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Sarkar MAR, Sarkar S, Islam MSU, Zohra FT, Rahman SM. A genome‑wide approach to the systematic and comprehensive analysis of LIM gene family in sorghum (Sorghum bicolor L.). Genomics Inform 2023; 21:e36. [PMID: 37813632 PMCID: PMC10584642 DOI: 10.5808/gi.23007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2023] [Revised: 06/23/2023] [Accepted: 08/09/2023] [Indexed: 10/11/2023] Open
Abstract
The LIM domain-containing proteins are dominantly found in plants and play a significant role in various biological processes such as gene transcription as well as actin cytoskeletal organization. Nevertheless, genome-wide identification as well as functional analysis of the LIM gene family have not yet been reported in the economically important plant sorghum (Sorghum bicolor L.). Therefore, we conducted an in silico identification and characterization of LIM genes in S. bicolor genome using integrated bioinformatics approaches. Based on phylogenetic tree analysis and conserved domain, we identified five LIM genes in S. bicolor (SbLIM) genome corresponding to Arabidopsis LIM (AtLIM) genes. The conserved domain, motif as well as gene structure analyses of the SbLIM gene family showed the similarity within the SbLIM and AtLIM members. The gene ontology (GO) enrichment study revealed that the candidate LIM genes are directly involved in cytoskeletal organization and various other important biological as well as molecular pathways. Some important families of regulating transcription factors such as ERF, MYB, WRKY, NAC, bZIP, C2H2, Dof, and G2-like were detected by analyzing their interaction network with identified SbLIM genes. The cis-acting regulatory elements related to predicted SbLIM genes were identified as responsive to light, hormones, stress, and other functions. The present study will provide valuable useful information about LIM genes in sorghum which would pave the way for the future study of functional pathways of candidate SbLIM genes as well as their regulatory factors in wet-lab experiments.
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Affiliation(s)
- Md. Abdur Rauf Sarkar
- Department of Genetic Engineering and Biotechnology, Faculty of Biological Science and Technology, Jashore University of Science and Technology, Jashore 7408, Bangladesh
| | - Salim Sarkar
- Department of Genetic Engineering and Biotechnology, Faculty of Biological Science and Technology, Jashore University of Science and Technology, Jashore 7408, Bangladesh
| | - Md Shohel Ul Islam
- Department of Genetic Engineering and Biotechnology, Faculty of Biological Science and Technology, Jashore University of Science and Technology, Jashore 7408, Bangladesh
| | - Fatema Tuz Zohra
- Department of Genetic Engineering and Biotechnology, Faculty of Biological Sciences, University of Rajshahi, Rajshahi 6205, Bangladesh
| | - Shaikh Mizanur Rahman
- Department of Genetic Engineering and Biotechnology, Faculty of Biological Science and Technology, Jashore University of Science and Technology, Jashore 7408, Bangladesh
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Mgrditchian T, Brown-Clay J, Hoffmann C, Müller T, Filali L, Ockfen E, Mao X, Moreau F, Casellas CP, Kaoma T, Mittelbronn M, Thomas C. Actin cytoskeleton depolymerization increases matrix metalloproteinase gene expression in breast cancer cells by promoting translocation of cysteine-rich protein 2 to the nucleus. Front Cell Dev Biol 2023; 11:1100938. [PMID: 37266453 PMCID: PMC10229898 DOI: 10.3389/fcell.2023.1100938] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Accepted: 04/21/2023] [Indexed: 06/03/2023] Open
Abstract
The actin cytoskeleton plays a critical role in cancer cell invasion and metastasis; however, the coordination of its multiple functions remains unclear. Actin dynamics in the cytoplasm control the formation of invadopodia, which are membrane protrusions that facilitate cancer cell invasion by focusing the secretion of extracellular matrix-degrading enzymes, including matrix metalloproteinases (MMPs). In this study, we investigated the nuclear role of cysteine-rich protein 2 (CRP2), a two LIM domain-containing F-actin-binding protein that we previously identified as a cytoskeletal component of invadopodia, in breast cancer cells. We found that F-actin depolymerization stimulates the translocation of CRP2 into the nucleus, resulting in an increase in the transcript levels of pro-invasive and pro-metastatic genes, including several members of the MMP gene family. We demonstrate that in the nucleus, CRP2 interacts with the transcription factor serum response factor (SRF), which is crucial for the expression of MMP-9 and MMP-13. Our data suggest that CRP2 and SRF cooperate to modulate of MMP expression levels. Furthermore, Kaplan-Meier analysis revealed a significant association between high-level expression of SRF and shorter overall survival and distant metastasis-free survival in breast cancer patients with a high CRP2 expression profile. Our findings suggest a model in which CRP2 mediates the coordination of cytoplasmic and nuclear processes driven by actin dynamics, ultimately resulting in the induction of invasive and metastatic behavior in breast cancer cells.
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Affiliation(s)
- Takouhie Mgrditchian
- Department of Cancer Research, Cytoskeleton and Cancer Progression, Luxembourg Institute of Health, Luxembourg, Luxembourg
| | - Joshua Brown-Clay
- Department of Cancer Research, Cytoskeleton and Cancer Progression, Luxembourg Institute of Health, Luxembourg, Luxembourg
| | - Céline Hoffmann
- Department of Cancer Research, Cytoskeleton and Cancer Progression, Luxembourg Institute of Health, Luxembourg, Luxembourg
| | - Tanja Müller
- Department of Cancer Research, Luxembourg Centre of Neuropathology, Luxembourg Institute of Health, Luxembourg, Luxembourg
| | - Liza Filali
- Department of Cancer Research, Cytoskeleton and Cancer Progression, Luxembourg Institute of Health, Luxembourg, Luxembourg
| | - Elena Ockfen
- Department of Cancer Research, Cytoskeleton and Cancer Progression, Luxembourg Institute of Health, Luxembourg, Luxembourg
| | - Xianqing Mao
- Department of Cancer Research, Cytoskeleton and Cancer Progression, Luxembourg Institute of Health, Luxembourg, Luxembourg
| | - Flora Moreau
- Department of Cancer Research, Cytoskeleton and Cancer Progression, Luxembourg Institute of Health, Luxembourg, Luxembourg
| | - Carla Pou Casellas
- Department of Cancer Research, Cytoskeleton and Cancer Progression, Luxembourg Institute of Health, Luxembourg, Luxembourg
| | - Tony Kaoma
- Bioinformatics Platform, Luxembourg, Luxembourg
| | - Michel Mittelbronn
- Department of Cancer Research, Luxembourg Centre of Neuropathology, Luxembourg Institute of Health, Luxembourg, Luxembourg
- Luxembourg Centre for Systems Biomedicine (LCSB), University of Luxembourg, Esch-surAlzette, Luxembourg
- Faculty of Science, Technology and Medicine (FSTM), University of Luxembourg, Esch-surAlzette, Luxembourg
- Department of Life Science and Medicine (DLSM), University of Luxembourg, Esch-surAlzette, Luxembourg
- National Center of Pathology (NCP), Laboratoire National de Santé (LNS), Dudelange, Luxembourg
- Luxembourg Center of Neuropathology (LCNP), Dudelange, Luxembourg
| | - Clément Thomas
- Department of Cancer Research, Cytoskeleton and Cancer Progression, Luxembourg Institute of Health, Luxembourg, Luxembourg
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Actin depolymerizing factor ADF7 inhibits actin bundling protein VILLIN1 to regulate root hair formation in response to osmotic stress in Arabidopsis. PLoS Genet 2022; 18:e1010338. [PMID: 36095000 PMCID: PMC9499291 DOI: 10.1371/journal.pgen.1010338] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2021] [Revised: 09/22/2022] [Accepted: 07/12/2022] [Indexed: 11/25/2022] Open
Abstract
Actin cytoskeleton is essential for root hair formation. However, the underlying molecular mechanisms of actin dynamics in root hair formation in response to abiotic stress are largely undiscovered. Here, genetic analysis showed that actin-depolymerizing protein ADF7 and actin-bundling protein VILLIN1 (VLN1) were positively and negatively involved in root hair formation of Arabidopsis respectively. Moreover, RT-qPCR, GUS staining, western blotting, and genetic analysis revealed that ADF7 played an important role in inhibiting the expression and function of VLN1 during root hair formation. Filament actin (F-actin) dynamics observation and actin pharmacological experiments indicated that ADF7-inhibited-VLN1 pathway led to the decline of F-actin bundling and thick bundle formation, as well as the increase of F-actin depolymerization and turnover to promote root hair formation. Furthermore, the F-actin dynamics mediated by ADF7-inhibited-VLN1 pathway was associated with the reactive oxygen species (ROS) accumulation in root hair formation. Finally, ADF7-inhibited-VLN1 pathway was critical for osmotic stress-induced root hair formation. Our work demonstrates that ADF7 inhibits VLN1 to regulate F-actin dynamics in root hair formation in response to osmotic stress, providing the novel evidence on the F-actin dynamics and their molecular mechanisms in root hair formation and in abiotic stress. Root hairs are required for plants to absorb nutrients and water. The dynamics of cytoskeleton such as actin filaments (F-actin) are necessary for the formation of root hairs, which is regulated by different kinds of cytoskeleton-binding proteins. At the same time, the dynamics of cytoskeleton are also involved in plant abiotic stress tolerance. However, there are few studies on the underlying molecular mechanisms of F-actin dynamics in root hair formation in response to abiotic stress. Actin depolymerization factor 7 (ADF7) and actin bunding protein Villin 1 (VLN1) are important actin-binding proteins in Arabidopsis. Here, we describe a pathway that ADF7 inhibits VLN1 to regulate F-actin dynamics in root hair formation in response to osmotic stress, providing a new evidence for the studies on the molecular mechanisms of F-actin dynamics in root hair formation and in plant abiotic stress tolerance.
