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Wang Y, Li D, Gao J, Li X, Zhang R, Jin X, Hu Z, Zheng B, Persson S, Chen P. The 2'-O-methyladenosine nucleoside modification gene OsTRM13 positively regulates salt stress tolerance in rice. JOURNAL OF EXPERIMENTAL BOTANY 2017; 68:1479-1491. [PMID: 28369540 PMCID: PMC5444449 DOI: 10.1093/jxb/erx061] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Stress induces changes of modified nucleosides in tRNA, and these changes can influence codon-anticodon interaction and therefore the translation of target proteins. Certain nucleoside modification genes are associated with regulation of stress tolerance and immune response in plants. In this study, we found a dramatic increase of 2'-O-methyladenosine (Am) nucleoside in rice seedlings subjected to salt stress and abscisic acid (ABA) treatment. We identified LOC_Os03g61750 (OsTRM13) as a rice candidate methyltransferase for the Am modification. OsTRM13 transcript levels increased significantly upon salt stress and ABA treatment, and the OsTrm13 protein was found to be located primarily to the nucleus. More importantly, OsTRM13 overexpression plants displayed improved salt stress tolerance, and vice versa, OsTRM13 RNA interference (RNAi) plants showed reduced tolerance. Furthermore, OsTRM13 complemented a yeast trm13Δ mutant, deficient in Am synthesis, and the purified OsTrm13 protein catalysed Am nucleoside formation on tRNA-Gly-GCC in vitro. Our results show that OsTRM13, encoding a rice tRNA nucleoside methyltransferase, is an important regulator of salt stress tolerance in rice.
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Affiliation(s)
- Youmei Wang
- College of Plant Science and Technology, HuaZhong Agricultural University, Wuhan 430070, China
- Biomass and Bioenergy Research Centre, HuaZhong Agricultural University, Wuhan 430070, China
| | - Dongqin Li
- College of Life Science, HuaZhong Agricultural University, Wuhan 430070, China
| | - Junbao Gao
- College of Plant Science and Technology, HuaZhong Agricultural University, Wuhan 430070, China
- Biomass and Bioenergy Research Centre, HuaZhong Agricultural University, Wuhan 430070, China
| | - Xukai Li
- College of Plant Science and Technology, HuaZhong Agricultural University, Wuhan 430070, China
- Biomass and Bioenergy Research Centre, HuaZhong Agricultural University, Wuhan 430070, China
| | - Rui Zhang
- College of Plant Science and Technology, HuaZhong Agricultural University, Wuhan 430070, China
- Biomass and Bioenergy Research Centre, HuaZhong Agricultural University, Wuhan 430070, China
| | - Xiaohuan Jin
- College of Plant Science and Technology, HuaZhong Agricultural University, Wuhan 430070, China
- Biomass and Bioenergy Research Centre, HuaZhong Agricultural University, Wuhan 430070, China
| | - Zhen Hu
- College of Plant Science and Technology, HuaZhong Agricultural University, Wuhan 430070, China
- Biomass and Bioenergy Research Centre, HuaZhong Agricultural University, Wuhan 430070, China
| | - Bo Zheng
- College of Horticulture and Forestry Sciences, HuaZhong Agricultural University, Wuhan 430070, China
| | - Staffan Persson
- College of Plant Science and Technology, HuaZhong Agricultural University, Wuhan 430070, China
- Biomass and Bioenergy Research Centre, HuaZhong Agricultural University, Wuhan 430070, China
- School of Biosciences, University of Melbourne, Parkville 3010 VIC, Australia
| | - Peng Chen
- College of Plant Science and Technology, HuaZhong Agricultural University, Wuhan 430070, China
- Biomass and Bioenergy Research Centre, HuaZhong Agricultural University, Wuhan 430070, China
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Li J, Li Y, Yin Z, Jiang J, Zhang M, Guo X, Ye Z, Zhao Y, Xiong H, Zhang Z, Shao Y, Jiang C, Zhang H, An G, Paek N, Ali J, Li Z. OsASR5 enhances drought tolerance through a stomatal closure pathway associated with ABA and H 2 O 2 signalling in rice. PLANT BIOTECHNOLOGY JOURNAL 2017; 15:183-196. [PMID: 27420922 PMCID: PMC5258865 DOI: 10.1111/pbi.12601] [Citation(s) in RCA: 115] [Impact Index Per Article: 16.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2016] [Revised: 06/28/2016] [Accepted: 07/06/2016] [Indexed: 05/18/2023]
Abstract
Drought is one of the major abiotic stresses that directly implicate plant growth and crop productivity. Although many genes in response to drought stress have been identified, genetic improvement to drought resistance especially in food crops is showing relatively slow progress worldwide. Here, we reported the isolation of abscisic acid, stress and ripening (ASR) genes from upland rice variety, IRAT109 (Oryza sativa L. ssp. japonica), and demonstrated that overexpression of OsASR5 enhanced osmotic tolerance in Escherichia coli and drought tolerance in Arabidopsis and rice by regulating leaf water status under drought stress conditions. Moreover, overexpression of OsASR5 in rice increased endogenous ABA level and showed hypersensitive to exogenous ABA treatment at both germination and postgermination stages. The production of H2 O2 , a second messenger for the induction of stomatal closure in response to ABA, was activated in overexpression plants under drought stress conditions, consequently, increased stomatal closure and decreased stomatal conductance. In contrast, the loss-of-function mutant, osasr5, showed sensitivity to drought stress with lower relative water content under drought stress conditions. Further studies demonstrated that OsASR5 functioned as chaperone-like protein and interacted with stress-related HSP40 and 2OG-Fe (II) oxygenase domain containing proteins in yeast and plants. Taken together, we suggest that OsASR5 plays multiple roles in response to drought stress by regulating ABA biosynthesis, promoting stomatal closure, as well as acting as chaperone-like protein that possibly prevents drought stress-related proteins from inactivation.
