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Nelwamondo AM, Kaningini AG, Ngmenzuma TYA, Maseko ST, Maaza M, Mohale KC. Biosynthesis of magnesium oxide and calcium carbonate nanoparticles using Moringa oleifera extract and their effectiveness on the growth, yield and photosynthetic performance of groundnut ( Arachis hypogaea L.) genotypes. Heliyon 2023; 9:e19419. [PMID: 37662830 PMCID: PMC10472070 DOI: 10.1016/j.heliyon.2023.e19419] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2023] [Revised: 08/17/2023] [Accepted: 08/22/2023] [Indexed: 09/05/2023] Open
Abstract
Small-scale crop production has been significantly impacted by the heavy price, limited supply, and frequent shortage of inorganic fertilisers, which is partly attributable to the Covid-19 pandemic outbreak and led to rising oil and food prices. Thus, integrating environmentally friendly agricultural practices that can improve crop productivity and advance the sustainability of agricultural cropping systems is critical. This study synthesized and characterised MgO and CaCO3Moringa oleifera nanoparticles and assessed their effects on groundnut genotypes. The effect of biosynthesized MgO and CaCO3 nanoparticles using Moringa oleifera extract on the growth and yield of groundnut genotypes exposed to different concentrations of 50, 100 and 200 mg/L was examined. The experiment was carried laid out in a 3 × 8 factorial completely randomized design (CRD) with eight replicates per treatment. Each plant was sprayed with 5 ml of the solution crystalline size of the MgO and CaCO3 nanoparticles 2.48 nm and 10.30 nm, respectively. Foliar application of nanoparticle treatments was applied weekly except for the negative control. The collected data were subjected to a two-way analysis of variance (ANOVA). Mean separations were done using Tukey's Honest Significant Difference (HSD) at P < 0.05. The findings demonstrated that foliar application of MgO and CaCO3 nanoparticles positively affected groundnut biomass production. The results further revealed that the concentration of 50 mg/L of MgO and 100 mg/L of CaCO3 considerably improved groundnut plant growth, yield, and nodulation in comparison with other treatments. There is a great deal of evidence signifying that foliar applications of 50 mg/L of MgO 100 mg/L CaCO3 contributed greatly to plant growth and crop production. Therefore, 50 mg/L of MgO and 100 mg/L CaCO3 nanoparticles foliar application could be recommended as nano-fertilisers application rate for groundnut production.
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Affiliation(s)
- Aluwani Mutanwa Nelwamondo
- Department of Agriculture and Animal Health, College of Agriculture and Environmental Sciences, University of South Africa, Private Bag X6, Florida, 1710, South Africa
| | - Amani Gabriel Kaningini
- Department of Agriculture and Animal Health, College of Agriculture and Environmental Sciences, University of South Africa, Private Bag X6, Florida, 1710, South Africa
- UNESCO-UNISA Africa Chair in Nanoscience and Nanotechnology College of Graduates Studies, University of South Africa, Muckleneuk Ridge, PO Box 392, Pretoria, 0002, South Africa
| | | | - Sipho Thulani Maseko
- Department of Agriculture and Animal Health, College of Agriculture and Environmental Sciences, University of South Africa, Private Bag X6, Florida, 1710, South Africa
| | - Malik Maaza
- UNESCO-UNISA Africa Chair in Nanoscience and Nanotechnology College of Graduates Studies, University of South Africa, Muckleneuk Ridge, PO Box 392, Pretoria, 0002, South Africa
- Nanosciences African Network (NANOAFNET), iThemba LABS-National Research Foundation, 1 Old Faure Road, PO Box 722, Somerset West, 7129, Western Cape, South Africa
| | - Keletso Cecilia Mohale
- Department of Agriculture and Animal Health, College of Agriculture and Environmental Sciences, University of South Africa, Private Bag X6, Florida, 1710, South Africa
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Schmitter C, Di-Luoffo M, Guillermet-Guibert J. Transducing compressive forces into cellular outputs in cancer and beyond. Life Sci Alliance 2023; 6:e202201862. [PMID: 37364915 PMCID: PMC10292664 DOI: 10.26508/lsa.202201862] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Revised: 06/13/2023] [Accepted: 06/13/2023] [Indexed: 06/28/2023] Open
Abstract
In living organisms, cells sense mechanical forces (shearing, tensile, and compressive) and respond to those physical cues through a process called mechanotransduction. This process includes the simultaneous activation of biochemical signaling pathways. Recent studies mostly on human cells revealed that compressive forces selectively modulate a wide range of cell behavior, both in compressed and in neighboring less compressed cells. Besides participating in tissue homeostasis such as bone healing, compression is also involved in pathologies, including intervertebral disc degeneration or solid cancers. In this review, we will summarize the current scattered knowledge of compression-induced cell signaling pathways and their subsequent cellular outputs, both in physiological and pathological conditions, such as solid cancers.
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Affiliation(s)
- Céline Schmitter
- CRCT, Université de Toulouse, Inserm, CNRS, Université Toulouse-III Paul Sabatier, Centre de Recherches en Cancérologie de Toulouse, Toulouse, France
- Labex Toucan, Toulouse, France
- Master de Biologie, Ecole Normale Supérieure de Lyon, Université Claude Bernard Lyon 1, Université de Lyon, Lyon, France
| | - Mickaël Di-Luoffo
- CRCT, Université de Toulouse, Inserm, CNRS, Université Toulouse-III Paul Sabatier, Centre de Recherches en Cancérologie de Toulouse, Toulouse, France
- Labex Toucan, Toulouse, France
| | - Julie Guillermet-Guibert
- CRCT, Université de Toulouse, Inserm, CNRS, Université Toulouse-III Paul Sabatier, Centre de Recherches en Cancérologie de Toulouse, Toulouse, France
- Labex Toucan, Toulouse, France
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3
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Huang S, Jia A, Ma S, Sun Y, Chang X, Han Z, Chai J. NLR signaling in plants: from resistosomes to second messengers. Trends Biochem Sci 2023; 48:776-787. [PMID: 37394345 DOI: 10.1016/j.tibs.2023.06.002] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2023] [Revised: 05/31/2023] [Accepted: 06/02/2023] [Indexed: 07/04/2023]
Abstract
Nucleotide binding and leucine-rich repeat-containing receptors (NLRs) have a critical role in plant immunity through direct or indirect recognition of pathogen effectors. Recent studies have demonstrated that such recognition induces formation of large protein complexes called resistosomes to mediate NLR immune signaling. Some NLR resistosomes activate Ca2+ influx by acting as Ca2+-permeable channels, whereas others function as active NADases to catalyze the production of nucleotide-derived second messengers. In this review we summarize these studies on pathogen effector-induced assembly of NLR resistosomes and resistosome-mediated production of the second messengers of Ca2+ and nucleotide derivatives. We also discuss downstream events and regulation of resistosome signaling.
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Affiliation(s)
- Shijia Huang
- Beijing Frontier Research Center for Biological Structure, Beijing Advanced Innovation Center for Structural Biology, Center for Plant Biology, Tsinghua University, Beijing 100084, China
| | - Aolin Jia
- Beijing Frontier Research Center for Biological Structure, Beijing Advanced Innovation Center for Structural Biology, Center for Plant Biology, Tsinghua University, Beijing 100084, China
| | - Shoucai Ma
- Beijing Frontier Research Center for Biological Structure, Beijing Advanced Innovation Center for Structural Biology, Center for Plant Biology, Tsinghua University, Beijing 100084, China
| | - Yue Sun
- Beijing Frontier Research Center for Biological Structure, Beijing Advanced Innovation Center for Structural Biology, Center for Plant Biology, Tsinghua University, Beijing 100084, China
| | - Xiaoyu Chang
- Beijing Frontier Research Center for Biological Structure, Beijing Advanced Innovation Center for Structural Biology, Center for Plant Biology, Tsinghua University, Beijing 100084, China
| | - Zhifu Han
- Beijing Frontier Research Center for Biological Structure, Beijing Advanced Innovation Center for Structural Biology, Center for Plant Biology, Tsinghua University, Beijing 100084, China
| | - Jijie Chai
- Beijing Frontier Research Center for Biological Structure, Beijing Advanced Innovation Center for Structural Biology, Center for Plant Biology, Tsinghua University, Beijing 100084, China; Institute of Biochemistry, University of Cologne, Cologne 50674, Germany; Max Planck Institute for Plant Breeding Research, Department of Plant-Microbe Interactions, Cologne 50829, Germany; School of Life Sciences, Westlake University, Institute of Biology, Westlake Institute for Advanced Study, Hangzhou 310024, Zhejiang, China.
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4
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Wang J, Song W, Chai J. Structure, biochemical function, and signaling mechanism of plant NLRs. MOLECULAR PLANT 2023; 16:75-95. [PMID: 36415130 DOI: 10.1016/j.molp.2022.11.011] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2022] [Revised: 11/07/2022] [Accepted: 11/21/2022] [Indexed: 06/16/2023]
Abstract
To counter pathogen invasion, plants have evolved a large number of immune receptors, including membrane-resident pattern recognition receptors (PRRs) and intracellular nucleotide-binding and leucine-rich repeat receptors (NLRs). Our knowledge about PRR and NLR signaling mechanisms has expanded significantly over the past few years. Plant NLRs form multi-protein complexes called resistosomes in response to pathogen effectors, and the signaling mediated by NLR resistosomes converges on Ca2+-permeable channels. Ca2+-permeable channels important for PRR signaling have also been identified. These findings highlight a crucial role of Ca2+ in triggering plant immune signaling. In this review, we first discuss the structural and biochemical mechanisms of non-canonical NLR Ca2+ channels and then summarize our knowledge about immune-related Ca2+-permeable channels and their roles in PRR and NLR signaling. We also discuss the potential role of Ca2+ in the intricate interaction between PRR and NLR signaling.
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Affiliation(s)
- Jizong Wang
- State Key Laboratory of Protein and Plant Gene Research, School of Advanced Agricultural Sciences, Peking University, Beijing 100871, China; Peking University Institute of Advanced Agricultural Sciences, Shandong Laboratory of Advanced Agricultural Sciences at Weifang, Weifang, Shandong 261000, China.
| | - Wen Song
- Institute of Biochemistry, University of Cologne, 50674 Cologne, Germany; Max Planck Institute for Plant Breeding Research, 50829 Cologne, Germany.
| | - Jijie Chai
- Tsinghua-Peking Joint Center for Life Sciences, Center for Plant Biology, School of Life Sciences, Tsinghua University, Beijing 100084, China; Institute of Biochemistry, University of Cologne, 50674 Cologne, Germany; Max Planck Institute for Plant Breeding Research, 50829 Cologne, Germany.
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Codjoe JM, Miller K, Haswell ES. Plant cell mechanobiology: Greater than the sum of its parts. THE PLANT CELL 2022; 34:129-145. [PMID: 34524447 PMCID: PMC8773992 DOI: 10.1093/plcell/koab230] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Accepted: 09/09/2021] [Indexed: 05/04/2023]
Abstract
The ability to sense and respond to physical forces is critical for the proper function of cells, tissues, and organisms across the evolutionary tree. Plants sense gravity, osmotic conditions, pathogen invasion, wind, and the presence of barriers in the soil, and dynamically integrate internal and external stimuli during every stage of growth and development. While the field of plant mechanobiology is growing, much is still poorly understood-including the interplay between mechanical and biochemical information at the single-cell level. In this review, we provide an overview of the mechanical properties of three main components of the plant cell and the mechanoperceptive pathways that link them, with an emphasis on areas of complexity and interaction. We discuss the concept of mechanical homeostasis, or "mechanostasis," and examine the ways in which cellular structures and pathways serve to maintain it. We argue that viewing mechanics and mechanotransduction as emergent properties of the plant cell can be a useful conceptual framework for synthesizing current knowledge and driving future research.
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Affiliation(s)
- Jennette M Codjoe
- Department of Biology and Center for Engineering Mechanobiology, Washington University in St Louis, St Louis, Missouri, 63130, USA
| | - Kari Miller
- Department of Biology and Center for Engineering Mechanobiology, Washington University in St Louis, St Louis, Missouri, 63130, USA
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Kansal S, Panwar V, Mutum RD, Raghuvanshi S. Investigations on Regulation of MicroRNAs in Rice Reveal [Ca 2+] cyt Signal Transduction Regulated MicroRNAs. FRONTIERS IN PLANT SCIENCE 2021; 12:720009. [PMID: 34733300 PMCID: PMC8558223 DOI: 10.3389/fpls.2021.720009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/03/2021] [Accepted: 09/15/2021] [Indexed: 06/13/2023]
Abstract
MicroRNAs (miRNAs) are critical components of the multidimensional regulatory networks in eukaryotic systems. Given their diverse spectrum of function, it is apparent that the transcription, processing, and activity of the miRNAs themselves, is very dynamically regulated. One of the most important and universally implicated signaling molecules is [Ca2+]cyt. It is known to regulate a plethora of developmental and metabolic processes in both plants and animals; however, its impact on the regulation of miRNA expression is relatively less explored. The current study employed a combination of internal and external calcium channel inhibitors to establishing that [Ca2+]cyt signatures actively regulate miRNA expression in rice. Involvement of [Ca2+]cyt in the regulation of miRNA expression was further confirmed by treatment with calcimycin, the calcium ionophore. Modulation of the cytosolic calcium levels was also found to regulate the drought-responsive expression as well as ABA-mediated response of miRNA genes in rice seedlings. The study further establishes the role of calmodulins and Calmodulin-binding Transcription Activators (CAMTAs) as important components of the signal transduction schema that regulates miRNA expression. Yeast one-hybrid assay established that OsCAMTA4 & 6 are involved in the transcriptional regulation of miR156a and miR167h. Thus, the study was able to establish that [Ca2+]cyt is actively involved in regulating the expression of miRNA genes both under control and stress conditions.