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Silencing of a Cotton Actin-Binding Protein GhWLIM1C Decreases Resistance against Verticillium dahliae Infection. PLANTS 2022; 11:plants11141828. [PMID: 35890462 PMCID: PMC9316592 DOI: 10.3390/plants11141828] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/21/2022] [Revised: 07/09/2022] [Accepted: 07/09/2022] [Indexed: 11/16/2022]
Abstract
LIM proteins are widely spread in various types of plant cells and play diversely crucial cellular roles through actin cytoskeleton assembly and gene expression regulation. Till now, it has not been clear whether LIM proteins function in plant pathogen defense. In this study, we characterized a LIM protein, GhWLIM1C, in upland cotton (Gossypium hirsutum). We found that GhWLIM1C could bind and bundle the actin cytoskeleton, and it contains two LIM domains (LIM1 and LIM2). Both the two domains could bind directly to the actin filaments. Moreover, the LIM2 domain additionally bundles the actin cytoskeleton, indicating that it possesses a different biochemical activity than LIM1. The expression of GhWLIM1C responds to the infection of the cotton fungal pathogen Verticillium dahliae (V. dahliae). Silencing of GhWLIM1C decreased cotton resistance to V. dahliae. These may be associated with the down regulated plant defense response, including the PR genes expression and ROS accumulation in the infected cotton plants. In all, these results provide new evidence that a plant LIM protein functions in plant pathogen resistance and the assembly of the actin cytoskeleton are closely related to the triggering of the plant defense response.
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Nian L, Liu X, Yang Y, Zhu X, Yi X, Haider FU. Genome-wide identification, phylogenetic, and expression analysis under abiotic stress conditions of LIM gene family in Medicago sativa L. PLoS One 2021; 16:e0252213. [PMID: 34191816 PMCID: PMC8244919 DOI: 10.1371/journal.pone.0252213] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2021] [Accepted: 05/12/2021] [Indexed: 12/20/2022] Open
Abstract
The LIM (Lin-11, Isl-1 and Mec-3 domains) family is a key transcription factor widely distributed in animals and plants. The LIM proteins in plants are involved in the regulation of a variety of biological processes, including cytoskeletal organization, the development of secondary cell walls, and cell differentiation. It has been identified and analyzed in many species. However, the systematic identification and analysis of the LIM genes family have not yet been reported in alfalfa (Medicago sativa L.). Based on the genome-wide data of alfalfa, a total of 21 LIM genes were identified and named MsLIM01-MsLIM21. Comprehensive analysis of the chromosome location, physicochemical properties of the protein, evolutionary relationship, conserved motifs, and responses to abiotic stresses of the LIM gene family in alfalfa using bioinformatics methods. The results showed that these MsLIM genes were distributed unequally on 21 of the 32 chromosomes in alfalfa. Gene duplication analysis showed that segmental duplications were the major contributors to the expansion of the alfalfa LIM family. Based on phylogenetic analyses, the LIM gene family of alfalfa can be divided into four subfamilies: αLIM subfamily, βLIM subfamily, γLIM subfamily, and δLIM subfamily, and approximately all the LIM genes within the same subfamily shared similar gene structure. The 21 MsLIM genes of alfalfa contain 10 Motifs, of which Motif1 and Motif3 are the conserved motifs shared by these genes. Furthermore, the analysis of cis-regulatory elements indicated that regulatory elements related to transcription, cell cycle, development, hormone, and stress response are abundant in the promoter sequence of MsLIM genes. Real-time quantitative PCR demonstrated that MsLIM gene expression is induced by low temperature and salt. The present study serves as a basic foundation for future functional studies on the alfalfa LIM family.
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Affiliation(s)
- Lili Nian
- College of Forestry, Gansu Agricultural University, Lanzhou, China
| | - Xuelu Liu
- College of Forestry, Gansu Agricultural University, Lanzhou, China
- College of Resources and Environmental Sciences, Gansu Agricultural University, Lanzhou, China
| | - Yingbo Yang
- College of Resources and Environmental Sciences, Gansu Agricultural University, Lanzhou, China
| | - Xiaolin Zhu
- College of Agronomy, Gansu Agricultural University, Lanzhou, China
| | - Xianfeng Yi
- The Animal Husbandry Research Institute of Guangxi Zhuang Autonomous Region, Nanning, China
| | - Fasih Ullah Haider
- College of Resources and Environmental Sciences, Gansu Agricultural University, Lanzhou, China
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Raghavendra KP, Das J, Kumar R, Gawande SP, Santosh HB, Sheeba JA, Kranthi S, Kranthi KR, Waghmare VN. Genome-wide identification and expression analysis of the plant specific LIM genes in Gossypium arboreum under phytohormone, salt and pathogen stress. Sci Rep 2021; 11:9177. [PMID: 33911097 PMCID: PMC8080811 DOI: 10.1038/s41598-021-87934-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2020] [Accepted: 03/30/2021] [Indexed: 11/09/2022] Open
Abstract
Asiatic cotton (Gossypium arboreum) cultivated as ‘desi cotton’ in India, is renowned for its climate resilience and robustness against biotic and abiotic stresses. The genome of G. arboreum is therefore, considered as a valued reserve of information for discovering novel genes or gene functions for trait improvements in the present context of cotton cultivation world-wide. In the present study, we carried out genome-wide analysis of LIM gene family in desi cotton and identified twenty LIM domain proteins (GaLIMs) which include sixteen animals CRP-like GaLIMs and four plant specific GaLIMs with presence (GaDA1) or absence (GaDAR) of UIM (Ubiquitin Interacting Motifs). Among the sixteen CRP-like GaLIMs, eleven had two conventional LIM domains while, five had single LIM domain which was not reported in LIM gene family of the plant species studied, except in Brassica rapa. Phylogenetic analysis of these twenty GaLIM proteins in comparison with LIMs of Arabidopsis, chickpea and poplar categorized them into distinct αLIM1, βLIM1, γLIM2, δLIM2 groups in CRP-like LIMs, and GaDA1 and GaDAR in plant specific LIMs group. Domain analysis had revealed consensus [(C-X2-C-X17-H-X2-C)-X2-(C-X2-C-X17-C-X2-H)] and [(C-X2-C-X17-H-X2-C)-X2-(C-X4-C-X15-C-X2-H)] being conserved as first and/or second LIM domains of animal CRP-like GaLIMs, respectively. Interestingly, single LIM domain containing GaLIM15 was found to contain unique consensus with longer inter-zinc-motif spacer but shorter second zinc finger motif. All twenty GaLIMs showed variable spatio-temporal expression patterns and accordingly further categorized into distinct groups of αLIM1, βLIM1, γLIM2 δLIM2 and plant specific LIM (DA1/DAR). For the first time, response of GaDA1/DAR under the influence of biotic and abiotic stresses were studied in cotton, involving treatments with phytohormones (Jasmonic acid and Abscisic acid), salt (NaCl) and wilt causing pathogen (Fusarium oxysporum). Expressions patterns of GaDA1/DAR showed variable response and identified GaDA2 as a probable candidate gene for stress tolerance in G. arboreum.
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Affiliation(s)
- K P Raghavendra
- Division of Crop Improvement, ICAR - Central Institute for Cotton Research (CICR), Nagpur, Maharashtra, India.
| | - J Das
- Division of Crop Improvement, ICAR - Central Institute for Cotton Research (CICR), Nagpur, Maharashtra, India
| | - R Kumar
- Division of Crop Improvement, ICAR - Central Institute for Cotton Research (CICR), Nagpur, Maharashtra, India
| | - S P Gawande
- Division of Crop Protection, ICAR - Central Institute for Cotton Research (CICR), Nagpur, Maharashtra, India
| | - H B Santosh
- Division of Crop Improvement, ICAR - Central Institute for Cotton Research (CICR), Nagpur, Maharashtra, India
| | - J A Sheeba
- Division of Crop Production, ICAR - Central Institute for Cotton Research (CICR), Nagpur, Maharashtra, India
| | - S Kranthi
- Division of Crop Protection, ICAR - Central Institute for Cotton Research (CICR), Nagpur, Maharashtra, India
| | - K R Kranthi
- Technical Information Section, International Cotton Advisory Committee (ICAC), Washington, DC, USA
| | - V N Waghmare
- Division of Crop Improvement, ICAR - Central Institute for Cotton Research (CICR), Nagpur, Maharashtra, India
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Zhu X, Wang B, Wang X, Zhang C, Wei X. Genome-wide identification, characterization and expression analysis of the LIM transcription factor family in quinoa. PHYSIOLOGY AND MOLECULAR BIOLOGY OF PLANTS : AN INTERNATIONAL JOURNAL OF FUNCTIONAL PLANT BIOLOGY 2021; 27:787-800. [PMID: 33967462 PMCID: PMC8055757 DOI: 10.1007/s12298-021-00988-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2020] [Revised: 03/28/2021] [Accepted: 04/03/2021] [Indexed: 05/05/2023]
Abstract
UNLABELLED Lim family members play an important role in the regulation of plant cell development and stress response. However, there are few studies on LIM family in quinoa. In this study, we identified nine LIMS (named cqlim01-cqlim09) from quinoa, which were divided into three subfamilies (α Lim1, γ lim2 and δ lim2) according to phylogeny. The differences in gene structure and motif composition among different subfamilies have been observed. In addition, we studied the repetitive events of the members of the family. The Ka/Ks (non synchronous substitution rate / synchronous substitution rate) ratio analysis showed that the repetitive CqLIMs probably experienced purifying selection pressure. Promoter analysis showed that the family genes contained a variety of hormones, stress and tissue-specific expression elements, and protein interactions showed that these genes had actin stabilizing effect. In addition, QRT PCR results showed that all CqLIM genes were positively regulated under three stresses (low temperature, salt and ABA). These results provide a theoretical basis of further study of LIM gene in quinoa. SUPPLEMENTARY INFORMATION The online version contains supplementary material available at 10.1007/s12298-021-00988-2.
