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Balfagón D, Zandalinas SI, dos Reis de Oliveira T, Santa-Catarina C, Gómez-Cadenas A. Omics analyses in citrus reveal a possible role of RNA translation pathways and Unfolded Protein Response regulators in the tolerance to combined drought, high irradiance, and heat stress. HORTICULTURE RESEARCH 2023; 10:uhad107. [PMID: 37577403 PMCID: PMC10419850 DOI: 10.1093/hr/uhad107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/07/2023] [Accepted: 05/15/2023] [Indexed: 08/15/2023]
Abstract
Environmental changes derived from global warming and human activities increase the intensity and frequency of stressful conditions for plants. Multiple abiotic factors acting simultaneously enhance stress pressure and drastically reduce plant growth, yield, and survival. Stress combination causes a specific stress situation that induces a particular plant response different to the sum of responses to the individual stresses. Here, by comparing transcriptomic and proteomic profiles to different abiotic stress combinations in two citrus genotypes, Carrizo citrange (Citrus sinensis × Poncirus trifoliata) and Cleopatra mandarin (Citrus reshni), with contrasting tolerance to different abiotic stresses, we revealed key responses to the triple combination of heat stress, high irradiance and drought. The specific transcriptomic response to this stress combination in Carrizo was directed to regulate RNA metabolic pathways and translation processes, potentially conferring an advantage with respect to Cleopatra. In addition, we found endoplasmic reticulum stress response as common to all individual and combined stress conditions in both genotypes and identified the accumulation of specific groups of heat shock proteins (HSPs), such as small HSPs and HSP70s, and regulators of the unfolded protein response, BiP2 and PDIL2-2, as possible factors involved in citrus tolerance to triple stress combination. Taken together, our findings provide new insights into the acclimation process of citrus plants to multiple stress combination, necessary for increasing crop tolerance to the changing climatic conditions.
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Affiliation(s)
- Damián Balfagón
- Departamento de Biología, Bioquímica y Ciencias Naturales, Av. Sos Baynat s/n. Universitat Jaume I, 46520 Castelló de la Plana, Spain
| | - Sara I Zandalinas
- Departamento de Biología, Bioquímica y Ciencias Naturales, Av. Sos Baynat s/n. Universitat Jaume I, 46520 Castelló de la Plana, Spain
| | - Tadeu dos Reis de Oliveira
- Laboratório de Biologia Celular e Tecidual (LBCT), Centro de Biociências E Biotecnologia (CBB), Universidade Estadual Do Norte Fluminense Darcy Ribeiro (UENF), Av. Alberto Lamego 2000, Campos Dos Goytacazes, RJ, 28013-602, Brazil
| | - Claudete Santa-Catarina
- Laboratório de Biologia Celular e Tecidual (LBCT), Centro de Biociências E Biotecnologia (CBB), Universidade Estadual Do Norte Fluminense Darcy Ribeiro (UENF), Av. Alberto Lamego 2000, Campos Dos Goytacazes, RJ, 28013-602, Brazil
| | - Aurelio Gómez-Cadenas
- Departamento de Biología, Bioquímica y Ciencias Naturales, Av. Sos Baynat s/n. Universitat Jaume I, 46520 Castelló de la Plana, Spain
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Marker-Free Rice (Oryza sativa L. cv. IR 64) Overexpressing PDH45 Gene Confers Salinity Tolerance by Maintaining Photosynthesis and Antioxidant Machinery. Antioxidants (Basel) 2022; 11:antiox11040770. [PMID: 35453455 PMCID: PMC9025255 DOI: 10.3390/antiox11040770] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2022] [Revised: 04/01/2022] [Accepted: 04/05/2022] [Indexed: 11/16/2022] Open
Abstract
Helicases function as key enzymes in salinity stress tolerance, and the role and function of PDH45 (pea DNA helicase 45) in stress tolerance have been reported in different crops with selectable markers, raising public and regulatory concerns. In the present study, we developed five lines of marker-free PDH45-overexpressing transgenic lines of rice (Oryza sativa L. cv. IR64). The overexpression of PDH45 driven by CaMV35S promoter in transgenic rice conferred high salinity (200 mM NaCl) tolerance in the T1 generation. Molecular attributes such as PCR, RT-PCR, and Southern and Western blot analyses confirmed stable integration and expression of the PDH45 gene in the PDH45-overexpressing lines. We observed higher endogenous levels of sugars (glucose and fructose) and hormones (GA, zeatin, and IAA) in the transgenic lines in comparison to control plants (empty vector (VC) and wild type (WT)) under salt treatments. Furthermore, photosynthetic characteristics such as net photosynthetic rate (Pn), stomatal conductance (gs), intercellular CO2 (Ci), and chlorophyll (Chl) content were significantly higher in transgenic lines under salinity stress as compared to control plants. However, the maximum primary photochemical efficiency of PSII, as an estimated from variable to maximum chlorophyll a fluorescence (Fv/Fm), was identical in the transgenics to that in the control plants. The activities of antioxidant enzymes, such as catalase (CAT), ascorbate peroxidase (APX), glutathione reductase (GR), and guaiacol peroxidase (GPX), were significantly higher in transgenic lines in comparison to control plants, which helped in keeping the oxidative stress burden (MDA and H2O2) lesser on transgenic lines, thus protecting the growth and photosynthetic efficiency of the plants. Overall, the present research reports the development of marker-free PDH45-overexpressing transgenic lines for salt tolerance that can potentially avoid public and biosafety concerns and facilitate the commercialization of genetically engineered crop plants.
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Singh D, Chaudhary P, Taunk J, Singh CK, Singh D, Tomar RSS, Aski M, Konjengbam NS, Raje RS, Singh S, Sengar RS, Yadav RK, Pal M. Fab Advances in Fabaceae for Abiotic Stress Resilience: From 'Omics' to Artificial Intelligence. Int J Mol Sci 2021; 22:10535. [PMID: 34638885 PMCID: PMC8509049 DOI: 10.3390/ijms221910535] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Revised: 09/17/2021] [Accepted: 09/23/2021] [Indexed: 11/16/2022] Open
Abstract
Legumes are a better source of proteins and are richer in diverse micronutrients over the nutritional profile of widely consumed cereals. However, when exposed to a diverse range of abiotic stresses, their overall productivity and quality are hugely impacted. Our limited understanding of genetic determinants and novel variants associated with the abiotic stress response in food legume crops restricts its amelioration. Therefore, it is imperative to understand different molecular approaches in food legume crops that can be utilized in crop improvement programs to minimize the economic loss. 'Omics'-based molecular breeding provides better opportunities over conventional breeding for diversifying the natural germplasm together with improving yield and quality parameters. Due to molecular advancements, the technique is now equipped with novel 'omics' approaches such as ionomics, epigenomics, fluxomics, RNomics, glycomics, glycoproteomics, phosphoproteomics, lipidomics, regulomics, and secretomics. Pan-omics-which utilizes the molecular bases of the stress response to identify genes (genomics), mRNAs (transcriptomics), proteins (proteomics), and biomolecules (metabolomics) associated with stress regulation-has been widely used for abiotic stress amelioration in food legume crops. Integration of pan-omics with novel omics approaches will fast-track legume breeding programs. Moreover, artificial intelligence (AI)-based algorithms can be utilized for simulating crop yield under changing environments, which can help in predicting the genetic gain beforehand. Application of machine learning (ML) in quantitative trait loci (QTL) mining will further help in determining the genetic determinants of abiotic stress tolerance in pulses.
