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Chapagain S, Pruthi R, Singh L, Subudhi PK. Comparison of the genetic basis of salt tolerance at germination, seedling, and reproductive stages in an introgression line population of rice. Mol Biol Rep 2024; 51:252. [PMID: 38302786 DOI: 10.1007/s11033-023-09049-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2023] [Accepted: 11/02/2023] [Indexed: 02/03/2024]
Abstract
BACKGROUND Salinity is a major limitation for rice farming due to climate change. Since salt stress adversely impact rice plants at germination, seedling, and reproductive stages resulting in poor crop establishment and reduced grain yield, enhancing salt tolerance at these vulnerable growth stages will enhance rice productivity in salinity prone areas. METHODS AND RESULTS An introgression line (ILs) population from a cross between a high yielding cultivar 'Cheniere' and a salt tolerant donor 'TCCP' was evaluated to map quantitative trait loci (QTLs) for traits associated with salt tolerance at germination, seedling, and reproductive stages. Using a genotyping-by-sequencing based high density SNP linkage map, a total of 7, 16, and 30 QTLs were identified for five germination traits, seven seedling traits, and ten reproductive traits, respectively. There was overlapping of QTLs for some traits at different stages indicating the pleiotropic effects of these QTLs or clustering of linked genes. Candidate genes identified for salt tolerance were OsSDIR1 and SERF for the seedling stage, WRKY55 and OsUBC for the reproductive stage, and MYB family transcription factors for all three stages. Gene ontology analysis revealed significant GO terms related to nucleotide binding, protein binding, protein kinase activity, antiporter activity, active transmembrane transporter activity, calcium-binding protein, and F- box protein interaction domain containing protein. CONCLUSIONS The colocalized QTLs for traits at different growth stages would be helpful to improve multiple traits simultaneously using marker-assisted selection. The salt tolerant ILs have the potential to be released as varieties or as pre-breeding lines for developing salt tolerant rice varieties.
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Affiliation(s)
- Sandeep Chapagain
- School of Plant, Environmental, and Soil Sciences, Louisiana State University Agricultural Center, Baton Rouge, LA, 70803, USA
| | - Rajat Pruthi
- School of Plant, Environmental, and Soil Sciences, Louisiana State University Agricultural Center, Baton Rouge, LA, 70803, USA
| | - Lovepreet Singh
- School of Plant, Environmental, and Soil Sciences, Louisiana State University Agricultural Center, Baton Rouge, LA, 70803, USA
| | - Prasant K Subudhi
- School of Plant, Environmental, and Soil Sciences, Louisiana State University Agricultural Center, Baton Rouge, LA, 70803, USA.
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2
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Hu Z, Zhang N, Qin Z, Li J, Yang N, Chen Y, Kong J, Luo W, Xiong A, Zhuang J. Differential Response of MYB Transcription Factor Gene Transcripts to Circadian Rhythm in Tea Plants ( Camellia sinensis). Int J Mol Sci 2024; 25:657. [PMID: 38203827 PMCID: PMC10780195 DOI: 10.3390/ijms25010657] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2023] [Revised: 12/31/2023] [Accepted: 01/02/2024] [Indexed: 01/12/2024] Open
Abstract
The circadian clock refers to the formation of a certain rule in the long-term evolution of an organism, which is an invisible 'clock' in the body of an organism. As one of the largest TF families in higher plants, the MYB transcription factor is involved in plant growth and development. MYB is also inextricably correlated with the circadian rhythm. In this study, the transcriptome data of the tea plant 'Baiyeyihao' were measured at a photoperiod interval of 4 h (24 h). A total of 25,306 unigenes were obtained, including 14,615 unigenes that were annotated across 20 functional categories within the GO classification. Additionally, 10,443 single-gene clusters were annotated to 11 sublevels of metabolic pathways using KEGG. Based on the results of gene annotation and differential gene transcript analysis, 22 genes encoding MYB transcription factors were identified. The G10 group in the phylogenetic tree had 13 members, of which 5 were related to the circadian rhythm, accounting for 39%. The G1, G2, G8, G9, G15, G16, G18, G19, G20, G21 and G23 groups had no members associated with the circadian rhythm. Among the 22 differentially expressed MYB transcription factors, 3 members of LHY, RVE1 and RVE8 were core circadian rhythm genes belonging to the G10, G12 and G10 groups, respectively. Real-time fluorescence quantitative PCR was used to detect and validate the expression of the gene transcripts encoding MYB transcription factors associated with the circadian rhythm.
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Affiliation(s)
- Zhihang Hu
- Tea Science Research Institute, College of Horticulture, Nanjing Agricultural University, Nanjing 210095, China; (Z.H.); (Z.Q.); (J.L.); (N.Y.); (Y.C.); (J.K.); (W.L.)
- State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Nanjing Agricultural University, Nanjing 210095, China;
| | - Nan Zhang
- State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Nanjing Agricultural University, Nanjing 210095, China;
| | - Zhiyuan Qin
- Tea Science Research Institute, College of Horticulture, Nanjing Agricultural University, Nanjing 210095, China; (Z.H.); (Z.Q.); (J.L.); (N.Y.); (Y.C.); (J.K.); (W.L.)
| | - Jinwen Li
- Tea Science Research Institute, College of Horticulture, Nanjing Agricultural University, Nanjing 210095, China; (Z.H.); (Z.Q.); (J.L.); (N.Y.); (Y.C.); (J.K.); (W.L.)
| | - Ni Yang
- Tea Science Research Institute, College of Horticulture, Nanjing Agricultural University, Nanjing 210095, China; (Z.H.); (Z.Q.); (J.L.); (N.Y.); (Y.C.); (J.K.); (W.L.)
| | - Yi Chen
- Tea Science Research Institute, College of Horticulture, Nanjing Agricultural University, Nanjing 210095, China; (Z.H.); (Z.Q.); (J.L.); (N.Y.); (Y.C.); (J.K.); (W.L.)
| | - Jieyu Kong
- Tea Science Research Institute, College of Horticulture, Nanjing Agricultural University, Nanjing 210095, China; (Z.H.); (Z.Q.); (J.L.); (N.Y.); (Y.C.); (J.K.); (W.L.)
| | - Wei Luo
- Tea Science Research Institute, College of Horticulture, Nanjing Agricultural University, Nanjing 210095, China; (Z.H.); (Z.Q.); (J.L.); (N.Y.); (Y.C.); (J.K.); (W.L.)
| | - Aisheng Xiong
- State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Nanjing Agricultural University, Nanjing 210095, China;
| | - Jing Zhuang
- Tea Science Research Institute, College of Horticulture, Nanjing Agricultural University, Nanjing 210095, China; (Z.H.); (Z.Q.); (J.L.); (N.Y.); (Y.C.); (J.K.); (W.L.)