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Affiliation(s)
- Jinjie Li
- Key Lab of Crop Heterosis and Utilization of Ministry of Education and Beijing Key Lab of Crop Genetic ImprovementChina Agricultural UniversityBeijingPeople's Republic of China
| | - Yang Li
- Key Lab of Crop Heterosis and Utilization of Ministry of Education and Beijing Key Lab of Crop Genetic ImprovementChina Agricultural UniversityBeijingPeople's Republic of China
| | - Zhigang Yin
- Key Lab of Crop Heterosis and Utilization of Ministry of Education and Beijing Key Lab of Crop Genetic ImprovementChina Agricultural UniversityBeijingPeople's Republic of China
| | - Jihong Jiang
- Key Lab of Crop Heterosis and Utilization of Ministry of Education and Beijing Key Lab of Crop Genetic ImprovementChina Agricultural UniversityBeijingPeople's Republic of China
| | - Minghui Zhang
- Key Lab of Crop Heterosis and Utilization of Ministry of Education and Beijing Key Lab of Crop Genetic ImprovementChina Agricultural UniversityBeijingPeople's Republic of China
| | - Xiao Guo
- Key Lab of Crop Heterosis and Utilization of Ministry of Education and Beijing Key Lab of Crop Genetic ImprovementChina Agricultural UniversityBeijingPeople's Republic of China
| | - Zhujia Ye
- Key Lab of Crop Heterosis and Utilization of Ministry of Education and Beijing Key Lab of Crop Genetic ImprovementChina Agricultural UniversityBeijingPeople's Republic of China
| | - Yan Zhao
- Key Lab of Crop Heterosis and Utilization of Ministry of Education and Beijing Key Lab of Crop Genetic ImprovementChina Agricultural UniversityBeijingPeople's Republic of China
| | - Haiyan Xiong
- Key Lab of Crop Heterosis and Utilization of Ministry of Education and Beijing Key Lab of Crop Genetic ImprovementChina Agricultural UniversityBeijingPeople's Republic of China
| | - Zhanying Zhang
- Key Lab of Crop Heterosis and Utilization of Ministry of Education and Beijing Key Lab of Crop Genetic ImprovementChina Agricultural UniversityBeijingPeople's Republic of China
| | - Yujie Shao
- Key Lab of Crop Heterosis and Utilization of Ministry of Education and Beijing Key Lab of Crop Genetic ImprovementChina Agricultural UniversityBeijingPeople's Republic of China
| | - Conghui Jiang
- Key Lab of Crop Heterosis and Utilization of Ministry of Education and Beijing Key Lab of Crop Genetic ImprovementChina Agricultural UniversityBeijingPeople's Republic of China
| | - Hongliang Zhang
- Key Lab of Crop Heterosis and Utilization of Ministry of Education and Beijing Key Lab of Crop Genetic ImprovementChina Agricultural UniversityBeijingPeople's Republic of China
| | - Gynheung An
- Department of Plant Systems Biotech and Crop Biotech InstituteKyung Hee UniversityYonginKorea
| | - Nam‐Chon Paek
- Department of Plant Science, Plant Genomics and Breeding InstituteResearch Institute for Agriculture and Life SciencesSeoul National UniversitySeoulKorea
| | - Jauhar Ali
- International Rice Research InstituteMetro ManilaPhilippines
| | - Zichao Li
- Key Lab of Crop Heterosis and Utilization of Ministry of Education and Beijing Key Lab of Crop Genetic ImprovementChina Agricultural UniversityBeijingPeople's Republic of China
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Qu L, Wu C, Zhang F, Wu Y, Fang C, Jin C, Liu X, Luo J. Rice putative methyltransferase gene OsTSD2 is required for root development involving pectin modification. JOURNAL OF EXPERIMENTAL BOTANY 2016; 67:5349-5362. [PMID: 27497286 PMCID: PMC5049386 DOI: 10.1093/jxb/erw297] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Pectin synthesis and modification are vital for plant development, although the underlying mechanisms are still not well understood. Here, we report the functional characterization of the OsTSD2 gene, which encodes a putative methyltransferase in rice. All three independent T-DNA insertion lines of OsTSD2 displayed dwarf phenotypes and serial alterations in different zones of the root. These alterations included abnormal cellular adhesion and schizogenous aerenchyma formation in the meristematic zone, inhibited root elongation in the elongation zone, and higher lateral root density in the mature zone. Immunofluorescence (with LM19) and Ruthenium Red staining of the roots showed that unesterified homogalacturonan (HG) was increased in Ostsd2 mutants. Biochemical analysis of cell wall pectin polysaccharides revealed that both the monosaccharide composition and the uronic acid content were decreased in Ostsd2 mutants. Increased endogenous ABA content and opposite roles performed by ABA and IAA in regulating cellular adhesion in the Ostsd2 mutants suggested that OsTSD2 is required for root development in rice through a pathway involving pectin synthesis/modification. A hypothesis to explain the relationship among OsTSD2, pectin methylesterification, and root development is proposed, based on pectin's function in regional cell extension/division in a zone-dependent manner.
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Affiliation(s)
- Lianghuan Qu
- National Key Laboratory of Crop Genetic Improvement and National Center of Plant Gene Research (Wuhan), Huazhong Agricultural University, Wuhan 430070, China College of Life Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Chunyan Wu
- National Key Laboratory of Crop Genetic Improvement and National Center of Plant Gene Research (Wuhan), Huazhong Agricultural University, Wuhan 430070, China
| | - Fei Zhang
- National Key Laboratory of Crop Genetic Improvement and National Center of Plant Gene Research (Wuhan), Huazhong Agricultural University, Wuhan 430070, China
| | - Yangyang Wu
- National Key Laboratory of Crop Genetic Improvement and National Center of Plant Gene Research (Wuhan), Huazhong Agricultural University, Wuhan 430070, China
| | - Chuanying Fang
- National Key Laboratory of Crop Genetic Improvement and National Center of Plant Gene Research (Wuhan), Huazhong Agricultural University, Wuhan 430070, China
| | - Cheng Jin
- National Key Laboratory of Crop Genetic Improvement and National Center of Plant Gene Research (Wuhan), Huazhong Agricultural University, Wuhan 430070, China
| | - Xianqing Liu
- College of Life Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Jie Luo
- 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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54
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Nguyen D, D'Agostino N, Tytgat TOG, Sun P, Lortzing T, Visser EJW, Cristescu SM, Steppuhn A, Mariani C, van Dam NM, Rieu I. Drought and flooding have distinct effects on herbivore-induced responses and resistance in Solanum dulcamara. PLANT, CELL & ENVIRONMENT 2016; 39:1485-99. [PMID: 26759219 DOI: 10.1111/pce.12708] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2015] [Accepted: 12/28/2015] [Indexed: 05/20/2023]
Abstract
In the field, biotic and abiotic stresses frequently co-occur. As a consequence, common molecular signalling pathways governing adaptive responses to individual stresses can interact, resulting in compromised phenotypes. How plant signalling pathways interact under combined stresses is poorly understood. To assess this, we studied the consequence of drought and soil flooding on resistance of Solanum dulcamara to Spodoptera exigua and their effects on hormonal and transcriptomic profiles. The results showed that S. exigua larvae performed less well on drought-stressed plants than on well-watered and flooded plants. Both drought and insect feeding increased abscisic acid and jasmonic acid (JA) levels, whereas flooding did not induce JA accumulation. RNA sequencing analyses corroborated this pattern: drought and herbivory induced many biological processes that were repressed by flooding. When applied in combination, drought and herbivory had an additive effect on specific processes involved in secondary metabolism and defence responses, including protease inhibitor activity. In conclusion, drought and flooding have distinct effects on herbivore-induced responses and resistance. Especially, the interaction between abscisic acid and JA signalling may be important to optimize plant responses to combined drought and insect herbivory, making drought-stressed plants more resistant to insects than well-watered and flooded plants.
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Affiliation(s)
- Duy Nguyen
- Department of Molecular Plant Physiology, Institute for Water and Wetland Research, Radboud University, 6500, GL, Nijmegen, The Netherlands
| | - Nunzio D'Agostino
- Consiglio per la ricerca in agricoltura e l'analisi dell'economia agraria, Centro di ricerca per l'orticoltura, 84098, Pontecagnano, (SA), Italy
| | - Tom O G Tytgat
- Department of Molecular Plant Physiology, Institute for Water and Wetland Research, Radboud University, 6500, GL, Nijmegen, The Netherlands
| | - Pulu Sun
- Department of Molecular Plant Physiology, Institute for Water and Wetland Research, Radboud University, 6500, GL, Nijmegen, The Netherlands
- Laboratoire de Biotechnologies Végétales Appliquées aux Plantes Aromatiques et Médicinales, Université Jean Monnet, 42023, Saint-Etienne, France
| | - Tobias Lortzing
- Molecular Ecology Group, Dahlem Centre of Plant Sciences, Freie Universität Berlin, 12163, Berlin, Germany
| | - Eric J W Visser
- Department of Experimental Plant Ecology, Institute for Water and Wetland Research, Radboud University, 6500, GL, Nijmegen, The Netherlands
| | - Simona M Cristescu
- Department of Molecular and Laser Physics, Institute for Molecules and Materials, Radboud University, 6500, GL, Nijmegen, The Netherlands
| | - Anke Steppuhn
- Molecular Ecology Group, Dahlem Centre of Plant Sciences, Freie Universität Berlin, 12163, Berlin, Germany
| | - Celestina Mariani
- Department of Molecular Plant Physiology, Institute for Water and Wetland Research, Radboud University, 6500, GL, Nijmegen, The Netherlands
| | - Nicole M van Dam
- Department of Molecular Plant Physiology, Institute for Water and Wetland Research, Radboud University, 6500, GL, Nijmegen, The Netherlands
- German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, 04103, Leipzig, Germany
- Institute of Ecology, Friedrich Schiller University Jena, 07743, Jena, Germany
| | - Ivo Rieu
- Department of Molecular Plant Physiology, Institute for Water and Wetland Research, Radboud University, 6500, GL, Nijmegen, The Netherlands
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55
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Xu H, Watanabe KA, Zhang L, Shen QJ. WRKY transcription factor genes in wild rice Oryza nivara. DNA Res 2016; 23:311-23. [PMID: 27345721 PMCID: PMC4991837 DOI: 10.1093/dnares/dsw025] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2015] [Accepted: 05/18/2016] [Indexed: 11/26/2022] Open
Abstract
The WRKY transcription factor family is one of the largest gene families involved in plant development and stress response. Although many WRKY genes have been studied in cultivated rice (Oryza sativa), the WRKY genes in the wild rice species Oryza nivara, the direct progenitor of O. sativa, have not been studied. O. nivara shows abundant genetic diversity and elite drought and disease resistance features. Herein, a total of 97 O. nivara WRKY (OnWRKY) genes were identified. RNA-sequencing demonstrates that OnWRKY genes were generally expressed at higher levels in the roots of 30-day-old plants. Bioinformatic analyses suggest that most of OnWRKY genes could be induced by salicylic acid, abscisic acid, and drought. Abundant potential MAPK phosphorylation sites in OnWRKYs suggest that activities of most OnWRKYs can be regulated by phosphorylation. Phylogenetic analyses of OnWRKYs support a novel hypothesis that ancient group IIc OnWRKYs were the original ancestors of only some group IIc and group III WRKYs. The analyses also offer strong support that group IIc OnWRKYs containing the HVE sequence in their zinc finger motifs were derived from group Ia WRKYs. This study provides a solid foundation for the study of the evolution and functions of WRKY genes in O. nivara.
