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Azeez A, Zhao YC, Singh RK, Yordanov YS, Dash M, Miskolczi P, Stojkovič K, Strauss SH, Bhalerao RP, Busov VB. EARLY BUD-BREAK 1 and EARLY BUD-BREAK 3 control resumption of poplar growth after winter dormancy. Nat Commun 2021; 12:1123. [PMID: 33602938 PMCID: PMC7893051 DOI: 10.1038/s41467-021-21449-0] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2019] [Accepted: 01/22/2021] [Indexed: 01/31/2023] Open
Abstract
Bud-break is an economically and environmentally important process in trees and shrubs from boreal and temperate latitudes, but its molecular mechanisms are poorly understood. Here, we show that two previously reported transcription factors, EARLY BUD BREAK 1 (EBB1) and SHORT VEGETATIVE PHASE-Like (SVL) directly interact to control bud-break. EBB1 is a positive regulator of bud-break, whereas SVL is a negative regulator of bud-break. EBB1 directly and negatively regulates SVL expression. We further report the identification and characterization of the EBB3 gene. EBB3 is a temperature-responsive, epigenetically-regulated, positive regulator of bud-break that provides a direct link to activation of the cell cycle during bud-break. EBB3 is an AP2/ERF transcription factor that positively and directly regulates CYCLIND3.1 gene. Our results reveal the architecture of a putative regulatory module that links temperature-mediated control of bud-break with activation of cell cycle.
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Affiliation(s)
- Abdul Azeez
- College of Forest Resources and Environmental Science, Michigan Technological University, Houghton, MI, USA
| | - Yiru Chen Zhao
- College of Forest Resources and Environmental Science, Michigan Technological University, Houghton, MI, USA
| | - Rajesh Kumar Singh
- Umeå Plant Science Centre, Department of Forest Genetics and Plant Physiology, Swedish University of Agricultural Sciences, Umeå, Sweden
- Department of Biotechnology, CSIR-Institute of Himalayan Bioresource Technology, Palampur, Himachal Pradesh, India
| | - Yordan S Yordanov
- College of Forest Resources and Environmental Science, Michigan Technological University, Houghton, MI, USA
- Department of Biological Sciences, Eastern Illinois University, Charleston, IL, USA
| | - Madhumita Dash
- College of Forest Resources and Environmental Science, Michigan Technological University, Houghton, MI, USA
| | - Pal Miskolczi
- Umeå Plant Science Centre, Department of Forest Genetics and Plant Physiology, Swedish University of Agricultural Sciences, Umeå, Sweden
| | - Katja Stojkovič
- Umeå Plant Science Centre, Department of Forest Genetics and Plant Physiology, Swedish University of Agricultural Sciences, Umeå, Sweden
| | - Steve H Strauss
- Department of Forest Ecosystems and Society, Oregon State University, Corvallis, OR, USA
| | - Rishikesh P Bhalerao
- Umeå Plant Science Centre, Department of Forest Genetics and Plant Physiology, Swedish University of Agricultural Sciences, Umeå, Sweden.
| | - Victor B Busov
- College of Forest Resources and Environmental Science, Michigan Technological University, Houghton, MI, USA.
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Piya S, Liu J, Burch-Smith T, Baum TJ, Hewezi T. A role for Arabidopsis growth-regulating factors 1 and 3 in growth-stress antagonism. JOURNAL OF EXPERIMENTAL BOTANY 2020; 71:1402-1417. [PMID: 31701146 PMCID: PMC7031083 DOI: 10.1093/jxb/erz502] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2019] [Accepted: 11/05/2019] [Indexed: 05/21/2023]
Abstract
Growth-regulating factors (GRFs) belong to a small family of transcription factors that are highly conserved in plants. GRFs regulate many developmental processes and plant responses to biotic and abiotic stimuli. Despite the importance of GRFs, a detailed mechanistic understanding of their regulatory functions is still lacking. In this study, we used ChIP sequencing (ChIP-seq) to identify genome-wide binding sites of Arabidopsis GRF1 and GRF3, and correspondingly their direct downstream target genes. RNA-sequencing (RNA-seq) analysis revealed that GRF1 and GRF3 regulate the expression of a significant number of the identified direct targets. The target genes unveiled broad regulatory functions of GRF1 and GRF3 in plant growth and development, phytohormone biosynthesis and signaling, and the cell cycle. Our analyses also revealed that clock core genes and genes with stress- and defense-related functions are most predominant among the GRF1- and GRF3-bound targets, providing insights into a possible role for these transcription factors in mediating growth-defense antagonism and integrating environmental stimuli into developmental programs. Additionally, GRF1 and GRF3 target molecular nodes of growth-defense antagonism and modulate the levels of defense- and development-related hormones in opposite directions. Taken together, our results point to GRF1 and GRF3 as potential key determinants of plant fitness under stress conditions.
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Affiliation(s)
- Sarbottam Piya
- Department of Plant Sciences, University of Tennessee, Knoxville, TN, USA
| | - Jinyi Liu
- Department of Plant Sciences, University of Tennessee, Knoxville, TN, USA
- Present address: College of Horticulture, Nanjing Agricultural University, Nanjing, Jiangsu, 210095, China
| | - Tessa Burch-Smith
- Department of Biochemistry and Cellular and Molecular Biology, University of Tennessee, Knoxville, TN, USA
| | - Thomas J Baum
- Department of Plant Pathology and Microbiology, Iowa State University, Ames, IA, USA
| | - Tarek Hewezi
- Department of Plant Sciences, University of Tennessee, Knoxville, TN, USA
- Correspondence:
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The Heterologous Expression of a Chrysanthemum nankingense TCP Transcription Factor Blocks Cell Division in Yeast and Arabidopsis thaliana. Int J Mol Sci 2019; 20:ijms20194848. [PMID: 31569563 PMCID: PMC6801669 DOI: 10.3390/ijms20194848] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2019] [Revised: 09/23/2019] [Accepted: 09/23/2019] [Indexed: 01/09/2023] Open
Abstract
Both the presence of, and the important contribution to growth and development made by TCP transcription factors, have been established in various plant species. Here, a TCP4 homolog isolated from Chrysanthemum nankingense was shown to be more strongly transcribed in the diploid than in the autotetraploid form of the species. CnTCP4 was shown to encode a member of the class II TCP family and to be transcribed most strongly in the leaf and ligulate flowers. Its transcription was found to be substantially inhibited by spraying the plant with the synthetic cytokinin 6-benzylaminopurine. The transient expression of CnTCP4 in onion epidermal cells showed that its product localized to the nucleus, and a yeast one hybrid assay suggested that its product had transcriptional activation ability. The constitutive expression of CnTCP4 in fission yeast suppressed cell proliferation, inducing the formation of longer and a higher frequency of multinuclated cells. Its constitutive expression in Arabidopsis thaliana reduced the size of the leaves. The presence of the transgene altered the transcription of a number of cell division-related genes. A yeast one hybrid assay identified a second TCP gene (CnTCP2) able to interact with the CnTCP4 promoter. A transient expression experiment in Nicotiana benthamiana leaves showed that CnTCP2 was able to activate the CnTCP4 promoter. Like CnTCP4, CnTCP2 was shown to encode a member of the class II TCP family, to be transcribed most strongly in the leaf and ligulate flowers, and to be suppressed by exogenous 6-benzylaminopurine treatment. The CnTCP2 protein also localized to the nucleus, but had no transcriptional activation ability. Its constitutive expression in A. thaliana had similar phenotypic consequences to those induced by CnTCP4.