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Helliwell KE, Kleiner FH, Hardstaff H, Chrachri A, Gaikwad T, Salmon D, Smirnoff N, Wheeler GL, Brownlee C. Spatiotemporal patterns of intracellular Ca 2+ signalling govern hypo-osmotic stress resilience in marine diatoms. THE NEW PHYTOLOGIST 2021; 230:155-170. [PMID: 33486789 DOI: 10.1111/nph.17162] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2020] [Accepted: 12/11/2020] [Indexed: 05/15/2023]
Abstract
Diatoms are globally important phytoplankton that dominate coastal and polar-ice assemblages. These environments exhibit substantial changes in salinity over dynamic spatiotemporal regimes. Rapid sensory systems are vital to mitigate the harmful consequences of osmotic stress. Population-based analyses have suggested that Ca2+ signalling is involved in diatom osmotic sensing. However, mechanistic insight of the role of osmotic Ca2+ signalling is limited. Here, we show that Phaeodactylum Ca2+ elevations are essential for surviving hypo-osmotic shock. Moreover, employing novel single-cell imaging techniques we have characterised real-time Ca2+ signalling responses in single diatom cells to environmental osmotic perturbations. We observe that intracellular spatiotemporal patterns of osmotic-induced Ca2+ elevations encode vital information regarding the nature of the osmotic stimulus. Localised Ca2+ signals evoked by mild or gradual hypo-osmotic shocks are propagated globally from the apical cell tips, enabling fine-tuned cell volume regulation across the whole cell. Finally, we demonstrate that diatoms adopt Ca2+ -independent and dependent mechanisms for osmoregulation. We find that efflux of organic osmolytes occurs in a Ca2+ -independent manner, but this response is insufficient to mitigate cell damage during hypo-osmotic shock. By comparison, Ca2+ -dependent signalling is necessary to prevent cell bursting via precise coordination of K+ transport, and therefore is likely to underpin survival in dynamic osmotic environments.
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Affiliation(s)
- Katherine E Helliwell
- The Laboratory, Marine Biological Association, Citadel Hill, Plymouth, PL1 2PB, UK
- Biosciences, College of Life and Environmental Sciences, University of Exeter, Exeter, EX4 4QD, UK
| | - Friedrich H Kleiner
- The Laboratory, Marine Biological Association, Citadel Hill, Plymouth, PL1 2PB, UK
- School of Ocean and Earth Science, University of Southampton, Southampton, SO14 3ZH, UK
| | - Hayley Hardstaff
- The Laboratory, Marine Biological Association, Citadel Hill, Plymouth, PL1 2PB, UK
| | - Abdul Chrachri
- The Laboratory, Marine Biological Association, Citadel Hill, Plymouth, PL1 2PB, UK
| | - Trupti Gaikwad
- The Laboratory, Marine Biological Association, Citadel Hill, Plymouth, PL1 2PB, UK
| | - Deborah Salmon
- Biosciences, College of Life and Environmental Sciences, University of Exeter, Exeter, EX4 4QD, UK
| | - Nicholas Smirnoff
- Biosciences, College of Life and Environmental Sciences, University of Exeter, Exeter, EX4 4QD, UK
| | - Glen L Wheeler
- The Laboratory, Marine Biological Association, Citadel Hill, Plymouth, PL1 2PB, UK
| | - Colin Brownlee
- The Laboratory, Marine Biological Association, Citadel Hill, Plymouth, PL1 2PB, UK
- School of Ocean and Earth Science, University of Southampton, Southampton, SO14 3ZH, UK
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Noman M, Aysha J, Ketehouli T, Yang J, Du L, Wang F, Li H. Calmodulin binding transcription activators: An interplay between calcium signalling and plant stress tolerance. JOURNAL OF PLANT PHYSIOLOGY 2021; 256:153327. [PMID: 33302232 DOI: 10.1016/j.jplph.2020.153327] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2020] [Revised: 11/13/2020] [Accepted: 11/15/2020] [Indexed: 05/18/2023]
Abstract
In plants, next to the secondary messengers lies an array of signal relaying molecules among which Calmodulins convey the unequivocal alarms of calcium influxes to Calmodulin-Binding Transcription Activators (CAMTA). Upon reception, CAMTA transcription factors decode the calcium signatures by transcribing the genes corresponding to the specific stimulus, thus have direct/indirect engagement in the complex signalling crosstalk. CAMTA transcription factors make an important contribution to the genome of all eukaryotes, including plants, from Brassica napus (18) to Carica papaya (2), the number of CAMTA genes varies across the plant species, however they exhibit a similar evolutionarily conserved domain organization including a DNA-Binding Domain (CG-1), a Transcription Factor Immunoglobulin Binding Domain (TIG), a Calmodulin-Binding Domain (CaMBD/IQ) and several Ankyrin repeats. The regulatory region of CAMTA genes possess multiple stress-responsive cis motifs including ABRE, SARE, G-box, W-box, AuXRE, DRE and others. CAMTA TFs in Arabidopsis have been studied extensively, however in other plants (with a few exceptions), the evidence merely bases upon expression analyses. CAMTAs are reported to orchestrate biotic as well as abiotic stresses including those occurring due to water and temperature fluctuations as well as heavy metals, light and salinity. Through CG-1 domain, CAMTA TFs bind the CG-box in the promoter of their target genes and modulate their expression under adverse conditions. Here we present a glimpse of how calcium signatures are coded and decoded and translated into necessary responses. In addition, we have emphasized on exploitation of the multiple-stress responsive nature of CAMTAs in engineering plants with desired traits.
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Affiliation(s)
- Muhammad Noman
- College of Life Sciences, Engineering Research Centre of the Chinese Ministry of Education for Bioreactor and Pharmaceutical Development, Jilin Agricultural University, 2888 Xincheng Street, Changchun, Jilin Province 130118, PR China.
| | - Jameel Aysha
- College of Life Sciences, Engineering Research Centre of the Chinese Ministry of Education for Bioreactor and Pharmaceutical Development, Jilin Agricultural University, 2888 Xincheng Street, Changchun, Jilin Province 130118, PR China
| | - Toi Ketehouli
- College of Life Sciences, Engineering Research Centre of the Chinese Ministry of Education for Bioreactor and Pharmaceutical Development, Jilin Agricultural University, 2888 Xincheng Street, Changchun, Jilin Province 130118, PR China
| | - Jing Yang
- College of Life Sciences, Engineering Research Centre of the Chinese Ministry of Education for Bioreactor and Pharmaceutical Development, Jilin Agricultural University, 2888 Xincheng Street, Changchun, Jilin Province 130118, PR China
| | - Linna Du
- College of Life Sciences, Engineering Research Centre of the Chinese Ministry of Education for Bioreactor and Pharmaceutical Development, Jilin Agricultural University, 2888 Xincheng Street, Changchun, Jilin Province 130118, PR China
| | - Fawei Wang
- College of Life Sciences, Engineering Research Centre of the Chinese Ministry of Education for Bioreactor and Pharmaceutical Development, Jilin Agricultural University, 2888 Xincheng Street, Changchun, Jilin Province 130118, PR China
| | - Haiyan Li
- College of Tropical Crops, Hainan University, 570228, Haikou, China.
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Basu D, Haswell ES. The Mechanosensitive Ion Channel MSL10 Potentiates Responses to Cell Swelling in Arabidopsis Seedlings. Curr Biol 2020; 30:2716-2728.e6. [PMID: 32531281 DOI: 10.1016/j.cub.2020.05.015] [Citation(s) in RCA: 46] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2020] [Revised: 05/01/2020] [Accepted: 05/05/2020] [Indexed: 01/06/2023]
Abstract
The ability to respond to unanticipated increases in volume is a fundamental property of cells, essential for cellular integrity in the face of osmotic challenges. Plants must manage cell swelling during flooding, rehydration, and pathogen invasion-but little is known about the mechanisms by which this occurs. It has been proposed that plant cells could sense and respond to cell swelling through the action of mechanosensitive ion channels. Here, we characterize a new assay to study the effects of cell swelling on Arabidopsis thaliana seedlings and to test the contributions of the mechanosensitive ion channel MscS-like10 (MSL10). The assay incorporates both cell wall softening and hypo-osmotic treatment to induce cell swelling. We show that MSL10 is required for several previously demonstrated responses to hypo-osmotic shock, including a cytoplasmic calcium transient within the first few seconds, accumulation of ROS within the first 30 min, and increased transcript levels of mechano-inducible genes within 60 min. We also show that cell swelling induces programmed cell death within 3 h in a MSL10-dependent manner. Finally, we show that MSL10 is unable to potentiate cell swelling-induced death when phosphomimetic residues are introduced into its soluble N terminus. Thus, MSL10 functions as a phospho-regulated membrane-based sensor that connects the perception of cell swelling to a downstream signaling cascade and programmed cell death.
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Affiliation(s)
- Debarati Basu
- NSF Center for Engineering Mechanobiology, Department of Biology, Washington University in St. Louis, St. Louis, MO 63130, USA
| | - Elizabeth S Haswell
- NSF Center for Engineering Mechanobiology, Department of Biology, Washington University in St. Louis, St. Louis, MO 63130, USA.
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A Ca 2+/CaM-regulated transcriptional switch modulates stomatal development in response to water deficit. Sci Rep 2019; 9:12282. [PMID: 31439865 PMCID: PMC6706580 DOI: 10.1038/s41598-019-47529-2] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2018] [Accepted: 07/09/2019] [Indexed: 02/01/2023] Open
Abstract
Calcium (Ca2+) signals are decoded by the Ca2+-sensor protein calmodulin (CaM) and are transduced to Ca2+/CaM-binding transcription factors to directly regulate gene expression necessary for acclimation responses in plants. The molecular mechanisms of Ca2+/CaM signal transduction processes and their functional significance remains enigmatic. Here we report a novel Ca2+/CaM signal transduction mechanism that allosterically regulates DNA-binding activity of GT2-LIKE 1 (GTL1), a transrepressor of STOMATAL DENSITY AND DISTRIBUTION 1 (SDD1), to repress stomatal development in response to water stress. We demonstrated that Ca2+/CaM interaction with the 2nd helix of the GTL1 N-terminal trihelix DNA-binding domain (GTL1N) destabilizes a hydrophobic core of GTL1N and allosterically inhibits 3rd helix docking to the SDD1 promoter, leading to osmotic stress-induced Ca2+/CaM-dependent activation (de-repression) of SDD1 expression. This resulted in GTL1-dependent repression of stomatal development in response to water-deficit stress. Together, our results demonstrate that a Ca2+/CaM-regulated transcriptional switch on a trihelix transrepressor directly transduces osmotic stress to repress stomatal development to improve plant water-use efficiency as an acclimation response.
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Nguyen HTH, Bouteau F, Mazars C, Kuse M, Kawano T. Enhanced elevations of hypo-osmotic shock-induced cytosolic and nucleic calcium concentrations in tobacco cells by pretreatment with dimethyl sulfoxide. Biosci Biotechnol Biochem 2019; 83:318-321. [PMID: 30345896 DOI: 10.1080/09168451.2018.1533801] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2018] [Accepted: 08/10/2018] [Indexed: 10/28/2022]
Abstract
Dimethyl sulfoxide (DMSO) is a dipolar aprotic solvent widely used in biological assays. Here, we observed that DMSO enhanced the hypo-osmotically induced increases in the concentration of Ca2+ in cytosolic and nucleic compartments in the transgenic cell-lines of tobacco (BY-2) expressing aequorin.