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Affiliation(s)
- Xiaolin Zhu
- College of Agronomy, Gansu Agricultural University, Lanzhou, 730070 China
- Gansu Provincial Key Laboratory of Aridland Crop Science, Gansu Agricultural University, Lanzhou, 730070 China
| | - Baoqiang Wang
- Gansu Provincial Key Laboratory of Aridland Crop Science, Gansu Agricultural University, Lanzhou, 730070 China
| | - Xian Wang
- Gansu Provincial Key Laboratory of Aridland Crop Science, Gansu Agricultural University, Lanzhou, 730070 China
| | - Chaoyang Zhang
- Gansu Provincial Key Laboratory of Aridland Crop Science, Gansu Agricultural University, Lanzhou, 730070 China
| | - Xiaohong Wei
- College of Agronomy, Gansu Agricultural University, Lanzhou, 730070 China
- Gansu Provincial Key Laboratory of Aridland Crop Science, Gansu Agricultural University, Lanzhou, 730070 China
- College of Life Science and Technology, Gansu Agricultural University, Lanzhou, 730070 China
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Hui S, Shi Y, Tian J, Wang L, Li Y, Wang S, Yuan M. TALE-carrying bacterial pathogens trap host nuclear import receptors for facilitation of infection of rice. MOLECULAR PLANT PATHOLOGY 2019; 20:519-532. [PMID: 30499169 PMCID: PMC6637887 DOI: 10.1111/mpp.12772] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
Many plant-pathogenic Xanthomonas rely on the secretion of virulence transcription activator-like effector (TALE) proteins into plant cells to activate plant susceptibility genes to cause disease. The process is dependent on the binding of TALEs to specific elements of host target gene promoters in the plant nucleus. However, it is unclear how TALEs, after injection into host cells, are transferred from the plant cytoplasm into the plant nucleus, which is the key step of successful pathogen infection. Here, we show that the host plant cytoplasm/nuclear shuttle proteins OsImpα1a and OsImpα1b are key components for infection by the TALE-carrying bacterial pathogens Xanthomonas oryzae pv. oryzae (Xoo) and Xanthomonas oryzae pv. oryzicola (Xoc), the causal agents of bacterial leaf blight and bacterial leaf streak, respectively, in rice. Direct interaction between the second nuclear localization signal of TALEs of Xoo or Xoc and OsImpα1a or OsImpα1b is required for the transportation of TALEs into the nucleus. Conversely, suppression of the expression of OsImpα1a and OsImpα1b genes attenuates the shuttling of TALEs from the cytoplasm into the nucleus and the induction of susceptibility genes, thus improving the broad-spectrum disease resistance of rice to Xoo and Xoc. These results provide an applicable strategy for the improvement of resistance to TALE-carrying pathogens in rice by moderate suppression of the expression of plant nuclear import receptor proteins.
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Affiliation(s)
- Shugang Hui
- National Key Laboratory of Crop Genetic ImprovementNational Center of Plant Gene Research (Wuhan), Huazhong Agricultural UniversityWuhan430070China
| | - Yarui Shi
- National Key Laboratory of Crop Genetic ImprovementNational Center of Plant Gene Research (Wuhan), Huazhong Agricultural UniversityWuhan430070China
| | - Jingjing Tian
- National Key Laboratory of Crop Genetic ImprovementNational Center of Plant Gene Research (Wuhan), Huazhong Agricultural UniversityWuhan430070China
| | - Li Wang
- National Key Laboratory of Crop Genetic ImprovementNational Center of Plant Gene Research (Wuhan), Huazhong Agricultural UniversityWuhan430070China
| | - Yueyue Li
- National Key Laboratory of Crop Genetic ImprovementNational Center of Plant Gene Research (Wuhan), Huazhong Agricultural UniversityWuhan430070China
| | - Shiping Wang
- National Key Laboratory of Crop Genetic ImprovementNational Center of Plant Gene Research (Wuhan), Huazhong Agricultural UniversityWuhan430070China
| | - Meng Yuan
- National Key Laboratory of Crop Genetic ImprovementNational Center of Plant Gene Research (Wuhan), Huazhong Agricultural UniversityWuhan430070China
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Qian D, Xiang Y. Actin Cytoskeleton as Actor in Upstream and Downstream of Calcium Signaling in Plant Cells. Int J Mol Sci 2019; 20:ijms20061403. [PMID: 30897737 PMCID: PMC6471457 DOI: 10.3390/ijms20061403] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2019] [Revised: 03/14/2019] [Accepted: 03/15/2019] [Indexed: 01/04/2023] Open
Abstract
In plant cells, calcium (Ca2+) serves as a versatile intracellular messenger, participating in several fundamental and important biological processes. Recent studies have shown that the actin cytoskeleton is not only an upstream regulator of Ca2+ signaling, but also a downstream regulator. Ca2+ has been shown to regulates actin dynamics and rearrangements via different mechanisms in plants, and on this basis, the upstream signaling encoded within the Ca2+ transient can be decoded. Moreover, actin dynamics have also been proposed to act as an upstream of Ca2+, adjust Ca2+ oscillations, and establish cytosolic Ca2+ ([Ca2+]cyt) gradients in plant cells. In the current review, we focus on the advances in uncovering the relationship between the actin cytoskeleton and calcium in plant cells and summarize our current understanding of this relationship.
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Affiliation(s)
- Dong Qian
- MOE Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou 730000, China.
| | - Yun Xiang
- MOE Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou 730000, China.
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Genome-Wide Analysis of LIM Family Genes in Foxtail Millet ( Setaria italica L.) and Characterization of the Role of SiWLIM2b in Drought Tolerance. Int J Mol Sci 2019; 20:ijms20061303. [PMID: 30875867 PMCID: PMC6470693 DOI: 10.3390/ijms20061303] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2019] [Revised: 03/10/2019] [Accepted: 03/11/2019] [Indexed: 12/12/2022] Open
Abstract
LIM proteins have been found to play important roles in many life activities, including the regulation of gene expression, construction of the cytoskeleton, signal transduction and metabolic regulation. Because of their important roles in many aspects of plant development, LIM genes have been studied in many plant species. However, the LIM gene family has not yet been characterized in foxtail millet. In this study, we analyzed the whole genome of foxtail millet and identified 10 LIM genes. All LIM gene promoters contain MYB and MYC cis-acting elements that are related to drought stress. Based on the presence of multiple abiotic stress-related cis-elements in the promoter of SiWLIM2b, we chose this gene for further study. We analyzed SiWLIM2b expression under abiotic stress and hormone treatments using qRT-PCR. We found that SiWLIM2b was induced by various abiotic stresses and hormones. Under drought conditions, transgenic rice of SiWLIM2b-overexpression had a higher survival rate, higher relative water content and less cell damage than wild type (WT) rice. These results indicate that overexpression of the foxtail millet SiWLIM2b gene enhances drought tolerance in transgenic rice, and the SiWLIM2b gene can potentially be used for molecular breeding of crops with increased resistance to abiotic stress.
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Li Y, Wang NN, Wang Y, Liu D, Gao Y, Li L, Li XB. The cotton XLIM protein (GhXLIM6) is required for fiber development via maintaining dynamic F-actin cytoskeleton and modulating cellulose biosynthesis. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2018; 96:1269-1282. [PMID: 30256468 DOI: 10.1111/tpj.14108] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2018] [Revised: 09/17/2018] [Accepted: 09/20/2018] [Indexed: 06/08/2023]
Abstract
LIM domain proteins are cysteine-rich proteins, and are often considered as actin bundlers and transcription factors in plants. However, the roles of XLIM proteins in plants (especially in cotton) remain unexplored in detail so far. In this study, we identified a cotton XLIM protein (GhXLIM6) that is preferentially expressed in cotton fiber during whole elongation stage and early secondary cell wall (SCW) synthesis stage. The GhXLIM6-silenced transgenic cotton produces shorter fibers with thinner cell walls, compared with wild-type (WT). GhXLIM6 protein could directly bind F-actin and promote actin polymerization both in vitro and in vivo. It also acts as a transcription factor to suppress GhKNL1 expression through binding the PAL-box element of GhKNL1 promoter, and subsequently regulate the expression of CesA genes related to cellulose biosynthesis and deposition in SCWs of cotton fibers. The cellulose content in fibers of GhXLIM6RNAi cotton is lower than that in WT. Taken together, these data reveal the dual roles of GhXLIM6 in fiber development. On one hand, GhXLIM6 functions in fiber elongation through binding to F-actin to maintain the dynamic F-actin cytoskeleton. On the other hand, GhXLIM6 fine-tunes fiber SCW formation, probably through directly suppressing transcription of GhKNL1 to promote cellulose biosynthesis.
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Affiliation(s)
- Yang Li
- Hubei Key Laboratory of Genetic Regulation and Integrative Biology, School of Life Sciences, Central China Normal University, Wuhan, 430079, China
| | - Na-Na Wang
- Hubei Key Laboratory of Genetic Regulation and Integrative Biology, School of Life Sciences, Central China Normal University, Wuhan, 430079, China
| | - Yao Wang
- Hubei Key Laboratory of Genetic Regulation and Integrative Biology, School of Life Sciences, Central China Normal University, Wuhan, 430079, China
| | - Dong Liu
- Hubei Key Laboratory of Genetic Regulation and Integrative Biology, School of Life Sciences, Central China Normal University, Wuhan, 430079, China
| | - Ya Gao
- Hubei Key Laboratory of Genetic Regulation and Integrative Biology, School of Life Sciences, Central China Normal University, Wuhan, 430079, China
| | - Lan Li
- Hubei Key Laboratory of Genetic Regulation and Integrative Biology, School of Life Sciences, Central China Normal University, Wuhan, 430079, China
| | - Xue-Bao Li
- Hubei Key Laboratory of Genetic Regulation and Integrative Biology, School of Life Sciences, Central China Normal University, Wuhan, 430079, China
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12
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Sala S, Ampe C. An emerging link between LIM domain proteins and nuclear receptors. Cell Mol Life Sci 2018; 75:1959-1971. [PMID: 29428964 PMCID: PMC11105726 DOI: 10.1007/s00018-018-2774-3] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2017] [Revised: 02/01/2018] [Accepted: 02/06/2018] [Indexed: 12/13/2022]
Abstract
Nuclear receptors are ligand-activated transcription factors that partake in several biological processes including development, reproduction and metabolism. Over the last decade, evidence has accumulated that group 2, 3 and 4 LIM domain proteins, primarily known for their roles in actin cytoskeleton organization, also partake in gene transcription regulation. They shuttle between the cytoplasm and the nucleus, amongst other as a consequence of triggering cells with ligands of nuclear receptors. LIM domain proteins act as important coregulators of nuclear receptor-mediated gene transcription, in which they can either function as coactivators or corepressors. In establishing interactions with nuclear receptors, the LIM domains are important, yet pleiotropy of LIM domain proteins and nuclear receptors frequently occurs. LIM domain protein-nuclear receptor complexes function in diverse physiological processes. Their association is, however, often linked to diseases including cancer.
