green light to plant growth and development

Identification of reference genes for quantitative expression analysis using large-scale RNA-seq data of <i>Arabidopsis thaliana</i> and model crop plants

Ethylene-Mediated Regulation of A2-Type CYCLINs Modulates Hyponastic Growth in Arabidopsis

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