1
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Rankenberg T, van Veen H, Sedaghatmehr M, Liao CY, Devaiah MB, Stouten EA, Balazadeh S, Sasidharan R. Differential leaf flooding resilience in Arabidopsis thaliana is controlled by ethylene signaling-activated and age-dependent phosphorylation of ORESARA1. PLANT COMMUNICATIONS 2024; 5:100848. [PMID: 38379284 DOI: 10.1016/j.xplc.2024.100848] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2023] [Revised: 01/19/2024] [Accepted: 02/18/2024] [Indexed: 02/22/2024]
Abstract
The phytohormone ethylene is a major regulator of plant adaptive responses to flooding. In flooded plant tissues, ethylene quickly increases to high concentrations owing to its low solubility and diffusion rates in water. Ethylene accumulation in submerged plant tissues makes it a reliable cue for triggering flood acclimation responses, including metabolic adjustments to cope with flood-induced hypoxia. However, persistent ethylene accumulation also accelerates leaf senescence. Stress-induced senescence hampers photosynthetic capacity and stress recovery. In submerged Arabidopsis, senescence follows a strict age-dependent pattern starting with the older leaves. Although mechanisms underlying ethylene-mediated senescence have been uncovered, it is unclear how submerged plants avoid indiscriminate breakdown of leaves despite high systemic ethylene accumulation. We demonstrate that although submergence triggers leaf-age-independent activation of ethylene signaling via EIN3 in Arabidopsis, senescence is initiated only in old leaves. EIN3 stabilization also leads to overall transcript and protein accumulation of the senescence-promoting transcription factor ORESARA1 (ORE1) in both old and young leaves during submergence. However, leaf-age-dependent senescence can be explained by ORE1 protein activation via phosphorylation specifically in old leaves, independent of the previously identified age-dependent control of ORE1 via miR164. A systematic analysis of the roles of the major flooding stress cues and signaling pathways shows that only the combination of ethylene and darkness is sufficient to mimic submergence-induced senescence involving ORE1 accumulation and phosphorylation. Hypoxia, most often associated with flooding stress in plants, appears to have no role in these processes. Our results reveal a mechanism by which plants regulate the speed and pattern of senescence during environmental stresses such as flooding. Age-dependent ORE1 activity ensures that older, expendable leaves are dismantled first, thus prolonging the life of younger leaves and meristematic tissues that are vital to whole-plant survival.
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Affiliation(s)
- Tom Rankenberg
- Plant Stress Resilience, Utrecht University, Padualaan 8, 3584 CH Utrecht, the Netherlands
| | - Hans van Veen
- Plant Stress Resilience, Utrecht University, Padualaan 8, 3584 CH Utrecht, the Netherlands; Evolutionary Plant-Ecophysiology, Groningen Institute for Evolutionary LIfe Sciences, Nijenborgh 7, 9747 AG Groningen, the Netherlands
| | - Mastoureh Sedaghatmehr
- Max Planck Institute of Molecular Plant Physiology, Am Mühlenberg 1, 14476 Potsdam, Germany
| | - Che-Yang Liao
- Experimental and Computational Plant Development, Utrecht University, Padualaan 8, 3584 CH Utrecht, the Netherlands
| | - Muthanna Biddanda Devaiah
- Experimental and Computational Plant Development, Utrecht University, Padualaan 8, 3584 CH Utrecht, the Netherlands
| | - Evelien A Stouten
- Plant Stress Resilience, Utrecht University, Padualaan 8, 3584 CH Utrecht, the Netherlands
| | | | - Rashmi Sasidharan
- Plant Stress Resilience, Utrecht University, Padualaan 8, 3584 CH Utrecht, the Netherlands.
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2
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Perri M, Licausi F. Thiol dioxygenases: from structures to functions. Trends Biochem Sci 2024; 49:545-556. [PMID: 38622038 DOI: 10.1016/j.tibs.2024.03.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2023] [Revised: 03/07/2024] [Accepted: 03/15/2024] [Indexed: 04/17/2024]
Abstract
Thiol oxidation to dioxygenated sulfinic acid is catalyzed by an enzyme family characterized by a cupin fold. These proteins act on free thiol-containing molecules to generate central metabolism precursors and signaling compounds in bacteria, fungi, and animal cells. In plants and animals, they also oxidize exposed N-cysteinyl residues, directing proteins to proteolysis. Enzyme kinetics, X-ray crystallography, and spectroscopy studies prompted the formulation and testing of hypotheses about the mechanism of action and the different substrate specificity of these enzymes. Concomitantly, the physiological role of thiol dioxygenation in prokaryotes and eukaryotes has been studied through genetic and physiological approaches. Further structural characterization is necessary to enable precise and safe manipulation of thiol dioxygenases (TDOs) for therapeutic, industrial, and agricultural applications.
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Affiliation(s)
- Monica Perri
- Plant Molecular Biology Section, Department of Biology, University of Oxford, Oxford, UK
| | - Francesco Licausi
- Plant Molecular Biology Section, Department of Biology, University of Oxford, Oxford, UK.
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3
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Eysholdt-Derzsó E, Hause B, Sauter M, Schmidt-Schippers RR. Hypoxia reshapes Arabidopsis root architecture by integrating ERF-VII factor response and abscisic acid homoeostasis. PLANT, CELL & ENVIRONMENT 2024. [PMID: 38616485 DOI: 10.1111/pce.14914] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2023] [Revised: 04/02/2024] [Accepted: 04/04/2024] [Indexed: 04/16/2024]
Abstract
Oxygen limitation (hypoxia), arising as a key stress factor due to flooding, negatively affects plant development. Consequently, maintaining root growth under such stress is crucial for plant survival, yet we know little about the root system's adaptions to low-oxygen conditions and its regulation by phytohormones. In this study, we examine the impact of hypoxia and, herein, the regulatory role of group VII ETHYLENE-RESPONSE FACTOR (ERFVII) transcription factors on root growth in Arabidopsis. We found lateral root (LR) elongation to be actively maintained by hypoxia via ERFVII factors, as erfVII seedlings possess hypersensitivity towards hypoxia regarding their LR growth. Pharmacological inhibition of abscisic acid (ABA) biosynthesis revealed ERFVII-driven counteraction of hypoxia-induced inhibition of LR formation in an ABA-dependent manner. However, postemergence LR growth under hypoxia mediated by ERFVIIs was independent of ABA. In roots, ERFVIIs mediate, among others, the induction of ABA-degrading ABA 8'-hydroxylases CYP707A1 expression. RAP2.12 could activate the pCYC707A1:LUC reporter gene, indicating, combined with single mutant analyses, that this transcription factor regulates ABA levels through corresponding transcript upregulation. Collectively, hypoxia-induced adaptation of the Arabidopsis root system is shaped by developmental reprogramming, whereby ERFVII-dependent promotion of LR emergence, but not elongation, is partly executed through regulation of ABA degradation.
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Affiliation(s)
| | - Bettina Hause
- Department of Cell and Metabolic Biology, Leibniz Institute of Plant Biochemistry, Halle, Germany
| | - Margret Sauter
- Plant Developmental Biology and Plant Physiology, University of Kiel, Kiel, Germany
| | - Romy R Schmidt-Schippers
- Department of Plant Biotechnology, University of Bielefeld, Institute of Biology, Bielefeld, Germany
- Center for Biotechnology, University of Bielefeld, Bielefeld, Germany
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4
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Liu B, Zheng Y, Lou S, Liu M, Wang W, Feng X, Zhang H, Song Y, Liu H. Coordination between two cis-elements of WRKY33, bound by the same transcription factor, confers humid adaption in Arabidopsis thaliana. PLANT MOLECULAR BIOLOGY 2024; 114:30. [PMID: 38503847 DOI: 10.1007/s11103-024-01428-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2023] [Accepted: 02/19/2024] [Indexed: 03/21/2024]
Abstract
To cope with flooding-induced hypoxia, plants have evolved different strategies. Molecular strategies, such as the N-degron pathway and transcriptional regulation, are known to be crucial for Arabidopsis thaliana's hypoxia response. Our study uncovered a novel molecular strategy that involves a single transcription factor interacting with two identical cis-elements, one located in the promoter region and the other within the intron. This unique double-element adjustment mechanism has seldom been reported in previous studies. In humid areas, WRKY70 plays a crucial role in A. thaliana's adaptation to submergence-induced hypoxia by binding to identical cis-elements in both the promoter and intron regions of WRKY33. This dual binding enhances WRKY33 expression and the activation of hypoxia-related genes. Conversely, in arid regions lacking the promoter cis-element, WRKY70 only binds to the intron cis-element, resulting in limited WRKY33 expression during submergence stress. The presence of a critical promoter cis-element in humid accessions, but not in dry accessions, indicates a coordinated regulation enabling A. thaliana to adapt and thrive in humid habitats.
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Affiliation(s)
- Bao Liu
- Key Laboratory for Bio-resources and Eco-environment & State Key Lab of Hydraulics & Mountain River Engineering, Sichuan Zoige Alpine Wetland Ecosystem National Observation and Research Station, Key Laboratory for Bio-resource and Eco-environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, 610065, China
| | - Yudan Zheng
- Key Laboratory for Bio-resources and Eco-environment & State Key Lab of Hydraulics & Mountain River Engineering, Sichuan Zoige Alpine Wetland Ecosystem National Observation and Research Station, Key Laboratory for Bio-resource and Eco-environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, 610065, China
| | - Shangling Lou
- Key Laboratory for Bio-resources and Eco-environment & State Key Lab of Hydraulics & Mountain River Engineering, Sichuan Zoige Alpine Wetland Ecosystem National Observation and Research Station, Key Laboratory for Bio-resource and Eco-environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, 610065, China
| | - Meng Liu
- Key Laboratory for Bio-resources and Eco-environment & State Key Lab of Hydraulics & Mountain River Engineering, Sichuan Zoige Alpine Wetland Ecosystem National Observation and Research Station, Key Laboratory for Bio-resource and Eco-environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, 610065, China
| | - Weiwei Wang
- Key Laboratory for Bio-resources and Eco-environment & State Key Lab of Hydraulics & Mountain River Engineering, Sichuan Zoige Alpine Wetland Ecosystem National Observation and Research Station, Key Laboratory for Bio-resource and Eco-environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, 610065, China
| | - Xiaoqin Feng
- Key Laboratory for Bio-resources and Eco-environment & State Key Lab of Hydraulics & Mountain River Engineering, Sichuan Zoige Alpine Wetland Ecosystem National Observation and Research Station, Key Laboratory for Bio-resource and Eco-environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, 610065, China
| | - Han Zhang
- Key Laboratory for Bio-resources and Eco-environment & State Key Lab of Hydraulics & Mountain River Engineering, Sichuan Zoige Alpine Wetland Ecosystem National Observation and Research Station, Key Laboratory for Bio-resource and Eco-environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, 610065, China
| | - Yan Song
- Key Laboratory for Bio-resources and Eco-environment & State Key Lab of Hydraulics & Mountain River Engineering, Sichuan Zoige Alpine Wetland Ecosystem National Observation and Research Station, Key Laboratory for Bio-resource and Eco-environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, 610065, China
| | - Huanhuan Liu
- Key Laboratory for Bio-resources and Eco-environment & State Key Lab of Hydraulics & Mountain River Engineering, Sichuan Zoige Alpine Wetland Ecosystem National Observation and Research Station, Key Laboratory for Bio-resource and Eco-environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu, 610065, China.
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5
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Miricescu A, Brazel AJ, Beegan J, Wellmer F, Graciet E. Transcriptional analysis in multiple barley varieties identifies signatures of waterlogging response. PLANT DIRECT 2023; 7:e518. [PMID: 37577136 PMCID: PMC10422865 DOI: 10.1002/pld3.518] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/15/2023] [Revised: 07/17/2023] [Accepted: 07/18/2023] [Indexed: 08/15/2023]
Abstract
Waterlogging leads to major crop losses globally, particularly for waterlogging-sensitive crops such as barley. Waterlogging reduces oxygen availability and results in additional stresses, leading to the activation of hypoxia and stress response pathways that promote plant survival. Although certain barley varieties have been shown to be more tolerant to waterlogging than others and some tolerance-related quantitative trait loci have been identified, the molecular mechanisms underlying this trait are mostly unknown. Transcriptomics approaches can provide very valuable information for our understanding of waterlogging tolerance. Here, we surveyed 21 barley varieties for the differential transcriptional activation of conserved hypoxia-response genes under waterlogging and selected five varieties with different levels of induction of core hypoxia-response genes. We further characterized their phenotypic response to waterlogging in terms of shoot and root traits. RNA sequencing to evaluate the genome-wide transcriptional responses to waterlogging of these selected varieties led to the identification of a set of 98 waterlogging-response genes common to the different datasets. Many of these genes are orthologs of the so-called "core hypoxia response genes," thus highlighting the conservation of plant responses to waterlogging. Hierarchical clustering analysis also identified groups of genes with intrinsic differential expression between varieties prior to waterlogging stress. These genes could constitute interesting candidates to study "predisposition" to waterlogging tolerance or sensitivity in barley.
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Affiliation(s)
- Alexandra Miricescu
- Department of BiologyMaynooth UniversityMaynoothIreland
- Pesticide Registration DivisionDepartment of Agriculture, Food and the Marine, Backweston CampusCelbridgeIreland
| | | | - Joseph Beegan
- Smurfit Institute of GeneticsTrinity College DublinDublinIreland
| | - Frank Wellmer
- Smurfit Institute of GeneticsTrinity College DublinDublinIreland
| | - Emmanuelle Graciet
- Department of BiologyMaynooth UniversityMaynoothIreland
- Kathleen Lonsdale Institute for Human Health ResearchMaynooth UniversityMaynoothIreland
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6
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Tan S, Sha Y, Sun L, Li Z. Abiotic Stress-Induced Leaf Senescence: Regulatory Mechanisms and Application. Int J Mol Sci 2023; 24:11996. [PMID: 37569371 PMCID: PMC10418887 DOI: 10.3390/ijms241511996] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Revised: 07/14/2023] [Accepted: 07/19/2023] [Indexed: 08/13/2023] Open
Abstract
Leaf senescence is a natural phenomenon that occurs during the aging process of plants and is influenced by various internal and external factors. These factors encompass plant hormones, as well as environmental pressures such as inadequate nutrients, drought, darkness, high salinity, and extreme temperatures. Abiotic stresses accelerate leaf senescence, resulting in reduced photosynthetic efficiency, yield, and quality. Gaining a comprehensive understanding of the molecular mechanisms underlying leaf senescence in response to abiotic stresses is imperative to enhance the resilience and productivity of crops in unfavorable environments. In recent years, substantial advancements have been made in the study of leaf senescence, particularly regarding the identification of pivotal genes and transcription factors involved in this process. Nevertheless, challenges remain, including the necessity for further exploration of the intricate regulatory network governing leaf senescence and the development of effective strategies for manipulating genes in crops. This manuscript provides an overview of the molecular mechanisms that trigger leaf senescence under abiotic stresses, along with strategies to enhance stress tolerance and improve crop yield and quality by delaying leaf senescence. Furthermore, this review also highlighted the challenges associated with leaf senescence research and proposes potential solutions.
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Affiliation(s)
| | | | - Liwei Sun
- State Key Laboratory of Tree Genetics and Breeding, College of Biological Sciences and Technology, Beijing Forestry University, Beijing 100083, China
| | - Zhonghai Li
- State Key Laboratory of Tree Genetics and Breeding, College of Biological Sciences and Technology, Beijing Forestry University, Beijing 100083, China
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7
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Geldhof B, Pattyn J, Van de Poel B. From a different angle: genetic diversity underlies differentiation of waterlogging-induced epinasty in tomato. FRONTIERS IN PLANT SCIENCE 2023; 14:1178778. [PMID: 37324684 PMCID: PMC10264670 DOI: 10.3389/fpls.2023.1178778] [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: 03/03/2023] [Accepted: 05/04/2023] [Indexed: 06/17/2023]
Abstract
In tomato, downward leaf bending is a morphological adaptation towards waterlogging, which has been shown to induce a range of metabolic and hormonal changes. This kind of functional trait is often the result of a complex interplay of regulatory processes starting at the gene level, gated through a plethora of signaling cascades and modulated by environmental cues. Through phenotypical screening of a population of 54 tomato accessions in a Genome Wide Association Study (GWAS), we have identified target genes potentially involved in plant growth and survival during waterlogging and subsequent recovery. Changes in both plant growth rate and epinastic descriptors revealed several associations to genes possibly supporting metabolic activity in low oxygen conditions in the root zone. In addition to this general reprogramming, some of the targets were specifically associated to leaf angle dynamics, indicating these genes might play a role in the induction, maintenance or recovery of differential petiole elongation in tomato during waterlogging.