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Affiliation(s)
- Hengjian Xu
- School of Life Sciences, Shandong University of Technology, Zibo 255000, Shandong Province, People's Republic of China School of Life Sciences, University of Nevada Las Vegas, Las Vegas, NV 89154, USA
| | - Kenneth A Watanabe
- School of Life Sciences, University of Nevada Las Vegas, Las Vegas, NV 89154, USA
| | - Liyuan Zhang
- School of Life Sciences, University of Nevada Las Vegas, Las Vegas, NV 89154, USA
| | - Qingxi J Shen
- School of Life Sciences, University of Nevada Las Vegas, Las Vegas, NV 89154, USA
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Rai V, Sarkar S, Satpati S, Dey N. Overexpression of human peroxisomal enoyl-CoA delta isomerase2 HsPECI2, an ortholog of bamboo expressed during gregarious flowering alters salinity stress responses and polar lipid content in tobacco. FUNCTIONAL PLANT BIOLOGY : FPB 2016; 43:232-243. [PMID: 32480456 DOI: 10.1071/fp15292] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2015] [Accepted: 11/20/2015] [Indexed: 06/11/2023]
Abstract
Peroxisomal enoyl-CoA delta isomerase2 (PECI2) is one of the key enzymes that has critical role in lipid metabolism and plant development during salt stress. Seven out of ten tobacco plants overexpressing human PECI2 (HsPECI2) with PTS1-sequence showed hypersensitivity to salt. Under salt-stress, T2 transformed plants (HsPECI2) displayed reduced primary root, delayed shoot-growth, and visibly smaller rosette leaves turning pale yellow as compared to the pKYLX71 vector control plant. Also, we found altered reactive oxygen species (ROS) levels and reduced catalase activity in 100mM sodium chloride (NaCl) treated HsPECI2 transformed plant compared with the pKYLX71 counterpart. ESI-MS/MS data showed that the polar lipids were differentially modulated upon salt treatment in HsPECI2 transformed and pKYLX71 plants as compared with the respective untreated counterpart. Notably, the levels of monogalactosyldiacylglycerol and phosphatidic acid varied significantly, whereas phosphatidylcholine, phosphatidylserine and digalactosyldiacylglycerol contents were moderately upregulated. In parallel, abscisic acid (ABA) responsiveness assay confirmed insensitivity of HsPECI2 transformed plant towards ABA. Overall our data proclaim that HsPECI2 play multifunctional role in normal development and response to salinity stress apart from its primary role in β-oxidation.
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Affiliation(s)
- Vineeta Rai
- Division of Gene Function and Regulation, Institute of Life Sciences, Nalco Square, Bhubaneswar, 751023, Odisha, India
| | - Shayan Sarkar
- Division of Gene Function and Regulation, Institute of Life Sciences, Nalco Square, Bhubaneswar, 751023, Odisha, India
| | - Suresh Satpati
- Division of Translational Research and Technology Development, Institute of Life Sciences, Nalco Square, Bhubaneswar, 751023, Odisha, India
| | - Nrisingha Dey
- Division of Gene Function and Regulation, Institute of Life Sciences, Nalco Square, Bhubaneswar, 751023, Odisha, India
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Lu Q, Zhang M, Niu X, Wang C, Xu Q, Feng Y, Wang S, Yuan X, Yu H, Wang Y, Wei X. Uncovering novel loci for mesocotyl elongation and shoot length in indica rice through genome-wide association mapping. PLANTA 2016; 243:645-57. [PMID: 26612069 PMCID: PMC4757631 DOI: 10.1007/s00425-015-2434-x] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2015] [Accepted: 11/15/2015] [Indexed: 05/06/2023]
Abstract
Totally, 23 loci were detected, and 383 candidate genes were identified, and four of these candidate genes, Os01g0392100, Os04g0630000, Os01g0904700 and Os07g0615000, were regarded as promising targets. Direct-seeding cultivation is becoming popular in rice (Oryza sativa L.)-planting countries because it is labor- and time-efficient. However, low seedling establishment and slow seedling emergence have restricted the application and popularity of the technique. Mesocotyl elongation and shoot length are two important traits that can enhance rice seedling emergence. A single nucleotide polymorphism (SNP) is a genome sequence variation caused by a single base within a population, and SNPs evenly distributed throughout the genomes of plant species. In this study, a genome-wide association study (GWAS), based on 4136 SNPs, was performed using a compressed mixed linear model that accounted for population structure and relative kinship to detect novel loci for the two traits. Totally, 23 loci were identified, including five loci located known QTLs region. For the mesocotyl elongation, 17 major loci were identified, explaining ~19.31 % of the phenotypic variation. For the shoot length, six major loci were detected, explaining ~ 39.79 % of the phenotypic variation. In total, 383 candidate genes were included in a 200-kb genomic region (± 100 kb of each locus). Additionally, 32 SNPs were identified in 30 candidate genes. Relative expression level analyses indicated that four candidate genes containing SNP variations, Os01g0392100, Os04g0630000, Os01g0904700 and Os07g0615000, represented promising targets. Finally, eight elite accessions with long mesocotyl and shoot lengths were chosen as breeding donors for further rice direct-seeding variety modifications.
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Affiliation(s)
- Qing Lu
- State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou, 310006, China.
| | - Mengchen Zhang
- State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou, 310006, China.
| | - Xiaojun Niu
- State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou, 310006, China.
| | - Caihong Wang
- State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou, 310006, China.
| | - Qun Xu
- State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou, 310006, China.
| | - Yue Feng
- State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou, 310006, China.
| | - Shan Wang
- State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou, 310006, China.
| | - Xiaoping Yuan
- State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou, 310006, China.
| | - Hanyong Yu
- State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou, 310006, China.
| | - Yiping Wang
- State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou, 310006, China.
| | - Xinghua Wei
- State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou, 310006, China.
