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Wei W, Ju J, Zhang X, Ling P, Luo J, Li Y, Xu W, Su J, Zhang X, Wang C. GhBRX.1, GhBRX.2, and GhBRX4.3 improve resistance to salt and cold stress in upland cotton. FRONTIERS IN PLANT SCIENCE 2024; 15:1353365. [PMID: 38405586 PMCID: PMC10884310 DOI: 10.3389/fpls.2024.1353365] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/10/2023] [Accepted: 01/23/2024] [Indexed: 02/27/2024]
Abstract
Introduction Abiotic stress during growth readily reduces cotton crop yield. The different survival tactics of plants include the activation of numerous stress response genes, such as BREVIS RADIX (BRX). Methods In this study, the BRX gene family of upland cotton was identified and analyzed by bioinformatics method, three salt-tolerant and cold-resistant GhBRX genes were screened. The expression of GhBRX.1, GhBRX.2 and GhBRXL4.3 in upland cotton was silenced by virus-induced gene silencing (VIGS) technique. The physiological and biochemical indexes of plants and the expression of related stress-response genes were detected before and after gene silencing. The effects of GhBRX.1, GhBRX.2 and GhBRXL4.3 on salt and cold resistance of upland cotton were further verified. Results and discussion We discovered 12, 6, and 6 BRX genes in Gossypium hirsutum, Gossypium raimondii and Gossypium arboreum, respectively. Chromosomal localization indicated that the retention and loss of GhBRX genes on homologous chromosomes did not have a clear preference for the subgenomes. Collinearity analysis suggested that segmental duplications were the main force for BRX gene amplification. The upland cotton genes GhBRX.1, GhBRX.2 and GhBRXL4.3 are highly expressed in roots, and GhBRXL4.3 is also strongly expressed in the pistil. Transcriptome data and qRT‒PCR validation showed that abiotic stress strongly induced GhBRX.1, GhBRX.2 and GhBRXL4.3. Under salt stress and low-temperature stress conditions, the activities of superoxide dismutase (SOD), peroxidase (POD) and catalase (CAT) and the content of soluble sugar and chlorophyll decreased in GhBRX.1-, GhBRX.2- and GhBRXL4.3-silenced cotton plants compared with those in the control (TRV: 00). Moreover, GhBRX.1-, GhBRX.2- and GhBRXL4.3-silenced cotton plants exhibited greater malondialdehyde (MDA) levels than did the control plants. Moreover, the expression of stress marker genes (GhSOS1, GhSOS2, GhNHX1, GhCIPK6, GhBIN2, GhSnRK2.6, GhHDT4D, GhCBF1 and GhPP2C) decreased significantly in the three target genes of silenced plants following exposure to stress. These results imply that the GhBRX.1, GhBRX.2 and GhBRXL4.3 genes may be regulators of salt stress and low-temperature stress responses in upland cotton.
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Affiliation(s)
- Wei Wei
- State Key Laboratory of Aridland Crop Science, College of Life Science and Technology, Gansu Agricultural University, Lanzhou, China
| | - Jisheng Ju
- State Key Laboratory of Aridland Crop Science, College of Life Science and Technology, Gansu Agricultural University, Lanzhou, China
| | - Xueli Zhang
- State Key Laboratory of Aridland Crop Science, College of Life Science and Technology, Gansu Agricultural University, Lanzhou, China
| | - Pingjie Ling
- State Key Laboratory of Aridland Crop Science, College of Life Science and Technology, Gansu Agricultural University, Lanzhou, China
| | - Jin Luo
- State Key Laboratory of Aridland Crop Science, College of Life Science and Technology, Gansu Agricultural University, Lanzhou, China
| | - Ying Li
- State Key Laboratory of Aridland Crop Science, College of Life Science and Technology, Gansu Agricultural University, Lanzhou, China
| | - Wenjuan Xu
- State Key Laboratory of Aridland Crop Science, College of Life Science and Technology, Gansu Agricultural University, Lanzhou, China
| | - Junji Su
- State Key Laboratory of Aridland Crop Science, College of Life Science and Technology, Gansu Agricultural University, Lanzhou, China
- Center for Western Agricultural Research, Chinese Academy of Agricultural Sciences (CAAS), Changji, China
| | - Xianliang Zhang
- Center for Western Agricultural Research, Chinese Academy of Agricultural Sciences (CAAS), Changji, China
- Institute of Cotton Research, State Key Laboratory of Cotton Biology, Chinese Academy of Agricultural Sciences (CAAS), Anyang, China
| | - Caixiang Wang
- State Key Laboratory of Aridland Crop Science, College of Life Science and Technology, Gansu Agricultural University, Lanzhou, China
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Menon-Martínez FE, Grimoldi AA, Striker GG, Di Bella CE. Changes in morphological traits associated with waterlogging, salinity and saline waterlogging in Festuca arundinacea. FUNCTIONAL PLANT BIOLOGY : FPB 2024; 51:NULL. [PMID: 38035377 DOI: 10.1071/fp23140] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2023] [Accepted: 11/09/2023] [Indexed: 12/02/2023]
Abstract