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Affiliation(s)
- Dharmendra Singh
- Division of Genetics, ICAR-Indian Agricultural Research Institute, New Delhi 110012, India
| | - Priya Chaudhary
- Division of Genetics, ICAR-Indian Agricultural Research Institute, New Delhi 110012, India
| | - Jyoti Taunk
- Division of Plant Physiology, ICAR-Indian Agricultural Research Institute, New Delhi 110012, India
| | - Chandan Kumar Singh
- Division of Genetics, ICAR-Indian Agricultural Research Institute, New Delhi 110012, India
| | - Deepti Singh
- Department of Botany, Meerut College, Meerut 250001, India
| | - Ram Sewak Singh Tomar
- College of Horticulture and Forestry, Rani Lakshmi Bai Central Agricultural University, Jhansi 284003, India
| | - Muraleedhar Aski
- Division of Genetics, ICAR-Indian Agricultural Research Institute, New Delhi 110012, India
| | - Noren Singh Konjengbam
- College of Post Graduate Studies in Agricultural Sciences, Central Agricultural University, Imphal 793103, India
| | - Ranjeet Sharan Raje
- Division of Genetics, ICAR-Indian Agricultural Research Institute, New Delhi 110012, India
| | - Sanjay Singh
- ICAR- National Institute of Plant Biotechnology, LBS Centre, Pusa Campus, New Delhi 110012, India
| | - Rakesh Singh Sengar
- College of Biotechnology, Sardar Vallabh Bhai Patel Agricultural University, Meerut 250001, India
| | - Rajendra Kumar Yadav
- Department of Genetics and Plant Breeding, Chandra Shekhar Azad University of Agriculture and Technology, Kanpur 208002, India
| | - Madan Pal
- Division of Plant Physiology, ICAR-Indian Agricultural Research Institute, New Delhi 110012, India
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Tyagi V, Parihar V, Singh D, Kapoor S, Kapoor M. The DEAD-box RNA helicase eIF4A1 interacts with the SWI2/SNF2-related chromatin remodelling ATPase DDM1 in the moss Physcomitrella. BIOCHIMICA ET BIOPHYSICA ACTA-PROTEINS AND PROTEOMICS 2020; 1869:140592. [PMID: 33359411 DOI: 10.1016/j.bbapap.2020.140592] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 09/12/2020] [Revised: 12/17/2020] [Accepted: 12/18/2020] [Indexed: 12/27/2022]
Abstract
eIF4A is a DEAD box containing RNA helicase that plays crucial roles in regulating translation initiation, growth and abiotic stress tolerance in plants. It also functions as an ATP-dependent RNA binding protein to curb granule formation by limiting RNA-RNA interactions that promote RNA condensation and formation of ribonucleoprotein particles in vivo. Helicase activity of eIF4A is known to be dictated by its binding partners. Proteins interacting with eIF4A have been identified across land plants. In monocots a close link between eIF4A regulated processes and DNA methylation in epigenetic regulation of plant development is inferred from interaction between OseIF4A and the de novo methyltransferase OsDRM2 and loss-of-function studies of these genes in Oryza sativa and Brachypodium distachyon. In the moss Physcomitrella patens, eIF4A1 encoded by Pp3c6_1080V3.1 interacts with the heterogeneous nuclear ribonucleoprotein (hnRNP) PpLIF2L1, homolog of which in Arabidopsis regulates transcription of stress-responsive genes. In this study, using different protein-protein interaction methods, targeted gene knockout strategy and quantitative expression analysis we show genetic interaction between PpeIF4A1 and the putative nucleosome remodeler protein PpDDM1 and between PpDDM1 and PpLIF2L1 in vivo. Stress-induced co-expression of PpeIF4A1, PpDDM1 and PpLIF2L1, their roles in salt stress tolerance and differences in subnuclear distribution of PpLIF2L1 in ppeif4a1 cells in comparison to wild type suggest existence of a regulatory network comprising of RNA helicases, chromatin remodelling proteins and hnRNP active in stress-responsive biological processes in P. patens.
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Affiliation(s)
- Vidhi Tyagi
- University School of Biotechnology, Guru Gobind Singh Indraprastha University, Sector 16C, Dwarka, New Delhi 110078, India
| | - Vimala Parihar
- University School of Biotechnology, Guru Gobind Singh Indraprastha University, Sector 16C, Dwarka, New Delhi 110078, India
| | - Darshika Singh
- University School of Biotechnology, Guru Gobind Singh Indraprastha University, Sector 16C, Dwarka, New Delhi 110078, India
| | - Sanjay Kapoor
- Interdisciplinary Centre for Plant Genomics and Department of Plant Molecular Biology, University of Delhi, South Campus Benito Juarez Road, New Delhi 110021, India
| | - Meenu Kapoor
- University School of Biotechnology, Guru Gobind Singh Indraprastha University, Sector 16C, Dwarka, New Delhi 110078, India.
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The DEAD-box RNA helicase eIF4A regulates plant development and interacts with the hnRNP LIF2L1 in Physcomitrella patens. Mol Genet Genomics 2019; 295:373-389. [PMID: 31781862 DOI: 10.1007/s00438-019-01628-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2019] [Accepted: 11/20/2019] [Indexed: 12/26/2022]
Abstract
eIF4A is a RNA-stimulated ATPase and helicase. Besides its key role in regulating cap-dependent translation initiation in eukaryotes, it also performs specific functions in regulating cell cycle progression, plant growth and abiotic stress tolerance. Flowering plants encode three eIF4A paralogues, eIF4A1, eIF4A2 and eIF4A3 that share conserved sequence motifs but differ in functions. To date, however, no information is available on eIF4A in basal land plants. In this study we report that genome of the moss Physcomitrella patens encodes multiple eIF4A genes. The encoded proteins possess the highly conserved motifs characteristic of the DEAD box helicases. Spatial expression analysis shows these genes to be ubiquitously expressed in all tissue types with Pp3c6_1080V3.1 showing high expression in filamentous protonemata. Targeted deletion of conserved core motifs in Pp3c6_1080V3.1 slowed protonemata growth and resulted in dwarfing of leafy gametophores suggesting a role for Pp3c6_1080V3.1 in regulating cell division/elongation. Rapid and strong induction of Pp3c6_1080V3.1 under salt stress and slow recovery of knockout plants upon exposure to high salt further suggest Pp3c6_1080V3.1 to be involved in stress management in P. patens. Protein-protein interaction studies that show Pp3c6_1080V3.1 to interact with the Physcomitrella heterogenous ribonucleoprotein, LIF2L1, a transcriptional regulator of stress-responsive genes in Arabidopsis. The results presented in this study provide insight into evolutionary conserved functions of eIF4A and shed light on the novel link between eIF4A activities and stress mitigation pathways/RNA metabolic processes in P. patens.