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Affiliation(s)
- Hieu T H Nguyen
- a International Photosynthesis Industrialization Research Center, Faculty and Graduate School of Environmental Engineering , The University of Kitakyushu , Kitakyushu , Japan
| | - François Bouteau
- b Université Paris Diderot, Sorbonne Paris Cité , Laboratoire Interdisciplinaire des Energies de Demain , Paris , France
- c LINV Kitakyushu Research Cente , University of Florence , Kitakyushu , Japan
| | - Christian Mazars
- d Laboratoire de Recherches en Sciences Végétales , Université de Toulouse UPS , Castanet-Tolosan , France
| | - Masaki Kuse
- e Laboratory of Natural Products Chemistry , Graduate School of Agricultural Science, Kobe University , Kobe , Japan
| | - Tomonori Kawano
- a International Photosynthesis Industrialization Research Center, Faculty and Graduate School of Environmental Engineering , The University of Kitakyushu , Kitakyushu , Japan
- b Université Paris Diderot, Sorbonne Paris Cité , Laboratoire Interdisciplinaire des Energies de Demain , Paris , France
- c LINV Kitakyushu Research Cente , University of Florence , Kitakyushu , Japan
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Nguyen HTH, Bouteau F, Mazars C, Kuse M, Kawano T. The involvement of calmodulin and protein kinases in the upstream of cytosolic and nucleic calcium signaling induced by hypoosmotic shock in tobacco cells. PLANT SIGNALING & BEHAVIOR 2018; 13:e1494467. [PMID: 30067454 PMCID: PMC6149468 DOI: 10.1080/15592324.2018.1494467] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2018] [Accepted: 06/19/2018] [Indexed: 05/21/2023]
Abstract
Changes in Ca2+ concentrations in cytosol ([Ca2+]C) or nucleus ([Ca2+]N) may play some vital roles in plants under hypoosmotic shock (Hypo-OS). Here, we observed that Hypo-OS induces biphasic increases in [Ca2+]C and [Ca2+]N in two tobacco cell lines (BY-2) expressing apoaequorin either in the cytosol or in the nucleus. Both [Ca2+]C and [Ca2+]N were sensitively modulated by the inhibitors of calmodulin and protein kinases, supporting the view that calmodulin suppresses the 1st peaks and and protein kinases enhance 2nd peaks in [Ca2+]C and [Ca2+]N. Data also suggested that the 1st and 2nd events depend on the internal and extracellular Ca2+ sources, respectively.
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Affiliation(s)
- H. T. H. Nguyen
- Laboratory of Chemical Biology and Bioengineering, Faculty and Graduate School of Environmental Engineering, The University of Kitakyushu, Kitakyushu, Japan
| | - F. Bouteau
- Sorbonne Paris Cité, Laboratoire Interdisciplinaire des Energies de Demain, Université Paris Diderot, Paris, France
- University of Florence LINV Kitakyushu Research Center (LINV@Kitakyushu), Kitakyushu, Japan
- International Photosynthesis Industrialization Research Center, The University of Kitakyushu, Kitakyushu, Japan
| | - C. Mazars
- Laboratoire de Recherches en Sciences Végétales, Université de Toulouse UPS, CNRS UMR, Castanet-Tolosan, France
| | - M. Kuse
- Laboratory of Natural Products Chemistry, Graduate School of Agricultural Science, Kobe University, Kobe, Japan
| | - T. Kawano
- Laboratory of Chemical Biology and Bioengineering, Faculty and Graduate School of Environmental Engineering, The University of Kitakyushu, Kitakyushu, Japan
- University of Florence LINV Kitakyushu Research Center (LINV@Kitakyushu), Kitakyushu, Japan
- International Photosynthesis Industrialization Research Center, The University of Kitakyushu, Kitakyushu, Japan
- Univ. Paris-Diderot, Sorbonne Paris Cité, Paris Interdisciplinary Energy Research Institute (PIERI), Paris, France
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Li Y, Li Q, Hong Q, Lin Y, Mao W, Zhou S. Reactive oxygen species triggering systemic programmed cell death process via elevation of nuclear calcium ion level in tomatoes resisting tobacco mosaic virus. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2018; 270:166-175. [PMID: 29576070 DOI: 10.1016/j.plantsci.2018.02.010] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2017] [Revised: 02/08/2018] [Accepted: 02/10/2018] [Indexed: 05/26/2023]
Abstract
Programmed cell death (PCD) plays a positive role in the systemic response of plants to pathogen resistance. It has been confirmed that local tobacco mosaic virus (TMV) infecting tomato leaves can induce systemic PCD process in root-tip tissues. But up to now the underlying physiological mechanisms are poorly understood. This study focused on the detailed investigation of the physiological responses of root-tip cells during the initiation of systemic PCD. Physiological, biochemical examination and cytological observation showed that 1 day post-inoculation (dpi) of TMV inoculation there was an increase in calcium fluorescence intensity in root tip tissue cells. Then at 2 dpi, 4 dpi, 8 dpi and 15 dpi, the fluorescence intensity of calcium ion continued to increase. However, at 5 dpi, the reactive oxygen species (ROS) began to accumulate in the root-tip cells. And finally at 20 dpi, the obvious PCD reaction was detected. In addition, the experimental results also showed that the above process involved the elevation of two types of intracellular Ca2+, including cytoplasmic calcium ([Ca2+]cyt) and nuclear calcium ([Ca2+]nuc). The [Ca2+]cyt, as a pilot signal could lead to the subsequent elevation of intracellular ROS concentration. Then, the high levels of ROS stimulated an increase of [Ca2+]nuc and eventually caused PCD reactions in the root-tip tissues. In particular, the high level of nuclear calcium is an essential mediator in systemic PCD of plants.
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Affiliation(s)
- Yang Li
- Lab of Plant Cell Biology, Shanghai Key Laboratory of Bio-Energy Crops, School of Life Sciences, Shanghai University, Shanghai, China
| | - Qi Li
- Lab of Plant Cell Biology, Shanghai Key Laboratory of Bio-Energy Crops, School of Life Sciences, Shanghai University, Shanghai, China; Unit of Herpesvirus and Molecular Virology, Key Laboratory of Molecular Virology & Immunology, Institut Pasteur of Shanghai Chinese Academy of Sciences, Shanghai, China
| | - Qiang Hong
- Lab of Plant Cell Biology, Shanghai Key Laboratory of Bio-Energy Crops, School of Life Sciences, Shanghai University, Shanghai, China
| | - Yichun Lin
- Lab of Plant Cell Biology, Shanghai Key Laboratory of Bio-Energy Crops, School of Life Sciences, Shanghai University, Shanghai, China
| | - Wang Mao
- College of Biology, China Agriculture University, Beijing, China.
| | - Shumin Zhou
- Lab of Plant Cell Biology, Shanghai Key Laboratory of Bio-Energy Crops, School of Life Sciences, Shanghai University, Shanghai, China.
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Charpentier M. Calcium Signals in the Plant Nucleus: Origin and Function. JOURNAL OF EXPERIMENTAL BOTANY 2018; 69:4986421. [PMID: 29718301 DOI: 10.1093/jxb/ery160] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2018] [Indexed: 06/08/2023]
Abstract
The universality of calcium as an intracellular messenger depends on the dynamics of its spatial and temporal release from calcium stores. Accumulating evidence over the past two decades supports an essential role for nuclear calcium signalling in the transduction of specific stimuli into cellular responses. This review focusses on mechanisms underpinning changes in nuclear calcium concentrations and discusses what is known so far, about the origin of the nuclear calcium signals identified, primarily in the context of microbial symbioses and abiotic stresses.
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Affiliation(s)
- Myriam Charpentier
- John Innes Centre, Department of Cell and developmental Biology, Colney Lane, Norwich, UK
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15
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Huang F, Luo J, Ning T, Cao W, Jin X, Zhao H, Wang Y, Han S. Cytosolic and Nucleosolic Calcium Signaling in Response to Osmotic and Salt Stresses Are Independent of Each Other in Roots of Arabidopsis Seedlings. FRONTIERS IN PLANT SCIENCE 2017; 8:1648. [PMID: 28983313 PMCID: PMC5613247 DOI: 10.3389/fpls.2017.01648] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2017] [Accepted: 09/07/2017] [Indexed: 05/02/2023]
Abstract
Calcium acts as a universal second messenger in both developmental processes and responses to environmental stresses. Previous research has shown that a number of stimuli can induce [Ca2+] increases in both the cytoplasm and nucleus in plants. However, the relationship between cytosolic and nucleosolic calcium signaling remains obscure. Here, we generated transgenic plants containing a fusion protein, comprising rat parvalbumin (PV) with either a nuclear export sequence (PV-NES) or a nuclear localization sequence (NLS-PV), to selectively buffer the cytosolic or nucleosolic calcium. Firstly, we found that the osmotic stress-induced cytosolic [Ca2+] increase (OICIcyt) and the salt stress-induced cytosolic [Ca2+] increase (SICIcyt) were impaired in the PV-NES lines compared with the Arabidopsis wildtype (WT). Similarly, the osmotic stress-induced nucleosolic [Ca2+] increase (OICInuc) and salt stress-induced nucleosolic [Ca2+] increase (SICInuc) were also disrupted in the NLS-PV lines. These results indicate that PV can effectively buffer the increase of [Ca2+] in response to various stimuli in Arabidopsis. However, the OICIcyt and SICIcyt in the NLS-PV plants were similar to those in the WT, and the OICInuc and SICInuc in the PV-NES plants were also same as those in the WT, suggesting that the cytosolic and nucleosolic calcium dynamics are mutually independent. Furthermore, we found that osmotic stress- and salt stress-inhibited root growth was reduced dramatically in the PV-NES and NLS-PV lines, while the osmotic stress-induced increase of the lateral root primordia was higher in the PV-NES plants than either the WT or NLS-PV plants. In addition, several stress-responsive genes, namely CML37, DREB2A, MYB2, RD29A, and RD29B, displayed diverse expression patterns in response to osmotic and salt stress in the PV-NES and NLS-PV lines when compared with the WT. Together, these results imply that the cytosolic and nucleosolic calcium signaling coexist to play the pivotal roles in the growth and development of plants and their responses to environment stresses.
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16
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Testard A, Da Silva D, Ormancey M, Pichereaux C, Pouzet C, Jauneau A, Grat S, Robe E, Brière C, Cotelle V, Mazars C, Thuleau P. Calcium- and Nitric Oxide-Dependent Nuclear Accumulation of Cytosolic Glyceraldehyde-3-Phosphate Dehydrogenase in Response to Long Chain Bases in Tobacco BY-2 Cells. PLANT & CELL PHYSIOLOGY 2016; 57:2221-2231. [PMID: 27585463 DOI: 10.1093/pcp/pcw137] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2016] [Accepted: 07/31/2016] [Indexed: 05/03/2023]
Abstract
Sphinganine or dihydrosphingosine (d18:0, DHS), one of the most abundant free sphingoid long chain bases (LCBs) in plants, is known to induce a calcium-dependent programmed cell death (PCD) in plants. In addition, in tobacco BY-2 cells, it has been shown that DHS triggers a rapid production of H2O2 and nitric oxide (NO). Recently, in analogy to what is known in the animal field, plant cytosolic glyceraldehyde-3-phosphate dehydrogenase (GAPC), a ubiquitous enzyme involved in glycolysis, has been suggested to fulfill other functions associated with its oxidative post-translational modifications such as S-nitrosylation on cysteine residues. In particular, in mammals, stress signals inducing NO production promote S-nitrosylation of GAPC and its subsequent translocation into the nucleus where the protein participates in the establishment of apoptosis. In the present study, we investigated the behavior of GAPC in tobacco BY-2 cells treated with DHS. We found that upon DHS treatment, an S-nitrosylated form of GAPC accumulated in the nucleus. This accumulation was dependent on NO production. Two genes encoding GAPCs, namely Nt(BY-2)GAPC1 and Nt(BY-2)GAPC2, were cloned. Transient overexpression of Nt(BY-2)GAPC-green fluorescent protein (GFP) chimeric constructs indicated that both proteins localized in the cytoplasm as well as in the nucleus. Mutating into serine the two cysteine residues thought to be S-nitrosylated in response to DHS did not modify the localization of the proteins, suggesting that S-nitrosylation of GAPCs was probably not necessary for their nuclear relocalization. Interestingly, using Förster resonance energy transfer experiments, we showed that Nt(BY-2)GAPCs interact with nucleic acids in the nucleus. When GAPCs were mutated on their cysteine residues, their interaction with nucleic acids was abolished, suggesting a role for GAPCs in the protection of nucleic acids against oxidative stress.
