251
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Fukao T, Barrera-Figueroa BE, Juntawong P, Peña-Castro JM. Submergence and Waterlogging Stress in Plants: A Review Highlighting Research Opportunities and Understudied Aspects. FRONTIERS IN PLANT SCIENCE 2019; 10:340. [PMID: 30967888 PMCID: PMC6439527 DOI: 10.3389/fpls.2019.00340] [Citation(s) in RCA: 141] [Impact Index Per Article: 28.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2018] [Accepted: 03/05/2019] [Indexed: 05/20/2023]
Abstract
Soil flooding creates composite and complex stress in plants known as either submergence or waterlogging stress depending on the depth of the water table. In nature, these stresses are important factors dictating the species composition of the ecosystem. On agricultural land, they cause economic damage associated with long-term social consequences. The understanding of the plant molecular responses to these two stresses has benefited from research studying individual components of the stress, in particular low-oxygen stress. To a lesser extent, other associated stresses and plant responses have been incorporated into the molecular framework, such as ion and ROS signaling, pathogen susceptibility, and organ-specific expression and development. In this review, we aim to highlight known or suspected components of submergence/waterlogging stress that have not yet been thoroughly studied at the molecular level in this context, such as miRNA and retrotransposon expression, the influence of light/dark cycles, protein isoforms, root architecture, sugar sensing and signaling, post-stress molecular events, heavy-metal and salinity stress, and mRNA dynamics (splicing, sequestering, and ribosome loading). Finally, we explore biotechnological strategies that have applied this molecular knowledge to develop cultivars resistant to flooding or to offer alternative uses of flooding-prone soils, like bioethanol and biomass production.
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Affiliation(s)
- Takeshi Fukao
- School of Plant and Environmental Sciences, Virginia Tech, Blacksburg, VA, United States
| | | | - Piyada Juntawong
- Center for Advanced Studies in Tropical Natural Resources, National Research University – 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, Mexico
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252
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Zeng N, Yang Z, Zhang Z, Hu L, Chen L. Comparative Transcriptome Combined with Proteome Analyses Revealed Key Factors Involved in Alfalfa ( Medicago sativa) Response to Waterlogging Stress. Int J Mol Sci 2019; 20:ijms20061359. [PMID: 30889856 PMCID: PMC6471898 DOI: 10.3390/ijms20061359] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2019] [Revised: 03/13/2019] [Accepted: 03/15/2019] [Indexed: 12/26/2022] Open
Abstract
Alfalfa (Medicago sativa) is the most widely grown and most important forage crop in the world. However, alfalfa is susceptible to waterlogging stress, which is the major constraint for its cultivation area and crop production. So far, the molecular mechanism of alfalfa response to the waterlogging is largely unknown. Here, comparative transcriptome combined with proteomic analyses of two cultivars (M12, tolerant; M25, sensitive) of alfalfa showing contrasting tolerance to waterlogging were performed to understand the mechanism of alfalfa in response to waterlogging stress. Totally, 748 (581 up- and 167 down-regulated) genes were differentially expressed in leaves of waterlogging-stressed alfalfa compared with the control (M12_W vs. M12_CK), whereas 1193 (740 up- and 453 down-regulated) differentially abundant transcripts (DATs) were detected in the leaves of waterlogging-stressed plants in comparison with the control plants (M25_W vs. M25_CK). Furthermore, a total of 187 (122 up- and 65 down-regulated) and 190 (105 up- and 85 down-regulated) differentially abundant proteins (DAPs) were identified via isobaric tags for relative and absolute quantification (iTRAQ) method in M12_W vs. M12_CK and M25_W vs. M25_CK comparison, respectively. Compared dataset analysis of proteomics and transcriptomics revealed that 27 and eight genes displayed jointly up-regulated or down-regulated expression profiles at both mRNA and protein levels in M12_W vs. M12_CK comparison, whereas 30 and 27 genes were found to be co-up-regulated or co-down-regulated in M25_W vs. M25_CK comparison, respectively. The strongly enriched Kyoto Encyclopedia of Genes and Genomes (KEGG) pathways for co-up-regulated genes at mRNA and protein levels in M12_W vs. M12_CK comparison were 'Amino sugar and nucleotide sugar metabolism', 'Arginine and proline metabolism' and 'Starch and sucrose metabolism', whereas co-up-regulated protein-related pathways including 'Arginine and proline metabolism' and 'Valine, leucine and isoleucine degradation' were largely enriched in M25_W vs. M25_CK comparison. Importantly, the identified genes related to beta-amylase, Ethylene response Factor (ERF), Calcineurin B-like (CBL) interacting protein kinases (CIPKs), Glutathione peroxidase (GPX), and Glutathione-S-transferase (GST) may play key roles in conferring alfalfa tolerance to waterlogging stress. The present study may contribute to our understanding the molecular mechanism underlying the responses of alfalfa to waterlogging stress, and also provide important clues for further study and in-depth characterization of waterlogging-resistance breeding candidate genes in alfalfa.
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Affiliation(s)
- Ningbo Zeng
- Department of Pratacultural Sciences, College of Agriculture, Hunan Agricultural University, Changsha 410128, China.
| | - Zhijian Yang
- Department of Pratacultural Sciences, College of Agriculture, Hunan Agricultural University, Changsha 410128, China.
| | - Zhifei Zhang
- Department of Pratacultural Sciences, College of Agriculture, Hunan Agricultural University, Changsha 410128, China.
| | - Longxing Hu
- Department of Pratacultural Sciences, College of Agriculture, Hunan Agricultural University, Changsha 410128, China.
| | - Liang Chen
- CAS Key Laboratory of Plant Germplasm Enhancement and Specialty Agriculture, Wuhan Botanical Garden, The Chinese Academy of Science, Wuhan 430074, China.
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253
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Pan DL, Wang G, Wang T, Jia ZH, Guo ZR, Zhang JY. AdRAP2.3, a Novel Ethylene Response Factor VII from Actinidia deliciosa, Enhances Waterlogging Resistance in Transgenic Tobacco through Improving Expression Levels of PDC and ADH Genes. Int J Mol Sci 2019; 20:E1189. [PMID: 30857203 PMCID: PMC6429156 DOI: 10.3390/ijms20051189] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2019] [Revised: 02/28/2019] [Accepted: 03/05/2019] [Indexed: 01/18/2023] Open
Abstract
APETALA2/ethylene-responsive factor superfamily (AP2/ERF) is a transcription factor involved in abiotic stresses, for instance, cold, drought, and low oxygen. In this study, a novel ethylene-responsive transcription factor named AdRAP2.3 was isolated from Actinidia deliciosa 'Jinkui'. AdRAP2.3 transcription levels in other reproductive organs except for the pistil were higher than those in the vegetative organs (root, stem, and leaf) in kiwi fruit. Plant hormones (Salicylic acid (SA), Methyl-jasmonate acid (MeJA), 1-Aminocyclopropanecarboxylic Acid (ACC), Abscisic acid (ABA)), abiotic stresses (waterlogging, heat, 4 °C and NaCl) and biotic stress (Pseudomonas Syringae pv. Actinidiae, Psa) could induce the expression of AdRAP2.3 gene in kiwi fruit. Overexpression of the AdRAP2.3 gene conferred waterlogging stress tolerance in transgenic tobacco plants. When completely submerged, the survival rate, fresh weight, and dry weight of transgenic tobacco lines were significantly higher than those of wile type (WT). Upon the roots being submerged, transgenic tobacco lines grew aerial roots earlier. Overexpression of AdRAP2.3 in transgenic tobacco improved the pyruvate decarboxylase (PDC) and alcohol dehydrogenase (ADH) enzyme activities, and improved the expression levels of waterlogging mark genes NtPDC, NtADH, NtHB1, NtHB2, NtPCO1, and NtPCO2 in roots under waterlogging treatment. Overall, these results demonstrated that AdRAP2.3 might play an important role in resistance to waterlogging through regulation of PDC and ADH genes in kiwi fruit.
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Affiliation(s)
- De-Lin Pan
- Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing 210014, China.
| | - Gang Wang
- Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing 210014, China.
| | - Tao Wang
- Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing 210014, China.
| | - Zhan-Hui Jia
- Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing 210014, China.
| | - Zhong-Ren Guo
- Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing 210014, China.
| | - Ji-Yu Zhang
- Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing 210014, China.
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254
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Tan X, Zwiazek JJ. Stable expression of aquaporins and hypoxia-responsive genes in adventitious roots are linked to maintaining hydraulic conductance in tobacco (Nicotiana tabacum) exposed to root hypoxia. PLoS One 2019; 14:e0212059. [PMID: 30730995 PMCID: PMC6366753 DOI: 10.1371/journal.pone.0212059] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2018] [Accepted: 01/26/2019] [Indexed: 11/22/2022] Open
Abstract
Formation of adventitious roots in plants is a common response to hypoxia caused by flooding. In tobacco, after one week of root hypoxia treatment, plants produced twice as many adventitious roots as the aerated plants, but their maximum length was reduced. Hypoxia severely reduced net photosynthesis, transpiration rates, and photosynthetic light responses. Relative transcript abundance of the examined aquaporins in lateral roots was reduced by hypoxia, but in adventitious roots it remained unchanged. This apparent lack of an effect of root hypoxia on the aquaporin expression likely contributed to maintenance of high hydraulic conductance in adventitious roots. Lateral roots had lower porosity compared with adventitious roots and the expression of the ACS (1-aminocyclopropane-1-carboxylate synthase) gene was induced in hypoxic lateral roots, but not in adventitious roots, providing additional evidence that lateral roots were more affected by hypoxia compared with adventitious roots. ATP concentrations were markedly lower in both hypoxic lateral and adventitious roots compared with aerated roots, while the expression of fermentation-related genes, ADH1 (alcohol dehydrogenase 1) and PDC1 (pyruvate decarboxylase 1), was higher in lateral roots compared with adventitious roots. Since root porosity was greater in adventitious compared with lateral roots, the results suggest that the improved O2 delivery and stable root aquaporin expression in adventitious roots were likely the key factors helping flooded tobacco plants maintain high rates of root hydraulic conductance and, consequently, shoot gas exchange.
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Affiliation(s)
- Xiangfeng Tan
- Department of Renewable Resources, University of Alberta, Edmonton, Alberta, Canada
| | - Janusz J. Zwiazek
- Department of Renewable Resources, University of Alberta, Edmonton, Alberta, Canada
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255
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Panozzo A, Dal Cortivo C, Ferrari M, Vicelli B, Varotto S, Vamerali T. Morphological Changes and Expressions of AOX1A, CYP81D8, and Putative PFP Genes in a Large Set of Commercial Maize Hybrids Under Extreme Waterlogging. FRONTIERS IN PLANT SCIENCE 2019; 10:62. [PMID: 30778365 PMCID: PMC6369177 DOI: 10.3389/fpls.2019.00062] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2018] [Accepted: 01/16/2019] [Indexed: 05/24/2023]
Abstract
Waterlogging is a severe abiotic stressor causing significant growth impairment and yield losses in many crops. Maize is highly sensitive to the excess of water, and against the background of climate change there is an urgent need for deeper insights into the mechanisms of crop adaptation to waterlogging. In the present study, changes in maize morphology at the 4-5 leaf stage and the expression of three candidate genes for flooding tolerance in plants subjected to six continuous days of waterlogging were recorded in 19 commercial hybrids and in the inbred line B73, with the aim of investigating the current variability in cultivated hybrids and identifying useful morphological and molecular markers for screening tolerant genotypes. Here it was demonstrated that root parameters (length, area, biomass) were more impaired by waterlogging than shoot parameters (shoot height and biomass). Culm height generally increased in stressed plants (by up to +24% vs. controls), while shoot biomass was significantly reduced in only two hybrids. Root biomass was reduced in all the hybrids, by an average of 30%, and significantly in 7 hybrids, while root length and area were even more severely reduced, by 30-55% vs. controls, depending on the hybrid. The earlier appearance of aerial roots seemed to be associated with greater root injuries. In leaves, the transcript of the PFP enzyme (phosphofructokinase), which is involved in glycolytic reactions, was markedly up-regulated (up to double the values) in half the waterlogged hybrids, but down-regulated in the others. The transcript of CYP81D8 (ROS-related proteins) in waterlogged plants exhibited relevant increases or strong decreases in level, depending on the hybrid. The transcript of the AOX1A gene, coding for a mitochondrial respiratory electron transport chain-related protein, was markedly down-regulated in all the treated hybrids. Expression analysis of these genes under extreme waterlogging only partially correlate with the shoot and root growth impairments observed, and AOX1A seems to be the most informative of them.
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256
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Zhang Q, Liu X, Zhang Z, Liu N, Li D, Hu L. Melatonin Improved Waterlogging Tolerance in Alfalfa ( Medicago sativa) by Reprogramming Polyamine and Ethylene Metabolism. FRONTIERS IN PLANT SCIENCE 2019; 10:44. [PMID: 30774639 PMCID: PMC6367245 DOI: 10.3389/fpls.2019.00044] [Citation(s) in RCA: 57] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2018] [Accepted: 01/11/2019] [Indexed: 05/20/2023]
Abstract
Melatonin (MT), polyamines (PAs), and ethylene have been suggested to play key roles in plant growth and development in response to environmental abiotic stresses. However, the effect of melatonin on polyamine and ethylene metabolism under waterlogging stress has rarely been elucidated. The main purpose of this study was to investigate the effect of melatonin pretreatment on waterlogging stress in alfalfa. The experiment was arranged into four treatment groups control with water pretreatment (CK-MT), control with melatonin pretreatment (CK+MT), waterlogging pretreated with water (WL-MT) and waterlogging pretreated with melatonin (WL+MT), with three replications. Six-week-old alfalfa seedlings were pretreated with 100 μM melatonin and exposed to waterlogging stress for 10 days. Plant growth rate, different physiological characteristics, and gene expression level were measured. Results showed that waterlogging induced melatonin accumulation, and melatonin pretreatment increased endogenous MT levels for the control and water-logged plants. Waterlogging stress caused a significant reduction in plant growth, chlorophyll content, photochemical efficiency (Fv/Fm) and net photosynthetic rate (Pn), while also causing increased leaf electrolyte leakage (EL) and malondialdehyde (MDA) content. Pretreatment with melatonin alleviated the waterlogging-induced damage and reduction in plant growth, chlorophyll content, Fv/Fm and Pn. Waterlogging stress significantly increased leaf polyamines (Put, Spd, Spm) and ethylene levels, and the increased PAs and ethylene levels are coupled with higher metabolic enzymes and gene expressions. While pretreatment with melatonin further increased Put, Spd and Spm levels, it also decreased ethylene levels under waterlogging, and those increased PAs levels or decreased ethylene levels are regulated by the metabolic enzymes and gene expressions. The results in this study provide more comprehensive insight into the physiological and molecular mechanisms of melatonin-improved waterlogging tolerance in alfalfa. Furthermore, they suggested that melatonin improved waterlogging tolerance in alfalfa at least partially by reprogramming ethylene and PA biosynthesis, attributable to the increased PAs and decreased ethylene levels, which leads to more enhanced membrane stability and photosynthesis as well as less leaf senescence caused by ethylene.