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Affiliation(s)
- Batist Geldhof
- Molecular Plant Hormone Physiology Lab, Division of Crop Biotechnics, Department of Biosystems, KU Leuven, Leuven, Belgium
| | - Jolien Pattyn
- Molecular Plant Hormone Physiology Lab, Division of Crop Biotechnics, Department of Biosystems, KU Leuven, Leuven, Belgium
| | - Bram Van de Poel
- Molecular Plant Hormone Physiology Lab, Division of Crop Biotechnics, Department of Biosystems, KU Leuven, Leuven, Belgium
- KU Leuven Plant Institute (LPI), KU Leuven, Leuven, Belgium
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8
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Medina-Chávez L, Camacho C, Martínez-Rodríguez JA, Barrera-Figueroa BE, Nagel DH, Juntawong P, Peña-Castro JM. Submergence Stress Alters the Expression of Clock Genes and Configures New Zeniths and Expression of Outputs in Brachypodium distachyon. Int J Mol Sci 2023; 24:ijms24108555. [PMID: 37239900 DOI: 10.3390/ijms24108555] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Revised: 05/04/2023] [Accepted: 05/08/2023] [Indexed: 05/28/2023] Open
Abstract
Plant networks of oscillating genes coordinate internal processes with external cues, contributing to increased fitness. We hypothesized that the response to submergence stress may dynamically change during different times of the day. In this work, we determined the transcriptome (RNA sequencing) of the model monocotyledonous plant, Brachypodium distachyon, during a day of submergence stress, low light, and normal growth. Two ecotypes of differential tolerance, Bd21 (sensitive) and Bd21-3 (tolerant), were included. We submerged 15-day-old plants under a long-day diurnal cycle (16 h light/8 h dark) and collected samples after 8 h of submergence at ZT0 (dawn), ZT8 (midday), ZT16 (dusk), ZT20 (midnight), and ZT24 (dawn). Rhythmic processes were enriched both with up- and down-regulated genes, and clustering highlighted that the morning and daytime oscillator components (PRRs) show peak expression in the night, and a decrease in the amplitude of the clock genes (GI, LHY, RVE) was observed. Outputs included photosynthesis-related genes losing their known rhythmic expression. Up-regulated genes included oscillating suppressors of growth, hormone-related genes with new late zeniths (e.g., JAZ1, ZEP), and mitochondrial and carbohydrate signaling genes with shifted zeniths. The results highlighted genes up-regulated in the tolerant ecotype such as METALLOTHIONEIN3 and ATPase INHIBITOR FACTOR. Finally, we show by luciferase assays that Arabidopsis thaliana clock genes are also altered by submergence changing their amplitude and phase. This study can guide the research of chronocultural strategies and diurnal-associated tolerance mechanisms.
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Affiliation(s)
- Lucisabel Medina-Chávez
- Centro de Investigaciones Científicas, Instituto de Biotecnología, Universidad del Papaloapan, Tuxtepec 68301, Oaxaca, Mexico
- Programa de Doctorado en Biotecnología, División de Estudios de Posgrado, Universidad del Papaloapan, Tuxtepec 68301, Oaxaca, Mexico
| | - Christian Camacho
- Department of Botany and Plant Sciences, University of California, Riverside, CA 92521, USA
| | - Jorge Arturo Martínez-Rodríguez
- Laboratorio de Biotecnología Vegetal, Instituto de Biotecnología, Universidad del Papaloapan, Tuxtepec 68301, Oaxaca, Mexico
| | - Blanca Estela Barrera-Figueroa
- Centro de Investigaciones Científicas, Instituto de Biotecnología, Universidad del Papaloapan, Tuxtepec 68301, Oaxaca, Mexico
- Laboratorio de Biotecnología Vegetal, Instituto de Biotecnología, Universidad del Papaloapan, Tuxtepec 68301, Oaxaca, Mexico
| | - Dawn H Nagel
- Department of Botany and Plant Sciences, University of California, Riverside, CA 92521, USA
| | - Piyada Juntawong
- Department of Genetics, Faculty of Science, Kasetsart University, Bangkok 10900, Thailand
- Omics Center for Agriculture, Bioresources, Food and Health, Kasetsart University (OmiKU), Bangkok 10900, Thailand
| | - Julián Mario Peña-Castro
- Centro de Investigaciones Científicas, Instituto de Biotecnología, Universidad del Papaloapan, Tuxtepec 68301, Oaxaca, Mexico
- Laboratorio de Biotecnología Vegetal, Instituto de Biotecnología, Universidad del Papaloapan, Tuxtepec 68301, Oaxaca, Mexico
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9
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Dalle Carbonare L, Jiménez JDLC, Lichtenauer S, van Veen H. Plant responses to limited aeration: Advances and future challenges. PLANT DIRECT 2023; 7:e488. [PMID: 36993903 PMCID: PMC10040318 DOI: 10.1002/pld3.488] [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: 12/20/2022] [Revised: 02/21/2023] [Accepted: 02/22/2023] [Indexed: 06/19/2023]
Abstract
Limited aeration that is caused by tissue geometry, diffusion barriers, high elevation, or a flooding event poses major challenges to plants and is often, but not exclusively, associated with low oxygen. These processes span a broad interest in the research community ranging from whole plant and crop responses, post-harvest physiology, plant morphology and anatomy, fermentative metabolism, plant developmental processes, oxygen sensing by ERF-VIIs, gene expression profiles, the gaseous hormone ethylene, and O2 dynamics at cellular resolution. The International Society for Plant Anaerobiosis (ISPA) gathers researchers from all over the world contributing to understand the causes, responses, and consequences of limited aeration in plants. During the 14th ISPA meeting, major research progress was related to the evolution of O2 sensing mechanisms and the intricate network that balances low O2 signaling. Here, the work moved beyond flooding stress and emphasized novel underexplored roles of low O2 and limited aeration in altitude adaptation, fruit development and storage, and the vegetative development of growth apices. Regarding tolerance towards flooding, the meeting stressed the relevance and regulation of developmental plasticity, aerenchyma, and barrier formation to improve internal aeration. Additional newly explored flood tolerance traits concerned resource balance, senescence, and the exploration of natural genetic variation for novel tolerance loci. In this report, we summarize and synthesize the major progress and future challenges for low O2 and aeration research presented at the conference.
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Affiliation(s)
| | | | - Sophie Lichtenauer
- Institute of Plant Biology and BiotechnologyUniversity of MünsterMünsterGermany
| | - Hans van Veen
- Plant Stress Resilience, Institute of Environmental BiologyUtrecht UniversityUtrechtThe Netherlands
- Groningen Institute for Evolutionary Life SciencesUniversity of GroningenGroningenThe Netherlands
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10
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Xie LJ, Wang JH, Liu HS, Yuan LB, Tan YF, Tan WJ, Zhou Y, Chen QF, Qi H, Li JF, Chen YQ, Qiu RL, Chen MX, Xiao S. MYB30 integrates light signals with antioxidant biosynthesis to regulate plant responses during postsubmergence recovery. THE NEW PHYTOLOGIST 2023; 237:2238-2254. [PMID: 36513604 DOI: 10.1111/nph.18674] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2022] [Accepted: 11/29/2022] [Indexed: 06/17/2023]
Abstract
Submergence is an abiotic stress that limits agricultural production world-wide. Plants sense oxygen levels during submergence and postsubmergence reoxygenation and modulate their responses. Increasing evidence suggests that completely submerged plants are often exposed to low-light stress, owing to the depth and turbidity of the surrounding water; however, how light availability affects submergence tolerance remains largely unknown. Here, we showed that Arabidopsis thaliana MYB DOMAIN PROTEIN30 (MYB30) is an important transcription factor that integrates light signaling and postsubmergence stress responses. MYB DOMAIN PROTEIN30 protein abundance decreased upon submergence and accumulated during reoxygenation. Under submergence conditions, CONSTITUTIVE PHOTOMORPHOGENIC1 (COP1), a central regulator of light signaling, caused the ubiquitination and degradation of MYB30. In response to desubmergence, however, light-induced MYB30 interacted with MYC2, a master transcription factor involved in jasmonate signaling, and activated the expression of the VITAMIN C DEFECTIVE1 (VTC1) and GLUTATHIONE SYNTHETASE1 (GSH1) gene families to enhance antioxidant biosynthesis. Consistent with this, the myb30 knockout mutant showed increased sensitivity to submergence, which was partially rescued by overexpression of VTC1 or GSH1. Thus, our findings uncover the mechanism by which the COP1-MYB30 module integrates light signals with cellular oxidative homeostasis to coordinate plant responses to postsubmergence stress.
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Affiliation(s)
- Li-Juan Xie
- Guangdong Laboratory for Lingnan Modern Agriculture, State Key Laboratory of Biocontrol, Guangdong Provincial Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat-sen University, Guangzhou, 510275, China
- Guangdong Provincial Key Laboratory of Agricultural & Rural Pollution Abatement and Environmental Safety, College of Natural Resources and Environment, South China Agricultural University, Guangzhou, 510642, China
| | - Jian-Hong Wang
- Guangdong Laboratory for Lingnan Modern Agriculture, State Key Laboratory of Biocontrol, Guangdong Provincial Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat-sen University, Guangzhou, 510275, China
| | - Hui-Shan Liu
- Guangdong Laboratory for Lingnan Modern Agriculture, State Key Laboratory of Biocontrol, Guangdong Provincial Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat-sen University, Guangzhou, 510275, China
| | - Li-Bing Yuan
- Guangdong Laboratory for Lingnan Modern Agriculture, State Key Laboratory of Biocontrol, Guangdong Provincial Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat-sen University, Guangzhou, 510275, China
| | - Yi-Fang Tan
- Guangdong Laboratory for Lingnan Modern Agriculture, State Key Laboratory of Biocontrol, Guangdong Provincial Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat-sen University, Guangzhou, 510275, China
| | - Wei-Juan Tan
- Guangdong Laboratory for Lingnan Modern Agriculture, State Key Laboratory of Biocontrol, Guangdong Provincial Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat-sen University, Guangzhou, 510275, China
| | - Ying Zhou
- Guangdong Laboratory for Lingnan Modern Agriculture, State Key Laboratory of Biocontrol, Guangdong Provincial Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat-sen University, Guangzhou, 510275, China
| | - Qin-Fang Chen
- Guangdong Laboratory for Lingnan Modern Agriculture, State Key Laboratory of Biocontrol, Guangdong Provincial Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat-sen University, Guangzhou, 510275, China
| | - Hua Qi
- Guangdong Laboratory for Lingnan Modern Agriculture, State Key Laboratory of Biocontrol, Guangdong Provincial Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat-sen University, Guangzhou, 510275, China
- Guangdong Provincial Key Laboratory of Agricultural & Rural Pollution Abatement and Environmental Safety, College of Natural Resources and Environment, South China Agricultural University, Guangzhou, 510642, China
| | - Jian-Feng Li
- Guangdong Laboratory for Lingnan Modern Agriculture, State Key Laboratory of Biocontrol, Guangdong Provincial Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat-sen University, Guangzhou, 510275, China
| | - Yue-Qin Chen
- Guangdong Laboratory for Lingnan Modern Agriculture, State Key Laboratory of Biocontrol, Guangdong Provincial Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat-sen University, Guangzhou, 510275, China
| | - Rong-Liang Qiu
- Guangdong Provincial Key Laboratory of Agricultural & Rural Pollution Abatement and Environmental Safety, College of Natural Resources and Environment, South China Agricultural University, Guangzhou, 510642, China
| | - Mo-Xian Chen
- Guangdong Laboratory for Lingnan Modern Agriculture, State Key Laboratory of Biocontrol, Guangdong Provincial Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat-sen University, Guangzhou, 510275, China
| | - Shi Xiao
- Guangdong Laboratory for Lingnan Modern Agriculture, State Key Laboratory of Biocontrol, Guangdong Provincial Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat-sen University, Guangzhou, 510275, China
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11
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Brazel AJ, Graciet E. Complexity of Abiotic Stress Stimuli: Mimicking Hypoxic Conditions Experimentally on the Basis of Naturally Occurring Environments. Methods Mol Biol 2023; 2642:23-48. [PMID: 36944871 DOI: 10.1007/978-1-0716-3044-0_2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/23/2023]
Abstract
Plants require oxygen to respire and produce energy. Plant cells are exposed to low oxygen levels (hypoxia) in different contexts and have evolved conserved molecular responses to hypoxia. Both environmental and developmental factors can influence intracellular oxygen concentrations. In nature, plants can experience hypoxic conditions when the soil becomes saturated with water following heavy precipitation (i.e., waterlogging). Hypoxia can also arise in specific tissues that have poor gas exchange with atmospheric oxygen. In this case, hypoxic niches that are physiologically and developmentally relevant may form. To dissect the molecular mechanisms underlying the regulation of hypoxia response in plants, a wide range of hypoxia-inducing methods have been used in the laboratory setting. Yet, the different characteristics, pros and cons of each of these hypoxia treatments are seldom compared between methods, and with natural forms of hypoxia. In this chapter, we present both environmental and developmental forms of hypoxia that plants encounter in the wild, as well as the different experimental hypoxia treatments used to mimic them in the laboratory setting, with the aim of informing on what experimental approaches might be most appropriate to the questions addressed, including stress signaling and regulation.
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12
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Santiago-Velasco M, Ortiz-López E, Flores-Méndez A, Barrera-Figueroa BE, García-López E, Peña-Castro JM. Transformation efficiency of Arabidopsis thaliana ecotypes with differential tolerance to submergence stress. ALL LIFE 2022. [DOI: 10.1080/26895293.2022.2124315] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022] Open
Affiliation(s)
- Mayra Santiago-Velasco
- Laboratorio de Biotecnología Vegetal, Instituto de Biotecnología, Universidad del Papaloapan, Oaxaca, México
- División de Estudios de Posgrado, Universidad del Papaloapan, Oaxaca, México
| | - Erick Ortiz-López
- Laboratorio de Biotecnología Vegetal, Instituto de Biotecnología, Universidad del Papaloapan, Oaxaca, México
| | - Alexis Flores-Méndez
- Laboratorio de Biotecnología Vegetal, Instituto de Biotecnología, Universidad del Papaloapan, Oaxaca, México
| | | | | | - Julián Mario Peña-Castro
- Laboratorio de Biotecnología Vegetal, Instituto de Biotecnología, Universidad del Papaloapan, Oaxaca, México
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13
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Liu Z, Hartman S, van Veen H, Zhang H, Leeggangers HACF, Martopawiro S, Bosman F, de Deugd F, Su P, Hummel M, Rankenberg T, Hassall KL, Bailey-Serres J, Theodoulou FL, Voesenek LACJ, Sasidharan R. Ethylene augments root hypoxia tolerance via growth cessation and reactive oxygen species amelioration. PLANT PHYSIOLOGY 2022; 190:1365-1383. [PMID: 35640551 PMCID: PMC9516759 DOI: 10.1093/plphys/kiac245] [Citation(s) in RCA: 19] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2022] [Accepted: 04/29/2022] [Indexed: 05/20/2023]
Abstract
Flooded plants experience impaired gas diffusion underwater, leading to oxygen deprivation (hypoxia). The volatile plant hormone ethylene is rapidly trapped in submerged plant cells and is instrumental for enhanced hypoxia acclimation. However, the precise mechanisms underpinning ethylene-enhanced hypoxia survival remain unclear. We studied the effect of ethylene pretreatment on hypoxia survival of Arabidopsis (Arabidopsis thaliana) primary root tips. Both hypoxia itself and re-oxygenation following hypoxia are highly damaging to root tip cells, and ethylene pretreatments reduced this damage. Ethylene pretreatment alone altered the abundance of transcripts and proteins involved in hypoxia responses, root growth, translation, and reactive oxygen species (ROS) homeostasis. Through imaging and manipulating ROS abundance in planta, we demonstrated that ethylene limited excessive ROS formation during hypoxia and subsequent re-oxygenation and improved oxidative stress survival in a PHYTOGLOBIN1-dependent manner. In addition, we showed that root growth cessation via ethylene and auxin occurred rapidly and that this quiescence behavior contributed to enhanced hypoxia tolerance. Collectively, our results show that the early flooding signal ethylene modulates a variety of processes that all contribute to hypoxia survival.