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Affiliation(s)
- Ambroise Testard
- Laboratoire de Recherche en Sciences Végétales, Université de Toulouse, CNRS, UPS, 24 chemin de Borde Rouge, Auzeville, BP42617, 31326, Castanet-Tolosan, France
- These authors contributed equally to this work
| | - Daniel Da Silva
- Laboratoire de Recherche en Sciences Végétales, Université de Toulouse, CNRS, UPS, 24 chemin de Borde Rouge, Auzeville, BP42617, 31326, Castanet-Tolosan, France
- These authors contributed equally to this work
| | - Mélanie Ormancey
- Laboratoire de Recherche en Sciences Végétales, Université de Toulouse, CNRS, UPS, 24 chemin de Borde Rouge, Auzeville, BP42617, 31326, Castanet-Tolosan, France
| | - Carole Pichereaux
- Institut de Pharmacologie et de Biologie Structurale IPBS CNRS, Fédération de Recherche 3450 Agrobiosciences Interactions et Biodiversités, Plateforme Protéomique Génopole Toulouse Midi Pyrénées, Toulouse, France
| | - Cécile Pouzet
- Institut Fédératif de Recherche 3450, Plateforme Imagerie-Microscopie, Pôle de Biotechnologie Végétale, 31326, Castanet-Tolosan, France
| | - Alain Jauneau
- Institut Fédératif de Recherche 3450, Plateforme Imagerie-Microscopie, Pôle de Biotechnologie Végétale, 31326, Castanet-Tolosan, France
| | - Sabine Grat
- Laboratoire de Recherche en Sciences Végétales, Université de Toulouse, CNRS, UPS, 24 chemin de Borde Rouge, Auzeville, BP42617, 31326, Castanet-Tolosan, France
| | - Eugénie Robe
- Laboratoire de Recherche en Sciences Végétales, Université de Toulouse, CNRS, UPS, 24 chemin de Borde Rouge, Auzeville, BP42617, 31326, Castanet-Tolosan, France
| | - Christian Brière
- Laboratoire de Recherche en Sciences Végétales, Université de Toulouse, CNRS, UPS, 24 chemin de Borde Rouge, Auzeville, BP42617, 31326, Castanet-Tolosan, France
| | - Valérie Cotelle
- Laboratoire de Recherche en Sciences Végétales, Université de Toulouse, CNRS, UPS, 24 chemin de Borde Rouge, Auzeville, BP42617, 31326, Castanet-Tolosan, France
| | - Christian Mazars
- Laboratoire de Recherche en Sciences Végétales, Université de Toulouse, CNRS, UPS, 24 chemin de Borde Rouge, Auzeville, BP42617, 31326, Castanet-Tolosan, France
| | - Patrice Thuleau
- Laboratoire de Recherche en Sciences Végétales, Université de Toulouse, CNRS, UPS, 24 chemin de Borde Rouge, Auzeville, BP42617, 31326, Castanet-Tolosan, France
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Yekkour A, Tran D, Arbelet-Bonnin D, Briand J, Mathieu F, Lebrihi A, Errakhi R, Sabaou N, Bouteau F. Early events induced by the toxin deoxynivalenol lead to programmed cell death in Nicotiana tabacum cells. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2015; 238:148-57. [PMID: 26259183 DOI: 10.1016/j.plantsci.2015.06.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/28/2015] [Revised: 06/04/2015] [Accepted: 06/05/2015] [Indexed: 06/04/2023]
Abstract
Deoxynivalenol (DON) is a mycotoxin affecting animals and plants. This toxin synthesized by Fusarium culmorum and Fusarium graminearum is currently believed to play a decisive role in the fungal phytopathogenesis as a virulence factor. Using cultured cells of Nicotiana tabacum BY2, we showed that DON-induced programmed cell death (PCD) could require transcription and translation processes, in contrast to what was observed in animal cells. DON could induce different cross-linked pathways involving (i) reactive oxygen species (ROS) generation linked, at least partly, to a mitochondrial dysfunction and a transcriptional down-regulation of the alternative oxidase (Aox1) gene and (ii) regulation of ion channel activities participating in cell shrinkage, to achieve PCD.
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Affiliation(s)
- Amine Yekkour
- Université Paris Diderot, Sorbonne Paris Cité, Institut des Energies de Demain, Paris, France; Ecole Normale Supérieure de Kouba, Laboratoire de Biologie de Systèmes Microbiens, Alger, Algeria; Institut National de la Recherche Agronomique d'Algérie, Centre de Recherche polyvalent Mehdi Boualem, Alger, Algeria
| | - Daniel Tran
- Université Paris Diderot, Sorbonne Paris Cité, Institut des Energies de Demain, Paris, France
| | - Delphine Arbelet-Bonnin
- Université Paris Diderot, Sorbonne Paris Cité, Institut des Energies de Demain, Paris, France
| | - Joël Briand
- Université Paris Diderot, Sorbonne Paris Cité, Institut des Energies de Demain, Paris, France
| | - Florence Mathieu
- Université de Toulouse, Laboratoire de Génie Chimique UMR 5503 (CNRS/INPT/UPS), ENSAT/INP de Toulouse, Castanet-Tolosan Cedex, France
| | - Ahmed Lebrihi
- Université de Toulouse, Laboratoire de Génie Chimique UMR 5503 (CNRS/INPT/UPS), ENSAT/INP de Toulouse, Castanet-Tolosan Cedex, France; Université Moulay Ismail, Marjane 2, BP 298, Meknès, Maroc
| | - Rafik Errakhi
- Université Moulay Ismail, Marjane 2, BP 298, Meknès, Maroc
| | - Nasserdine Sabaou
- Ecole Normale Supérieure de Kouba, Laboratoire de Biologie de Systèmes Microbiens, Alger, Algeria
| | - François Bouteau
- Université Paris Diderot, Sorbonne Paris Cité, Institut des Energies de Demain, Paris, France.
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18
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Coursol S, Fromentin J, Noirot E, Brière C, Robert F, Morel J, Liang YK, Lherminier J, Simon-Plas F. Long-chain bases and their phosphorylated derivatives differentially regulate cryptogein-induced production of reactive oxygen species in tobacco (Nicotiana tabacum) BY-2 cells. THE NEW PHYTOLOGIST 2015; 205:1239-1249. [PMID: 25303640 DOI: 10.1111/nph.13094] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2014] [Accepted: 09/06/2014] [Indexed: 06/04/2023]
Abstract
The proteinaceous elicitor cryptogein triggers defence reactions in Nicotiana tabacum (tobacco) through a signalling cascade, including the early production of reactive oxygen species (ROS) by the plasma membrane (PM)-located tobacco respiratory burst oxidase homologue D (NtRbohD). Sphingolipid long-chain bases (LCBs) are emerging as potent positive regulators of plant defence-related mechanisms. This led us to question whether both LCBs and their phosphorylated derivatives (LCB-Ps) are involved in the early signalling process triggered by cryptogein in tobacco BY-2 cells. Here, we showed that cryptogein-induced ROS production was inhibited by LCB kinase (LCBK) inhibitors. Additionally, Arabidopsis thaliana sphingosine kinase 1 and exogenously supplied LCB-Ps increased cryptogein-induced ROS production, whereas exogenously supplied LCBs had a strong opposite effect, which was not driven by a reduction in cellular viability. Immunogold-electron microscopy assay also revealed that LCB-Ps are present in the PM, which fits well with the presence of a high LCBK activity associated with this fraction. Our data demonstrate that LCBs and LCB-Ps differentially regulate cryptogein-induced ROS production in tobacco BY-2 cells, and support a model in which a cooperative synergism between LCBK/LCB-Ps and NtRbohD/ROS in the cryptogein signalling pathway is likely at the PM in tobacco BY-2 cells.
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Affiliation(s)
- Sylvie Coursol
- INRA, Institut Jean-Pierre Bourgin, UMR 1318, ERL CNRS 3559, Saclay Plant Sciences, RD10, F-78026, Versailles, France
- AgroParisTech, Institut Jean-Pierre Bourgin, UMR 1318, ERL CNRS 3559, Saclay Plant Sciences, RD10, F-78026, Versailles, France
| | - Jérôme Fromentin
- INRA, UMR 1347 Agroécologie, ERL CNRS 6300, BP 86510, F-21065, Dijon Cedex, France
| | - Elodie Noirot
- INRA, UMR 1347 Agroécologie, ERL CNRS 6300, BP 86510, F-21065, Dijon Cedex, France
| | - Christian Brière
- Laboratoire de Recherche en Sciences Végétales, UMR 5546, Université de Toulouse, BP 42617, F-31326, Castanet-Tolosan, France
- Laboratoire de Recherche en Sciences Végétales, CNRS, UMR 5546, BP 42617, F-31326, Castanet-Tolosan, France
| | - Franck Robert
- INRA, UMR 1347 Agroécologie, ERL CNRS 6300, BP 86510, F-21065, Dijon Cedex, France
| | - Johanne Morel
- INRA, UMR 1347 Agroécologie, ERL CNRS 6300, BP 86510, F-21065, Dijon Cedex, France
| | - Yun-Kuan Liang
- State Key Laboratory of Hybrid Rice, College of Life Sciences, Wuhan University, Wuhan, 430072, China
| | - Jeannine Lherminier
- INRA, UMR 1347 Agroécologie, ERL CNRS 6300, BP 86510, F-21065, Dijon Cedex, France
| | - Françoise Simon-Plas
- INRA, UMR 1347 Agroécologie, ERL CNRS 6300, BP 86510, F-21065, Dijon Cedex, France
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Michal Johnson J, Reichelt M, Vadassery J, Gershenzon J, Oelmüller R. An Arabidopsis mutant impaired in intracellular calcium elevation is sensitive to biotic and abiotic stress. BMC PLANT BIOLOGY 2014; 14:162. [PMID: 24920452 PMCID: PMC4074868 DOI: 10.1186/1471-2229-14-162] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2014] [Accepted: 05/29/2014] [Indexed: 05/05/2023]
Abstract
BACKGROUND Ca2+, a versatile intracellular second messenger in various signaling pathways, initiates many responses involved in growth, defense and tolerance to biotic and abiotic stress. Endogenous and exogenous signals induce cytoplasmic Ca2+ ([Ca2+]cyt) elevation, which are responsible for the appropriate downstream responses. RESULTS Here we report on an ethyl-methane sulfonate-mediated Arabidopsis mutant that fails to induce [Ca2+]cyt elevation in response to exudate preparations from the pathogenic mibrobes Alternaria brassicae, Rhizoctonia solani, Phytophthora parasitica var. nicotianae and Agrobacterium tumefaciens. The cytoplasmic Ca2+elevation mutant1 (cycam1) is susceptible to infections by A. brassicae, its toxin preparation and sensitive to abiotic stress such as drought and salt. It accumulates high levels of reactive oxygen species and contains elevated salicylic acid, abscisic acid and bioactive jasmonic acid iso-leucine levels. Reactive oxygen species- and phytohormone-related genes are higher in A. brassicae-treated wild-type and mutant seedlings. Depending on the analysed response, the elevated levels of defense-related compounds are either caused by the cycam mutation and are promoted by the pathogen, or they are mainly due to the pathogen infection or application of pathogen-associated molecular patterns. Furthermore, cycam1 shows altered responses to abscisic acid treatments: the hormone inhibits germination and growth of the mutant. CONCLUSIONS We isolated an Arabidopsis mutant which fails to induce [Ca2+]cyt elevation in response to exudate preparations from various microbes. The higher susceptibility of the mutant to pathogen infections correlates with the higher accumulation of defense-related compounds, such as phytohormones, reactive oxygen-species, defense-related mRNA levels and secondary metabolites. Therefore, CYCAM1 couples [Ca2+]cyt elevation to biotic, abiotic and oxidative stress responses.
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Affiliation(s)
- Joy Michal Johnson
- Institute of General Botany and Plant Physiology, Friedrich-Schiller-University Jena, Dornburger Str. 159, 07743 Jena, Germany
| | - Michael Reichelt
- Max Planck Institute for Chemical Ecology, Beutenberg Campus, Hans-Knöll-Straße 8, D-07745 Jena, Germany
| | - Jyothilakshmi Vadassery
- Max Planck Institute for Chemical Ecology, Beutenberg Campus, Hans-Knöll-Straße 8, D-07745 Jena, Germany
| | - Jonathan Gershenzon
- Max Planck Institute for Chemical Ecology, Beutenberg Campus, Hans-Knöll-Straße 8, D-07745 Jena, Germany
| | - Ralf Oelmüller
- Institute of General Botany and Plant Physiology, Friedrich-Schiller-University Jena, Dornburger Str. 159, 07743 Jena, Germany
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20
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Monetti E, Kadono T, Tran D, Azzarello E, Arbelet-Bonnin D, Biligui B, Briand J, Kawano T, Mancuso S, Bouteau F. Deciphering early events involved in hyperosmotic stress-induced programmed cell death in tobacco BY-2 cells. JOURNAL OF EXPERIMENTAL BOTANY 2014; 65:1361-75. [PMID: 24420571 PMCID: PMC3969528 DOI: 10.1093/jxb/ert460] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Hyperosmotic stresses represent one of the major constraints that adversely affect plants growth, development, and productivity. In this study, the focus was on early responses to hyperosmotic stress- (NaCl and sorbitol) induced reactive oxygen species (ROS) generation, cytosolic Ca(2+) concentration ([Ca(2+)]cyt) increase, ion fluxes, and mitochondrial potential variations, and on their links in pathways leading to programmed cell death (PCD). By using BY-2 tobacco cells, it was shown that both NaCl- and sorbitol-induced PCD seemed to be dependent on superoxide anion (O2·(-)) generation by NADPH-oxidase. In the case of NaCl, an early influx of sodium through non-selective cation channels participates in the development of PCD through mitochondrial dysfunction and NADPH-oxidase-dependent O2·(-) generation. This supports the hypothesis of different pathways in NaCl- and sorbitol-induced cell death. Surprisingly, other shared early responses, such as [Ca(2+)]cyt increase and singlet oxygen production, do not seem to be involved in PCD.