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Comparative analysis of gene expression in response to cold stress in diverse rice genotypes. Biochem Biophys Res Commun 2016; 471:253-9. [PMID: 26855133 DOI: 10.1016/j.bbrc.2016.02.004] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2016] [Accepted: 02/01/2016] [Indexed: 12/11/2022]
Abstract
Cold stress is a major factor affecting rice (Oryza sativa) growth and productivity, limiting its distribution worldwide. Rice production is affected primarily due to its vulnerability to cold stress at seedling stage, as well as reproductive stage leading to spikelet sterility. We report here the analysis of 21 diverse rice genotypes from the USDA mini-core collection for cold tolerance and categorized their tolerance levels on the basis of reduction in growth measured by root and shoot length. The screening identified 12 cold tolerant genotypes from which six tolerant genotypes were characterized at the vegetative stage for cold tolerance and gas-exchange parameters. Two tolerant and two sensitive genotypes were used further for gene expression analysis. Lipid Transfer Protein (LTP) genes showed a clear difference in expression between cold tolerant and sensitive genotypes suggesting that they are good candidates for engineering cold tolerance in rice. Nipponbare was identified as a cold tolerant genotype with stress tolerance mechanism potentially operating via both ABA dependent and independent pathways.
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Zhou T, Hua Y, Huang Y, Ding G, Shi L, Xu F. Physiological and Transcriptional Analyses Reveal Differential Phytohormone Responses to Boron Deficiency in Brassica napus Genotypes. FRONTIERS IN PLANT SCIENCE 2016; 7:221. [PMID: 26952137 PMCID: PMC4767905 DOI: 10.3389/fpls.2016.00221] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2015] [Accepted: 02/09/2016] [Indexed: 05/02/2023]
Abstract
Phytohormones play pivotal roles in the response of plants to various biotic and abiotic stresses. Boron (B) is an essential microelement for plants, and Brassica napus (B. napus) is hypersensitive to B deficiency. However, how auxin responds to B deficiency remained a dilemma for many years and little is known about how other phytohormones respond to B deficiency. The identification of B-efficient/inefficient B. napus indicates that breeding might overcome these constraints in the agriculture production. Here, we seek to identify phytohormone-related processes underlying B-deficiency tolerance in B. napus at the physiological and gene expression levels. Our study indicated low-B reduced indole-3-acetic acid (IAA) concentration in both the shoots and roots of B. napus, and affected the expression of the auxin biosynthesis gene BnNIT1 and the efflux gene BnPIN1 in a time-dependent manner. Low-B increased the jasmonates (JAs) and abscisic acid (ABA) concentrations and induced the expression of the ABA biosynthesis gene BnNCED3 and the ABA sensor gene BnPYL4 in the shoot. In two contrasting genotypes, the auxin concentration decreased more drastically in the B-inefficient genotype 'W10,' and together the expression of BnNIT1 and BnPIN1 also decreased more significantly in 'W10' under long-term B deficiency. While the JAs concentration was considerably higher in this genotype, and the ABA concentration was induced in 'W10' compared with the B-efficient genotype 'QY10.' Digital gene expression (DGE) profiling confirmed the differential expression of the phytohormone-related genes, indicating more other phyohormone differences involving in gene regulation between 'QY10' and 'W10' under low-B stress. Additionally, the activity of DR5:GFP was reduced in the root under low-B in Arabidopsis, and the application of exogenous IAA could partly restore the B-defective phenotype in 'W10.' Overall, our data suggested that low-B disturbed phytohormone homeostasis in B. napus, which originated from the change of transcriptional regulation of phytohormones-related genes, and the differences between genotypes may partly account for their difference in tolerance (B-efficiency) to low-B.
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60
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Li C, Shen H, Wang T, Wang X. ABA Regulates Subcellular Redistribution of OsABI-LIKE2, a Negative Regulator in ABA Signaling, to Control Root Architecture and Drought Resistance in Oryza sativa. PLANT & CELL PHYSIOLOGY 2015; 56:2396-408. [PMID: 26491145 DOI: 10.1093/pcp/pcv154] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2015] [Accepted: 10/13/2015] [Indexed: 05/22/2023]
Abstract
The phytohormone ABA is a key stress signal in plants. Although the identification of ABA receptors led to significant progress in understanding the Arabidopsis ABA signaling pathway, there are still many unsolved mysteries regarding ABA signaling in monocots, such as rice. Here, we report that a rice ortholog of AtABI1 and AtABI2, named OsABI-LIKE2 (OsABIL2), plays a negative role in rice ABA signaling. Overexpression of OsABIL2 not only led to ABA insensitivity, but also significantly altered plant developmental phenotypes, including stomatal density and root architecture, which probably caused the hypersensitivity to drought stress. OsABIL2 interacts with OsPYL1, SAPK8 and SAPK10 both in vitro and in vivo, and the phosphatase activity of OsABIL2 was repressed by ABA-bound OsPYL1. However, unlike many other solely nuclear-localized clade A type 2C protein phosphatases (PP2Cs), OsABIL2 is localized in both the nucleus and cytosol. Furthermore, OsABIL2 interacts with and co-localized with OsPYL1 mainly in the cytosol, and ABA treatment regulates the nucleus-cytosol distribution of OsABIL2, suggesting a different mechanism for the activation of ABA signaling. Taken together, this study provides significant insights into rice ABA signaling and indicates the important role of OsABIL2 in regulating root development.
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Affiliation(s)
- Chengxiang Li
- National Key Laboratory of Genetic Engineering, School of Life Sciences, Fudan University, Shanghai 200433, China
| | - Hongyun Shen
- National Key Laboratory of Genetic Engineering, School of Life Sciences, Fudan University, Shanghai 200433, China
| | - Tao Wang
- National Key Laboratory of Genetic Engineering, School of Life Sciences, Fudan University, Shanghai 200433, China National Key Laboratory of Crop Genetic Improvement, College of Life Science and Technology, Huazhong Agricultural University, Wuhan 430070, Hubei, China
| | - Xuelu Wang
- National Key Laboratory of Crop Genetic Improvement, College of Life Science and Technology, Huazhong Agricultural University, Wuhan 430070, Hubei, China
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Jeong HJ, Jung KH. Rice tissue-specific promoters and condition-dependent promoters for effective translational application. JOURNAL OF INTEGRATIVE PLANT BIOLOGY 2015; 57:913-24. [PMID: 25882130 DOI: 10.1111/jipb.12362] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2015] [Accepted: 04/15/2015] [Indexed: 05/10/2023]
Abstract
Rice (Oryza sativa) is one of the most important staple food crops for more than half of the world's population. The demand is increasing for food security because of population growth and environmental challenges triggered by climate changes. This scenario has led to more interest in developing crops with greater productivity and sustainability. The process of genetic transformation, a major tool for crop improvement, utilizes promoters as one of its key elements. Those promoters are generally divided into three types: constitutive, spatiotemporal, and condition-dependent. Transcriptional control of a constitutive promoter often leads to reduced plant growth, due to a negative effect of accumulated molecules during cellular functions or energy consumption. To maximize the effect of a transgene on transgenic plants, it is better to use condition-dependent or tissue-specific promoters. However, until now, those types have not been as widely applied in crop biotechnology. In this review, we introduce and discuss four groups of tissue-specific promoters (50 promoters in total) and six groups of condition-dependent promoters (27 promoters). These promoters can be utilized to fine-tune desirable agronomic traits and develop crops with tolerance to various stresses, enhanced nutritional value, and advanced productivity.
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Affiliation(s)
- Hee-Jeong Jeong
- Department of Plant Molecular Systems Biotechnology and Crop Biotech Institute, Kyung Hee University, Yongin 446-701, Korea
| | - Ki-Hong Jung
- Department of Plant Molecular Systems Biotechnology and Crop Biotech Institute, Kyung Hee University, Yongin 446-701, Korea
- Graduate School of Biotechnology, Kyung Hee University, Yongin 446-701, Korea
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Spence C, Bais H. Role of plant growth regulators as chemical signals in plant-microbe interactions: a double edged sword. CURRENT OPINION IN PLANT BIOLOGY 2015; 27:52-8. [PMID: 26125499 DOI: 10.1016/j.pbi.2015.05.028] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2015] [Revised: 05/21/2015] [Accepted: 05/22/2015] [Indexed: 05/20/2023]
Abstract
Growth regulators act not only as chemicals that modulate plant growth but they also act as signal molecules under various biotic and abiotic stresses. Of all growth regulators, abscisic acid (ABA) is long known for its role in modulating plants response against both biotic and abiotic stress. Although the genetic information for ABA biosynthesis in plants is well documented, the knowledge about ABA biosynthesis in other organisms is still in its infancy. It is known that various microbes including bacteria produce and secrete ABA, but the overall functional significance of why ABA is synthesized by microbes is not known. Here we discuss the functional involvement of ABA biosynthesis by a pathogenic fungus. Furthermore, we propose that ABA biosynthesis in plant pathogenic fungi could be targeted for novel fungicidal discovery.