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Nidumukkala S, Tayi L, Chittela RK, Vudem DR, Khareedu VR. DEAD box helicases as promising molecular tools for engineering abiotic stress tolerance in plants. Crit Rev Biotechnol 2019; 39:395-407. [DOI: 10.1080/07388551.2019.1566204] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
| | - Lavanya Tayi
- Centre for Plant Molecular Biology, Osmania University, Hyderabad, India
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Akpinar BA, Biyiklioglu S, Alptekin B, Havránková M, Vrána J, Doležel J, Distelfeld A, Hernandez P, Budak H. Chromosome-based survey sequencing reveals the genome organization of wild wheat progenitor Triticum dicoccoides. PLANT BIOTECHNOLOGY JOURNAL 2018; 16:2077-2087. [PMID: 29729062 PMCID: PMC6230948 DOI: 10.1111/pbi.12940] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/12/2018] [Revised: 04/11/2018] [Accepted: 04/20/2018] [Indexed: 05/20/2023]
Abstract
Wild emmer wheat (Triticum turgidum ssp. dicoccoides) is the progenitor of wheat. We performed chromosome-based survey sequencing of the 14 chromosomes, examining repetitive sequences, protein-coding genes, miRNA/target pairs and tRNA genes, as well as syntenic relationships with related grasses. We found considerable differences in the content and distribution of repetitive sequences between the A and B subgenomes. The gene contents of individual chromosomes varied widely, not necessarily correlating with chromosome size. We catalogued candidate agronomically important loci, along with new alleles and flanking sequences that can be used to design exome sequencing. Syntenic relationships and virtual gene orders revealed several small-scale evolutionary rearrangements, in addition to providing evidence for the 4AL-5AL-7BS translocation in wild emmer wheat. Chromosome-based sequence assemblies contained five novel miRNA families, among 59 families putatively encoded in the entire genome which provide insight into the domestication of wheat and an overview of the genome content and organization.
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Affiliation(s)
- Bala Ani Akpinar
- Department of Plant Sciences and Plant PathologyCereal Genomics LabMontana State UniversityBozemanMTUSA
| | - Sezgi Biyiklioglu
- Department of Plant Sciences and Plant PathologyCereal Genomics LabMontana State UniversityBozemanMTUSA
| | - Burcu Alptekin
- Department of Plant Sciences and Plant PathologyCereal Genomics LabMontana State UniversityBozemanMTUSA
| | - Miroslava Havránková
- Centre of the Region Haná for Biotechnological and Agricultural ResearchInstitute of Experimental BotanyOlomoucCzech Republic
| | - Jan Vrána
- Centre of the Region Haná for Biotechnological and Agricultural ResearchInstitute of Experimental BotanyOlomoucCzech Republic
| | - Jaroslav Doležel
- Centre of the Region Haná for Biotechnological and Agricultural ResearchInstitute of Experimental BotanyOlomoucCzech Republic
| | - Assaf Distelfeld
- Department of Molecular Biology and Ecology of PlantsFaculty of Life SciencesTel Aviv UniversityTel AvivIsrael
| | - Pilar Hernandez
- Instituto de Agricultura Sostenible (IAS)Consejo Superior de Investigaciones Científicas (CSIC)CordobaSpain
| | - The IWGSC
- International Wheat Genome Sequencing ConsortiumBethesdaMDUSA
| | - Hikmet Budak
- Department of Plant Sciences and Plant PathologyCereal Genomics LabMontana State UniversityBozemanMTUSA
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Shivakumara TN, Sreevathsa R, Dash PK, Sheshshayee MS, Papolu PK, Rao U, Tuteja N, UdayaKumar M. Overexpression of Pea DNA Helicase 45 (PDH45) imparts tolerance to multiple abiotic stresses in chili (Capsicum annuum L.). Sci Rep 2017; 7:2760. [PMID: 28584274 PMCID: PMC5459802 DOI: 10.1038/s41598-017-02589-0] [Citation(s) in RCA: 52] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2016] [Accepted: 04/12/2017] [Indexed: 11/09/2022] Open
Abstract
Imparting tolerance to abiotic stresses is of global importance as they inflict significant yield losses in field as well as in vegetable crops. Transcriptional activators, including helicases are identified to play a pivotal role in stress mitigation. Helicases, also known as molecular motors, are involved in myriad cellular processes that impart intrinsic tolerance to abiotic stresses in plants. Our study demonstrates the potential of a Pea DNA Helicase 45 (PDH45), in combating multiple abiotic stresses in chili. We harnessed Agrobacterium-mediated in planta transformation strategy for the generation of stable, single copy transgenic events. Precise molecular detection of the transgenes by sqRT-PCR coupled with genomic Southern analysis revealed variation in the integration of PDH45 at distinct loci in independent transgenic events. Characterization of five promising transgenic events showed both improved response to an array of simulated abiotic stresses and enhanced expression of several stress-responsive genes. While survival and recovery of transgenic events were significantly higher under gradual moisture stress conditions, under imposition of moderate stress, the transgenic events exhibited invigorated growth and productivity with concomitant improvement in water use efficiency (WUE). Thus, our study, unequivocally demonstrated the cardinal role of PDH45 in alleviating multiple abiotic stresses in chili.
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Affiliation(s)
- Tagginahalli N Shivakumara
- Department of Crop Physiology, University of Agricultural Sciences, GKVK, Bangalore, India
- ICAR-Indian Agricultural Research Institute, Pusa Campus, New Delhi, India
| | - Rohini Sreevathsa
- Department of Crop Physiology, University of Agricultural Sciences, GKVK, Bangalore, India.
- ICAR-National Research Centre on Plant Biotechnology, Pusa Campus, New Delhi, India.
| | - Prasanta K Dash
- ICAR-National Research Centre on Plant Biotechnology, Pusa Campus, New Delhi, India
| | - M S Sheshshayee
- Department of Crop Physiology, University of Agricultural Sciences, GKVK, Bangalore, India
| | - Pradeep K Papolu
- ICAR-Indian Agricultural Research Institute, Pusa Campus, New Delhi, India
| | - Uma Rao
- ICAR-Indian Agricultural Research Institute, Pusa Campus, New Delhi, India
| | - Narendra Tuteja
- Amity Institute of Microbial Technology, Amity University, Noida, Uttar Pradesh, India
| | - M UdayaKumar
- Department of Crop Physiology, University of Agricultural Sciences, GKVK, Bangalore, India.