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Dong Y, Gupta S, Wargent JJ, Putterill J, Macknight RC, Gechev TS, Mueller-Roeber B, Dijkwel PP. Comparative Transcriptomics of Multi-Stress Responses in Pachycladon cheesemanii and Arabidopsis thaliana. Int J Mol Sci 2023; 24:11323. [PMID: 37511083 PMCID: PMC10379395 DOI: 10.3390/ijms241411323] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2023] [Revised: 06/26/2023] [Accepted: 07/06/2023] [Indexed: 07/30/2023] Open
Abstract
The environment is seldom optimal for plant growth and changes in abiotic and biotic signals, including temperature, water availability, radiation and pests, induce plant responses to optimise survival. The New Zealand native plant species and close relative to Arabidopsis thaliana, Pachycladon cheesemanii, grows under environmental conditions that are unsustainable for many plant species. Here, we compare the responses of both species to different stressors (low temperature, salt and UV-B radiation) to help understand how P. cheesemanii can grow in such harsh environments. The stress transcriptomes were determined and comparative transcriptome and network analyses discovered similar and unique responses within species, and between the two plant species. A number of widely studied plant stress processes were highly conserved in A. thaliana and P. cheesemanii. However, in response to cold stress, Gene Ontology terms related to glycosinolate metabolism were only enriched in P. cheesemanii. Salt stress was associated with alteration of the cuticle and proline biosynthesis in A. thaliana and P. cheesemanii, respectively. Anthocyanin production may be a more important strategy to contribute to the UV-B radiation tolerance in P. cheesemanii. These results allowed us to define broad stress response pathways in A. thaliana and P. cheesemanii and suggested that regulation of glycosinolate, proline and anthocyanin metabolism are strategies that help mitigate environmental stress.
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Affiliation(s)
- Yanni Dong
- School of Natural Sciences, Massey University, Tennent Drive, Palmerston North 4474, New Zealand
| | - Saurabh Gupta
- Department Molecular Biology, Institute of Biochemistry and Biology, University of Potsdam, Karl-Liebknecht-Straße 24-25, Haus 20, 14476 Potsdam, Germany
| | - Jason J Wargent
- School of Agriculture & Environment, Massey University, Palmerston North 4442, New Zealand
| | - Joanna Putterill
- School of Biological Sciences, University of Auckland, Auckland 1142, New Zealand
| | - Richard C Macknight
- Biochemistry Department, School of Biomedical Sciences, University of Otago, Dunedin 9016, New Zealand
| | - Tsanko S Gechev
- Center of Plant Systems Biology and Biotechnology (CPSBB), 139 Ruski Blvd., 4000 Plovdiv, Bulgaria
- Department of Plant Physiology and Plant Molecular Biology, University of Plovdiv, 24 Tsar Assen Str., 4000 Plovdiv, Bulgaria
| | - Bernd Mueller-Roeber
- Department Molecular Biology, Institute of Biochemistry and Biology, University of Potsdam, Karl-Liebknecht-Straße 24-25, Haus 20, 14476 Potsdam, Germany
- Center of Plant Systems Biology and Biotechnology (CPSBB), 139 Ruski Blvd., 4000 Plovdiv, Bulgaria
- Max Planck Institute of Molecular Plant Physiology, Am Mühlenberg 1, 14476 Potsdam, Germany
| | - Paul P Dijkwel
- School of Natural Sciences, Massey University, Tennent Drive, Palmerston North 4474, New Zealand
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Ahmad M. Genomics and transcriptomics to protect rice ( Oryza sativa. L.) from abiotic stressors: -pathways to achieving zero hunger. FRONTIERS IN PLANT SCIENCE 2022; 13:1002596. [PMID: 36340401 PMCID: PMC9630331 DOI: 10.3389/fpls.2022.1002596] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Accepted: 09/29/2022] [Indexed: 06/16/2023]
Abstract
More over half of the world's population depends on rice as a major food crop. Rice (Oryza sativa L.) is vulnerable to abiotic challenges including drought, cold, and salinity since it grown in semi-aquatic, tropical, or subtropical settings. Abiotic stress resistance has bred into rice plants since the earliest rice cultivation techniques. Prior to the discovery of the genome, abiotic stress-related genes were identified using forward genetic methods, and abiotic stress-tolerant lines have developed using traditional breeding methods. Dynamic transcriptome expression represents the degree of gene expression in a specific cell, tissue, or organ of an individual organism at a specific point in its growth and development. Transcriptomics can reveal the expression at the entire genome level during stressful conditions from the entire transcriptional level, which can be helpful in understanding the intricate regulatory network relating to the stress tolerance and adaptability of plants. Rice (Oryza sativa L.) gene families found comparatively using the reference genome sequences of other plant species, allowing for genome-wide identification. Transcriptomics via gene expression profiling which have recently dominated by RNA-seq complements genomic techniques. The identification of numerous important qtl,s genes, promoter elements, transcription factors and miRNAs involved in rice response to abiotic stress was made possible by all of these genomic and transcriptomic techniques. The use of several genomes and transcriptome methodologies to comprehend rice (Oryza sativa, L.) ability to withstand abiotic stress have been discussed in this review.