Rising incidences of waterlogging and salinity, particularly in extensive livestock farming areas, pose increasing challenges to plant growth. This study investigated the morphological growth responses and tolerance of 39 Festuca arundinacea accessions to these stresses, with tolerance quantified by the relative growth rate under stress versus control conditions. Notably, more productive accessions under normal conditions also showed greater stress tolerance. Waterlogging was generally well-tolerated (89-113% of control relative growth rate), without significantly altering growth morphological components as increases in specific leaf area were offset by reductions in leaf weight ratio, maintaining stable leaf area ratios. Conversely, salinity and combined saline waterlogging significantly reduced relative growth rate (56-94% of control), with a substantial variation among accessions. A decrease in specific leaf area, suggestive of thicker leaves, correlated with higher tolerance to salinity and saline waterlogging (r =0.63). In summary, F. arundinacea displays diverse tolerance to these stresses, warranting further study into the adaptive mechanisms. Specific leaf area emerges as a potential selection marker for breeding programs targeting saline and waterlogging tolerance.
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Affiliation(s)
- Federico Emanuel Menon-Martínez
- IFEVA, Universidad de Buenos Aires, CONICET, Facultad de Agronomía, Av. San Martín 4453, Buenos Aires C1417DSE, Argentina; and Cátedra de Forrajicultura, Departamento de Producción Animal, Facultad de Agronomía, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Agustín Alberto Grimoldi
- IFEVA, Universidad de Buenos Aires, CONICET, Facultad de Agronomía, Av. San Martín 4453, Buenos Aires C1417DSE, Argentina; and Cátedra de Forrajicultura, Departamento de Producción Animal, Facultad de Agronomía, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Gustavo Gabriel Striker
- IFEVA, Universidad de Buenos Aires, CONICET, Facultad de Agronomía, Av. San Martín 4453, Buenos Aires C1417DSE, Argentina; and Cátedra de Fisiología Vegetal, Departamento Biología Aplicada y Alimentos, Facultad de Agronomía, Universidad de Buenos Aires, Buenos Aires, Argentina; and School of Agriculture and Environment, Faculty of Science, The University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia
| | - Carla Estefania Di Bella
- IFEVA, Universidad de Buenos Aires, CONICET, Facultad de Agronomía, Av. San Martín 4453, Buenos Aires C1417DSE, Argentina; and Cátedra de Forrajicultura, Departamento de Producción Animal, Facultad de Agronomía, Universidad de Buenos Aires, Buenos Aires, Argentina
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Martins TS, Da-Silva CJ, Shabala S, Striker GG, Carvalho IR, de Oliveira ACB, do Amarante L. Understanding plant responses to saline waterlogging: insights from halophytes and implications for crop tolerance. PLANTA 2023; 259:24. [PMID: 38108902 DOI: 10.1007/s00425-023-04275-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2023] [Accepted: 10/30/2023] [Indexed: 12/19/2023]
Abstract
MAIN CONCLUSION Saline and wet environments stress most plants, reducing growth and yield. Halophytes adapt with ion regulation, energy maintenance, and antioxidants. Understanding these mechanisms aids in breeding resilient crops for climate change. Waterlogging and salinity are two abiotic stresses that have a major negative impact on crop growth and yield. These conditions cause osmotic, ionic, and oxidative stress, as well as energy deprivation, thus impairing plant growth and development. Although few crop species can tolerate the combination of salinity and waterlogging, halophytes are plant species that exhibit high tolerance to these conditions due to their morphological, anatomical, and metabolic adaptations. In this review, we discuss the main mechanisms employed by plants exposed to saline waterlogging, intending to understand the mechanistic basis of their ion homeostasis. We summarize the knowledge of transporters and channels involved in ion accumulation and exclusion, and how they are modulated to prevent cytosolic toxicity. In addition, we discuss how reactive oxygen species production and cell signaling enhance ion transport and aerenchyma formation, and how plants exposed to saline waterlogging can control oxidative stress. We also address the morphological and anatomical modifications that plants undergo in response to combined stress, including aerenchyma formation, root porosity, and other traits that help to mitigate stress. Furthermore, we discuss the peculiarities of halophyte plants and their features that can be leveraged to improve crop yields in areas prone to saline waterlogging. This review provides valuable insights into the mechanisms of plant adaptation to saline waterlogging thus paving the path for future research on crop breeding and management strategies.