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Affiliation(s)
- Emanuela Monetti
- Université Paris Diderot, Sorbonne Paris Cité, Institut des Energies de Demain (UMR8236), Paris, France
- Institut de Biologie des Plantes, Bât 630, 91405 Orsay, France
- LINV-DiSPAA, Department of Agri-Food and Environmental Science, University of Florence, Viale delle Idee 30, 50019 Sesto Fiorentino (FI), Italy
| | - Takashi Kadono
- Université Paris Diderot, Sorbonne Paris Cité, Institut des Energies de Demain (UMR8236), Paris, France
- Graduate School of Environmental Engineering, University of Kitakyushu 1-1, Hibikino, Wakamatsu-ku, Kitakyushu 808-0135, Japan
- Laboratory of Crop Science, Department of Plant Resources, Faculty of Agriculture, Kyushu University, 6-10-1 Hakozaki, Higashi-ku, Fukuoka 812–8581, Japan
| | - Daniel Tran
- Université Paris Diderot, Sorbonne Paris Cité, Institut des Energies de Demain (UMR8236), Paris, France
- Institut de Biologie des Plantes, Bât 630, 91405 Orsay, France
| | - Elisa Azzarello
- LINV-DiSPAA, Department of Agri-Food and Environmental Science, University of Florence, Viale delle Idee 30, 50019 Sesto Fiorentino (FI), Italy
| | - Delphine Arbelet-Bonnin
- Université Paris Diderot, Sorbonne Paris Cité, Institut des Energies de Demain (UMR8236), Paris, France
- Institut de Biologie des Plantes, Bât 630, 91405 Orsay, France
| | - Bernadette Biligui
- Université Paris Diderot, Sorbonne Paris Cité, Institut des Energies de Demain (UMR8236), Paris, France
- Institut de Biologie des Plantes, Bât 630, 91405 Orsay, France
| | - Joël Briand
- Université Paris Diderot, Sorbonne Paris Cité, Institut des Energies de Demain (UMR8236), Paris, France
- Institut de Biologie des Plantes, Bât 630, 91405 Orsay, France
| | - Tomonori Kawano
- LINV-DiSPAA, Department of Agri-Food and Environmental Science, University of Florence, Viale delle Idee 30, 50019 Sesto Fiorentino (FI), Italy
- Graduate School of Environmental Engineering, University of Kitakyushu 1-1, Hibikino, Wakamatsu-ku, Kitakyushu 808-0135, Japan
- University of Florence LINV Kitakyushu Research Center (LINV@Kitakyushu), Kitakyushu, Japan
- Université Paris Diderot, Sorbonne Paris Cité, Paris Interdisciplinary Energy Research Institute (PIERI), Paris, France
| | - Stefano Mancuso
- LINV-DiSPAA, Department of Agri-Food and Environmental Science, University of Florence, Viale delle Idee 30, 50019 Sesto Fiorentino (FI), Italy
- University of Florence LINV Kitakyushu Research Center (LINV@Kitakyushu), Kitakyushu, Japan
- Université Paris Diderot, Sorbonne Paris Cité, Paris Interdisciplinary Energy Research Institute (PIERI), Paris, France
| | - François Bouteau
- Université Paris Diderot, Sorbonne Paris Cité, Institut des Energies de Demain (UMR8236), Paris, France
- Institut de Biologie des Plantes, Bât 630, 91405 Orsay, France
- LINV-DiSPAA, Department of Agri-Food and Environmental Science, University of Florence, Viale delle Idee 30, 50019 Sesto Fiorentino (FI), Italy
- University of Florence LINV Kitakyushu Research Center (LINV@Kitakyushu), Kitakyushu, Japan
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21
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Charpentier M, Oldroyd GE. Nuclear calcium signaling in plants. PLANT PHYSIOLOGY 2013; 163:496-503. [PMID: 23749852 PMCID: PMC3793031 DOI: 10.1104/pp.113.220863] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2013] [Accepted: 06/05/2013] [Indexed: 05/18/2023]
Abstract
Plant cell nuclei can generate calcium responses to a variety of inputs, tantamount among them the response to signaling molecules from symbiotic microorganisms .
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Affiliation(s)
- Myriam Charpentier
- Department of Cell and Developmental Biology, John Innes Centre, Norwich NR4 7UH, United Kingdom
| | - Giles E.D. Oldroyd
- Department of Cell and Developmental Biology, John Innes Centre, Norwich NR4 7UH, United Kingdom
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22
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Aphanomyces euteiches cell wall fractions containing novel glucan-chitosaccharides induce defense genes and nuclear calcium oscillations in the plant host Medicago truncatula. PLoS One 2013; 8:e75039. [PMID: 24086432 PMCID: PMC3781040 DOI: 10.1371/journal.pone.0075039] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2013] [Accepted: 08/08/2013] [Indexed: 01/15/2023] Open
Abstract
N-acetylglucosamine-based saccharides (chitosaccharides) are components of microbial cell walls and act as molecular signals during host-microbe interactions. In the legume plant Medicago truncatula, the perception of lipochitooligosaccharide signals produced by symbiotic rhizobia and arbuscular mycorrhizal fungi involves the Nod Factor Perception (NFP) lysin motif receptor-like protein and leads to the activation of the so-called common symbiotic pathway. In rice and Arabidopsis, lysin motif receptors are involved in the perception of chitooligosaccharides released by pathogenic fungi, resulting in the activation of plant immunity. Here we report the structural characterization of atypical chitosaccharides from the oomycete pathogen Aphanomyces euteiches, and their biological activity on the host Medicago truncatula. Using a combination of biochemical and biophysical approaches, we show that these chitosaccharides are linked to β-1,6-glucans, and contain a β-(1,3;1,4)-glucan backbone whose β-1,3-linked glucose units are substituted on their C-6 carbon by either glucose or N-acetylglucosamine residues. This is the first description of this type of structural motif in eukaryotic cell walls. Glucan-chitosaccharide fractions of A. euteiches induced the expression of defense marker genes in Medicago truncatula seedlings independently from the presence of a functional Nod Factor Perception protein. Furthermore, one of the glucan-chitosaccharide fractions elicited calcium oscillations in the nucleus of root cells. In contrast to the asymmetric oscillatory calcium spiking induced by symbiotic lipochitooligosaccharides, this response depends neither on the Nod Factor Perception protein nor on the common symbiotic pathway. These findings open new perspectives in oomycete cell wall biology and elicitor recognition and signaling in legumes.
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Guan Q, Wu J, Yue X, Zhang Y, Zhu J. A nuclear calcium-sensing pathway is critical for gene regulation and salt stress tolerance in Arabidopsis. PLoS Genet 2013; 9:e1003755. [PMID: 24009530 PMCID: PMC3757082 DOI: 10.1371/journal.pgen.1003755] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2013] [Accepted: 07/12/2013] [Indexed: 11/18/2022] Open
Abstract
Salt stress is an important environmental factor that significantly limits crop productivity worldwide. Studies on responses of plants to salt stress in recent years have identified novel signaling pathways and have been at the forefront of plant stress biology and plant biology in general. Thus far, research on salt stress in plants has been focused on cytoplasmic signaling pathways. In this study, we discovered a nuclear calcium-sensing and signaling pathway that is critical for salt stress tolerance in the reference plant Arabidopsis. Through a forward genetic screen, we found a nuclear-localized calcium-binding protein, RSA1 (SHORT ROOT IN SALT MEDIUM 1), which is required for salt tolerance, and identified its interacting partner, RITF1, a bHLH transcription factor. We show that RSA1 and RITF1 regulate the transcription of several genes involved in the detoxification of reactive oxygen species generated by salt stress and that they also regulate the SOS1 gene that encodes a plasma membrane Na+/H+ antiporter essential for salt tolerance. Together, our results suggest the existence of a novel nuclear calcium-sensing and -signaling pathway that is important for gene regulation and salt stress tolerance. Salt stress greatly constrains the productivity of crops worldwide. With the increasing demand for food and fiber from the growing world population, sustainability of crop production is of fundamental importance. Studies with plants in the past decade have identified novel signaling pathways, and so far, research on salt stress in plants has focused on cytoplasmic signaling pathways. In the current study, we revealed a nuclear calcium-sensing and -signaling pathway that is essential for salt tolerance in Arabidopsis. We identified a nuclear-localized calcium-binding protein, RSA1, in a forward genetic screen for salt tolerance determinants. We found an RSA1 interacting partner, RITF1, a bHLH transcription factor. RSA1 and RITF1 regulate the transcription of several genes involved in the scavenging of reactive oxygen species that are caused by salt stress, and they also regulate the SOS1 gene that encodes a plasma membrane-localized Na+/H+ antiporter crucial for Na+ homeostasis and salt tolerance. Our research suggests a novel nuclear calcium-sensing and -signaling pathway is important for gene regulation and salt stress tolerance.
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Affiliation(s)
- Qingmei Guan
- Department of Plant Science and Landscape Architecture, University of Maryland, College Park, Maryland, United States of America
| | - Jianmin Wu
- Department of Plant Science and Landscape Architecture, University of Maryland, College Park, Maryland, United States of America
| | - Xiule Yue
- Department of Plant Science and Landscape Architecture, University of Maryland, College Park, Maryland, United States of America
| | - Yanyan Zhang
- Department of Plant Science and Landscape Architecture, University of Maryland, College Park, Maryland, United States of America
| | - Jianhua Zhu
- Department of Plant Science and Landscape Architecture, University of Maryland, College Park, Maryland, United States of America
- * E-mail:
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Upadhyaya CP, Gururani MA, Prasad R, Verma A. A Cell Wall Extract from Piriformospora indica Promotes Tuberization in Potato (Solanum tuberosum L.) Via Enhanced Expression of Ca+2 Signaling Pathway and Lipoxygenase Gene. Appl Biochem Biotechnol 2013; 170:743-55. [DOI: 10.1007/s12010-013-0231-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2012] [Accepted: 04/07/2013] [Indexed: 10/26/2022]
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Baz M, Tran D, Kettani-Halabi M, Samri SE, Jamjari A, Biligui B, Meimoun P, El-Maarouf-Bouteau H, Garmier M, Saindrenan P, Ennaji MM, Barakate M, Bouteau F. Calcium- and ROS-mediated defence responses in BY2 tobacco cells by nonpathogenic Streptomyces sp. J Appl Microbiol 2012; 112:782-92. [PMID: 22292528 DOI: 10.1111/j.1365-2672.2012.05248.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
AIMS The early molecular events underlying the elicitation of plant defence reactions by Gram-positive bacteria are relatively unknown. In plants, calcium and reactive oxygen species are commonly involved as cellular messengers of a wide range of biotic stimuli from pathogenic to symbiotic bacteria. In the present work, we checked whether nonpathogenic Streptomyces sp. strains could induce early signalling events leading to defence responses in BY2 tobacco cell suspensions. METHODS AND RESULTS We have demonstrated that nonpathogenic Streptomyces sp. OE7 strain induced a cytosolic Ca(2+) increase and a biphasic oxidative burst in the upstream signalling events, leading to defence responses in BY2 tobacco cell suspensions. Streptomyces sp. OE7 also elicited delayed intracellular free scopoletin production and programmed cell death. In agreement with scopoletin production, OE7 induced accumulation of PAL transcripts and increased accumulation of transcripts of EREBP1 and AOX genes that are known to be regulated by the jasmonate/ethylene pathway. Transcript levels of PR1b and NIMIN2α, both salicylic acid pathway-linked genes, were not modified. Moreover, Streptomyces sp. OE7 culture filtrates could reduce Pectobacterium carotovorum- and Pectobacterium atrosepticum-induced death of BY2 cells and soft rot on potato slices. CONCLUSIONS New insights are thus provided into the interaction mechanisms between Streptomyces sp. and plants; Streptomyces sp. could be sensed by plant cells, and through cytosolic Ca(2+) changes and the generation of reactive oxygen species, defence responses were induced. SIGNIFICANCE AND IMPACT OF THE STUDY These induced defence responses appeared to participate in attenuating Pectobacterium-induced diseases in plants. Thus, Streptomyces sp. OE7 could be a biocontrol agent against Pectobacterium sp.
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Affiliation(s)
- M Baz
- LEM, Institut de Biologie des Plantes, Université Paris Diderot, Sorbonne Paris Cité, Orsay, France
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Weng H, Yoo CY, Gosney MJ, Hasegawa PM, Mickelbart MV. Poplar GTL1 is a Ca2+/calmodulin-binding transcription factor that functions in plant water use efficiency and drought tolerance. PLoS One 2012; 7:e32925. [PMID: 22396800 PMCID: PMC3292583 DOI: 10.1371/journal.pone.0032925] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2011] [Accepted: 02/02/2012] [Indexed: 01/10/2023] Open
Abstract
Diminishing global fresh water availability has focused research to elucidate mechanisms of water use in poplar, an economically important species. A GT-2 family trihelix transcription factor that is a determinant of water use efficiency (WUE), PtaGTL1 (GT-2 like 1), was identified in Populus tremula × P. alba (clone 717-IB4). Like other GT-2 family members, PtaGTL1 contains both N- and C-terminal trihelix DNA binding domains. PtaGTL1 expression, driven by the Arabidopsis thaliana AtGTL1 promoter, suppressed the higher WUE and drought tolerance phenotypes of an Arabidopsis GTL1 loss-of-function mutation (gtl1-4). Genetic suppression of gtl1-4 was associated with increased stomatal density due to repression of Arabidopsis STOMATAL DENSITY AND DISTRIBUTION1 (AtSDD1), a negative regulator of stomatal development. Electrophoretic mobility shift assays (EMSA) indicated that a PtaGTL1 C-terminal DNA trihelix binding fragment (PtaGTL1-C) interacted with an AtSDD1 promoter fragment containing the GT3 box (GGTAAA), and this GT3 box was necessary for binding. PtaGTL1-C also interacted with a PtaSDD1 promoter fragment via the GT2 box (GGTAAT). PtaSDD1 encodes a protein with 60% primary sequence identity with AtSDD1. In vitro molecular interaction assays were used to determine that Ca(2+)-loaded calmodulin (CaM) binds to PtaGTL1-C, which was predicted to have a CaM-interaction domain in the first helix of the C-terminal trihelix DNA binding domain. These results indicate that, in Arabidopsis and poplar, GTL1 and SDD1 are fundamental components of stomatal lineage. In addition, PtaGTL1 is a Ca(2+)-CaM binding protein, which infers a mechanism by which environmental stimuli can induce Ca(2+) signatures that would modulate stomatal development and regulate plant water use.