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Affiliation(s)
| | | | | | - Hongtao Zhang
- Plant Sciences and the Bioeconomy, Rothamsted Research, Harpenden AL5 2JQ, UK
| | - Hendrika A C F Leeggangers
- Plant-Environment Signaling, Institute of Environmental Biology, Utrecht University, Utrecht, 3584 CH, The Netherlands
| | - Shanice Martopawiro
- Plant-Environment Signaling, Institute of Environmental Biology, Utrecht University, Utrecht, 3584 CH, The Netherlands
| | - Femke Bosman
- Plant-Environment Signaling, Institute of Environmental Biology, Utrecht University, Utrecht, 3584 CH, The Netherlands
| | - Florian de Deugd
- Plant-Environment Signaling, Institute of Environmental Biology, Utrecht University, Utrecht, 3584 CH, The Netherlands
| | - Peng Su
- Plant-Environment Signaling, Institute of Environmental Biology, Utrecht University, Utrecht, 3584 CH, The Netherlands
| | - Maureen Hummel
- Department of Botany and Plant Sciences, Center for Plant Cell Biology, University of California, Riverside, California 92521, USA
| | - Tom Rankenberg
- Plant-Environment Signaling, Institute of Environmental Biology, Utrecht University, Utrecht, 3584 CH, The Netherlands
| | - Kirsty L Hassall
- Intelligent Data Ecosystems, Rothamsted Research, Harpenden AL5 2JQ, UK
| | - Julia Bailey-Serres
- Plant-Environment Signaling, Institute of Environmental Biology, Utrecht University, Utrecht, 3584 CH, The Netherlands
- Department of Botany and Plant Sciences, Center for Plant Cell Biology, University of California, Riverside, California 92521, USA
| | | | - Laurentius A C J Voesenek
- Plant-Environment Signaling, Institute of Environmental Biology, Utrecht University, Utrecht, 3584 CH, The Netherlands
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14
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Morales A, de Boer HJ, Douma JC, Elsen S, Engels S, Glimmerveen T, Sajeev N, Huber M, Luimes M, Luitjens E, Raatjes K, Hsieh C, Teapal J, Wildenbeest T, Jiang Z, Pareek A, Singla-Pareek S, Yin X, Evers J, Anten NPR, van Zanten M, Sasidharan R. Effects of sublethal single, simultaneous and sequential abiotic stresses on phenotypic traits of Arabidopsis thaliana. AOB PLANTS 2022; 14:plac029. [PMID: 35854681 PMCID: PMC9291396 DOI: 10.1093/aobpla/plac029] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2021] [Accepted: 06/21/2022] [Indexed: 05/24/2023]
Abstract
Plant responses to abiotic stresses are complex and dynamic, and involve changes in different traits, either as the direct consequence of the stress, or as an active acclimatory response. Abiotic stresses frequently occur simultaneously or in succession, rather than in isolation. Despite this, most studies have focused on a single stress and single or few plant traits. To address this gap, our study comprehensively and categorically quantified the individual and combined effects of three major abiotic stresses associated with climate change (flooding, progressive drought and high temperature) on 12 phenotypic traits related to morphology, development, growth and fitness, at different developmental stages in four Arabidopsis thaliana accessions. Combined sublethal stresses were applied either simultaneously (high temperature and drought) or sequentially (flooding followed by drought). In total, we analysed the phenotypic responses of 1782 individuals across these stresses and different developmental stages. Overall, abiotic stresses and their combinations resulted in distinct patterns of effects across the traits analysed, with both quantitative and qualitative differences across accessions. Stress combinations had additive effects on some traits, whereas clear positive and negative interactions were observed for other traits: 9 out of 12 traits for high temperature and drought, 6 out of 12 traits for post-submergence and drought showed significant interactions. In many cases where the stresses interacted, the strength of interactions varied across accessions. Hence, our results indicated a general pattern of response in most phenotypic traits to the different stresses and stress combinations, but it also indicated a natural genetic variation in the strength of these responses. This includes novel results regarding the lack of a response to drought after submergence and a decoupling between leaf number and flowering time after submergence. Overall, our study provides a rich characterization of trait responses of Arabidopsis plants to sublethal abiotic stresses at the phenotypic level and can serve as starting point for further in-depth physiological research and plant modelling efforts.
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Affiliation(s)
| | - Hugo J de Boer
- Copernicus Institute of Sustainable Development, Utrecht University, 3584CB Utrecht, The Netherlands
| | - Jacob C Douma
- Centre for Crop Systems Analysis, Wageningen University & Research, 6700AK Wageningen, The Netherlands
| | - Saskia Elsen
- Molecular Plant Physiology, Institute of Environmental Biology, Utrecht University, 3584CH Utrecht, The Netherlands
| | - Sophie Engels
- Molecular Plant Physiology, Institute of Environmental Biology, Utrecht University, 3584CH Utrecht, The Netherlands
| | - Tobias Glimmerveen
- Molecular Plant Physiology, Institute of Environmental Biology, Utrecht University, 3584CH Utrecht, The Netherlands
| | - Nikita Sajeev
- Molecular Plant Physiology, Institute of Environmental Biology, Utrecht University, 3584CH Utrecht, The Netherlands
- Plant Ecophysiology, Institute of Environmental Biology, Utrecht University, 3584CH Utrecht, The Netherlands
| | - Martina Huber
- Plant Ecophysiology, Institute of Environmental Biology, Utrecht University, 3584CH Utrecht, The Netherlands
| | - Mathijs Luimes
- Molecular Plant Physiology, Institute of Environmental Biology, Utrecht University, 3584CH Utrecht, The Netherlands
| | - Emma Luitjens
- Molecular Plant Physiology, Institute of Environmental Biology, Utrecht University, 3584CH Utrecht, The Netherlands
| | - Kevin Raatjes
- Plant Ecophysiology, Institute of Environmental Biology, Utrecht University, 3584CH Utrecht, The Netherlands
| | - Chenyun Hsieh
- Molecular Plant Physiology, Institute of Environmental Biology, Utrecht University, 3584CH Utrecht, The Netherlands
| | - Juliane Teapal
- Developmental Biology, Institute of Biodynamics and Biocomplexity, Utrecht University, 3584CH Utrecht, The Netherlands
| | - Tessa Wildenbeest
- Molecular Plant Physiology, Institute of Environmental Biology, Utrecht University, 3584CH Utrecht, The Netherlands
| | - Zhang Jiang
- Molecular Plant Physiology, Institute of Environmental Biology, Utrecht University, 3584CH Utrecht, The Netherlands
- Plant Ecophysiology, Institute of Environmental Biology, Utrecht University, 3584CH Utrecht, The Netherlands
| | - Ashwani Pareek
- Stress Physiology and Molecular Biology Laboratory, Jawaharlal Nehru University, New Delhi 110067, India
| | - Sneh Singla-Pareek
- Plant Stress Biology, International Centre for Genetic Engineering and Biotechnology, New Delhi 110067, India
| | - Xinyou Yin
- Centre for Crop Systems Analysis, Wageningen University & Research, 6700AK Wageningen, The Netherlands
| | - Jochem Evers
- Centre for Crop Systems Analysis, Wageningen University & Research, 6700AK Wageningen, The Netherlands
| | - Niels P R Anten
- Centre for Crop Systems Analysis, Wageningen University & Research, 6700AK Wageningen, The Netherlands
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15
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Gibbs DJ, Osborne R. High on oxygen. NATURE PLANTS 2022; 8:731-732. [PMID: 35773418 DOI: 10.1038/s41477-022-01196-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Affiliation(s)
- Daniel J Gibbs
- School of Biosciences, University of Birmingham, Edgbaston, UK.
| | - Rory Osborne
- School of Biosciences, University of Birmingham, Edgbaston, UK
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16
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Cho HY, Chou MY, Ho HY, Chen WC, Shih MC. Ethylene modulates translation dynamics in Arabidopsis under submergence via GCN2 and EIN2. SCIENCE ADVANCES 2022; 8:eabm7863. [PMID: 35658031 PMCID: PMC9166634 DOI: 10.1126/sciadv.abm7863] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/14/2021] [Accepted: 04/15/2022] [Indexed: 05/23/2023]
Abstract
General translational repression is a key process that reduces energy consumption under hypoxia. Here, we show that plant stress-activated general control nonderepressible 2 (GCN2) was activated to regulate the reduction in polysome loading during submergence in Arabidopsis. GCN2 signaling was activated by ethylene under submergence. GCN2 activity was reduced in etr1-1, but not in ein2-5 or eil1ein3, under submergence, suggesting that GCN2 activity is regulated by a noncanonical ethylene signaling pathway. Polysome loading was not reduced in ein2-5 under submergence, implying that ethylene modulates translation via both EIN2 and GCN2. Transcriptomic analysis demonstrated that EIN2 and GCN2 regulate not only general translational repression but also translational enhancement of specific mRNAs under submergence. Together, these results demonstrate that during submergence, entrapped ethylene triggers GCN2 and EIN2 to regulate translation dynamics and ensure the translation of stress response proteins.
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17
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Abbas M, Sharma G, Dambire C, Marquez J, Alonso-Blanco C, Proaño K, Holdsworth MJ. An oxygen-sensing mechanism for angiosperm adaptation to altitude. Nature 2022; 606:565-569. [PMID: 35650430 PMCID: PMC9200633 DOI: 10.1038/s41586-022-04740-y] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2021] [Accepted: 04/07/2022] [Indexed: 11/10/2022]
Abstract
Flowering plants (angiosperms) can grow at extreme altitudes, and have been observed growing as high as 6,400 metres above sea level1,2; however, the molecular mechanisms that enable plant adaptation specifically to altitude are unknown. One distinguishing feature of increasing altitude is a reduction in the partial pressure of oxygen (pO2). Here we investigated the relationship between altitude and oxygen sensing in relation to chlorophyll biosynthesis—which requires molecular oxygen3—and hypoxia-related gene expression. We show that in etiolated seedlings of angiosperm species, steady-state levels of the phototoxic chlorophyll precursor protochlorophyllide are influenced by sensing of atmospheric oxygen concentration. In Arabidopsis thaliana, this is mediated by the PLANT CYSTEINE OXIDASE (PCO) N-degron pathway substrates GROUP VII ETHYLENE RESPONSE FACTOR transcription factors (ERFVIIs). ERFVIIs positively regulate expression of FLUORESCENT IN BLUE LIGHT (FLU), which represses the first committed step of chlorophyll biosynthesis, forming an inactivation complex with tetrapyrrole synthesis enzymes that are negatively regulated by ERFVIIs, thereby suppressing protochlorophyllide. In natural populations representing diverse angiosperm clades, we find oxygen-dependent altitudinal clines for steady-state levels of protochlorophyllide, expression of inactivation complex components and hypoxia-related genes. Finally, A. thaliana accessions from contrasting altitudes display altitude-dependent ERFVII activity and accumulation. We thus identify a mechanism for genetic adaptation to absolute altitude through alteration of the sensitivity of the oxygen-sensing system. Plants have adapted to grow at specific altitudes by regulating chlorophyll synthesis in response to ambient oxygen concentration, calibrated by altitude-dependent activity of GROUP VII ETHYLENE RESPONSE FACTOR.
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Affiliation(s)
- Mohamad Abbas
- School of Biosciences, University of Nottingham, Nottingham, UK
| | - Gunjan Sharma
- School of Biosciences, University of Nottingham, Nottingham, UK
| | | | | | - Carlos Alonso-Blanco
- Centro Nacional de Biotecnología, Consejo Superior de Investigaciones Científicas, Madrid, Spain
| | - Karina Proaño
- Laboratorio de Biotecnología Vegetal, Departamento de Ciencias de la Vida y la Agricultura, Universidad de las Fuerzas Armadas ESPE, Sangolquí, Ecuador
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18
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Lou S, Guo X, Liu L, Song Y, Zhang L, Jiang Y, Zhang L, Sun P, Liu B, Tong S, Chen N, Liu M, Zhang H, Liang R, Feng X, Zheng Y, Liu H, Holdsworth MJ, Liu J. Allelic shift in cis-elements of the transcription factor RAP2.12 underlies adaptation associated with humidity in Arabidopsis thaliana. SCIENCE ADVANCES 2022; 8:eabn8281. [PMID: 35507656 PMCID: PMC9067915 DOI: 10.1126/sciadv.abn8281] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
Populations of widespread species are usually geographically distributed through contrasting stresses, but underlying genetic mechanisms controlling this adaptation remain largely unknown. Here, we show that in Arabidopsis thaliana, allelic changes in the cis-regulatory elements, WT box and W box, in the promoter of a key transcription factor associated with oxygen sensing, RELATED TO AP 2.12 (RAP2.12), are responsible for differentially regulating tolerance to drought and flooding. These two cis-elements are regulated by different transcription factors that downstream of RAP2.12 results in differential accumulation of hypoxia-responsive transcripts. The evolution from one cis-element haplotype to the other is associated with the colonization of humid environments from arid habitats. This gene thus promotes both drought and flooding adaptation via an adaptive mechanism that diversifies its regulation through noncoding alleles.