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Affiliation(s)
- Stefano Sala
- Department of Biochemistry, Ghent University, Ghent, Belgium
| | - Christophe Ampe
- Department of Biochemistry, Ghent University, Ghent, Belgium.
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13
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Hoffmann C, Brown-Clay J, Thomas C. Subcellular localization and function of 2LIM proteins in plants and humans. PLANTA 2017; 246:1243-1245. [PMID: 28993895 DOI: 10.1007/s00425-017-2789-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2017] [Accepted: 09/29/2017] [Indexed: 06/07/2023]
Affiliation(s)
- Céline Hoffmann
- Laboratory of Experimental Cancer Research, Department of Oncology, Luxembourg Institute of Health, 84 Val, Fleuri, Luxembourg, Luxembourg
| | - Josh Brown-Clay
- Laboratory of Experimental Cancer Research, Department of Oncology, Luxembourg Institute of Health, 84 Val, Fleuri, Luxembourg, Luxembourg
| | - Clément Thomas
- Laboratory of Experimental Cancer Research, Department of Oncology, Luxembourg Institute of Health, 84 Val, Fleuri, Luxembourg, Luxembourg.
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14
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Zhu J, Nan Q, Qin T, Qian D, Mao T, Yuan S, Wu X, Niu Y, Bai Q, An L, Xiang Y. Higher-Ordered Actin Structures Remodeled by Arabidopsis ACTIN-DEPOLYMERIZING FACTOR5 Are Important for Pollen Germination and Pollen Tube Growth. MOLECULAR PLANT 2017; 10:1065-1081. [PMID: 28606871 DOI: 10.1016/j.molp.2017.06.001] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2017] [Revised: 06/02/2017] [Accepted: 06/05/2017] [Indexed: 06/07/2023]
Abstract
Dynamics of the actin cytoskeleton are essential for pollen germination and pollen tube growth. ACTIN-DEPOLYMERIZING FACTORs (ADFs) typically contribute to actin turnover by severing/depolymerizing actin filaments. Recently, we demonstrated that Arabidopsis subclass III ADFs (ADF5 and ADF9) evolved F-actin-bundling function from conserved F-actin-depolymerizing function. However, little is known about the physiological function, the evolutional significance, and the actin-bundling mechanism of these neofunctionalized ADFs. Here, we report that loss of ADF5 function caused delayed pollen germination, retarded pollen tube growth, and increased sensitive to latrunculin B (LatB) treatment by affecting the generation and maintenance of actin bundles. Examination of actin filament dynamics in living cells revealed that the bundling frequency was significantly decreased in adf5 pollen tubes, consistent with its biochemical functions. Further biochemical and genetic complementation analyses demonstrated that both the N- and C-terminal actin-binding domains of ADF5 are required for its physiological and biochemical functions. Interestingly, while both are atypical actin-bundling ADFs, ADF5, but not ADF9, plays an important role in mature pollen physiological activities. Taken together, our results suggest that ADF5 has evolved the function of bundling actin filaments and plays an important role in the formation, organization, and maintenance of actin bundles during pollen germination and pollen tube growth.
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Affiliation(s)
- Jingen Zhu
- MOE Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou 730000, China
| | - Qiong Nan
- MOE Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou 730000, China
| | - Tao Qin
- State Key Laboratory of Plant Physiology and Biochemistry, Department of Plant Sciences, College of Biological Sciences, China Agricultural University, Beijing 100193, China
| | - Dong Qian
- MOE Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou 730000, China
| | - Tonglin Mao
- State Key Laboratory of Plant Physiology and Biochemistry, Department of Plant Sciences, College of Biological Sciences, China Agricultural University, Beijing 100193, China
| | - Shunjie Yuan
- MOE Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou 730000, China
| | - Xiaorong Wu
- MOE Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou 730000, China
| | - Yue Niu
- MOE Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou 730000, China
| | - Qifeng Bai
- MOE Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou 730000, China
| | - Lizhe An
- MOE Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou 730000, China
| | - Yun Xiang
- MOE Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou 730000, China.
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15
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Shimono M, Higaki T, Kaku H, Shibuya N, Hasezawa S, Day B. Quantitative Evaluation of Stomatal Cytoskeletal Patterns during the Activation of Immune Signaling in Arabidopsis thaliana. PLoS One 2016; 11:e0159291. [PMID: 27415815 PMCID: PMC4944930 DOI: 10.1371/journal.pone.0159291] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2016] [Accepted: 06/30/2016] [Indexed: 12/02/2022] Open
Abstract
Historically viewed as primarily functioning in the regulation of gas and water vapor exchange, it is now evident that stomata serve an important role in plant immunity. Indeed, in addition to classically defined functions related to cell architecture and movement, the actin cytoskeleton has emerged as a central component of the plant immune system, underpinning not only processes related to cell shape and movement, but also receptor activation and signaling. Using high resolution quantitative imaging techniques, the temporal and spatial changes in the actin microfilament array during diurnal cycling of stomatal guard cells has revealed a highly orchestrated transition from random arrays to ordered bundled filaments. While recent studies have demonstrated that plant stomata close in response to pathogen infection, an evaluation of stimulus-induced changes in actin cytoskeletal dynamics during immune activation in the guard cell, as well as the relationship of these changes to the function of the actin cytoskeleton and stomatal aperture, remains undefined. In the current study, we employed quantitative cell imaging and hierarchical clustering analyses to define the response of the guard cell actin cytoskeleton to pathogen infection and the elicitation of immune signaling. Using this approach, we demonstrate that stomatal-localized actin filaments respond rapidly, and specifically, to both bacterial phytopathogens and purified pathogen elicitors. Notably, we demonstrate that higher order temporal and spatial changes in the filament array show distinct patterns of organization during immune activation, and that changes in the naïve diurnal oscillations of guard cell actin filaments are perturbed by pathogens, and that these changes parallel pathogen-induced stomatal gating. The data presented herein demonstrate the application of a highly tractable and quantifiable method to assign transitions in actin filament organization to the activation of immune signaling in plants.
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Affiliation(s)
- Masaki Shimono
- Department of Plant, Soil, and Microbial Sciences, 1066 Bogue Street A286, Michigan State University, East Lansing, Michigan, 48824, United States of America
| | - Takumi Higaki
- Department of Integrated Biosciences, The University of Tokyo, Kashiwanoha 5-1-5, Kashiwa, Chiba, 277–8562, Japan
| | - Hanae Kaku
- Department of Life Sciences, School of Agriculture, Meiji University, 1-1-1 Higashimita, Tama-Ku, Kawasaki, 214–8571, Japan
| | - Naoto Shibuya
- Department of Life Sciences, School of Agriculture, Meiji University, 1-1-1 Higashimita, Tama-Ku, Kawasaki, 214–8571, Japan
| | - Seiichiro Hasezawa
- Department of Integrated Biosciences, The University of Tokyo, Kashiwanoha 5-1-5, Kashiwa, Chiba, 277–8562, Japan
| | - Brad Day
- Department of Plant, Soil, and Microbial Sciences, 1066 Bogue Street A286, Michigan State University, East Lansing, Michigan, 48824, United States of America
- Graduate Program in Genetics, 2240E Biomedical Physical Sciences, Michigan State University, East Lansing, Michigan, 48824, United States of America
- Graduate Program in Cell and Molecular Biology, 2240A Biomedical Physical Sciences, Michigan State University, East Lansing, Michigan, 48824, United States of America
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16
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Shimono M, Lu YJ, Porter K, Kvitko BH, Henty-Ridilla J, Creason A, He SY, Chang JH, Staiger CJ, Day B. The Pseudomonas syringae Type III Effector HopG1 Induces Actin Remodeling to Promote Symptom Development and Susceptibility during Infection. PLANT PHYSIOLOGY 2016; 171:2239-55. [PMID: 27217495 PMCID: PMC4936540 DOI: 10.1104/pp.16.01593] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2016] [Accepted: 05/19/2016] [Indexed: 05/20/2023]
Abstract
The plant cytoskeleton underpins the function of a multitude of cellular mechanisms, including those associated with developmental- and stress-associated signaling processes. In recent years, the actin cytoskeleton has been demonstrated to play a key role in plant immune signaling, including a recent demonstration that pathogens target actin filaments to block plant defense and immunity. Herein, we quantified spatial changes in host actin filament organization after infection with Pseudomonas syringae pv. tomato DC3000 (Pst DC3000), demonstrating that the type-III effector HopG1 is required for pathogen-induced changes to actin filament architecture and host disease symptom development during infection. Using a suite of pathogen effector deletion constructs, coupled with high-resolution microscopy, we found that deletion of hopG1 from Pst DC3000 resulted in a reduction in actin bundling and a concomitant increase in the density of filament arrays in Arabidopsis, both of which correlate with host disease symptom development. As a mechanism underpinning this activity, we further show that the HopG1 effector interacts with an Arabidopsis mitochondrial-localized kinesin motor protein. Kinesin mutant plants show reduced disease symptoms after pathogen infection, which can be complemented by actin-modifying agents. In total, our results support a model in which HopG1 induces changes in the organization of the actin cytoskeleton as part of its virulence function in promoting disease symptom development.
