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Chen J, Yang Y, Li C, Chen Q, Liu S, Qin B. Genome-Wide Identification of MADS-Box Genes in Taraxacum kok-saghyz and Taraxacum mongolicum: Evolutionary Mechanisms, Conserved Functions and New Functions Related to Natural Rubber Yield Formation. Int J Mol Sci 2023; 24:10997. [PMID: 37446175 DOI: 10.3390/ijms241310997] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2023] [Revised: 06/27/2023] [Accepted: 06/29/2023] [Indexed: 07/15/2023] Open
Abstract
MADS-box transcription regulators play important roles in plant growth and development. However, very few MADS-box genes have been isolated in the genus Taraxacum, which consists of more than 3000 species. To explore their functions in the promising natural rubber (NR)-producing plant Taraxacum kok-saghyz (TKS), MADS-box genes were identified in the genome of TKS and the related species Taraxacum mongolicum (TM; non-NR-producing) via genome-wide screening. In total, 66 TkMADSs and 59 TmMADSs were identified in the TKS and TM genomes, respectively. From diploid TKS to triploid TM, the total number of MADS-box genes did not increase, but expansion occurred in specific subfamilies. Between the two genomes, a total of 11 duplications, which promoted the expansion of MADS-box genes, were identified in the two species. TkMADS and TmMADS were highly conserved, and showed good collinearity. Furthermore, most TkMADS genes exhibiting tissue-specific expression patterns, especially genes associated with the ABCDE model, were preferentially expressed in the flowers, suggesting their conserved and dominant functions in flower development in TKS. Moreover, by comparing the transcriptomes of different TKS lines, we identified 25 TkMADSs related to biomass formation and 4 TkMADSs related to NR content, which represented new targets for improving the NR yield of TKS.
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Affiliation(s)
- Jiaqi Chen
- Key Laboratory of Biology and Genetic Resources of Rubber Tree, Ministry of Agriculture and Rural Affairs, Rubber Research Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, China
- Institute of Tropical Crops, Hainan University, Haikou 570228, China
| | - Yushuang Yang
- Key Laboratory of Biology and Genetic Resources of Rubber Tree, Ministry of Agriculture and Rural Affairs, Rubber Research Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, China
| | - Chuang Li
- Key Laboratory of Biology and Genetic Resources of Rubber Tree, Ministry of Agriculture and Rural Affairs, Rubber Research Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, China
- Institute of Tropical Crops, Hainan University, Haikou 570228, China
| | - Qiuhui Chen
- Key Laboratory of Biology and Genetic Resources of Rubber Tree, Ministry of Agriculture and Rural Affairs, Rubber Research Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, China
| | - Shizhong Liu
- Key Laboratory of Biology and Genetic Resources of Rubber Tree, Ministry of Agriculture and Rural Affairs, Rubber Research Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, China
| | - Bi Qin
- Key Laboratory of Biology and Genetic Resources of Rubber Tree, Ministry of Agriculture and Rural Affairs, Rubber Research Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, China
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Yang Z, Nie G, Feng G, Xu X, Li D, Wang X, Huang L, Zhang X. Genome-wide identification of MADS-box gene family in orchardgrass and the positive role of DgMADS114 and DgMADS115 under different abiotic stress. Int J Biol Macromol 2022; 223:129-142. [PMID: 36356860 DOI: 10.1016/j.ijbiomac.2022.11.027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2022] [Revised: 10/30/2022] [Accepted: 11/01/2022] [Indexed: 11/09/2022]
Abstract
Abiotic stress, a major factor limit growth and productivity of major crops. Orchardgrass is one of the most important cool-season forage grasses in the world, and it is highly tolerant to abiotic stress. The MADS-box transcription factor family is one of the largest families in plants, and it plays vital roles in multiple biological processes. However, MADS-box transcription factors in orchardgrass, especially those involved in abiotic stress, have not yet been elucidated. Here, 123 DgMADS-box members were identified in orchardgrass and a detailed overview has been presented. Syntenic analysis indicated that the expansion of the DgMADS-box genes in orchardgrass is mainly dependent on tandem duplication events. Some DgMADS-box genes were induced by multiple abiotic stresses, indicating that these genes may play critical regulatory roles in orchardgrass response to various abiotic stresses. Heterologous expression showed that DgMADS114 and DgMADS115 could enhance stress tolerance of transgenic Arabidopsis, as revealed by longer root length or higher survival rates under PEG, NaCl, ABA, and heat stress. The results of this study provide a scientific basis for clarifying the functional characterization of MADS-box genes in orchardgrass in response to environmental stress can be further used to improve forages and crops via breeding programs.
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Affiliation(s)
- Zhongfu Yang
- College of Grassland Science and Technology, Sichuan Agricultural University, Chengdu 611130, China
| | - Gang Nie
- College of Grassland Science and Technology, Sichuan Agricultural University, Chengdu 611130, China
| | - Guangyan Feng
- College of Grassland Science and Technology, Sichuan Agricultural University, Chengdu 611130, China
| | - Xiaoheng Xu
- College of Grassland Science and Technology, Sichuan Agricultural University, Chengdu 611130, China
| | - Dandan Li
- College of Grassland Science and Technology, Sichuan Agricultural University, Chengdu 611130, China
| | - Xia Wang
- College of Grassland Science and Technology, