HDG11 upregulates cell-wall-loosening protein genes to promote root elongation in Arabidopsis

Xu, Ping; Cai, Xiao-Teng; Wang, Yao; Lü, Xing; Chen, Qiong; Xiang, Cheng‐Bin

doi:10.1093/jxb/eru202

Cited by 83 publications

(67 citation statements)

References 53 publications

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“…A similar induction pattern of several expansin genes was also observed in Arabidopsis under soil water-deficit treatment (Harb et al, 2010). Consistent with these findings, overexpression of expansin genes has been reported to confer tolerance to various water-deficit stresses in different plant species, likely by maintaining root elongation, though these results should not be overinterpreted, as overexpression of expansins may lead to many pleiotropic effects on physiology that are not directly related to root growth (Guo et al, 2011;Lü et al, 2013;Xu et al, 2014).…”

Section: Changes In the Cell Wall Enable Growth Recoverysupporting

confidence: 69%

Growing Out of Stress: The Role of Cell- and Organ-Scale Growth Control in Plant Water-Stress Responses

et al. 2016

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Water is the most limiting resource on land for plant growth, and its uptake by plants is affected by many abiotic stresses, such as salinity, cold, heat, and drought. While much research has focused on exploring the molecular mechanisms underlying the cellular signaling events governing water-stress responses, it is also important to consider the role organismal structure plays as a context for such responses. The regulation of growth in plants occurs at two spatial scales: the cell and the organ. In this review, we focus on how the regulation of growth at these different spatial scales enables plants to acclimate to water-deficit stress. The cell wall is discussed with respect to how the physical properties of this structure affect water loss and how regulatory mechanisms that affect wall extensibility maintain growth under water deficit. At a higher spatial scale, the architecture of the root system represents a highly dynamic physical network that facilitates access of the plant to a heterogeneous distribution of water in soil. We discuss the role differential growth plays in shaping the structure of this system and the physiological implications of such changes.

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Section: Changes In the Cell Wall Enable Growth Recoverysupporting

confidence: 69%

Growing Out of Stress: The Role of Cell- and Organ-Scale Growth Control in Plant Water-Stress Responses

et al. 2016

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“…The 35S‐HA‐ EDT1 / HDG11 transgenic plants were generated and the plants showing similar phenotype to edt1D mutant were used for ChIP assay (Xu et al ). The promoter fragments enriched by anti‐HA antibodies (Abmart, http://www.ab-mart.com.cn) can be detected by PCR.…”

Section: Resultsmentioning

confidence: 99%

Activated expression of AtEDT1/HDG11 promotes lateral root formation in Arabidopsis mutant edt1 by upregulating jasmonate biosynthesis

Cai

Wang

et al. 2015

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Root architecture is crucial for plants to absorb water and nutrients. We previously reported edt1 (edt1D) mutant with altered root architecture that contributes significantly to drought resistance. However, the underlying molecular mechanisms are not well understood. Here we report one of the mechanisms underlying EDT1/HDG11-conferred altered root architecture. Root transcriptome comparison between the wild type and edt1D revealed that the upregulated genes involved in jasmonate biosynthesis and signaling pathway were enriched in edt1D root, which were confirmed by quantitative RT-PCR. Further analysis showed that EDT1/HDG11, as a transcription factor, bound directly to the HD binding sites in the promoters of AOS, AOC3, OPR3, and OPCL1, which encode four key enzymes in JA biosynthesis. We found that the jasmonic acid level was significantly elevated in edt1D root compared with that in the wild type subsequently. In addition, more auxin accumulation was observed in the lateral root primordium of edt1D compared with that of wild type. Genetic analysis of edt1D opcl1 double mutant also showed that HDG11 was partially dependent on JA in regulating LR formation. Taken together, overexpression of EDT1/HDG11 increases JA level in the root of edt1D by directly upregulating the expressions of several genes encoding JA biosynthesis enzymes to activate auxin signaling and promote lateral root formation.

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“…We provide multiple lines of supporting evidence including yeast-one-hybrid, EMSA and ChIP assays, as well as the genetic analysis that established the interaction between ERF109 and the promoters of both ASA1 and YUC2 genes (Figs 6 and 7). The native promoter of ERF109 was initially used for ChIP assay without success, which was probably due to low expression level of ERF109, and has been similarly noted for other transcription factors with low expression 51 . However, when we used a stronger promoter, the results showed that ASA1 and YUC2 were targets of ERF109.…”

Section: Discussionmentioning

confidence: 99%

Arabidopsis ERF109 mediates cross-talk between jasmonic acid and auxin biosynthesis during lateral root formation

et al. 2014

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Jasmonic acid (JA) is well known to promote lateral root formation but the mechanisms by which JA signalling is integrated into the pathways responsible for lateral root formation, and how it interacts with auxin in this process remains poorly understood. Here, we report that the highly JA-responsive ethylene response factor 109 (ERF109) mediates cross-talk between JA signalling and auxin biosynthesis to regulate lateral root formation in Arabidopsis. erf109 mutants have fewer lateral roots under MeJA treatments compared with wild type whereas ERF109 overexpression causes a root phenotype that resembles those of auxin overproduction mutants. ERF109 binds directly to GCC-boxes in the promoters of ASA1 and YUC2, which encode two key enzymes in auxin biosynthesis. Thus, our study reveals a molecular mechanism for JA and auxin cross-talk during JA-induced lateral root formation.

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HDG11 upregulates cell-wall-loosening protein genes to promote root elongation in Arabidopsis

Abstract: SummaryEDT1/HGD11 coordinately upregulates gene families of cell-wall-loosening proteins to alter cell-wall extensibility and promote primary root elongation.

Cited by 83 publications

References 53 publications

Growing Out of Stress: The Role of Cell- and Organ-Scale Growth Control in Plant Water-Stress Responses

Growing Out of Stress: The Role of Cell- and Organ-Scale Growth Control in Plant Water-Stress Responses

Activated expression of AtEDT1/HDG11 promotes lateral root formation in Arabidopsis mutant edt1 by upregulating jasmonate biosynthesis

Arabidopsis ERF109 mediates cross-talk between jasmonic acid and auxin biosynthesis during lateral root formation

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