1
|
Foyer CH, Kunert K. The ascorbate/glutathione cycle coming of age. J Exp Bot 2024:erae023. [PMID: 38243395 DOI: 10.1093/jxb/erae023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Indexed: 01/21/2024]
Abstract
Concepts, regarding the operation of the ascorbate/glutathione cycle and the associated water/water cycle in the processing of metabolically-generated hydrogen peroxide and other forms of reactive oxygen species (ROS), are well established in the literature. However, our knowledge of functions of these cycles and their component enzymes continues to grow and evolve. Recent insights include participation in the intrinsic environmental and developmental signaling pathways that regulate plant growth, development and defense. In addition to ROS processing, the enzymes of the two cycles not only support the functions of ascorbate and glutathione, they also have "moonlighting" functions. They are subject to post-translational modifications and have an extensive interactome, particularly with other signaling proteins. In this assessment of current knowledge, we highlight the central position of the ascorbate/glutathione cycle in the network of cellular redox systems that underpin the energy-sensitive communication within the different cellular compartments and integrate plant signalling pathways.
Collapse
Affiliation(s)
- Christine H Foyer
- School of Biosciences, College of Life and Environmental Sciences, University of Birmingham, Edgbaston, B15 2TT, United Kingdom
| | - Karl Kunert
- Department of Plant Sciences, FABI, University of Pretoria, Pretoria, 2001, South Africa
| |
Collapse
|
2
|
Mishra V, Gahlowt P, Singh S, Dubey NK, Singh SP, Tripathi DK, Singh VP. GABA: a key player of abiotic stress regulation. Plant Signal Behav 2023; 18:2163343. [PMID: 36655720 PMCID: PMC9858539 DOI: 10.1080/15592324.2022.2163343] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/22/2022] [Revised: 12/07/2022] [Accepted: 12/23/2022] [Indexed: 05/27/2023]
Abstract
Abiotic stress is considered as the main culprit for reduction of global food production. Recent studies have reported GABA as a major regulator of abiotic stress and thus opening new avenues in research on emerging roles of GABA in abiotic stress acclimation in plants.
Collapse
Affiliation(s)
- Vipul Mishra
- Plant Physiology Laboratory, Department of Botany, C.M.P. Degree College, a Constituent Post Graduate College of University of Allahabad, Prayagraj, India
| | - Priya Gahlowt
- Plant Physiology Laboratory, Department of Botany, C.M.P. Degree College, a Constituent Post Graduate College of University of Allahabad, Prayagraj, India
| | - Samiksha Singh
- Department of Botany, S.N. Sen B.V. P.G. College, Kanpur, India
| | - Nawal Kishore Dubey
- Centre of Advanced Studies in Botany, Institute of Science, Banaras Hindu University, Varanasi, India
| | - Surendra Pratap Singh
- Plant Molecular Biology Laboratory, Department of Botany, Dayanand Anglo-Vedic (PG) College, Chhatrapati Shahu Ji Maharaj University, Kanpur, India
| | - Durgesh Kumar Tripathi
- Crop Nanobiology and Molecular Stress Physiology Lab, Amity Institute of Organic Agriculture (AIOA), Amity University Uttar Pradesh, Noida, India
| | - Vijay Pratap Singh
- Plant Physiology Laboratory, Department of Botany, C.M.P. Degree College, a Constituent Post Graduate College of University of Allahabad, Prayagraj, India
| |
Collapse
|
3
|
Szlachtowska Z, Rurek M. Plant dehydrins and dehydrin-like proteins: characterization and participation in abiotic stress response. Front Plant Sci 2023; 14:1213188. [PMID: 37484455 PMCID: PMC10358736 DOI: 10.3389/fpls.2023.1213188] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/27/2023] [Accepted: 06/12/2023] [Indexed: 07/25/2023]