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Affiliation(s)
- Shangling Lou
- Key Laboratory for Bio-resources and Eco-environment & State Key Lab of Hydraulics & Mountain River Engineering, College of Life Sciences, Sichuan University, Chengdu 610065, China
| | - Xiang Guo
- Key Laboratory for Bio-resources and Eco-environment & State Key Lab of Hydraulics & Mountain River Engineering, College of Life Sciences, Sichuan University, Chengdu 610065, China
| | - Lian Liu
- Key Laboratory for Bio-resources and Eco-environment & State Key Lab of Hydraulics & Mountain River Engineering, College of Life Sciences, Sichuan University, Chengdu 610065, China
| | - Yan Song
- Key Laboratory for Bio-resources and Eco-environment & State Key Lab of Hydraulics & Mountain River Engineering, College of Life Sciences, Sichuan University, Chengdu 610065, China
| | - Lei Zhang
- Key Laboratory for Bio-resources and Eco-environment & State Key Lab of Hydraulics & Mountain River Engineering, College of Life Sciences, Sichuan University, Chengdu 610065, China
| | - Yuanzhong Jiang
- Key Laboratory for Bio-resources and Eco-environment & State Key Lab of Hydraulics & Mountain River Engineering, College of Life Sciences, Sichuan University, Chengdu 610065, China
| | - Lushui Zhang
- Key Laboratory for Bio-resources and Eco-environment & State Key Lab of Hydraulics & Mountain River Engineering, College of Life Sciences, Sichuan University, Chengdu 610065, China
| | - Pengchuan Sun
- Key Laboratory for Bio-resources and Eco-environment & State Key Lab of Hydraulics & Mountain River Engineering, College of Life Sciences, Sichuan University, Chengdu 610065, China
| | - Bao Liu
- Key Laboratory for Bio-resources and Eco-environment & State Key Lab of Hydraulics & Mountain River Engineering, College of Life Sciences, Sichuan University, Chengdu 610065, China
| | - Shaofei Tong
- Key Laboratory for Bio-resources and Eco-environment & State Key Lab of Hydraulics & Mountain River Engineering, College of Life Sciences, Sichuan University, Chengdu 610065, China
| | - Ningning Chen
- Key Laboratory for Bio-resources and Eco-environment & State Key Lab of Hydraulics & Mountain River Engineering, College of Life Sciences, Sichuan University, Chengdu 610065, China
| | - Meng Liu
- Key Laboratory for Bio-resources and Eco-environment & State Key Lab of Hydraulics & Mountain River Engineering, College of Life Sciences, Sichuan University, Chengdu 610065, China
| | - Han Zhang
- Key Laboratory for Bio-resources and Eco-environment & State Key Lab of Hydraulics & Mountain River Engineering, College of Life Sciences, Sichuan University, Chengdu 610065, China
| | - Ruyun Liang
- Key Laboratory for Bio-resources and Eco-environment & State Key Lab of Hydraulics & Mountain River Engineering, College of Life Sciences, Sichuan University, Chengdu 610065, China
| | - Xiaoqin Feng
- Key Laboratory for Bio-resources and Eco-environment & State Key Lab of Hydraulics & Mountain River Engineering, College of Life Sciences, Sichuan University, Chengdu 610065, China
| | - Yudan Zheng
- Key Laboratory for Bio-resources and Eco-environment & State Key Lab of Hydraulics & Mountain River Engineering, College of Life Sciences, Sichuan University, Chengdu 610065, China
| | - Huanhuan Liu
- Key Laboratory for Bio-resources and Eco-environment & State Key Lab of Hydraulics & Mountain River Engineering, College of Life Sciences, Sichuan University, Chengdu 610065, China
- Corresponding author. (H.L.); (M.J.H.); (J.L.)
| | - Michael J. Holdsworth
- School of Biosciences, University of Nottingham, Loughborough LE12 5RD, UK
- Corresponding author. (H.L.); (M.J.H.); (J.L.)
| | - Jianquan Liu
- Key Laboratory for Bio-resources and Eco-environment & State Key Lab of Hydraulics & Mountain River Engineering, College of Life Sciences, Sichuan University, Chengdu 610065, China
- Corresponding author. (H.L.); (M.J.H.); (J.L.)
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19
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Meng X, Li L, Pascual J, Rahikainen M, Yi C, Jost R, He C, Fournier-Level A, Borevitz J, Kangasjärvi S, Whelan J, Berkowitz O. GWAS on multiple traits identifies mitochondrial ACONITASE3 as important for acclimation to submergence stress. PLANT PHYSIOLOGY 2022; 188:2039-2058. [PMID: 35043967 PMCID: PMC8968326 DOI: 10.1093/plphys/kiac011] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2021] [Accepted: 12/03/2021] [Indexed: 05/26/2023]
Abstract
Flooding causes severe crop losses in many parts of the world. Genetic variation in flooding tolerance exists in many species; however, there are few examples for the identification of tolerance genes and their underlying function. We conducted a genome-wide association study (GWAS) in 387 Arabidopsis (Arabidopsis thaliana) accessions. Plants were subjected to prolonged submergence followed by desubmergence, and seven traits (score, water content, Fv/Fm, and concentrations of nitrate, chlorophyll, protein, and starch) were quantified to characterize their acclimation responses. These traits showed substantial variation across the range of accessions. A total of 35 highly significant single-nucleotide polymorphisms (SNPs) were identified across the 20 GWA datasets, pointing to 22 candidate genes, with functions in TCA cycle, DNA modification, and cell division. Detailed functional characterization of one candidate gene, ACONITASE3 (ACO3), was performed. Chromatin immunoprecipitation followed by sequencing showed that a single nucleotide polymorphism in the ACO3 promoter co-located with the binding site of the master regulator of retrograde signaling ANAC017, while subcellular localization of an ACO3-YFP fusion protein confirmed a mitochondrial localization during submergence. Analysis of mutant and overexpression lines determined changes in trait parameters that correlated with altered submergence tolerance and were consistent with the GWAS results. Subsequent RNA-seq experiments suggested that impairing ACO3 function increases the sensitivity to submergence by altering ethylene signaling, whereas ACO3 overexpression leads to tolerance by metabolic priming. These results indicate that ACO3 impacts submergence tolerance through integration of carbon and nitrogen metabolism via the mitochondrial TCA cycle and impacts stress signaling during acclimation to stress.
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Affiliation(s)
- Xiangxiang Meng
- Key Laboratory of Biofuels, Shandong Provincial Key Laboratory of Energy Genetics, Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, China
- Department of Animal, Plant and Soil Science, ARC Centre of Excellence in Plant Energy Biology, La Trobe University, Bundoora, Victoria 3086, Australia
| | | | | | - Moona Rahikainen
- Molecular Plant Biology, Department of Biochemistry, University of Turku, Turku, FI-20014, Finland
| | - Changyu Yi
- Department of Animal, Plant and Soil Science, ARC Centre of Excellence in Plant Energy Biology, La Trobe University, Bundoora, Victoria 3086, Australia
| | - Ricarda Jost
- Department of Animal, Plant and Soil Science, ARC Centre of Excellence in Plant Energy Biology, La Trobe University, Bundoora, Victoria 3086, Australia
| | - Cunman He
- Department of Animal, Plant and Soil Science, ARC Centre of Excellence in Plant Energy Biology, La Trobe University, Bundoora, Victoria 3086, Australia
| | | | - Justin Borevitz
- Research School of Biology and Centre for Biodiversity Analysis, ARC Centre of Excellence in Plant Energy Biology, Australian National University, Canberra, ACT 0200, Australia
| | - Saijaliisa Kangasjärvi
- Organismal and Evolutionary Biology Research Programme, Faculty of Biological and Environmental Sciences, Helsinki University, FI-00014, Finland
- Department of Agricultural Sciences, Faculty of Agriculture and Forestry, University of Helsinki, Helsinki, FI-00014, Finland
- Viikki Plant Science Center, University of Helsinki, Helsinki, FI-00014, Finland
| | - James Whelan
- Department of Animal, Plant and Soil Science, ARC Centre of Excellence in Plant Energy Biology, La Trobe University, Bundoora, Victoria 3086, Australia
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20
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Deng X, Yang D, Sun H, Liu J, Song H, Xiong Y, Wang Y, Ma J, Zhang M, Li J, Liu Y, Yang M. Time-course analysis and transcriptomic identification of key response strategies to complete submergence in Nelumbo nucifera. HORTICULTURE RESEARCH 2022; 9:uhac001. [PMID: 35147174 PMCID: PMC8973275 DOI: 10.1093/hr/uhac001] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2020] [Accepted: 12/12/2021] [Indexed: 05/12/2023]
Abstract
Water submergence is an environmental stress with detrimental effects on plant growth and survival. As a wetland plant species, lotus (Nelumbo nucifera) is widely cultivated in flood-prone lowlands throughout Asian countries, but little is known about its endurance and acclimation mechanisms to complete submergence. Here, we combined a time-course submergence experiment and an RNA-sequencing transcriptome analysis on two lotus varieties of "Qiuxing" and "China Antique". Both varieties showed a low submergence tolerance, with a median lethal time of around 10 days. Differentially expressed gene (DEG) analysis and weighted gene co-expression network analysis (WGCNA) identified a number of key genes putatively involved in lotus submergence responses. Lotus plants under complete submergence developed thinned leaves and elongated petioles containing high density of aerenchyma. All four lotus submergence responsive ERF-VII genes and gene sets corresponding to the low oxygen "escape" strategy (LOES) were elevated. In addition, a number of lotus innate immunity genes were rapidly induced by submergence, likely to confer resistance to possible pathogen infections. Our data also reveals the likely involvement of jasmonic acid in modulating lotus submergence responses, but to a lesser extent than the gaseous ethylene hormone. These results suggest that lotus plants primarily take the LOES strategy in coping with submergence-induced complex stresses, and will be valuable for people understanding the molecular basis underlying the plant submergence acclimations.
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Affiliation(s)
- Xianbao Deng
- Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, China
- Center of Economic Botany, Core Botanical Gardens, Chinese Academy of Sciences, Wuhan 430074, China
| | - Dong Yang
- Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, China
- Center of Economic Botany, Core Botanical Gardens, Chinese Academy of Sciences, Wuhan 430074, China
| | - Heng Sun
- Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, China
| | - Juan Liu
- Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, China
| | - Heyun Song
- Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, China
- University of Chinese Academy of Sciences, 19A Yuquanlu, Beijing, 100049, China
| | - Yaqian Xiong
- Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, China
- University of Chinese Academy of Sciences, 19A Yuquanlu, Beijing, 100049, China
| | - Yunmeng Wang
- Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, China
- University of Chinese Academy of Sciences, 19A Yuquanlu, Beijing, 100049, China
| | - Junyu Ma
- Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, China
- University of Chinese Academy of Sciences, 19A Yuquanlu, Beijing, 100049, China
| | - Minghua Zhang
- Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, China
- University of Chinese Academy of Sciences, 19A Yuquanlu, Beijing, 100049, China
| | - Jing Li
- School of Chemistry, Chemical Engineering and Life Sciences, Wuhan University of Technology, Wuhan 430070, China
| | - Yanling Liu
- Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, China
- Center of Economic Botany, Core Botanical Gardens, Chinese Academy of Sciences, Wuhan 430074, China
| | - Mei Yang
- Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, China
- Center of Economic Botany, Core Botanical Gardens, Chinese Academy of Sciences, Wuhan 430074, China
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21
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Wittig PR, Ambros S, Müller JT, Bammer B, Álvarez-Cansino L, Konnerup D, Pedersen O, Mustroph A. Two Brassica napus cultivars differ in gene expression, but not in their response to submergence. PHYSIOLOGIA PLANTARUM 2021; 171:400-415. [PMID: 33099772 DOI: 10.1111/ppl.13251] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2020] [Accepted: 10/11/2020] [Indexed: 06/11/2023]
Abstract
Heavy rainfall causes flooding of natural ecosystems as well as farmland, negatively affecting plant performance. While the responses of the wild model organism Arabidopsis thaliana to such stress conditions is well understood, little is known about the responses of its relative, the important oil crop plant Brassica napus. For the first time, we analyzed the molecular response of Brassica napus seedlings to full submergence in a natural light-dark cycle. We used two cultivars in this study, a European hybrid cultivar and an Asian flood-tolerant cultivar. Despite their genomic differences, those genotypes showed no major differences in their responses to submergence. The molecular responses to submergence included the induction of defense- and hormone-related pathways and the repression of biosynthetic processes. Furthermore, RNAseq revealed a strong carbohydrate-starvation response under submergence in daylight, which corresponded with a fast depletion of sugars. Consequently, both B. napus cultivars exhibited a strong growth repression under water, but there was no indication of a low-oxygen response. The ability of the European hybrid cultivar to form a short-lived leaf gas film neither increased underwater net photosynthesis, underwater dark respiration nor growth during submergence. Due to the high sensitivity of both cultivars, the analysis of other cultivars or related species with higher submergence tolerance is required in order to improve flood tolerance of this crop species. One major target could be the improvement of underwater photosynthesis efficiency in order to enhance submergence survival.
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Affiliation(s)
- Philipp R Wittig
- Department of Plant Physiology, University Bayreuth, Bayreuth, Germany
| | - Stefanie Ambros
- Department of Plant Physiology, University Bayreuth, Bayreuth, Germany
| | - Jana T Müller
- Department of Plant Physiology, University Bayreuth, Bayreuth, Germany
| | - Bettina Bammer
- Department of Plant Physiology, University Bayreuth, Bayreuth, Germany
| | | | - Dennis Konnerup
- Department of Food Science, Aarhus University, Aarhus N, Denmark
| | - Ole Pedersen
- Department of Biology, University of Copenhagen, Copenhagen, Denmark
| | - Angelika Mustroph
- Department of Plant Physiology, University Bayreuth, Bayreuth, Germany
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22
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Müller JT, van Veen H, Bartylla MM, Akman M, Pedersen O, Sun P, Schuurink RC, Takeuchi J, Todoroki Y, Weig AR, Sasidharan R, Mustroph A. Keeping the shoot above water - submergence triggers antithetical growth responses in stems and petioles of watercress (Nasturtium officinale). THE NEW PHYTOLOGIST 2021; 229:140-155. [PMID: 31792981 DOI: 10.1111/nph.16350] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2019] [Accepted: 11/26/2019] [Indexed: 05/25/2023]
Abstract
The molecular mechanisms controlling underwater elongation are based extensively on studies on internode elongation in the monocot rice (Oryza sativa) and petiole elongation in Rumex rosette species. Here, we characterize underwater growth in the dicot Nasturtium officinale (watercress), a wild species of the Brassicaceae family, in which submergence enhances stem elongation and suppresses petiole growth. We used a genome-wide transcriptome analysis to identify the molecular mechanisms underlying the observed antithetical growth responses. Though submergence caused a substantial reconfiguration of the petiole and stem transcriptome, only little qualitative differences were observed between both tissues. A core submergence response included hormonal regulation and metabolic readjustment for energy conservation, whereas tissue-specific responses were associated with defense, photosynthesis, and cell wall polysaccharides. Transcriptomic and physiological characterization suggested that the established ethylene, abscisic acid (ABA), and GA growth regulatory module for underwater elongation could not fully explain underwater growth in watercress. Petiole growth suppression is likely attributed to a cell cycle arrest. Underwater stem elongation is driven by an early decline in ABA and is not primarily mediated by ethylene or GA. An enhanced stem elongation observed in the night period was not linked to hypoxia and suggests an involvement of circadian regulation.
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Affiliation(s)
- Jana T Müller
- Plant Physiology, University Bayreuth, Universitaetsstraße 30, 95440, Bayreuth, Germany
| | - Hans van Veen
- Plant Ecophysiology, Institute of Environmental Biology, Utrecht University, Padualaan 8, 3584 CH, Utrecht, the Netherlands
| | - Malte M Bartylla
- Plant Physiology, University Bayreuth, Universitaetsstraße 30, 95440, Bayreuth, Germany
| | - Melis Akman
- Plant and Microbial Biology, University of California, Berkeley, 361 Koshland Hall, Berkeley, CA, 94720, USA
- Plant Sciences, University of California, Davis, One Shields Avenue, Davis, CA, 95616, USA
| | - Ole Pedersen
- Department of Biology, University of Copenhagen, Universitetsparken 4, 2100, Copenhagen, Denmark
| | - Pulu Sun
- Green Life Sciences Research Cluster, Swammerdam Institute for Life Sciences, University of Amsterdam, 1098 XH, Amsterdam, the Netherlands
| | - Robert C Schuurink
- Green Life Sciences Research Cluster, Swammerdam Institute for Life Sciences, University of Amsterdam, 1098 XH, Amsterdam, the Netherlands
| | - Jun Takeuchi
- Faculty of Agriculture, Shizuoka University, Shizuoka, 422-8529, Japan
| | - Yasushi Todoroki
- Faculty of Agriculture, Shizuoka University, Shizuoka, 422-8529, Japan
| | - Alfons R Weig
- Genomics & Bioinformatics, University Bayreuth, Universitaetsstraße 30, 95440, Bayreuth, Germany
| | - Rashmi Sasidharan
- Plant Ecophysiology, Institute of Environmental Biology, Utrecht University, Padualaan 8, 3584 CH, Utrecht, the Netherlands
| | - Angelika Mustroph
- Plant Physiology, University Bayreuth, Universitaetsstraße 30, 95440, Bayreuth, Germany
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23
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Lee HJ, Park JS, Shin SY, Kim SG, Lee G, Kim HS, Jeon JH, Cho HS. Submergence deactivates wound-induced plant defence against herbivores. Commun Biol 2020; 3:651. [PMID: 33159149 PMCID: PMC7648080 DOI: 10.1038/s42003-020-01376-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2020] [Accepted: 10/13/2020] [Indexed: 01/01/2023] Open
Abstract
Flooding is a common and critical disaster in agriculture, because it causes defects in plant growth and even crop loss. An increase in herbivore populations is often observed after floods, which leads to additional damage to the plants. Although molecular mechanisms underlying the plant responses to flooding have been identified, how plant defence systems are affected by flooding remains poorly understood. Herein, we show that submergence deactivates wound-induced defence against herbivore attack in Arabidopsis thaliana. Submergence rapidly suppressed the wound-induced expression of jasmonic acid (JA) biosynthesis genes, resulting in reduced JA accumulation. While plants exposed to hypoxia in argon gas exhibited similar reduced wound responses, the inhibitory effects were initiated after short-term submergence without signs for lack of oxygen. Instead, expression of ethylene-responsive genes was increased after short-term submergence. Blocking ethylene signalling by ein2-1 mutation partially restored suppressed expression of several wound-responsive genes by submergence. In addition, submergence rapidly removed active markers of histone modifications at a gene locus involved in JA biosynthesis. Our findings suggest that submergence inactivates defence systems of plants, which would explain the proliferation of herbivores after flooding. Hyo-Jun Lee et al. show that submergence in Arabidopsis deactivates wound-induced defence against herbivore attack by suppressing the expression of jasmonic acid biosynthesis genes and increasing expression of ethylene-responsive genes. These results shed light on how flooding may impact plant defence systems.