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Sarvepalli K, Nath U. CIN-TCP transcription factors: Transiting cell proliferation in plants. IUBMB Life 2018; 70:718-731. [PMID: 29934986 DOI: 10.1002/iub.1874] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2018] [Accepted: 04/23/2018] [Indexed: 12/27/2022]
Abstract
Leaves are the most conspicuous planar organs in plants, designed for efficient capture of sunlight and its conversion to energy that is channeled into sustaining the entire biosphere. How a few founder cells derived from the shoot apical meristem give rise to diverse leaf forms has interested naturalists and developmental biologists alike. At the heart of leaf morphogenesis lie two simple cellular processes, division and expansion, that are spatially and temporally segregated in a developing leaf. In leaves of dicot model species, cell division occurs predominantly at the base, concomitant with the expansion and differentiation of cells at the tip of the lamina that drives increase in leaf surface area. The timing of the transition from one cell fate (division) to the other (expansion) within a growing leaf lamina is a critical determinant of final leaf shape, size, complexity and flatness. The TCP proteins, unique to plant kingdom, are sequence-specific DNA-binding transcription factors that control several developmental and physiological traits. A sub-group of class II TCPs, called CINCINNATA-like TCPs (CIN-TCPs henceforth), are key regulators of the timing of the transition from division to expansion in dicot leaves. The current review highlights recent advances in our understanding of how the pattern of CIN-TCP activity is translated to the dynamic spatio-temporal control of cell-fate transition through the transactivation of cell-cycle regulators, growth-repressing microRNAs, and interactions with the chromatin remodeling machinery to modulate phytohormone responses. Unravelling how environmental inputs influence CIN-TCP-mediated growth control is a challenge for future studies. © 2018 IUBMB Life, 70(8):718-731, 2018.
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Affiliation(s)
- Kavitha Sarvepalli
- Department of Microbiology and Cell Biology, Indian Institute of Science, Bangalore, India
| | - Utpal Nath
- Department of Microbiology and Cell Biology, Indian Institute of Science, Bangalore, India
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Yang L, Liu H, Zhao J, Pan Y, Cheng S, Lietzow CD, Wen C, Zhang X, Weng Y. LITTLELEAF (LL) encodes a WD40 repeat domain-containing protein associated with organ size variation in cucumber. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2018; 95:834-847. [PMID: 29901823 DOI: 10.1111/tpj.13991] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/12/2016] [Revised: 06/04/2018] [Accepted: 06/06/2018] [Indexed: 05/03/2023]
Abstract
Plants employ tight genetic control to integrate intrinsic growth signals and environmental cues to enable organs to grow to a defined size. Many genes contributing to cell proliferation and/or cell expansion, and consequently organ size control, have been identified, but the regulatory pathways are poorly understood. Here we have characterized a cucumber littleleaf (ll) mutant which exhibits smaller organ sizes but more lateral branches than the wild type. The small organ size in ll was due to a reduction of both cell number and cell size. Quantitative trait locus (QTL) analyses revealed co-localization of major-effect QTLs for fruit size, fruit and seed weight, as well as number of lateral branches, with the LL locus indicating pleiotropic effects of the ll mutation. We demonstrate that LL is an ortholog of Arabidopsis STERILE APETALA (SAP) encoding a WD40 repeat domain-containing protein; the mutant protein differed from the wild type by a single amino acid substitution (W264G) in the second WD40 repeat. W264 was conserved in 34 vascular plant genomes examined. Phylogenetic analysis suggested that LL originated before the emergence of flowering plants but was lost in the grass genome lineage. The function of LL in organ size control was confirmed by its overexpression in transgenic cucumbers and ectopic expression in Arabidopsis. Transcriptome profiling in LL and ll bulks revealed a complex regulatory network for LL-mediated organ size variation that involves several known organ size regulators and associated pathways. The data support LL as an important player in organ size control and lateral branch development in cucumber.
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Affiliation(s)
- Luming Yang
- Horticulture Department, University of Wisconsin-Madison, Madison, WI, 53706, USA
- College of Horticulture, Henan Agricultural University, Zhengzhou, 450002, China
| | - Hanqiang Liu
- Horticulture Department, University of Wisconsin-Madison, Madison, WI, 53706, USA
| | - Jianyu Zhao
- Department of Vegetable Sciences, Beijing Key Laboratory of Growth and Developmental Regulation for Protected Vegetable Crops, China Agricultural University, Beijing, 100193, China
| | - Yupeng Pan
- Horticulture Department, University of Wisconsin-Madison, Madison, WI, 53706, USA
| | - Siyuan Cheng
- College of Horticulture, Henan Agricultural University, Zhengzhou, 450002, China
| | - Calvin D Lietzow
- Horticulture Department, University of Wisconsin-Madison, Madison, WI, 53706, USA
| | - Changlong Wen
- Horticulture Department, University of Wisconsin-Madison, Madison, WI, 53706, USA
- Beijing Vegetable Research Center and National Engineering Research Center for Vegetables, Beijing Academy of Agricultural and Forestry Sciences, Beijing, 100097, China
| | - Xiaolan Zhang
- Department of Vegetable Sciences, Beijing Key Laboratory of Growth and Developmental Regulation for Protected Vegetable Crops, China Agricultural University, Beijing, 100193, China
| | - Yiqun Weng
- Horticulture Department, University of Wisconsin-Madison, Madison, WI, 53706, USA
- USDA-ARS, Vegetable Crops Research Unit, 1575 Linden Drive, Madison, WI, 53706, USA
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Velappan Y, Signorelli S, Considine MJ. Cell cycle arrest in plants: what distinguishes quiescence, dormancy and differentiated G1? ANNALS OF BOTANY 2017; 120:495-509. [PMID: 28981580 PMCID: PMC5737280 DOI: 10.1093/aob/mcx082] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2017] [Revised: 03/29/2017] [Accepted: 06/06/2017] [Indexed: 05/21/2023]
Abstract
BACKGROUND Quiescence is a fundamental feature of plant life, which enables plasticity, renewal and fidelity of the somatic cell line. Cellular quiescence is defined by arrest in a particular phase of the cell cycle, typically G1 or G2; however, the regulation of quiescence and proliferation can also be considered across wider scales in space and time. As such, quiescence is a defining feature of plant development and phenology, from meristematic stem cell progenitors to terminally differentiated cells, as well as dormant or suppressed seeds and buds. While the physiology of each of these states differs considerably, each is referred to as 'cell cycle arrest' or 'G1 arrest'. SCOPE Here the physiology and molecular regulation of (1) meristematic quiescence, (2) dormancy and (3) terminal differentiation (cell cycle exit) are considered in order to determine whether and how the molecular decisions guiding these nuclear states are distinct. A brief overview of the canonical cell cycle regulators is provided, and the genetic and genomic, as well as physiological, evidence is considered regarding two primary questions: (1) Are the canonical cell cycle regulators superior or subordinate in the regulation of quiescence? (2) Are these three modes of quiescence governed by distinct molecular controls? CONCLUSION Meristematic quiescence, dormancy and terminal differentiation are each predominantly characterized by G1 arrest but regulated distinctly, at a level largely superior to the canonical cell cycle. Meristematic quiescence is intrinsically linked to non-cell-autonomous regulation of meristem cell identity, and particularly through the influence of ubiquitin-dependent proteolysis, in partnership with reactive oxygen species, abscisic acid and auxin. The regulation of terminal differentiation shares analogous features with meristematic quiescence, albeit with specific activators and a greater role for cytokinin signalling. Dormancy meanwhile appears to be regulated at the level of chromatin accessibility, by Polycomb group-type histone modifications of particular dormancy genes.