Abstract
Abiotic stress has a significant impact on plant growth and development. It causes changes in the subcellular organelles, which, due to their stress sensitivity, can be affected. Cellular components involved in the abiotic stress response include dehydrins, widely distributed proteins forming a class II of late embryogenesis abundant protein family with characteristic properties including the presence of evolutionarily conserved sequence motifs (including lysine-rich K-segment, N-terminal Y-segment, and often phosphorylated S motif) and high hydrophilicity and disordered structure in the unbound state. Selected dehydrins and few poorly characterized dehydrin-like proteins participate in cellular stress acclimation and are also shown to interact with organelles. Through their functioning in stabilizing biological membranes and binding reactive oxygen species, dehydrins and dehydrin-like proteins contribute to the protection of fragile organellar structures under adverse conditions. Our review characterizes the participation of plant dehydrins and dehydrin-like proteins (including some organellar proteins) in plant acclimation to diverse abiotic stress conditions and summarizes recent updates on their structure (the identification of dehydrin less conserved motifs), classification (new proposed subclasses), tissue- and developmentally specific accumulation, and key cellular activities (including organellar protection under stress acclimation). Recent findings on the subcellular localization (with emphasis on the mitochondria and plastids) and prospective applications of dehydrins and dehydrin-like proteins in functional studies to alleviate the harmful stress consequences by means of plant genetic engineering and a genome editing strategy are also discussed.
Collapse
|
4
|
Spät P, Krauspe V, Hess WR, Maček B, Nalpas N. Deep Proteogenomics of a Photosynthetic Cyanobacterium. J Proteome Res 2023. [PMID: 37146978 DOI: 10.1021/acs.jproteome.3c00065] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
Cyanobacteria, the evolutionary ancestors of plant chloroplasts, contribute substantially to the Earth's biogeochemical cycles and are of great interest for a sustainable economy. Knowledge of protein expression is the key to understanding cyanobacterial metabolism; however, proteome studies in cyanobacteria are limited and cover only a fraction of the theoretical proteome. Here, we performed a comprehensive proteogenomic analysis of the model cyanobacterium Synechocystis sp. PCC 6803 to characterize the expressed (phospho)proteome, re-annotate known and discover novel open reading frames (ORFs). By mapping extensive shotgun mass spectrometry proteomics data onto a six-frame translation of the Synechocystis genome, we refined the genomic annotation of 64 ORFs, including eight completely novel ORFs. Our study presents the largest reported (phospho)proteome dataset for a unicellular cyanobacterium, covering the expression of about 80% of the theoretical proteome under various cultivation conditions, such as nitrogen or carbon limitation. We report 568 phosphorylated S/T/Y sites that are present on numerous regulatory proteins, including the transcriptional regulators cyAbrB1 and cyAbrB2. We also catalogue the proteins that have never been detected under laboratory conditions and found that a large portion of them is plasmid-encoded. This dataset will serve as a resource, providing dedicated information on growth condition-dependent protein expression and phosphorylation.