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Affiliation(s)
- Hyo-Jun Lee
- Plant Systems Engineering Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon, 34141, Korea. .,Department of Functional Genomics, KRIBB School of Bioscience, University of Science and Technology, Daejeon, 34113, Korea.
| | - Ji-Sun Park
- Plant Systems Engineering Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon, 34141, Korea
| | - Seung Yong Shin
- Plant Systems Engineering Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon, 34141, Korea
| | - Sang-Gyu Kim
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology, Daejeon, 34141, Korea
| | - Gisuk Lee
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology, Daejeon, 34141, Korea
| | - Hyun-Soon Kim
- Plant Systems Engineering Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon, 34141, Korea.,Department of Biosystems and Bioengineering, KRIBB School of Biotechnology, University of Science and Technology, Daejeon, 34113, Korea
| | - Jae Heung Jeon
- Plant Systems Engineering Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon, 34141, Korea
| | - Hye Sun Cho
- Plant Systems Engineering Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon, 34141, Korea.,Department of Biosystems and Bioengineering, KRIBB School of Biotechnology, University of Science and Technology, Daejeon, 34113, Korea
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24
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The Anaerobic Product Ethanol Promotes Autophagy-Dependent Submergence Tolerance in Arabidopsis. Int J Mol Sci 2020; 21:ijms21197361. [PMID: 33028029 PMCID: PMC7583018 DOI: 10.3390/ijms21197361] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2020] [Revised: 09/29/2020] [Accepted: 10/02/2020] [Indexed: 02/07/2023] Open
Abstract
In response to hypoxia under submergence, plants switch from aerobic respiration to anaerobic fermentation, which leads to the accumulation of the end product, ethanol. We previously reported that Arabidopsis thaliana autophagy-deficient mutants show increased sensitivity to ethanol treatment, indicating that ethanol is likely involved in regulating the autophagy-mediated hypoxia response. Here, using a transcriptomic analysis, we identified 3909 genes in Arabidopsis seedlings that were differentially expressed in response to ethanol treatment, including 2487 upregulated and 1422 downregulated genes. Ethanol treatment significantly upregulated genes involved in autophagy and the detoxification of reactive oxygen species. Using transgenic lines expressing AUTOPHAGY-RELATED PROTEIN 8e fused to green fluorescent protein (GFP-ATG8e), we confirmed that exogenous ethanol treatment promotes autophagosome formation in vivo. Phenotypic analysis showed that deletions in the alcohol dehydrogenase gene in adh1 mutants result in attenuated submergence tolerance, decreased accumulation of ATG proteins, and diminished submergence-induced autophagosome formation. Compared to the submergence-tolerant Arabidopsis accession Columbia (Col-0), the submergence-intolerant accession Landsberg erecta (Ler) displayed hypersensitivity to ethanol treatment; we linked these phenotypes to differences in the functions of ADH1 and the autophagy machinery between these accessions. Thus, ethanol promotes autophagy-mediated submergence tolerance in Arabidopsis.
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25
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Haas FB, Fernandez-Pozo N, Meyberg R, Perroud PF, Göttig M, Stingl N, Saint-Marcoux D, Langdale JA, Rensing SA. Single Nucleotide Polymorphism Charting of P. patens Reveals Accumulation of Somatic Mutations During in vitro Culture on the Scale of Natural Variation by Selfing. FRONTIERS IN PLANT SCIENCE 2020; 11:813. [PMID: 32733496 PMCID: PMC7358436 DOI: 10.3389/fpls.2020.00813] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/19/2020] [Accepted: 05/20/2020] [Indexed: 06/01/2023]
Abstract
Introduction: Physcomitrium patens (Hedw.) Mitten (previously known as Physcomitrella patens) was collected by H.L.K. Whitehouse in Gransden Wood (Huntingdonshire, United Kingdom) in 1962 and distributed across the globe starting in 1974. Hence, the Gransden accession has been cultured in vitro in laboratories for half a century. Today, there are more than 13 different pedigrees derived from the original accession. Additionally, accessions from other sites worldwide were collected during the last decades. Methods and Results: In this study, 250 high throughput RNA sequencing (RNA-seq) samples and 25 gDNA samples were used to detect single nucleotide polymorphisms (SNPs). Analyses were performed using five different P. patens accessions and 13 different Gransden pedigrees. SNPs were overlaid with metadata and known phenotypic variations. Unique SNPs defining Gransden pedigrees and accessions were identified and experimentally confirmed. They can be successfully employed for PCR-based identification. Conclusion: We show independent mutations in different Gransden laboratory pedigrees, demonstrating that somatic mutations occur and accumulate during in vitro culture. The frequency of such mutations is similar to those observed in naturally occurring populations. We present evidence that vegetative propagation leads to accumulation of deleterious mutations, and that sexual reproduction purges those. Unique SNP sets for five different P. patens accessions were isolated and can be used to determine individual accessions as well as Gransden pedigrees. Based on that, laboratory methods to easily determine P. patens accessions and Gransden pedigrees are presented.
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Affiliation(s)
- Fabian B. Haas
- Plant Cell Biology, Department of Biology, University of Marburg, Marburg, Germany
| | - Noe Fernandez-Pozo
- Plant Cell Biology, Department of Biology, University of Marburg, Marburg, Germany
| | - Rabea Meyberg
- Plant Cell Biology, Department of Biology, University of Marburg, Marburg, Germany
| | | | - Marco Göttig
- Plant Cell Biology, Department of Biology, University of Marburg, Marburg, Germany
| | - Nora Stingl
- Plant Cell Biology, Department of Biology, University of Marburg, Marburg, Germany
| | - Denis Saint-Marcoux
- Department of Plant Sciences, University of Oxford, Oxford, United Kingdom
- Université de Lyon, UJM-Saint-Etienne, CNRS, Laboratoire BVpam - FRE 3727, Saint-Étienne, France
| | - Jane A. Langdale
- Department of Plant Sciences, University of Oxford, Oxford, United Kingdom
| | - Stefan A. Rensing
- Plant Cell Biology, Department of Biology, University of Marburg, Marburg, Germany
- BIOSS Centre for Biological Signalling Studies, University of Freiburg, Freiburg, Germany
- SYNMIKRO Center for Synthetic Microbiology, University of Marburg, Marburg, Germany
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26
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Iturralde Elortegui MDRM, Berone GD, Striker GG, Martinefsky MJ, Monterubbianesi MG, Assuero SG. Anatomical, morphological and growth responses of Thinopyrum ponticum plants subjected to partial and complete submergence during early stages of development. FUNCTIONAL PLANT BIOLOGY : FPB 2020; 47:757-768. [PMID: 32464086 DOI: 10.1071/fp19170] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2019] [Accepted: 03/25/2020] [Indexed: 06/11/2023]
Abstract
Seedling recruitment and growth of forage grasses in flood-prone grasslands is often impaired by submergence. We evaluate the responses of Thinopyrum ponticum (Podp.) Barkw. & Dewey to partial and complete submergence at two early stages of development. Two greenhouse experiments were carried out with plants at three expanded leaves (Experiment 1) or five expanded leaves stage (Experiment 2). In each case, three treatments were applied for 14 days: control (C), partial submergence (PS; water level to half plant height), and complete submergence (CS; water level to 1.5 times plant height). Submergence was followed by a recovery period of 14 days at well drained conditions. Assessments included plant survival, height, leaf blade and pseudostem length, soluble carbohydrates in pseudostem, and shoot and root dry mass accumulation at the beginning and end of the submergence, and at the end of the recovery period. Root aerenchyma formation was determined on day 14 in both experiments. Under PS all plants survived, and the impact of the stress was related to the plants' developmental stage. However, plants with five expanded leaves increased total plant biomass with respect to control by 48%, plants with three expanded leaves reduced it by the same percentage. This response could be related to a higher ability to form root aerenchyma (17 vs 10%), and an enhanced leaf de-submergence capacity due to promoted leaf blade and pseudostem lengthening. Complete submergence treatment compromised the survival of 70% of the individuals with three expanded leaves but did not affect the survival at the five expanded leaves stage. In any developmental stage (three or five expanded leaves) plants fail to promote enough elongation of leaf blades or pseudostems to emerge from the water, so that always remained below the water surface. Root aerenchyma was not increased by CS at either of these two plant developmental stages. The high amount and concentration of pseudostem total soluble carbohydrates of the larger (five expanded leaves) plants facilitated their recovery growth after submergence. Our results predict the successful introduction of this species in areas where water excesses can cause soil waterlogging or shallow-partial plant submergence, but suggest avoidance of areas prone to suffer high-intensity flooding that lead to full plant submergence as this would highly constrain plant recruitment.
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Affiliation(s)
| | - Germán D Berone
- Instituto Nacional de Tecnología Agropecuaria (INTA), EEA Balcarce, Ruta Nacional 226 km 73.5, C.C. 276, B7620BKL Balcarce, Buenos Aires, Argentina; and Facultad de Ciencias Agrarias, Universidad Nacional de Mar del Plata, Ruta Nacional 226 km 73.5, C.C. 276, B7620BKL Balcarce, Buenos Aires, Argentina
| | - Gustavo G Striker
- IFEVA, Universidad de Buenos Aires, CONICET, Facultad de Agronomía, Buenos Aires, Argentina, Av. San Martín 4453, CPA 1417, DSE Buenos Aires, Argentina; and UWA School of Agriculture and Environment, Faculty of Science, The University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia
| | - María J Martinefsky
- Instituto Nacional de Tecnología Agropecuaria (INTA), AER Olavarría, Alsina 2642, B7400COJ Olavarría, Buenos Aires, Argentina
| | - María G Monterubbianesi
- Facultad de Ciencias Agrarias, Universidad Nacional de Mar del Plata, Ruta Nacional 226 km 73.5, C.C. 276, B7620BKL Balcarce, Buenos Aires, Argentina
| | - Silvia G Assuero
- Facultad de Ciencias Agrarias, Universidad Nacional de Mar del Plata, Ruta Nacional 226 km 73.5, C.C. 276, B7620BKL Balcarce, Buenos Aires, Argentina
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27
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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. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 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] [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.
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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
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28
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Di Bella CE, Kotula L, Striker GG, Colmer TD. Submergence tolerance and recovery in Lotus: Variation among fifteen accessions in response to partial and complete submergence. JOURNAL OF PLANT PHYSIOLOGY 2020; 249:153180. [PMID: 32422486 DOI: 10.1016/j.jplph.2020.153180] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2020] [Revised: 04/11/2020] [Accepted: 04/18/2020] [Indexed: 06/11/2023]
Abstract
Several Lotus species are perennial forage legumes which tolerate waterlogging, but knowledge of responses to partial or complete shoot submergence is scant. We evaluated the responses of 15 Lotus accessions to partial and complete shoot submergence and variations in traits associated with tolerance and recovery after de-submergence. Accessions of Lotus tenuis, L. corniculatus, L. pedunculatus and L. japonicus were raised for 43 d and then subjected to aerated root zone (control), deoxygenated stagnant root zone with shoots in air (stagnant), stagnant root zone with partial (75 %) and complete submergence of shoots, for 7 d. The recovery ability from complete submergence was also assessed. We found inter- and intra-specific variations in the stem extension responses (i.e. promoted or restricted compared to controls) depending on water depth. Eight of 15 accessions promoted the stem extension when in partial submergence, while three of those eight (all L. tenuis accessions) had a restricted stem extension when under complete submergence. Two accessions (belonging to L. corniculatus and L. penduculatus species) also promoted the stem extension under complete submergence. The accessions that attained better recovery in terms of leaves produced after de-submergence, were those that had high leaf and root sugar concentration at de-submergence, and high thickness and persistence of gas films on leaves during submergence (all L. tenuis accessions). We conclude that all Lotus accessions were able to tolerate 7 d of partial and complete shoot submergence, despite adopting different stem extension responses.
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Affiliation(s)
- Carla E Di Bella
- IFEVA, Universidad de Buenos Aires, CONICET, Facultad de Agronomía, Av. San Martín 4453, C1417DSE, Buenos Aires, Argentina.
| | - Lukasz Kotula
- UWA School of Agriculture and Environment, Faculty of Science, The University of Western Australia, Crawley WA 6009, Australia; ARC Industrial Transformation Research Hub on Legumes for Sustainable Agriculture, Faculty of Science, The University of Western Australia, Crawley WA 6009, Australia
| | - Gustavo G Striker
- IFEVA, Universidad de Buenos Aires, CONICET, Facultad de Agronomía, Av. San Martín 4453, C1417DSE, Buenos Aires, Argentina; UWA School of Agriculture and Environment, Faculty of Science, The University of Western Australia, Crawley WA 6009, Australia
| | - Timothy D Colmer
- UWA School of Agriculture and Environment, Faculty of Science, The University of Western Australia, Crawley WA 6009, Australia; ARC Industrial Transformation Research Hub on Legumes for Sustainable Agriculture, Faculty of Science, The University of Western Australia, Crawley WA 6009, Australia
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29
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Savchenko T, Rolletschek H, Heinzel N, Tikhonov K, Dehesh K. Waterlogging tolerance rendered by oxylipin-mediated metabolic reprogramming in Arabidopsis. JOURNAL OF EXPERIMENTAL BOTANY 2019; 70:2919-2932. [PMID: 30854562 PMCID: PMC6506769 DOI: 10.1093/jxb/erz110] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2018] [Accepted: 02/26/2019] [Indexed: 05/20/2023]
Abstract
Environmental stresses induce production of oxylipins synthesized by the two main biosynthetic branches, allene oxide synthase (AOS) and hydroperoxide lyase (HPL). Here, we investigate how waterlogging-mediated alteration of AOS- and HPL-derived metabolic profile results in modulation of central metabolism and ultimately enhanced tolerance to this environmental stress in Arabidopsis thaliana. Waterlogging leads to increased levels of AOS- and HPL-derived metabolites, and studies of genotypes lacking either one or both branches further support the key function of these oxylipins in waterlogging tolerance. Targeted quantitative metabolic profiling revealed oxylipin-dependent alterations in selected primary metabolites, and glycolytic and citric acid cycle intermediates, as well as a prominent shift in sucrose cleavage, hexose activation, the methionine salvage pathway, shikimate pathway, antioxidant system, and energy metabolism in genotypes differing in the presence of one or both functional branches of the oxylipin biosynthesis pathway. Interestingly, despite some distinct metabolic alterations caused specifically by individual branches, overexpression of HPL partially or fully alleviates the majority of altered metabolic profiles observed in AOS-depleted lines. Collectively, these data identify the key role of AOS- and HPL-derived oxylipins in altering central metabolism, and further provide a metabolic platform targeted at identification of gene candidates for enhancing plant tolerance to waterlogging.