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Affiliation(s)
| | | | | | | | | | - Longxing Hu
- Department of Pratacultural Sciences, College of Agriculture, Hunan Agricultural University, Changsha, China
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257
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γ-Aminobutyric Acid Promotes Chloroplast Ultrastructure, Antioxidant Capacity, and Growth of Waterlogged Maize Seedlings. Sci Rep 2019; 9:484. [PMID: 30679455 PMCID: PMC6345989 DOI: 10.1038/s41598-018-36334-y] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2018] [Accepted: 11/13/2018] [Indexed: 02/06/2023] Open
Abstract
γ-aminobutyric acid (GABA) is a small signaling molecule that accumulates rapidly in plants exposed to various stresses; however, it has not been applied in regulating waterlogging tolerance in maize seedlings. Here, the effect of exogenous application of GABA in the determined optimal concentration was performed on seedlings of two maize cultivars under waterlogging treatments initiated at 3-leaf (V3) and 5-leaf stages (V5) in repeated experiments in 2016 and 2017. Chloroplast ultrastructure, photosynthesis, antioxidant capacity, and reactive oxygen species (ROS) production in the leaves were examined and compared with the corresponding values under normal soil water treatment (CK) and waterlogging treatment (WL). Compared with WL treatment, application of GABA significantly increased aboveground and root dry matter by 19.0% and 61.0%, promoted photosynthetic rate and chlorophyll content by 19.8% and 36.0%, increased the number of grana per chloroplast by 36.0%, fortified antioxidants (SOD, POD, CAT, GR, APX, VC) activities by 14.7-42.7%, and reduced the content of MDA, H2O2, and O2- by 30.5%, 32.5%, and 21.8%, respectively (p < 0.05). Collectively, GABA application was shown to promote the growth of maize seedlings under waterlogging, by down regulating ROIs-producing enzymes, activating antioxidant defense systems, and improving chloroplast ultrastructure and photosynthetic traits.
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258
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Phytohormone-Mediated Stomatal Response, Escape and Quiescence Strategies in Plants under Flooding Stress. AGRONOMY-BASEL 2019. [DOI: 10.3390/agronomy9020043] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Generally, flooding causes waterlogging or submergence stress which is considered as one of the most important abiotic factors that severely hinders plant growth and development. Plants might not complete their life cycle even in short duration of flooding. As biologically intelligent organisms, plants always try to resist or survive under such adverse circumstances by adapting a wide array of mechanisms including hormonal homeostasis. Under this mechanism, plants try to adapt through diverse morphological, physiological and molecular changes, including the closing of stomata, elongating of petioles, hollow stems or internodes, or maintaining minimum physiological activity to store energy to combat post-flooding stress and to continue normal growth and development. Mainly, ethylene, gibberellins (GA) and abscisic acid (ABA) are directly and/or indirectly involved in hormonal homeostasis mechanisms. Responses of specific genes or transcription factors or reactive oxygen species (ROS) maintain the equilibrium between stomatal opening and closing, which is one of the fastest responses in plants when encountering flooding stress conditions. In this review paper, the sequential steps of some of the hormone-dependent survival mechanisms of plants under flooding stress conditions have been critically discussed.
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259
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Zhang Q, Liu X, Zhang Z, Liu N, Li D, Hu L. Melatonin Improved Waterlogging Tolerance in Alfalfa ( Medicago sativa) by Reprogramming Polyamine and Ethylene Metabolism. FRONTIERS IN PLANT SCIENCE 2019. [PMID: 30774639 DOI: 10.3389/fpls.2016.044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
Melatonin (MT), polyamines (PAs), and ethylene have been suggested to play key roles in plant growth and development in response to environmental abiotic stresses. However, the effect of melatonin on polyamine and ethylene metabolism under waterlogging stress has rarely been elucidated. The main purpose of this study was to investigate the effect of melatonin pretreatment on waterlogging stress in alfalfa. The experiment was arranged into four treatment groups control with water pretreatment (CK-MT), control with melatonin pretreatment (CK+MT), waterlogging pretreated with water (WL-MT) and waterlogging pretreated with melatonin (WL+MT), with three replications. Six-week-old alfalfa seedlings were pretreated with 100 μM melatonin and exposed to waterlogging stress for 10 days. Plant growth rate, different physiological characteristics, and gene expression level were measured. Results showed that waterlogging induced melatonin accumulation, and melatonin pretreatment increased endogenous MT levels for the control and water-logged plants. Waterlogging stress caused a significant reduction in plant growth, chlorophyll content, photochemical efficiency (Fv/Fm) and net photosynthetic rate (Pn), while also causing increased leaf electrolyte leakage (EL) and malondialdehyde (MDA) content. Pretreatment with melatonin alleviated the waterlogging-induced damage and reduction in plant growth, chlorophyll content, Fv/Fm and Pn. Waterlogging stress significantly increased leaf polyamines (Put, Spd, Spm) and ethylene levels, and the increased PAs and ethylene levels are coupled with higher metabolic enzymes and gene expressions. While pretreatment with melatonin further increased Put, Spd and Spm levels, it also decreased ethylene levels under waterlogging, and those increased PAs levels or decreased ethylene levels are regulated by the metabolic enzymes and gene expressions. The results in this study provide more comprehensive insight into the physiological and molecular mechanisms of melatonin-improved waterlogging tolerance in alfalfa. Furthermore, they suggested that melatonin improved waterlogging tolerance in alfalfa at least partially by reprogramming ethylene and PA biosynthesis, attributable to the increased PAs and decreased ethylene levels, which leads to more enhanced membrane stability and photosynthesis as well as less leaf senescence caused by ethylene.
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Affiliation(s)
- Qiang Zhang
- Department of Pratacultural Sciences, College of Agriculture, Hunan Agricultural University, Changsha, China
| | - Xiaofei Liu
- Department of Pratacultural Sciences, College of Agriculture, Hunan Agricultural University, Changsha, China
| | - Zhifei Zhang
- Department of Pratacultural Sciences, College of Agriculture, Hunan Agricultural University, Changsha, China
| | - Ningfang Liu
- Department of Pratacultural Sciences, College of Agriculture, Hunan Agricultural University, Changsha, China
| | - Danzhu Li
- Department of Pratacultural Sciences, College of Agriculture, Hunan Agricultural University, Changsha, China
| | - Longxing Hu
- Department of Pratacultural Sciences, College of Agriculture, Hunan Agricultural University, Changsha, China
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260
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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: 39] [Impact Index Per Article: 7.8] [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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261
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Yamauchi T, Abe F, Tsutsumi N, Nakazono M. Root Cortex Provides a Venue for Gas-Space Formation and Is Essential for Plant Adaptation to Waterlogging. FRONTIERS IN PLANT SCIENCE 2019; 10:259. [PMID: 31024577 PMCID: PMC6465681 DOI: 10.3389/fpls.2019.00259] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2018] [Accepted: 02/18/2019] [Indexed: 05/20/2023]
Abstract
Lysigenous aerenchyma, which develops by death and subsequent lysis of the cortical cells in roots, is essential for internal long-distance oxygen transport from shoot base to root tips of plants in waterlogged soil. Although many studies focus on the amounts of aerenchyma in roots, significance of the size of the root cortex in which aerenchyma forms has received less research attention. In the present study, we evaluated the cross-sectional area of each root tissue in adventitious roots of upland crops, wheat (Triticum aestivum) and maize (Zea mays ssp. mays), and the wetland crop, rice (Oryza sativa) under aerated or stagnant deoxygenated conditions; the latter can mimic the changes in gas composition in waterlogged soils. Our analyses revealed that the areas of whole root and cortex of the three species increased under stagnant conditions. In rice roots, cortex to stele ratio (CSR) and aerenchyma to cortex ratio (ACR), which is associated with the areas of gas spaces, were much higher than those in wheat and maize roots, suggesting that these anatomical features are essential for a high capacity for oxygen transport along roots. To test this hypothesis, rates of radial oxygen loss (ROL), which is the diffusive flux of oxygen from within a root to the external medium, from thick and thin adventitious roots of rice were measured using a cylindrical (root-sleeving) oxygen electrode, for plants with shoots in air and roots in an oxygen-free medium. As expected, the rate of ROL from thick roots, which have larger cortex and aerenchyma areas, was higher than that of thin roots. The rate of ROL was highest at the apical part of rice roots, where aerenchyma was hardly detected, but at which cuboidal cell arrangement in the cortex provides tissue porosity. We conclude that high CSR in combination with large root diameter is a feature which promotes oxygen transport from shoot base to root tips of plants. Moreover, we propose that CSR should be a useful quantitative index for the evaluation and improvement of root traits contributing to tolerance of crops to soil waterlogging.
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Affiliation(s)
- Takaki Yamauchi
- Japan Science and Technology Agency, PRESTO, Kawaguchi, Japan
- Graduate School of Agricultural and Life Sciences, University of Tokyo, Tokyo, Japan
- *Correspondence: Takaki Yamauchi,
| | | | - Nobuhiro Tsutsumi
- Graduate School of Agricultural and Life Sciences, University of Tokyo, Tokyo, Japan
| | - Mikio Nakazono
- Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, Japan
- UWA School of Agriculture and Environment, The University of Western Australia, Crawley, WA, Australia
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262
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Jian Z, Ma F, Guo Q, Qin A, Xiao W. Long-term responses of riparian plants' composition to water level fluctuation in China's Three Gorges Reservoir. PLoS One 2018; 13:e0207689. [PMID: 30485328 PMCID: PMC6261589 DOI: 10.1371/journal.pone.0207689] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2018] [Accepted: 11/04/2018] [Indexed: 01/05/2023] Open
Abstract
The water level fluctuation zone (WLFZ) has experienced a novel hydrological regime due to the anti-seasonal operation of China’s Three Gorges Reservoir. Overall, hydrological change can significantly influence the riparian environment and shift the riparian vegetation. Although numerous studies have investigated the short-term responses of riparian plants to water level fluctuation in this zone, few have addressed long-term effects. In this study, four permanent plots in the WLFZ of the canyon landform area were chosen to evaluate the long-term responses of riparian plants to water level fluctuation from 2008 to 2015 and to screen candidate plants for ecological restoration. We recorded 146 species in 2008, 110 species in 2009, 68 species in 2012 and 69 species in 2015, indicating a conspicuous loss in riparian plants. Most of the remnant plants were annual and perennial herbs. Of the native species present in 2008, 82, 22 and 8 had disappeared in 2009, 2012 and 2015, respectively. Simultaneously, 45, 15 and 11 non-native species were first found, respectively. Additionally, over half of the native and the non-native species were not found after being subjected to a water level fluctuation. From 2008 to 2015, only 27 native species always presented; however, not all of them were chosen as candidates for ecological restoration because of their decreased importance values. In contrast, the importance value of Cynodon dactylon increased over time, suggesting its high tolerance to long-term winter flooding. We concluded that riparian plants’ composition of the canyon landform area dramatically declined after long-term water level fluctuation and their presence was determined by the novel hydrological condition. Our results also suggested that Cynodon dactylon or its combination with other species (i.e. Digitaria chrysoblephara, Setaria glauca, Setaria viridis) is a better candidate for ecological restoration in the WLFZ.
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Affiliation(s)
- Zunji Jian
- Key Laboratory of Forest Ecology and Environment of State Forestry Administration, Research Institute of Forest Ecology, Environment and Protection, Chinese Academy of Forestry, Haidian, Beijing, PR China
- * E-mail: (ZJ); (QG)
| | - Fanqiang Ma
- Key Laboratory of Forest Ecology and Environment of State Forestry Administration, Research Institute of Forest Ecology, Environment and Protection, Chinese Academy of Forestry, Haidian, Beijing, PR China
| | - Quanshui Guo
- Key Laboratory of Forest Ecology and Environment of State Forestry Administration, Research Institute of Forest Ecology, Environment and Protection, Chinese Academy of Forestry, Haidian, Beijing, PR China
- * E-mail: (ZJ); (QG)
| | - Aili Qin
- Key Laboratory of Forest Ecology and Environment of State Forestry Administration, Research Institute of Forest Ecology, Environment and Protection, Chinese Academy of Forestry, Haidian, Beijing, PR China
| | - Wenfa Xiao
- Key Laboratory of Forest Ecology and Environment of State Forestry Administration, Research Institute of Forest Ecology, Environment and Protection, Chinese Academy of Forestry, Haidian, Beijing, PR China
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263
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Takenaka S, Yamamoto R, Nakamura C. Genetic diversity of submergence stress response in cytoplasms of the Triticum-Aegilops complex. Sci Rep 2018; 8:16267. [PMID: 30390041 PMCID: PMC6214928 DOI: 10.1038/s41598-018-34682-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2018] [Accepted: 10/23/2018] [Indexed: 12/21/2022] Open
Abstract
Genetic diversity in cytoplasmic and nuclear genomes and their interaction affecting adaptive traits is an attractive research subject in plants. We addressed submergence stress response of wheat that has become increasingly important but remained largely uninvestigated. Our primary aim was to disclose cytoplasmic diversity using nucleus-cytoplasm (NC) hybrids possessing a series of heterologous cytoplasms in a common nuclear background. Effects of submergence on seedling emergence and growth from imbibed seeds were studied and compared with euplasmic lines. Marked phenotypic variabilities were observed among both lines, demonstrating divergent cytoplasmic and nuclear effects on submergence response. NC hybrids with cytoplasm of Aegilops mutica showed a less inhibition, indicative of their positive contribution to submergence tolerance, whereas cytoplasms of Aegilops umbellulata and related species caused a greater inhibition. Superoxide dismutase (SOD) activity showed a marked increase accompanied by retardation of seedling growth in a susceptible NC hybrid. The observation suggested that the elevated SOD activity was resulted from a high level of reactive oxygen species accumulated and remained in susceptible seedlings. Taken together, our results point to the usefulness of NC hybrids in further studies needed to clarify molecular mechanisms underlying the nucleus-cytoplasm interaction regulating submergence stress response in wheat.
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Affiliation(s)
- Shotaro Takenaka
- Department of Plant Life Science, Faculty of Agriculture, Ryukoku University, 1-5 Yokotani, Ohe-cho, Seta, Otsu, 520-2194, Japan
| | - Ryohei Yamamoto
- Department of Plant Life Science, Faculty of Agriculture, Ryukoku University, 1-5 Yokotani, Ohe-cho, Seta, Otsu, 520-2194, Japan
| | - Chiharu Nakamura
- Department of Plant Life Science, Faculty of Agriculture, Ryukoku University, 1-5 Yokotani, Ohe-cho, Seta, Otsu, 520-2194, Japan.
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264
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Trade-offs and Synergies in the Structural and Functional Characteristics of Leaves Photosynthesizing in Aquatic Environments. ACTA ACUST UNITED AC 2018. [DOI: 10.1007/978-3-319-93594-2_11] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/09/2023]
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265
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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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266
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Kuroha T, Nagai K, Gamuyao R, Wang DR, Furuta T, Nakamori M, Kitaoka T, Adachi K, Minami A, Mori Y, Mashiguchi K, Seto Y, Yamaguchi S, Kojima M, Sakakibara H, Wu J, Ebana K, Mitsuda N, Ohme-Takagi M, Yanagisawa S, Yamasaki M, Yokoyama R, Nishitani K, Mochizuki T, Tamiya G, McCouch SR, Ashikari M. Ethylene-gibberellin signaling underlies adaptation of rice to periodic flooding. Science 2018; 361:181-186. [PMID: 30002253 DOI: 10.1126/science.aat1577] [Citation(s) in RCA: 140] [Impact Index Per Article: 23.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2018] [Accepted: 05/18/2018] [Indexed: 01/19/2023]
Abstract
Most plants do poorly when flooded. Certain rice varieties, known as deepwater rice, survive periodic flooding and consequent oxygen deficiency by activating internode growth of stems to keep above the water. Here, we identify the gibberellin biosynthesis gene, SD1 (SEMIDWARF1), whose loss-of-function allele catapulted the rice Green Revolution, as being responsible for submergence-induced internode elongation. When submerged, plants carrying the deepwater rice-specific SD1 haplotype amplify a signaling relay in which the SD1 gene is transcriptionally activated by an ethylene-responsive transcription factor, OsEIL1a. The SD1 protein directs increased synthesis of gibberellins, largely GA4, which promote internode elongation. Evolutionary analysis shows that the deepwater rice-specific haplotype was derived from standing variation in wild rice and selected for deepwater rice cultivation in Bangladesh.