Collapse
Affiliation(s)
- Philipp Spät
- Quantitative Proteomics, Interfaculty Institute of Cell Biology, University of Tuebingen, Auf der Morgenstelle 15, 72076 Tübingen, Germany
| | - Vanessa Krauspe
- Genetics & Experimental Bioinformatics, Institute of Biology III, University of Freiburg, Schänzlestraße 1, 79104 Freiburg im Breisgau, Germany
| | - Wolfgang R Hess
- Genetics & Experimental Bioinformatics, Institute of Biology III, University of Freiburg, Schänzlestraße 1, 79104 Freiburg im Breisgau, Germany
| | - Boris Maček
- Quantitative Proteomics, Interfaculty Institute of Cell Biology, University of Tuebingen, Auf der Morgenstelle 15, 72076 Tübingen, Germany
| | - Nicolas Nalpas
- Quantitative Proteomics, Interfaculty Institute of Cell Biology, University of Tuebingen, Auf der Morgenstelle 15, 72076 Tübingen, Germany
| |
Collapse
|
5
|
Xu F, Asghar MA. Editorial: Seed-environment interactions. Front Plant Sci 2023; 14:1201047. [PMID: 37215288 PMCID: PMC10195042 DOI: 10.3389/fpls.2023.1201047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2023] [Accepted: 04/21/2023] [Indexed: 05/24/2023]
Affiliation(s)
- Fei Xu
- Applied Biotechnology Center, Wuhan University of Bioengineering, Wuhan, China
| | - Muhammad Ahsan Asghar
- Department of Biological Resources, Agricultural Institute, Centre for Agricultural Research, ELKH, Martonvásár, Hungary
| |
Collapse
|
6
|
Downey KM, Judy KJ, Pinseel E, Alverson AJ, Lewis JA. The dynamic response to hypoosmotic stress reveals distinct stages of freshwater acclimation by a euryhaline diatom. Mol Ecol 2022; 32:2766-2783. [PMID: 36151935 DOI: 10.1111/mec.16703] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Revised: 09/13/2022] [Accepted: 09/15/2022] [Indexed: 11/30/2022]
Abstract
The salinity gradient separating marine and freshwater environments is a major ecological divide, and the mechanisms by which most organisms adapt to new salinity environments are poorly understood. Diatoms are a lineage of ancestrally marine microalgae that have repeatedly colonized and diversified in freshwaters. Cyclotella cryptica is a euryhaline diatom found in salinities ranging from fully freshwater to fully marine, thus providing a powerful system for understanding the genomic mechanisms for mitigating and acclimating to low salinity. To understand how diatoms mitigate acute hypoosmotic stress, we abruptly shifted C. cryptica from seawater to freshwater and performed transcriptional profiling during the first 10 hours. Freshwater shock dramatically remodeled the transcriptome, with ~50% of the genome differentially expressed in at least one time point. The peak response occurred within 1 hour, with strong repression of genes involved in cell growth and osmolyte production, and strong induction of specific stress defense genes. Transcripts largely returned to baseline levels within 4-10 hours, with growth resuming shortly thereafter, suggesting that gene expression dynamics may be useful for predicting acclimation. Moreover, comparison to a transcriptomics study of C. cryptica following months-long acclimation to freshwater revealed little overlap between the genes and processes differentially expressed in cells exposed to acute stress versus fully acclimated conditions. Altogether, this study highlights the power of time-resolved transcriptomics to reveal fundamental insights into how cells dynamically respond to an acute environmental shift and provides new insights into how diatoms mitigate natural salinity fluctuations and have successfully diversified across freshwater habitats worldwide.
Collapse
Affiliation(s)
- Kala M Downey
- University of Arkansas, Department of Biological Sciences, Fayetteville, AR, USA
| | - Kathryn J Judy
- University of Arkansas, Department of Biological Sciences, Fayetteville, AR, USA
| | - Eveline Pinseel
- University of Arkansas, Department of Biological Sciences, Fayetteville, AR, USA
| | - Andrew J Alverson
- University of Arkansas, Department of Biological Sciences, Fayetteville, AR, USA
| | - Jeffrey A Lewis
- University of Arkansas, Department of Biological Sciences, Fayetteville, AR, USA
| |
Collapse
|
7
|
Meng X, Li L, Narsai R, De Clercq I, Whelan J, Berkowitz O. Mitochondrial signalling is critical for acclimation and adaptation to flooding in Arabidopsis thaliana. Plant J 2020; 103:227-247. [PMID: 32064696 DOI: 10.1111/tpj.14724] [Citation(s) in RCA: 43] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2019] [Revised: 01/23/2020] [Accepted: 02/04/2020] [Indexed: 05/23/2023]
Abstract
Mitochondria have critical functions in the acclimation to abiotic and biotic stresses. Adverse environmental conditions lead to increased demands in energy supply and metabolic intermediates, which are provided by mitochondrial ATP production and the tricarboxylic acid (TCA) cycle. Mitochondria also play a role as stress sensors to adjust nuclear gene expression via retrograde signalling with the transcription factor (TF) ANAC017 and the kinase CDKE1 key components to integrate various signals into this pathway. To determine the importance of mitochondria as sensors of stress and their contribution in the tolerance to adverse growth conditions, a comparative phenotypical, physiological and transcriptomic characterisation of Arabidopsis mitochondrial signalling mutants (cdke1/rao1 and anac017/rao2) and a set of contrasting accessions was performed after applying the complex compound stress of submergence. Our results showed that impaired mitochondrial retrograde signalling leads to increased sensitivity to the stress treatments. The multi-factorial approach identified a network of 702 co-expressed genes, including several WRKY TFs, overlapping in the transcriptional responses in the mitochondrial signalling mutants and stress-sensitive accessions. Functional characterisation of two WRKY TFs (WRKY40 and WRKY45), using both knockout and overexpressing lines, confirmed their role in conferring tolerance to submergence. Together, the results revealed that acclimation to submergence is dependent on mitochondrial retrograde signalling, and underlying transcriptional re-programming is used as an adaptation mechanism.