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Affiliation(s)
- Mushtaq Ahmad
- Visiting Scientist Plant Sciences, University of Nebraska, Lincoln, NE, United States
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5
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Fan M, Zhang Y, Li X, Wu S, Yang M, Yin H, Liu W, Fan Z, Li J. Multi-Approach Analysis Reveals Pathways of Cold Tolerance Divergence in Camellia japonica. FRONTIERS IN PLANT SCIENCE 2022; 13:811791. [PMID: 35283896 PMCID: PMC8914472 DOI: 10.3389/fpls.2022.811791] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/09/2021] [Accepted: 02/07/2022] [Indexed: 06/14/2023]
Abstract
Understanding the molecular mechanism of the cold response is critical to improve horticultural plant cold tolerance. Here, we documented the physiological, transcriptome, proteome, and hormonal dynamics to cold stress in temperate genotype (Tg) and subtropical genotype (Sg) populations of Camellia japonica. Tg C. japonica suffered minimal osmotic and oxidative damage compared to Sg C. japonica under the same cold treatment. Transcriptional and translational differences increased under the cold treatment, indicating that Tg C. japonica was affected by the environment and displayed both conserved and divergent mechanisms. About 60% of the genes responding to cold had similar dynamics in the two populations, but 1,896 transcripts and 455 proteins differentially accumulated in response to the cold between Tg and Sg C. japonica. Co-expression analysis showed that the ribosomal protein and genes related to photosynthesis were upregulated in Tg C. japonica, and tryptophan, phenylpropanoid, and flavonoid metabolism were regulated differently between the two populations under cold stress. The divergence of these genes reflected a difference in cold responsiveness. In addition, the decrease in the abscisic acid (ABA)/gibberellic acid (GA) ratio regulated by biosynthetic signal transduction pathway enhanced cold resistance in Tg C. japonica, suggesting that hormones may regulate the difference in cold responsiveness. These results provide a new understanding of the molecular mechanism of cold stress and will improve cold tolerance in horticultural plants.
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Affiliation(s)
| | | | - XinLei Li
- Research Institute of Subtropical Forestry, Chinese Academy of Forestry, Hangzhou, China
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6
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Jeong YS, Choi H, Kim JK, Baek SA, You MK, Lee D, Lim SH, Ha SH. Overexpression of OsMYBR22/OsRVE1 transcription factor simultaneously enhances chloroplast-dependent metabolites in rice grains. Metab Eng 2022; 70:89-101. [PMID: 35032672 DOI: 10.1016/j.ymben.2021.12.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Revised: 12/25/2021] [Accepted: 12/30/2021] [Indexed: 11/18/2022]
Abstract
The OsMYBR22 (same to OsRVE1), an R1type-MYB transcription factor belonging to the rice CCA1-like family, was upregulated under blue light condition, which enhanced the chlorophyll and carotenoid accumulation. The overexpression of OsMYBR22 in rice (Oryza sativa, L) led to everlasting green seeds and leaves of a darker green. Transgene expression patterns showed more concordance with chlorophyll than carotenoid profiles. The transcript levels of most genes related to chlorophyll biosynthesis and degradation examined were similarly repressed in the late maturing stages of seeds. It proposed that rice seeds have the feedback regulatory mechanism for chlorophyll biosynthesis and also implied that evergreen seed traits might be caused due to the inhibition of degradation rather than the promotion of biosynthesis for chlorophylls. Metabolomics revealed that OsMYBR22 overexpression largely and simultaneously enhanced the contents of nutritional and functional metabolites such as chlorophylls, carotenoids, amino acids including lysine and threonine, and amino acid derivatives including γ-aminobutyric acid, which are mostly biosynthesized in chloroplasts. Transmission electron microscopy anatomically demonstrated greener phenotypes with an increase in the number and thickness of chloroplasts in leaves and the structurally retentive chloroplasts in tubular and cross cells of the seed inner pericarp region. In conclusion, the molecular actions of OsMYBR22/OsRVE1 provided a new strategy for the biofortified rice variety, an "Evergreen Rice," with high accumulation of chloroplast-localized metabolites in rice grains.
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Affiliation(s)
- Ye Sol Jeong
- Department of Genetics and Biotechnology, College of Life Sciences, Kyung Hee University, Yongin, 17104, Republic of Korea; Department of Biotechnology, College of Life Sciences and Biotechnology, Korea University, Seoul, 02841, Republic of Korea
| | - Heebak Choi
- Department of Genetics and Biotechnology, College of Life Sciences, Kyung Hee University, Yongin, 17104, Republic of Korea
| | - Jae Kwang Kim
- Division of Life Sciences and Bio-Resource and Environmental Center, Incheon National University, Incheon, 22012, Republic of Korea
| | - Seung-A Baek
- Division of Life Sciences and Bio-Resource and Environmental Center, Incheon National University, Incheon, 22012, Republic of Korea
| | - Min-Kyoung You
- Department of Genetics and Biotechnology, College of Life Sciences, Kyung Hee University, Yongin, 17104, Republic of Korea
| | - Dongho Lee
- Department of Biotechnology, College of Life Sciences and Biotechnology, Korea University, Seoul, 02841, Republic of Korea
| | - Sun-Hyung Lim
- School of Biotechnology, Division of Horticultural Biotechnology, Hankyong National University, Anseong, 17579, Republic of Korea.
| | - Sun-Hwa Ha
- Department of Genetics and Biotechnology, College of Life Sciences, Kyung Hee University, Yongin, 17104, Republic of Korea.
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7
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Fernandes T, Melo F, Vieira MB, Lourenço TF, Pucciariello C, Saibo NJM, Abreu IA, Oliveira MM. Screening for Abiotic Stress Response in Rice. Methods Mol Biol 2022; 2494:161-194. [PMID: 35467207 DOI: 10.1007/978-1-0716-2297-1_12] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Rice (Oryza sativa L.) is the staple food for over half of the world population. However, most rice varieties are severely injured by abiotic stresses, with strong social and economic impacts. Understanding rice responses to stress may guide breeding for more tolerant varieties. However, the lack of consistency in the design of the stress experiments described in the literature limits comparative studies and output assessments. The use of identical setups is the only way to generate comparable data. This chapter comprises three sections, describing the experimental conditions established at the Genomics of Plant Stress (GPlantS) unit of ITQB NOVA to assess the response of rice plants to different abiotic stresses-high salinity, cold, drought, simulated drought, and submergence-and their recovery capacity when intended. All sections include a detailed description of the materials and methodology and useful notes gathered from our team experience. We use seedlings since rice plants at this stage show high sensitivity to abiotic stresses. For the salt, cold, and simulated drought (PEG, polyethylene glycol) stress assays, we grow rice seedlings in a hydroponic system, while for the drought assay, plants are grown in soil and subjected to water withholding. For submergence, we use water-filled Magenta boxes. All setups enable visual score determination and are suitable for sample collection during stress imposition and also recovery. The proposed methodologies are affordable and straightforward to implement in most labs, allowing the discrimination of several rice genotypes at the molecular and phenotypic levels.