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Affiliation(s)
- Takeshi Kuroha
- Graduate School of Life Sciences, Tohoku University, Miyagi 890-8577, Japan.
| | - Keisuke Nagai
- Bioscience and Biotechnology Center, Nagoya University, Aichi 464-8601, Japan
| | - Rico Gamuyao
- Bioscience and Biotechnology Center, Nagoya University, Aichi 464-8601, Japan
| | - Diane R Wang
- Plant Breeding and Genetics, Cornell University, Ithaca, NY 14853, USA
| | - Tomoyuki Furuta
- Bioscience and Biotechnology Center, Nagoya University, Aichi 464-8601, Japan
| | - Masanari Nakamori
- Bioscience and Biotechnology Center, Nagoya University, Aichi 464-8601, Japan
| | - Takuya Kitaoka
- Bioscience and Biotechnology Center, Nagoya University, Aichi 464-8601, Japan
| | - Keita Adachi
- Bioscience and Biotechnology Center, Nagoya University, Aichi 464-8601, Japan
| | - Anzu Minami
- Bioscience and Biotechnology Center, Nagoya University, Aichi 464-8601, Japan
| | - Yoshinao Mori
- Bioscience and Biotechnology Center, Nagoya University, Aichi 464-8601, Japan
| | - Kiyoshi Mashiguchi
- Graduate School of Life Sciences, Tohoku University, Miyagi 890-8577, Japan
| | - Yoshiya Seto
- Graduate School of Life Sciences, Tohoku University, Miyagi 890-8577, Japan
| | - Shinjiro Yamaguchi
- Graduate School of Life Sciences, Tohoku University, Miyagi 890-8577, Japan
| | - Mikiko Kojima
- RIKEN Center for Sustainable Resource Science, Kanagawa 230-0045, Japan
| | - Hitoshi Sakakibara
- RIKEN Center for Sustainable Resource Science, Kanagawa 230-0045, Japan.,Graduate School of Bioagricultural Sciences, Nagoya University, Aichi 464-8601, Japan
| | - Jianzhong Wu
- Institute of Crop Science, NARO, Ibaraki 305-8518, Japan
| | - Kaworu Ebana
- Genetic Resources Center, NARO, Ibaraki 305-8518, Japan
| | | | - Masaru Ohme-Takagi
- Bioproduction Research Institute, AIST, Ibaraki 305-8566, Japan.,Graduate School of Science and Engineering, Saitama University, Saitama 338-8570, Japan
| | - Shuichi Yanagisawa
- Biotechnology Research Center, The University of Tokyo, Tokyo 113-8657, Japan
| | - Masanori Yamasaki
- Graduate School of Agricultural Science, Kobe University, Hyogo 675-2103, Japan
| | - Ryusuke Yokoyama
- Graduate School of Life Sciences, Tohoku University, Miyagi 890-8577, Japan
| | - Kazuhiko Nishitani
- Graduate School of Life Sciences, Tohoku University, Miyagi 890-8577, Japan
| | | | - Gen Tamiya
- Tohoku Medical Megabank Organization, Tohoku University, Miyagi 980-8575, Japan.,RIKEN Center for Advanced Intelligence Project, Tokyo 103-0027, Japan
| | - Susan R McCouch
- Plant Breeding and Genetics, Cornell University, Ithaca, NY 14853, USA.
| | - Motoyuki Ashikari
- Bioscience and Biotechnology Center, Nagoya University, Aichi 464-8601, Japan.
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267
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Proteomic Analysis of Rapeseed Root Response to Waterlogging Stress. PLANTS 2018; 7:plants7030071. [PMID: 30205432 PMCID: PMC6160990 DOI: 10.3390/plants7030071] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/06/2018] [Revised: 08/29/2018] [Accepted: 08/30/2018] [Indexed: 01/03/2023]
Abstract
The overall health of a plant is constantly affected by the changing and hostile environment. Due to climate change and the farming pattern of rice (Oryza sativa) and rapeseed (Brassica napus L.), stress from waterlogging poses a serious threat to productivity assurance and the yield of rapeseed in China's Yangtze River basin. In order to improve our understanding of the complex mechanisms behind waterlogging stress and identify waterlogging-responsive proteins, we firstly conducted iTRAQ (isobaric tags for relative and absolute quantification)-based quantitative proteomic analysis of rapeseed roots under waterlogging treatments, for both a tolerant cultivar ZS9 and sensitive cultivar GH01. A total of 7736 proteins were identified by iTRAQ, of which several hundred showed different expression levels, including 233, 365, and 326 after waterlogging stress for 4H, 8H, and 12H in ZS9, respectively, and 143, 175, and 374 after waterlogging stress for 4H, 8H, and 12H in GH01, respectively. For proteins repeatedly identified at different time points, gene ontology (GO) cluster analysis suggested that the responsive proteins of the two cultivars were both enriched in the biological process of DNA-dependent transcription and the oxidation⁻reduction process, and response to various stress and hormone stimulus, while different distribution frequencies in the two cultivars was investigated. Moreover, overlap proteins with similar or opposite tendencies of fold change between ZS9 and GH01 were observed and clustered based on the different expression ratios, suggesting the two genotype cultivars exhibited diversiform molecular mechanisms or regulation pathways in their waterlogging stress response. The following qRT-PCR (quantitative real-time polymerase chain reaction) results verified the candidate proteins at transcription levels, which were prepared for further research. In conclusion, proteins detected in this study might perform different functions in waterlogging responses and would provide information conducive to better understanding adaptive mechanisms under environmental stresses.
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268
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Hu LY, Li D, Sun K, Cao W, Fu WQ, Zhang W, Dai CC. Mutualistic fungus Phomopsis liquidambari increases root aerenchyma formation through auxin-mediated ethylene accumulation in rice (Oryza sativa L.). PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2018; 130:367-376. [PMID: 30055345 DOI: 10.1016/j.plaphy.2018.07.018] [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: 05/21/2018] [Accepted: 07/17/2018] [Indexed: 06/08/2023]
Abstract
The fungal endophyte Phomopsis liquidambari can improve nitrification rates and alter the abundance and composition of ammonia-oxidizers in the soil rhizosphere of rice. Aerenchyma is related to oxygen transport efficiency and contributes to the enhanced rhizospheric nitrification under flooding conditions. However, whether and how P. liquidambari affects aerenchyma formation is largely unknown. We therefore conducted pot and hydroponic experiments to investigate the changes of aerenchyma area, ethylene and indole-3-acetic acid (IAA) levels in rice with or without P. liquidambari infection. Our results showed that the larger aerenchyma area in rice roots with P. liquidambari inoculation was associated with markedly up-regulated expression of genes related to aerenchyma formation. Meanwhile, P. liquidambari inoculation substantially elevated root porosity (POR) and radial oxygen loss (ROL), leading to the enhancement of oxidation-reduction potential (ORP) under pot condition. Besides, P. liquidambari significantly increased IAA and ethylene levels in rice by stimulating the expression of genes involved in auxin and ethylene biosyntheses. Furthermore, auxin that partly acting upstream of ethylene signalling played an essential role in P. liquidambari-promoted aerenchyma formation. These results verified the direct contribution of P. liquidambari in promoting aerenchyma formation via the accumulation of IAA and ethylene in rice roots, which provides a constructive suggestion for improving hypoxia tolerance through plant-endophyte interactions.
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Affiliation(s)
- Li-Yan Hu
- Jiangsu Key Laboratory for Microbes and Functional Genomics, Jiangsu Engineering and Technology Research Center for Industrialization of Microbial Resources, College of Life Sciences, Nanjing Normal University, Nanjing, Jiangsu Province, 210023, China
| | - Dan Li
- Jiangsu Key Laboratory for Microbes and Functional Genomics, Jiangsu Engineering and Technology Research Center for Industrialization of Microbial Resources, College of Life Sciences, Nanjing Normal University, Nanjing, Jiangsu Province, 210023, China
| | - Kai Sun
- Jiangsu Key Laboratory for Microbes and Functional Genomics, Jiangsu Engineering and Technology Research Center for Industrialization of Microbial Resources, College of Life Sciences, Nanjing Normal University, Nanjing, Jiangsu Province, 210023, China
| | - Wei Cao
- Jiangsu Key Laboratory for Microbes and Functional Genomics, Jiangsu Engineering and Technology Research Center for Industrialization of Microbial Resources, College of Life Sciences, Nanjing Normal University, Nanjing, Jiangsu Province, 210023, China
| | - Wan-Qiu Fu
- Jiangsu Key Laboratory for Microbes and Functional Genomics, Jiangsu Engineering and Technology Research Center for Industrialization of Microbial Resources, College of Life Sciences, Nanjing Normal University, Nanjing, Jiangsu Province, 210023, China
| | - Wei Zhang
- Jiangsu Key Laboratory for Microbes and Functional Genomics, Jiangsu Engineering and Technology Research Center for Industrialization of Microbial Resources, College of Life Sciences, Nanjing Normal University, Nanjing, Jiangsu Province, 210023, China
| | - Chuan-Chao Dai
- Jiangsu Key Laboratory for Microbes and Functional Genomics, Jiangsu Engineering and Technology Research Center for Industrialization of Microbial Resources, College of Life Sciences, Nanjing Normal University, Nanjing, Jiangsu Province, 210023, China.
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269
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Ye H, Song L, Chen H, Valliyodan B, Cheng P, Ali L, Vuong T, Wu C, Orlowski J, Buckley B, Chen P, Shannon JG, Nguyen HT. A major natural genetic variation associated with root system architecture and plasticity improves waterlogging tolerance and yield in soybean. PLANT, CELL & ENVIRONMENT 2018; 41:2169-2182. [PMID: 29520811 DOI: 10.1111/pce.13190] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2017] [Revised: 03/02/2018] [Accepted: 03/05/2018] [Indexed: 12/17/2023]
Abstract
Natural genetic variations in waterlogging tolerance are controlled by multiple genes mapped as quantitative trait loci (QTLs) in major crops, including soybean (Glycine max L.). In this research, 2 novel QTLs associated with waterlogging tolerance were mapped from an elite/exotic soybean cross. The subsequent research was focused on a major QTL (qWT_Gm03) with the tolerant allele from the exotic parent. This QTL was isolated into near-isogenic backgrounds, and its effects on waterlogging tolerance were validated in multiple environments. Fine mapping narrowed qWT_Gm03 into a genomic region of <380 Kbp excluding Rps1 gene for Phytophthora sojae resistance. The tolerant allele of qWT_Gm03 promotes root growth under nonstress conditions and favourable root plasticity under waterlogging, resulting in improved waterlogging tolerance, yield, and drought tolerance-related traits, possibly through more efficient water/nutrient uptakes. Meanwhile, involvement of auxin pathways was also identified in the regulation of waterlogging tolerance, as the genotypic differences of qWT_Gm03 in waterlogging tolerance and formation of adventitious/aerial roots can be complemented by an exogenous auxin-biosynthesis inhibitor. These findings provided genetic resources to address the urgent demand of improving waterlogging tolerance in soybean and revealed the determinant roles of root architecture and plasticity in the plant adaptation to waterlogging.
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Affiliation(s)
- Heng Ye
- Division of Plant Sciences, University of Missouri, Columbia, MO, 65211, USA
| | - Li Song
- Division of Plant Sciences, University of Missouri, Columbia, MO, 65211, USA
- Institutes of Agricultural Science and Technology Development, Yangzhou University, Yangzhou, 225009, China
| | - Huatao Chen
- Division of Plant Sciences, University of Missouri, Columbia, MO, 65211, USA
- Institute of Industrial Crops, Jiangsu Academy of Agricultural Sciences, Nanjing, 210014, China
| | - Babu Valliyodan
- Division of Plant Sciences, University of Missouri, Columbia, MO, 65211, USA
| | - Peng Cheng
- Division of Plant Sciences, University of Missouri, Columbia, MO, 65211, USA
| | - Liakat Ali
- Division of Plant Sciences, University of Missouri Fisher Delta Research Center, Portageville, MO, 63873, USA
| | - Tri Vuong
- Division of Plant Sciences, University of Missouri, Columbia, MO, 65211, USA
| | - Chengjun Wu
- Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, AR, 72701, USA
| | - John Orlowski
- Delta Research and Extension Center, Department of Plant and Soil Sciences, Mississippi State University, Stoneville, MS, 38776, USA
| | - Blair Buckley
- Red River Research Station, Louisiana State University Agricultural Center, Baton Rouge, LA, 70803, USA
| | - Pengyin Chen
- Division of Plant Sciences, University of Missouri Fisher Delta Research Center, Portageville, MO, 63873, USA
- Department of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, AR, 72701, USA
| | - J Grover Shannon
- Division of Plant Sciences, University of Missouri Fisher Delta Research Center, Portageville, MO, 63873, USA
| | - Henry T Nguyen
- Division of Plant Sciences, University of Missouri, Columbia, MO, 65211, USA
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270
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Miricescu A, Goslin K, Graciet E. Ubiquitylation in plants: signaling hub for the integration of environmental signals. JOURNAL OF EXPERIMENTAL BOTANY 2018; 69:4511-4527. [PMID: 29726957 DOI: 10.1093/jxb/ery165] [Citation(s) in RCA: 54] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2018] [Accepted: 04/27/2018] [Indexed: 05/20/2023]
Abstract
A fundamental question in biology is how organisms integrate the plethora of environmental cues that they perceive to trigger a co-ordinated response. The regulation of protein stability, which is largely mediated by the ubiquitin-proteasome system in eukaryotes, plays a pivotal role in these processes. Due to their sessile lifestyle and the need to respond rapidly to a multitude of environmental factors, plants are thought to be especially dependent on proteolysis to regulate cellular processes. In this review, we present the complexity of the ubiquitin system in plants, and discuss the relevance of the proteolytic and non-proteolytic roles of this system in the regulation and co-ordination of plant responses to environmental signals. We also discuss the role of the ubiquitin system as a key regulator of plant signaling pathways. We focus more specifically on the functions of E3 ligases as regulators of the jasmonic acid (JA), salicylic acid (SA), and ethylene hormone signaling pathways that play important roles to mount a co-ordinated response to multiple environmental stresses. We also provide examples of new players in this field that appear to integrate different cues and signaling pathways.