Collapse
Affiliation(s)
- Xiangxiang Meng
- Department of Animal, Plant and Soil Science, ARC Centre of Excellence in Plant Energy Biology, La Trobe University, Bundoora, Victoria, 3086, Australia
| | - Lu Li
- Department of Animal, Plant and Soil Science, ARC Centre of Excellence in Plant Energy Biology, La Trobe University, Bundoora, Victoria, 3086, Australia
| | - Reena Narsai
- Department of Animal, Plant and Soil Science, ARC Centre of Excellence in Plant Energy Biology, La Trobe University, Bundoora, Victoria, 3086, Australia
| | - Inge De Clercq
- Department of Animal, Plant and Soil Science, ARC Centre of Excellence in Plant Energy Biology, La Trobe University, Bundoora, Victoria, 3086, Australia
- Department of Plant Biotechnology and Bioinformatics, Ghent University, Technologiepark 927, 9052, Ghent, Belgium
- VIB Center for Plant Systems Biology, Technologiepark 927, 9052, Ghent, Belgium
| | - James Whelan
- Department of Animal, Plant and Soil Science, ARC Centre of Excellence in Plant Energy Biology, La Trobe University, Bundoora, Victoria, 3086, Australia
| | - Oliver Berkowitz
- Department of Animal, Plant and Soil Science, ARC Centre of Excellence in Plant Energy Biology, La Trobe University, Bundoora, Victoria, 3086, Australia
| |
Collapse
|
8
|
Beaugelin I, Chevalier A, D'Alessandro S, Ksas B, Havaux M. Endoplasmic reticulum-mediated unfolded protein response is an integral part of singlet oxygen signalling in plants. Plant J 2020; 102:1266-1280. [PMID: 31975462 DOI: 10.1111/tpj.14700] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2019] [Revised: 01/07/2020] [Accepted: 01/13/2020] [Indexed: 05/19/2023]
Abstract
Singlet oxygen (1 O2 ) is a by-product of photosynthesis that triggers a signalling pathway leading to stress acclimation or to cell death. By analyzing gene expressions in a 1 O2 -overproducing Arabidopsis mutant (ch1) under different light regimes, we show here that the 1 O2 signalling pathway involves the endoplasmic reticulum (ER)-mediated unfolded protein response (UPR). ch1 plants in low light exhibited a moderate activation of UPR genes, in particular bZIP60, and low concentrations of the UPR-inducer tunicamycin enhanced tolerance to photooxidative stress, together suggesting a role for UPR in plant acclimation to low 1 O2 levels. Exposure of ch1 to high light stress ultimately leading to cell death resulted in a marked upregulation of the two UPR branches (bZIP60/IRE1 and bZIP28/bZIP17). Accordingly, mutational suppression of bZIP60 and bZIP28 increased plant phototolerance, and a strong UPR activation by high tunicamycin concentrations promoted high light-induced cell death. Conversely, light acclimation of ch1 to 1 O2 stress put a limitation in the high light-induced expression of UPR genes, except for the gene encoding the BIP3 chaperone, which was selectively upregulated. BIP3 deletion enhanced Arabidopsis photosensitivity while plants treated with a chemical chaperone exhibited enhanced phototolerance. In conclusion, 1 O2 induces the ER-mediated UPR response that fulfils a dual role in high light stress: a moderate UPR, with selective induction of BIP3, is part of the acclimatory response to 1 O2 , and a strong activation of the whole UPR is associated with cell death.