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Affiliation(s)
- Carla Spence
- Delaware Biotechnology Institute, Newark, DE 19711, United States; Department of Plant and Soil Sciences, University of Delaware, Newark, DE 19716, United States
| | - Harsh Bais
- Delaware Biotechnology Institute, Newark, DE 19711, United States; Department of Plant and Soil Sciences, University of Delaware, Newark, DE 19716, United States.
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Babitha KC, Vemanna RS, Nataraja KN, Udayakumar M. Overexpression of EcbHLH57 Transcription Factor from Eleusine coracana L. in Tobacco Confers Tolerance to Salt, Oxidative and Drought Stress. PLoS One 2015; 10:e0137098. [PMID: 26366726 PMCID: PMC4569372 DOI: 10.1371/journal.pone.0137098] [Citation(s) in RCA: 67] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2014] [Accepted: 08/12/2015] [Indexed: 02/01/2023] Open
Abstract
Basic helix-loop-helix (bHLH) transcription factors constitute one of the largest families in plants and are known to be involved in various developmental processes and stress tolerance. We report the characterization of a stress responsive bHLH transcription factor from stress adapted species finger millet which is homologous to OsbHLH57 and designated as EcbHLH57. The full length sequence of EcbHLH57 consisted of 256 amino acids with a conserved bHLH domain followed by leucine repeats. In finger millet, EcbHLH57 transcripts were induced by ABA, NaCl, PEG, methyl viologen (MV) treatments and drought stress. Overexpression of EcbHLH57 in tobacco significantly increased the tolerance to salinity and drought stress with improved root growth. Transgenic plants showed higher photosynthetic rate and stomatal conductance under drought stress that resulted in higher biomass. Under long-term salinity stress, the transgenic plants accumulated higher seed weight/pod and pod number. The transgenic plants were also tolerant to oxidative stress and showed less accumulation of H202 and MDA levels. The overexpression of EcbHLH57 enhanced the expression of stress responsive genes such as LEA14, rd29A, rd29B, SOD, APX, ADH1, HSP70 and also PP2C and hence improved tolerance to diverse stresses.
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Affiliation(s)
- K. C. Babitha
- Department of Crop Physiology, University of Agricultural Sciences, Bangalore, Karnataka, India
| | - Ramu S. Vemanna
- Department of Crop Physiology, University of Agricultural Sciences, Bangalore, Karnataka, India
| | - Karaba N. Nataraja
- Department of Crop Physiology, University of Agricultural Sciences, Bangalore, Karnataka, India
| | - M. Udayakumar
- Department of Crop Physiology, University of Agricultural Sciences, Bangalore, Karnataka, India
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Hossain MA, Bhattacharjee S, Armin SM, Qian P, Xin W, Li HY, Burritt DJ, Fujita M, Tran LSP. Hydrogen peroxide priming modulates abiotic oxidative stress tolerance: insights from ROS detoxification and scavenging. FRONTIERS IN PLANT SCIENCE 2015; 6:420. [PMID: 26136756 PMCID: PMC4468828 DOI: 10.3389/fpls.2015.00420] [Citation(s) in RCA: 327] [Impact Index Per Article: 36.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2015] [Accepted: 05/25/2015] [Indexed: 05/08/2023]
Abstract
Plants are constantly challenged by various abiotic stresses that negatively affect growth and productivity worldwide. During the course of their evolution, plants have developed sophisticated mechanisms to recognize external signals allowing them to respond appropriately to environmental conditions, although the degree of adjustability or tolerance to specific stresses differs from species to species. Overproduction of reactive oxygen species (ROS; hydrogen peroxide, H2O2; superoxide, [Formula: see text]; hydroxyl radical, OH(⋅) and singlet oxygen, (1)O2) is enhanced under abiotic and/or biotic stresses, which can cause oxidative damage to plant macromolecules and cell structures, leading to inhibition of plant growth and development, or to death. Among the various ROS, freely diffusible and relatively long-lived H2O2 acts as a central player in stress signal transduction pathways. These pathways can then activate multiple acclamatory responses that reinforce resistance to various abiotic and biotic stressors. To utilize H2O2 as a signaling molecule, non-toxic levels must be maintained in a delicate balancing act between H2O2 production and scavenging. Several recent studies have demonstrated that the H2O2-priming can enhance abiotic stress tolerance by modulating ROS detoxification and by regulating multiple stress-responsive pathways and gene expression. Despite the importance of the H2O2-priming, little is known about how this process improves the tolerance of plants to stress. Understanding the mechanisms of H2O2-priming-induced abiotic stress tolerance will be valuable for identifying biotechnological strategies to improve abiotic stress tolerance in crop plants. This review is an overview of our current knowledge of the possible mechanisms associated with H2O2-induced abiotic oxidative stress tolerance in plants, with special reference to antioxidant metabolism.
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Affiliation(s)
- Mohammad A. Hossain
- Department of Genetics and Plant Breeding, Bangladesh Agricultural UniversityMymensingh, Bangladesh
| | | | - Saed-Moucheshi Armin
- Department of Crop Production and Plant Breeding, College of Agriculture, Shiraz UniversityShiraz, Iran
| | - Pingping Qian
- Department of Biological Science, Graduate School of Science, Osaka UniversityToyonaka, Japan
| | - Wang Xin
- School of Pharmacy, Lanzhou UniversityLanzhou, China
| | - Hong-Yu Li
- Gansu Key Laboratory of Biomonitoring and Bioremediation for Environmental Pollution, School of Life Sciences, Lanzhou UniversityLanzhou, China
| | | | - Masayuki Fujita
- Laboratory of Plant Stress Responses, Faculty of Agriculture, Kagawa UniversityTakamatsu, Japan
| | - Lam-Son P. Tran
- Signaling Pathway Research Unit, RIKEN Center for Sustainable Resource ScienceYokohama, Japan
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Jisha V, Dampanaboina L, Vadassery J, Mithöfer A, Kappara S, Ramanan R. Overexpression of an AP2/ERF Type Transcription Factor OsEREBP1 Confers Biotic and Abiotic Stress Tolerance in Rice. PLoS One 2015; 10:e0127831. [PMID: 26035591 PMCID: PMC4452794 DOI: 10.1371/journal.pone.0127831] [Citation(s) in RCA: 108] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2015] [Accepted: 04/21/2015] [Indexed: 11/18/2022] Open
Abstract
AP2/ERF–type transcription factors regulate important functions of plant growth and development as well as responses to environmental stimuli. A rice AP2/ERF transcription factor, OsEREBP1 is a downstream component of a signal transduction pathway in a specific interaction between rice (Oryza sativa) and its bacterial pathogen, Xoo (Xanthomonas oryzae pv. oryzae). Constitutive expression of OsEREBP1 in rice driven by maize ubiquitin promoter did not affect normal plant growth. Microarray analysis revealed that over expression of OsEREBP1 caused increased expression of lipid metabolism related genes such as lipase and chloroplastic lipoxygenase as well as several genes related to jasmonate and abscisic acid biosynthesis. PR genes, transcription regulators and Aldhs (alcohol dehydrogenases) implicated in abiotic stress and submergence tolerance were also upregulated in transgenic plants. Transgenic plants showed increase in endogenous levels of α-linolenate, several jasmonate derivatives and abscisic acid but not salicylic acid. Soluble modified GFP (SmGFP)-tagged OsEREBP1 was localized to plastid nucleoids. Comparative analysis of non-transgenic and OsEREBP1 overexpressing genotypes revealed that OsEREBP1 attenuates disease caused by Xoo and confers drought and submergence tolerance in transgenic rice. Our results suggest that constitutive expression of OsEREBP1 activates the jasmonate and abscisic acid signalling pathways thereby priming the rice plants for enhanced survival under abiotic or biotic stress conditions. OsEREBP1 is thus, a good candidate gene for engineering plants for multiple stress tolerance.