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Affiliation(s)
- Telma Fernandes
- Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, Genomics of Plant Stress Unit, Oeiras, Portugal
| | - Fredilson Melo
- Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, Genomics of Plant Stress Unit, Oeiras, Portugal
| | - Maria Beatriz Vieira
- Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, Genomics of Plant Stress Unit, Oeiras, Portugal
| | - Tiago F Lourenço
- Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, Genomics of Plant Stress Unit, Oeiras, Portugal
| | - Chiara Pucciariello
- PlantLab, Institute of Life Sciences, Scuola Superiore Sant'Anna, Pisa, Italy
| | - Nelson J M Saibo
- Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, Genomics of Plant Stress Unit, Oeiras, Portugal
| | - Isabel A Abreu
- Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, Genomics of Plant Stress Unit, Oeiras, Portugal
| | - M Margarida Oliveira
- Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, Genomics of Plant Stress Unit, Oeiras, Portugal.
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Mo F, Li H, Li Y, Chen X, Wang M, Li Z, Deng N, Yang Y, Huang X, Zhang R, Deng W. Physiological, biochemical, and transcriptional regulation in a leguminous forage Trifolium pratense L. responding to silver ions. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2021; 162:531-546. [PMID: 33773229 DOI: 10.1016/j.plaphy.2021.02.046] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2021] [Accepted: 02/26/2021] [Indexed: 06/12/2023]
Abstract
Trifolium pratense L. (red clover) is an important leguminous crop with great potential for Ag-contaminated environment remediation. Whereas, the molecular mechanisms of Ag tolerance in red clover are largely unknown. Red clover seedlings were used for physiological and transcriptomic investigation under 0, 20, 50, and 100 mg/L Ag+ stress in our research to reveal potential molecular resistance mechanism. Research showed that red clover possessed fairly strong Ag absorbance capacity, the Ag level reached 0.14 and 2.35 mg/g·FW in the leaves and roots under 100 mg/L AgNO3 stress condition. Root fresh weight, root dry weight, root water content, and photosynthetic pigments contents were significantly decreased with elevating AgNO3 concentration. Obvious withered plant tissue, microstructure disorder, and disrupted organelles were observed. In vitro evaluations (e.g., PI and DCFH-DA staining) represented that AgNO3 at high concentration (100 mg/L) exhibited obvious inhibition on cell viability, which was due possibly to the induction of reactive oxygen species (ROS) accumulation. A total of 44643 differentially expressed genes (DEGs) were identified under Ag stress, covering 27155 upregulated and 17488 downregulated genes. 12 stress-responsive DEGs was authenticated utilizing real-time quantitative PCR (qRT-PCR). Gene ontology (GO) analysis revealed that the DEGs were mostly related to metal ion binding (molecular function), nucleus (cellular component), and defense response (biological process). Involved DEGs in sequence-specific DNA binding transcription factor activity, response to various hormones (e.g., abscisic acid, IAA/Auxin, salicylic acid, and etc), calcium signal transduction, and protein ubiquitination were concluded to play crucial roles in Ag tolerance of red clover. On the other hand, Kyoto Encyclopedia of Genes and Genomes (KEGG) database annotated several stress responsive pathways such as plant-pathogen interaction, phenylpropanoid biosynthesis, ubiquitin mediated proteolysis, hormone signal transduction, and autophagy. Several down-regulated genes (e.g., RSF2, RCD1, DOX1, and etc) were identified indicating possible metabolic disturbance. Besides, protein-protein interaction network (PPI) identified several pivotal genes such as ribosomal proteins, TIR, and ZAT.
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Affiliation(s)
- Fan Mo
- School of Resources and Civil Engineering, Northeastern University, 11 Wenhua Road, Heping District, Shenyang, 110819, China.
| | - Haibo Li
- School of Resources and Civil Engineering, Northeastern University, 11 Wenhua Road, Heping District, Shenyang, 110819, China.
| | - Yinghua Li
- School of Resources and Civil Engineering, Northeastern University, 11 Wenhua Road, Heping District, Shenyang, 110819, China.
| | - Xi Chen
- School of Resources and Civil Engineering, Northeastern University, 11 Wenhua Road, Heping District, Shenyang, 110819, China.
| | - Mingshuai Wang
- School of Resources and Civil Engineering, Northeastern University, 11 Wenhua Road, Heping District, Shenyang, 110819, China.
| | - Zhe Li
- School of Resources and Civil Engineering, Northeastern University, 11 Wenhua Road, Heping District, Shenyang, 110819, China.
| | - Ningcan Deng
- School of Resources and Civil Engineering, Northeastern University, 11 Wenhua Road, Heping District, Shenyang, 110819, China.
| | - Yue Yang
- School of Resources and Civil Engineering, Northeastern University, 11 Wenhua Road, Heping District, Shenyang, 110819, China.
| | - Xin Huang
- School of Resources and Civil Engineering, Northeastern University, 11 Wenhua Road, Heping District, Shenyang, 110819, China.
| | - Ran Zhang
- School of Resources and Civil Engineering, Northeastern University, 11 Wenhua Road, Heping District, Shenyang, 110819, China.
| | - Wenhe Deng
- School of Resources and Civil Engineering, Northeastern University, 11 Wenhua Road, Heping District, Shenyang, 110819, China.
