Mechanisms of signaling crosstalk between brassinosteroids and gibberellins

Li, Qianfeng; He, Jun

doi:10.4161/psb.24686

Cited by 60 publications

(28 citation statements)

References 82 publications

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“…Reductions in BES1 and BZR1 led to a semidwarf phenotype, and dominant mutations in BES1 and BZR1 resulted in distinct phenotypes in plants grown under light [10,21,25]. Finally, another study revealed that BZR1 synergized with gibberellin to regulate cell elongation [14,[26][27][28].…”

Section: Discussionmentioning

confidence: 96%

Genome-wide identification, characterization, and expression patterns of the BZR transcription factor family in sugar beet (Beta vulgaris L.)

Wang

Sun

et al. 2019

BMC Plant Biol

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Background: BRASSINAZOLE-RESISTANT (BZR) family genes encode plant-specific transcription factors (TFs) that participate in brassinosteroid signal transduction. BZR TFs have vital roles in plant growth, including cell elongation. However, little is known about BZR genes in sugar beet (Beta vulgaris L.). Results: Therefore, we performed a genome-wide investigation of BvBZR genes in sugar beet. Through an analysis of the BES1_N conserved domain, six BvBZR gene family members were identified in the sugar beet genome, which clustered into three subgroups according to a phylogenetic analysis. Each clade was well defined by the conserved motifs, implying that close genetic relationships could be identified among the members of each subfamily. According to chromosomal distribution mapping, 2, 1, 1, 1, and 1 genes were located on chromosomes 1, 4, 5, 6, and 8, respectively. The cis-acting elements related to taproot growth were randomly distributed in the promoter sequences of the BvBZR genes. Tissue-specific expression analyses indicated that all BvBZR genes were expressed in all three major tissue types (roots, stems, and leaves), with significantly higher expression in leaves. Subcellular localization analysis revealed that Bv1_fxre and Bv6_nyuw are localized in the nuclei, consistent with the prediction of Wolf PSORT. Conclusion: These findings offer a basis to predict the functions of BZR genes in sugar beet, and lay a foundation for further research of the biological functions of BZR genes in sugar beet.

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Section: Discussionmentioning

confidence: 96%

Genome-wide identification, characterization, and expression patterns of the BZR transcription factor family in sugar beet (Beta vulgaris L.)

Wang

Sun

et al. 2019

BMC Plant Biol

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“…As it can be seen from the Figure 3, hybrid ZP 434 had statistically significant differences at concentration of 5.2×10 -7 , 5.2×10 -9 and 5.2×10 -15 M, while hybrid ZP 704 had higher sensitivity for 24-EBL range, with more statistically significant differences, relative to 24-EBL concentrations. Seed germination and seedling elongation (and in the later stages of plant development) are directly dependent on gibberellins inducing activity of the enzyme α-amylase, one of the key enzymes in the process of degradation of the starch reserves during seed germination with which BRs act synergistically [16,17].…”

Section: Resultsmentioning

confidence: 99%

Influence of 24-epibrassinolide on seedling growth and distribution of mineral elements in two maize hybrids

Waisi

Petkovic

Nikolić

et al. 2017

Hem Ind

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In this study, influence of wide range of 24-epibrassinolide (24-EBL) on early growth potential of two maize hybrids (ZP 434 and ZP 704) was examined. Paper concerns germination, seedling biomass, important chlorophylls content, and redistribution of elements (heavy metals and microelements), in a seedlings of the maize hybrids, as influenced by different 24-EBL concentrations. It was found that hybrids react differently to exogenously applied hormone. The biggest differences between two examined maize hybrids considering the germination level were reached with the lowest values at 86% for ZP 704 and 72% for ZP 434, gained at the highest applied concentration of 24-EBL. Seedlings of hybrid ZP 434 reacted positively moderately in the case of shoot length and biomass under the influence of 24-EBL, but seedlings of hybrid ZP 704 had lower values of these parameters under the influence of the phytohormone. Chlorophyll a/b ratios showed that photosynthetic apparatus of seedlings of the hybrids is not active in this stage of development. It was established that 24-EBL affects seedling growth and re-allocation of naturally present mineral elements in early growth stages and that could be one of the reason for poorer growth of ZP 704 treated with various concentrations of 24-EBL, comparing to control. When applied in lower concentrations, 24-EBL is blocking toxic elements such as chromium and nickel to relocate to vital parts of plant, what was case in hybrid ZP704. In case of ZP 434, lower concentrations of 24-EBL are affecting re-allocation of Cu and Cr and these findings suggest that maize hybrid seedlings treated with lower concentrations of 24-EBL could survive and be successful in polluted areas. [Project of the Serbian Ministry of Education, Science and Technological Development, Grant no. TR31080]