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Affiliation(s)
- V. Jisha
- Centre for Cellular and Molecular Biology, Hyderabad, India
| | | | | | - Axel Mithöfer
- Max Planck Institute for Chemical Ecology, Department Bioorganic Chemistry, Jena, Germany
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Nguyen QN, Lee YS, Cho LH, Jeong HJ, An G, Jung KH. Genome-wide identification and analysis of Catharanthus roseus RLK1-like kinases in rice. PLANTA 2015; 241:603-13. [PMID: 25399351 DOI: 10.1007/s00425-014-2203-2] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2014] [Accepted: 11/05/2014] [Indexed: 05/22/2023]
Abstract
A genome-wide survey of Catharanthus roseus receptor-like kinase1-like kinases (CrRLK1Ls) in rice revealed that the pattern of expression by some CrRLK1Ls is controlled by drought or circadian rhythms. This is probably accomplished through the functioning of Gigantea ( OsGI ). Such findings provide a novel angle for using CrRLK1Ls to study the drought-stress response and circadian regulation. The 17 CrRLK1L members of a novel RLK family have been identified in Arabidopsis. Each carries a putative extracellular carbohydrate-binding malectin-like domain. However, their roles in rice, a widely consumed staple food, are not well understood. To investigate the functions of CrRLK1Ls in rice, we utilized phylogenomics data obtained through anatomical and diurnal meta-expression analyses. This information was integrated with a large set of public microarray data within the context of the rice CrRLK1L family phylogenic tree. Chromosomal locations indicated that 3 of 16 genes were tandem-duplicated, suggesting possible functional redundancy within this family. However, integrated diurnal expression showed functional divergence between two of three genes, i.e., peak expression was detected during the day for OsCrRLK1L2, but during the night for OsCrRLK1L3. We found it interesting that OsCrRLK1L2 expression was repressed in osgigantea (osgi) mutants, which suggests that it could function downstream of OsGI. Network analysis associated with OsCrRLK1L2 and OsGI suggested a novel circadian regulation mechanism mediated by OsGI. In addition, two of five OsCrRLK1Ls preferentially expressed in the roots were stimulated by drought, suggesting a potential role for this family in water-use efficiency. This preliminary identification of CrRLK1Ls and study of their expression in rice will facilitate further functional classifications and applications in plant production.
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Affiliation(s)
- Quynh-Nga Nguyen
- Department of Plant Molecular Systems Biotechnology and Crop Biotech Institute, Kyung Hee University, Yongin, 446-701, Korea
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67
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Zheng J, Zhang Y, Wang C. Molecular functions of genes related to grain shape in rice. BREEDING SCIENCE 2015; 65:120-6. [PMID: 26069441 PMCID: PMC4430511 DOI: 10.1270/jsbbs.65.120] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2014] [Accepted: 11/28/2014] [Indexed: 05/23/2023]
Abstract
Because grain shape is an important component of rice grain yield, the discovery of genes related to rice grain shape has attracted much attention of rice breeding programs. In recent years, some of these genes have been cloned and studied. They have been found not only regulate grain shape by changing the shape of the spikelet hull, but also regulate endosperm development through control of cell division using different molecular mechanisms. In this paper, we review the recent research on genes related to rice grain shape and their possible regulatory mechanisms.
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Affiliation(s)
- Jia Zheng
- Institute of Food Crops, Jiangsu Academy of Agricultural Sciences, Jiangsu High Quality Rice Research and Development Center, Nanjing Branch of China National Center for Rice Improvement,
Nanjing 210014,
China
| | - Yadong Zhang
- Institute of Food Crops, Jiangsu Academy of Agricultural Sciences, Jiangsu High Quality Rice Research and Development Center, Nanjing Branch of China National Center for Rice Improvement,
Nanjing 210014,
China
| | - Cailin Wang
- Institute of Food Crops, Jiangsu Academy of Agricultural Sciences, Jiangsu High Quality Rice Research and Development Center, Nanjing Branch of China National Center for Rice Improvement,
Nanjing 210014,
China
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68
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Liu R, Liu Y, Ye N, Zhu G, Chen M, Jia L, Xia Y, Shi L, Jia W, Zhang J. AtDsPTP1 acts as a negative regulator in osmotic stress signalling during Arabidopsis seed germination and seedling establishment. JOURNAL OF EXPERIMENTAL BOTANY 2015; 66:1339-53. [PMID: 25540435 PMCID: PMC4339596 DOI: 10.1093/jxb/eru484] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Dual-specificity protein phosphatases (DsPTPs) target both tyrosine and serine/threonine residues and play roles in plant growth and development. We have characterized an Arabidopsis mutant, dsptp1, which shows a higher seed germination rate and better root elongation under osmotic stress than the wild type. By contrast, its overexpression line, DsPTP1-OE, shows inhibited seed germination and root elongation; and its complemented line, DsPTP1-Com, resembles the wild type and rescues DsPTP1-OE under osmotic stress. Expression of AtDsPTP1 is enhanced by osmotic stress in seed coats, bases of rosette leaves, and roots. Compared with the wild type, the dsptp1 mutant shows increased proline accumulation, reduced malondialdehyde (MDA) content and ion leakage, and enhanced antioxidant enzyme activity in response to osmotic stress. AtDsPTP1 regulates the transcript levels of various dehydration-responsive genes under osmotic stress. Abscisic acid (ABA) accumulation in dsptp1 under osmotic stress is reduced with reduced expression of the ABA-biosynthesis gene NCED3 and increased expression of the ABA-catabolism gene CYP707A4. AtDsPTP1 also regulates the expression of key components in the ABA-signalling pathway. In conclusion, AtDsPTP1 regulates ABA accumulation, and acts as a negative regulator in osmotic stress signalling during Arabidospsis seed germination and seedling establishment.
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Affiliation(s)
- Rui Liu
- College of Life Science, Shandong University, Jinan, Shandong, China Department of Biology, Hong Kong Baptist University, Hong Kong, China
| | - Yinggao Liu
- State Key Laboratory of Crop Biology, College of Life Science, Shandong Agricultural University, Taian, Shandong, China
| | - Nenghui Ye
- Shenzhen Research Institute, The Chinese University of Hong Kong, Shenzhen, China
| | - Guohui Zhu
- College of Life Sciences, South China Agricultural University, Guangdong, China
| | - Moxian Chen
- School of Life Science and State Key Laboratory of Agrobiotechnology, The Chinese University of Hong Kong, Hong Kong, China
| | - Liguo Jia
- Department of Biology, Hong Kong Baptist University, Hong Kong, China
| | - Yiji Xia
- Department of Biology, Hong Kong Baptist University, Hong Kong, China
| | - Lu Shi
- Department of Biology, Hong Kong Baptist University, Hong Kong, China
| | - Wensuo Jia
- College of Agronomy and Biotechnology, China Agricultural University, Beijing, China
| | - Jianhua Zhang
- Shenzhen Research Institute, The Chinese University of Hong Kong, Shenzhen, China School of Life Science and State Key Laboratory of Agrobiotechnology, The Chinese University of Hong Kong, Hong Kong, China
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69
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Spence CA, Lakshmanan V, Donofrio N, Bais HP. Crucial Roles of Abscisic Acid Biogenesis in Virulence of Rice Blast Fungus Magnaporthe oryzae. FRONTIERS IN PLANT SCIENCE 2015; 6:1082. [PMID: 26648962 PMCID: PMC4664623 DOI: 10.3389/fpls.2015.01082] [Citation(s) in RCA: 56] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2015] [Accepted: 11/19/2015] [Indexed: 05/18/2023]
Abstract
Rice suffers dramatic yield losses due to blast pathogen Magnaporthe oryzae. Pseudomonas chlororaphis EA105, a bacterium that was isolated from the rice rhizosphere, inhibits M. oryzae. It was shown previously that pre-treatment of rice with EA105 reduced the size of blast lesions through jasmonic acid (JA)- and ethylene (ETH)-mediated ISR. Abscisic acid (ABA) acts antagonistically toward salicylic acid (SA), JA, and ETH signaling, to impede plant defense responses. EA105 may be reducing the virulence of M. oryzae by preventing the pathogen from up-regulating the key ABA biosynthetic gene NCED3 in rice roots, as well as a β-glucosidase likely involved in activating conjugated inactive forms of ABA. However, changes in total ABA concentrations were not apparent, provoking the question of whether ABA concentration is an indicator of ABA signaling and response. In the rice-M. oryzae interaction, ABA plays a dual role in disease severity by increasing plant susceptibility and accelerating pathogenesis in the fungus itself. ABA is biosynthesized by M. oryzae. Further, exogenous ABA increased spore germination and appressoria formation, distinct from other plant growth regulators. EA105, which inhibits appressoria formation, counteracted the virulence-promoting effects of ABA on M. oryzae. The role of endogenous fungal ABA in blast disease was confirmed through the inability of a knockout mutant impaired in ABA biosynthesis to form lesions on rice. Therefore, it appears that EA105 is invoking multiple strategies in its protection of rice from blast including direct mechanisms as well as those mediated through plant signaling. ABA is a molecule that is likely implicated in both tactics.