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Affiliation(s)
- Masaki Shimono
- Department of Plant, Soil and Microbial Sciences, Michigan State University, East Lansing, Michigan 48824 (M.S., Y.-J.L., B.D.); Graduate Program in Cell and Molecular Biology, Michigan State University, East Lansing, Michigan 48824 (K.P., S.Y.H., B.D.); Department of Energy Plant Research Laboratory, Michigan State University, East Lansing, Michigan 48824 (B.H.K., S.Y.H.); Department of Biological Sciences, Purdue University, West Lafayette, Indiana 47907-2064 (J.H.-R., C.J.S.); Department of Botany and Plant Pathology, Oregon State University, Corvallis, Oregon 97331-7303 (A.C., J.H.C.);Molecular and Cellular Biology Program, Oregon State University, Corvallis, Oregon 97331-7303 (A.C., J.H.C.);Howard Hughes Medical Institute and the Gordon and Betty Moore Foundation, Michigan State University, East Lansing, Michigan 48824 (S.Y.H.); Center for Genome Research and Biocomputing, Oregon State University, Corvallis, Oregon 97331-7303 (J.H.C.);Bindley Bioscience Center, Discovery Park, Purdue University, West Lafayette, Indiana 47907 (C.J.S.); and Graduate Program in Genetics, Michigan State University, East Lansing, Michigan 48824 (B.D.)
| | - Yi-Ju Lu
- Department of Plant, Soil and Microbial Sciences, Michigan State University, East Lansing, Michigan 48824 (M.S., Y.-J.L., B.D.); Graduate Program in Cell and Molecular Biology, Michigan State University, East Lansing, Michigan 48824 (K.P., S.Y.H., B.D.); Department of Energy Plant Research Laboratory, Michigan State University, East Lansing, Michigan 48824 (B.H.K., S.Y.H.); Department of Biological Sciences, Purdue University, West Lafayette, Indiana 47907-2064 (J.H.-R., C.J.S.); Department of Botany and Plant Pathology, Oregon State University, Corvallis, Oregon 97331-7303 (A.C., J.H.C.);Molecular and Cellular Biology Program, Oregon State University, Corvallis, Oregon 97331-7303 (A.C., J.H.C.);Howard Hughes Medical Institute and the Gordon and Betty Moore Foundation, Michigan State University, East Lansing, Michigan 48824 (S.Y.H.); Center for Genome Research and Biocomputing, Oregon State University, Corvallis, Oregon 97331-7303 (J.H.C.);Bindley Bioscience Center, Discovery Park, Purdue University, West Lafayette, Indiana 47907 (C.J.S.); and Graduate Program in Genetics, Michigan State University, East Lansing, Michigan 48824 (B.D.)
| | - Katie Porter
- Department of Plant, Soil and Microbial Sciences, Michigan State University, East Lansing, Michigan 48824 (M.S., Y.-J.L., B.D.); Graduate Program in Cell and Molecular Biology, Michigan State University, East Lansing, Michigan 48824 (K.P., S.Y.H., B.D.); Department of Energy Plant Research Laboratory, Michigan State University, East Lansing, Michigan 48824 (B.H.K., S.Y.H.); Department of Biological Sciences, Purdue University, West Lafayette, Indiana 47907-2064 (J.H.-R., C.J.S.); Department of Botany and Plant Pathology, Oregon State University, Corvallis, Oregon 97331-7303 (A.C., J.H.C.);Molecular and Cellular Biology Program, Oregon State University, Corvallis, Oregon 97331-7303 (A.C., J.H.C.);Howard Hughes Medical Institute and the Gordon and Betty Moore Foundation, Michigan State University, East Lansing, Michigan 48824 (S.Y.H.); Center for Genome Research and Biocomputing, Oregon State University, Corvallis, Oregon 97331-7303 (J.H.C.);Bindley Bioscience Center, Discovery Park, Purdue University, West Lafayette, Indiana 47907 (C.J.S.); and Graduate Program in Genetics, Michigan State University, East Lansing, Michigan 48824 (B.D.)
| | - Brian H Kvitko
- Department of Plant, Soil and Microbial Sciences, Michigan State University, East Lansing, Michigan 48824 (M.S., Y.-J.L., B.D.); Graduate Program in Cell and Molecular Biology, Michigan State University, East Lansing, Michigan 48824 (K.P., S.Y.H., B.D.); Department of Energy Plant Research Laboratory, Michigan State University, East Lansing, Michigan 48824 (B.H.K., S.Y.H.); Department of Biological Sciences, Purdue University, West Lafayette, Indiana 47907-2064 (J.H.-R., C.J.S.); Department of Botany and Plant Pathology, Oregon State University, Corvallis, Oregon 97331-7303 (A.C., J.H.C.);Molecular and Cellular Biology Program, Oregon State University, Corvallis, Oregon 97331-7303 (A.C., J.H.C.);Howard Hughes Medical Institute and the Gordon and Betty Moore Foundation, Michigan State University, East Lansing, Michigan 48824 (S.Y.H.); Center for Genome Research and Biocomputing, Oregon State University, Corvallis, Oregon 97331-7303 (J.H.C.);Bindley Bioscience Center, Discovery Park, Purdue University, West Lafayette, Indiana 47907 (C.J.S.); and Graduate Program in Genetics, Michigan State University, East Lansing, Michigan 48824 (B.D.)
| | - Jessica Henty-Ridilla
- Department of Plant, Soil and Microbial Sciences, Michigan State University, East Lansing, Michigan 48824 (M.S., Y.-J.L., B.D.); Graduate Program in Cell and Molecular Biology, Michigan State University, East Lansing, Michigan 48824 (K.P., S.Y.H., B.D.); Department of Energy Plant Research Laboratory, Michigan State University, East Lansing, Michigan 48824 (B.H.K., S.Y.H.); Department of Biological Sciences, Purdue University, West Lafayette, Indiana 47907-2064 (J.H.-R., C.J.S.); Department of Botany and Plant Pathology, Oregon State University, Corvallis, Oregon 97331-7303 (A.C., J.H.C.);Molecular and Cellular Biology Program, Oregon State University, Corvallis, Oregon 97331-7303 (A.C., J.H.C.);Howard Hughes Medical Institute and the Gordon and Betty Moore Foundation, Michigan State University, East Lansing, Michigan 48824 (S.Y.H.); Center for Genome Research and Biocomputing, Oregon State University, Corvallis, Oregon 97331-7303 (J.H.C.);Bindley Bioscience Center, Discovery Park, Purdue University, West Lafayette, Indiana 47907 (C.J.S.); and Graduate Program in Genetics, Michigan State University, East Lansing, Michigan 48824 (B.D.)
| | - Allison Creason
- Department of Plant, Soil and Microbial Sciences, Michigan State University, East Lansing, Michigan 48824 (M.S., Y.-J.L., B.D.); Graduate Program in Cell and Molecular Biology, Michigan State University, East Lansing, Michigan 48824 (K.P., S.Y.H., B.D.); Department of Energy Plant Research Laboratory, Michigan State University, East Lansing, Michigan 48824 (B.H.K., S.Y.H.); Department of Biological Sciences, Purdue University, West Lafayette, Indiana 47907-2064 (J.H.-R., C.J.S.); Department of Botany and Plant Pathology, Oregon State University, Corvallis, Oregon 97331-7303 (A.C., J.H.C.);Molecular and Cellular Biology Program, Oregon State University, Corvallis, Oregon 97331-7303 (A.C., J.H.C.);Howard Hughes Medical Institute and the Gordon and Betty Moore Foundation, Michigan State University, East Lansing, Michigan 48824 (S.Y.H.); Center for Genome Research and Biocomputing, Oregon State University, Corvallis, Oregon 97331-7303 (J.H.C.);Bindley Bioscience Center, Discovery Park, Purdue University, West Lafayette, Indiana 47907 (C.J.S.); and Graduate Program in Genetics, Michigan State University, East Lansing, Michigan 48824 (B.D.)
| | - Sheng Yang He
- Department of Plant, Soil and Microbial Sciences, Michigan State University, East Lansing, Michigan 48824 (M.S., Y.-J.L., B.D.); Graduate Program in Cell and Molecular Biology, Michigan State University, East Lansing, Michigan 48824 (K.P., S.Y.H., B.D.); Department of Energy Plant Research Laboratory, Michigan State University, East Lansing, Michigan 48824 (B.H.K., S.Y.H.); Department of Biological Sciences, Purdue University, West Lafayette, Indiana 47907-2064 (J.H.-R., C.J.S.); Department of Botany and Plant Pathology, Oregon State University, Corvallis, Oregon 97331-7303 (A.C., J.H.C.);Molecular and Cellular Biology Program, Oregon State University, Corvallis, Oregon 97331-7303 (A.C., J.H.C.);Howard Hughes Medical Institute and the Gordon and Betty Moore Foundation, Michigan State University, East Lansing, Michigan 48824 (S.Y.H.); Center for Genome Research and Biocomputing, Oregon State University, Corvallis, Oregon 97331-7303 (J.H.C.);Bindley Bioscience Center, Discovery Park, Purdue University, West Lafayette, Indiana 47907 (C.J.S.); and Graduate Program in Genetics, Michigan State University, East Lansing, Michigan 48824 (B.D.)