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Affiliation(s)
| | | | | | | | - Michael V. Mickelbart
- Department of Horticulture and Landscape Architecture, Center for Plant Environmental Stress Physiology, Purdue University, West Lafayette, Indiana, United States of America
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Amelot N, Dorlhac de Borne F, San Clemente H, Mazars C, Grima-Pettenati J, Brière C. Transcriptome analysis of tobacco BY-2 cells elicited by cryptogein reveals new potential actors of calcium-dependent and calcium-independent plant defense pathways. Cell Calcium 2012; 51:117-30. [PMID: 22177386 DOI: 10.1016/j.ceca.2011.11.010] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2011] [Revised: 11/04/2011] [Accepted: 11/24/2011] [Indexed: 11/29/2022]
Abstract
Cryptogein is a proteinaceous elicitor secreted by the oomycete Phytophthora cryptogea, which induces a hypersensitive response in tobacco plants. We have previously reported that in tobacco BY-2 cells treated with cryptogein, most of the genes of the phenylpropanoid pathway were upregulated and cell wall-bound phenolics accumulated. Both events were Ca(2+) dependent. In this study, we designed a microarray covering a large proportion of the tobacco genome and monitored gene expression in cryptogein-elicited BY-2 cells to get a more complete view of the transcriptome changes and to assess their Ca(2+) dependence. The predominant functional gene categories affected by cryptogein included stress- and disease-related proteins, phenylpropanoid pathway, signaling components, transcription factors and cell wall reinforcement. Among the 3819 unigenes whose expression changed more than fourfold, 90% were Ca(2+) dependent, as determined by their sensitivity to lanthanum chloride. The most Ca(2+)-dependent transcripts upregulated by cryptogein were involved in defense responses or the oxylipin pathway. This genome-wide study strongly supports the importance of Ca(2+)-dependent transcriptional regulation of regulatory and defense-related genes contributing to cryptogein responses in tobacco.
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Affiliation(s)
- Nicolas Amelot
- Université de Toulouse, Laboratoire de Recherches en Sciences Végétales, Castanet-Tolosan, France
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Ranty B, Cotelle V, Galaud JP, Mazars C. Nuclear Calcium Signaling and Its Involvement in Transcriptional Regulation in Plants. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2012; 740:1123-43. [DOI: 10.1007/978-94-007-2888-2_51] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Mazars C, Brière C, Bourque S, Thuleau P. Nuclear calcium signaling: an emerging topic in plants. Biochimie 2011; 93:2068-74. [PMID: 21683118 DOI: 10.1016/j.biochi.2011.05.039] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2011] [Accepted: 05/31/2011] [Indexed: 01/02/2023]
Abstract
The calcium ion is probably one of the most studied second messenger both in plant and animal fields. A large number of reviews have browsed the diversity of cytosolic calcium signatures and evaluated their pleiotropic roles in plant and animal cells. In the recent years, an increasing number of reviews has focused on nuclear calcium, especially on the possible roles of nuclear calcium concentration variations on nuclear activities. Experiments initially performed on animal cells gave conflicting results that brought about a controversy about the ability of the nucleus to generate its own calcium signals and to regulate its calcium level. But in plant cells, several converging scientific pieces of evidence support the hypothesis of nucleus autonomy. The present review briefly summarizes data supporting this hypothesis and tries to put forward some possible roles for these nucleus-generated calcium signals in controlling nuclear activity.
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Affiliation(s)
- Christian Mazars
- Université de Toulouse, Université Paul Sabatier, Laboratoire de Recherche en Sciences végétales, Castanet-Tolosan, France.
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Lachaud C, Da Silva D, Amelot N, Béziat C, Brière C, Cotelle V, Graziana A, Grat S, Mazars C, Thuleau P. Dihydrosphingosine-induced programmed cell death in tobacco BY-2 cells is independent of H₂O₂ production. MOLECULAR PLANT 2011; 4:310-8. [PMID: 21199880 DOI: 10.1093/mp/ssq077] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Sphinganine or dihydrosphingosine (d18:0, DHS), one of the most abundant free sphingoid Long Chain Base (LCB) in plants, has been recently shown to induce both cytosolic and nuclear calcium transient increases and a correlated Programmed Cell Death (PCD) in tobacco BY-2 cells. In this study, in order to get deeper insight into the LCB signaling pathway leading to cell death, the putative role of Reactive Oxygen Species (ROS) has been investigated. We show that DHS triggers a rapid dose-dependent production of H₂O₂ that is blocked by diphenyleniodonium (DPI), indicating the involvement of NADPH oxidase(s) in the process. In addition, while DPI does not block DHS-induced calcium increases, the ROS production is inhibited by the broad spectrum calcium channel blocker lanthanum (La³+). Therefore, ROS production occurs downstream of DHS-induced Ca²+ transients. Interestingly, DHS activates expression of defense-related genes that is inhibited by both La³+ and DPI. Since DPI does not prevent DHS-induced cell death, these results strongly indicate that DHS-induced H₂O₂ production is not implicated in PCD mechanisms but rather would be associated to basal cell defense mechanisms.
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Affiliation(s)
- Christophe Lachaud
- UPS, UMR 5546, Surfaces Cellulaires et Signalisation chez les Végétaux, Université de Toulouse, BP 42617, F-31326 Castanet-Tolosan, France
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31
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Poutrain P, Guirimand G, Mahroug S, Burlat V, Melin C, Ginis O, Oudin A, Giglioli-Guivarc'h N, Pichon O, Courdavault V. Molecular cloning and characterisation of two calmodulin isoforms of the Madagascar periwinkle Catharanthus roseus. PLANT BIOLOGY (STUTTGART, GERMANY) 2011; 13:36-41. [PMID: 21143723 DOI: 10.1111/j.1438-8677.2010.00325.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Involvement of Ca(2+) signalling in regulation of the biosynthesis of monoterpene indole alkaloids (MIA) in Catharanthus roseus has been extensively studied in recent years, albeit no protein of this signalling pathway has been isolated. Using a PCR strategy, two C. roseus cDNAs encoding distinct calmodulin (CAM) isoforms were cloned and named CAM1 and CAM2. The deduced 149 amino acid sequences possess four Ca(2+) binding domains and exhibit a close identity with Arabidopsis CAM isoforms (>91%). The ability of CAM1 and CAM2 to bind Ca(2+) was demonstrated following expression of the corresponding recombinant proteins. Furthermore, transient expression of CAM1-GFP and CAM2-GFP in C. roseus cells showed a typical nucleo-cytoplasm localisation of both CAMs, in agreement with the wide distribution of CAM target proteins. Using RNA blot analysis, we showed that CAM1 and CAM2 genes had a broad pattern of expression in C. roseus organs and are constitutively expressed during a C. roseus cell culture cycle, with a slight inhibitory effect of auxin for CAM1. Using RNA in situ hybridisation, we also detected CAM1 and CAM2 mRNA in the vascular bundle region of young seedling cotyledons. Finally, using specific inhibitors, we also showed that CAMs are required for MIA biosynthesis in C. roseus cells by acting on regulation of expression of genes encoding enzymes that catalyse early steps of MIA biosynthesis, such as 1-deoxy-d-xylulose 5-phosphate reductoisomerase and geraniol 10-hydroxylase.
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Affiliation(s)
- P Poutrain
- Université François Rabelais de Tours, EA 2106 Biomolécules et Biotechnologies Végétales, IFR 135 Imagerie fonctionnelle, Tours, France
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Amelot N, Carrouche A, Danoun S, Bourque S, Haiech J, Pugin A, Ranjeva R, Grima-Pettenati J, Mazars C, Briere C. Cryptogein, a fungal elicitor, remodels the phenylpropanoid metabolism of tobacco cell suspension cultures in a calcium-dependent manner. PLANT, CELL & ENVIRONMENT 2011; 34:149-61. [PMID: 20946589 DOI: 10.1111/j.1365-3040.2010.02233.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Plant cells use calcium-based signalling pathways to transduce biotic and/or abiotic stimuli into adaptive responses. However, little is known about the coupling between calcium signalling, transcriptional regulation and the downstream biochemical processes. To understand these relationships better, we challenged tobacco BY-2 cells with cryptogein and evaluated how calcium transients (monitored through the calcium sensor aequorin) impact (1) transcript levels of phenylpropanoid genes (assessed by RT-qPCR); and (2) derived-phenolic compounds (analysed by mass spectrometry). Most genes of the phenylpropanoid pathway were up-regulated by cryptogein and cell wall-bound phenolic compounds accumulated (mainly 5-hydroxyferulic acid). The accumulation of both transcripts and phenolics was calcium-dependent. The transcriptional regulation of phenylpropanoid genes was correlated in a non-linear manner with stimulus intensity and with components of the cryptogein-induced calcium signature. In addition, calmodulin inhibitors increased the sensitivity of cells to low concentrations of cryptogein. These results led us to propose a model of coupling between the cryptogein signal, calcium signalling and the transcriptional response, exerting control of transcription through the coordinated action of two decoding modules exerting opposite effects.
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Affiliation(s)
- Nicolas Amelot
- Université de Toulouse, UPS, UMR 5546 Surfaces Cellulaires et Signalisation chez les Végétaux, BP 42617, F-31326, Castanet-Tolosan, France
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Mazars C, Thuleau P, Lamotte O, Bourque S. Cross-talk between ROS and calcium in regulation of nuclear activities. MOLECULAR PLANT 2010; 3:706-18. [PMID: 20522524 DOI: 10.1093/mp/ssq024] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Calcium and Reactive Oxygen Species (ROS) are acknowledged as crucial second messengers involved in the response to various biotic and abiotic stresses. However, it is still not clear how these two compounds can play a role in different signaling pathways leading the plant to a variety of processes such as root development or defense against pathogens. Recently, it has been shown that the concept of calcium and ROS signatures, initially discovered in the cytoplasm, can also be extended to the nucleus of plant cells. In addition, it has been clearly proved that both ROS and calcium signals are intimately interconnected. How this cross-talk can finally modulate the translocation and/or the activity of nuclear proteins leading to the control of specific genes expression is the main focus of this review. We will especially focus on how calcium and ROS interact at the molecular level to modify their targets.
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Affiliation(s)
- Christian Mazars
- Université de Toulouse, UPS, UMR 5546, Surfaces Cellulaires et Signalisation chez les Végétaux, BP 42617, F-31326 Castanet-Tolosan, France
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Roelfsema MRG, Hedrich R. Making sense out of Ca(2+) signals: their role in regulating stomatal movements. PLANT, CELL & ENVIRONMENT 2010; 33:305-321. [PMID: 19906147 DOI: 10.1111/j.1365-3040.2009.02075.x] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Plant cells maintain high Ca(2+) concentration gradients between the cytosol and the extracellular matrix, as well as intracellular compartments. During evolution, the regulatory mechanisms, maintaining low cytosolic free Ca(2+) concentrations, most likely provided the backbone for the development of Ca(2+)-dependent signalling pathways. In this review, the current understanding of molecular mechanisms involved in Ca(2+) homeostasis of plants cells is evaluated. The question is addressed to which extent the mechanisms, controlling the cytosolic Ca(2+) concentration, are linked to Ca(2+)-based signalling. A large number of environmental stimuli can evoke Ca(2+) signals, but the Ca(2+)-induced responses are likely to differ depending on the stimulus applied. Two mechanisms are put forward to explain signal specificity of Ca(2+)-dependent responses. A signal may evoke a specific Ca(2+) signature that is recognized by downstream signalling components. Alternatively, Ca(2+) signals are accompanied by Ca(2+)-independent signalling events that determine the specificity of the response. The existence of such parallel-acting pathways explains why guard cell responses to abscisic acid (ABA) can occur in the absence, as well as in the presence, of Ca(2+) signals. Future research may shed new light on the relation between parallel acting Ca(2+)-dependent and -independent events, and may provide insights in their evolutionary origin.
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Affiliation(s)
- M Rob G Roelfsema
- Molecular Plant Physiology and Biophysics, Julius-von-Sachs Institute for Biosciences, Biocenter, Würzburg University, Julius-von-Sachs-Platz 2, D-97082 Würzburg, Germany.