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Affiliation(s)
- Alexandra Miricescu
- Department of Biology, National University of Ireland Maynooth, Maynooth, Ireland
| | - Kevin Goslin
- Department of Biology, National University of Ireland Maynooth, Maynooth, Ireland
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271
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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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272
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Tan X, Xu H, Khan S, Equiza MA, Lee SH, Vaziriyeganeh M, Zwiazek JJ. Plant water transport and aquaporins in oxygen-deprived environments. JOURNAL OF PLANT PHYSIOLOGY 2018; 227:20-30. [PMID: 29779706 DOI: 10.1016/j.jplph.2018.05.003] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2017] [Revised: 05/01/2018] [Accepted: 05/02/2018] [Indexed: 06/08/2023]
Abstract
Oxygen deprivation commonly affects plants exposed to flooding and soil compaction. The resulting root hypoxia has an immediate effect on plant water relations and upsets water balance. Hypoxia inhibits root water transport and triggers stomatal closure. The processes contributing to the inhibition of root hydraulic conductivity and conductance (hydraulic conductivity of the whole root system) are complex and involve changes in root morphology and the functions of aquaporins. Aquaporins (AQPs) comprise a group of membrane intrinsic proteins that are responsible for the transport of water, as well as some small neutral solutes and ions. They respond to a wide range of environmental stresses including O2 deprivation, but the underlying functional mechanisms are still elusive. The aquaporin-mediated water transport is affected by the acidification of the cytoplasm and depletion of ATP that is required for aquaporin phosphorylation and membrane functions. Cytoplasmic pH, phosphorylation, and intracellular Ca2+ concentration directly control AQP gating, all of which are related to O2 deprivation. This review addresses the structural determinants that are essential for pore conformational changes in AQPs, to highlight the underlying mechanisms triggered by O2 deprivation stress. Gene expression of AQPs is modified in hypoxic plants, which may constitute an important, yet little explored, mechanism of hypoxia tolerance. In addition to water transport, AQPs may contribute to hypoxia tolerance by transporting O2, H2O2, and lactic acid. Responses of plants to O2 deprivation, and especially those that contribute to maintenance of water transport, are highly complex and entail the signals originating in roots and shoots that lead to and follow the stomatal closure. These complex responses may involve ethylene, abscisic acid, and possibly other hormonal factors and signaling molecules in ways that remain to be elucidated.
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Affiliation(s)
- Xiangfeng Tan
- Department of Renewable Resources, University of Alberta, 442 Earth Sciences Bldg., Edmonton, AB, T6G 2E3, Canada
| | - Hao Xu
- Agriculture and Agri-Food Canada, Summerland Research and Development Centre, Summerland, BC, V0H 1Z0, Canada
| | - Shanjida Khan
- Department of Renewable Resources, University of Alberta, 442 Earth Sciences Bldg., Edmonton, AB, T6G 2E3, Canada
| | - Maria A Equiza
- Department of Renewable Resources, University of Alberta, 442 Earth Sciences Bldg., Edmonton, AB, T6G 2E3, Canada
| | - Seong H Lee
- Department of Renewable Resources, University of Alberta, 442 Earth Sciences Bldg., Edmonton, AB, T6G 2E3, Canada
| | - Maryamsadat Vaziriyeganeh
- Department of Renewable Resources, University of Alberta, 442 Earth Sciences Bldg., Edmonton, AB, T6G 2E3, Canada
| | - Janusz J Zwiazek
- Department of Renewable Resources, University of Alberta, 442 Earth Sciences Bldg., Edmonton, AB, T6G 2E3, Canada.
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273
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Liu K, Li Y, Chen X, Li L, Liu K, Zhao H, Wang Y, Han S. ERF72 interacts with ARF6 and BZR1 to regulate hypocotyl elongation in Arabidopsis. JOURNAL OF EXPERIMENTAL BOTANY 2018; 69:3933-3947. [PMID: 29897568 PMCID: PMC6054149 DOI: 10.1093/jxb/ery220] [Citation(s) in RCA: 49] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2017] [Accepted: 06/18/2018] [Indexed: 05/21/2023]
Abstract
The phytohormones brassinosteroid (BR), auxin, and gibberellin (GA) regulate photomorphogenesis-related hypocotyl elongation in Arabidopsis via the co-operative interaction of BZR-ARF-PIF/DELLA (BAP/D) transcription factors/regulators. In addition, ethylene activates the PIF3 or ERF1 pathway through EIN3/EIL1 to balance hypocotyl elongation in Arabidopsis seedlings. However, the mechanism by which ethylene is co-ordinated with other phytohormones to produce light-regulated hypocotyl growth remains elusive. In this study, we found that hypocotyl cell elongation is regulated by a network involving ethylene, auxin, and BR signalling, which is mediated by interactions among ERF72, ARF6, and BZR1. ERF72 interacted directly with ARF6 and BZR1 in vitro and in vivo, and it antagonised regulation by ARF6 and BZR1 of the transcription of BEE3 and XTH7. In addition, light modulated the subcellular localisation of ERF72 and transcription of ERF72 through the EIN2-EIN3/EIL1 pathway, facilitating the function of ERF72 in photomorphogenesis. The expression of BEE3 and XTH7 was also regulated by the EIN2-EIN3/EIL1 pathway. Our findings indicate that a revised BZR-ARF-PIF/DELLA-ERF (BAP/DE) module integrates light and hormone signals to regulate hypocotyl elongation in Arabidopsis.
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Affiliation(s)
- Kun Liu
- Beijing Key Laboratory of Gene Resource and Molecular Development, College of Life Sciences, Beijing Normal University, Beijing, China
| | - Yihao Li
- Beijing Key Laboratory of Gene Resource and Molecular Development, College of Life Sciences, Beijing Normal University, Beijing, China
| | - Xuena Chen
- Beijing Key Laboratory of Gene Resource and Molecular Development, College of Life Sciences, Beijing Normal University, Beijing, China
| | - Lijuan Li
- Beijing Key Laboratory of Gene Resource and Molecular Development, College of Life Sciences, Beijing Normal University, Beijing, China
| | - Kai Liu
- Beijing Key Laboratory of Gene Resource and Molecular Development, College of Life Sciences, Beijing Normal University, Beijing, China
| | - Heping Zhao
- Beijing Key Laboratory of Gene Resource and Molecular Development, College of Life Sciences, Beijing Normal University, Beijing, China
| | - Yingdian Wang
- Beijing Key Laboratory of Gene Resource and Molecular Development, College of Life Sciences, Beijing Normal University, Beijing, China
- Correspondence: or
| | - Shengcheng Han
- Beijing Key Laboratory of Gene Resource and Molecular Development, College of Life Sciences, Beijing Normal University, Beijing, China
- Correspondence: or
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274
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Vishwakarma A, Kumari A, Mur LAJ, Gupta KJ. A discrete role for alternative oxidase under hypoxia to increase nitric oxide and drive energy production. Free Radic Biol Med 2018; 122:40-51. [PMID: 29604396 DOI: 10.1016/j.freeradbiomed.2018.03.045] [Citation(s) in RCA: 53] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/15/2017] [Revised: 03/22/2018] [Accepted: 03/26/2018] [Indexed: 11/27/2022]
Abstract
Alternative oxidase (AOX) is an integral part of the mitochondrial electron transport and can prevent reactive oxygen species (ROS) and nitric oxide (NO) production under non-stressed, normoxic conditions. Here we assessed the roles of AOX by imposing stress under normoxia in comparison to hypoxic conditions using AOX over expressing (AOX OE) and anti-sense (AOX AS) transgenic Arabidopsis seedlings and roots. Under normoxic conditions stress was induced with the defence elicitor flagellin (flg22). AOX OE reduced NO production whilst this was increased in AOX AS. Moreover AOX AS also exhibited an increase in superoxide and therefore peroxynitrite, tyrosine nitration suggesting that scavenging of NO by AOX can prevent toxic peroxynitrite formation under normoxia. In contrast, during hypoxia interestingly we found that AOX is a generator of NO. Thus, the NO produced during hypoxia, was enhanced in AOX OE and suppressed in AOX AS. Additionally, treatment of WT or AOX OE with the AOX inhibitor SHAM inhibited hypoxic NO production. The enhanced levels of NO correlated with expression of non-symbiotic haemoglobin, increased NR activity and ATP production. The ATP generation was suppressed in nia1,2 mutant and non symbiotic haemoglobin antisense line treated with SHAM. Taken together these results suggest that hypoxic NO generation mediated by AOX has a discrete role by feeding into the haemoglobin-NO cycle to drive energy efficiency under conditions of low oxygen tension.
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Affiliation(s)
| | - Aprajita Kumari
- National Institute of Plant Genome Research, Aruna Asaf Ali Marg, 110067 New Delhi, India
| | - Luis A J Mur
- Institute of Environmental and Rural Science, Aberystwyth University, Edward Llwyd Building, Aberystwyth SY23 3DA, UK
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275
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Saptiningsih E, Dewi K, Santosa S, Purwestri YA. Clonal integration of the invasive plant Wedelia trilobata (L.) Hitch in stress of flooding type combination. INTERNATIONAL JOURNAL OF PLANT BIOLOGY 2018. [DOI: 10.4081/pb.2018.7526] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
The clonal invasion of Wedelia trilobata (L.) Hitch has spread to edges of mangrove areas, which leads to the formation of flooding-stressed areas such as waterlogged and submergence. This study purpose to investigate the clonal integration mechanism of W. trilobata in stress of flooding type combination. This study was conducted in greenhouse with four combinations of flooding treatment on mother ramet (MR) and daughter ramet (DR) for 25 days. Several parameters were measured are shoot growth, relative growth rate (RGR), biomass, biomass allocation, adventitious root growth, and lenticel hypertrophy. The highest clonal performance was observed for the combination of field capacity (MR)- waterlogged (DR). The lowest performance was observed for the combination of waterlogged (MR)-submergence (DR). There were decreases in the shoot growth, RGR, and biomass allocation in mother ramet. However, adventitious root growth and lenticel hypertrophic increased in daughter ramet. The increase of flooding pressure suppresses the performance of clonal plants. Clonal integration buffered clonal plants by improving the performance of daughter ramet in the combination of flooding type. The clonal integration has facilitated W. trilobata invasion in inundated areas.
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276
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Yeung E, van Veen H, Vashisht D, Sobral Paiva AL, Hummel M, Rankenberg T, Steffens B, Steffen-Heins A, Sauter M, de Vries M, Schuurink RC, Bazin J, Bailey-Serres J, Voesenek LACJ, Sasidharan R. 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: 87] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [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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Affiliation(s)
- Elaine Yeung
- Plant Ecophysiology, Institute of Environmental Biology, Utrecht University, 3584 CH Utrecht, The Netherlands
| | - Hans van Veen
- Plant Ecophysiology, Institute of Environmental Biology, Utrecht University, 3584 CH Utrecht, The Netherlands
| | - Divya Vashisht
- Plant Ecophysiology, Institute of Environmental Biology, Utrecht University, 3584 CH Utrecht, The Netherlands
| | - Ana Luiza Sobral Paiva
- Programa de Pós-Graduação em Genética e Biologia Molecular, Departamento de Genética, Universidade Federal do Rio Grande do Sul, Porto Alegre, 91509-900 Brazil
| | - Maureen Hummel
- Department of Botany and Plant Sciences, Center for Plant Cell Biology, University of California, Riverside, CA 92521
| | - Tom Rankenberg
- Plant Ecophysiology, Institute of Environmental Biology, Utrecht University, 3584 CH Utrecht, The Netherlands
| | - Bianka Steffens
- Plant Physiology, Philipps University, 35032 Marburg, Germany
| | - Anja Steffen-Heins
- Institute of Human Nutrition and Food Science, Kiel University, 24118 Kiel, Germany
| | - Margret Sauter
- Plant Developmental Biology and Plant Physiology, Kiel University, 24118 Kiel, Germany
| | - Michel de Vries
- Plant Physiology, Swammerdam Institute for Life Sciences, University of Amsterdam, 1098 XH Amsterdam, The Netherlands
| | - Robert C Schuurink
- Plant Physiology, Swammerdam Institute for Life Sciences, University of Amsterdam, 1098 XH Amsterdam, The Netherlands
| | - Jérémie Bazin
- IPS2, Institute of Plant Science-Paris Saclay (CNRS, Institut National de la Recherche Agronomique), University of Paris-Saclay, 91405 Orsay, France
| | - Julia Bailey-Serres
- Plant Ecophysiology, Institute of Environmental Biology, Utrecht University, 3584 CH Utrecht, The Netherlands;
- Department of Botany and Plant Sciences, Center for Plant Cell Biology, University of California, Riverside, CA 92521
| | - Laurentius A C J Voesenek
- Plant Ecophysiology, Institute of Environmental Biology, Utrecht University, 3584 CH Utrecht, The Netherlands
| | - Rashmi Sasidharan
- Plant Ecophysiology, Institute of Environmental Biology, Utrecht University, 3584 CH Utrecht, The Netherlands;
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277
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Ramadoss N, Gupta D, Vaidya BN, Joshee N, Basu C. Functional characterization of 1-aminocyclopropane-1-carboxylic acid oxidase gene in Arabidopsis thaliana and its potential in providing flood tolerance. Biochem Biophys Res Commun 2018; 503:365-370. [PMID: 29894687 DOI: 10.1016/j.bbrc.2018.06.036] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2018] [Accepted: 06/09/2018] [Indexed: 11/15/2022]
Abstract
Ethylene is a phytohormone that has gained importance through its role in stress tolerance and fruit ripening. In our study we evaluated the functional potential of the enzyme involved in ethylene biosynthesis of plants called ACC (aminocyclopropane-1-carboxylic acid) oxidase which converts precursor ACC to ethylene. Studies on ethylene have proven that it is effective in improving the flood tolerance in plants. Thus our goal was to understand the potential of ACC oxidase gene overexpression in providing flood tolerance in transgenic plants. ACC oxidase gene was PCR amplified and inserted into the pBINmgfp5-er vector, under the control of a constitutive Cauliflower Mosaic Virus promoter. GV101 strain of Agrobacterium tumefaciens containing recombinant pBINmgfp5-er vector (referred herein as pBIN-ACC) was used for plant transformation by the 'floral dip' method. The transformants were identified through kanamycin selection and grown till T3 (third transgenic) generation. The flood tolerance was assessed by placing both control and transgenic plants on deep plastic trays filled with tap water that covered the soil surface. Our result shows that wild-type Arabidopsis could not survive more than 20 days under flooding while the transgenic lines survived 35 days, suggesting development of flood tolerance with overexpression of ACC oxidase. Further molecular studies should be done to elucidate the role and pathways of ACC oxidase and other phytohormones involved in the development of flood adaptation.
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Affiliation(s)
- Niveditha Ramadoss
- Department of Biology, California State University, Northridge, CA, 91330, USA
| | - Dinesh Gupta
- Department of Biology, California State University, Northridge, CA, 91330, USA
| | - Brajesh N Vaidya
- Agricultural Research Station, Fort Valley State University, Fort Valley, GA, 31030, USA
| | - Nirmal Joshee
- Agricultural Research Station, Fort Valley State University, Fort Valley, GA, 31030, USA
| | - Chhandak Basu
- Department of Biology, California State University, Northridge, CA, 91330, USA.