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Macovei A, Sahoo RK, Faè M, Balestrazzi A, Carbonera D, Tuteja N. Overexpression of PDH45 or SUV3 helicases in rice leads to delayed leaf senescence-associated events. PROTOPLASMA 2017; 254:1103-1113. [PMID: 27586643 DOI: 10.1007/s00709-016-1017-4] [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: 05/12/2016] [Accepted: 08/17/2016] [Indexed: 06/06/2023]
Abstract
Senescence is a very complex process characterized by a highly regulated series of degenerative events which include changes in cell structure, metabolism and gene expression. In animals, one of the indicators of senescence is telomere shortening. In plants, this aspect is more puzzling because telomere shortening is not always correlated with senescence. In some cases, there were no differences in telomere length during plant developmental stages while in other cases both shortening and lengthening have been observed. Several genes involved in telomere homeostasis have been identified in plants, including some helicases. In the present study, the salinity stress-tolerant transgenic IR64 rice plants overexpressing the PDH45 (Pea DNA Helicase 45) or SUV3 (Suppressor of Var1-3) genes were used to test their performance during natural senescence at flowering (S2) and seed maturation (S4) developmental stages. Our results reveal that both PDH45 and SUV3 transgenic rice lines present decreased levels of necrosis/apoptosis as compared to wild type plants. Additionally, in these plants, some senescence-associated genes (SAGs) were downregulated at S2 and S4 stages, while genes involved in the maintenance of genome stability and DNA repair were upregulated. More interestingly, the telomeres were up to 3.8-fold longer in the SUV3 overexpressing lines as compared to wild type plants. This was associated with an increase (2.5-fold) in telomerase (OsTERT) transcript level. This is an interesting result reporting a possible involvement of SUV3 in telomere homeostasis in plants.
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Affiliation(s)
- Anca Macovei
- Plant Molecular Biology Group, International Center for Genetic Engineering and Biotechnology (ICGEB), Aruna Asaf Ali Marg, 110067, New Delhi, India
- Department of Biology and Biotechnology "L. Spallanzani", University of Pavia, via Ferrata 9, 27100, Pavia, Italy
| | - Ranjan K Sahoo
- Plant Molecular Biology Group, International Center for Genetic Engineering and Biotechnology (ICGEB), Aruna Asaf Ali Marg, 110067, New Delhi, India
| | - Matteo Faè
- Department of Biology and Biotechnology "L. Spallanzani", University of Pavia, via Ferrata 9, 27100, Pavia, Italy
| | - Alma Balestrazzi
- Department of Biology and Biotechnology "L. Spallanzani", University of Pavia, via Ferrata 9, 27100, Pavia, Italy
| | - Daniela Carbonera
- Department of Biology and Biotechnology "L. Spallanzani", University of Pavia, via Ferrata 9, 27100, Pavia, Italy
| | - Narendra Tuteja
- Plant Molecular Biology Group, International Center for Genetic Engineering and Biotechnology (ICGEB), Aruna Asaf Ali Marg, 110067, New Delhi, India.
- Amity Institute of Microbial Technology, Amity University Uttar Pradesh, E2-Block, Sector 125, Noida, UP, 201313, India.
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Gong W, Xu F, Sun J, Peng Z, He S, Pan Z, Du X. iTRAQ-Based Comparative Proteomic Analysis of Seedling Leaves of Two Upland Cotton Genotypes Differing in Salt Tolerance. FRONTIERS IN PLANT SCIENCE 2017; 8:2113. [PMID: 29326733 PMCID: PMC5733471 DOI: 10.3389/fpls.2017.02113] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2017] [Accepted: 11/27/2017] [Indexed: 05/21/2023]
Abstract
Cotton yields are greatly reduced under high salinity stress conditions, although cotton is considered a moderately salt-tolerant crop. Understanding at the molecular level how cotton responds to salt stress will help in developing salt tolerant varieties. Here, we combined physiological analysis with isobaric tags for relative and absolute quantitation (iTRAQ)-based proteomics of seedling leaves of 2 genotypes differing in salinity tolerance to 200 mM (18.3 dS/m) NaCl stress. Salt stress produced significant stress symptoms in the sensitive genotype Nan Dan Ba Di Da Hua (N), including lower relative water and chlorophyll contents and higher relative electrolyte leakage and Na+/K+ ratio in leaf samples, compared with those in the tolerant genotype Earlistaple 7 (Z). A total of 58 differentially abundant salt-responsive proteins were identified. Asp-Glu-Ala-Asp (DEAD)-box ATP-dependent RNA helicase 3 and protochlorophyllide reductase were markedly suppressed after salt treatment, whereas the phosphate-related differentially abundant proteins (DAPs) phosphoethanolamine N-methyltransferase 1 and 14-3-3-like protein E were induced, and all these proteins may play significant roles in salt stress. Twenty-nine salt-responsive proteins were also genotype specific, and 62.1 and 27.6% of these were related to chloroplast and defense responses, respectively. Based on the Arabidopsis thaliana protein interaction database, orthologs of 25 proteins showed interactions in Arabidopsis, and among these, a calmodulin protein was predicted to have 212 functional partners. In addition, the Golgi apparatus and calcium may be important for salt secretion in cotton. Through integrative proteome and transcriptome analysis, 16 DAPs were matched to differentially expressed genes and verified using qRT-PCR. On the basis of these findings, we proposed that some proteins related to chloroplast, ATP, ribosomal, and phosphate metabolism as well as to the Golgi apparatus and calcium may play key roles in the short-term salt stress response of cotton seedling leaves.
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Singh RK, Prasad M. Advances in Agrobacterium tumefaciens-mediated genetic transformation of graminaceous crops. PROTOPLASMA 2016; 253:691-707. [PMID: 26660352 DOI: 10.1007/s00709-015-0905-3] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2015] [Accepted: 10/27/2015] [Indexed: 05/05/2023]
Abstract
Steady increase in global population poses several challenges to plant science research, including demand for increased crop productivity, grain yield, nutritional quality and improved tolerance to different environmental factors. Transgene-based approaches are promising to address these challenges by transferring potential candidate genes to host organisms through different strategies. Agrobacterium-mediated gene transfer is one such strategy which is well known for enabling efficient gene transfer in both monocot and dicots. Due to its versatility, this technique underwent several advancements including development of improved in vitro plant regeneration system, co-cultivation and selection methods, and use of hyper-virulent strains of Agrobacterium tumefaciens harbouring super-binary vectors. The efficiency of this method has also been enhanced by the use of acetosyringone to induce the activity of vir genes, silver nitrate to reduce the Agrobacterium-induced necrosis and cysteine to avoid callus browning during co-cultivation. In the last two decades, extensive efforts have been invested towards achieving efficient Agrobacterium-mediated transformation in cereals. Though high-efficiency transformation systems have been developed for rice and maize, comparatively lesser progress has been reported in other graminaceous crops. In this context, the present review discusses the progress made in Agrobacterium-mediated transformation system in rice, maize, wheat, barley, sorghum, sugarcane, Brachypodium, millets, bioenergy and forage and turf grasses. In addition, it also provides an overview of the genes that have been recently transferred to these graminaceous crops using Agrobacterium, bottlenecks in this technique and future possibilities for crop improvement.