| | - Jeff H Chang
- Department of Plant, Soil and Microbial Sciences, Michigan State University, East Lansing, Michigan 48824 (M.S., Y.-J.L., B.D.); Graduate Program in Cell and Molecular Biology, Michigan State University, East Lansing, Michigan 48824 (K.P., S.Y.H., B.D.); Department of Energy Plant Research Laboratory, Michigan State University, East Lansing, Michigan 48824 (B.H.K., S.Y.H.); Department of Biological Sciences, Purdue University, West Lafayette, Indiana 47907-2064 (J.H.-R., C.J.S.); Department of Botany and Plant Pathology, Oregon State University, Corvallis, Oregon 97331-7303 (A.C., J.H.C.);Molecular and Cellular Biology Program, Oregon State University, Corvallis, Oregon 97331-7303 (A.C., J.H.C.);Howard Hughes Medical Institute and the Gordon and Betty Moore Foundation, Michigan State University, East Lansing, Michigan 48824 (S.Y.H.); Center for Genome Research and Biocomputing, Oregon State University, Corvallis, Oregon 97331-7303 (J.H.C.);Bindley Bioscience Center, Discovery Park, Purdue University, West Lafayette, Indiana 47907 (C.J.S.); and Graduate Program in Genetics, Michigan State University, East Lansing, Michigan 48824 (B.D.)
| | - Christopher J Staiger
- Department of Plant, Soil and Microbial Sciences, Michigan State University, East Lansing, Michigan 48824 (M.S., Y.-J.L., B.D.); Graduate Program in Cell and Molecular Biology, Michigan State University, East Lansing, Michigan 48824 (K.P., S.Y.H., B.D.); Department of Energy Plant Research Laboratory, Michigan State University, East Lansing, Michigan 48824 (B.H.K., S.Y.H.); Department of Biological Sciences, Purdue University, West Lafayette, Indiana 47907-2064 (J.H.-R., C.J.S.); Department of Botany and Plant Pathology, Oregon State University, Corvallis, Oregon 97331-7303 (A.C., J.H.C.);Molecular and Cellular Biology Program, Oregon State University, Corvallis, Oregon 97331-7303 (A.C., J.H.C.);Howard Hughes Medical Institute and the Gordon and Betty Moore Foundation, Michigan State University, East Lansing, Michigan 48824 (S.Y.H.); Center for Genome Research and Biocomputing, Oregon State University, Corvallis, Oregon 97331-7303 (J.H.C.);Bindley Bioscience Center, Discovery Park, Purdue University, West Lafayette, Indiana 47907 (C.J.S.); and Graduate Program in Genetics, Michigan State University, East Lansing, Michigan 48824 (B.D.)
| | - Brad Day
- Department of Plant, Soil and Microbial Sciences, Michigan State University, East Lansing, Michigan 48824 (M.S., Y.-J.L., B.D.); Graduate Program in Cell and Molecular Biology, Michigan State University, East Lansing, Michigan 48824 (K.P., S.Y.H., B.D.); Department of Energy Plant Research Laboratory, Michigan State University, East Lansing, Michigan 48824 (B.H.K., S.Y.H.); Department of Biological Sciences, Purdue University, West Lafayette, Indiana 47907-2064 (J.H.-R., C.J.S.); Department of Botany and Plant Pathology, Oregon State University, Corvallis, Oregon 97331-7303 (A.C., J.H.C.);Molecular and Cellular Biology Program, Oregon State University, Corvallis, Oregon 97331-7303 (A.C., J.H.C.);Howard Hughes Medical Institute and the Gordon and Betty Moore Foundation, Michigan State University, East Lansing, Michigan 48824 (S.Y.H.); Center for Genome Research and Biocomputing, Oregon State University, Corvallis, Oregon 97331-7303 (J.H.C.);Bindley Bioscience Center, Discovery Park, Purdue University, West Lafayette, Indiana 47907 (C.J.S.); and Graduate Program in Genetics, Michigan State University, East Lansing, Michigan 48824 (B.D.)
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17
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Ferreira SS, Hotta CT, Poelking VGDC, Leite DCC, Buckeridge MS, Loureiro ME, Barbosa MHP, Carneiro MS, Souza GM. Co-expression network analysis reveals transcription factors associated to cell wall biosynthesis in sugarcane. PLANT MOLECULAR BIOLOGY 2016; 91:15-35. [PMID: 26820137 PMCID: PMC4837222 DOI: 10.1007/s11103-016-0434-2] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2015] [Accepted: 01/07/2016] [Indexed: 05/18/2023]
Abstract
Sugarcane is a hybrid of Saccharum officinarum and Saccharum spontaneum, with minor contributions from other species in Saccharum and other genera. Understanding the molecular basis of cell wall metabolism in sugarcane may allow for rational changes in fiber quality and content when designing new energy crops. This work describes a comparative expression profiling of sugarcane ancestral genotypes: S. officinarum, S. spontaneum and S. robustum and a commercial hybrid: RB867515, linking gene expression to phenotypes to identify genes for sugarcane improvement. Oligoarray experiments of leaves, immature and intermediate internodes, detected 12,621 sense and 995 antisense transcripts. Amino acid metabolism was particularly evident among pathways showing natural antisense transcripts expression. For all tissues sampled, expression analysis revealed 831, 674 and 648 differentially expressed genes in S. officinarum, S. robustum and S. spontaneum, respectively, using RB867515 as reference. Expression of sugar transporters might explain sucrose differences among genotypes, but an unexpected differential expression of histones were also identified between high and low Brix° genotypes. Lignin biosynthetic genes and bioenergetics-related genes were up-regulated in the high lignin genotype, suggesting that these genes are important for S. spontaneum to allocate carbon to lignin, while S. officinarum allocates it to sucrose storage. Co-expression network analysis identified 18 transcription factors possibly related to cell wall biosynthesis while in silico analysis detected cis-elements involved in cell wall biosynthesis in their promoters. Our results provide information to elucidate regulatory networks underlying traits of interest that will allow the improvement of sugarcane for biofuel and chemicals production.
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Affiliation(s)
| | | | - Viviane Guzzo de Carli Poelking
- Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Viçosa, Brazil
- Universidade Federal do Recôncavo da Bahia, Cruz das Almas, Brazil
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18
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Porter K, Day B. From filaments to function: The role of the plant actin cytoskeleton in pathogen perception, signaling and immunity. JOURNAL OF INTEGRATIVE PLANT BIOLOGY 2016; 58:299-311. [PMID: 26514830 DOI: 10.1111/jipb.12445] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2015] [Accepted: 10/28/2015] [Indexed: 05/23/2023]
Abstract
The eukaryotic actin cytoskeleton is required for numerous cellular processes, including cell shape, development and movement, gene expression and signal transduction, and response to biotic and abiotic stress. In recent years, research in both plants and animal systems have described a function for actin as the ideal surveillance platform, linking the function and activity of primary physiological processes to the immune system. In this review, we will highlight recent advances that have defined the regulation and breadth of function of the actin cytoskeleton as a network required for defense signaling following pathogen infection. Coupled with an overview of recent work demonstrating specific targeting of the plant actin cytoskeleton by a diversity of pathogens, including bacteria, fungi and viruses, we will highlight the importance of actin as a key signaling hub in plants, one that mediates surveillance of cellular homeostasis and the activation of specific signaling responses following pathogen perception. Based on the studies highlighted herein, we propose a working model that posits changes in actin filament organization is in and of itself a highly specific signal, which induces, regulates and physically directs stimulus-specific signaling processes, most importantly, those associated with response to pathogens.
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Affiliation(s)
- Katie Porter
- Graduate Program in Cell and Molecular Biology, Michigan State University, East Lansing, MI, 48823, USA
| | - Brad Day
- Graduate Program in Cell and Molecular Biology, Michigan State University, East Lansing, MI, 48823, USA
- Department of Plant, Soil and Microbial Sciences, Michigan State University, East Lansing, MI, 48823, USA
- Graduate Program in Genetics, Michigan State University, East Lansing, MI, 48823, USA
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19
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Han L, Li Y, Sun Y, Wang H, Kong Z, Xia G. The two domains of cotton WLIM1a protein are functionally divergent. SCIENCE CHINA-LIFE SCIENCES 2016; 59:206-12. [PMID: 26803305 DOI: 10.1007/s11427-016-5002-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2015] [Accepted: 07/20/2015] [Indexed: 01/27/2023]
Affiliation(s)
- Libo Han
- State Key Laboratory of Plant Genomics, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, China.
| | - Yuanbao Li
- State Key Laboratory of Plant Genomics, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, China
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Yongduo Sun
- State Key Laboratory of Plant Genomics, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, China
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Haiyun Wang
- State Key Laboratory of Plant Genomics, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, China
| | - Zhaosheng Kong
- State Key Laboratory of Plant Genomics, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, China
| | - Guixian Xia
- State Key Laboratory of Plant Genomics, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, China
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Srivastava V, Verma PK. Genome Wide Identification of LIM Genes in Cicer arietinum and Response of Ca-2LIMs in Development, Hormone and Pathogenic Stress. PLoS One 2015; 10:e0138719. [PMID: 26418014 PMCID: PMC4587737 DOI: 10.1371/journal.pone.0138719] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2015] [Accepted: 09/02/2015] [Indexed: 11/20/2022] Open
Abstract
The eukaryotic lineage-specific LIM protein (LIN11, ISL1, and MEC3) family play pivotal role in modulation of actin dynamics and transcriptional regulation. The systematic investigation of this family has not been carried in detail and rare in legumes. Current study involves the mining of Cicer arietinum genome for the genes coding for LIM domain proteins and displayed significant homology with LIM genes of other species. The analysis led to the identification of 15 members, which were positioned on chickpea chromosomes. The phylogenetic and motif analysis suggested their categorization into two sub-families i.e., Ca-2LIMs and Ca-DA1/DAR, which comprised of nine and six candidates, respectively. Further sub-categories of Ca-2LIMs were recognised as αLIM, βLIM, δLIM and γLIM. The LIM genes within their sub-families displayed conserved genomic and motif organization. The expression pattern of Ca-2LIMs across developmental and reproductive tissues demonstrated strong correlation with established consensus. The Ca-2LIM belongs to PLIM and GLIM (XLIM) was found highly expressed in floral tissue. Others showed ubiquitous expression pattern with their dominance in stem. Under hormonal and pathogenic conditions these LIMs were found to up-regulate during salicylic acid, abscisic acid and Ascochyta rabiei treatment or infection; and down-regulated in response to jasmonic acid treatment. The findings of this work, particularly in terms of modulation of LIM genes under biotic stress will open up the way to further explore and establish the role of chickpea LIMs in plant defense response.