Collapse
Affiliation(s)
- Inès Beaugelin
- Aix-Marseille University, CNRS, CEA, 13108, Saint-Paul-lez-Durance, France
| | - Anne Chevalier
- Aix-Marseille University, CNRS, CEA, 13108, Saint-Paul-lez-Durance, France
| | | | - Brigitte Ksas
- Aix-Marseille University, CNRS, CEA, 13108, Saint-Paul-lez-Durance, France
| | - Michel Havaux
- Aix-Marseille University, CNRS, CEA, 13108, Saint-Paul-lez-Durance, France
| |
Collapse
|
9
|
Abstract
Plants grow and transpire water during the day and night. Recent work highlights the idea that night-time transpirational water loss is a consequence of allowing respiratory CO2 to escape at sufficiently high rates through stomata. Respiration fuels night-time leaf expansion and requires carbohydrates produced during the day. As carbohydrate availability and growth are under the control of the plants' internal clock, so is night-time transpiration. The cost of night-time transpiration is that water is lost without carbon being gained, the benefit is a higher efficiency of taken up water for use in leaf expansion. This could provide a stress acclimation process.
Collapse
Affiliation(s)
- Wieland Fricke
- School of Biology and Environmental Sciences, University College Dublin, Belfield, Dublin 4, Ireland; https://people.ucd.ie/wieland.fricke.
| |
Collapse
|
10
|
Jacob P, Hirt H, Bendahmane A. The heat-shock protein/chaperone network and multiple stress resistance. Plant Biotechnol J 2017; 15:405-414. [PMID: 27860233 PMCID: PMC5362687 DOI: 10.1111/pbi.12659] [Citation(s) in RCA: 335] [Impact Index Per Article: 47.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2016] [Revised: 10/25/2016] [Accepted: 11/03/2016] [Indexed: 05/18/2023]
Abstract
Crop yield has been greatly enhanced during the last century. However, most elite cultivars are adapted to temperate climates and are not well suited to more stressful conditions. In the context of climate change, stress resistance is a major concern. To overcome these difficulties, scientists may help breeders by providing genetic markers associated with stress resistance. However, multistress resistance cannot be obtained from the simple addition of single stress resistance traits. In the field, stresses are unpredictable and several may occur at once. Consequently, the use of single stress resistance traits is often inadequate. Although it has been historically linked with the heat stress response, the heat-shock protein (HSP)/chaperone network is a major component of multiple stress responses. Among the HSP/chaperone 'client proteins', many are primary metabolism enzymes and signal transduction components with essential roles for the proper functioning of a cell. HSPs/chaperones are controlled by the action of diverse heat-shock factors, which are recruited under stress conditions. In this review, we give an overview of the regulation of the HSP/chaperone network with a focus on Arabidopsis thaliana. We illustrate the role of HSPs/chaperones in regulating diverse signalling pathways and discuss several basic principles that should be considered for engineering multiple stress resistance in crops through the HSP/chaperone network.