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Affiliation(s)
- Tatyana Savchenko
- Institute of Basic Biological Problems, RAS, Pushchino, Russia
- Correspondence:
| | - Hardy Rolletschek
- Leibniz Institute of Plant Genetics and Crop Plant Research (IPK), Gatersleben, Germany
| | - Nicolas Heinzel
- Leibniz Institute of Plant Genetics and Crop Plant Research (IPK), Gatersleben, Germany
| | | | - Katayoon Dehesh
- Institute for Integrative Genome Biology, and Department of Botany and Plant Sciences, University of California, Riverside, CA, USA
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30
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Eysholdt‐Derzsó E, Sauter M. Hypoxia and the group VII ethylene response transcription factor HRE2 promote adventitious root elongation in Arabidopsis. PLANT BIOLOGY (STUTTGART, GERMANY) 2019; 21 Suppl 1:103-108. [PMID: 29996004 PMCID: PMC6585952 DOI: 10.1111/plb.12873] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2018] [Accepted: 07/09/2018] [Indexed: 05/17/2023]
Abstract
Soil water-logging and flooding are common environmental stress conditions that can impair plant fitness. Roots are the first organs to be confronted with reduced oxygen tension as a result of flooding. While anatomical and morphological adaptations of roots are extensively studied, the root system architecture is only now becoming a focus of flooding research. Adventitious root (AR) formation shifts the root system higher up the plant, thereby facilitating supply with oxygen, and thus improving root and plant survival. We used Arabidopsis knockout mutants and overexpressors of ERFVII transcription factors to study their role in AR formation under hypoxic conditions and in response to ethylene. Results show that ethylene inhibits AR formation. Hypoxia mainly promotes AR elongation rather than formation mediated by ERFVII transcription factors, as indicated by reduced AR elongation in erfVII seedlings. Overexpression of HRE2 induces AR elongation to the same degree as hypoxia, while ethylene overrides HRE2-induced AR elongation. The ERFVII transcription factors promote establishment of an AR system that is under negative control by ethylene. Inhibition of growth of the main root system and promotion of AR elongation under hypoxia strengthens the root system in upper soil layers where oxygen shortage may last for shorter time periods.
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Affiliation(s)
- E. Eysholdt‐Derzsó
- Plant Developmental Biology and Plant PhysiologyUniversity of KielKielGermany
| | - M. Sauter
- Plant Developmental Biology and Plant PhysiologyUniversity of KielKielGermany
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31
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Loka D, Harper J, Humphreys M, Gasior D, Wootton-Beard P, Gwynn-Jones D, Scullion J, Doonan J, Kingston-Smith A, Dodd R, Wang J, Chadwick D, Hill P, Jones D, Mills G, Hayes F, Robinson D. Impacts of abiotic stresses on the physiology and metabolism of cool-season grasses: A review. Food Energy Secur 2018. [DOI: 10.1002/fes3.152] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Affiliation(s)
- Dimitra Loka
- DEMETER; Larisa Greece
- IBERS; Aberystwyth University, Gogerddan; Aberystwyth Ceredigion UK
| | - John Harper
- IBERS; Aberystwyth University, Gogerddan; Aberystwyth Ceredigion UK
| | - Mike Humphreys
- IBERS; Aberystwyth University, Gogerddan; Aberystwyth Ceredigion UK
| | - Dagmara Gasior
- IBERS; Aberystwyth University, Gogerddan; Aberystwyth Ceredigion UK
| | | | | | - John Scullion
- IBERS; Aberystwyth University, Gogerddan; Aberystwyth Ceredigion UK
| | - John Doonan
- IBERS; Aberystwyth University, Gogerddan; Aberystwyth Ceredigion UK
| | | | - Rosalind Dodd
- Environment Centre Wales; Bangor University; Gwynedd UK
| | - Jinyang Wang
- Environment Centre Wales; Bangor University; Gwynedd UK
| | | | - Paul Hill
- Environment Centre Wales; Bangor University; Gwynedd UK
| | - Davey Jones
- Environment Centre Wales; Bangor University; Gwynedd UK
| | - Gina Mills
- Centre for Ecology and Hydrology, Environment Centre Wales; Bangor Gwynedd UK
| | - Felicity Hayes
- Centre for Ecology and Hydrology, Environment Centre Wales; Bangor Gwynedd UK
| | - David Robinson
- Centre for Ecology and Hydrology, Environment Centre Wales; Bangor Gwynedd UK
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Abstract
A major problem of climate change is the increasing duration and frequency of heavy rainfall events. This leads to soil flooding that negatively affects plant growth, eventually leading to death of plants if the flooding persists for several days. Most crop plants are very sensitive to flooding, and dramatic yield losses occur due to flooding each year. This review summarizes recent progress and approaches to enhance crop resistance to flooding. Most experiments have been done on maize, barley, and soybean. Work on other crops such as wheat and rape has only started. The most promising traits that might enhance crop flooding tolerance are anatomical adaptations such as aerenchyma formation, the formation of a barrier against radial oxygen loss, and the growth of adventitious roots. Metabolic adaptations might be able to improve waterlogging tolerance as well, but more studies are needed in this direction. Reasonable approaches for future studies are quantitative trait locus (QTL) analyses or genome-wide association (GWA) studies in combination with specific tolerance traits that can be easily assessed. The usage of flooding-tolerant relatives or ancestral cultivars of the crop of interest in these experiments might enhance the chances of finding useful tolerance traits to be used in breeding.
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A stress recovery signaling network for enhanced flooding tolerance in Arabidopsis thaliana. Proc Natl Acad Sci U S A 2018; 115:E6085-E6094. [PMID: 29891679 PMCID: PMC6042063 DOI: 10.1073/pnas.1803841115] [Citation(s) in RCA: 82] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Abiotic stresses in plants are often transient, and the recovery phase following stress removal is critical. Flooding, a major abiotic stress that negatively impacts plant biodiversity and agriculture, is a sequential stress where tolerance is strongly dependent on viability underwater and during the postflooding period. Here we show that in Arabidopsis thaliana accessions (Bay-0 and Lp2-6), different rates of submergence recovery correlate with submergence tolerance and fecundity. A genome-wide assessment of ribosome-associated transcripts in Bay-0 and Lp2-6 revealed a signaling network regulating recovery processes. Differential recovery between the accessions was related to the activity of three genes: RESPIRATORY BURST OXIDASE HOMOLOG D, SENESCENCE-ASSOCIATED GENE113, and ORESARA1, which function in a regulatory network involving a reactive oxygen species (ROS) burst upon desubmergence and the hormones abscisic acid and ethylene. This regulatory module controls ROS homeostasis, stomatal aperture, and chlorophyll degradation during submergence recovery. This work uncovers a signaling network that regulates recovery processes following flooding to hasten the return to prestress homeostasis.
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Bechtold U, Ferguson JN, Mullineaux PM. To defend or to grow: lessons from Arabidopsis C24. JOURNAL OF EXPERIMENTAL BOTANY 2018; 69:2809-2821. [PMID: 29562306 DOI: 10.1093/jxb/ery106] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2017] [Accepted: 03/13/2018] [Indexed: 06/08/2023]
Abstract
The emergence of Arabidopsis as a model species and the availability of genetic and genomic resources have resulted in the identification and detailed characterization of abiotic stress signalling pathways. However, this has led only to limited success in engineering abiotic stress tolerance in crops. This is because there needs to be a deeper understanding of how to combine resistances to a range of stresses with growth and productivity. The natural variation and genomic resources of Arabidopsis thaliana (Arabidopsis) are a great asset to understand the mechanisms of multiple stress tolerances. One natural variant in Arabidopsis is the accession C24, and here we provide an overview of the increasing research interest in this accession. C24 is highlighted as a source of tolerance for multiple abiotic and biotic stresses, and a key accession to understand the basis of basal immunity to infection, high water use efficiency, and water productivity. Multiple biochemical, physiological, and phenological mechanisms have been attributed to these traits in C24, and none of them constrains productivity. Based on the uniqueness of C24, we postulate that the use of variation derived from natural selection in undomesticated species provides opportunities to better understand how complex environmental stress tolerances and resource use efficiency are co-ordinated.
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Affiliation(s)
- Ulrike Bechtold
- University of Essex, School of Biological Sciences, Wivenhoe Park, Colchester, UK
| | - John N Ferguson
- Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, IL, USA
| | - Philip M Mullineaux
- University of Essex, School of Biological Sciences, Wivenhoe Park, Colchester, UK
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Vwioko E, Adinkwu O, El-Esawi MA. Comparative Physiological, Biochemical, and Genetic Responses to Prolonged Waterlogging Stress in Okra and Maize Given Exogenous Ethylene Priming. Front Physiol 2017; 8:632. [PMID: 28993735 PMCID: PMC5622204 DOI: 10.3389/fphys.2017.00632] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2017] [Accepted: 08/14/2017] [Indexed: 01/03/2023] Open
Abstract
Waterlogging is an environmental challenge affecting crops worldwide. Ethylene induces the expression of genes linked to important agronomic traits under waterlogged conditions. The ability of okra (Abelmoschus esculentus L. Moench.) and maize (Zea mays L.) given exogenous ethylene priming to tolerate prolonged waterlogged conditions was investigated in this study. The investigation was carried out as field experiments using 3 week-old plants grouped into four treatments; control, waterlogged plants, ethylene priming of plants before waterlogging, and ethylene priming of plants after waterlogging. Different growth parameters were recorded. Soil chemical and bacterial analyses were performed. The activity and gene expression of antioxidant enzymes were studied. The ethylene biosynthetic genes expression analysis and root anatomy of surviving okra plants were also carried out. Results revealed that okra and maize plants showed increase in their height under waterlogged conditions. Ethylene priming and waterlogged conditions induced early production of adventitious roots in okra and maize. Maize survival lasted between 5 and 9 weeks under waterlogging without reaching the flowering stage. However, okra survived up to 15 weeks under waterlogging producing flower buds and fruits in all treatments. Variable changes were also recorded for total soluble phenolics of soil. Cross sections of waterlogged okra roots showed the formation of a dark peripheral layer and numerous large aerenchyma cells which may have assisted in trapping oxygen required for survival. The activity and gene expression levels of antioxidant enzymes were studied and showed higher increases in the root and leaf tissues of okra and maize subjected to both waterlogging and ethylene priming, as compared to control or waterlogged condition. Quantitative RT-PCR analysis also showed that the ethylene biosynthetic gene expression levels in all okra and maize tissues were up-regulated and showed much higher levels under ethylene-treated waterlogged conditions than those expressed under control or waterlogged conditions at all time points. These results indicate that okra and maize tissues respond to the conditions of waterlogging and exogenous ethylene priming by inducing their ethylene biosynthetic genes expression in order to enhance ethylene production and tolerate the prolonged waterlogging stress. In conclusion, this study revealed that exogenously generated ethylene gas as a priming treatment before or after waterlogging could enhance waterlogging tolerance in maize and okra crops.
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Affiliation(s)
- Emuejevoke Vwioko
- Department of Plant Biotechnology, Faculty of Life Sciences, University of BeninBenin, Nigeria
| | - Onyekachukwu Adinkwu
- Department of Plant Biotechnology, Faculty of Life Sciences, University of BeninBenin, Nigeria
| | - Mohamed A El-Esawi
- Botany Department, Faculty of Science, Tanta UniversityTanta, Egypt.,The Sainsbury Laboratory, University of CambridgeCambridge, United Kingdom
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36
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Wang X, Jiang Y, Zhao X, Song X, Xiao X, Pei Z, Liu H. Association of Candidate Genes With Submergence Response in Perennial Ryegrass. FRONTIERS IN PLANT SCIENCE 2017; 8:791. [PMID: 28559908 PMCID: PMC5432546 DOI: 10.3389/fpls.2017.00791] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/25/2017] [Accepted: 04/27/2017] [Indexed: 06/07/2023]
Abstract
Perennial ryegrass is a popular cool-season grass species due to its high quality for forage and turf. The objective of this study was to identify associations of candidate genes with growth and physiological traits to submergence stress and recovery after de-submergence in a global collection of 94 perennial ryegrass accessions. Accessions varied largely in leaf color, plant height (HT), leaf fresh weight (LFW), leaf dry weight (LDW), and chlorophyll fluorescence (Fv/Fm) at 7 days of submergence and in HT, LFW and LDW at 7 days of recovery in two experiments. Among 26 candidate genes tested by various models, single nucleotide polymorphisms (SNPs) in 10 genes showed significant associations with traits including 16 associations for control, 10 for submergence, and 8 for recovery. Under submergence, Lp1-SST encoding sucrose:sucrose 1-fructosyltransferase and LpGA20ox encoding gibberellin 20-oxidase were associated with LFW and LDW, and LpACO1 encoding 1-aminocyclopropane-1-carboxylic acid oxidase was associated with LFW. Associations between Lp1-SST and HT, Lp6G-FFT encoding fructan:fructan 6G-fructosyltransferase and Fv/Fm, LpCAT encoding catalase and HT were also detected under submergence stress. Upon de-submergence, Lp1-SST, Lp6G-FFT, and LpPIP1 encoding plasma membrane intrinsic protein type 1 were associated with LFW or LDW, while LpCBF1b encoding C-repeat binding factor were associated with HT. Nine significant SNPs in Lp1-SST, Lp6G-FFT, LpCAT, and LpACO1 resulted in amino acid changes with five substitutions found in Lp1-SST under submergence or recovery. The results indicated that allelic diversity in genes involved in carbohydrate and antioxidant metabolism, ethylene and gibberellin biosynthesis, and transcript factor could contribute to growth variations in perennial ryegrass under submergence stress and recovery after de-submergence.
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Affiliation(s)
- Xicheng Wang
- Institute of Pomology, Jiangsu Academy of Agricultural Sciences and Jiangsu Key Laboratory for Horticultural Crop Genetic ImprovementNanjing, China
| | - Yiwei Jiang
- College of Agronomy and Resources and Environment, Tianjin Agricultural UniversityTianjin, China
- Department of Agronomy, Purdue University, West LafayetteIN, USA
| | - Xiongwei Zhao
- Department of Agronomy, Purdue University, West LafayetteIN, USA
- Department of Crop Genetics and Breeding, Sichuan Agricultural UniversityChengdu, China
| | - Xin Song
- College of Pastoral Agriculture Science and Technology, Lanzhou UniversityLanzhou, China
| | - Xiangye Xiao
- Department of Agronomy, Purdue University, West LafayetteIN, USA
| | - Zhongyou Pei
- College of Agronomy and Resources and Environment, Tianjin Agricultural UniversityTianjin, China
| | - Huifen Liu
- College of Agronomy and Resources and Environment, Tianjin Agricultural UniversityTianjin, China
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37
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Akman M, Kleine R, van Tienderen PH, Schranz EM. Identification of the Submergence Tolerance QTL Come Quick Drowning1 (CQD1) in Arabidopsis thaliana. J Hered 2017; 108:308-317. [DOI: 10.1093/jhered/esx014] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2016] [Accepted: 02/12/2017] [Indexed: 01/03/2023] Open
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38
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Wright AJ, de Kroon H, Visser EJW, Buchmann T, Ebeling A, Eisenhauer N, Fischer C, Hildebrandt A, Ravenek J, Roscher C, Weigelt A, Weisser W, Voesenek LACJ, Mommer L. Plants are less negatively affected by flooding when growing in species-rich plant communities. THE NEW PHYTOLOGIST 2017; 213:645-656. [PMID: 27717024 DOI: 10.1111/nph.14185] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/04/2016] [Accepted: 08/04/2016] [Indexed: 05/07/2023]
Abstract
Flooding is expected to increase in frequency and severity in the future. The ecological consequences of flooding are the combined result of species-specific plant traits and ecological context. However, the majority of past flooding research has focused on individual model species under highly controlled conditions. An early summer flooding event in a grassland biodiversity experiment in Jena, Germany, provided the opportunity to assess flooding responses of 60 grassland species in monocultures and 16-species mixtures. We examined plant biomass, species-specific traits (plant height, specific leaf area (SLA), root aerenchyma, starch content) and soil porosity. We found that, on average, plant species were less negatively affected by the flood when grown in higher-diversity plots in July 2013. By September 2013, grasses were unaffected by the flood regardless of plant diversity, and legumes were severely negatively affected regardless of plant diversity. Plants with greater SLA and more root aerenchyma performed better in September. Soil porosity was higher in higher-diversity plots and had a positive effect on plant performance. As floods become more frequent and severe in the future, growing flood-sensitive plants in higher-diversity communities and in soil with greater soil aeration may attenuate the most negative effects of flooding.