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278
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Meitha K, Agudelo-Romero P, Signorelli S, Gibbs DJ, Considine JA, Foyer CH, Considine MJ. Developmental control of hypoxia during bud burst in grapevine. PLANT, CELL & ENVIRONMENT 2018; 41:1154-1170. [PMID: 29336037 DOI: 10.1111/pce.13141] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/2017] [Revised: 01/02/2018] [Accepted: 01/04/2018] [Indexed: 05/08/2023]
Abstract
Dormant or quiescent buds of woody perennials are often dense and in the case of grapevine (Vitis vinifera L.) have a low tissue oxygen status. The precise timing of the decision to resume growth is difficult to predict, but once committed, the increase in tissue oxygen status is rapid and developmentally regulated. Here, we show that more than a third of the grapevine homologues of widely conserved hypoxia-responsive genes and nearly a fifth of all grapevine genes possessing a plant hypoxia-responsive promoter element were differentially regulated during bud burst, in apparent harmony with resumption of meristem identity and cell-cycle gene regulation. We then investigated the molecular and biochemical properties of the grapevine ERF-VII homologues, which in other species are oxygen labile and function in transcriptional regulation of hypoxia-responsive genes. Each of the 3 VvERF-VIIs were substrates for oxygen-dependent proteolysis in vitro, as a function of the N-terminal cysteine. Collectively, these data support an important developmental function of oxygen-dependent signalling in determining the timing and effective coordination bud burst in grapevine. In addition, novel regulators, including GASA-, TCP-, MYB3R-, PLT-, and WUS-like transcription factors, were identified as hallmarks of the orderly and functional resumption of growth following quiescence in buds.
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Affiliation(s)
- Karlia Meitha
- The UWA Institute of Agriculture, The University of Western Australia, Perth, 6009, Australia
- The School of Molecular and Chemical Sciences and UWA School of Agriculture and Environment, The University of Western Australia, Perth, 6009, Australia
| | - Patricia Agudelo-Romero
- The UWA Institute of Agriculture, The University of Western Australia, Perth, 6009, Australia
- The School of Molecular and Chemical Sciences and UWA School of Agriculture and Environment, The University of Western Australia, Perth, 6009, Australia
- ARC Centre of Excellence in Plant Energy Biology, The University of Western Australia, Perth, 6009, Australia
| | - Santiago Signorelli
- The UWA Institute of Agriculture, The University of Western Australia, Perth, 6009, Australia
- The School of Molecular and Chemical Sciences and UWA School of Agriculture and Environment, The University of Western Australia, Perth, 6009, Australia
- Departamento de Biología Vegetal, Universidad de la República, Montevideo, 12900, Uruguay
| | - Daniel J Gibbs
- School of Biosciences, University of Birmingham, Birmingham, B15 2TT, UK
| | - John A Considine
- The UWA Institute of Agriculture, The University of Western Australia, Perth, 6009, Australia
- The School of Molecular and Chemical Sciences and UWA School of Agriculture and Environment, The University of Western Australia, Perth, 6009, Australia
| | - Christine H Foyer
- The UWA Institute of Agriculture, The University of Western Australia, Perth, 6009, Australia
- The School of Molecular and Chemical Sciences and UWA School of Agriculture and Environment, The University of Western Australia, Perth, 6009, Australia
- Centre for Plant Sciences, University of Leeds, Leeds, West Yorkshire, LS2 9JT, UK
| | - Michael J Considine
- The UWA Institute of Agriculture, The University of Western Australia, Perth, 6009, Australia
- The School of Molecular and Chemical Sciences and UWA School of Agriculture and Environment, The University of Western Australia, Perth, 6009, Australia
- Centre for Plant Sciences, University of Leeds, Leeds, West Yorkshire, LS2 9JT, UK
- Department of Primary Industries and Rural Development, South Perth, 6151, Australia
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279
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Zhu QG, Gong ZY, Wang MM, Li X, Grierson D, Yin XR, Chen KS. A transcription factor network responsive to high CO2/hypoxia is involved in deastringency in persimmon fruit. JOURNAL OF EXPERIMENTAL BOTANY 2018; 69:2061-2070. [PMID: 29390151 PMCID: PMC6018754 DOI: 10.1093/jxb/ery028] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2017] [Accepted: 01/16/2018] [Indexed: 05/09/2023]
Abstract
Plant responses to anaerobic environments are regulated by ethylene-response factors (ERFs) in both vegetative and productive organs, but the roles of other transcription factors (TFs) in hypoxia responses are poorly understood. In this study, eight TFs (DkbHLH1, DkMYB9/10/11, DkRH2-1, DkGT3-1, DkAN1-1, DkHSF1) were shown to be strongly up-regulated by an artificial high-CO2 atmosphere (1% O2 and 95% CO2). Dual-luciferase assays indicated that some TFs were activators of previously characterized DkERFs, including DkMYB10 for the DkERF9 promoter, DkERF18/19 and DkMYB6 for the DkERF19 promoter, and DkERF21/22 for the DkERF10 promoter. Yeast one-hybrid and cis-element mutagenesis confirmed these physical interactions with one exception. The potential roles of these TFs in persimmon fruit deastringency were analysed by investigating their transient over-expression (TOX) in persimmon fruit discs, which indicated that DkMYB6TOX, DkMYB10TOX, DkERF18TOX, and DkERF19TOX were all effective in causing insolubilization of tannins, concomitantly with the up-regulation of the corresponding genes. These results indicated that multiple TFs of different classes are responsive to high-CO2/hypoxia in fruit tissues, and that a TF-TF regulatory cascade is involved in the hypoxia responses involving the Group VII DkERF10, and DkERFs and DkMYBs.
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Affiliation(s)
- Qing-gang Zhu
- Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology, Zhejiang University, Zijingang Campus, Hangzhou, PR China
| | - Zi-yuan Gong
- Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology, Zhejiang University, Zijingang Campus, Hangzhou, PR China
| | - Miao-miao Wang
- Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology, Zhejiang University, Zijingang Campus, Hangzhou, PR China
| | - Xian Li
- Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology, Zhejiang University, Zijingang Campus, Hangzhou, PR China
- The State Agriculture Ministry Laboratory of Horticultural Plant Growth, Development and Quality Improvement, Zhejiang University, Zijingang Campus, Hangzhou, PR China
| | - Donald Grierson
- Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology, Zhejiang University, Zijingang Campus, Hangzhou, PR China
- Plant & Crop Sciences Division, School of Biosciences, University of Nottingham, Sutton Bonington Campus, Loughborough, UK
| | - Xue-ren Yin
- Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology, Zhejiang University, Zijingang Campus, Hangzhou, PR China
- The State Agriculture Ministry Laboratory of Horticultural Plant Growth, Development and Quality Improvement, Zhejiang University, Zijingang Campus, Hangzhou, PR China
- Correspondence:
| | - Kun-song Chen
- Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative Biology, Zhejiang University, Zijingang Campus, Hangzhou, PR China
- The State Agriculture Ministry Laboratory of Horticultural Plant Growth, Development and Quality Improvement, Zhejiang University, Zijingang Campus, Hangzhou, PR China
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280
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do Nascimento SV, Magalhães MM, Cunha RL, Costa PHDO, Alves RCDO, de Oliveira GC, Valadares RBDS. Differential accumulation of proteins in oil palms affected by fatal yellowing disease. PLoS One 2018; 13:e0195538. [PMID: 29621343 PMCID: PMC5886584 DOI: 10.1371/journal.pone.0195538] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2017] [Accepted: 03/23/2018] [Indexed: 11/20/2022] Open
Abstract
There is still no consensus on the true origin of fatal yellowing, one of the most important diseases affecting oil palm (Elaeis guineensis Jacq.) plantations. This study involved two-dimensional liquid chromatography coupled with tandem mass spectrometry (2D-UPLC-MSE) analyses to identify changes in protein profiles of oil palms affected by FY disease. Oil palm roots were sampled from two growing areas. Differential accumulation of proteins was assessed by comparing plants with and without symptoms and between plants at different stages of FY development. Most of the proteins identified with differential accumulation were those related to stress response and energy metabolism. The latter proteins include the enzymes alcohol dehydrogenase and aldehyde dehydrogenase, related to alcohol fermentation, which were identified in plants with and without symptoms. The presence of these enzymes suggests an anaerobic condition before or during FY. Transketolase, isoflavone reductase, cinnamyl alcohol dehydrogenase, caffeic acid 3-O-methyltransferase, S-adenosylmethionine synthase, aldehyde dehydrogenase and ferritin, among others, were identified as potential marker proteins and could be used to guide selection of FY-tolerant oil palm genotypes or to understand the source of this anomaly. When comparing different stages of FY, we observed high accumulation of alcohol dehydrogenase and other abiotic stress related-proteins at all disease stages. On the other hand, biological stress-related proteins were more accumulated at later stages of the disease. These results suggest that changes in abiotic factors can trigger FY development, creating conditions for the establishment of opportunistic pathogens.
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Affiliation(s)
- Sidney Vasconcelos do Nascimento
- Instituto Tecnológico Vale, Belém, Pará, Brazil
- Programa de Pós-Graduação em Biotecnologia Aplicada à Agropecuária, Universidade Federal Rural da Amazônia, Belém, Pará, Brazil
| | | | - Roberto Lisboa Cunha
- Programa de Pós-Graduação em Biotecnologia Aplicada à Agropecuária, Universidade Federal Rural da Amazônia, Belém, Pará, Brazil
- Analysis of sustainable system laboratory, Embrapa Amazônia Oriental, Belém, Pará, Brazil
| | | | | | | | - Rafael Borges da Silva Valadares
- Instituto Tecnológico Vale, Belém, Pará, Brazil
- Programa de Pós-Graduação em Biotecnologia Aplicada à Agropecuária, Universidade Federal Rural da Amazônia, Belém, Pará, Brazil
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281
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Locke AM, Barding GA, Sathnur S, Larive CK, Bailey-Serres J. Rice SUB1A constrains remodelling of the transcriptome and metabolome during submergence to facilitate post-submergence recovery. PLANT, CELL & ENVIRONMENT 2018; 41:721-736. [PMID: 29094353 DOI: 10.1111/pce.13094] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2017] [Revised: 10/09/2017] [Accepted: 10/11/2017] [Indexed: 05/24/2023]
Abstract
The rice (Oryza sativa L.) ethylene-responsive transcription factor gene SUB1A-1 confers tolerance to prolonged, complete submergence by limiting underwater elongation growth. Upon desubmergence, SUB1A-1 genotypes rapidly recover photosynthetic function and recommence development towards flowering. The underpinnings of the transition from stress amelioration to the return to homeostasis are not well known. Here, transcriptomic and metabolomic analyses were conducted to identify mechanisms by which SUB1A improves physiological function over the 24 hr following a sublethal submergence event. Evaluation of near-isogenic genotypes after submergence and over a day of reaeration demonstrated that SUB1A transiently constrains the remodelling of cellular activities associated with growth. SUB1A influenced the abundance of ca. 1,400 transcripts and had a continued impact on metabolite content, particularly free amino acids, glucose, and sucrose, throughout the recovery period. SUB1A promoted recovery of metabolic homeostasis but had limited influence on mRNAs associated with growth processes and photosynthesis. The involvement of low energy sensing during submergence and recovery was supported by dynamics in trehalose-6-phosphate and mRNAs encoding key enzymes and signalling proteins, which were modulated by SUB1A. This study provides new evidence of convergent signalling pathways critical to the rapidly reversible management of carbon and nitrogen metabolism in submergence resilient rice.
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Affiliation(s)
- Anna M Locke
- Center for Plant Cell Biology, University of California, Riverside, CA, 92521, USA
- Department of Botany and Plant Sciences, University of California, Riverside, CA, 92521, USA
- Soybean and Nitrogen Fixation Research Unit, USDA-ARS, Raleigh, NC, 27695, USA
- Department of Crop and Soil Sciences, North Carolina State University, Raleigh, NC, 27695-7620, USA
| | - Gregory A Barding
- Center for Plant Cell Biology, University of California, Riverside, CA, 92521, USA
- Department of Chemistry, University of California, Riverside, CA, 92521, USA
- Chemistry and Biochemistry Department, California State Polytechnic University, Pomona, CA, 91768, USA
| | - Sumukh Sathnur
- Department of Chemistry, University of California, Riverside, CA, 92521, USA
| | - Cynthia K Larive
- Center for Plant Cell Biology, University of California, Riverside, CA, 92521, USA
- Department of Chemistry, University of California, Riverside, CA, 92521, USA
| | - Julia Bailey-Serres
- Center for Plant Cell Biology, University of California, Riverside, CA, 92521, USA
- Department of Botany and Plant Sciences, University of California, Riverside, CA, 92521, USA
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282
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Takahashi H, Xiaohua Q, Shimamura S, Yanagawa A, Hiraga S, Nakazono M. Sucrose supply from leaves is required for aerenchymatous phellem formation in hypocotyl of soybean under waterlogged conditions. ANNALS OF BOTANY 2018; 121:723-732. [PMID: 29370345 PMCID: PMC5853023 DOI: 10.1093/aob/mcx205] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2017] [Accepted: 12/12/2017] [Indexed: 05/21/2023]
Abstract
Background and Aims Soil waterlogging often causes oxygen deficiency in the root systems of plants and severely inhibits plant growth. Formation of aerenchyma - interconnected spaces that facilitate the movement of gases between and within the aerial and submerged parts of plants - is an adaptive trait for coping with waterlogged conditions. Soybean (Glycine max) forms porous secondary tissues known as aerenchymatous phellem (AP), which are derived from the outermost cell layer of phellogen. To understand what factors other than waterlogging are involved in phellogen and AP formation, we examined how their formation in soybean seedlings was affected by darkness, CO2 deficiency and blockage of phloem transport. Methods Aerenchymatous phellem and phellogen formation were expressed as area ratios in cross-sections of hypocotyl. CO2 was depleted by use of calcium oxide and sodium hydroxide. Phloem transport was blocked by heat-girdling of hypocotyls. Sucrose levels were measured by spectrophotometry. Key Results Under light conditions, waterlogging induced the accumulation of high concentrations of sucrose in hypocotyls, followed by phellogen and AP formation in hypocotyls. Phellogen formation and AP formation were inhibited by darkness, CO2 deficiency and blockage of phloem transport. Phellogen formation and AP formation were also inhibited by excision of shoots above the epicotyl, but they recovered following application of sucrose (but not glucose or fructose application) to the cut surface. Conclusions The results demonstrate that sucrose derived from leaves is essential for AP and phellogen formation in soybean hypocotyls under waterlogged soil conditions. Maintenance of a high sucrose concentration is thus essential for the development of phellogen and AP and the differentiation of phellogen to AP.