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Affiliation(s)
- Yazhini Velappan
- The UWA Institute of Agriculture, The University of Western Australia, Perth, WA 6009, Australia
- The School of Molecular Sciences, and The UWA School of Agriculture and Environment, The University of Western Australia, Perth, WA 6009, Australia
| | - Santiago Signorelli
- The UWA Institute of Agriculture, The University of Western Australia, Perth, WA 6009, Australia
- The School of Molecular Sciences, and The UWA School of Agriculture and Environment, The University of Western Australia, Perth, WA 6009, Australia
- Departamento de Biología Vegetal, Universidad de la República, Montevideo, 12900, Uruguay
| | - Michael J Considine
- The UWA Institute of Agriculture, The University of Western Australia, Perth, WA 6009, Australia
- The School of Molecular Sciences, and The UWA School of Agriculture and Environment, The University of Western Australia, Perth, WA 6009, Australia
- Department of Agriculture and Food Western Australia, South Perth, WA 6151, Australia
- Centre for Plant Sciences, School of Biology, University of Leeds, Leeds LS2 9JT, UK
- For correspondence. Email
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Xu P, Chen H, Ying L, Cai W. AtDOF5.4/OBP4, a DOF Transcription Factor Gene that Negatively Regulates Cell Cycle Progression and Cell Expansion in Arabidopsis thaliana. Sci Rep 2016; 6:27705. [PMID: 27297966 PMCID: PMC4906354 DOI: 10.1038/srep27705] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2016] [Accepted: 05/24/2016] [Indexed: 01/01/2023] Open
Abstract
In contrast to animals, plant development involves continuous organ formation, which requires strict regulation of cell proliferation. The core cell cycle machinery is conserved across plants and animals, but plants have developed new mechanisms that precisely regulate cell proliferation in response to internal and external stimuli. Here, we report that the DOF transcription factor OBP4 negatively regulates cell proliferation and expansion. OBP4 is a nuclear protein. Constitutive and inducible overexpression of OBP4 reduced the cell size and number, resulting in dwarf plants. Inducible overexpression of OBP4 in Arabidopsis also promoted early endocycle onset and inhibited cell expansion, while inducible overexpression of OBP4 fused to the VP16 activation domain in Arabidopsis delayed endocycle onset and promoted plant growth. Furthermore, gene expression analysis showed that cell cycle regulators and cell wall expansion factors were largely down-regulated in the OBP4 overexpression lines. Short-term inducible analysis coupled with in vivo ChIP assays indicated that OBP4 targets the CyclinB1;1, CDKB1;1 and XTH genes. These results strongly suggest that OBP4 is a negative regulator of cell cycle progression and cell growth. These findings increase our understanding of the transcriptional regulation of the cell cycle in plants.
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Affiliation(s)
- Peipei Xu
- Institute of Plant Physiology and Ecology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, 300 Fenglin Rd, Shanghai 200032, China
| | - Haiying Chen
- Institute of Plant Physiology and Ecology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, 300 Fenglin Rd, Shanghai 200032, China
| | - Lu Ying
- Institute of Plant Physiology and Ecology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, 300 Fenglin Rd, Shanghai 200032, China
| | - Weiming Cai
- Institute of Plant Physiology and Ecology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, 300 Fenglin Rd, Shanghai 200032, China
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Mattiello L, Riaño-Pachón DM, Martins MCM, da Cruz LP, Bassi D, Marchiori PER, Ribeiro RV, Labate MTV, Labate CA, Menossi M. Physiological and transcriptional analyses of developmental stages along sugarcane leaf. BMC PLANT BIOLOGY 2015; 15:300. [PMID: 26714767 PMCID: PMC4696237 DOI: 10.1186/s12870-015-0694-z] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2015] [Accepted: 12/17/2015] [Indexed: 05/18/2023]
Abstract
BACKGROUND Sugarcane is one of the major crops worldwide. It is cultivated in over 100 countries on 22 million ha. The complex genetic architecture and the lack of a complete genomic sequence in sugarcane hamper the adoption of molecular approaches to study its physiology and to develop new varieties. Investments on the development of new sugarcane varieties have been made to maximize sucrose yield, a trait dependent on photosynthetic capacity. However, detailed studies on sugarcane leaves are scarce. In this work, we report the first molecular and physiological characterization of events taking place along a leaf developmental gradient in sugarcane. RESULTS Photosynthetic response to CO2 indicated divergence in photosynthetic capacity based on PEPcase activity, corroborated by activity quantification (both in vivo and in vitro) and distinct levels of carbon discrimination on different segments along leaf length. Additionally, leaf segments had contrasting amount of chlorophyll, nitrogen and sugars. RNA-Seq data indicated a plethora of biochemical pathways differentially expressed along the leaf. Some transcription factors families were enriched on each segment and their putative functions corroborate with the distinct developmental stages. Several genes with higher expression in the middle segment, the one with the highest photosynthetic rates, were identified and their role in sugarcane productivity is discussed. Interestingly, sugarcane leaf segments had a different transcriptional behavior compared to previously published data from maize. CONCLUSION This is the first report of leaf developmental analysis in sugarcane. Our data on sugarcane is another source of information for further studies aiming to understand and/or improve C4 photosynthesis. The segments used in this work were distinct in their physiological status allowing deeper molecular analysis. Although limited in some aspects, the comparison to maize indicates that all data acquired on one C4 species cannot always be easily extrapolated to other species. However, our data indicates that some transcriptional factors were segment-specific and the sugarcane leaf undergoes through the process of suberizarion, photosynthesis establishment and senescence.