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Yu T, Zhang J, Cao J, Cai Q, Li X, Sun Y, Li S, Li Y, Hu G, Cao S, Liu C, Wang G, Wang L, Duan Y. Leaf transcriptomic response mediated by cold stress in two maize inbred lines with contrasting tolerance levels. Genomics 2021; 113:782-794. [PMID: 33516847 DOI: 10.1016/j.ygeno.2021.01.018] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Revised: 01/10/2021] [Accepted: 01/25/2021] [Indexed: 11/29/2022]
Abstract
Maize (Zea mays L.) is a thermophilic plant and a minor drop in temperature can prolong the maturity period. Plants respond to cold stress through structural and functional modification in cell membranes as well as changes in the photosynthesis and energy metabolism. In order to understand the molecular mechanisms underlying cold tolerance and adaptation, we employed leaf transcriptome sequencing together with leaf microstructure and relative electrical conductivity measurements in two maize inbred lines, having different cold stress tolerance potentials. The leaf physiological and transcriptomic responses of maize seedlings were studied after growing both inbred lines at 5 °C for 0, 12 and 24 h. Differentially expressed genes were enriched in photosynthesis antenna proteins, MAPK signaling pathway, plant hormone signal transduction, circadian rhythm, secondary metabolites related pathways, ribosome, and proteasome. The seedlings of both genotypes employed common stress responsive pathways to respond to cold stress. However, the cold tolerant line B144 protected its photosystem II from photooxidation by upregulating D1 proteins. The sensitive line Q319 was unable to close its stomata. Collectively, B144 exhibited a cold tolerance owing to its ability to mediate changes in stomata opening as well as protecting photosystem. These results increase our understanding on the cold stress tolerance in maize seedlings and propose multiple key regulators of stress responses such as modifications in photosystem II, stomata guard cell opening and closing, changes in secondary metabolite biosynthesis, and circadian rhythm. This study also presents the signal transduction related changes in MAPK and phytohormone signaling pathways in response to cold stress during seedling stage of maize.
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Affiliation(s)
- Tao Yu
- Heilongjiang Academy of Agricultural Sciences Postdoctoral Programme, Harbin, 150086, Heilongjiang, China; Maize Research Institute of Heilongjiang Academy of Agricultural Sciences, Nangrang, Harbin, Heilongjiang, China
| | - Jianguo Zhang
- Heilongjiang Academy of Agricultural Sciences Postdoctoral Programme, Harbin, 150086, Heilongjiang, China; Maize Research Institute of Heilongjiang Academy of Agricultural Sciences, Nangrang, Harbin, Heilongjiang, China
| | - Jingsheng Cao
- Maize Research Institute of Heilongjiang Academy of Agricultural Sciences, Nangrang, Harbin, Heilongjiang, China.
| | - Quan Cai
- Maize Research Institute of Heilongjiang Academy of Agricultural Sciences, Nangrang, Harbin, Heilongjiang, China
| | - Xin Li
- Maize Research Institute of Heilongjiang Academy of Agricultural Sciences, Nangrang, Harbin, Heilongjiang, China
| | - Yan Sun
- Maize Research Institute of Heilongjiang Academy of Agricultural Sciences, Nangrang, Harbin, Heilongjiang, China
| | - Sinan Li
- Maize Research Institute of Heilongjiang Academy of Agricultural Sciences, Nangrang, Harbin, Heilongjiang, China
| | - Yunlong Li
- Maize Research Institute of Heilongjiang Academy of Agricultural Sciences, Nangrang, Harbin, Heilongjiang, China
| | - Guanghui Hu
- Maize Research Institute of Heilongjiang Academy of Agricultural Sciences, Nangrang, Harbin, Heilongjiang, China
| | - Shiliang Cao
- Maize Research Institute of Heilongjiang Academy of Agricultural Sciences, Nangrang, Harbin, Heilongjiang, China
| | - Changhua Liu
- College of Advanced Agriculture and Ecological Environment, Heilongjiang Academy of Agricultural Sciences, Nangang, Harbin, Heilongjiang, China
| | - Gangqing Wang
- Northeast Agricultural University, Harbin, Heilongjiang, China
| | - Lishan Wang
- College of Advanced Agriculture and Ecological Environment, Heilongjiang Academy of Agricultural Sciences, Nangang, Harbin, Heilongjiang, China
| | - Yajuan Duan
- College of Advanced Agriculture and Ecological Environment, Heilongjiang Academy of Agricultural Sciences, Nangang, Harbin, Heilongjiang, China
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Abbas F, Ke Y, Zhou Y, Yu Y, Waseem M, Ashraf U, Wang C, Wang X, Li X, Yue Y, Yu R, Fan Y. Genome-Wide Analysis Reveals the Potential Role of MYB Transcription Factors in Floral Scent Formation in Hedychium coronarium. FRONTIERS IN PLANT SCIENCE 2021; 12:623742. [PMID: 33719296 PMCID: PMC7952619 DOI: 10.3389/fpls.2021.623742] [Citation(s) in RCA: 40] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2020] [Accepted: 01/11/2021] [Indexed: 05/19/2023]
Abstract
The MYB gene family is one of the largest groups of transcription factors (TFs) playing diverse roles in several biological processes. Hedychium coronarium (white ginger lily) is a renowned ornamental plant both in tropical and subtropical regions due to its flower shape and strong floral scent mainly composed of terpenes and benzenoids. However, there is no information available regarding the role of the MYB gene family in H. coronarium. In the current study, the MYB gene family was identified and extensively analyzed. The identified 253 HcMYB genes were unevenly mapped on 17 chromosomes at a different density. Promoter sequence analysis showed numerous phytohormones related to cis-regulatory elements. The majority of HcMYB genes contain two to three introns and motif composition analysis showed their functional conservation. Phylogenetic analysis revealed that HcMYBs could be classified into 15 distinct clades, and the segmental duplication events played an essential role in the expansion of the HcMYB gene family. Tissue-specific expression patterns of HcMYB genes displayed spatial and temporal expression. Furthermore, seven HcMYB (HcMYB7/8/75/79/145/238/248) were selected for further investigation. Through RT-qPCR, the response of candidates HcMYB genes toward jasmonic acid methyl ester (MeJA), abscisic acid (ABA), ethylene, and auxin was examined. Yeast one-hybrid (Y1H) assays revealed that candidate genes directly bind to the promoter of bottom structural volatile synthesis genes (HcTPS1, HcTPS3, HcTPS10, and HcBSMT2). Moreover, yeast two-hybrid (Y2H) assay showed that HcMYB7/8/75/145/248 interact with HcJAZ1 protein. In HcMYB7/8/79/145/248-silenced flowers, the floral volatile contents were decreased and downregulated the expression of key structural genes, suggesting that these genes might play crucial roles in floral scent formation in H. coronarium by regulating the expression of floral scent biosynthesis genes. Collectively, these findings indicate that HcMYB genes might be involved in the regulatory mechanism of terpenoids and benzenoid biosynthesis in H. coronarium.