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Affiliation(s)
- Alexandra J Wright
- German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, 04103, Leipzig, Germany
- FIT - Science & Mathematics, 227 W 27th St., New York, NY, 11201, USA
| | - Hans de Kroon
- Experimental Plant Ecology, Institute for Water and Wetland Research, Radboud University, 6500 GL, Nijmegen, the Netherlands
| | - Eric J W Visser
- Experimental Plant Ecology, Institute for Water and Wetland Research, Radboud University, 6500 GL, Nijmegen, the Netherlands
| | - Tina Buchmann
- Department Community Ecology, UFZ-Helmholtz Centre for Environmental Research, Theodor-Lieser-Str. 4, 06120, Halle (Saale), Germany
| | - Anne Ebeling
- Institute of Ecology, Friedrich Schiller University Jena, Dornburger Straße 159, 07743, Jena, Germany
| | - Nico Eisenhauer
- German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, 04103, Leipzig, Germany
- Institute of Biology, Leipzig University, Johannisallee 21, 04103, Leipzig, Germany
| | - Christine Fischer
- Institute of Geoscience, Friedrich-Schiller-University Jena, Burgweg 11, D-07749, Jena, Germany
- Department of Conservation Biology, UFZ-Helmholtz Centre for Environmental Research, Permoserstrasse 15, 04318 Leipzig, Germany
| | - Anke Hildebrandt
- Institute of Ecology, Friedrich Schiller University Jena, Dornburger Straße 159, 07743, Jena, Germany
- Institute of Geoscience, Friedrich-Schiller-University Jena, Burgweg 11, D-07749, Jena, Germany
- Max Planck Institute for Biogeochemistry, Hans-Knöll-Straße 10, 07745, Jena, Germany
| | - Janneke Ravenek
- Experimental Plant Ecology, Institute for Water and Wetland Research, Radboud University, 6500 GL, Nijmegen, the Netherlands
| | - Christiane Roscher
- Institute of Ecology, Friedrich Schiller University Jena, Dornburger Straße 159, 07743, Jena, Germany
- Physiological Diversity, UFZ-Helmholtz Centre for Environmental Research, 04318, Leipzig, Germany
| | - Alexandra Weigelt
- German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, 04103, Leipzig, Germany
- Institute of Biology, Leipzig University, Johannisallee 21, 04103, Leipzig, Germany
| | - Wolfgang Weisser
- Lehrstuhl für Terrestrische Ökologie, Technische Universität München, 85354, Freising, Germany
| | - Laurentius A C J Voesenek
- Plant Ecophysiology, Institute of Environmental Biology, Padualaan 8, 3584 CH, Utrecht, the Netherlands
| | - Liesje Mommer
- Plant Ecology and Nature Conservation Group, Wageningen University, PO Box 47, 6700 AA, Wageningen, the Netherlands
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39
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Vashisht D, van Veen H, Akman M, Sasidharan R. Variation in Arabidopsis flooding responses identifies numerous putative "tolerance genes". PLANT SIGNALING & BEHAVIOR 2016; 11:e1249083. [PMID: 27830990 PMCID: PMC5157898 DOI: 10.1080/15592324.2016.1249083] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/03/2016] [Accepted: 10/11/2016] [Indexed: 05/31/2023]
Abstract
Plant survival in flooded environments requires a combinatory response to multiple stress conditions such as limited light availability, reduced gas exchange and nutrient uptake. The ability to fine-tune the molecular response at the transcriptional and/or post-transcriptional level that can eventually lead to metabolic and anatomical adjustments are the underlying requirements to confer tolerance. Previously, we compared the transcriptomic adjustment of submergence tolerant, intolerant accessions and identified a core conserved and genotype-specific response to flooding stress, identifying numerous 'putative' tolerance genes. Here, we performed genome wide association analyses on 81 natural Arabidopsis accessions that identified 30 additional SNP markers associated with flooding tolerance. We argue that, given the many genes associated with flooding tolerance in Arabidopsis, improving resistance to submergence requires numerous genetic changes.
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Affiliation(s)
- Divya Vashisht
- Gregor Mendel Institute of Molecular Plant Biology, Austrian Academy of Sciences, Vienna, Austria
| | - Hans van Veen
- Institute of Life Sciences, Scuola Superiore Sant'Anna, Pisa, Italy
| | - Melis Akman
- Plant and Environmental Sciences, University of California, Davis, USA
| | - Rashmi Sasidharan
- Plant Ecophysiology, Institute of Environmental Biology, Utrecht University, Utrecht, The Netherlands
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40
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Loreti E, van Veen H, Perata P. Plant responses to flooding stress. CURRENT OPINION IN PLANT BIOLOGY 2016; 33:64-71. [PMID: 27322538 DOI: 10.1016/j.pbi.2016.06.005] [Citation(s) in RCA: 142] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2016] [Revised: 06/04/2016] [Accepted: 06/06/2016] [Indexed: 05/18/2023]
Abstract
Most plant species cannot survive prolonged submergence or soil waterlogging. Crops are particularly intolerant to the lack of oxygen arising from submergence. Rice can instead germinate and grow even if submerged. The molecular basis for rice tolerance was recently unveiled and will contribute to the development of better rice varieties, well adapted to flooding. The oxygen sensing mechanism was also recently discovered. This system likely operates in all plant species and relies on the oxygen-dependent destabilization of the group VII ethylene response factors (ERFVIIs), a cluster of ethylene responsive transcription factors. An homeostatic mechanism that controls gene expression in plants subjected to hypoxia prevents excessive activation of the anaerobic metabolism that could be detrimental to surviving the stress.
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Affiliation(s)
- Elena Loreti
- Institute of Agricultural Biology and Biotechnology, CNR, Pisa, Italy
| | - Hans van Veen
- PlantLab, Institute of Life Sciences, Scuola Superiore Sant'Anna, 56124 Pisa, Italy
| | - Pierdomenico Perata
- PlantLab, Institute of Life Sciences, Scuola Superiore Sant'Anna, 56124 Pisa, Italy.
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41
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Shahzad Z, Canut M, Tournaire-Roux C, Martinière A, Boursiac Y, Loudet O, Maurel C. A Potassium-Dependent Oxygen Sensing Pathway Regulates Plant Root Hydraulics. Cell 2016; 167:87-98.e14. [PMID: 27641502 DOI: 10.1016/j.cell.2016.08.068] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2016] [Revised: 08/01/2016] [Accepted: 08/25/2016] [Indexed: 01/02/2023]
Abstract
Aerobic organisms survive low oxygen (O2) through activation of diverse molecular, metabolic, and physiological responses. In most plants, root water permeability (in other words, hydraulic conductivity, Lpr) is downregulated under O2 deficiency. Here, we used a quantitative genetics approach in Arabidopsis to clone Hydraulic Conductivity of Root 1 (HCR1), a Raf-like MAPKKK that negatively controls Lpr. HCR1 accumulates and is functional under combined O2 limitation and potassium (K(+)) sufficiency. HCR1 regulates Lpr and hypoxia responsive genes, through the control of RAP2.12, a key transcriptional regulator of the core anaerobic response. A substantial variation of HCR1 in regulating Lpr is observed at the Arabidopsis species level. Thus, by combinatorially integrating two soil signals, K(+) and O2 availability, HCR1 modulates the resilience of plants to multiple flooding scenarios.
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Affiliation(s)
- Zaigham Shahzad
- Biochimie et Physiologie Moléculaire des Plantes, UMR5004, INRA/CNRS/Montpellier SupAgro/Université Montpellier, 34060 Montpellier, France
| | - Matthieu Canut
- Institut Jean-Pierre Bourgin, INRA/AgroParisTech/CNRS/Université Paris-Saclay, RD10, 78026 Versailles Cedex, France
| | - Colette Tournaire-Roux
- Biochimie et Physiologie Moléculaire des Plantes, UMR5004, INRA/CNRS/Montpellier SupAgro/Université Montpellier, 34060 Montpellier, France
| | - Alexandre Martinière
- Biochimie et Physiologie Moléculaire des Plantes, UMR5004, INRA/CNRS/Montpellier SupAgro/Université Montpellier, 34060 Montpellier, France
| | - Yann Boursiac
- Biochimie et Physiologie Moléculaire des Plantes, UMR5004, INRA/CNRS/Montpellier SupAgro/Université Montpellier, 34060 Montpellier, France
| | - Olivier Loudet
- Institut Jean-Pierre Bourgin, INRA/AgroParisTech/CNRS/Université Paris-Saclay, RD10, 78026 Versailles Cedex, France
| | - Christophe Maurel
- Biochimie et Physiologie Moléculaire des Plantes, UMR5004, INRA/CNRS/Montpellier SupAgro/Université Montpellier, 34060 Montpellier, France.
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42
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Rivera-Contreras IK, Zamora-Hernández T, Huerta-Heredia AA, Capataz-Tafur J, Barrera-Figueroa BE, Juntawong P, Peña-Castro JM. Transcriptomic analysis of submergence-tolerant and sensitive Brachypodium distachyon ecotypes reveals oxidative stress as a major tolerance factor. Sci Rep 2016; 6:27686. [PMID: 27282694 PMCID: PMC4901394 DOI: 10.1038/srep27686] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2016] [Accepted: 05/19/2016] [Indexed: 01/01/2023] Open
Abstract
When excessive amounts of water accumulate around roots and aerial parts of plants, submergence stress occurs. To find the integrated mechanisms of tolerance, we used ecotypes of the monocot model plant Brachypodium distachyon to screen for genetic material with contrasting submergence tolerance. For this purpose, we used a set of previously studied drought sensitive/tolerant ecotypes and the knowledge that drought tolerance is positively associated with submergence stress. We decided to contrast aerial tissue transcriptomes of the ecotype Bd21 14-day-old plants as sensitive and ecotype Bd2-3 as tolerant after 2 days of stress under a long-day photoperiod. Gene ontology and the grouping of transcripts indicated that tolerant Bd2-3 differentially down-regulated NITRATE REDUCTASE and ALTERNATIVE OXIDASE under stress and constitutively up-regulated HAEMOGLOBIN, when compared with the sensitive ecotype, Bd21. These results suggested the removal of nitric oxide, a gaseous phytohormone and concomitant reactive oxygen species as a relevant tolerance determinant. Other mechanisms more active in tolerant Bd2-3 were the pathogen response, glyoxylate and tricarboxylic acid cycle integration, and acetate metabolism. This data set could be employed to design further studies on the basic science of plant tolerance to submergence stress and its biotechnological application in the development of submergence-tolerant crops.
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Affiliation(s)
- Irma Karla Rivera-Contreras
- Laboratorio de Biotecnología Vegetal, Instituto de Biotecnología, Universidad del Papaloapan, Tuxtepec, Oaxaca, México.,División de Estudios de Posgrado, Universidad del Papaloapan, Tuxtepec, Oaxaca, México
| | - Teresa Zamora-Hernández
- Laboratorio de Biotecnología Vegetal, Instituto de Biotecnología, Universidad del Papaloapan, Tuxtepec, Oaxaca, México.,División de Estudios de Posgrado, Universidad del Papaloapan, Tuxtepec, Oaxaca, México
| | - Ariana Arlene Huerta-Heredia
- Catedrática CONACyT-UNPA, Universidad del Papaloapan, Tuxtepec, Oaxaca, México.,Laboratorio de Cultivo de Células Vegetales, Instituto de Biotecnología, Universidad del Papaloapan, Tuxtepec, Oaxaca, Mexico
| | - Jacqueline Capataz-Tafur
- Laboratorio de Cultivo de Células Vegetales, Instituto de Biotecnología, Universidad del Papaloapan, Tuxtepec, Oaxaca, Mexico
| | | | - Piyada Juntawong
- Department of Genetics, Faculty of Science, Kasetsart University, Bangkok, Thailand
| | - Julián Mario Peña-Castro
- Laboratorio de Biotecnología Vegetal, Instituto de Biotecnología, Universidad del Papaloapan, Tuxtepec, Oaxaca, México
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43
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Wang Z, Xu L, Zhao J, Wang X, White JC, Xing B. CuO Nanoparticle Interaction with Arabidopsis thaliana: Toxicity, Parent-Progeny Transfer, and Gene Expression. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2016; 50:6008-6016. [PMID: 27226046 DOI: 10.1021/acs.est.6b01017] [Citation(s) in RCA: 89] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
CuO nanoparticles (NPs) (20, 50 mg L(-1)) inhibited seedling growth of different Arabidopsis thaliana ecotypes (Col-0, Bay-0, and Ws-2), as well as the germination of their pollens and harvested seeds. For most of growth parameters (e.g., biomass, relative growth rate, root morphology change), Col-0 was the more sensitive ecotype to CuO NPs compared to Bay-0 and Ws-2. Equivalent Cu(2+) ions and CuO bulk particles had no effect on Arabidopsis growth. After CuO NPs (50 mg L(-1)) exposure, Cu was detected in the roots, leaves, flowers and harvested seeds of Arabidopsis, and its contents were significantly higher than that in CuO bulk particles (50 mg L(-1)) and Cu(2+) ions (0.15 mg L(-1)) treatments. Based on X-ray absorption near-edge spectroscopy analysis (XANES), Cu in the harvested seeds was confirmed as being mainly in the form of CuO (88.8%), which is the first observation on the presence of CuO NPs in the plant progeny. Moreover, after CuO NPs exposure, two differentially expressed genes (C-1 and C-3) that regulated root growth and reactive oxygen species generation were identified, which correlated well with the physiological root inhibition and oxidative stress data. This current study provides direct evidence for the negative effects of CuO NPs on Arabidopsis, including accumulation and parent-progeny transfer of the particles, which may have significant implications with regard to the risk of NPs to food safety and security.