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Affiliation(s)
- Tamires S Martins
- Departamento de Botânica, Universidade Federal de Pelotas, Capão Do Leão, Brazil.
- Laboratory of Crop Physiology (LCroP), Department of Plant Biology, Institute of Biology, University of Campinas (UNICAMP), Campinas, SP, Brazil.
| | - Cristiane J Da-Silva
- Departamento de Botânica, Universidade Federal de Pelotas, Capão Do Leão, Brazil.
- Department of Horticultural Science, NC State University, Raleigh, USA.
| | - Sergey Shabala
- School of Biological Science, University of Western Australia, Perth, Australia
- International Research Centre for Environmental Membrane Biology, Foshan University, Foshan, China
- Tasmanian Institute of Agriculture, University of Tasmania, Hobart, Australia
| | - Gustavo G Striker
- IFEVA, Universidad de Buenos Aires, CONICET, Facultad de Agronomía, Buenos Aires, Argentina
- School of Agriculture and Environment, Faculty of Science, The University of Western Australia, Crawley, Australia
| | - Ivan R Carvalho
- Departamento de Estudos Agrários, Universidade Regional do Noroeste do Estado do Rio Grande do Sul, Ijuí, Brazil
| | | | - Luciano do Amarante
- Departamento de Botânica, Universidade Federal de Pelotas, Capão Do Leão, Brazil
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PopW improves salt stress tolerance of red clover (Trifolium pratense L.) via activating phytohormones and salinity related genes. Biologia (Bratisl) 2022. [DOI: 10.1007/s11756-022-01280-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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Nature-Based Solutions for the Sustainable Management of Urban Soils and Quality of Life Improvements. LAND 2022. [DOI: 10.3390/land11040569] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The rehabilitation and restoration of land-based ecosystems is a key strategy for recovering the services (goods and resources) ecosystems offer to humankind. The use of nature-based solutions (NBSs) to restore degraded soil functions and improve soil quality can be a sustainable and successful strategy to enhance their ecosystem services by working together with the forces of nature and using well-designed measures that require less maintenance, are more cost-effective, and if constructed in the right way may even be more effective over long periods because nature’s forces can increase the structural efficiency. In this study, we aimed to (i) evaluate the bioremediation capacity of some grasses and their suitability for lawn planting in settlements (in residential and non-residential areas, along roads, etc.) and (ii) propose technological solutions for their practical application in an urban environment. Emphasis was placed on the potential of some perennial grasses and their application for the bioremediation of polluted urban soils, including perennial ryegrass (Lolium perenne L.), crested wheatgrass (Agropyron cristatum L.), tall fescue (Festuca arundinacea Schreb), and bird’s foot trefoil (Lotus corniculatus L.). A case study from the city of Plovdiv (Bulgaria) is presented, together with an effective technological solution for the establishment of urban lawns and the roadside green buffer patches.
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Antonelli CJ, Calzadilla PI, Campestre MP, Escaray FJ, Ruiz OA. Contrasting response of two Lotus corniculatus L. accessions to combined waterlogging-saline stress. PLANT BIOLOGY (STUTTGART, GERMANY) 2021; 23:363-374. [PMID: 33190297 DOI: 10.1111/plb.13216] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2020] [Accepted: 11/02/2020] [Indexed: 06/11/2023]
Abstract
Waterlogging and salinity impair crop growth and productivity worldwide, with their combined effects being larger than the additive effects of the two stresses separately. Here, a common forage tetraploid Lotus corniculatus (cv. San Gabriel) and a diploid L. corniculatus accession, collected from a coastal area with high frequency of waterlogging-saline stress events, were evaluated for tolerance to waterlogging, salinity and these two stresses combined. We hypothesize that, due to its environmental niche, the diploid accession would show better adaptation to combined waterlogging-saline stress compared to the tetraploid L. corniculatus. Plants were evaluated under control conditions, waterlogging, salinity and a combined waterlogging-saline treatment for 33 days. Shoot and root growth were assessed, together with chlorophyll fluorescence and gas exchange measurements. Results showed that salinity and waterlogging effects were more severe for the tetraploid accession, with a larger effect being observed under the combined stress condition. Concentrations of Na+ , Cl- and K+ were measured in apical and basal leaves, and in roots. A larger accumulation of Na+ and Cl- was observed under both saline and combined stress treatments for the tetraploid L. corniculatus, for which ion toxicity effects were evident. The expression of CLC gene, coding for a Cl- transporter, was only increased in diploid L. corniculatus plants in response to the combined stress condition, suggesting that ion compartmentalization mechanisms were induced in this accession. Thus, this recently characterized L. corniculatus could be used for the introduction of new tolerance traits in other Lotus species used as forage.