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Affiliation(s)
- Vikas Srivastava
- Plant Immunity Laboratory, National Institute of Plant Genome Research, Aruna Asaf Ali Marg, New Delhi, India
| | - Praveen Kumar Verma
- Plant Immunity Laboratory, National Institute of Plant Genome Research, Aruna Asaf Ali Marg, New Delhi, India
- * E-mail:
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21
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Li J, Henty-Ridilla JL, Staiger BH, Day B, Staiger CJ. Capping protein integrates multiple MAMP signalling pathways to modulate actin dynamics during plant innate immunity. Nat Commun 2015; 6:7206. [PMID: 26018794 PMCID: PMC4458898 DOI: 10.1038/ncomms8206] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2014] [Accepted: 04/17/2015] [Indexed: 12/13/2022] Open
Abstract
Plants and animals perceive diverse microbe-associated molecular patterns (MAMPs) via pattern recognition receptors and activate innate immune signalling. The actin cytoskeleton has been suggested as a target for innate immune signalling and a key transducer of cellular responses. However, the molecular mechanisms underlying actin remodelling and the precise functions of these rearrangements during innate immunity remain largely unknown. Here we demonstrate rapid actin remodelling in response to several distinct MAMP signalling pathways in plant epidermal cells. The regulation of actin dynamics is a convergence point for basal defence machinery, such as cell wall fortification and transcriptional reprogramming. Our quantitative analyses of actin dynamics and genetic studies reveal that MAMP-stimulated actin remodelling is due to the inhibition of capping protein (CP) by the signalling lipid, phosphatidic acid. In addition, CP promotes resistance against bacterial and fungal phytopathogens. These findings demonstrate that CP is a central target for the plant innate immune response.
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Affiliation(s)
- Jiejie Li
- Department of Biological Sciences, Purdue University, 335 Hansen Life Sciences Building, West Lafayette, Indiana 47907-2064, USA
| | - Jessica L. Henty-Ridilla
- Department of Biological Sciences, Purdue University, 335 Hansen Life Sciences Building, West Lafayette, Indiana 47907-2064, USA
| | - Benjamin H. Staiger
- Department of Biological Sciences, Purdue University, 335 Hansen Life Sciences Building, West Lafayette, Indiana 47907-2064, USA
| | - Brad Day
- Department of Plant, Soil and Microbial Sciences, Michigan State University, East Lansing, Michigan 48824-6254, USA
| | - Christopher J. Staiger
- Department of Biological Sciences, Purdue University, 335 Hansen Life Sciences Building, West Lafayette, Indiana 47907-2064, USA
- The Bindley Bioscience Center, Discovery Park, Purdue University, 1203 West State Street, West Lafayette, Indiana 47907, USA
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22
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Li L, Li Y, Wang NN, Li Y, Lu R, Li XB. Cotton LIM domain-containing protein GhPLIM1 is specifically expressed in anthers and participates in modulating F-actin. PLANT BIOLOGY (STUTTGART, GERMANY) 2015; 17:528-534. [PMID: 25294521 DOI: 10.1111/plb.12243] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2014] [Accepted: 06/23/2014] [Indexed: 06/03/2023]
Abstract
As one form of actin binding protein (ABP), LIM domain protein can trigger the formation of actin bundles during plant growth and development. In this study, a cDNA (designated GhPLIM1) encoding a LIM domain protein with 216 amino acid residues was identified from a cotton flower cDNA library. Quantitative RT-PCR indicated that GhPLIM1 is specifically expressed in cotton anthers, and its expression levels are regulated during anther development of cotton. GhPLIM1:eGFP transformed cotton cells display a distributed network of eGFP fluorescence, suggesting that GhPLIM1 protein is mainly localised to the cell cytoskeleton. In vitro high-speed co-sedimentation and low co-sedimentation assays indicate that GhPLIM1 protein not only directly binds actin filaments but also bundles F-actin. Further biochemical experiments verified that GhPLIM1 protein can protect F-actin against depolymerisation by Lat B. Thus, our data demonstrate that GhPLIM1 functions as an actin binding protein (ABP) in modulating actin filaments in vitro, suggesting that GhPLIM1 may be involved in regulating the actin cytoskeleton required for pollen development in cotton.
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Affiliation(s)
- L Li
- Hubei Key Laboratory of Genetic Regulation and Integrative Biology, School of Life Sciences, Central China Normal University, Wuhan, China
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23
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Guo P, Qi YP, Yang LT, Ye X, Jiang HX, Huang JH, Chen LS. cDNA-AFLP analysis reveals the adaptive responses of citrus to long-term boron-toxicity. BMC PLANT BIOLOGY 2014; 14:284. [PMID: 25348611 PMCID: PMC4219002 DOI: 10.1186/s12870-014-0284-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/13/2014] [Accepted: 10/14/2014] [Indexed: 05/02/2023]
Abstract
BACKGROUND Boron (B)-toxicity is an important disorder in agricultural regions across the world. Seedlings of 'Sour pummelo' (Citrus grandis) and 'Xuegan' (Citrus sinensis) were fertigated every other day until drip with 10 μM (control) or 400 μM (B-toxic) H3BO3 in a complete nutrient solution for 15 weeks. The aims of this study were to elucidate the adaptive mechanisms of citrus plants to B-toxicity and to identify B-tolerant genes. RESULTS B-toxicity-induced changes in seedlings growth, leaf CO2 assimilation, pigments, total soluble protein, malondialdehyde (MDA) and phosphorus were less pronounced in C. sinensis than in C. grandis. B concentration was higher in B-toxic C. sinensis leaves than in B-toxic C. grandis ones. Here we successfully used cDNA-AFLP to isolate 67 up-regulated and 65 down-regulated transcript-derived fragments (TDFs) from B-toxic C. grandis leaves, whilst only 31 up-regulated and 37 down-regulated TDFs from B-toxic C. sinensis ones, demonstrating that gene expression is less affected in B-toxic C. sinensis leaves than in B-toxic C. grandis ones. These differentially expressed TDFs were related to signal transduction, carbohydrate and energy metabolism, nucleic acid metabolism, protein and amino acid metabolism, lipid metabolism, cell wall and cytoskeleton modification, stress responses and cell transport. The higher B-tolerance of C. sinensis might be related to the findings that B-toxic C. sinensis leaves had higher expression levels of genes involved in photosynthesis, which might contribute to the higher photosyntheis and light utilization and less excess light energy, and in reactive oxygen species (ROS) scavenging compared to B-toxic C. grandis leaves, thus preventing them from photo-oxidative damage. In addition, B-toxicity-induced alteration in the expression levels of genes encoding inorganic pyrophosphatase 1, AT4G01850 and methionine synthase differed between the two species, which might play a role in the B-tolerance of C. sinensis. CONCLUSIONS C. sinensis leaves could tolerate higher level of B than C. grandis ones, thus improving the B-tolerance of C. sinensis plants. Our findings reveal some novel mechanisms on the tolerance of plants to B-toxicity at the gene expression level.
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Affiliation(s)
- Peng Guo
- />College of Resource and Environmental Science, Fujian Agriculture and Forestry University, Fuzhou, 350002 China
- />Institute of Horticultural Plant Physiology, Biochemistry and Molecular Biology, Fujian Agriculture and Forestry University, Fuzhou, 350002 China
| | - Yi-Ping Qi
- />Institute of Materia Medica, Fujian Academy of Medical Sciences, Fuzhou, 350001 China
| | - Lin-Tong Yang
- />College of Resource and Environmental Science, Fujian Agriculture and Forestry University, Fuzhou, 350002 China
- />Institute of Horticultural Plant Physiology, Biochemistry and Molecular Biology, Fujian Agriculture and Forestry University, Fuzhou, 350002 China
| | - Xin Ye
- />College of Resource and Environmental Science, Fujian Agriculture and Forestry University, Fuzhou, 350002 China
| | - Huan-Xin Jiang
- />Institute of Horticultural Plant Physiology, Biochemistry and Molecular Biology, Fujian Agriculture and Forestry University, Fuzhou, 350002 China
- />College of Life Science, Fujian Agriculture and Forestry University, Fuzhou, 350002 China
| | - Jing-Hao Huang
- />Institute of Horticultural Plant Physiology, Biochemistry and Molecular Biology, Fujian Agriculture and Forestry University, Fuzhou, 350002 China
- />College of Life Science, Fujian Agriculture and Forestry University, Fuzhou, 350002 China
- />Institute of Fruit Tree Science, Fujian Academy of Agricultural Sciences, Fuzhou, 350013 China
| | - Li-Song Chen
- />College of Resource and Environmental Science, Fujian Agriculture and Forestry University, Fuzhou, 350002 China
- />Institute of Horticultural Plant Physiology, Biochemistry and Molecular Biology, Fujian Agriculture and Forestry University, Fuzhou, 350002 China
- />Fujian Key Laboratory for Plant Molecular and Cell Biology, Fujian Agriculture and Forestry University, Fuzhou, 350002 China
- />The Higher Educational Key Laboratory of Fujian Province for Soil Ecosystem Health and Regulation, Fujian Agriculture and Forestry University, Fuzhou, 350002 China
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24
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Hoffmann C, Moes D, Dieterle M, Neumann K, Moreau F, Tavares Furtado A, Dumas D, Steinmetz A, Thomas C. Live cell imaging reveals actin-cytoskeleton-induced self-association of the actin-bundling protein WLIM1. J Cell Sci 2014; 127:583-98. [PMID: 24284066 DOI: 10.1242/jcs.134536] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Crosslinking of actin filaments into bundles is essential for the assembly and stabilization of specific cytoskeletal structures. However, relatively little is known about the molecular mechanisms underlying actin bundle formation. The two LIM-domain-containing proteins define a novel and evolutionarily conserved family of actin-bundling proteins whose actin-binding and -crosslinking activities primarily rely on their LIM domains. Using TIRF microscopy, we describe real-time formation of actin bundles induced by tobacco NtWLIM1 in vitro. We show that NtWLIM1 binds to single filaments and subsequently promotes their interaction and zippering into tight bundles of mixed polarity. NtWLIM1-induced bundles grew by both elongation of internal filaments and addition of preformed fragments at their extremities. Importantly, these data are highly consistent with the modes of bundle formation and growth observed in transgenic Arabidopsis plants expressing a GFP-fused Arabidopsis AtWLIM1 protein. Using two complementary live cell imaging approaches, a close relationship between NtWLIM1 subcellular localization and self-association was established. Indeed, both BiFC and FLIM-FRET data revealed that, although unstable NtWLIM1 complexes can sporadically form in the cytosol, stable complexes concentrate along the actin cytoskeleton. Remarkably, disruption of the actin cytoskeleton significantly impaired self-association of NtWLIM1. In addition, biochemical analyses support the idea that F-actin facilitates the switch of purified recombinant NtWLIM1 from a monomeric to a di- or oligomeric state. On the basis of our data, we propose a model in which actin binding promotes the formation and stabilization of NtWLIM1 complexes, which in turn might drive the crosslinking of actin filaments.