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Affiliation(s)
- Farhat Abbas
- The Research Center for Ornamental Plants, College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou, China
| | - Yanguo Ke
- The Research Center for Ornamental Plants, College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou, China
- College of Economics and Management, Kunming University, Kunming, China
| | - Yiwei Zhou
- The Research Center for Ornamental Plants, College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou, China
| | - Yunyi Yu
- The Research Center for Ornamental Plants, College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou, China
| | - Muhammad Waseem
- College of Horticulture, South China Agricultural University, Guangzhou, China
| | - Umair Ashraf
- Department of Botany, Division of Science and Technology, University of Education, Lahore, Punjab, Pakistan
| | - Chutian Wang
- The Research Center for Ornamental Plants, College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou, China
| | - Xiaoyu Wang
- The Research Center for Ornamental Plants, College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou, China
| | - Xinyue Li
- The Research Center for Ornamental Plants, College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou, China
| | - Yuechong Yue
- The Research Center for Ornamental Plants, College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou, China
| | - Rangcai Yu
- College of Life Sciences, South China Agricultural University, Guangzhou, China
| | - Yanping Fan
- The Research Center for Ornamental Plants, College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou, China
- Guangdong Key Laboratory for Innovative Development and Utilization of Forest Plant Germplasm, South China Agricultural University, Guangzhou, China
- *Correspondence: Yanping Fan,
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Tiwari P, Indoliya Y, Chauhan AS, Singh P, Singh PK, Singh PC, Srivastava S, Pande V, Chakrabarty D. Auxin-salicylic acid cross-talk ameliorates OsMYB-R1 mediated defense towards heavy metal, drought and fungal stress. JOURNAL OF HAZARDOUS MATERIALS 2020; 399:122811. [PMID: 32540701 DOI: 10.1016/j.jhazmat.2020.122811] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/09/2020] [Revised: 04/18/2020] [Accepted: 04/24/2020] [Indexed: 06/11/2023]
Abstract
The MYB TF family is an immensely large and functionally diverse class of proteins involved in the regulation of cell cycle, cell morphogenesis to stress signaling mechanism. The present study deciphered the hormonal cross-talk of wound inducible and stress-responsive OsMYB-R1 transcription factor in combating abiotic [Cr(VI) and drought/PEG] as well as biotic (Rhizoctonia solani) stress. OsMYB-R1 over-expressing rice transgenics exhibit a significant increase in lateral roots, which may be associated with increased tolerance under Cr(VI) and drought exposure. In contrast, its loss-of-function reduces stress tolerance. Higher auxin accumulation in the OsMYB-R1 over-expressed lines further strengthens the protective role of lateral roots under stress conditions. RNA-seq. data reveals over-representation of salicylic acid signaling molecule calcium-dependent protein kinases, which probably activate the stress-responsive downstream genes (Peroxidases, Glutathione S-transferases, Osmotins, Heat Shock Proteins, Pathogenesis Related-Proteins). Enzymatic studies further confirm OsMYB-R1 mediated robust antioxidant system as catalase, guaiacol peroxidase and superoxide dismutase activities were found to be increased in the over-expressed lines. Our results suggest that OsMYB-R1 is part of a complex network of transcription factors controlling the cross-talk of auxin and salicylic acid signaling and other genes in response to multiple stresses by modifying molecular signaling, internal cellular homeostasis and root morphology.
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Affiliation(s)
- Poonam Tiwari
- Molecular Biology and Biotechnology Division, CSIR-National Botanical Research Institute, Lucknow 226001, India; Department of Biotechnology, Kumaun University, Nainital 26300, India
| | - Yuvraj Indoliya
- Molecular Biology and Biotechnology Division, CSIR-National Botanical Research Institute, Lucknow 226001, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Abhishek Singh Chauhan
- Molecular Biology and Biotechnology Division, CSIR-National Botanical Research Institute, Lucknow 226001, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Puja Singh
- Molecular Biology and Biotechnology Division, CSIR-National Botanical Research Institute, Lucknow 226001, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Pradyumna Kumar Singh
- Molecular Biology and Biotechnology Division, CSIR-National Botanical Research Institute, Lucknow 226001, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
| | - Poonam C Singh
- Division of Microbial Technology, CSIR-National Botanical Research Institute, Lucknow, 226001, India
| | - Suchi Srivastava
- Division of Microbial Technology, CSIR-National Botanical Research Institute, Lucknow, 226001, India
| | - Veena Pande
- Department of Biotechnology, Kumaun University, Nainital 26300, India
| | - Debasis Chakrabarty
- Molecular Biology and Biotechnology Division, CSIR-National Botanical Research Institute, Lucknow 226001, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India.