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Affiliation(s)
- Lucia Mattiello
- Laboratório Nacional de Ciência e Tecnologia do Bioetanol (CTBE), Centro Nacional de Pesquisa em Energia e Materiais (CNPEM), Caixa Postal 6192, 13083-970, Campinas, SP, Brazil.
- Laboratório de Genoma Funcional, Instituto de Biologia, Universidade Estadual de Campinas Campinas, Caixa Postal 6109, Campinas, 13083-862, SP, Brazil.
| | - Diego Mauricio Riaño-Pachón
- Laboratório Nacional de Ciência e Tecnologia do Bioetanol (CTBE), Centro Nacional de Pesquisa em Energia e Materiais (CNPEM), Caixa Postal 6192, 13083-970, Campinas, SP, Brazil.
| | - Marina Camara Mattos Martins
- Laboratório Nacional de Ciência e Tecnologia do Bioetanol (CTBE), Centro Nacional de Pesquisa em Energia e Materiais (CNPEM), Caixa Postal 6192, 13083-970, Campinas, SP, Brazil.
| | - Larissa Prado da Cruz
- Laboratório Nacional de Ciência e Tecnologia do Bioetanol (CTBE), Centro Nacional de Pesquisa em Energia e Materiais (CNPEM), Caixa Postal 6192, 13083-970, Campinas, SP, Brazil.
| | - Denis Bassi
- Laboratório Nacional de Ciência e Tecnologia do Bioetanol (CTBE), Centro Nacional de Pesquisa em Energia e Materiais (CNPEM), Caixa Postal 6192, 13083-970, Campinas, SP, Brazil.
| | - Paulo Eduardo Ribeiro Marchiori
- Laboratório de Fisiologia de Plantas "Coaracy M. Franco", Centro de Pesquisa e Desenvolvimento em Ecofisiologia e Biofísica, Instituto Agronômico, Caixa Postal 28, Campinas, 13020-902, SP, Brazil.
| | - Rafael Vasconcelos Ribeiro
- Departamento de Biologia de Plantas, Universidade Estadual de Campinas, Caixa Postal 6109, Campinas, 13083-970, SP, Brazil.
| | - Mônica T Veneziano Labate
- Laboratório Max Feffer de Genética de Plantas, Departamento de Genética, Universidade de São Paulo, Caixa Postal 83, Piracicaba, 13400-970, SP, Brazil.
| | - Carlos Alberto Labate
- Laboratório Max Feffer de Genética de Plantas, Departamento de Genética, Universidade de São Paulo, Caixa Postal 83, Piracicaba, 13400-970, SP, Brazil.
| | - Marcelo Menossi
- Laboratório de Genoma Funcional, Instituto de Biologia, Universidade Estadual de Campinas Campinas, Caixa Postal 6109, Campinas, 13083-862, SP, Brazil.
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Wang X, Gao J, Zhu Z, Dong X, Wang X, Ren G, Zhou X, Kuai B. TCP transcription factors are critical for the coordinated regulation of isochorismate synthase 1 expression in Arabidopsis thaliana. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2015; 82:151-62. [PMID: 25702611 DOI: 10.1111/tpj.12803] [Citation(s) in RCA: 82] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2014] [Revised: 02/10/2015] [Accepted: 02/11/2015] [Indexed: 05/10/2023]
Abstract
Salicylic acid (SA) plays an important role in various aspects of plant development and responses to stresses. To elucidate the sophisticated regulatory mechanism of SA synthesis and signaling, we used a yeast one-hybrid system to screen for regulators of isochorismate synthase 1 (ICS1), a gene encoding the key enzyme in SA biosynthesis in Arabidopsis thaliana. A TCP family transcription factor AtTCP8 was initially identified as a candidate regulator of ICS1. The regulation of ICS1 by TCP proteins is supported by the presence of a typical TCP binding site in the ICS1 promoter. The binding of TCP8 to this site was confirmed by in vitro and in vivo assays. Expression patterns of TCP8 and its corresponding gene TCP9 largely overlapped with ICS1 under pathogen attack. A significant reduction in the expression of ICS1 during immune responses was observed in the tcp8 tcp9 double mutant. We also detected strong interactions between TCP8 and SAR deficient 1 (SARD1), WRKY family transcription factor 28 (WRKY28), NAC (NAM/ATAF1,ATAF2/CUC2) family transcription factor 019 (NAC019), as well as among TCP8, TCP9 and TCP20, suggesting a complex coordinated regulatory mechanism underlying ICS1 expression. Our results collectively demonstrate that TCP proteins are involved in the orchestrated regulation of ICS1 expression, with TCP8 and TCP9 being verified as major representatives.
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Affiliation(s)
- Xiaoyan Wang
- State Key Laboratory of Genetic Engineering, Fudan Institute of Plant Biology, School of Life Sciences, Fudan University, Shanghai, 200438, China
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10
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Valsecchi I, Guittard-Crilat E, Maldiney R, Habricot Y, Lignon S, Lebrun R, Miginiac E, Ruelland E, Jeannette E, Lebreton S. The intrinsically disordered C-terminal region of Arabidopsis thaliana TCP8 transcription factor acts both as a transactivation and self-assembly domain. MOLECULAR BIOSYSTEMS 2014; 9:2282-95. [PMID: 23760157 DOI: 10.1039/c3mb70128j] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
TCPs are plant specific transcription factors with non-canonical basic helix-loop-helix domains. While Arabidopsis thaliana has 24 TCPs involved in cell proliferation and differentiation, their mode of action has not been fully elucidated. Using bioinformatic tools, we demonstrate that TCP transcription factors belong to the intrinsically disordered proteins (IDP) family and that disorder is higher in class I TCPs than in class II TCPs. In particular, using bioinformatic and biochemical approaches, we have characterized TCP8, a class I TCP. TCP8 exhibits three intrinsically disordered regions (IDR) made of more than 50 consecutive residues, in which phosphorylable Ser residues are mainly clustered. Phosphorylation of Ser-211 that belongs to the central IDR was confirmed by mass spectrometry. Yeast two-hybrid assays also showed that the C-terminal IDR corresponds to a transactivation domain. Moreover, biochemical experiments demonstrated that TCP8 tends to oligomerize in dimers, trimers and higher-order multimers. Bimolecular fluorescence complementation (BiFC) experiments carried out on a truncated form of TCP8 lacking the C-terminal IDR indicated that it is effectively required for the pronounced self-assembly of TCP8. These data were reinforced by the prediction of a coiled coil domain in this IDR. The C-terminal IDR acts thus as an oligomerization domain and also a transactivation domain. Moreover, many Molecular Recognition Features (MoRFs) were predicted, indicating that TCP8 could interact with several partners to fulfill a fine regulation of transcription in response to various stimuli.