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Affiliation(s)
- Carla A. Spence
- Department of Biological Sciences, University of DelawareNewark, DE, USA
- Delaware Biotechnology InstituteNewark, DE, USA
- Department of Plant and Soil Sciences, University of DelawareNewark, DE, USA
| | - Venkatachalam Lakshmanan
- Delaware Biotechnology InstituteNewark, DE, USA
- Department of Plant and Soil Sciences, University of DelawareNewark, DE, USA
| | - Nicole Donofrio
- Department of Plant and Soil Sciences, University of DelawareNewark, DE, USA
| | - Harsh P. Bais
- Delaware Biotechnology InstituteNewark, DE, USA
- Department of Plant and Soil Sciences, University of DelawareNewark, DE, USA
- *Correspondence: Harsh P. Bais,
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70
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Yukiyoshi K, Karahara I. Role of ethylene signalling in the formation of constitutive aerenchyma in primary roots of rice. AOB PLANTS 2014; 6:plu043. [PMID: 25063833 PMCID: PMC4141327 DOI: 10.1093/aobpla/plu043] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2014] [Accepted: 07/01/2014] [Indexed: 05/20/2023]
Abstract
Although the extent of aerenchyma (interconnected gas-filled space) formed in the cortex of the roots of some species can be promoted by submergence and ethylene, such roots also form a somewhat less extensive aerenchyma under well-aerated conditions. It has been unclear whether or not ethylene is also involved in promoting this constitutive aerenchyma. To confirm the potential of ethylene to stimulate aerenchyma development and test the possibility that gas regulates constitutive aerenchyma, a novel sandwich method was employed in rice roots. This involved germinating japonica rice (Oryza sativa) caryopses sandwiched between two agar slabs with or without 1-aminocyclopropane-1-carboxylic acid (ACC) at 1 µM. The roots were then grown for 4 days in the dark in the presence or absence of gaseous 1-methylcyclopropene (1-MCP), an inhibitor of ethylene action. Examination of aerenchyma development by light microscopy demonstrated a more extensive aerenchyma in cross-section on the ACC-treated side that also commenced closer to the root tip. In the presence of 1-MCP at 0.1 or 1 ppm, aerenchyma formation was inhibited in the presence or absence of ACC. 1-Methylcyclopropene also overcame ACC-inhibited root elongation. The results indicate that ethylene signalling is involved in aerenchyma development in primary roots of rice and that this may include the regulation of constitutive aerenchyma. In addition, root elongation was slowed in control roots in the presence of 1 ppm 1-MCP, supporting previous studies demonstrating that endogenous levels of ethylene stimulate root elongation.
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Affiliation(s)
- Kenta Yukiyoshi
- Department of Biology, Graduate School of Science and Engineering, University of Toyama, Toyama 930-8555, Japan
| | - Ichirou Karahara
- Department of Biology, Graduate School of Science and Engineering, University of Toyama, Toyama 930-8555, Japan
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71
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Cloning and expression of two 9-cis-epoxycarotenoid dioxygenase genes during fruit development and under stress conditions from Malus. Mol Biol Rep 2014; 41:6795-802. [DOI: 10.1007/s11033-014-3565-z] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2013] [Accepted: 06/25/2014] [Indexed: 11/27/2022]
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Han M, Kim CY, Lee J, Lee SK, Jeon JS. OsWRKY42 represses OsMT1d and induces reactive oxygen species and leaf senescence in rice. Mol Cells 2014; 37:532-9. [PMID: 25081037 PMCID: PMC4132305 DOI: 10.14348/molcells.2014.0128] [Citation(s) in RCA: 63] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2014] [Revised: 06/17/2014] [Accepted: 06/18/2014] [Indexed: 11/27/2022] Open
Abstract
We isolated a rice (Oryza sativa L.) WRKY gene which is highly upregulated in senescent leaves, denoted OsWRKY42. Analysis of OsWRKY42-GFP expression and its effects on transcriptional activation in maize protoplasts suggested that the OsWRKY42 protein functions as a nuclear transcriptional repressor. OsWRKY42-overexpressing (OsWR KY42OX) transgenic rice plants exhibited an early leaf senescence phenotype with accumulation of the reactive oxygen species (ROS) hydrogen peroxide and a reduced chlorophyll content. Expression analysis of ROS producing and scavenging genes revealed that the metallothionein genes clustered on chromosome 12, especially OsMT1d, were strongly repressed in OsWRKY42OX plants. An OsMT1d promoter:LUC construct was found to be repressed by OsWRKY42 overexpression in rice protoplasts. Finally, chromatin immunoprecipitation analysis demonstrated that OsWRKY42 binds to the W-box of the OsMT1d promoter. Our results thus suggest that OsWRKY42 represses OsMT1d-mediated ROS scavenging and thereby promotes leaf senescence in rice.
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Affiliation(s)
- Muho Han
- Graduate School of Biotechnology and Crop Biotech Institute, Kyung Hee University, Yongin 446-701, Korea
| | - Chi-Yeol Kim
- Graduate School of Biotechnology and Crop Biotech Institute, Kyung Hee University, Yongin 446-701, Korea
| | - Junok Lee
- Graduate School of Biotechnology and Crop Biotech Institute, Kyung Hee University, Yongin 446-701, Korea
| | - Sang-Kyu Lee
- Graduate School of Biotechnology and Crop Biotech Institute, Kyung Hee University, Yongin 446-701, Korea
| | - Jong-Seong Jeon
- Graduate School of Biotechnology and Crop Biotech Institute, Kyung Hee University, Yongin 446-701, Korea
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Singh N, Paul P, Virdi AS, Kaur P, Mahajan G. Influence of Early and Delayed Transplantation of Paddy on Physicochemical, Pasting, Cooking, Textural, and Protein Characteristics of Milled Rice. Cereal Chem 2014. [DOI: 10.1094/cchem-09-13-0193-r] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- Narpinder Singh
- Department of Food Science and Technology, Guru Nanak Dev University, Amritsar 143005, India
- Corresponding author. Fax: +91-183-2258820. E-mail:
| | - Priyanka Paul
- Department of Food Science and Technology, Guru Nanak Dev University, Amritsar 143005, India
| | - Amardeep Singh Virdi
- Department of Food Science and Technology, Guru Nanak Dev University, Amritsar 143005, India
| | - Parmeet Kaur
- Department of Food Science and Technology, Guru Nanak Dev University, Amritsar 143005, India
| | - Gulshan Mahajan
- Department of Plant Breeding and Genetics, Punjab Agricultural University, Ludhiana 141004, India
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Shanker AK, Maheswari M, Yadav SK, Desai S, Bhanu D, Attal NB, Venkateswarlu B. Drought stress responses in crops. Funct Integr Genomics 2014; 14:11-22. [PMID: 24408129 DOI: 10.1007/s10142-013-0356-x] [Citation(s) in RCA: 105] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2013] [Revised: 12/04/2013] [Accepted: 12/18/2013] [Indexed: 01/09/2023]
Abstract
Among the effects of impending climate change, drought will have a profound impact on crop productivity in the future. Response to drought stress has been studied widely, and the model plant Arabidopsis has guided the studies on crop plants with genome sequence information viz., rice, wheat, maize and sorghum. Since the value of functions of genes, dynamics of pathways and interaction of networks for drought tolerance in plants can only be judged by evidence from field performance, this mini-review provides a research update focussing on the current developments on the response to drought in crop plants. Studies in Arabidopsis provide the basis for interpreting the available information in a systems biology perspective. In particular, the elucidation of the mechanism of drought stress response in crops is considered from evidence-based outputs emerging from recent omic studies in crops.