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Affiliation(s)
- Hirokazu Takahashi
- Graduate School of Bioagricultural Sciences, Nagoya University, Furo-cho, Chikusa, Nagoya, Japan
| | - Qi Xiaohua
- Department of Horticulture, School of Horticulture and Plant Protection, Yangzhou University, Yangzhou, Jiangsu, P.R. China
| | - Satoshi Shimamura
- NARO Tohoku Agricultural Research Center, Kariwano, Daisen, Akita, Japan
| | - Asako Yanagawa
- Graduate School of Bioagricultural Sciences, Nagoya University, Furo-cho, Chikusa, Nagoya, Japan
| | - Susumu Hiraga
- NARO Institute of Crop Science, Kannondai, Tsukuba, Ibaraki, Japan
| | - Mikio Nakazono
- Graduate School of Bioagricultural Sciences, Nagoya University, Furo-cho, Chikusa, Nagoya, Japan
- School of Plant Biology, The University of Western Australia, Crawley, WA, Australia
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283
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Lei C, Fan S, Li K, Meng Y, Mao J, Han M, Zhao C, Bao L, Zhang D. iTRAQ-Based Proteomic Analysis Reveals Potential Regulation Networks of IBA-Induced Adventitious Root Formation in Apple. Int J Mol Sci 2018; 19:ijms19030667. [PMID: 29495482 PMCID: PMC5877528 DOI: 10.3390/ijms19030667] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2018] [Revised: 02/14/2018] [Accepted: 02/22/2018] [Indexed: 01/19/2023] Open
Abstract
Adventitious root (AR) formation, which is controlled by endogenous and environmental factors, is indispensable for vegetative asexual propagation. However, comprehensive proteomic data on AR formation are still lacking. The aim of this work was to study indole-3-butyric acid (IBA)-induced AR formation in the dwarf apple rootstock 'T337'. In this study, the effect of IBA on AR formation was analysed. Subsequent to treatment with IBA, both the rooting rate and root length of 'T337' increased significantly. An assessment of hormone levels in basal stem cuttings suggested that auxin, abscisic acid, and brassinolide were higher in basal stem cuttings that received the exogenous IBA application; while zeatin riboside, gibberellins, and jasmonic acid were lower than non-treated basal stem cuttings. To explore the underlying molecular mechanism, an isobaric tags for relative and absolute quantification (iTRAQ)-based proteomic technique was employed to identify the expression profiles of proteins at a key period of adventitious root induction (three days after IBA treatment). In total, 3355 differentially expressed proteins (DEPs) were identified. Many DEPs were closely related to carbohydrate metabolism and energy production, protein homeostasis, reactive oxygen and nitric oxide signaling, and cell wall remodeling biological processes; as well as the phytohormone signaling, which was the most critical process in response to IBA treatment. Further, RT-qPCR analysis was used to evaluate the expression level of nine genes that are involved in phytohormone signaling and their transcriptional levels were mostly in accordance with the protein patterns. Finally, a putative work model was proposed. Our study establishes a foundation for further research and sheds light on IBA-mediated AR formation in apple as well as other fruit rootstock cuttings.
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Affiliation(s)
- Chao Lei
- College of Horticulture, Northwest A&F University, Yangling 712100, China.
| | - Sheng Fan
- College of Horticulture, Northwest A&F University, Yangling 712100, China.
| | - Ke Li
- College of Horticulture, Northwest A&F University, Yangling 712100, China.
| | - Yuan Meng
- College of Horticulture, Northwest A&F University, Yangling 712100, China.
| | - Jiangping Mao
- College of Horticulture, Northwest A&F University, Yangling 712100, China.
| | - Mingyu Han
- College of Horticulture, Northwest A&F University, Yangling 712100, China.
| | - Caiping Zhao
- College of Horticulture, Northwest A&F University, Yangling 712100, China.
| | - Lu Bao
- College of Horticulture, Northwest A&F University, Yangling 712100, China.
| | - Dong Zhang
- College of Horticulture, Northwest A&F University, Yangling 712100, China.
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284
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Das G, Rao GJN, Varier M, Prakash A, Prasad D. Improved Tapaswini having four BB resistance genes pyramided with six genes/QTLs, resistance/tolerance to biotic and abiotic stresses in rice. Sci Rep 2018; 8:2413. [PMID: 29402905 PMCID: PMC5799378 DOI: 10.1038/s41598-018-20495-x] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2016] [Accepted: 01/19/2018] [Indexed: 12/31/2022] Open
Abstract
Rice, a major food crop, is grown in a wide range of ecological conditions and suffers significant yield losses as it is constantly exposed to a wide range of environmental and biotic stresses. The prevalence of different biotypes/strains has necessitated assembling of numerous resistance genes/QTLs into elite genotypes to confer a broader scale of resistance. The current study reports successful pyramiding of genes/QTLs that confer tolerance/resistance to submergence (Sub1), salinity (Saltol), blast (Pi2, Pi9) and gall midge (Gm1, Gm4) to supplement the four bacterial blight resistance genes (Xa 4, xa5, xa13, Xa21) present in Improved Tapaswini, an elite cultivar. The precise transfer of genes/QTLs was accomplished through effective foreground selection and suitable gene pyramids were identified. Background selection was practiced using morphological and grain quality traits to enhance the recovery of the recurrent parental genome. In the bioassays, the pyramids exhibited higher levels of resistance/ tolerance against the target stresses. The novel feature of the study was successful pyramidization and demonstration of the function of ten genes/QTLs in a new genotype. This success can stimulate several such studies to realize the full potential of molecular plant breeding as the foundation for rice improvement.
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Affiliation(s)
- Gitishree Das
- Crop Improvement Division, ICAR-National Rice Research Institute, Cuttack, Odisha, 753006, India.
- Research Institute of Biotechnology & Medical Converged Science, Dongguk University-Seoul, Ilsandong-gu, Gyeonggi-do, 10326, Republic of Korea.
| | - Gundimeda J N Rao
- Crop Improvement Division, ICAR-National Rice Research Institute, Cuttack, Odisha, 753006, India.
- Department of Bio Sciences and Bio Engineering, Indian Institute of Technology Guwahati, Guwahati, Assam, 781039, India.
| | - M Varier
- NRRI-Central Rainfed Upland Rice Research Station, Hazaribagh, Jharkhand, 825301, India
| | - A Prakash
- Crop Protection Division, ICAR-National Rice Research Institute, Cuttack, Odisha, 753006, India
| | - Dokku Prasad
- Crop Improvement Division, ICAR-National Rice Research Institute, Cuttack, Odisha, 753006, India
- Kaveri Seeds, Secunderabad, Telangana, 500003, India
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285
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Cassia R, Nocioni M, Correa-Aragunde N, Lamattina L. Climate Change and the Impact of Greenhouse Gasses: CO 2 and NO, Friends and Foes of Plant Oxidative Stress. FRONTIERS IN PLANT SCIENCE 2018; 9:273. [PMID: 29545820 PMCID: PMC5837998 DOI: 10.3389/fpls.2018.00273] [Citation(s) in RCA: 82] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/18/2017] [Accepted: 02/16/2018] [Indexed: 05/23/2023]
Abstract
Here, we review information on how plants face redox imbalance caused by climate change, and focus on the role of nitric oxide (NO) in this response. Life on Earth is possible thanks to greenhouse effect. Without it, temperature on Earth's surface would be around -19°C, instead of the current average of 14°C. Greenhouse effect is produced by greenhouse gasses (GHG) like water vapor, carbon dioxide (CO2), methane (CH4), nitrous oxides (NxO) and ozone (O3). GHG have natural and anthropogenic origin. However, increasing GHG provokes extreme climate changes such as floods, droughts and heat, which induce reactive oxygen species (ROS) and oxidative stress in plants. The main sources of ROS in stress conditions are: augmented photorespiration, NADPH oxidase (NOX) activity, β-oxidation of fatty acids and disorders in the electron transport chains of mitochondria and chloroplasts. Plants have developed an antioxidant machinery that includes the activity of ROS detoxifying enzymes [e.g., superoxide dismutase (SOD), ascorbate peroxidase (APX), catalase (CAT), glutathione peroxidase (GPX), and peroxiredoxin (PRX)], as well as antioxidant molecules such as ascorbic acid (ASC) and glutathione (GSH) that are present in almost all subcellular compartments. CO2 and NO help to maintain the redox equilibrium. Higher CO2 concentrations increase the photosynthesis through the CO2-unsaturated Rubisco activity. But Rubisco photorespiration and NOX activities could also augment ROS production. NO regulate the ROS concentration preserving balance among ROS, GSH, GSNO, and ASC. When ROS are in huge concentration, NO induces transcription and activity of SOD, APX, and CAT. However, when ROS are necessary (e.g., for pathogen resistance), NO may inhibit APX, CAT, and NOX activity by the S-nitrosylation of cysteine residues, favoring cell death. NO also regulates GSH concentration in several ways. NO may react with GSH to form GSNO, the NO cell reservoir and main source of S-nitrosylation. GSNO could be decomposed by the GSNO reductase (GSNOR) to GSSG which, in turn, is reduced to GSH by glutathione reductase (GR). GSNOR may be also inhibited by S-nitrosylation and GR activated by NO. In conclusion, NO plays a central role in the tolerance of plants to climate change.
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286
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Wany A, Kumari A, Gupta KJ. Nitric oxide is essential for the development of aerenchyma in wheat roots under hypoxic stress. PLANT, CELL & ENVIRONMENT 2017; 40:3002-3017. [PMID: 28857271 DOI: 10.1111/pce.13061] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/29/2017] [Revised: 08/23/2017] [Accepted: 08/25/2017] [Indexed: 05/09/2023]
Abstract
In response to flooding/waterlogging, plants develop various anatomical changes including the formation of lysigenous aerenchyma for the delivery of oxygen to roots. Under hypoxia, plants produce high levels of nitric oxide (NO) but the role of this molecule in plant-adaptive response to hypoxia is not known. Here, we investigated whether ethylene-induced aerenchyma requires hypoxia-induced NO. Under hypoxic conditions, wheat roots produced NO apparently via nitrate reductase and scavenging of NO led to a marked reduction in aerenchyma formation. Interestingly, we found that hypoxically induced NO is important for induction of the ethylene biosynthetic genes encoding ACC synthase and ACC oxidase. Hypoxia-induced NO accelerated production of reactive oxygen species, lipid peroxidation, and protein tyrosine nitration. Other events related to cell death such as increased conductivity, increased cellulase activity, DNA fragmentation, and cytoplasmic streaming occurred under hypoxia, and opposing effects were observed by scavenging NO. The NO scavenger cPTIO (2-(4-carboxyphenyl)-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide potassium salt) and ethylene biosynthetic inhibitor CoCl2 both led to reduced induction of genes involved in signal transduction such as phospholipase C, G protein alpha subunit, calcium-dependent protein kinase family genes CDPK, CDPK2, CDPK 4, Ca-CAMK, inositol 1,4,5-trisphosphate 5-phosphatase 1, and protein kinase suggesting that hypoxically induced NO is essential for the development of aerenchyma.
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Affiliation(s)
- Aakanksha Wany
- National Institute for Plant Genome Research, New Delhi, 110067, India
| | - Aprajita Kumari
- National Institute for Plant Genome Research, New Delhi, 110067, India
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287
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Functional Characterization of Waterlogging and Heat Stresses Tolerance Gene Pyruvate decarboxylase 2 from Actinidia deliciosa. Int J Mol Sci 2017; 18:ijms18112377. [PMID: 29120390 PMCID: PMC5713346 DOI: 10.3390/ijms18112377] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2017] [Revised: 11/02/2017] [Accepted: 11/07/2017] [Indexed: 11/17/2022] Open
Abstract
A previous report showed that both Pyruvatedecarboxylase (PDC) genes were significantly upregulated in kiwifruit after waterlogging treatment using Illumina sequencing technology, and that the kiwifruit AdPDC1 gene was required during waterlogging, but might not be required during other environmental stresses. Here, the function of another PDC gene, named AdPDC2, was analyzed. The expression of the AdPDC2 gene was determined using qRT-PCR, and the results showed that the expression levels of AdPDC2 in the reproductive organs were much higher than those in the nutritive organs. Waterlogging, NaCl, and heat could induce the expression of AdPDC2. Overexpression of kiwifruit AdPDC2 in transgenic Arabidopsis enhanced resistance to waterlogging and heat stresses in five-week-old seedlings, but could not enhance resistance to NaCl and mannitol stresses at the seed germination stage and in early seedlings. These results suggested that the kiwifruit AdPDC2 gene may play an important role in waterlogging resistance and heat stresses in kiwifruit.
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288
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Wang M, Zhu Q, Deng C, Luo Z, Sun N, Grierson D, Yin X, Chen K. Hypoxia-responsive ERFs involved in postdeastringency softening of persimmon fruit. PLANT BIOTECHNOLOGY JOURNAL 2017; 15:1409-1419. [PMID: 28301712 PMCID: PMC5633758 DOI: 10.1111/pbi.12725] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2016] [Revised: 02/23/2017] [Accepted: 03/12/2017] [Indexed: 05/03/2023]
Abstract
Removal of astringency by endogenously formed acetaldehyde, achieved by postharvest anaerobic treatment, is of critical importance for many types of persimmon fruit. Although an anaerobic environment accelerates de-astringency, it also has the deleterious effect of promoting excessive softening, reducing shelf life and marketability. Some hypoxia-responsive ethylene response factors (ERFs) participate in anaerobic de-astringency, but their role in accelerated softening was unclear. Undesirable rapid softening induced by high CO2 (95%) was ameliorated by adding the ethylene inhibitor 1-MCP (1 μL/L), resulting in reduced astringency while maintaining firmness, suggesting that CO2 -induced softening involves ethylene signalling. Among the hypoxia-responsive genes, expression of eight involved in fruit cell wall metabolism (Dkβ-gal1/4, DkEGase1, DkPE1/2, DkPG1, DkXTH9/10) and three ethylene response factor genes (DkERF8/16/19) showed significant correlations with postdeastringency fruit softening. Dual-luciferase assay indicated that DkERF8/16/19 could trans-activate the DkXTH9 promoter and this interaction was abolished by a mutation introduced into the C-repeat/dehydration-responsive element of the DkXTH9 promoter, supporting the conclusion that these DkERFs bind directly to the DkXTH9 promoter and regulate this gene, which encodes an important cell wall metabolism enzyme. Some hypoxia-responsive ERF genes are involved in deastringency and softening, and this linkage was uncoupled by 1-MCP. Fruit of the Japanese cultivar 'Tonewase' provide a model for altered anaerobic response, as they lost astringency yet maintained firmness after CO2 treatment without 1-MCP and changes in cell wall enzymes and ERFs did not occur.
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Affiliation(s)
- Miao‐miao Wang
- Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative BiologyZhejiang UniversityHangzhouChina
- The State Agriculture Ministry Laboratory of Horticultural Plant GrowthDevelopment and Quality ImprovementZhejiang UniversityHangzhouChina
| | - Qing‐gang Zhu
- Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative BiologyZhejiang UniversityHangzhouChina
| | - Chu‐li Deng
- Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative BiologyZhejiang UniversityHangzhouChina
| | - Zheng‐rong Luo
- Key Laboratory of Horticultural Plant BiologyMinistry of EducationHuazhong Agricultural UniversityWuhanChina
| | - Ning‐jing Sun
- Department of Horticultural SciencesCollege of AgricultureGuangxi UniversityNanningChina
| | - Donald Grierson
- Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative BiologyZhejiang UniversityHangzhouChina
- Plant & Crop Sciences DivisionSchool of BiosciencesUniversity of NottinghamLoughboroughUK
| | - Xue‐ren Yin
- Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative BiologyZhejiang UniversityHangzhouChina
- The State Agriculture Ministry Laboratory of Horticultural Plant GrowthDevelopment and Quality ImprovementZhejiang UniversityHangzhouChina
| | - Kun‐song Chen
- Zhejiang Provincial Key Laboratory of Horticultural Plant Integrative BiologyZhejiang UniversityHangzhouChina
- The State Agriculture Ministry Laboratory of Horticultural Plant GrowthDevelopment and Quality ImprovementZhejiang UniversityHangzhouChina
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289
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Lei S, Zeng B, Xu S, Zhang X. Response of basal metabolic rate to complete submergence of riparian species Salix variegata in the Three Gorges reservoir region. Sci Rep 2017; 7:13885. [PMID: 29066737 PMCID: PMC5654956 DOI: 10.1038/s41598-017-13467-0] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2017] [Accepted: 09/25/2017] [Indexed: 01/11/2023] Open
Abstract
One-year old seedlings of Salix variegata (submergence-tolerant) and Cinnamomum camphora (submergence-intolerant) were selected and subjected to complete submergence (2 m) for 1, 5, 10, and 20 days, to elucidate the submergence- tolerance mechanism of S. variegata in the Three Gorges reservoir region. The basal CO2 emission ratios (BCERs) and O2 consumption rates (OCRs) of leaf, stem, and root were determined. The basal O2 consumption rates (BOCRs) were calculated from the OCRs of different parts and their biomass allocations and used for evaluating the basal metabolic rate (BMR) of species with BCERs. The results showed that: (1) The BCERs of both species responded to flooding similarly, and no significant differences occurred between the submerged S. variegata (SS) and the submerged C. camphora (SC) seedlings, and between the control S. variegata (CS) and the control C. camphora (CC) seedlings. (2) The BOCRs of SS were significantly lower than those of SC on days 1 and 20, while no significant differences occurred between CS and CC for every duration. Therefore, the BMRs, evaluated from BOCRs rather than from BCERs, were related to submergence-tolerance of species, and the response of BMR to submergence would contribute to the survival of S. variegata seedlings under flooding.