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Affiliation(s)
- C J Antonelli
- Instituto Tecnológico de Chascomús (INTECH), UNSAM-CONICET, Chascomús, Bs As, Argentina
| | - P I Calzadilla
- Instituto Tecnológico de Chascomús (INTECH), UNSAM-CONICET, Chascomús, Bs As, Argentina
| | - M P Campestre
- Instituto Tecnológico de Chascomús (INTECH), UNSAM-CONICET, Chascomús, Bs As, Argentina
| | - F J Escaray
- Instituto Tecnológico de Chascomús (INTECH), UNSAM-CONICET, Chascomús, Bs As, Argentina
| | - O A Ruiz
- Instituto Tecnológico de Chascomús (INTECH), UNSAM-CONICET, Chascomús, Bs As, Argentina
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Escaray FJ, Antonelli CJ, Copello GJ, Puig S, Peñarrubia L, Ruiz OA, Perea-García A. Characterization of the Copper Transporters from Lotus spp. and Their Involvement under Flooding Conditions. Int J Mol Sci 2019; 20:E3136. [PMID: 31252630 PMCID: PMC6651048 DOI: 10.3390/ijms20133136] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2019] [Revised: 06/20/2019] [Accepted: 06/25/2019] [Indexed: 02/07/2023] Open
Abstract
Forage legumes are an important livestock nutritional resource, which includes essential metals, such as copper. Particularly, the high prevalence of hypocuprosis causes important economic losses to Argentinian cattle agrosystems. Copper deficiency in cattle is partially due to its low content in forage produced by natural grassland, and is exacerbated by flooding conditions. Previous results indicated that incorporation of Lotus spp. into natural grassland increases forage nutritional quality, including higher copper levels. However, the biological processes and molecular mechanisms involved in copper uptake by Lotus spp. remain poorly understood. Here, we identify four genes that encode putative members of the Lotus copper transporter family, denoted COPT in higher plants. A heterologous functional complementation assay of the Saccharomyces cerevisiae ctr1∆ctr3∆ strain, which lacks the corresponding yeast copper transporters, with the putative Lotus COPT proteins shows a partial rescue of the yeast phenotypes in restrictive media. Under partial submergence conditions, the copper content of L. japonicus plants decreases and the expression of two Lotus COPT genes is induced. These results strongly suggest that the Lotus COPT proteins identified in this work function in copper uptake. In addition, the fact that environmental conditions affect the expression of certain COPT genes supports their involvement in adaptive mechanisms and envisages putative biotechnological strategies to improve cattle copper nutrition.
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Affiliation(s)
- Francisco J Escaray
- Instituto Tecnológico de Chascomús (INTECh), UNSAM/CONICET, Avda. Intendente Marino Km. 8.2, Chascomús, Buenos Aires 7130, Argentina.
- Departament de Bioquímica i Biologia Molecular, Estructura de Recerca Interdisciplinar en Biotecnologiaia i Biomedicina (ERI BIOTECMED), Universitat de València. Burjassot, 46100 Valencia, Spain.
| | - Cristian J Antonelli
- Instituto Tecnológico de Chascomús (INTECh), UNSAM/CONICET, Avda. Intendente Marino Km. 8.2, Chascomús, Buenos Aires 7130, Argentina.
- Instituto de Fisiología Vegetal (INFIVE), Universidad Nacional de La Plata (UNLP), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), La Plata, Buenos Aires 1900, Argentina.
| | - Guillermo J Copello
- Instituto de Quı́mica y Metabolismo del Fármaco (IQUIMEFA), Universidad de Buenos Aires (UBA), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Ciudad Autónoma de Buenos Aires, Buenos Aires C113AAD, Argentina.