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Affiliation(s)
- Arun K Shanker
- Division of Crop Sciences, Central Research Institute for Dryland Agriculture (CRIDA), Santoshnagar, Saidabad P.O, Hyderabad, 500-059, India,
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Kumar K, Kumar M, Kim SR, Ryu H, Cho YG. Insights into genomics of salt stress response in rice. RICE (NEW YORK, N.Y.) 2013; 6:27. [PMID: 24280112 PMCID: PMC4883734 DOI: 10.1186/1939-8433-6-27] [Citation(s) in RCA: 104] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2013] [Accepted: 08/29/2013] [Indexed: 05/18/2023]
Abstract
Plants, as sessile organisms experience various abiotic stresses, which pose serious threat to crop production. Plants adapt to environmental stress by modulating their growth and development along with the various physiological and biochemical changes. This phenotypic plasticity is driven by the activation of specific genes encoding signal transduction, transcriptional regulation, ion transporters and metabolic pathways. Rice is an important staple food crop of nearly half of the world population and is well known to be a salt sensitive crop. The completion and enhanced annotations of rice genome sequence has provided the opportunity to study functional genomics of rice. Functional genomics aids in understanding the molecular and physiological basis to improve the salinity tolerance for sustainable rice production. Salt tolerant transgenic rice plants have been produced by incorporating various genes into rice. In this review we present the findings and investigations in the field of rice functional genomics that includes supporting genes and networks (ABA dependent and independent), osmoprotectants (proline, glycine betaine, trehalose, myo-inositol, and fructans), signaling molecules (Ca2+, abscisic acid, jasmonic acid, brassinosteroids) and transporters, regulating salt stress response in rice.
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Affiliation(s)
- Kundan Kumar
- />Department of Biological Sciences, Birla Institute of Technology & Science, K. K. Birla Goa Campus, Goa 403726 India
| | - Manu Kumar
- />Department of Life Science, Sogang University, Seoul, 121-742 Korea
| | - Seong-Ryong Kim
- />Department of Life Science, Sogang University, Seoul, 121-742 Korea
| | - Hojin Ryu
- />Department of Life Science, Pohang University of Science & Technology, Pohang, Korea
| | - Yong-Gu Cho
- />Department of Crop Science, Chungbuk National University, Cheongju, 361-763 Korea
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Xu J, Xiong W, Cao B, Yan T, Luo T, Fan T, Luo M. Molecular characterization and functional analysis of "fruit-weight 2.2-like" gene family in rice. PLANTA 2013; 238:643-655. [PMID: 23793979 DOI: 10.1007/s00425-013-1916-y] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2013] [Accepted: 06/06/2013] [Indexed: 06/02/2023]
Abstract
Tomato fruit-weight 2.2 (FW2.2) was reported to control up to 30 % fruit weight. Recent studies demonstrated that FW2.2-like (FWL) genes also play important roles in plant growth and development. For instance, a maize homolog of FW2.2, named cell number regulator 1 (CNR1), negatively regulates plant and organ size. However, FWL genes in rice have not been characterized yet. In this study, eight FWL genes were identified in rice genome and designated as OsFWL1-8. The chromosome location, gene structure, protein motif, and phylogenetic relationship of OsFWL genes were analyzed. RT-PCR result and microarray data revealed that OsFWL genes exhibited diverse expression patterns and the detailed expression patterns of OsFWL5, 6, and 7 negatively correlated with leaf growth activity. Rice protoplast transient transformation experiment showed that most OsFWL proteins locate at cell membrane but OsFWL8 is present in the nucleus. In addition, the functions of OsFWL genes were investigated by analyzing two T-DNA insertion lines for OsFWL3 and 5. Compared with wild type, the grain weight of osfwl3 mutant and the plant height of osfwl5 mutant were increased by 5.3 and 12.5 %, respectively. We also found that the increase in grain length of osfwl3 mutant was due chiefly to incremental cell number, not cell size and the expression of OsFWL3 negatively correlated with glume growth activity. These results provide a comprehensive foundation for further study of OsFWL functions in rice.
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Affiliation(s)
- Jun Xu
- National Key Laboratory of Crop Genetic Improvement, Huazhong Agricultural University, Wuhan, 430070, China
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Genome-wide identification of the class III aminotransferase gene family in rice and expression analysis under abiotic stress. Genes Genomics 2013. [DOI: 10.1007/s13258-013-0108-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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Wang Z, Cheng J, Chen Z, Huang J, Bao Y, Wang J, Zhang H. Identification of QTLs with main, epistatic and QTL × environment interaction effects for salt tolerance in rice seedlings under different salinity conditions. TAG. THEORETICAL AND APPLIED GENETICS. THEORETISCHE UND ANGEWANDTE GENETIK 2012; 255:6. [PMID: 22678666 DOI: 10.1007/s00425-021-03802-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2021] [Accepted: 11/22/2021] [Indexed: 05/24/2023]
Abstract
Salt tolerance of rice (Oryza sativa L.) at the seedling stage is one of the major determinants of its stable establishment in saline soil. One population of recombinant inbred lines (RILs, F (2:9)) derived from a cross between the salt-tolerant variety Jiucaiqing and the salt-sensitive variety IR26 was used to determine the genetic mechanism of four salt tolerance indices, seedling height (SH), dry shoot weight (DSW), dry root weight (DRW) and Na/K ratios (Na/K) in roots after 10 days in three salt concentrations (0.0, 0.5 and 0.7 % NaCl). The main effect QTLs (M-QTLs) and epistatic QTLs (E-QTLs) were detected by QTL IciMapping program using single environment phenotypic values. Eleven M-QTLs and 11 E-QTLs were identified for the salt tolerance indices. There were six M-QTLs and two E-QTLs identified for SH, three M-QTLs and five E-QTLs identified for DSW, two M-QTLs and one E-QTL identified for DRW, and three E-QTLs identified for Na/K. The phenotypic variation explained by each M-QTL and E-QTL ranged from 7.8 to 23.9 % and 13.3 to 73.7 %, respectively. The QTL-by-environment interactions were detected by QTLNetwork program in the joint analyses of multi-environment phenotypic values. Six M-QTLs and five E-QTLs were identified. The phenotypic variation explained by each QTL and QTL × environment interaction ranged from 0.95 to 6.90 % and 0.02 to 0.50 %, respectively. By comparing chromosomal positions of these M-QTLs with those previously identified, five M-QTLs qSH1.3, qSH12.1, qSH12.2, qDSW12.1 and qDRW11 might represent novel salt tolerance genes. Five selected RILs with high salt tolerance had six to eight positive alleles of the M-QTLs, indicating that pyramiding by marker-assisted selection (MAS) of M-QTLs can be applied in rice salt tolerance breeding programs.
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Affiliation(s)
- Zhoufei Wang
- The Laboratory of Seed Science and Technology, State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing 210095, People's Republic of China
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