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Affiliation(s)
- Shutong Lei
- College of Agriculture and Forestry Sciences, Linyi University, Linyi, 276005, China
- Key Laboratory of Eco-Environment in the Three Gorges Reservoir Region (Ministry of Education), School of Life Sciences, Southwest University, Chongqing, 400715, China
| | - Bo Zeng
- Key Laboratory of Eco-Environment in the Three Gorges Reservoir Region (Ministry of Education), School of Life Sciences, Southwest University, Chongqing, 400715, China.
| | - Shaojun Xu
- Key Laboratory of Eco-Environment in the Three Gorges Reservoir Region (Ministry of Education), School of Life Sciences, Southwest University, Chongqing, 400715, China
- Forestry College, Henan University of Science and Technology, Luoyang, 471003, China
| | - Xiaoping Zhang
- Key Laboratory of Eco-Environment in the Three Gorges Reservoir Region (Ministry of Education), School of Life Sciences, Southwest University, Chongqing, 400715, China
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290
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Xiang J, Wu H, Zhang Y, Zhang Y, Wang Y, Li Z, Lin H, Chen H, Zhang J, Zhu D. Transcriptomic Analysis of Gibberellin- and Paclobutrazol-Treated Rice Seedlings under Submergence. Int J Mol Sci 2017; 18:E2225. [PMID: 29064391 PMCID: PMC5666904 DOI: 10.3390/ijms18102225] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2017] [Revised: 10/16/2017] [Accepted: 10/19/2017] [Indexed: 01/08/2023] Open
Abstract
Submergence stress is a limiting factor for rice growing in rainfed lowland areas of the world. It is known that the phytohormone gibberellin (GA) has negative effects on submergence tolerance in rice, while its inhibitor paclobutrazol (PB) does the opposite. However, the physiological and molecular basis underlying the GA- and PB-regulated submergence response remains largely unknown. In this study, we reveal that PB could significantly enhance rice seedling survival by retaining a higher level of chlorophyll content and alcohol dehydrogenase activity, and decelerating the consumption of non-structure carbohydrate when compared with the control and GA-treated samples. Further transcriptomic analysis identified 3936 differentially expressed genes (DEGs) among the GA- and PB-treated samples and control, which are extensively involved in the submergence and other abiotic stress responses, phytohormone biosynthesis and signaling, photosynthesis, and nutrient metabolism. The results suggested that PB enhances rice survival under submergence through maintaining the photosynthesis capacity and reducing nutrient metabolism. Taken together, the current study provided new insight into the mechanism of phytohormone-regulated submergence response in rice.
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Affiliation(s)
- Jing Xiang
- State Key Lab of Rice Biology, China National Rice Research Institute, Hangzhou 311400, China.
| | - Hui Wu
- State Key Lab of Rice Biology, China National Rice Research Institute, Hangzhou 311400, China.
| | - Yuping Zhang
- State Key Lab of Rice Biology, China National Rice Research Institute, Hangzhou 311400, China.
| | - Yikai Zhang
- State Key Lab of Rice Biology, China National Rice Research Institute, Hangzhou 311400, China.
| | - Yifeng Wang
- State Key Lab of Rice Biology, China National Rice Research Institute, Hangzhou 311400, China.
| | - Zhiyong Li
- State Key Lab of Rice Biology, China National Rice Research Institute, Hangzhou 311400, China.
| | - Haiyan Lin
- Yuan LongPing High-TechAgriculture Co., Ltd., Changsha 410001, China.
| | - Huizhe Chen
- State Key Lab of Rice Biology, China National Rice Research Institute, Hangzhou 311400, China.
| | - Jian Zhang
- State Key Lab of Rice Biology, China National Rice Research Institute, Hangzhou 311400, China.
| | - Defeng Zhu
- State Key Lab of Rice Biology, China National Rice Research Institute, Hangzhou 311400, China.
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291
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Pérez-Jiménez M, Hernández-Munuera M, Piñero Zapata MC, López-Ortega G, Del Amor FM. Two minuses can make a plus: waterlogging and elevated CO 2 interactions in sweet cherry (Prunus avium) cultivars. PHYSIOLOGIA PLANTARUM 2017; 161:257-272. [PMID: 28568609 DOI: 10.1111/ppl.12590] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2017] [Revised: 04/20/2017] [Accepted: 05/19/2017] [Indexed: 06/07/2023]
Abstract
The increase in the ambient concentration of CO2 and other greenhouse gases is producing climate events that can compromise crop survival. However, high CO2 concentrations are sometimes able to mitigate certain stresses such as salinity or drought. In this experiment, the effects of waterlogging and CO2 are studied in combination to elucidate the eventual response in sweet cherry trees. For this purpose, four sweet cherry cultivars ('Burlat', 'Cashmere', 'Lapins and 'New Star') were grafted on a typically hypoxia-tolerant rootstock (Mariana 2624) and submitted to waterlogging for 7 days at either ambient CO2 concentration (400 µmol mol-1 ) or at elevated CO2 (800 µmol mol-1 ). Waterlogging affected plants drastically, by decreasing photosynthesis, stomatal conductance, transpiration, chlorophyll fluorescence and growth. It also brought about the accumulation of proline, chloride and sulfate. Nonetheless, raising the CO2 supply not only mitigated all these effects but also induced the accumulation of soluble sugars and starch in the leaf. Therefore, sweet cherry plants submitted to waterlogging were able to overcome this stress when grown in a CO2 -enriched environment.
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Affiliation(s)
- Margarita Pérez-Jiménez
- Departamento de Hortofruticultura, Instituto Murciano de Investigación y Desarrollo Agrario y Alimentario (IMIDA), Murcia, 30150, Spain
| | - María Hernández-Munuera
- Departamento de Hortofruticultura, Instituto Murciano de Investigación y Desarrollo Agrario y Alimentario (IMIDA), Murcia, 30150, Spain
| | - Maria Carmen Piñero Zapata
- Departamento de Hortofruticultura, Instituto Murciano de Investigación y Desarrollo Agrario y Alimentario (IMIDA), Murcia, 30150, Spain
| | - Gregorio López-Ortega
- Departamento de Hortofruticultura, Instituto Murciano de Investigación y Desarrollo Agrario y Alimentario (IMIDA), Murcia, 30150, Spain
| | - Francisco M Del Amor
- Departamento de Hortofruticultura, Instituto Murciano de Investigación y Desarrollo Agrario y Alimentario (IMIDA), Murcia, 30150, Spain
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292
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Giuntoli B, Shukla V, Maggiorelli F, Giorgi FM, Lombardi L, Perata P, Licausi F. Age-dependent regulation of ERF-VII transcription factor activity in Arabidopsis thaliana. PLANT, CELL & ENVIRONMENT 2017; 40:2333-2346. [PMID: 28741696 DOI: 10.1111/pce.13037] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2016] [Revised: 06/27/2017] [Accepted: 06/30/2017] [Indexed: 05/22/2023]
Abstract
The Group VII Ethylene Responsive Factors (ERFs-VII) RAP2.2 and RAP2.12 have been mainly characterized with regard to their contribution as activators of fermentation in plants. However, transcriptional changes measured in conditions that stabilize these transcription factors exceed the mere activation of this biochemical pathway, implying additional roles performed by the ERF-VIIs in other processes. We evaluated gene expression in transgenic Arabidopsis lines expressing a stabilized form of RAP2.12, or hampered in ERF-VII activity, and identified genes affected by this transcriptional regulator and its homologs, including some involved in oxidative stress response, which are not universally induced under anaerobic conditions. The contribution of the ERF-VIIs in regulating this set of genes in response to chemically induced or submergence-stimulated mitochondria malfunctioning was found to depend on the plant developmental stage. A similar age-dependent mechanism also restrained ERF-VII activity upon the core-hypoxic genes, independently of the N-end rule pathway, which is accounted for the control of the anaerobic response. To conclude, this study shed new light on a dual role of ERF-VII proteins under submergence: as positive regulators of the hypoxic response and as repressors of oxidative-stress related genes, depending on the developmental stage at which plants are challenged by stress conditions.
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Affiliation(s)
- Beatrice Giuntoli
- Scuola Superiore Sant'Anna, Institute of Life Sciences, Plantlab, Via Guidiccioni 8/10, 56017, Pisa, Italy
| | - Vinay Shukla
- Scuola Superiore Sant'Anna, Institute of Life Sciences, Plantlab, Via Guidiccioni 8/10, 56017, Pisa, Italy
| | - Federica Maggiorelli
- Biology Department, Università degli Studi di Pisa, Via Luca Ghini 13, 56126, Pisa, Italy
| | - Federico M Giorgi
- Scuola Superiore Sant'Anna, Institute of Life Sciences, Plantlab, Via Guidiccioni 8/10, 56017, Pisa, Italy
- Cancer Research UK Cambridge Institute, University of Cambridge, Robinson Way, Cambridge, CB2 1TN, UK
- Department of Systems Biology, Columbia University, New York, NY, 10027, USA
| | - Lara Lombardi
- Biology Department, Università degli Studi di Pisa, Via Luca Ghini 13, 56126, Pisa, Italy
| | - Pierdomenico Perata
- Scuola Superiore Sant'Anna, Institute of Life Sciences, Plantlab, Via Guidiccioni 8/10, 56017, Pisa, Italy
| | - Francesco Licausi
- Scuola Superiore Sant'Anna, Institute of Life Sciences, Plantlab, Via Guidiccioni 8/10, 56017, Pisa, Italy
- Biology Department, Università degli Studi di Pisa, Via Luca Ghini 13, 56126, Pisa, Italy
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293
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Zhang Q, Huber H, Boerakker JWT, Bosch D, de Kroon H, Visser EJW. Environmental factors constraining adventitious root formation during flooding of Solanum dulcamara. FUNCTIONAL PLANT BIOLOGY : FPB 2017; 44:858-866. [PMID: 32480614 DOI: 10.1071/fp16357] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/14/2016] [Accepted: 01/31/2017] [Indexed: 06/11/2023]
Abstract
Flooding is a compound stress, imposing strong limitations on plant development. The expression of adaptive traits that alleviate flooding stress may be constrained if floodwater levels are too deep. For instance, adventitious root outgrowth is typically less profound in completely submerged plants than in partially submerged plants, suggesting additional constraints in full submergence. As both oxygen and carbohydrates are typically limited resources under submergence, we tested the effects of oxygen concentration in the floodwater and carbohydrate status of the plants on flooding-induced adventitious root formation in Solanum dulcamara L. Partially submerged plants continued to form adventitious roots in low-oxygen floodwater, whereas completely submerged plants developed hardly any roots, even in floodwater with twice the ambient oxygen concentration. This suggests that contact with the atmosphere, enabling internal aeration, is much more important to optimal adventitious root formation than floodwater oxygen concentrations. If plants were depleted of carbohydrates before flooding, adventitious root formation in partial submergence was poor, unless high light was provided. Thus, either stored or newly produced carbohydrates can fuel adventitious root formation. These results imply that the impact of an environmental stress factor like flooding on plant performance may strongly depend on the interplay with other environmental factors.
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Affiliation(s)
- Qian Zhang
- Department of Experimental Plant Ecology, Institute for Water and Wetland Research, Radboud University Nijmegen, Heyendaalseweg 135, 6525 AJ Nijmegen, the Netherlands
| | - Heidrun Huber
- Department of Experimental Plant Ecology, Institute for Water and Wetland Research, Radboud University Nijmegen, Heyendaalseweg 135, 6525 AJ Nijmegen, the Netherlands
| | - Jannah W T Boerakker
- Department of Experimental Plant Ecology, Institute for Water and Wetland Research, Radboud University Nijmegen, Heyendaalseweg 135, 6525 AJ Nijmegen, the Netherlands
| | - Daniek Bosch
- Department of Experimental Plant Ecology, Institute for Water and Wetland Research, Radboud University Nijmegen, Heyendaalseweg 135, 6525 AJ Nijmegen, the Netherlands
| | - Hans de Kroon
- Department of Experimental Plant Ecology, Institute for Water and Wetland Research, Radboud University Nijmegen, Heyendaalseweg 135, 6525 AJ Nijmegen, the Netherlands
| | - Eric J W Visser
- Department of Experimental Plant Ecology, Institute for Water and Wetland Research, Radboud University Nijmegen, Heyendaalseweg 135, 6525 AJ Nijmegen, the Netherlands
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294
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Böckelmann J, Tremetsberger K, Šumberová K, Grausgruber H, Bernhardt KG. Fitness and growth of the ephemeral mudflat species Cyperus fuscus in river and anthropogenic habitats in response to fluctuating water-levels. FLORA 2017; 234:135-149. [PMID: 31719726 PMCID: PMC6850911 DOI: 10.1016/j.flora.2017.07.012] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Cyperus fuscus is a representative of threatened ephemeral wetland plant communities in summer-dry shoreline habitats. We compared variation and plasticity in traits related to fitness and growth of plants germinating from the soil seed bank and established plants from river and secondary anthropogenic habitats. Plants from sites at rivers, fishponds and fish storage ponds were cultivated and selfed to get homogenous seed material for a germination and an environmental manipulation experiment involving three different water regimes. Differences in traits and their plasticities were evaluated by means of linear mixed models. Cyperus fuscus followed a low-oxygen escape strategy when flooded. Seeds of plants derived from the soil seed bank germinated faster than seeds of plants derived from established plants suggesting that short-term selection of genotypes is mediated by the particular conditions on the site during germination. The experiment revealed significant differences between river and secondary habitats as well as between the soil seed bank and established plants. For example, plants from river habitats produced the highest number of culms with inflorescences. The difference was most evident under partial submergence. Plants from fish storage ponds rapidly reached the reproductive phase, but produced less culms with inflorescences. This seemingly allows them to cope with numerous and irregular disturbances and intensive substrate moisture changes. Our results suggest that populations have adapted to conditions at secondary habitats provided by fish farming during the last centuries.