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Affiliation(s)
- Zhenyu Wang
- Institute of Costal Environmental Pollution Control, and Ministry of Education Key Laboratory of Marine Environment and Ecology, Ocean University of China , Qingdao 266100, China
- Laboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071, China
| | - Lina Xu
- Institute of Costal Environmental Pollution Control, and Ministry of Education Key Laboratory of Marine Environment and Ecology, Ocean University of China , Qingdao 266100, China
| | - Jian Zhao
- Institute of Costal Environmental Pollution Control, and Ministry of Education Key Laboratory of Marine Environment and Ecology, Ocean University of China , Qingdao 266100, China
- Laboratory for Marine Ecology and Environmental Science, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071, China
| | - Xiangke Wang
- School of Environment and Chemical Engineering, North China Electric Power University , Beijing 102206, China
| | - Jason C White
- Department of Analytical Chemistry, The Connecticut Agricultural Experiment Station, New Haven, Connecticut 06504, United States
| | - Baoshan Xing
- Stockbridge School of Agriculture, University of Massachusetts , Amherst, Massachusetts 01003, United States
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Voesenek LACJ, Sasidharan R, Visser EJW, Bailey-Serres J. Flooding stress signaling through perturbations in oxygen, ethylene, nitric oxide and light. THE NEW PHYTOLOGIST 2016; 209:39-43. [PMID: 26625347 DOI: 10.1111/nph.13775] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Affiliation(s)
- Laurentius A C J Voesenek
- Institute of Environmental Biology, Utrecht University, Padualaan 8, 3584 CH, Utrecht, the Netherlands
| | - Rashmi Sasidharan
- Institute of Environmental Biology, Utrecht University, Padualaan 8, 3584 CH, Utrecht, the Netherlands
| | - Eric J W Visser
- Department of Experimental Plant Ecology, Institute for Water and Wetland Research, Radboud University, Nijmegen, the Netherlands
| | - Julia Bailey-Serres
- Institute of Environmental Biology, Utrecht University, Padualaan 8, 3584 CH, Utrecht, the Netherlands
- Center for Plant Cell Biology, Department of Botany and Plant Sciences, University of California, Riverside, CA, 92521, USA
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Mendiondo GM, Gibbs DJ, Szurman-Zubrzycka M, Korn A, Marquez J, Szarejko I, Maluszynski M, King J, Axcell B, Smart K, Corbineau F, Holdsworth MJ. Enhanced waterlogging tolerance in barley by manipulation of expression of the N-end rule pathway E3 ligase PROTEOLYSIS6. PLANT BIOTECHNOLOGY JOURNAL 2016; 14:40-50. [PMID: 25657015 PMCID: PMC5098238 DOI: 10.1111/pbi.12334] [Citation(s) in RCA: 84] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2014] [Revised: 11/24/2014] [Accepted: 12/15/2014] [Indexed: 05/20/2023]
Abstract
Increased tolerance of crops to low oxygen (hypoxia) during flooding is a key target for food security. In Arabidopsis thaliana (L.) Heynh., the N-end rule pathway of targeted proteolysis controls plant responses to hypoxia by regulating the stability of group VII ethylene response factor (ERFVII) transcription factors, controlled by the oxidation status of amino terminal (Nt)-cysteine (Cys). Here, we show that the barley (Hordeum vulgare L.) ERFVII BERF1 is a substrate of the N-end rule pathway in vitro. Furthermore, we show that Nt-Cys acts as a sensor for hypoxia in vivo, as the stability of the oxygen-sensor reporter protein MCGGAIL-GUS increased in waterlogged transgenic plants. Transgenic RNAi barley plants, with reduced expression of the N-end rule pathway N-recognin E3 ligase PROTEOLYSIS6 (HvPRT6), showed increased expression of hypoxia-associated genes and altered seed germination phenotypes. In addition, in response to waterlogging, transgenic plants showed sustained biomass, enhanced yield, retention of chlorophyll, and enhanced induction of hypoxia-related genes. HvPRT6 RNAi plants also showed reduced chlorophyll degradation in response to continued darkness, often associated with waterlogged conditions. Barley Targeting Induced Local Lesions IN Genomes (TILLING) lines, containing mutant alleles of HvPRT6, also showed increased expression of hypoxia-related genes and phenotypes similar to RNAi lines. We conclude that the N-end rule pathway represents an important target for plant breeding to enhance tolerance to waterlogging in barley and other cereals.
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Affiliation(s)
- Guillermina M Mendiondo
- Division of Plant and Crop Sciences, School of Biosciences, University of Nottingham, Loughborough, UK
| | - Daniel J Gibbs
- Division of Plant and Crop Sciences, School of Biosciences, University of Nottingham, Loughborough, UK
| | - Miriam Szurman-Zubrzycka
- Department of Genetics, Faculty of Biology and Environmental Protection, University of Silesia, Katowice, Poland
| | - Arnd Korn
- Division of Plant and Crop Sciences, School of Biosciences, University of Nottingham, Loughborough, UK
- School of Mathematical Sciences, University of Nottingham, University Park, Nottingham, UK
| | - Julietta Marquez
- Division of Plant and Crop Sciences, School of Biosciences, University of Nottingham, Loughborough, UK
| | - Iwona Szarejko
- Department of Genetics, Faculty of Biology and Environmental Protection, University of Silesia, Katowice, Poland
| | - Miroslaw Maluszynski
- Department of Genetics, Faculty of Biology and Environmental Protection, University of Silesia, Katowice, Poland
| | - John King
- School of Mathematical Sciences, University of Nottingham, University Park, Nottingham, UK
| | | | | | - Francoise Corbineau
- Seed Biology Laboratory, UMR 7622 CNRS-UPMC, Sorbonne Universités, Université Pierre et Marie Curie-Paris 6, Paris, France
| | - Michael J Holdsworth
- Division of Plant and Crop Sciences, School of Biosciences, University of Nottingham, Loughborough, UK
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Shukla T, Kumar S, Khare R, Tripathi RD, Trivedi PK. Natural variations in expression of regulatory and detoxification related genes under limiting phosphate and arsenate stress in Arabidopsis thaliana. FRONTIERS IN PLANT SCIENCE 2015; 6:898. [PMID: 26557133 PMCID: PMC4617098 DOI: 10.3389/fpls.2015.00898] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2015] [Accepted: 10/09/2015] [Indexed: 05/07/2023]
Abstract
Abiotic stress including nutrient deficiency and heavy metal toxicity severely affects plant growth, development, and productivity. Genetic variations within and in between species are one of the important factors in establishing interactions and responses of plants with the environment. In the recent past, natural variations in Arabidopsis thaliana have been used to understand plant development and response toward different stresses at genetic level. Phosphorus deficiency negatively affects plant growth and metabolism and modulates expression of the genes involved in Pi homeostasis. Arsenate, As(V), a chemical analog of Pi, is taken up by the plants via phosphate transport system. Studies suggest that during Pi deficiency, enhanced As(V) uptake leads to increased toxicity in plants. Here, the natural variations in Arabidopsis have been utilized to study the As(V) stress response under limiting Pi condition. The primary root length was compared to identify differential response of three Arabidopsis accessions (Col-0, Sij-1, and Slavi-1) under limiting Pi and As(V) stress. To study the molecular mechanisms responsible for the differential response, comprehensive expression profiling of the genes involved in uptake, detoxification, and regulatory mechanisms was carried out. Analysis suggests genetic variation-dependent regulatory mechanisms may affect differential response of Arabidopsis natural variants toward As(V) stress under limiting Pi condition. Therefore, it is hypothesized that detailed analysis of the natural variations under multiple stress conditions might help in the better understanding of the biological processes involved in stress tolerance and adaptation.
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Affiliation(s)
- Tapsi Shukla
- C.S.I.R.-National Botanical Research Institute, Council of Scientific and Industrial ResearchLucknow, India
- Academy of Scientific and Innovative ResearchNew Delhi, India
| | - Smita Kumar
- Department of Biochemistry, University of LucknowLucknow, India
| | - Ria Khare
- C.S.I.R.-National Botanical Research Institute, Council of Scientific and Industrial ResearchLucknow, India
- Academy of Scientific and Innovative ResearchNew Delhi, India
| | - Rudra D. Tripathi
- C.S.I.R.-National Botanical Research Institute, Council of Scientific and Industrial ResearchLucknow, India
- Academy of Scientific and Innovative ResearchNew Delhi, India
| | - Prabodh K. Trivedi
- C.S.I.R.-National Botanical Research Institute, Council of Scientific and Industrial ResearchLucknow, India
- Academy of Scientific and Innovative ResearchNew Delhi, India
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Riber W, Müller JT, Visser EJW, Sasidharan R, Voesenek LACJ, Mustroph A. The greening after extended darkness1 is an N-end rule pathway mutant with high tolerance to submergence and starvation. PLANT PHYSIOLOGY 2015; 167:1616-29. [PMID: 25667318 PMCID: PMC4378152 DOI: 10.1104/pp.114.253088] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2014] [Accepted: 02/08/2015] [Indexed: 05/21/2023]
Abstract
Plants respond to reductions in internal oxygen concentrations with adaptive mechanisms (for example, modifications of metabolism to cope with reduced supply of ATP). These responses are, at the transcriptional level, mediated by the group VII Ethylene Response Factor transcription factors, which have stability that is regulated by the N-end rule pathway of protein degradation. N-end rule pathway mutants are characterized by a constitutive expression of hypoxia response genes and abscisic acid hypersensitivity. Here, we identify a novel proteolysis6 (prt6) mutant allele, named greening after extended darkness1 (ged1), which was previously discovered in a screen for genomes uncoupled-like mutants and shows the ability to withstand long periods of darkness at the seedling stage. Interestingly, this ethyl methanesulfonate-derived mutant shows unusual chromosomal rearrangement instead of a point mutation. Furthermore, the sensitivity of N-end rule pathway mutants ged1 and prt6-1 to submergence was studied in more detail to understand previously contradicting experiments on this topic. Finally, it was shown that mutants for the N-end rule pathway are generally more tolerant to starvation conditions, such as prolonged darkness or submergence, which was partially associated with carbohydrate conservation.
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Affiliation(s)
- Willi Riber
- Plant Physiology, University Bayreuth, 95440 Bayreuth, Germany (W.R., J.T.M., A.M.);Department of Experimental Plant Ecology, Institute for Water and Wetland Research, Radboud University, 6525 AJ Nijmegen, The Netherlands (E.J.W.V.); andPlant Ecophysiology, Institute of Environmental Biology, Utrecht University, 3584 CH Utrecht, The Netherlands (R.S., L.A.C.J.V.)
| | - Jana T Müller
- Plant Physiology, University Bayreuth, 95440 Bayreuth, Germany (W.R., J.T.M., A.M.);Department of Experimental Plant Ecology, Institute for Water and Wetland Research, Radboud University, 6525 AJ Nijmegen, The Netherlands (E.J.W.V.); andPlant Ecophysiology, Institute of Environmental Biology, Utrecht University, 3584 CH Utrecht, The Netherlands (R.S., L.A.C.J.V.)
| | - Eric J W Visser
- Plant Physiology, University Bayreuth, 95440 Bayreuth, Germany (W.R., J.T.M., A.M.);Department of Experimental Plant Ecology, Institute for Water and Wetland Research, Radboud University, 6525 AJ Nijmegen, The Netherlands (E.J.W.V.); andPlant Ecophysiology, Institute of Environmental Biology, Utrecht University, 3584 CH Utrecht, The Netherlands (R.S., L.A.C.J.V.)
| | - Rashmi Sasidharan
- Plant Physiology, University Bayreuth, 95440 Bayreuth, Germany (W.R., J.T.M., A.M.);Department of Experimental Plant Ecology, Institute for Water and Wetland Research, Radboud University, 6525 AJ Nijmegen, The Netherlands (E.J.W.V.); andPlant Ecophysiology, Institute of Environmental Biology, Utrecht University, 3584 CH Utrecht, The Netherlands (R.S., L.A.C.J.V.)
| | - Laurentius A C J Voesenek
- Plant Physiology, University Bayreuth, 95440 Bayreuth, Germany (W.R., J.T.M., A.M.);Department of Experimental Plant Ecology, Institute for Water and Wetland Research, Radboud University, 6525 AJ Nijmegen, The Netherlands (E.J.W.V.); andPlant Ecophysiology, Institute of Environmental Biology, Utrecht University, 3584 CH Utrecht, The Netherlands (R.S., L.A.C.J.V.)
| | - Angelika Mustroph
- Plant Physiology, University Bayreuth, 95440 Bayreuth, Germany (W.R., J.T.M., A.M.);Department of Experimental Plant Ecology, Institute for Water and Wetland Research, Radboud University, 6525 AJ Nijmegen, The Netherlands (E.J.W.V.); andPlant Ecophysiology, Institute of Environmental Biology, Utrecht University, 3584 CH Utrecht, The Netherlands (R.S., L.A.C.J.V.)
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Voesenek LACJ, Bailey-Serres J. Flood adaptive traits and processes: an overview. THE NEW PHYTOLOGIST 2015; 206:57-73. [PMID: 25580769 DOI: 10.1111/nph.13209] [Citation(s) in RCA: 330] [Impact Index Per Article: 36.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2014] [Accepted: 10/30/2014] [Indexed: 05/18/2023]
Abstract
Unanticipated flooding challenges plant growth and fitness in natural and agricultural ecosystems. Here we describe mechanisms of developmental plasticity and metabolic modulation that underpin adaptive traits and acclimation responses to waterlogging of root systems and submergence of aerial tissues. This includes insights into processes that enhance ventilation of submerged organs. At the intersection between metabolism and growth, submergence survival strategies have evolved involving an ethylene-driven and gibberellin-enhanced module that regulates growth of submerged organs. Opposing regulation of this pathway is facilitated by a subgroup of ethylene-response transcription factors (ERFs), which include members that require low O₂ or low nitric oxide (NO) conditions for their stabilization. These transcription factors control genes encoding enzymes required for anaerobic metabolism as well as proteins that fine-tune their function in transcription and turnover. Other mechanisms that control metabolism and growth at seed, seedling and mature stages under flooding conditions are reviewed, as well as findings demonstrating that true endurance of submergence includes an ability to restore growth following the deluge. Finally, we highlight molecular insights obtained from natural variation of domesticated and wild species that occupy different hydrological niches, emphasizing the value of understanding natural flooding survival strategies in efforts to stabilize crop yields in flood-prone environments.
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Affiliation(s)
- Laurentius A C J Voesenek
- Institute of Environmental Biology, Utrecht University, Padualaan 8, 3584 CH, Utrecht, the Netherlands
| | - Julia Bailey-Serres
- Institute of Environmental Biology, Utrecht University, Padualaan 8, 3584 CH, Utrecht, the Netherlands
- Center for Plant Cell Biology, Department of Botany and Plant Sciences, University of California, Riverside, CA, 92521, USA
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Mitochondrial Signaling in Plants Under Hypoxia: Use of Reactive Oxygen Species (ROS) and Reactive Nitrogen Species (RNS). SIGNALING AND COMMUNICATION IN PLANTS 2015. [DOI: 10.1007/978-3-319-10079-1_4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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50
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Mutava RN, Prince SJK, Syed NH, Song L, Valliyodan B, Chen W, Nguyen HT. Understanding abiotic stress tolerance mechanisms in soybean: a comparative evaluation of soybean response to drought and flooding stress. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2015; 86:109-120. [PMID: 25438143 DOI: 10.1016/j.plaphy.2014.11.010] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2014] [Accepted: 11/14/2014] [Indexed: 05/20/2023]
Abstract
Many sources of drought and flooding tolerance have been identified in soybean, however underlying molecular and physiological mechanisms are poorly understood. Therefore, it is important to illuminate different plant responses to these abiotic stresses and understand the mechanisms that confer tolerance. Towards this goal we used four contrasting soybean (Glycine max) genotypes (PI 567690--drought tolerant, Pana--drought susceptible, PI 408105A--flooding tolerant, S99-2281--flooding susceptible) grown under greenhouse conditions and compared genotypic responses to drought and flooding at the physiological, biochemical, and cellular level. We also quantified these variations and tried to infer their role in drought and flooding tolerance in soybean. Our results revealed that different mechanisms contribute to reduction in net photosynthesis under drought and flooding stress. Under drought stress, ABA and stomatal conductance are responsible for reduced photosynthetic rate; while under flooding stress, accumulation of starch granules played a major role. Drought tolerant genotypes PI 567690 and PI 408105A had higher plastoglobule numbers than the susceptible Pana and S99-2281. Drought stress increased the number and size of plastoglobules in most of the genotypes pointing to a possible role in stress tolerance. Interestingly, there were seven fibrillin proteins localized within the plastoglobules that were up-regulated in the drought and flooding tolerant genotypes PI 567690 and PI 408105A, respectively, but down-regulated in the drought susceptible genotype Pana. These results suggest a potential role of Fibrillin proteins, FBN1a, 1b and 7a in soybean response to drought and flooding stress.
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Affiliation(s)
- Raymond N Mutava
- National Center for Soybean Biotechnology and Division of Plant Sciences, University of Missouri, Columbia, MO 65211, USA
| | - Silvas Jebakumar K Prince
- National Center for Soybean Biotechnology and Division of Plant Sciences, University of Missouri, Columbia, MO 65211, USA
| | - Naeem Hasan Syed
- School of Human and Life Sciences, Canterbury Christ Church University, Canterbury, CT1 1QU, United Kingdom
| | - Li Song
- National Center for Soybean Biotechnology and Division of Plant Sciences, University of Missouri, Columbia, MO 65211, USA
| | - Babu Valliyodan
- National Center for Soybean Biotechnology and Division of Plant Sciences, University of Missouri, Columbia, MO 65211, USA
| | - Wei Chen
- National Center for Soybean Biotechnology and Division of Plant Sciences, University of Missouri, Columbia, MO 65211, USA
| | - Henry T Nguyen
- National Center for Soybean Biotechnology and Division of Plant Sciences, University of Missouri, Columbia, MO 65211, USA.
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