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“…We consider direct crosstalk between the BR and GA signalling pathways. Besides shared gene expression, two main mechanisms for BR-GA crosstalk have been suggested: direct interaction at the level of transcription factors BZR and DELLA [31], and BZR-mediated biosynthesis of GA [56]. Here we derive a mathematical model to compare the behaviour of the system under the three different mechanisms of crosstalk (interaction between BZR and DELLA, BZR-mediated biosynthesis of GA, and a combination of both of them) and to analyse their effects on the BR and GA signalling processes.…”

Section: The Crosstalk Modelmentioning

confidence: 99%

Mathematical modelling and analysis of the brassinosteroid and gibberellin signalling pathways and their interactions

Allen

Ptashnyk

2017

Journal of Theoretical Biology

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The plant hormones brassinosteroid (BR) and gibberellin (GA) have important roles in a wide range of processes involved in plant growth and development. In this paper we derive and analyse new mathematical models for the BR signalling pathway and for the crosstalk between the BR and GA signalling pathways. To analyse the effects of spatial heterogeneity of the signalling processes, along with spatially-homogeneous ODE models we derive coupled PDE-ODE systems modelling the temporal and spatial dynamics of molecules involved in the signalling pathways. The values of the parameters in the model for the BR signalling pathway are determined using experimental data on the gene expression of BR biosynthetic enzymes. The stability of steady state solutions of our mathematical model, shown for a wide range of parameters, can be related to the BR homeostasis which is essential for proper function of plant cells. Solutions of the mathematical model for the BR signalling pathway can exhibit oscillatory behaviour only for relatively large values of parameters associated with transcription factor brassinazole-resistant1's (BZR) phosphorylation state, suggesting that this process may be important in governing the stability of signalling processes. Comparison between ODE and PDE-ODE models demonstrates distinct spatial distribution in the level of BR in the cell cytoplasm, however the spatial heterogeneity has significant effect on the dynamics of the averaged solutions only in the case when we have oscillations in solutions for at least one of the models, i.e. for possibly biologically not relevant parameter values. Our results for the crosstalk model suggest that the interaction between transcription factors BZR and DELLA exerts more influence on the dynamics of the signalling pathways than BZR-mediated biosynthesis of GA, suggesting that the interaction between transcription factors may constitute the principal mechanism of the crosstalk between the BR and GA signalling pathways. In general, perturbations in the GA signalling pathway have larger effects on the dynamics of components of the BR signalling pathway than perturbations in the BR signalling pathway on the dynamics of the GA pathway. The perturbation in the crosstalk mechanism also has a larger effect on the dynamics of the BR pathway than of the GA pathway. Large changes in the dynamics of the GA signalling processes can be observed only in the case where there are disturbances in both the BR signalling pathway and the crosstalk mechanism. Those results highlight the robustness of the GA signalling pathway.

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Mechanisms of signaling crosstalk between brassinosteroids and gibberellins

Cited by 60 publications

References 82 publications

Genome-wide identification, characterization, and expression patterns of the BZR transcription factor family in sugar beet (Beta vulgaris L.)

Genome-wide identification, characterization, and expression patterns of the BZR transcription factor family in sugar beet (Beta vulgaris L.)

Influence of 24-epibrassinolide on seedling growth and distribution of mineral elements in two maize hybrids

Mathematical modelling and analysis of the brassinosteroid and gibberellin signalling pathways and their interactions

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