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Lachaud C, Da Silva D, Cotelle V, Thuleau P, Xiong TC, Jauneau A, Brière C, Graziana A, Bellec Y, Faure JD, Ranjeva R, Mazars C. Nuclear calcium controls the apoptotic-like cell death induced by d-erythro-sphinganine in tobacco cells. Cell Calcium 2010; 47:92-100. [PMID: 20022633 DOI: 10.1016/j.ceca.2009.11.011] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2009] [Revised: 11/24/2009] [Accepted: 11/26/2009] [Indexed: 01/02/2023]
Abstract
Studies performed in animals have highlighted the major role of sphingolipids in regulating the balance between cell proliferation and cell death. Sphingolipids have also been shown to induce cell death in plants via calcium-based signalling pathways but the contribution of free cytosolic and/or nuclear calcium in the overall process has never been evaluated. Here, we show that increase in tobacco BY-2 cells of the endogenous content of Long Chain Bases (LCBs) caused by external application of d-erythro-sphinganine (DHS) is followed by immediate dose-dependent elevations of cellular free calcium concentration within the first minute in the cytosol and 10min later in the nucleus. Cells challenged with DHS enter a death process through apoptotic-like mechanisms. Lanthanum chloride, a general blocker of calcium entry, suppresses the cellular calcium variations and the PCD induced by DHS. Interestingly, dl-2-amino-5-phosphopentanoic acid (AP5) and [(+)-dizocilpine] (MK801), two inhibitors of animal and plant ionotropic glutamate receptors, suppress DHS-induced cell death symptoms by selectively inhibiting the variations of nuclear calcium concentration. The selective action of these compounds demonstrates the crucial role of nuclear calcium signature in controlling DHS-induced cell death in tobacco cells.
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Affiliation(s)
- Christophe Lachaud
- Université de Toulouse, UPS, UMR CNRS-UPS, Surfaces Cellulaires et Signalisation chez les Végétaux, Auzeville, Castanet-Tolosan, France
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Vadassery J, Ranf S, Drzewiecki C, Mithöfer A, Mazars C, Scheel D, Lee J, Oelmüller R. A cell wall extract from the endophytic fungus Piriformospora indica promotes growth of Arabidopsis seedlings and induces intracellular calcium elevation in roots. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2009; 59:193-206. [PMID: 19392691 DOI: 10.1111/j.1365-313x.2009.03867.x] [Citation(s) in RCA: 78] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Calcium (Ca2+), as a second messenger, is crucial for signal transduction processes during many biotic interactions. We demonstrate that cellular [Ca2+] elevations are early events in the interaction between the plant growth-promoting fungus Piriformospora indica and Arabidopsis thaliana. A cell wall extract (CWE) from the fungus promotes the growth of wild-type seedlings but not of seedlings from P. indica-insensitive mutants. The extract and the fungus also induce a similar set of genes in Arabidopsis roots, among them genes with Ca2+ signalling-related functions. The CWE induces a transient cytosolic Ca2+ ([Ca2+](cyt)) elevation in the roots of Arabidopsis and tobacco (Nicotiana tabacum) plants, as well as in BY-2 suspension cultures expressing the Ca2+ bioluminescent indicator aequorin. Nuclear Ca2+ transients were also observed in tobacco BY-2 cells. The Ca2+ response was more pronounced in roots than in shoots and involved Ca2+ uptake from the extracellular space as revealed by inhibitor studies. Inhibition of the Ca2+ response by staurosporine and the refractory nature of the Ca2+ elevation suggest that a receptor may be involved. The CWE does not stimulate H2O2 production and the activation of defence gene expression, although it led to phosphorylation of mitogen-activated protein kinases (MAPKs) in a Ca2+-dependent manner. The involvement of MAPK6 in the mutualistic interaction was shown for an mpk6 line, which did not respond to P. indica. Thus, Ca2+ is likely to be an early signalling component in the mutualistic interaction between P. indica and Arabidopsis or tobacco.
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Affiliation(s)
- Jyothilakshmi Vadassery
- Friedrich-Schiller-Universität Jena, Institut für Allgemeine Botanik und Pflanzenphysiologie, Dornburger Street 159, D-07743 Jena, Germany
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Dagher R, Brière C, Fève M, Zeniou M, Pigault C, Mazars C, Chneiweiss H, Ranjeva R, Kilhoffer MC, Haiech J. Calcium fingerprints induced by calmodulin interactors in eukaryotic cells. BIOCHIMICA ET BIOPHYSICA ACTA 2009; 1793:1068-77. [PMID: 19133300 DOI: 10.1016/j.bbamcr.2008.11.019] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/24/2008] [Revised: 11/19/2008] [Accepted: 11/20/2008] [Indexed: 10/21/2022]
Abstract
Calcium (Ca2+) is a ubiquitous second messenger which promotes cell responses through transient changes in intracellular concentrations. The prominent role of Ca2+ in cell physiology is mediated by a whole set of proteins constituting a Ca2+-signalling toolkit involved in Ca2+-signal generation, deciphering and arrest. The different Ca2+-signalosomes deliver Ca2+-signals with spatial and temporal dynamics to control the function of specific cell types. Among the intracellular proteins involved in Ca2+-signal deciphering, calmodulin (CaM) plays a pivotal role in controlling Ca2+-homeostasis and downstream Ca2+-based signalling events. Due to its ubiquitous expression in eukaryotic cells and the variety of proteins it interacts with, CaM is central in Ca2+-signalling networks. For these reasons, it is expected that disrupting or modifying CaM interactions with its target proteins will affect Ca2+-homeostasis and cellular responses. The resulting calcium response will vary depending on which interactions between CaM and target proteins are altered by the molecules and on the specific Ca2+-toolkit expressed in a given cell, even in the resting state. In the present paper, the effect of six classical CaM interactors (W5, W7, W12, W13, bifonazole and calmidazolium) was studied on Ca2+-signalling in tumor initiating cells isolated from human glioblastoma (TG1) and tobacco cells (BY-2) using the fluorescent Ca2+-sensitive Indo-1 dye and aequorin, respectively. Various Ca2+-fingerprints were obtained depending both on the CaM interactor used and the cell type investigated. These data demonstrate that interaction between the antagonists and CaM results in a differential inhibition of CaM-dependent proteins involved in Ca2+-signal regulation. In addition, the distinct Ca2+-fingerprints in tobacco and human tumor initiating glioblastoma cells induced by a given CaM interactor highlight the specificity of the Ca2+-signalosome in eukaryotic cells.
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Affiliation(s)
- Rania Dagher
- UMR CNRS 7200, Université de Strasbourg, Faculté de Pharmacie 74, route du Rhin, F-67401 Illkirch, France
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Poutrain P, Mazars C, Thiersault M, Rideau M, Pichon O. Two distinct intracellular Ca2+-release components act in opposite ways in the regulation of the auxin-dependent MIA biosynthesis in Catharanthus roseus cells. JOURNAL OF EXPERIMENTAL BOTANY 2009; 60:1387-98. [PMID: 19218316 DOI: 10.1093/jxb/erp017] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Calcium-mediated signalling is ubiquitous in both animals and plants. Changes in cytoplasmic free Ca(2+) concentration couple diverse arrays of stimuli to their specific responses, the specificity of the stimulus being determined by integrated actions between multiple Ca(2+) mobilization pathways. In this work, a pharmacological approach is reported, aimed at deciphering the role of calcium as a second messenger in the transduction pathway leading to the inhibitory effect of 2,4-dichlorophenoxyacetic acid (2,4-D), in regulating monoterpene indole alkaloid (MIA) biosynthesis in Catharanthus roseus cells. It is demonstrated here that auxin-dependent MIA biosynthesis is differentially regulated by two distinct calcium release components from internal stores in C. roseus showing pharmacological profiles similar to those displayed by animal RyR and IP3 channels. MIA biosynthesis is stimulated by caffeine (Ca(2+)-release activator through RyR channels) and by heparin and TMB8 (Ca(2+)-release inhibitors of IP3 channels) whereas MIA biosynthesis is inhibited by mastoparan (Ca(2+)-release activator of IP3 channels) and by ruthenium red and DHBP (Ca(2+)-release inhibitors of RyR channels). Furthermore, calcium, as 2,4-D, acts on MIA biosynthesis by regulating the monoterpene moiety of the MIA biosynthesis pathway since calcium channel modulators preferentially modulate g10h expression, the gene encoding the enzyme of the secoiridoid monoterpene pathway, that is the major target of 2,4-D action. In addition, the simultaneous use of caffeine (an activator of RyR channel in animals) and TMB8 (an inhibitor of the IP3 channel) in 2,4-D treated cells triggers a synergistic effect on MIA accumulation. This finding suggests an opposite and co-ordinated action of multiple Ca(2+)-release pathways in 2,4-D signal transduction, adding a new level of complexity to calcium signalling in plants and questioning the existence of RyR and IP3 channels in plants.
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Affiliation(s)
- Pierre Poutrain
- Université François Rabelais de Tours, EA 2106 Biomolécules et Biotechnologies végétales, F-37200 Tours, France.
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39
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Kim MC, Chung WS, Yun DJ, Cho MJ. Calcium and calmodulin-mediated regulation of gene expression in plants. MOLECULAR PLANT 2009; 2:13-21. [PMID: 19529824 PMCID: PMC2639735 DOI: 10.1093/mp/ssn091] [Citation(s) in RCA: 85] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2008] [Accepted: 11/21/2008] [Indexed: 05/17/2023]
Abstract
Sessile plants have developed a very delicate system to sense diverse kinds of endogenous developmental cues and exogenous environmental stimuli by using a simple Ca2+ ion. Calmodulin (CaM) is the predominant Ca2+ sensor and plays a crucial role in decoding the Ca2+ signatures into proper cellular responses in various cellular compartments in eukaryotes. A growing body of evidence points to the importance of Ca2+ and CaM in the regulation of the transcriptional process during plant responses to endogenous and exogenous stimuli. Here, we review recent progress in the identification of transcriptional regulators modulated by Ca2+ and CaM and in the assessment of their functional significance during plant signal transduction in response to biotic and abiotic stresses and developmental cues.
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Affiliation(s)
- Min Chul Kim
- Division of Applied Life Science (BK21 Program), Plant Molecular Biology and Biotechnology Research Center and Environmental Biotechnology National Core Research Center, Gyeongsang National University, Jinju 660-701, Korea.
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Mazars C, Bourque S, Mithöfer A, Pugin A, Ranjeva R. Calcium homeostasis in plant cell nuclei. THE NEW PHYTOLOGIST 2009; 181:261-274. [PMID: 19130634 DOI: 10.1111/j.1469-8137.2008.02680.x] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
In plant cells, calcium-based signaling pathways are involved in a large array of biological processes, including cell division, polarity, growth, development and adaptation to changing biotic and abiotic environmental conditions. Free calcium changes are known to proceed in a nonstereotypical manner and produce a specific signature, which mirrors the nature, strength and frequency of a stimulus. The temporal aspects of calcium signatures are well documented, but their vectorial aspects also have a profound influence on biological output. Here, we will focus on the regulation of calcium homeostasis in the nucleus. We will discuss data and present hypotheses suggesting that, while interacting with other organelles, the nucleus has the potential to generate and regulate calcium signals on its own.
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Affiliation(s)
- Christian Mazars
- UMR CNRS 5546/Université de Toulouse, Surfaces Cellulaires et Signalisation chez les Végétaux, Pôle de Biotechnologie Végétale, BP 42617 Auzeville, 31326 Castanet-Tolosan cédex, France;UMR INRA 1088/CNRS 5184/Université de Bourgogne Plante-Microbe-Environnement, 17 Rue Sully, BP 86510, 21065 Dijon cédex, France;Max Planck Institute for Chemical Ecology, Department Bioorganic Chemistry, Hans-Knöll-Str. 8, 07745 Jena, Germany;GDR CNRS Calcium et Régulation des Gènes, 118 route de Narbonne, 31062 Toulouse cédex, France
| | - Stéphane Bourque
- UMR CNRS 5546/Université de Toulouse, Surfaces Cellulaires et Signalisation chez les Végétaux, Pôle de Biotechnologie Végétale, BP 42617 Auzeville, 31326 Castanet-Tolosan cédex, France;UMR INRA 1088/CNRS 5184/Université de Bourgogne Plante-Microbe-Environnement, 17 Rue Sully, BP 86510, 21065 Dijon cédex, France;Max Planck Institute for Chemical Ecology, Department Bioorganic Chemistry, Hans-Knöll-Str. 8, 07745 Jena, Germany;GDR CNRS Calcium et Régulation des Gènes, 118 route de Narbonne, 31062 Toulouse cédex, France
| | - Axel Mithöfer
- UMR CNRS 5546/Université de Toulouse, Surfaces Cellulaires et Signalisation chez les Végétaux, Pôle de Biotechnologie Végétale, BP 42617 Auzeville, 31326 Castanet-Tolosan cédex, France;UMR INRA 1088/CNRS 5184/Université de Bourgogne Plante-Microbe-Environnement, 17 Rue Sully, BP 86510, 21065 Dijon cédex, France;Max Planck Institute for Chemical Ecology, Department Bioorganic Chemistry, Hans-Knöll-Str. 8, 07745 Jena, Germany;GDR CNRS Calcium et Régulation des Gènes, 118 route de Narbonne, 31062 Toulouse cédex, France
| | - Alain Pugin
- UMR CNRS 5546/Université de Toulouse, Surfaces Cellulaires et Signalisation chez les Végétaux, Pôle de Biotechnologie Végétale, BP 42617 Auzeville, 31326 Castanet-Tolosan cédex, France;UMR INRA 1088/CNRS 5184/Université de Bourgogne Plante-Microbe-Environnement, 17 Rue Sully, BP 86510, 21065 Dijon cédex, France;Max Planck Institute for Chemical Ecology, Department Bioorganic Chemistry, Hans-Knöll-Str. 8, 07745 Jena, Germany;GDR CNRS Calcium et Régulation des Gènes, 118 route de Narbonne, 31062 Toulouse cédex, France
| | - Raoul Ranjeva
- UMR CNRS 5546/Université de Toulouse, Surfaces Cellulaires et Signalisation chez les Végétaux, Pôle de Biotechnologie Végétale, BP 42617 Auzeville, 31326 Castanet-Tolosan cédex, France;UMR INRA 1088/CNRS 5184/Université de Bourgogne Plante-Microbe-Environnement, 17 Rue Sully, BP 86510, 21065 Dijon cédex, France;Max Planck Institute for Chemical Ecology, Department Bioorganic Chemistry, Hans-Knöll-Str. 8, 07745 Jena, Germany;GDR CNRS Calcium et Régulation des Gènes, 118 route de Narbonne, 31062 Toulouse cédex, France
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41
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Xiong TC, Coursol S, Grat S, Ranjeva R, Mazars C. Sphingolipid metabolites selectively elicit increases in nuclear calcium concentration in cell suspension cultures and in isolated nuclei of tobacco. Cell Calcium 2008; 43:29-37. [PMID: 17570488 DOI: 10.1016/j.ceca.2007.02.005] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2006] [Revised: 02/07/2007] [Accepted: 02/13/2007] [Indexed: 11/29/2022]
Abstract
Sphingolipids are known to interfere with calcium-based signalling pathways. Here we report that these compounds modulate nuclear calcium signalling in tobacco BY-2 cells. Nuclear protein kinase activity phosphorylated endogenous sphingoid long-chain bases (LCBs), suggesting that LCBs are actively metabolized in the nucleus of tobacco BY-2 cells. The Delta4-unsaturated LCB D-erythro-sphingosine and the saturated LCB D-ribo-phytosphingosine elicited increases in free calcium in the nucleus in a dose-dependent and structure-related manner. However, neither sphingosine-1-phosphate nor C2-ceramide was able to stimulate nuclear calcium changes. N-,N-Dimethyl-D-erythro-sphingosine, a structural analogue of D-erythro-sphingosine, was the most efficient LCB so far tested in eliciting nuclear calcium changes both in intact tobacco BY-2 cells and in isolated nuclei. TRP channel inhibitors prevent the effect of DMS, suggesting that LCBs may activate TRP-like channels located on the inner nuclear membrane Collectively, the obtained data show that nuclei respond to LCBs on their own independently of the cytosolic compartment.