Collapse
Affiliation(s)
- Pierre Jacob
- Institute of Plant Science—Paris‐SaclayOrsayFrance
| | - Heribert Hirt
- Center for Desert AgricultureKing Abdullah University of Science and TechnologyThuwalSaudi Arabia
| | | |
Collapse
|
11
|
Xiong J, Tao T, Luo Z, Yan S, Liu Y, Yu X, Liu G, Xia H, Luo L. RNA Editing Responses to Oxidative Stress between a Wild Abortive Type Male-Sterile Line and Its Maintainer Line. Front Plant Sci 2017; 8:2023. [PMID: 29234339 PMCID: PMC5712406 DOI: 10.3389/fpls.2017.02023] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2017] [Accepted: 11/14/2017] [Indexed: 05/13/2023]
Abstract
RNA editing of mitochondrial gene transcripts plays a central role during plant development and evolutionary adaptation. RNA editing has previously been reported to differ between the rice cytoplasmic male sterile (CMS) line and its maintainer line, which has been suggested as a cause for their different performances under environmental stress. To specifically test this hypothesis, a wild abortive (WA) CMS line (Huhan-1A) and its maintainer line (Huhan-1B) were utilized to investigate performances in response to oxidative stress, as well as RNA editing efficiencies on transcripts of six selected mitochondrial genes. Compared to the maintainer line, Huhan-1A represented both lower plant height and total antioxidant capacity, possessed higher total soluble protein and chlorophyll contents, accumulated less H2O2 content on the 3rd day after treatment (DAT), and exhibited higher survival ratio after re-watering. Furthermore, a total of 90 editing sites were detected on transcripts of six mitochondrial genes (atp9, nad2, nad7, nad9, ccmB, and ccmC) in both Huhan-1A and Huhan-1B on the 0, 1st, and 3rd DAT. Forty-eight sites were furthermore determined as stress-responsive sites (SRS). Generally, in response to oxidative stress, SRS in Huhan-1A increased the resulting editing efficiencies, while SRS in Huhan-1B decreased the resulting editing efficiencies. In addition, 33 and 22 sites at ccmB and ccmC were differentially edited between Huhan-1A and Huhan-1B, respectively, on the 0, 1st, and 3rd DAT. Editing efficiencies of ccmB and ccmC were generally lower in Huhan-1A (ccmB, 37.3-47.8%; ccmC, 41.2-52.3%) than those in Huhan-1B (ccmB, 82.6-86.5%; ccmC, 81.0-82.9%). Deficiencies of RNA editing in Huhan-1A at ccmB and ccmC could lead to the loss of transmembrane domains in their protein structures. Consequently, differences in RNA editing at ccmB and ccmC between the WA-CMS line and its maintainer line partially explained their different performances under stress. Moreover, we detected differences in expressions of pentatricopeptide repeat (PPR) genes between both lines, as well as significant correlations with RNA editing. Our study indicated potential associations of RNA editing and PPR genes in rice tolerance to abiotic stresses. However, the underlying molecular mechanisms of stress-adaptation, which are attributed to RNA editing on transcripts of mitochondrial genes, require further investigation.