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Affiliation(s)
- Roshan Kumar Singh
- National Institute of Plant Genome Research (NIPGR), Aruna Asaf Ali Marg, JNU Campus, New Delhi, 110 067, India
| | - Manoj Prasad
- National Institute of Plant Genome Research (NIPGR), Aruna Asaf Ali Marg, JNU Campus, New Delhi, 110 067, India.
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Augustine SM, Ashwin Narayan J, Syamaladevi DP, Appunu C, Chakravarthi M, Ravichandran V, Tuteja N, Subramonian N. Introduction of Pea DNA Helicase 45 Into Sugarcane (Saccharum spp. Hybrid) Enhances Cell Membrane Thermostability And Upregulation Of Stress-responsive Genes Leads To Abiotic Stress Tolerance. Mol Biotechnol 2015; 57:475-88. [PMID: 25875731 DOI: 10.1007/s12033-015-9841-x] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
DNA helicases are motor proteins that play an essential role in nucleic acid metabolism, by providing a duplex-unwinding function. To improve the drought and salinity tolerance of sugarcane, a DEAD-box helicase gene isolated from pea with a constitutive promoter, Port Ubi 2.3 was transformed into the commercial sugarcane variety Co 86032 through Agrobacterium-mediated transformation, and the transgenics were screened for tolerance to soil moisture stress and salinity. The transgene integration was confirmed through polymerase chain reaction, and the V 0 transgenic events showed significantly higher cell membrane thermostability under normal irrigated conditions. The V 1 transgenic events were screened for tolerance to soil moisture stress and exhibited significantly higher cell membrane thermostability, transgene expression, relative water content, gas exchange parameters, chlorophyll content, and photosynthetic efficiency under soil moisture stress compared to wild-type (WT). The overexpression of PDH45 transgenic sugarcane also led to the upregulation of DREB2-induced downstream stress-related genes. The transgenic events demonstrated higher germination ability and better chlorophyll retention than WT under salinity stress. Our results suggest the possibility for development of increased abiotic stress tolerant sugarcane cultivars through overexpression of PDH45 gene. Perhaps this is the first report, which provides evidence for increased drought and salinity tolerance in sugarcane through overexpression of PDH45.
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Browning KS, Bailey-Serres J. Mechanism of cytoplasmic mRNA translation. THE ARABIDOPSIS BOOK 2015; 13:e0176. [PMID: 26019692 PMCID: PMC4441251 DOI: 10.1199/tab.0176] [Citation(s) in RCA: 144] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Protein synthesis is a fundamental process in gene expression that depends upon the abundance and accessibility of the mRNA transcript as well as the activity of many protein and RNA-protein complexes. Here we focus on the intricate mechanics of mRNA translation in the cytoplasm of higher plants. This chapter includes an inventory of the plant translational apparatus and a detailed review of the translational processes of initiation, elongation, and termination. The majority of mechanistic studies of cytoplasmic translation have been carried out in yeast and mammalian systems. The factors and mechanisms of translation are for the most part conserved across eukaryotes; however, some distinctions are known to exist in plants. A comprehensive understanding of the complex translational apparatus and its regulation in plants is warranted, as the modulation of protein production is critical to development, environmental plasticity and biomass yield in diverse ecosystems and agricultural settings.
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Affiliation(s)
- Karen S. Browning
- Department of Molecular Biosciences and Institute for Cell and Molecular Biology, University of Texas at Austin, Austin TX 78712-0165
- Both authors contributed equally to this work
| | - Julia Bailey-Serres
- Department of Botany and Plant Sciences and Center for Plant Cell Biology, University of California, Riverside, CA, 92521 USA
- Both authors contributed equally to this work
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Krishna G, Singh BK, Kim EK, Morya VK, Ramteke PW. Progress in genetic engineering of peanut (Arachis hypogaea L.)--a review. PLANT BIOTECHNOLOGY JOURNAL 2015; 13:147-62. [PMID: 25626474 DOI: 10.1111/pbi.12339] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2014] [Revised: 11/27/2014] [Accepted: 12/17/2014] [Indexed: 05/20/2023]
Abstract
Peanut (Arachis hypogaea L.) is a major species of the family, Leguminosae, and economically important not only for vegetable oil but as a source of proteins, minerals and vitamins. It is widely grown in the semi-arid tropics and plays a role in the world agricultural economy. Peanut production and productivity is constrained by several biotic (insect pests and diseases) and abiotic (drought, salinity, water logging and temperature aberrations) stresses, as a result of which crop experiences serious economic losses. Genetic engineering techniques such as Agrobacterium tumefaciens and DNA-bombardment-mediated transformation are used as powerful tools to complement conventional breeding and expedite peanut improvement by the introduction of agronomically useful traits in high-yield background. Resistance to several fungal, virus and insect pest have been achieved through variety of approaches ranging from gene coding for cell wall component, pathogenesis-related proteins, oxalate oxidase, bacterial chloroperoxidase, coat proteins, RNA interference, crystal proteins etc. To develop transgenic plants withstanding major abiotic stresses, genes coding transcription factors for drought and salinity, cytokinin biosynthesis, nucleic acid processing, ion antiporter and human antiapoptotic have been used. Moreover, peanut has also been used in vaccine production for the control of several animal diseases. In addition to above, this study also presents a comprehensive account on the influence of some important factors on peanut genetic engineering. Future research thrusts not only suggest the use of different approaches for higher expression of transgene(s) but also provide a way forward for the improvement of crops.
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Affiliation(s)
- Gaurav Krishna
- Jacob School of Biotechnology & Bioengineering, Sam Higginbottom Institute of Agriculture, Technology & Sciences (Formerly Allahabad Agricultural Institute), Deemed University, Allahabad, Uttar Pradesh, India
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Nath M, Garg B, Sahoo RK, Tuteja N. PDH45 overexpressing transgenic tobacco and rice plants provide salinity stress tolerance via less sodium accumulation. PLANT SIGNALING & BEHAVIOR 2015; 10:e992289. [PMID: 25830863 PMCID: PMC4623307 DOI: 10.4161/15592324.2014.992289] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2014] [Revised: 10/31/2014] [Accepted: 10/31/2014] [Indexed: 05/20/2023]
Abstract
Salinity stress negatively affects the crop productivity worldwide, including that of rice. Coping with these losses is a major concern for all countries. The pea DNA helicase, PDH45 is a unique member of helicase family involved in the salinity stress tolerance. However, the exact mechanism of the PDH45 in salinity stress tolerance is yet to be established. Therefore, the present study was conducted to investigate the mechanism of PDH45-mediated salinity stress tolerance in transgenic tobacco and rice lines along with wild type (WT) plants using CoroNa Green dye based sodium localization in root and shoot sections. The results showed that under salinity stress root and shoot of PDH45 overexpressing transgenic tobacco and rice accumulated less sodium (Na(+)) as compared to their respective WT. The present study also reports salinity tolerant (FL478) and salinity susceptible (Pusa-44) varieties of rice accumulated lowest and highest Na(+) level, respectively. All the varieties and transgenic lines of rice accumulate differential Na(+) ions in root and shoot. However, roots accumulate high Na(+) as compared to the shoots in both tobacco and rice transgenic lines suggesting that the Na(+) transport in shoot is somehow inhibited. It is proposed that the PDH45 is probably involved in the deposition of apoplastic hydrophobic barriers and consequently inhibit Na(+) transport to shoot and therefore confers salinity stress tolerance to PDH45 overexpressing transgenic lines. This study concludes that tobacco (dicot) and rice (monocot) transgenic plants probably share common salinity tolerance mechanism mediated by PDH45 gene.