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Affiliation(s)
- Isabel Valsecchi
- Université Pierre et Marie Curie, Laboratoire de Physiologie Cellulaire et Moléculaire des Plantes, Unité de Recherche 5 - Equipe d'Accueil 7180 du Centre National de la Recherche Scientifique, case 156, 4 place Jussieu, 75252 Paris cedex 05, France
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11
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Mao Y, Wu F, Yu X, Bai J, Zhong W, He Y. MicroRNA319a-targeted Brassica rapa ssp. pekinensis TCP genes modulate head shape in chinese cabbage by differential cell division arrest in leaf regions. PLANT PHYSIOLOGY 2014; 164:710-20. [PMID: 24351684 PMCID: PMC3912100 DOI: 10.1104/pp.113.228007] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2013] [Accepted: 12/17/2013] [Indexed: 05/18/2023]
Abstract
Leafy heads of cabbage (Brassica oleracea), Chinese cabbage (Brassica rapa), and lettuce (Lactuca sativa) are composed of extremely incurved leaves. The shape of these heads often dictates the quality, and thus the commercial value, of these crops. Using quantitative trait locus mapping of head traits within a population of 150 recombinant inbred lines of Chinese cabbage, we investigated the relationship between expression levels of microRNA-targeted Brassica rapa ssp. pekinensis TEOSINTE BRANCHED1, cycloidea, and PCF transcription factor4 (BrpTCP4) genes and head shape. Here, we demonstrate that a cylindrical head shape is associated with relatively low BrpTCP4-1 expression, whereas a round head shape is associated with high BrpTCP4-1 expression. In the round-type Chinese cabbage, microRNA319 (miR319) accumulation and BrpTCP4-1 expression decrease from the apical to central regions of leaves. Overexpression of BrpMIR319a2 reduced the expression levels of BrpTCP4 and resulted in an even distribution of BrpTCP4 transcripts within all leaf regions. Changes in temporal and spatial patterns of BrpTCP4 expression appear to be associated with excess growth of both apical and interveinal regions, straightened leaf tips, and a transition from the round to the cylindrical head shape. These results suggest that the miR319a-targeted BrpTCP gene regulates the round shape of leafy heads via differential cell division arrest in leaf regions. Therefore, the manipulation of miR319a and BrpTCP4 genes is a potentially important tool for use in the genetic improvement of head shape in these crops.
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Mehrnia M, Balazadeh S, Zanor MI, Mueller-Roeber B. EBE, an AP2/ERF transcription factor highly expressed in proliferating cells, affects shoot architecture in Arabidopsis. PLANT PHYSIOLOGY 2013; 162:842-57. [PMID: 23616605 PMCID: PMC3668074 DOI: 10.1104/pp.113.214049] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
We report about ERF BUD ENHANCER (EBE; At5g61890), a transcription factor that affects cell proliferation as well as axillary bud outgrowth and shoot branching in Arabidopsis (Arabidopsis thaliana). EBE encodes a member of the APETALA2/ETHYLENE RESPONSE FACTOR (AP2/ERF) transcription factor superfamily; the gene is strongly expressed in proliferating cells and is rapidly and transiently up-regulated in axillary meristems upon main stem decapitation. Overexpression of EBE promotes cell proliferation in growing calli, while the opposite is observed in EBE-RNAi lines. EBE overexpression also stimulates axillary bud formation and outgrowth, while repressing it results in inhibition of bud growth. Global transcriptome analysis of estradiol-inducible EBE overexpression lines revealed 48 EBE early-responsive genes, of which 14 were up-regulated and 34 were down-regulated. EBE activates several genes involved in cell cycle regulation and dormancy breaking, including D-type cyclin CYCD3;3, transcription regulator DPa, and BRCA1-ASSOCIATED RING DOMAIN1. Among the down-regulated genes were DORMANCY-ASSOCIATED PROTEIN1 (AtDRM1), AtDRM1 homolog, MEDIATOR OF ABA-REGULATED DORMANCY1, and ZINC FINGER HOMEODOMAIN5. Our data indicate that the effect of EBE on shoot branching likely results from an activation of genes involved in cell cycle regulation and dormancy breaking.
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13
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González-Grandío E, Poza-Carrión C, Sorzano COS, Cubas P. BRANCHED1 promotes axillary bud dormancy in response to shade in Arabidopsis. THE PLANT CELL 2013; 25:834-50. [PMID: 23524661 PMCID: PMC3634692 DOI: 10.1105/tpc.112.108480] [Citation(s) in RCA: 154] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2012] [Revised: 02/18/2013] [Accepted: 03/04/2013] [Indexed: 05/18/2023]
Abstract
Plants interpret a decrease in the red to far-red light ratio (R:FR) as a sign of impending shading by neighboring vegetation. This triggers a set of developmental responses known as shade avoidance syndrome. One of these responses is reduced branching through suppression of axillary bud outgrowth. The Arabidopsis thaliana gene BRANCHED1 (BRC1), expressed in axillary buds, is required for branch suppression in response to shade. Unlike wild-type plants, brc1 mutants develop several branches after a shade treatment. BRC1 transcription is positively regulated 4 h after exposure to low R:FR. Consistently, BRC1 is negatively regulated by phytochrome B. Transcriptional profiling of wild-type and brc1 buds of plants treated with simulated shade has revealed groups of genes whose mRNA levels are dependent on BRC1, among them a set of upregulated abscisic acid response genes and two networks of cell cycle- and ribosome-related downregulated genes. The downregulated genes have promoters enriched in TEOSINTE BRANCHED1, CYCLOIDEA, and PCF (TCP) binding sites, suggesting that they could be transcriptionally regulated by TCP factors. Some of these genes respond to BRC1 in seedlings and buds, supporting their close relationship with BRC1 activity. This response may allow the rapid adaptation of plants to fluctuations in the ratio of R:FR light.