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12
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Hong WJ, Jiang X, Ahn HR, Choi J, Kim SR, Jung KH. Systematic Analysis of Cold Stress Response and Diurnal Rhythm Using Transcriptome Data in Rice Reveals the Molecular Networks Related to Various Biological Processes. Int J Mol Sci 2020; 21:E6872. [PMID: 32961678 PMCID: PMC7554834 DOI: 10.3390/ijms21186872] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2020] [Revised: 09/14/2020] [Accepted: 09/17/2020] [Indexed: 11/16/2022] Open
Abstract
Rice (Oryza sativa L.), a staple crop plant that is a major source of calories for approximately 50% of the human population, exhibits various physiological responses against temperature stress. These responses are known mechanisms of flexible adaptation through crosstalk with the intrinsic circadian clock. However, the molecular regulatory network underlining this crosstalk remains poorly understood. Therefore, we performed systematic transcriptome data analyses to identify the genes involved in both cold stress responses and diurnal rhythmic patterns. Here, we first identified cold-regulated genes and then identified diurnal rhythmic genes from those (119 cold-upregulated and 346 cold-downregulated genes). We defined cold-responsive diurnal rhythmic genes as CD genes. We further analyzed the functional features of these CD genes through Gene Ontology and Kyoto Encyclopedia of Genes and Genomes enrichment analyses and performed a literature search to identify functionally characterized CD genes. Subsequently, we found that light-harvesting complex proteins involved in photosynthesis strongly associate with the crosstalk. Furthermore, we constructed a protein-protein interaction network encompassing four hub genes and analyzed the roles of the Stay-Green (SGR) gene in regulating crosstalk with sgr mutants. We predict that these findings will provide new insights in understanding the environmental stress response of crop plants against climate change.
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Affiliation(s)
- Woo-Jong Hong
- Graduate School of Biotechnology & Crop Biotech Institute, Kyung Hee University, Yongin 17104, Korea; (W.-J.H.); (X.J.); (H.R.A.)
| | - Xu Jiang
- Graduate School of Biotechnology & Crop Biotech Institute, Kyung Hee University, Yongin 17104, Korea; (W.-J.H.); (X.J.); (H.R.A.)
| | - Hye Ryun Ahn
- Graduate School of Biotechnology & Crop Biotech Institute, Kyung Hee University, Yongin 17104, Korea; (W.-J.H.); (X.J.); (H.R.A.)
| | - Juyoung Choi
- Department of Life Science, Sogang University, Seoul 04107, Korea;
| | - Seong-Ryong Kim
- Department of Life Science, Sogang University, Seoul 04107, Korea;
| | - Ki-Hong Jung
- Graduate School of Biotechnology & Crop Biotech Institute, Kyung Hee University, Yongin 17104, Korea; (W.-J.H.); (X.J.); (H.R.A.)
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Mmadi MA, Dossa K, Wang L, Zhou R, Wang Y, Cisse N, Sy MO, Zhang X. Functional Characterization of the Versatile MYB Gene Family Uncovered Their Important Roles in Plant Development and Responses to Drought and Waterlogging in Sesame. Genes (Basel) 2017; 8:genes8120362. [PMID: 29231869 PMCID: PMC5748680 DOI: 10.3390/genes8120362] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2017] [Revised: 11/22/2017] [Accepted: 11/29/2017] [Indexed: 12/02/2022] Open
Abstract
The MYB gene family constitutes one of the largest transcription factors (TFs) modulating various biological processes in plants. Although genome-wide analysis of this gene family has been carried out in some species, only three MYB members have been functionally characterized heretofore in sesame (Sesamum indicum L.). Here, we identified a relatively high number (287) of sesame MYB genes (SIMYBs) with an uncommon overrepresentation of the 1R-subfamily. A total of 95% of SIMYBs was mapped unevenly onto the 16 linkage groups of the sesame genome with 55 SIMYBs tandemly duplicated. In addition, molecular characterization, gene structure, and evolutionary relationships of SIMYBs were established. Based on the close relationship between sesame and Arabidopsis thaliana, we uncovered that the functions of SIMYBs are highly diverse. A total of 65% of SIMYBs were commonly detected in five tissues, suggesting that they represent key TFs modulating sesame growth and development. Moreover, we found that SIMYBs regulate sesame responses to drought and waterlogging, which highlights the potential of SIMYBs towards improving stress tolerance in sesame. This work presents a comprehensive picture of the MYB gene family in sesame and paves the way for further functional validation of the members of this versatile gene family.
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Affiliation(s)
- Marie Ali Mmadi
- Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences, Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture, Wuhan 430062, China.
- Centre d'Etudes Régional pour l'Amélioration de l'Adaptation à la Sécheresse (CERAAS), BP 3320, Thiès, Senegal.
- Laboratoire Campus de Biotechnologies Végétales, Département de Biologie Végétale, Faculté des Sciences et Techniques, Université Cheikh Anta Diop, 107000 Dakar, Senegal.
| | - Komivi Dossa
- Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences, Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture, Wuhan 430062, China.
- Centre d'Etudes Régional pour l'Amélioration de l'Adaptation à la Sécheresse (CERAAS), BP 3320, Thiès, Senegal.
- Laboratoire Campus de Biotechnologies Végétales, Département de Biologie Végétale, Faculté des Sciences et Techniques, Université Cheikh Anta Diop, 107000 Dakar, Senegal.
| | - Linhai Wang
- Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences, Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture, Wuhan 430062, China.
| | - Rong Zhou
- Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences, Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture, Wuhan 430062, China.
| | - Yanyan Wang
- Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences, Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture, Wuhan 430062, China.
| | - Ndiaga Cisse
- Centre d'Etudes Régional pour l'Amélioration de l'Adaptation à la Sécheresse (CERAAS), BP 3320, Thiès, Senegal.
| | - Mame Oureye Sy
- Laboratoire Campus de Biotechnologies Végétales, Département de Biologie Végétale, Faculté des Sciences et Techniques, Université Cheikh Anta Diop, 107000 Dakar, Senegal.
| | - Xiurong Zhang
- Oil Crops Research Institute of the Chinese Academy of Agricultural Sciences, Key Laboratory of Biology and Genetic Improvement of Oil Crops, Ministry of Agriculture, Wuhan 430062, China.