Collapse
Affiliation(s)
- Jie Xiong
- College of Plant Sciences and Technology, Huazhong Agricultural University, Wuhan, China
- Shanghai Agrobiological Gene Center, Shanghai, China
| | - Tao Tao
- College of Plant Sciences and Technology, Huazhong Agricultural University, Wuhan, China
- Shanghai Agrobiological Gene Center, Shanghai, China
| | - Zhi Luo
- College of Plant Sciences and Technology, Huazhong Agricultural University, Wuhan, China
- Shanghai Agrobiological Gene Center, Shanghai, China
| | - Shuaigang Yan
- College of Plant Sciences and Technology, Huazhong Agricultural University, Wuhan, China
- Shanghai Agrobiological Gene Center, Shanghai, China
| | - Yi Liu
- College of Plant Sciences and Technology, Huazhong Agricultural University, Wuhan, China
- Shanghai Agrobiological Gene Center, Shanghai, China
| | - Xinqiao Yu
- Shanghai Agrobiological Gene Center, Shanghai, China
| | - Guolan Liu
- Shanghai Agrobiological Gene Center, Shanghai, China
| | - Hui Xia
- Shanghai Agrobiological Gene Center, Shanghai, China
- *Correspondence: Hui Xia
| | - Lijun Luo
- College of Plant Sciences and Technology, Huazhong Agricultural University, Wuhan, China
- Shanghai Agrobiological Gene Center, Shanghai, China
- Lijun Luo
| |
Collapse
|
12
|
Maršálová L, Vítámvás P, Hynek R, Prášil IT, Kosová K. Proteomic Response of Hordeum vulgare cv. Tadmor and Hordeum marinum to Salinity Stress: Similarities and Differences between a Glycophyte and a Halophyte. Front Plant Sci 2016; 7:1154. [PMID: 27536311 PMCID: PMC4971088 DOI: 10.3389/fpls.2016.01154] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/26/2016] [Accepted: 07/19/2016] [Indexed: 05/29/2023]
Abstract
Response to a high salinity treatment of 300 mM NaCl was studied in a cultivated barley Hordeum vulgare Syrian cultivar Tadmor and in a halophytic wild barley H. marinum. Differential salinity tolerance of H. marinum and H. vulgare is underlied by qualitative and quantitative differences in proteins involved in a variety of biological processes. The major aim was to identify proteins underlying differential salinity tolerance between the two barley species. Analyses of plant water content, osmotic potential and accumulation of proline and dehydrin proteins under high salinity revealed a relatively higher water saturation deficit in H. marinum than in H. vulgare while H. vulgare had lower osmotic potential corresponding with high levels of proline and dehydrins. Analysis of proteins soluble upon boiling isolated from control and salt-treated crown tissues revealed similarities as well as differences between H. marinum and H. vulgare. The similar salinity responses of both barley species lie in enhanced levels of stress-protective proteins such as defense-related proteins from late-embryogenesis abundant family, several chaperones from heat shock protein family, and others such as GrpE. However, there have also been found significant differences between H. marinum and H. vulgare salinity response indicating an active stress acclimation in H. marinum while stress damage in H. vulgare. An active acclimation to high salinity in H. marinum is underlined by enhanced levels of several stress-responsive transcription factors from basic leucine zipper and nascent polypeptide-associated complex families. In salt-treated H. marinum, enhanced levels of proteins involved in energy metabolism such as glycolysis, ATP metabolism, and photosynthesis-related proteins indicate an active acclimation to enhanced energy requirements during an establishment of novel plant homeostasis. In contrast, changes at proteome level in salt-treated H. vulgare indicate plant tissue damage as revealed by enhanced levels of proteins involved in proteasome-dependent protein degradation and proteins related to apoptosis. The results of proteomic analysis clearly indicate differential responses to high salinity and provide more profound insight into biological mechanisms underlying salinity response between two barley species with contrasting salinity tolerance.
Collapse
Affiliation(s)
- Lucie Maršálová
- Department of Biochemistry and Microbiology, Faculty of Food and Biochemical Technology, University of Chemistry and TechnologyPrague, Czech Republic
| | - Pavel Vítámvás
- Laboratory of Plant Stress Biology and Biotechnology, Division of Crop Genetics and Breeding, Crop Research InstitutePrague, Czech Republic
| | - Radovan Hynek
- Department of Biochemistry and Microbiology, Faculty of Food and Biochemical Technology, University of Chemistry and TechnologyPrague, Czech Republic
| | - Ilja T. Prášil
- Laboratory of Plant Stress Biology and Biotechnology, Division of Crop Genetics and Breeding, Crop Research InstitutePrague, Czech Republic
| | - Klára Kosová
- Laboratory of Plant Stress Biology and Biotechnology, Division of Crop Genetics and Breeding, Crop Research InstitutePrague, Czech Republic
| |
Collapse
|
13
|
Abstract
Carotenoids are known to play important roles in plants as antioxidants, accessory light-harvesting pigments, and attractants for pollinators and seed dispersers. A new function for carotenoids has recently emerged, which relates to the response of plants to environmental stresses. Reactive oxygen species, especially singlet oxygen, produced in the chloroplasts under stress conditions, can oxidize carotenoids leading to a variety of oxidized products, including aldehydes, ketones, endoperoxides and lactones. Some of those carotenoid derivatives, such as volatile β-cyclocitral, derived from the oxidation of β-carotene, are reactive electrophile species that are bioactive and can induce changes in gene expression leading to acclimation to stress conditions. This review summarizes the current knowledge on the non-enzymatic oxidation of carotenoids, the bioactivity of the resulting cleavage compounds and their functions as stress signals in plants.