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Affiliation(s)
- Manoj Nath
- Plant Biology; Plant Molecular Biology Group; International Center for Genetic Engineering and Biotechnology; Aruna Asaf Ali Marg; New Delhi, India
| | - Bharti Garg
- Plant Biology; Plant Molecular Biology Group; International Center for Genetic Engineering and Biotechnology; Aruna Asaf Ali Marg; New Delhi, India
| | - Ranjan Kumar Sahoo
- Plant Biology; Plant Molecular Biology Group; International Center for Genetic Engineering and Biotechnology; Aruna Asaf Ali Marg; New Delhi, India
| | - Narendra Tuteja
- Plant Biology; Plant Molecular Biology Group; International Center for Genetic Engineering and Biotechnology; Aruna Asaf Ali Marg; New Delhi, India
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Chen J, Wan S, Liu H, Fan S, Zhang Y, Wang W, Xia M, Yuan R, Deng F, Shen F. Overexpression of an Apocynum venetum DEAD-Box Helicase Gene (AvDH1) in Cotton Confers Salinity Tolerance and Increases Yield in a Saline Field. FRONTIERS IN PLANT SCIENCE 2015; 6:1227. [PMID: 26779246 PMCID: PMC4705273 DOI: 10.3389/fpls.2015.01227] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/2015] [Accepted: 12/18/2015] [Indexed: 05/04/2023]
Abstract
Soil salinity is a major environmental stress limiting plant growth and productivity. We have reported previously the isolation of an Apocynum venetum DEAD-box helicase 1 (AvDH1) that is expressed in response to salt exposure. Here, we report that the overexpression of AvDH1 driven by a constitutive cauliflower mosaic virus-35S promoter in cotton plants confers salinity tolerance. Southern and Northern blotting analyses showed that the AvDH1 gene was integrated into the cotton genome and expressed. In this study, the growth of transgenic cotton expressing AvDH1 was evaluated under saline conditions in a growth chamber and in a saline field trial. Transgenic cotton overexpressing AvDH1 was much more resistant to salt than the wild-type plants when grown in a growth chamber. The lower membrane ion leakage, along with increased activity of superoxide dismutase, in AvDH1 transgenic lines suggested that these characteristics may prevent membrane damage, which increases plant survival rates. In a saline field, the transgenic cotton lines expressing AvDH1 showed increased boll numbers, boll weights and seed cotton yields compared with wild-type plants, especially at high soil salinity levels. This study indicates that transgenic cotton expressing AvDH1 is a promising option for increasing crop productivity in saline fields.
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Affiliation(s)
- Jie Chen
- State Key Laboratory of Crop Biology, College of Agronomy, Shandong Agricultural UniversityTaian, China
| | - Sibao Wan
- College of Life Science, Shanghai UniversityShanghai, China
| | - Huaihua Liu
- State Key Laboratory of Crop Biology, College of Agronomy, Shandong Agricultural UniversityTaian, China
| | - Shuli Fan
- Cotton Research Institute – Chinese Academy of Agricultural SciencesAnyang, China
| | - Yujuan Zhang
- Cotton Research Center, Shandong Academy of Agricultural SciencesJinan, China
| | - Wei Wang
- State Key Laboratory of Crop Biology, College of Agronomy, Shandong Agricultural UniversityTaian, China
| | - Minxuan Xia
- State Key Laboratory of Crop Biology, College of Agronomy, Shandong Agricultural UniversityTaian, China
| | - Rui Yuan
- State Key Laboratory of Crop Biology, College of Agronomy, Shandong Agricultural UniversityTaian, China
| | - Fenni Deng
- State Key Laboratory of Crop Biology, College of Agronomy, Shandong Agricultural UniversityTaian, China
| | - Fafu Shen
- State Key Laboratory of Crop Biology, College of Agronomy, Shandong Agricultural UniversityTaian, China
- *Correspondence: Fafu Shen,
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Kim SW, Min CW, Gupta R, Jo IH, Bang KH, Kim YC, Kim KH, Kim ST. Proteomics Analysis of Early Salt-Responsive Proteins in Ginseng (Panax ginseng C. A. Meyer) Leaves. ACTA ACUST UNITED AC 2014. [DOI: 10.7783/kjmcs.2014.22.5.398] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Tuteja N, Banu MSA, Huda KMK, Gill SS, Jain P, Pham XH, Tuteja R. Pea p68, a DEAD-box helicase, provides salinity stress tolerance in transgenic tobacco by reducing oxidative stress and improving photosynthesis machinery. PLoS One 2014; 9:e98287. [PMID: 24879307 PMCID: PMC4039504 DOI: 10.1371/journal.pone.0098287] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2014] [Accepted: 04/30/2014] [Indexed: 11/21/2022] Open
Abstract
BACKGROUND The DEAD-box helicases are required mostly in all aspects of RNA and DNA metabolism and they play a significant role in various abiotic stresses, including salinity. The p68 is an important member of the DEAD-box proteins family and, in animal system, it is involved in RNA metabolism including pre-RNA processing and splicing. In plant system, it has not been well characterized. Here we report the cloning and characterization of p68 from pea (Pisum sativum) and its novel function in salinity stress tolerance in plant. RESULTS The pea p68 protein self-interacts and is localized in the cytosol as well as the surrounding of cell nucleus. The transcript of pea p68 is upregulated in response to high salinity stress in pea. Overexpression of p68 driven by constitutive cauliflower mosaic virus-35S promoter in tobacco transgenic plants confers enhanced tolerances to salinity stress by improving the growth, photosynthesis and antioxidant machinery. Under stress treatment, pea p68 overexpressing tobacco accumulated higher K+ and lower Na+ level than the wild-type plants. Reactive oxygen species (ROS) accumulation was remarkably regulated by the overexpression of pea p68 under salinity stress conditions, as shown from TBARS content, electrolyte leakage, hydrogen peroxide accumulation and 8-OHdG content and antioxidant enzyme activities. CONCLUSIONS To the best of our knowledge this is the first direct report, which provides the novel function of pea p68 helicase in salinity stress tolerance. The results suggest that p68 can also be exploited for engineering abiotic stress tolerance in crop plants of economic importance.