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Affiliation(s)
- Eduardo González-Grandío
- Departamento de Genética Molecular de Plantas, Centro Nacional de Biotecnología/Consejo Superior de Investigaciones Cientificas, Campus Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - César Poza-Carrión
- Departamento de Genética Molecular de Plantas, Centro Nacional de Biotecnología/Consejo Superior de Investigaciones Cientificas, Campus Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - Carlos Oscar S. Sorzano
- Departamento de Estructura de Macromoléculas, Centro Nacional de Biotecnología/Consejo Superior de Investigaciones Cientificas, Campus Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - Pilar Cubas
- Departamento de Genética Molecular de Plantas, Centro Nacional de Biotecnología/Consejo Superior de Investigaciones Cientificas, Campus Universidad Autónoma de Madrid, 28049 Madrid, Spain
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14
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Windram O, Madhou P, McHattie S, Hill C, Hickman R, Cooke E, Jenkins DJ, Penfold CA, Baxter L, Breeze E, Kiddle SJ, Rhodes J, Atwell S, Kliebenstein DJ, Kim YS, Stegle O, Borgwardt K, Zhang C, Tabrett A, Legaie R, Moore J, Finkenstadt B, Wild DL, Mead A, Rand D, Beynon J, Ott S, Buchanan-Wollaston V, Denby KJ. Arabidopsis defense against Botrytis cinerea: chronology and regulation deciphered by high-resolution temporal transcriptomic analysis. THE PLANT CELL 2012; 24:3530-57. [PMID: 23023172 PMCID: PMC3480286 DOI: 10.1105/tpc.112.102046] [Citation(s) in RCA: 232] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2012] [Revised: 08/14/2012] [Accepted: 09/07/2012] [Indexed: 05/18/2023]
Abstract
Transcriptional reprogramming forms a major part of a plant's response to pathogen infection. Many individual components and pathways operating during plant defense have been identified, but our knowledge of how these different components interact is still rudimentary. We generated a high-resolution time series of gene expression profiles from a single Arabidopsis thaliana leaf during infection by the necrotrophic fungal pathogen Botrytis cinerea. Approximately one-third of the Arabidopsis genome is differentially expressed during the first 48 h after infection, with the majority of changes in gene expression occurring before significant lesion development. We used computational tools to obtain a detailed chronology of the defense response against B. cinerea, highlighting the times at which signaling and metabolic processes change, and identify transcription factor families operating at different times after infection. Motif enrichment and network inference predicted regulatory interactions, and testing of one such prediction identified a role for TGA3 in defense against necrotrophic pathogens. These data provide an unprecedented level of detail about transcriptional changes during a defense response and are suited to systems biology analyses to generate predictive models of the gene regulatory networks mediating the Arabidopsis response to B. cinerea.
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Affiliation(s)
- Oliver Windram
- School of Life Sciences, University of Warwick, Coventry CV4 7AL, United Kingdom
| | | | - Stuart McHattie
- Warwick Systems Biology Centre, University of Warwick, Coventry CV4 7AL, United Kingdom
| | - Claire Hill
- School of Life Sciences, University of Warwick, Coventry CV4 7AL, United Kingdom
| | - Richard Hickman
- Warwick Systems Biology Centre, University of Warwick, Coventry CV4 7AL, United Kingdom
| | - Emma Cooke
- Molecular Organization and Assembly of Cells Doctoral Training Centre, University of Warwick, Coventry CV4 7AL, United Kingdom
| | - Dafyd J. Jenkins
- Warwick Systems Biology Centre, University of Warwick, Coventry CV4 7AL, United Kingdom
| | | | - Laura Baxter
- Warwick Systems Biology Centre, University of Warwick, Coventry CV4 7AL, United Kingdom
| | - Emily Breeze
- School of Life Sciences, University of Warwick, Coventry CV4 7AL, United Kingdom
- Warwick Systems Biology Centre, University of Warwick, Coventry CV4 7AL, United Kingdom
| | - Steven J. Kiddle
- Warwick Systems Biology Centre, University of Warwick, Coventry CV4 7AL, United Kingdom
| | - Johanna Rhodes
- School of Life Sciences, University of Warwick, Coventry CV4 7AL, United Kingdom
| | - Susanna Atwell
- Department of Plant Sciences, University of California, Davis, California 95616
| | | | - Youn-sung Kim
- School of Life Sciences, University of Warwick, Coventry CV4 7AL, United Kingdom
| | - Oliver Stegle
- Max Planck Institute for Developmental Biology and Max Planck Institute for Intelligent Systems, 72076 Tuebingen, Germany
| | - Karsten Borgwardt
- Max Planck Institute for Developmental Biology and Max Planck Institute for Intelligent Systems, 72076 Tuebingen, Germany
- Zentrum für Bioinformatik, Eberhard Karls Universität, 72076 Tuebingen, Germany
| | - Cunjin Zhang
- School of Life Sciences, University of Warwick, Coventry CV4 7AL, United Kingdom
| | - Alex Tabrett
- School of Life Sciences, University of Warwick, Coventry CV4 7AL, United Kingdom
| | - Roxane Legaie
- Warwick Systems Biology Centre, University of Warwick, Coventry CV4 7AL, United Kingdom
| | - Jonathan Moore
- Warwick Systems Biology Centre, University of Warwick, Coventry CV4 7AL, United Kingdom
| | - Bärbel Finkenstadt
- Department of Statistics, University of Warwick, Coventry CV4 7AL, United Kingdom
| | - David L. Wild
- Warwick Systems Biology Centre, University of Warwick, Coventry CV4 7AL, United Kingdom
| | - Andrew Mead
- School of Life Sciences, University of Warwick, Coventry CV4 7AL, United Kingdom
| | - David Rand
- Warwick Systems Biology Centre, University of Warwick, Coventry CV4 7AL, United Kingdom
| | - Jim Beynon
- School of Life Sciences, University of Warwick, Coventry CV4 7AL, United Kingdom
- Warwick Systems Biology Centre, University of Warwick, Coventry CV4 7AL, United Kingdom
| | - Sascha Ott
- Warwick Systems Biology Centre, University of Warwick, Coventry CV4 7AL, United Kingdom
| | - Vicky Buchanan-Wollaston
- School of Life Sciences, University of Warwick, Coventry CV4 7AL, United Kingdom
- Warwick Systems Biology Centre, University of Warwick, Coventry CV4 7AL, United Kingdom
| | - Katherine J. Denby
- School of Life Sciences, University of Warwick, Coventry CV4 7AL, United Kingdom
- Warwick Systems Biology Centre, University of Warwick, Coventry CV4 7AL, United Kingdom
- Address correspondence to
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15
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Chang YM, Liu WY, Shih ACC, Shen MN, Lu CH, Lu MYJ, Yang HW, Wang TY, Chen SCC, Chen SM, Li WH, Ku MS. Characterizing regulatory and functional differentiation between maize mesophyll and bundle sheath cells by transcriptomic analysis. PLANT PHYSIOLOGY 2012; 160:165-77. [PMID: 22829318 PMCID: PMC3440195 DOI: 10.1104/pp.112.203810] [Citation(s) in RCA: 118] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2012] [Accepted: 07/23/2012] [Indexed: 05/18/2023]
Abstract
To study the regulatory and functional differentiation between the mesophyll (M) and bundle sheath (BS) cells of maize (Zea mays), we isolated large quantities of highly homogeneous M and BS cells from newly matured second leaves for transcriptome profiling by RNA sequencing. A total of 52,421 annotated genes with at least one read were found in the two transcriptomes. Defining a gene with more than one read per kilobase per million mapped reads as expressed, we identified 18,482 expressed genes; 14,972 were expressed in M cells, including 53 M-enriched transcription factor (TF) genes, whereas 17,269 were expressed in BS cells, including 214 BS-enriched TF genes. Interestingly, many TF gene families show a conspicuous BS preference in expression. Pathway analyses reveal differentiation between the two cell types in various functional categories, with the M cells playing more important roles in light reaction, protein synthesis and folding, tetrapyrrole synthesis, and RNA binding, while the BS cells specialize in transport, signaling, protein degradation and posttranslational modification, major carbon, hydrogen, and oxygen metabolism, cell division and organization, and development. Genes coding for several transporters involved in the shuttle of C(4) metabolites and BS cell wall development have been identified, to our knowledge, for the first time. This comprehensive data set will be useful for studying M/BS differentiation in regulation and function.