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Affiliation(s)
- Tou Cheu Xiong
- UMR CNRS/UPS 5546, Surfaces Cellulaires et Signalisation chez les Végétaux, Pôle de Biotechnologie Végétale, 24 Chemin de Borde Rouge, BP 42617 Auzeville, 31326 Castanet-Tolosan, France
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42
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Walter A, Mazars C, Maitrejean M, Hopke J, Ranjeva R, Boland W, Mithöfer A. Strukturelle Erfordernisse für Jasmonate und synthetische Analoga als Auslöser von Calciumsignalen im Zellkern und im Cytosol von Pflanzenzellen. Angew Chem Int Ed Engl 2007. [DOI: 10.1002/ange.200604989] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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43
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Walter A, Mazars C, Maitrejean M, Hopke J, Ranjeva R, Boland W, Mithöfer A. Structural requirements of jasmonates and synthetic analogues as inducers of Ca2+ signals in the nucleus and the cytosol of plant cells. Angew Chem Int Ed Engl 2007; 46:4783-5. [PMID: 17487903 DOI: 10.1002/anie.200604989] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Agnes Walter
- Max-Planck-Institut für Chemische Okologie, Bioorganische Chemie, Hans-Knöll-Strasse 8, 07745 Jena, Germany
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44
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Xiong TC, Bourque S, Mazars C, Pugin A, Ranjeva R. Signalisation calcique cytosolique et nucléaire et réponses des plantes aux stimulus biotiques et abiotiques. Med Sci (Paris) 2006; 22:1025-8. [PMID: 17156719 DOI: 10.1051/medsci/200622121025] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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45
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Xiong TC, Bourque S, Lecourieux D, Amelot N, Grat S, Brière C, Mazars C, Pugin A, Ranjeva R. Calcium signaling in plant cell organelles delimited by a double membrane. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2006; 1763:1209-15. [PMID: 17052770 DOI: 10.1016/j.bbamcr.2006.09.024] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2006] [Revised: 09/13/2006] [Accepted: 09/15/2006] [Indexed: 01/07/2023]
Abstract
Increases in the concentration of free calcium in the cytosol are one of the general events that relay an external stimulus to the internal cellular machinery and allow eukaryotic organisms, including plants, to mount a specific biological response. Different lines of evidence have shown that other intracellular organelles contribute to the regulation of free calcium homeostasis in the cytosol. The vacuoles, the endoplasmic reticulum and the cell wall constitute storage compartments for mobilizable calcium. In contrast, the role of organelles surrounded by a double membrane (e.g. mitochondria, chloroplasts and nuclei) is more complex. Here, we review experimental data showing that these organelles harbor calcium-dependent biological processes. Mitochondria, chloroplasts as well as nuclei are equipped to generate calcium signal on their own. Changes in free calcium in a given organelle may also favor the relocalization of proteins and regulatory components and therefore have a profound influence on the integrated functioning of the cell. Studying, in time and space, the dynamics of different components of calcium signaling pathway will certainly give clues to understand the extraordinary flexibility of plants to respond to stimuli and mount adaptive responses. The availability of technical and biological resources should allow breaking new grounds by unveiling the contribution of signaling networks in integrative plant biology.
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Affiliation(s)
- Tou-Cheu Xiong
- UMR CNRS/Université Paul Sabatier 5546, Surfaces Cellulaires et Signalisation chez les Végétaux, Pôle de Biotechnologie Végétale, 24 chemin de Borde Rouge, Auzeville BP42617, 31326 Castanet-Tolosan, France
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46
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Garnier L, Simon-Plas F, Thuleau P, Agnel JP, Blein JP, Ranjeva R, Montillet JL. Cadmium affects tobacco cells by a series of three waves of reactive oxygen species that contribute to cytotoxicity. PLANT, CELL & ENVIRONMENT 2006; 29:1956-69. [PMID: 16930321 DOI: 10.1111/j.1365-3040.2006.01571.x] [Citation(s) in RCA: 163] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Cadmium is suspected to exert its toxic action on cells through oxidative damage. However, the transition metal is unable to directly generate reactive oxygen species (ROS) via redox reactions with molecular oxygen in a biological environment. Here, we show that bright yellow-2 (BY-2) tobacco cells exposed to millimolar concentrations of CdCl(2) developed cell death within 2-3 h. The death process was preceded by two successive waves of ROS differing in their nature and subcellular localization. Firstly, these consisted in the transient NADPH oxidase-dependent accumulation of H(2)O(2) followed by the accumulation of O(2) (-*) in mitochondria. A third wave of ROS consisting in fatty acid hydroperoxide accumulation was concomitant with cell death. Accumulation of H(2)O(2) was preceded by an increase in cytosolic free calcium concentration originating from internal pools that was essential to activate the NADPH oxidase. The cell line gp3, impaired in NADPH oxidase activity, and that was unable to accumulate H(2)O(2) in response to Cd(2+), was nevertheless poisoned by the metal. Therefore, this first wave of ROS was not sufficient to trigger all the cadmium-dependent deleterious effects. However, we show that the accumulation of O(2) (-*) of mitochondrial origin and membrane peroxidation are key players in Cd(2+)-induced cell death.
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Affiliation(s)
- Lionel Garnier
- Commissariat à l'Energie Atomique, Centre de Cadarache, DSV-DEVM, Laboratoire de Radiobiologie Végétale, 13108 Saint-Paul lez Durance Cedex, France
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47
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Gaulin E, Dramé N, Lafitte C, Torto-Alalibo T, Martinez Y, Ameline-Torregrosa C, Khatib M, Mazarguil H, Villalba-Mateos F, Kamoun S, Mazars C, Dumas B, Bottin A, Esquerré-Tugayé MT, Rickauer M. Cellulose binding domains of a Phytophthora cell wall protein are novel pathogen-associated molecular patterns. THE PLANT CELL 2006; 18:1766-77. [PMID: 16766692 PMCID: PMC1488925 DOI: 10.1105/tpc.105.038687] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2005] [Revised: 04/21/2006] [Accepted: 05/11/2006] [Indexed: 05/10/2023]
Abstract
The cellulose binding elicitor lectin (CBEL) from Phytophthora parasitica nicotianae contains two cellulose binding domains (CBDs) belonging to the Carbohydrate Binding Module1 family, which is found almost exclusively in fungi. The mechanism by which CBEL is perceived by the host plant remains unknown. The role of CBDs in eliciting activity was investigated using modified versions of the protein produced in Escherichia coli or synthesized in planta through the potato virus X expression system. Recombinant CBEL produced by E. coli elicited necrotic lesions and defense gene expression when injected into tobacco (Nicotiana tabacum) leaves. CBEL production in planta induced necrosis. Site-directed mutagenesis on aromatic amino acid residues located within the CBDs as well as leaf infiltration assays using mutated and truncated recombinant proteins confirmed the importance of intact CBDs to induce defense responses. Tobacco and Arabidopsis thaliana leaf infiltration assays using synthetic peptides showed that the CBDs of CBEL are essential and sufficient to stimulate defense responses. Moreover, CBEL elicits a transient variation of cytosolic calcium levels in tobacco cells but not in protoplasts. These results define CBDs as a novel class of molecular patterns in oomycetes that are targeted by the innate immune system of plants and might act through interaction with the cell wall.
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Affiliation(s)
- Elodie Gaulin
- Unité Mixte de Recherche 5546, Centre National de la Recherche Scientifique-Université Paul Sabatier-Toulouse III, Pôle de Biotechnologie Végétale, 31326 Castanet-Tolosan, France
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48
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Ranty B, Aldon D, Galaud JP. Plant calmodulins and calmodulin-related proteins: multifaceted relays to decode calcium signals. PLANT SIGNALING & BEHAVIOR 2006; 1:96-104. [PMID: 19521489 PMCID: PMC2635005 DOI: 10.4161/psb.1.3.2998] [Citation(s) in RCA: 94] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2006] [Accepted: 05/09/2006] [Indexed: 05/18/2023]
Abstract
The calmodulin (CaM) family is a major class of calcium sensor proteins which collectively play a crucial role in cellular signaling cascades through the regulation of numerous target proteins. Although CaM is one of the most conserved proteins in all eukaryotes, several features of CaM and its downstream effector proteins are unique to plants. The continuously growing repertoire of CaM-binding proteins includes several plant-specific proteins. Plants also possess a particular set of CaM isoforms and CaM-like proteins (CMLs) whose functions have just begun to be elucidated. This review summarizes recent insights that help to understand the role of this multigene family in plant development and adaptation to environmental stimuli.
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Affiliation(s)
- Benoît Ranty
- UMR 5546 CNRS-Université Paul Sabatier; Pôle de Biotechnologie végétale; Castanet-Tolosan; France
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49
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Brière C, Xiong TC, Mazars C, Ranjeva R. Autonomous regulation of free Ca2+ concentrations in isolated plant cell nuclei: a mathematical analysis. Cell Calcium 2006; 39:293-303. [PMID: 16473405 DOI: 10.1016/j.ceca.2005.11.005] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2005] [Revised: 11/24/2005] [Accepted: 11/28/2005] [Indexed: 01/14/2023]
Abstract
Experiments performed on nuclei isolated from animal or plant cells have provided evidence that the nucleus generates directly specific nucleoplasmic calcium transients in response to external stimuli. Recent data suggest that isolated plant nuclei might be considered as a closed system where the nuclear concentration of free calcium would be regulated by reversible movements between the nucleoplasm and nuclear stores. We have addressed the relevance of this hypothesis by developing a mathematical approach to simulate nucleoplasmic calcium dynamics generated under various pH and temperature conditions. Here, we show that the experimental results could be explained provided that calcium channels as well as systems transporting calcium are present on the inner nuclear membrane. The putative channels would allow the entry of calcium into the nucleoplasm whereas the elusive transporting system(s) would contribute to replenish the nuclear stores. The simple proposed model is versatile enough to explain and predict autonomous changes in free calcium in the nucleoplasm of isolated plant nuclei.
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Affiliation(s)
- Christian Brière
- UMR CNRS-UPS 5546, Pôle de Biotechnologie Végétale, Castanet-Tolosan, France
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50
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Abstract
In plant cells, the calcium ion is a ubiquitous intracellular second messenger involved in numerous signalling pathways. Variations in the cytosolic concentration of Ca2+ ([Ca2+]cyt) couple a large array of signals and responses. Here we concentrate on calcium signalling in plant defence responses, particularly on the generation of the calcium signal and downstream calcium-dependent events participating in the establishment of defence responses with special reference to calcium-binding proteins.
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Affiliation(s)
- David Lecourieux
- UMR CNRS 5546 Université Paul Sabatier, Signaux et Messages Cellulaires chez les Végétaux, Pôle de Biotechnologies Végétales, 24 chemin de Borde Rouge, BP 17, Auzeville, 31326 Castanet-Tolosan, France
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