- Departamento de Química Analítica y Fisicoquímica, Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires (UBA), Ciudad Autónoma de Buenos Aires, Buenos Aires C113AAD, Argentina.
| | - Sergi Puig
- Instituto de Agroquímica y Tecnología de los Alimentos, Centro Superior de Investigaciones Científicas, IATA-CSIC, Paterna, 46980 Valencia, Spain.
| | - Lola Peñarrubia
- Departament de Bioquímica i Biologia Molecular, Estructura de Recerca Interdisciplinar en Biotecnologiaia i Biomedicina (ERI BIOTECMED), Universitat de València. Burjassot, 46100 Valencia, Spain.
| | - Oscar A Ruiz
- Instituto Tecnológico de Chascomús (INTECh), UNSAM/CONICET, Avda. Intendente Marino Km. 8.2, Chascomús, Buenos Aires 7130, Argentina.
| | - Ana Perea-García
- Instituto Tecnológico de Chascomús (INTECh), UNSAM/CONICET, Avda. Intendente Marino Km. 8.2, Chascomús, Buenos Aires 7130, Argentina.
- Instituto de Agroquímica y Tecnología de los Alimentos, Centro Superior de Investigaciones Científicas, IATA-CSIC, Paterna, 46980 Valencia, Spain.
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Ma Y, Shabala S, Li C, Liu C, Zhang W, Zhou M. Quantitative Trait Loci for Salinity Tolerance Identified under Drained and Waterlogged Conditions and Their Association with Flowering Time in Barley (Hordeum vulgare. L). PLoS One 2015; 10:e0134822. [PMID: 26247774 PMCID: PMC4527667 DOI: 10.1371/journal.pone.0134822] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2015] [Accepted: 07/14/2015] [Indexed: 12/21/2022] Open
Abstract
INTRODUCTION Salinity is one of the major abiotic stresses affecting crop production via adverse effects of osmotic stress, specific ion toxicity, and stress-related nutritional disorders. Detrimental effects of salinity are also often exacerbated by low oxygen availability when plants are grown under waterlogged conditions. Developing salinity-tolerant varieties is critical to overcome these problems, and molecular marker assisted selection can make breeding programs more effective. METHODS In this study, a double haploid (DH) population consisting of 175 lines, derived from a cross between a Chinese barley variety Yangsimai 1 (YSM1) and an Australian malting barley variety Gairdner, was used to construct a high density molecular map which contained more than 8,000 Diversity Arrays Technology (DArT) markers and single nucleotide polymorphism (SNP) markers. Salinity tolerance of parental and DH lines was evaluated under drained (SalinityD) and waterlogged (SalinityW) conditions at two different sowing times. RESULTS Three quantitative trait loci (QTL) located on chromosome 1H, single QTL located on chromosomes 1H, 2H, 4H, 5H and 7H, were identified to be responsible for salinity tolerance under different environments. Waterlogging stress, daylight length and temperature showed significant effects on barley salinity tolerance. The QTL for salinity tolerance mapped on chromosomes 4H and 7H, QSlwd.YG.4H, QSlwd.YG.7H and QSlww.YG.7H were only identified in winter trials, while the QTL on chromosome 2H QSlsd.YG.2H and QSlsw.YG.2H were only detected in summer trials. Genes associated with flowering time were found to pose significant effects on the salinity QTL mapped on chromosomes 2H and 5H in summer trials. Given the fact that the QTL for salinity tolerance QSlsd.YG.1H and QSlww.YG.1H-1 reported here have never been considered in the literature, this warrants further investigation and evaluation for suitability to be used in breeding programs.