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Affiliation(s)
- Narendra Tuteja
- International Centre for Genetic Engineering and Biotechnology, Aruna Asaf Ali Marg, New Delhi, India
| | - Mst. Sufara Akhter Banu
- International Centre for Genetic Engineering and Biotechnology, Aruna Asaf Ali Marg, New Delhi, India
| | - Kazi Md. Kamrul Huda
- International Centre for Genetic Engineering and Biotechnology, Aruna Asaf Ali Marg, New Delhi, India
| | - Sarvajeet Singh Gill
- Stress Physiology and Molecular Biology Lab, Centre for Biotechnology, MD University, Rohtak, India
| | - Parul Jain
- International Centre for Genetic Engineering and Biotechnology, Aruna Asaf Ali Marg, New Delhi, India
| | - Xuan Hoi Pham
- International Centre for Genetic Engineering and Biotechnology, Aruna Asaf Ali Marg, New Delhi, India
| | - Renu Tuteja
- International Centre for Genetic Engineering and Biotechnology, Aruna Asaf Ali Marg, New Delhi, India
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Tuteja N, Sahoo RK, Garg B, Tuteja R. OsSUV3 dual helicase functions in salinity stress tolerance by maintaining photosynthesis and antioxidant machinery in rice (Oryza sativa L. cv. IR64). THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2013; 76:115-27. [PMID: 23808500 DOI: 10.1111/tpj.12277] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2013] [Revised: 06/17/2013] [Accepted: 06/24/2013] [Indexed: 05/20/2023]
Abstract
To overcome the salinity-induced loss of crop yield, a salinity-tolerant trait is required. The SUV3 helicase is involved in the regulation of RNA surveillance and turnover in mitochondria, but the helicase activity of plant SUV3 and its role in abiotic stress tolerance have not been reported so far. Here we report that the Oryza sativa (rice) SUV3 protein exhibits DNA and RNA helicase, and ATPase activities. Furthermore, we report that SUV3 is induced in rice seedlings in response to high levels of salt. Its expression, driven by a constitutive cauliflower mosaic virus 35S promoter in IR64 transgenic rice plants, confers salinity tolerance. The T1 and T2 sense transgenic lines showed tolerance to high salinity and fully matured without any loss in yields. The T2 transgenic lines also showed tolerance to drought stress. These results suggest that the introduced trait is functional and stable in transgenic rice plants. The rice SUV3 sense transgenic lines showed lesser lipid peroxidation, electrolyte leakage and H2 O2 production, along with higher activities of antioxidant enzymes under salinity stress, as compared with wild type, vector control and antisense transgenic lines. These results suggest the existence of an efficient antioxidant defence system to cope with salinity-induced oxidative damage. Overall, this study reports that plant SUV3 exhibits DNA and RNA helicase and ATPase activities, and provides direct evidence of its function in imparting salinity stress tolerance without yield loss. The possible mechanism could be that OsSUV3 helicase functions in salinity stress tolerance by improving photosynthesis and antioxidant machinery in transgenic rice.
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Affiliation(s)
- Narendra Tuteja
- International Centre for Genetic Engineering and Biotechnology, Aruna Asaf Ali Marg, New Delhi, 110067, India
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Sahoo RK, Tuteja N. Effect of salinity tolerant PDH45 transgenic rice on physicochemical properties, enzymatic activities and microbial communities of rhizosphere soils. PLANT SIGNALING & BEHAVIOR 2013; 8:24950. [PMID: 23733066 PMCID: PMC3999083 DOI: 10.4161/psb.24950] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
The effect of genetically modified (GM) plants on environment is now major concern worldwide. The plant roots of rhizosphere soil interact with variety of bacteria which could be influenced by the transgene in GM plants. The antibiotic resistance genes in GM plants may be transferred to soil microbes. In this study we have examined the effect of overexpression of salinity tolerant pea DNA helicase 45 (PDH45) gene on microbes and enzymatic activities in the rhizosphere soil of transgenic rice IR64 in presence and absence of salt stress in two different rhizospheric soils (New Delhi and Odisha, India). The diversity of the microbial community and soil enzymes viz., dehydrogenase, alkaline phosphatase, urease and nitrate reductase was assessed. The results revealed that there was no significant effect of transgene expression on rhizosphere soil of the rice plants. The isolated bacteria were phenotyped both in absence and presence of salt and no significant changes were found in their phenotypic characters as well as in their population. Overall, the overexpression of PDH45 in rice did not cause detectable changes in the microbial population, soil enzymatic activities and functional diversity of the rhizosphere soil microbial community.
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Gill SS, Tajrishi M, Madan M, Tuteja N. A DESD-box helicase functions in salinity stress tolerance by improving photosynthesis and antioxidant machinery in rice (Oryza sativa L. cv. PB1). PLANT MOLECULAR BIOLOGY 2013; 82:1-22. [PMID: 23456247 DOI: 10.1007/s11103-013-0031-6] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2012] [Accepted: 02/15/2013] [Indexed: 05/09/2023]
Abstract
The exact mechanism of helicase-mediated salinity tolerance is not yet understood. We have isolated a DESD-box containing cDNA from Pisum sativum (Pea) and named it as PDH45. It is a unique member of DEAD-box helicase family; containing DESD instead of DEAD/H. PDH45 overexpression driven by constitutive cauliflower mosaic virus-35S promoter in rice transgenic [Oryza sativa L. cv. Pusa Basmati 1 (PB1)] plants confers salinity tolerance by improving the photosynthesis and antioxidant machinery. The Na(+) ion concentration and oxidative stress parameters in leaves of the NaCl (0, 100 or 200 mM) treated PDH45 overexpressing T1 transgenic lines were lower as compared to wild type (WT) rice plants under similar conditions. The 200 mM NaCl significantly reduced the leaf area, plant dry mass, net photosynthetic rate (PN), stomatal conductance (gs), intercellular CO2 (Ci), chlorophyll (Chl) content in WT plants as compared to the transgenics. The T1 transgenics exhibited higher glutathione (GSH) and ascorbate (AsA) contents under salinity stress. The activities of antioxidant enzymes viz. superoxide dismutase (SOD), ascorbate peroxidase (APX), guaiacol peroxidase (GPX) and glutathione reductase (GR) were significantly higher in transgenics; suggesting the existence of an efficient antioxidant defence system to cope with salinity induced-oxidative damage. Yeast two-hybrid assay indicated that the PDH45 protein interacts with Cu/Zn SOD, adenosine-5'-phosphosulfate-kinase, cysteine proteinase and eIF(4G), thus confirming the involvement of ROS scavenging machinery in the transgenic plants to provide salt tolerance. Furthermore, the T2 transgenics were also able to grow, flower, and set viable seeds under continuous salinity stress of 200 mM NaCl. This study provides insights into the mechanism of PDH45 mediated salinity stress tolerance by controlling the generation of stress induced reactive oxygen species (ROS) and also by protecting the photosynthetic machinery through a strengthened antioxidant system.