Collapse
Affiliation(s)
- Michel Havaux
- Laboratoire d'Ecophysiologie Moléculaire des Plantes, CEA, DSV, IBEB, F-13108, Saint-Paul-lez-Durance, France; CNRS, UMR 7265 Biologie Végétale et Microbiologie Environnementales, F-13108, Saint-Paul-lez-Durance, France; Aix-Marseille Université, F-13108, Saint-Paul-lez-Durance, France
| |
Collapse
|
14
|
Šimková K, Kim C, Gacek K, Baruah A, Laloi C, Apel K. The chloroplast division mutant caa33 of Arabidopsis thaliana reveals the crucial impact of chloroplast homeostasis on stress acclimation and retrograde plastid-to-nucleus signaling. Plant J 2012; 69:701-12. [PMID: 22014227 PMCID: PMC3274639 DOI: 10.1111/j.1365-313x.2011.04825.x] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Retrograde plastid-to-nucleus signaling tightly controls and coordinates the nuclear and plastid gene expression that is required for plastid biogenesis and chloroplast activity. As chloroplasts act as sensors of environmental changes, plastid-derived signaling also modulates stress responses of plants by transferring stress-related signals and altering nuclear gene expression. Various mutant screens have been undertaken to identify constituents of plastid signaling pathways. Almost all mutations identified in these screens target plastid-specific but not extraplastidic functions. They have been suggested to define either genuine constituents of retrograde signaling pathways or components required for the synthesis of plastid signals. Here we report the characterization of the constitutive activator of AAA-ATPase (caa33) mutant, which reveals another way of how mutations that affect plastid functions may modulate retrograde plastid signaling. caa33 disturbs a plastid-specific function by impeding plastid division, and thereby perturbing plastid homeostasis. This results in preconditioning plants by activating the expression of stress genes, enhancing pathogen resistance and attenuating the capacity of the plant to respond to plastid signals. Our study reveals an intimate link between chloroplast activity and the susceptibility of the plant to stress, and emphasizes the need to consider the possible impact of preconditioning on retrograde plastid-to-nucleus signaling.
Collapse
Affiliation(s)
- Klára Šimková
- ETH Zurich, Institute of Plant Sciences, Switzerland
| | - Chanhong Kim
- Boyce Thompson Institute for Plant Research, Ithaca NY, USA
| | | | - Aiswarya Baruah
- ETH Zurich, Institute of Plant Sciences, Switzerland
- Boyce Thompson Institute for Plant Research, Ithaca NY, USA
| | - Christophe Laloi
- ETH Zurich, Institute of Plant Sciences, Switzerland
- Aix-Marseille Université, Lab Genet Biophys Plantes, Marseille, F-13009, France
- CNRS, UMR Biol Veget & Microbiol Environ, Marseille, F-13009, France
- CEA, DSV, IBEB, Marseille, F-13009, France
| | - Klaus Apel
- ETH Zurich, Institute of Plant Sciences, Switzerland
- Boyce Thompson Institute for Plant Research, Ithaca NY, USA
- Corresponding author: Klaus Apel, Boyce Thompson Institute for Plant Research, Tower Road, Ithaca, NY-14853-1801, USA. Tel.: 001-6072797734; ; Fax: 001-6072541242
| |
Collapse
|