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Affiliation(s)
- Yao-Ming Chang
- Biodiversity Research Center (Y.-M.C., W.-Y.L., M.-N.S., M.-Y.J.L., T.-Y.W., W.-H.L.), Genomics Research Center (Y.-M.C., W.-Y.L., S.M.C., W.-H.L.), and Institute of Information Science (A.C.-C.S., C.-H.L.), Academia Sinica, Taipei, Taiwan 115; Institute of Bioagricultural Science, National Chiayi University, Chiayi, Taiwan 600 (H.-W.Y., M.S.B.K.); Department of Ecology and Evolution, University of Chicago, Chicago, Illinois 60637 (S.C.-C.C., W.-H.L.); and School of Biological Sciences, Washington State University, Pullman, Washington 99164–4238 (M.S.B.K.)
| | - Wen-Yu Liu
- Biodiversity Research Center (Y.-M.C., W.-Y.L., M.-N.S., M.-Y.J.L., T.-Y.W., W.-H.L.), Genomics Research Center (Y.-M.C., W.-Y.L., S.M.C., W.-H.L.), and Institute of Information Science (A.C.-C.S., C.-H.L.), Academia Sinica, Taipei, Taiwan 115; Institute of Bioagricultural Science, National Chiayi University, Chiayi, Taiwan 600 (H.-W.Y., M.S.B.K.); Department of Ecology and Evolution, University of Chicago, Chicago, Illinois 60637 (S.C.-C.C., W.-H.L.); and School of Biological Sciences, Washington State University, Pullman, Washington 99164–4238 (M.S.B.K.)
| | - Arthur Chun-Chieh Shih
- Biodiversity Research Center (Y.-M.C., W.-Y.L., M.-N.S., M.-Y.J.L., T.-Y.W., W.-H.L.), Genomics Research Center (Y.-M.C., W.-Y.L., S.M.C., W.-H.L.), and Institute of Information Science (A.C.-C.S., C.-H.L.), Academia Sinica, Taipei, Taiwan 115; Institute of Bioagricultural Science, National Chiayi University, Chiayi, Taiwan 600 (H.-W.Y., M.S.B.K.); Department of Ecology and Evolution, University of Chicago, Chicago, Illinois 60637 (S.C.-C.C., W.-H.L.); and School of Biological Sciences, Washington State University, Pullman, Washington 99164–4238 (M.S.B.K.)
| | - Meng-Ni Shen
- Biodiversity Research Center (Y.-M.C., W.-Y.L., M.-N.S., M.-Y.J.L., T.-Y.W., W.-H.L.), Genomics Research Center (Y.-M.C., W.-Y.L., S.M.C., W.-H.L.), and Institute of Information Science (A.C.-C.S., C.-H.L.), Academia Sinica, Taipei, Taiwan 115; Institute of Bioagricultural Science, National Chiayi University, Chiayi, Taiwan 600 (H.-W.Y., M.S.B.K.); Department of Ecology and Evolution, University of Chicago, Chicago, Illinois 60637 (S.C.-C.C., W.-H.L.); and School of Biological Sciences, Washington State University, Pullman, Washington 99164–4238 (M.S.B.K.)
| | - Chen-Hua Lu
- Biodiversity Research Center (Y.-M.C., W.-Y.L., M.-N.S., M.-Y.J.L., T.-Y.W., W.-H.L.), Genomics Research Center (Y.-M.C., W.-Y.L., S.M.C., W.-H.L.), and Institute of Information Science (A.C.-C.S., C.-H.L.), Academia Sinica, Taipei, Taiwan 115; Institute of Bioagricultural Science, National Chiayi University, Chiayi, Taiwan 600 (H.-W.Y., M.S.B.K.); Department of Ecology and Evolution, University of Chicago, Chicago, Illinois 60637 (S.C.-C.C., W.-H.L.); and School of Biological Sciences, Washington State University, Pullman, Washington 99164–4238 (M.S.B.K.)
| | - Mei-Yeh Jade Lu
- Biodiversity Research Center (Y.-M.C., W.-Y.L., M.-N.S., M.-Y.J.L., T.-Y.W., W.-H.L.), Genomics Research Center (Y.-M.C., W.-Y.L., S.M.C., W.-H.L.), and Institute of Information Science (A.C.-C.S., C.-H.L.), Academia Sinica, Taipei, Taiwan 115; Institute of Bioagricultural Science, National Chiayi University, Chiayi, Taiwan 600 (H.-W.Y., M.S.B.K.); Department of Ecology and Evolution, University of Chicago, Chicago, Illinois 60637 (S.C.-C.C., W.-H.L.); and School of Biological Sciences, Washington State University, Pullman, Washington 99164–4238 (M.S.B.K.)
| | - Hui-Wen Yang
- Biodiversity Research Center (Y.-M.C., W.-Y.L., M.-N.S., M.-Y.J.L., T.-Y.W., W.-H.L.), Genomics Research Center (Y.-M.C., W.-Y.L., S.M.C., W.-H.L.), and Institute of Information Science (A.C.-C.S., C.-H.L.), Academia Sinica, Taipei, Taiwan 115; Institute of Bioagricultural Science, National Chiayi University, Chiayi, Taiwan 600 (H.-W.Y., M.S.B.K.); Department of Ecology and Evolution, University of Chicago, Chicago, Illinois 60637 (S.C.-C.C., W.-H.L.); and School of Biological Sciences, Washington State University, Pullman, Washington 99164–4238 (M.S.B.K.)
| | - Tzi-Yuan Wang
- Biodiversity Research Center (Y.-M.C., W.-Y.L., M.-N.S., M.-Y.J.L., T.-Y.W., W.-H.L.), Genomics Research Center (Y.-M.C., W.-Y.L., S.M.C., W.-H.L.), and Institute of Information Science (A.C.-C.S., C.-H.L.), Academia Sinica, Taipei, Taiwan 115; Institute of Bioagricultural Science, National Chiayi University, Chiayi, Taiwan 600 (H.-W.Y., M.S.B.K.); Department of Ecology and Evolution, University of Chicago, Chicago, Illinois 60637 (S.C.-C.C., W.-H.L.); and School of Biological Sciences, Washington State University, Pullman, Washington 99164–4238 (M.S.B.K.)