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Affiliation(s)
- Céline Hoffmann
- Centre de Recherche Public-Santé, 84 Val Fleuri, L-1526 Luxembourg, Luxembourg
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25
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Lockhart J. Towards breeding strong but fine cotton fibers with a little help from WLIM1a. THE PLANT CELL 2013; 25:4281. [PMID: 24220633 PMCID: PMC3875715 DOI: 10.1105/tpc.113.251110] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
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26
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Han LB, Li YB, Wang HY, Wu XM, Li CL, Luo M, Wu SJ, Kong ZS, Pei Y, Jiao GL, Xia GX. The dual functions of WLIM1a in cell elongation and secondary wall formation in developing cotton fibers. THE PLANT CELL 2013; 25:4421-38. [PMID: 24220634 PMCID: PMC3875727 DOI: 10.1105/tpc.113.116970] [Citation(s) in RCA: 113] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2013] [Revised: 10/11/2013] [Accepted: 10/22/2013] [Indexed: 05/18/2023]
Abstract
LIN-11, Isl1 and MEC-3 (LIM)-domain proteins play pivotal roles in a variety of cellular processes in animals, but plant LIM functions remain largely unexplored. Here, we demonstrate dual roles of the WLIM1a gene in fiber development in upland cotton (Gossypium hirsutum). WLIM1a is preferentially expressed during the elongation and secondary wall synthesis stages in developing fibers. Overexpression of WLIM1a in cotton led to significant changes in fiber length and secondary wall structure. Compared with the wild type, fibers of WLIM1a-overexpressing plants grew longer and formed a thinner and more compact secondary cell wall, which contributed to improved fiber strength and fineness. Functional studies demonstrated that (1) WLIM1a acts as an actin bundler to facilitate elongation of fiber cells and (2) WLIM1a also functions as a transcription factor to activate expression of Phe ammonia lyase-box genes involved in phenylpropanoid biosynthesis to build up the secondary cell wall. WLIM1a localizes in the cytosol and nucleus and moves into the nucleus in response to hydrogen peroxide. Taken together, these results demonstrate that WLIM1a has dual roles in cotton fiber development, elongation, and secondary wall formation. Moreover, our study shows that lignin/lignin-like phenolics may substantially affect cotton fiber quality; this finding may guide cotton breeding for improved fiber traits.
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Affiliation(s)
- Li-Bo Han
- Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China
- State Key Laboratory of Plant Genomics, Beijing 100101, China
| | - Yuan-Bao Li
- Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China
- State Key Laboratory of Plant Genomics, Beijing 100101, China
| | - Hai-Yun Wang
- Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China
- State Key Laboratory of Plant Genomics, Beijing 100101, China
| | - Xiao-Min Wu
- Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China
- State Key Laboratory of Plant Genomics, Beijing 100101, China
| | - Chun-Li Li
- Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China
| | - Ming Luo
- Biotechnology Research Center, Southwest University, Chongqing 404100, China
| | - Shen-Jie Wu
- Institute of Cotton, Shanxi Academy of Agricultural Sciences, Yuncheng 044000, China
| | - Zhao-Sheng Kong
- Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China
- State Key Laboratory of Plant Genomics, Beijing 100101, China
| | - Yan Pei
- Biotechnology Research Center, Southwest University, Chongqing 404100, China
| | - Gai-Li Jiao
- Institute of Cotton, Shanxi Academy of Agricultural Sciences, Yuncheng 044000, China
| | - Gui-Xian Xia
- Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China
- State Key Laboratory of Plant Genomics, Beijing 100101, China
- Address correspondence to
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Jia H, Li J, Zhu J, Fan T, Qian D, Zhou Y, Wang J, Ren H, Xiang Y, An L. Arabidopsis CROLIN1, a novel plant actin-binding protein, functions in cross-linking and stabilizing actin filaments. J Biol Chem 2013; 288:32277-32288. [PMID: 24072702 DOI: 10.1074/jbc.m113.483594] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Higher order actin filament structures are necessary for cytoplasmic streaming, organelle movement, and other physiological processes. However, the mechanism by which the higher order cytoskeleton is formed in plants remains unknown. In this study, we identified a novel actin-cross-linking protein family (named CROLIN) that is well conserved only in the plant kingdom. There are six isovariants of CROLIN in the Arabidopsis genome, with CROLIN1 specifically expressed in pollen. In vitro biochemical analyses showed that CROLIN1 is a novel actin-cross-linking protein with binding and stabilizing activities. Remarkably, CROLIN1 can cross-link actin bundles into actin networks. CROLIN1 loss of function induces pollen germination and pollen tube growth hypersensitive to latrunculin B. All of these results demonstrate that CROLIN1 may play an important role in stabilizing and remodeling actin filaments by binding to and cross-linking actin filaments.
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Affiliation(s)
- Honglei Jia
- From the Key Laboratory of Cell Activities and Stress Adaptations of the Ministry of Education, School of Life Sciences, Lanzhou University, Lanzhou 730000, China
| | - Jisheng Li
- From the Key Laboratory of Cell Activities and Stress Adaptations of the Ministry of Education, School of Life Sciences, Lanzhou University, Lanzhou 730000, China
| | - Jingen Zhu
- From the Key Laboratory of Cell Activities and Stress Adaptations of the Ministry of Education, School of Life Sciences, Lanzhou University, Lanzhou 730000, China
| | - Tingting Fan
- From the Key Laboratory of Cell Activities and Stress Adaptations of the Ministry of Education, School of Life Sciences, Lanzhou University, Lanzhou 730000, China
| | - Dong Qian
- From the Key Laboratory of Cell Activities and Stress Adaptations of the Ministry of Education, School of Life Sciences, Lanzhou University, Lanzhou 730000, China
| | - Yuelong Zhou
- From the Key Laboratory of Cell Activities and Stress Adaptations of the Ministry of Education, School of Life Sciences, Lanzhou University, Lanzhou 730000, China
| | - Jiaojiao Wang
- the Key Laboratory of Cell Proliferation and Regulation Biology of Ministry of Education and College of Life Science, Beijing Normal University, Beijing 100875, China
| | - Haiyun Ren
- the Key Laboratory of Cell Proliferation and Regulation Biology of Ministry of Education and College of Life Science, Beijing Normal University, Beijing 100875, China
| | - Yun Xiang
- From the Key Laboratory of Cell Activities and Stress Adaptations of the Ministry of Education, School of Life Sciences, Lanzhou University, Lanzhou 730000, China.
| | - Lizhe An
- From the Key Laboratory of Cell Activities and Stress Adaptations of the Ministry of Education, School of Life Sciences, Lanzhou University, Lanzhou 730000, China.
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28
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Thomas C. Bundling actin filaments from membranes: some novel players. FRONTIERS IN PLANT SCIENCE 2012; 3:188. [PMID: 22936939 PMCID: PMC3426786 DOI: 10.3389/fpls.2012.00188] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2012] [Accepted: 08/01/2012] [Indexed: 05/04/2023]
Abstract
Progress in live-cell imaging of the cytoskeleton has significantly extended our knowledge about the organization and dynamics of actin filaments near the plasma membrane of plant cells. Noticeably, two populations of filamentous structures can be distinguished. On the one hand, fine actin filaments which exhibit an extremely dynamic behavior basically characterized by fast polymerization and prolific severing events, a process referred to as actin stochastic dynamics. On the other hand, thick actin bundles which are composed of several filaments and which are comparatively more stable although they constantly remodel as well. There is evidence that the actin cytoskeleton plays critical roles in trafficking and signaling at both the cell cortex and organelle periphery but the exact contribution of actin bundles remains unclear. A common view is that actin bundles provide the long-distance tracks used by myosin motors to deliver their cargo to growing regions and accordingly play a particularly important role in cell polarization. However, several studies support that actin bundles are more than simple passive highways and display multiple and dynamic roles in the regulation of many processes, such as cell elongation, polar auxin transport, stomatal and chloroplast movement, and defense against pathogens. The list of identified plant actin-bundling proteins is ever expanding, supporting that plant cells shape structurally and functionally different actin bundles. Here I review the most recently characterized actin-bundling proteins, with a particular focus on those potentially relevant to membrane trafficking and/or signaling.
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Affiliation(s)
- Clément Thomas
- Laboratory of Molecular and Cellular Oncology, Department of Oncology, Public Research Centre for Health (CRP-Santé)Luxembourg, Luxembourg
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