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Affiliation(s)
- Jörg Böckelmann
- Institute of Botany, Department of Integrative Biology and Biodiversity Research, University of Natural Resources and Life Sciences, Vienna, Gregor Mendel-Straβe 33, A-1180 Vienna, Austria
| | - Karin Tremetsberger
- Institute of Botany, Department of Integrative Biology and Biodiversity Research, University of Natural Resources and Life Sciences, Vienna, Gregor Mendel-Straβe 33, A-1180 Vienna, Austria
| | - Kateřina Šumberová
- Department of Vegetation Ecology, Institute of Botany, The Czech Academy of Sciences, Lidická 25/27, CZ-602 00 Brno, Czech Republic
| | - Heinrich Grausgruber
- Division of Plant Breeding, Department of Crop Sciences, University of Natural Resources and Life Sciences, Vienna, Konrad Lorenz-Straβe 24, A-3430 Tulln an der Donau, Austria
| | - Karl-Georg Bernhardt
- Institute of Botany, Department of Integrative Biology and Biodiversity Research, University of Natural Resources and Life Sciences, Vienna, Gregor Mendel-Straβe 33, A-1180 Vienna, Austria
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295
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Zhang P, Lyu D, Jia L, He J, Qin S. Physiological and de novo transcriptome analysis of the fermentation mechanism of Cerasus sachalinensis roots in response to short-term waterlogging. BMC Genomics 2017; 18:649. [PMID: 28830345 PMCID: PMC5568329 DOI: 10.1186/s12864-017-4055-1] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2017] [Accepted: 08/11/2017] [Indexed: 11/10/2022] Open
Abstract
Background Cerasus sachalinensis is widely used in cool regions as a sweet cherry rootstock and is known for its sensitivity to soil waterlogging and waterlogging stress. However, the limited availability of Cerasus genomic resources has considerably restricted the exploration of its waterlogging response mechanism. To understand its reaction to short-term waterlogging, we analyzed the physiology and transcriptomes of C. sachalinensis roots in response to different waterlogging durations. Results In this study, 12,487 differentially expressed genes (DEGs) were identified from Cerasus sachalinensis roots under different waterlogging durations. Carbon metabolism and energy maintenance formed the first coping mechanism stage of C. sachalinensis in response to low oxygen conditions. Root energy processes, including root respiration and activities of the fermentation enzymes alcohol dehydrogenase, pyruvate decarboxylase, and lactate dehydrogenase, showed unique changes after 0 h, 3 h, 6 h, and 24 h of waterlogging exposure. Ribonucleic acid sequencing was used to analyze transcriptome changes in C. sachalinensis roots treated with 3 h, 6 h, and 24 h of waterlogging stress. After de novo assembly, 597,474 unigenes were recognized, of which 355,350 (59.47%) were annotated. To identify the most important pathways represented by DEGs, Gene Ontology and Kyoto Encyclopedia of Genes and Genomes databases were used to compare these genes. The first stage of root reaction to waterlogging stress was activation of carbohydrate metabolism to produce more glucose and maintain energy levels. At 3 h, the glycolytic and fermentation pathways were activated to maintain adenosine triphosphate production. At 24 h, pathways involved in the translation of proteins were activated to further assist the plant in tolerating waterlogging stress. These findings will facilitate a further understanding of the potential mechanisms of plant responses to waterlogging at physiological and transcriptome levels. Conclusions Carbon metabolism and energy maintenance formed the first coping mechanism C. sachalinensis in response to low oxygen conditions, and they may be responsible for its short-term waterlogging response. Our study not only provides the assessment of genomic resources of Cerasus but also paves the way for probing the metabolic and molecular mechanisms underlying the short-term waterlogging response in C. sachalinensis. Electronic supplementary material The online version of this article (doi:10.1186/s12864-017-4055-1) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Peng Zhang
- College of Horticulture/Key Lab of Fruit Quality Development and Regulation of Liaoning Province, Shenyang Agricultural University, Shenyang, Liaoning, 110866, People's Republic of China
| | - Deguo Lyu
- College of Horticulture/Key Lab of Fruit Quality Development and Regulation of Liaoning Province, Shenyang Agricultural University, Shenyang, Liaoning, 110866, People's Republic of China
| | - Luting Jia
- College of Horticulture/Key Lab of Fruit Quality Development and Regulation of Liaoning Province, Shenyang Agricultural University, Shenyang, Liaoning, 110866, People's Republic of China
| | - Jiali He
- College of Horticulture/Key Lab of Fruit Quality Development and Regulation of Liaoning Province, Shenyang Agricultural University, Shenyang, Liaoning, 110866, People's Republic of China
| | - Sijun Qin
- College of Horticulture/Key Lab of Fruit Quality Development and Regulation of Liaoning Province, Shenyang Agricultural University, Shenyang, Liaoning, 110866, People's Republic of China.
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296
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Xu X, Chen M, Ji J, Xu Q, Qi X, Chen X. Comparative RNA-seq based transcriptome profiling of waterlogging response in cucumber hypocotyls reveals novel insights into the de novo adventitious root primordia initiation. BMC PLANT BIOLOGY 2017; 17:129. [PMID: 28747176 PMCID: PMC5530484 DOI: 10.1186/s12870-017-1081-8] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/06/2016] [Accepted: 07/21/2017] [Indexed: 05/03/2023]
Abstract
BACKGROUND Waterlogging is a serious abiotic stress to plant growth because it results in the decline in the supplement of oxygen to submerged tissues. Although cucumber (Cucumis sativus L.) is sensitive to waterlogging, its ability to generate adventitious roots (ARs) facilitates gas diffusion and increases plant survival when the oxygen concentration is decreased. To gain a better understanding of the molecular mechanisms that enable de novo AR primordia emergence upon waterlogging, the RNA sequencing-based transcriptomic responses of two contrasting cucumber genotypes, Zaoer-N (waterlogging tolerant) and Pepino (waterlogging sensitive), which differed in their abilities to form AR were compared. RESULTS More than 27,000 transcripts were detected in cucumber hypocotyls, from which 1494 and 1766 genes in 'Zaoer-N' and 'Pepino', respectively, were differentially expressed 2 days after waterlogging. The significant positive correlation between RNA sequencing data and a qPCR analysis indicated that the identified genes were credible. A comparative analysis revealed that genes functioning in carbohydrate mobilization, nitrate assimilation, hormone production and signaling pathways, transcription factors and cell division might contribute to the waterlogging-triggered AR primordia initiation. Ethylene was determined to be an important plant hormone responsible for the cucumber ARs initiation. Additionally, genes encoding cytochrome P450, ankyrin repeat-containing proteins and sulfite oxidases were determined as important in waterlogging acclimation. CONCLUSION This research broadens our understanding of the mechanism underlying waterlogging-triggered ARs emergence, and provides valuable information for the breeding of cucumber with enhanced waterlogging tolerance.
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Affiliation(s)
- Xuewen Xu
- Department of horticulture, School of Horticulture and Plant Protection, Yangzhou University, 48 wenhui eastroad, Yangzhou, Jiangsu 225009 China
| | - Minyang Chen
- Department of horticulture, School of Horticulture and Plant Protection, Yangzhou University, 48 wenhui eastroad, Yangzhou, Jiangsu 225009 China
| | - Jing Ji
- Department of horticulture, School of Horticulture and Plant Protection, Yangzhou University, 48 wenhui eastroad, Yangzhou, Jiangsu 225009 China
| | - Qiang Xu
- Department of horticulture, School of Horticulture and Plant Protection, Yangzhou University, 48 wenhui eastroad, Yangzhou, Jiangsu 225009 China
| | - Xiaohua Qi
- Department of horticulture, School of Horticulture and Plant Protection, Yangzhou University, 48 wenhui eastroad, Yangzhou, Jiangsu 225009 China
| | - Xuehao Chen
- Department of horticulture, School of Horticulture and Plant Protection, Yangzhou University, 48 wenhui eastroad, Yangzhou, Jiangsu 225009 China
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297
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Wang F, Chen ZH, Shabala S. Hypoxia Sensing in Plants: On a Quest for Ion Channels as Putative Oxygen Sensors. PLANT & CELL PHYSIOLOGY 2017; 58:1126-1142. [PMID: 28838128 DOI: 10.1093/pcp/pcx079] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2017] [Accepted: 05/22/2017] [Indexed: 05/18/2023]
Abstract
Over 17 million km2 of land is affected by soil flooding every year, resulting in substantial yield losses and jeopardizing food security across the globe. A key step in resolving this problem and creating stress-tolerant cultivars is an understanding of the mechanisms by which plants sense low-oxygen stress. In this work, we review the current knowledge about the oxygen-sensing and signaling pathway in mammalian and plant systems and postulate the potential role of ion channels as putative oxygen sensors in plant roots. We first discuss the definition and requirements for the oxygen sensor and the difference between sensing and signaling. We then summarize the literature and identify several known candidates for oxygen sensing in the mammalian literature. This includes transient receptor potential (TRP) channels; K+-permeable channels (Kv, BK and TASK); Ca2+ channels (RyR and TPC); and various chemo- and reactive oxygen species (ROS)-dependent oxygen sensors. Identified key oxygen-sensing domains (PAS, GCS, GAF and PHD) in mammalian systems are used to predict the potential plant counterparts in Arabidopsis. Finally, the sequences of known mammalian ion channels with reported roles in oxygen sensing were employed to BLAST the Arabidopsis genome for the candidate genes. Several plasma membrane and tonoplast ion channels (such as TPC, AKT and KCO) and oxygen domain-containing proteins with predicted oxygen-sensing ability were identified and discussed. We propose a testable model for potential roles of ion channels in plant hypoxia sensing.
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Affiliation(s)
- Feifei Wang
- School of Land and Food, University of Tasmania, Hobart, Tasmania 7001, Australia
| | - Zhong-Hua Chen
- School of Science and Health, Hawkesbury Institute for the Environment, Western Sydney University, Penrith, NSW, 2751, Australia
| | - Sergey Shabala
- School of Land and Food, University of Tasmania, Hobart, Tasmania 7001, Australia
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298
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Norby RJ, Iversen CM. Introduction to a Virtual Issue on root traits. THE NEW PHYTOLOGIST 2017; 215:5-8. [PMID: 28560788 DOI: 10.1111/nph.14522] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Affiliation(s)
- Richard J Norby
- Environmental Sciences Division and Climate Change Science Institute, Oak Ridge National Laboratory, Oak Ridge, TN, 37830-6301, USA
| | - Colleen M Iversen
- Environmental Sciences Division and Climate Change Science Institute, Oak Ridge National Laboratory, Oak Ridge, TN, 37830-6301, USA
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299
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Xeromorphic traits help to maintain photosynthesis in the perhumid climate of a Taiwanese cloud forest. Oecologia 2017; 184:609-621. [DOI: 10.1007/s00442-017-3894-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2016] [Accepted: 06/05/2017] [Indexed: 11/27/2022]
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300
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Sasidharan R, Bailey-Serres J, Ashikari M, Atwell BJ, Colmer TD, Fagerstedt K, Fukao T, Geigenberger P, Hebelstrup KH, Hill RD, Holdsworth MJ, Ismail AM, Licausi F, Mustroph A, Nakazono M, Pedersen O, Perata P, Sauter M, Shih MC, Sorrell BK, Striker GG, van Dongen JT, Whelan J, Xiao S, Visser EJW, Voesenek LACJ. Community recommendations on terminology and procedures used in flooding and low oxygen stress research. THE NEW PHYTOLOGIST 2017; 214:1403-1407. [PMID: 28277605 DOI: 10.1111/nph.14519] [Citation(s) in RCA: 86] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Affiliation(s)
- Rashmi Sasidharan
- Institute of Environmental Biology, Utrecht University, Padualaan 8, Utrecht, 3584CH, the Netherlands
| | - Julia Bailey-Serres
- Institute of Environmental Biology, Utrecht University, Padualaan 8, Utrecht, 3584CH, the Netherlands
- Center for Plant Cell Biology, Department of Botany and Plant Science, University of California, Riverside, CA, 92521-0124, USA
| | - Motoyuki Ashikari
- Bioscience and Biotechnology Center, Nagoya University, Chikusa, Nagoya, Aichi, 464-8601, Japan
| | - Brian J Atwell
- Department of Biological Sciences, Faculty of Science and Engineering, Macquarie University, Sydney, NSW, 2109, Australia
| | - Timothy D Colmer
- UWA School of Agriculture and Environment, The University of Western Australia, 35 Stirling Highway, Crawley, WA, 6009, Australia
| | - Kurt Fagerstedt
- Department of Biosciences, Viikki Plant Science Center, Helsinki University, PO Box 65, Helsinki, FI-00014, Finland
| | - Takeshi Fukao
- Department of Crop and Soil Environmental Sciences, Translational Plant Science Program, Fralin Life Science Institute, Virginia Tech, Blacksburg, VA, 24061, USA
| | - Peter Geigenberger
- Department of Biol 1, Ludwig Maximilian University of Munich, Grosshaderner Str 2-4, Martinsried, Planegg, Munich, D-82152, Germany
| | - Kim H Hebelstrup
- Department of Molecular Biology and Genetics, Aarhus University, Flakkebjerg, Slagelse, 4200, Denmark
| | - Robert D Hill
- Department of Plant Science, University of Manitoba, Winnipeg, MB, R3T 2N2, Canada
| | - Michael J Holdsworth
- Plant and Crop Sciences Division, School of Biosciences, University of Nottingham, Nottingham, LE12 5RD, UK
| | - Abdelbagi M Ismail
- International Rice Research Institute, Los Banõs, Laguna, 4031, Philippines
| | - Francesco Licausi
- PlantLab, Institute of Life Sciences, Scuola Superiore Sant'Anna, Via Mariscoglio 34, Pisa, 56124, Italy
| | - Angelika Mustroph
- Plant Physiology, University Bayreuth, Universitaetsstr. 30, Bayreuth, 95440, Germany
| | - Mikio Nakazono
- Graduate School of Bioagricultural Sciences, Nagoya University, Chikusa, Nagoya, 464-8601, Japan
| | - Ole Pedersen
- Freshwater Biological Laboratory, Department of Biology, University of Copenhagen, Universitetsparken 4, 3rd floor, Copenhagen, 2100, Denmark
| | - Pierdomenico Perata
- PlantLab, Institute of Life Sciences, Scuola Superiore Sant'Anna, Via Mariscoglio 34, Pisa, 56124, Italy
| | - Margret Sauter
- Plant Developmental Biology and Plant Physiology, Kiel University, Kiel, 24118, Germany
| | - Ming-Che Shih
- Agricultural Biotechnology Research Center, Academia Sinica, 115, Taipei, Taiwan
| | - Brian K Sorrell
- Department of Bioscience, Aarhus University, Aarhus, 8000, Denmark
| | - Gustavo G Striker
- IFEVA, Facultad de Agronomía, Universidad de Buenos Aires, CONICET, Av. San Martin 4453, Buenos Aires, Argentina
| | | | - James Whelan
- Department of Animal, Plant and Soil Science, School of Life Science, Australian Research Council Center of Excellence in Plant Energy Biology, La Trobe University, Bundoora, VIC, 3086, Australia
| | - Shi Xiao
- State Key Laboratory of Biocontrol and Guangdong Provincial Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat-sen University, Guangzhou, 510275, China
| | - Eric J W Visser
- Department of Experimental Plant Ecology, Institute for Water and Wetland Research, Radboud University, Heyendaalseweg 135, 6525 AJ, Nijmegen, the Netherlands
| | - Laurentius A C J Voesenek
- Institute of Environmental Biology, Utrecht University, Padualaan 8, Utrecht, 3584CH, the Netherlands
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