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Kim SW, Lee SK, Jeong HJ, An G, Jeon JS, Jung KH. Crosstalk between diurnal rhythm and water stress reveals an altered primary carbon flux into soluble sugars in drought-treated rice leaves. Sci Rep 2017; 7:8214. [PMID: 28811563 PMCID: PMC5557844 DOI: 10.1038/s41598-017-08473-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2016] [Accepted: 06/30/2017] [Indexed: 12/13/2022] Open
Abstract
Plants retain rhythmic physiological responses when adapting to environmental challenges. However, possible integrations between drought conditions and those responses have not received much focus, especially regarding crop plants, and the relationship between abiotic stress and the diurnal cycle is generally not considered. Therefore, we conducted a genome-wide analysis to identify genes showing both diurnal regulation and water-deficiency response in rice (Oryza sativa). Among the 712 drought-responsive genes primary identified, 56.6% are diurnally expressed while 47.6% of the 761 that are down-regulated by drought are also diurnal. Using the β-glucuronidase reporter system and qRT-PCR analyses, we validated expression patterns of two candidate genes, thereby supporting the reliability of our transcriptome data. MapMan analysis indicated that diurnal genes up-regulated by drought are closely associated with the starch-sucrose pathway while those that are down-regulated are involved in photosynthesis. We then confirmed that starch-sucrose contents and chlorophyll fluorescence are altered in a diurnal manner under drought stress, suggesting these metabolic diurnal alterations as a novel indicator to evaluate the drought response in rice leaves. We constructed a functional gene network associated with the starch-sucrose KEGG metabolic pathway for further functional studies, and also developed a regulatory pathway model that includes OsbZIP23 transcription factor.
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Affiliation(s)
- Seo-Woo Kim
- Graduate School of Biotechnology & Crop Biotech Institute, Kyung Hee University, Yongin, 17104, Korea
| | - Sang-Kyu Lee
- Graduate School of Biotechnology & Crop Biotech Institute, Kyung Hee University, Yongin, 17104, Korea
| | - Hee-Jeong Jeong
- Graduate School of Biotechnology & Crop Biotech Institute, Kyung Hee University, Yongin, 17104, Korea
| | - Gynheung An
- Graduate School of Biotechnology & Crop Biotech Institute, Kyung Hee University, Yongin, 17104, Korea
| | - Jong-Seong Jeon
- Graduate School of Biotechnology & Crop Biotech Institute, Kyung Hee University, Yongin, 17104, Korea.
| | - Ki-Hong Jung
- Graduate School of Biotechnology & Crop Biotech Institute, Kyung Hee University, Yongin, 17104, Korea.
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15
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Lv Y, Yang M, Hu D, Yang Z, Ma S, Li X, Xiong L. The OsMYB30 Transcription Factor Suppresses Cold Tolerance by Interacting with a JAZ Protein and Suppressing β-Amylase Expression. PLANT PHYSIOLOGY 2017; 173:1475-1491. [PMID: 28062835 PMCID: PMC5291022 DOI: 10.1104/pp.16.01725] [Citation(s) in RCA: 90] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/10/2016] [Accepted: 01/03/2017] [Indexed: 05/17/2023]
Abstract
Cold stress is one of the major limiting factors for rice (Oryza sativa) productivity. Several MYB transcriptional factors have been reported as important regulators in the cold stress response, but the molecular mechanisms are largely unknown. In this study, we characterized a cold-responsive R2R3-type MYB gene, OsMYB30, for its regulatory function in cold tolerance in rice. Functional analysis revealed that overexpression of OsMYB30 in rice resulted in increased cold sensitivity, while the osmyb30 knockout mutant showed increased cold tolerance. Microarray and quantitative real-time polymerase chain reaction analyses revealed that a few β-amylase (BMY) genes were down-regulated by OsMYB30. The BMY activity and maltose content, which were decreased and increased in the OsMYB30 overexpression and osmyb30 knockout mutant, respectively, were correlated with the expression patterns of the BMY genes. OsMYB30 was shown to bind to the promoters of the BMY genes. These results suggested that OsMYB30 exhibited a regulatory effect on the breakdown of starch through the regulation of the BMY genes. In addition, application of maltose had a protective effect for cell membranes under cold stress conditions. Furthermore, we identified an OsMYB30-interacting protein, OsJAZ9, that had a significant effect in suppressing the transcriptional activation of OsMYB30 and in the repression of BMY genes mediated by OsMYB30. These results together suggested that OsMYB30 might be a novel regulator of cold tolerance through the negative regulation of the BMY genes by interacting with OsJAZ9 to fine-tune the starch breakdown and the content of maltose, which might contribute to the cold tolerance as a compatible solute.
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Affiliation(s)
- Yan Lv
- National Key Laboratory of Crop Genetic Improvement and National Center of Plant Gene Research (Wuhan), Huazhong Agricultural University, Wuhan 430070, China
| | - Mei Yang
- National Key Laboratory of Crop Genetic Improvement and National Center of Plant Gene Research (Wuhan), Huazhong Agricultural University, Wuhan 430070, China
| | - Dan Hu
- National Key Laboratory of Crop Genetic Improvement and National Center of Plant Gene Research (Wuhan), Huazhong Agricultural University, Wuhan 430070, China
| | - Zeyu Yang
- National Key Laboratory of Crop Genetic Improvement and National Center of Plant Gene Research (Wuhan), Huazhong Agricultural University, Wuhan 430070, China
| | - Siqi Ma
- National Key Laboratory of Crop Genetic Improvement and National Center of Plant Gene Research (Wuhan), Huazhong Agricultural University, Wuhan 430070, China
| | - Xianghua Li
- National Key Laboratory of Crop Genetic Improvement and National Center of Plant Gene Research (Wuhan), Huazhong Agricultural University, Wuhan 430070, China
| | - Lizhong Xiong
- National Key Laboratory of Crop Genetic Improvement and National Center of Plant Gene Research (Wuhan), Huazhong Agricultural University, Wuhan 430070, China
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Shi L, Guo M, Ye N, Liu Y, Liu R, Xia Y, Cui S, Zhang J. Reduced ABA Accumulation in the Root System is Caused by ABA Exudation in Upland Rice (Oryza sativa L. var. Gaoshan1) and this Enhanced Drought Adaptation. ACTA ACUST UNITED AC 2015; 56:951-64. [DOI: 10.1093/pcp/pcv022] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2014] [Accepted: 02/04/2015] [Indexed: 12/19/2022]
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