| | - Sean C.-C. Chen
- Biodiversity Research Center (Y.-M.C., W.-Y.L., M.-N.S., M.-Y.J.L., T.-Y.W., W.-H.L.), Genomics Research Center (Y.-M.C., W.-Y.L., S.M.C., W.-H.L.), and Institute of Information Science (A.C.-C.S., C.-H.L.), Academia Sinica, Taipei, Taiwan 115; Institute of Bioagricultural Science, National Chiayi University, Chiayi, Taiwan 600 (H.-W.Y., M.S.B.K.); Department of Ecology and Evolution, University of Chicago, Chicago, Illinois 60637 (S.C.-C.C., W.-H.L.); and School of Biological Sciences, Washington State University, Pullman, Washington 99164–4238 (M.S.B.K.)
| | - Stella Maris Chen
- Biodiversity Research Center (Y.-M.C., W.-Y.L., M.-N.S., M.-Y.J.L., T.-Y.W., W.-H.L.), Genomics Research Center (Y.-M.C., W.-Y.L., S.M.C., W.-H.L.), and Institute of Information Science (A.C.-C.S., C.-H.L.), Academia Sinica, Taipei, Taiwan 115; Institute of Bioagricultural Science, National Chiayi University, Chiayi, Taiwan 600 (H.-W.Y., M.S.B.K.); Department of Ecology and Evolution, University of Chicago, Chicago, Illinois 60637 (S.C.-C.C., W.-H.L.); and School of Biological Sciences, Washington State University, Pullman, Washington 99164–4238 (M.S.B.K.)
| | - Wen-Hsiung Li
- Biodiversity Research Center (Y.-M.C., W.-Y.L., M.-N.S., M.-Y.J.L., T.-Y.W., W.-H.L.), Genomics Research Center (Y.-M.C., W.-Y.L., S.M.C., W.-H.L.), and Institute of Information Science (A.C.-C.S., C.-H.L.), Academia Sinica, Taipei, Taiwan 115; Institute of Bioagricultural Science, National Chiayi University, Chiayi, Taiwan 600 (H.-W.Y., M.S.B.K.); Department of Ecology and Evolution, University of Chicago, Chicago, Illinois 60637 (S.C.-C.C., W.-H.L.); and School of Biological Sciences, Washington State University, Pullman, Washington 99164–4238 (M.S.B.K.)
| | - Maurice S.B. Ku
- Biodiversity Research Center (Y.-M.C., W.-Y.L., M.-N.S., M.-Y.J.L., T.-Y.W., W.-H.L.), Genomics Research Center (Y.-M.C., W.-Y.L., S.M.C., W.-H.L.), and Institute of Information Science (A.C.-C.S., C.-H.L.), Academia Sinica, Taipei, Taiwan 115; Institute of Bioagricultural Science, National Chiayi University, Chiayi, Taiwan 600 (H.-W.Y., M.S.B.K.); Department of Ecology and Evolution, University of Chicago, Chicago, Illinois 60637 (S.C.-C.C., W.-H.L.); and School of Biological Sciences, Washington State University, Pullman, Washington 99164–4238 (M.S.B.K.)
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16
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Braun N, de Saint Germain A, Pillot JP, Boutet-Mercey S, Dalmais M, Antoniadi I, Li X, Maia-Grondard A, Le Signor C, Bouteiller N, Luo D, Bendahmane A, Turnbull C, Rameau C. The pea TCP transcription factor PsBRC1 acts downstream of Strigolactones to control shoot branching. PLANT PHYSIOLOGY 2012; 158:225-38. [PMID: 22045922 PMCID: PMC3252107 DOI: 10.1104/pp.111.182725] [Citation(s) in RCA: 254] [Impact Index Per Article: 21.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2011] [Accepted: 10/28/2011] [Indexed: 05/18/2023]
Abstract
The function of PsBRC1, the pea (Pisum sativum) homolog of the maize (Zea mays) TEOSINTE BRANCHED1 and the Arabidopsis (Arabidopsis thaliana) BRANCHED1 (AtBRC1) genes, was investigated. The pea Psbrc1 mutant displays an increased shoot-branching phenotype, is able to synthesize strigolactone (SL), and does not respond to SL application. The level of pleiotropy of the SL-deficient ramosus1 (rms1) mutant is higher than in the Psbrc1 mutant, rms1 exhibiting a relatively dwarf phenotype and more extensive branching at upper nodes. The PsBRC1 gene is mostly expressed in the axillary bud and is transcriptionally up-regulated by direct application of the synthetic SL GR24 and down-regulated by the cytokinin (CK) 6-benzylaminopurine. The results suggest that PsBRC1 may have a role in integrating SL and CK signals and that SLs act directly within the bud to regulate its outgrowth. However, the Psbrc1 mutant responds to 6-benzylaminopurine application and decapitation by increasing axillary bud length, implicating a PsBRC1-independent component of the CK response in sustained bud growth. In contrast to other SL-related mutants, the Psbrc1 mutation does not cause a decrease in the CK zeatin riboside in the xylem sap or a strong increase in RMS1 transcript levels, suggesting that the RMS2-dependent feedback is not activated in this mutant. Surprisingly, the double rms1 Psbrc1 mutant displays a strong increase in numbers of branches at cotyledonary nodes, whereas branching at upper nodes is not significantly higher than the branching in rms1. This phenotype indicates a localized regulation of branching at these nodes specific to pea.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | | | | | | | - Catherine Rameau
- Institut Jean-Pierre Bourgin, INRA UMR1318 INRA-AgroParisTech, F–78000 Versailles, France (N. Braun, A.d.S.G., J.-P.P., S.B.-M., A.M.-G., C.R.); School of Life Sciences, Sun Yat Sen University, Guangzhou 510275, China (X.L., D.L.); Unité de Recherche en Génomique Végétale, INRA/CNRS, 91057 Evry cedex, France (M.D., N. Bouteiller, A.B.); INRA Dijon, 21065 Dijon cedex, France (C.L.S.); Division of Cell and Molecular Biology, Imperial College London, London SW7 2AZ, United Kingdom (I.A., C.T.)
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17
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Sarvepalli K, Nath U. Interaction of TCP4-mediated growth module with phytohormones. PLANT SIGNALING & BEHAVIOR 2011; 6:1440-3. [PMID: 21904111 PMCID: PMC3256365 DOI: 10.4161/psb.6.10.17097] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2011] [Accepted: 07/05/2011] [Indexed: 05/19/2023]
Abstract
TCP4 and related members of class II TCP genes regulate leaf morphogenesis. We earlier demonstrated that level of TCP4 activity determines leaf size and aspects of plant maturity. The mechanism of TCP function and their target genes remain unidentified, limiting our understanding of TCP-mediated growth control. As leaf growth is influenced simultaneously by multiple phytohormones, we have studied if TCP4 interacts with any of the hormone-response pathways. Our analyses indicate a role for auxin, gibberellic acid and abscisic acid in TCP4-mediated control of leaf growth.
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Affiliation(s)
- Kavitha Sarvepalli
- Department of Microbiology and Cell Biology, Indian Institute of Science, Bangalore, Karnataka, India
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