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Affiliation(s)
- Sarvajeet Singh Gill
- Plant Molecular Biology Group, International Centre for Genetic Engineering and Biotechnology, Aruna Asaf Ali Marg, New Delhi, 110067, India
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Yu J, Wen CK. Arabidopsis aux1rcr1 mutation alters AUXIN RESISTANT1 targeting and prevents expression of the auxin reporter DR5:GUS in the root apex. JOURNAL OF EXPERIMENTAL BOTANY 2013; 64:921-33. [PMID: 23293348 PMCID: PMC3580809 DOI: 10.1093/jxb/ers371] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Multilevel interactions of the plant hormones ethylene and auxin coordinately and synergistically regulate many aspects of plant growth and development. This study isolated the AUXIN RESISTANT1 (AUX1) allele aux1(rcr1) (RCR1 for REVERSING CTR1-10 ROOT1) that suppressed the root growth inhibition conferred by the constitutive ethylene-response constitutive triple response1-10 (ctr1-10) allele. The aux1(rcr1) mutation resulted from an L126F substitution at loop 2 of the plasma membrane-associated auxin influx carrier protein AUX1. aux1(rcr1) and the T-DNA insertion mutant aux1-T were both defective in auxin transport and many aspects of the auxin response. Unexpectedly, expression of the auxin-response reporter DR5:GUS in the root apex was substantially prevented by the aux1(rcr1) but not the aux1-T mutation, even in the presence of the wild-type AUX1 allele. Following treatment with the synthetic auxin 1-naphthaleneacetic acid (NAA), DR5:GUS expression in aux1(rcr1) and aux1-T occurred mainly in the root apex and mature zone. NAA-induced DR5:GUS expression in the root apex was markedly prevented by ethylene in genotypes with aux1(rcr1) but not in aux1-T genotypes and the wild type. The effect of aux1(rcr1) on DR5:GUS expression seemed to be associated with AUX1-expressing domains. Green fluorescence protein-fused aux1(rcr1) was localized in the cytoplasm and probably not to the plasma membrane, indicating important roles of the Lys(126) residue at loop 2 in AUX1 targeting. The possible effects of aux1(rcr1) on DR5:GUS expression are discussed.
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Affiliation(s)
- Jing Yu
- National Key Laboratory of Plant Molecular Genetics and National Center for Plant Gene Research (Shanghai), Institute of Plant Physiology and Ecology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, 300 Fenglin Road, Shanghai 200032, China
| | - Chi-Kuang Wen
- National Key Laboratory of Plant Molecular Genetics and National Center for Plant Gene Research (Shanghai), Institute of Plant Physiology and Ecology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, 300 Fenglin Road, Shanghai 200032, China
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Macovei A, Tuteja N. microRNAs targeting DEAD-box helicases are involved in salinity stress response in rice (Oryza sativa L.). BMC PLANT BIOLOGY 2012; 12:183. [PMID: 23043463 PMCID: PMC3502329 DOI: 10.1186/1471-2229-12-183] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2012] [Accepted: 10/05/2012] [Indexed: 05/02/2023]
Abstract
BACKGROUND Rice (Oryza sativa L.), one of the most important food crop in the world, is considered to be a salt-sensitive crop. Excess levels of salt adversely affect all the major metabolic activities, including cell wall damage, cytoplasmic lysis and genomic stability. In order to cope with salt stress, plants have evolved high degrees of developmental plasticity, including adaptation via cascades of molecular networks and changes in gene expression profiles. Posttranscriptional regulation, through the activity of microRNAs, also plays an important role in the plant response to salinity conditions. MicroRNAs are small endogenous RNAs that modulate gene expression and are involved in the most essential physiological processes, including plant development and adaptation to environmental changes. RESULTS In the present study, we investigated the expression profiles of osa-MIR414, osa-MIR408 and osa-MIR164e along with their targeted genes, under salinity stress conditions in wild type and transgenic rice plants ectopically expressing the PDH45 (Pea DNA Helicase) gene. The present miRNAs were predicted to target the OsABP (ATP-Binding Protein), OsDSHCT (DOB1/SK12/helY-like DEAD-box Helicase) and OsDBH (DEAD-Box Helicase) genes, included in the DEAD-box helicase family. An in silico characterization of the proteins was performed and the miRNAs predicted targets were validated by RLM-5'RACE. The qRT-PCR analysis showed that the OsABP, OsDBH and OsDSHCT genes were up-regulated in response to 100 and 200 mM NaCl treatments. The present study also highlighted an increased accumulation of the gene transcripts in wild type plants, with the exception of the OsABP mRNA which showed the highest level (15.1-fold change compared to control) in the transgenic plants treated with 200 mM NaCl. Salinity treatments also affected the expression of osa-MIR414, osa-MIR164e and osa-MIR408, found to be significantly down-regulated, although the changes in miRNA expression were limited. CONCLUSIONS Osa-MIR414, osa-MIR164e and osa-MIR408 were experimentally validated for the first time in plants as targeting the OsABP, OsDBH and OsDSHCT genes. Our data showed that that the genes were up-regulated and the miRNAs were down-regulated in relation to salt stress. The negative correlation between the miRNAs and their targets was proven.
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Affiliation(s)
- Anca Macovei
- Plant Molecular Biology Group, International Centre for Genetic Engineering and Biotechnology, Aruna Asaf Ali Marg, New Delhi, 110067, India
| | - Narendra Tuteja
- Plant Molecular Biology Group, International Centre for Genetic Engineering and Biotechnology, Aruna Asaf Ali Marg, New Delhi, 110067, India
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Macovei A, Vaid N, Tula S, Tuteja N. A new DEAD-box helicase ATP-binding protein (OsABP) from rice is responsive to abiotic stress. PLANT SIGNALING & BEHAVIOR 2012; 7:1138-43. [PMID: 22899052 PMCID: PMC3489646 DOI: 10.4161/psb.21343] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
The DEAD-box RNA helicase family comprise enzymes that participate in every aspect of RNA metabolism, associated with a diverse range of cellular functions including response to abiotic stress. In the present study, we report on the identification of a new DEAD-box helicase ATP-binding protein (OsABP) from rice which is upregulated in response e to multiple abiotic stress treatments including NaCl, dehydration, ABA, blue and red light. It possesses an ORF of 2772 nt, encoding a protein of 923 aa, which contains the DEAD and helicase C-terminal domains, along with the nine conserved motifs specific to DEAD-box helicases. The in silico putative interaction with other proteins showed that OsABP interacts with proteins involved in RNA metabolism, signal transduction or stress response. These results imply that OsABP might perform important functions in the cellular response to specific abiotic stress.
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Affiliation(s)
- Anca Macovei
- Plant Molecular Biology Group; International Centre for Genetic Engineering and Biotechnology; Aruna Asaf Ali Marg; New Delhi, India
| | - Neha Vaid
- Plant Molecular Biology Group; International Centre for Genetic Engineering and Biotechnology; Aruna Asaf Ali Marg; New Delhi, India
| | - Suresh Tula
- Plant Molecular Biology Group; International Centre for Genetic Engineering and Biotechnology; Aruna Asaf Ali Marg; New Delhi, India
| | - Narendra Tuteja
- Plant Molecular Biology Group; International Centre for Genetic Engineering and Biotechnology; Aruna Asaf Ali Marg; New Delhi, India
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