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Affiliation(s)
- Yanling Ma
- Tasmanian Institute of Agriculture and School of Land and Food, University of Tasmania, P.O. Box 46, Kings Meadows, TAS, 7249, Australia
| | - Sergey Shabala
- Tasmanian Institute of Agriculture and School of Land and Food, University of Tasmania, P.O. Box 46, Kings Meadows, TAS, 7249, Australia
| | - Chengdao Li
- Western Barley Genetics Alliance, Murdoch University, 90 South Street, Murdoch, WA, 6150, Australia
| | - Chunji Liu
- CSIRO Plant Industry, 306 Carmody Road, St. Lucia, QLD, 4067, Australia
| | - Wenying Zhang
- School of Agriculture, Yangtze University, Jingzhou, 434025, P.R. China
| | - Meixue Zhou
- Tasmanian Institute of Agriculture and School of Land and Food, University of Tasmania, P.O. Box 46, Kings Meadows, TAS, 7249, Australia
- School of Agriculture, Yangtze University, Jingzhou, 434025, P.R. China
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Mishra S, Alavilli H, Lee BH, Panda SK, Sahoo L. Cloning and functional characterization of a vacuolar Na+/H+ antiporter gene from mungbean (VrNHX1) and its ectopic expression enhanced salt tolerance in Arabidopsis thaliana. PLoS One 2014; 9:e106678. [PMID: 25350285 PMCID: PMC4211658 DOI: 10.1371/journal.pone.0106678] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2014] [Accepted: 07/02/2014] [Indexed: 12/04/2022] Open
Abstract
Plant vacuolar NHX exchangers play a significant role in adaption to salt stress by compartmentalizing excess cytosolic Na+ into vacuoles and maintaining cellular homeostasis and ionic equilibrium. We cloned an orthologue of the vacuolar Na+/H+ antiporter gene, VrNHX1 from mungbean (Vigna radiata), an important Asiatic grain legume. The VrNHX1 (Genbank Accession number JN656211.1) contains 2095 nucleotides with an open reading frame of 1629 nucleotides encoding a predicted protein of 542 amino acids with a deduced molecular mass of 59.6 kDa. The consensus amiloride binding motif (84LFFIYLLPPI93) was observed in the third putative transmembrane domain of VrNHX1. Bioinformatic and phylogenetic analysis clearly suggested that VrNHX1 had high similarity to those of orthologs belonging to Class-I clade of plant NHX exchangers in leguminous crops. VrNHX1 could be strongly induced by salt stress in mungbean as the expression in roots significantly increased in presence of 200 mM NaCl with concomitant accumulation of total [Na+]. Induction of VrNHX1 was also observed under cold and dehydration stress, indicating a possible cross talk between various abiotic stresses. Heterologous expression in salt sensitive yeast mutant AXT3 complemented for the loss of yeast vacuolar NHX1 under NaCl, KCl and LiCl stress indicating that VrNHX1 was the orthologue of ScNHX1. Further, AXT3 cells expressing VrNHX1 survived under low pH environment and displayed vacuolar alkalinization analyzed using pH sensitive fluorescent dye BCECF-AM. The constitutive and stress inducible expression of VrNHX1 resulted in enhanced salt tolerance in transgenic Arabidopsis thaliana lines. Our work suggested that VrNHX1 was a salt tolerance determinant in mungbean.
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Affiliation(s)
- Sagarika Mishra
- Department of Biotechnology, Indian Institute of Technology Guwahati, Guwahati, India
| | | | - Byeong-ha Lee
- Department of Life Science, Sogang University, Mapo-gu, Seoul, Korea
| | - Sanjib Kumar Panda
- Department of Life Sciences and Bioinformatics, Assam University, Silchar, India
- Department of Biochemistry & Molecular Biology, Noble Research Centre, Oklahoma State University, Stillwater, OK, United States of America
| | - Lingaraj Sahoo
- Department of Biotechnology, Indian Institute of Technology Guwahati, Guwahati, India
- * E-mail:
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Escaray FJ, Menendez AB, Gárriz A, Pieckenstain FL, Estrella MJ, Castagno LN, Carrasco P, Sanjuán J, Ruiz OA. Ecological and agronomic importance of the plant genus Lotus. Its application in grassland sustainability and the amelioration of constrained and contaminated soils. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2012; 182:121-33. [PMID: 22118623 DOI: 10.1016/j.plantsci.2011.03.016] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2010] [Revised: 03/16/2011] [Accepted: 03/24/2011] [Indexed: 05/04/2023]
Abstract
The genus Lotus comprises around 100 annual and perennial species with worldwide distribution. The relevance of Lotus japonicus as a model plant has been recently demonstrated in numerous studies. In addition, some of the Lotus species show a great potential for adaptation to a number of abiotic stresses. Therefore, they are relevant components of grassland ecosystems in environmentally constrained areas of several South American countries and Australia, where they are used for livestock production. Also, the fact that the roots of these species form rhizobial and mycorrhizal associations makes the annual L. japonicus a suitable model plant for legumes, particularly in studies directed to recognize the mechanisms intervening in the tolerance to abiotic factors in the field, where these interactions occur. These properties justify the increased utilization of some Lotus species as a strategy for dunes revegetation and reclamation of heavy metal-contaminated or burned soils in Europe.
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Affiliation(s)
- Francisco J Escaray
- Instituto de Investigaciones Biotecnológicas-Instituto Tecnológico de Chascomús UNSAM/CONICET, 7130, Camino circunvalación laguna km 6, Chascomús, Argentina
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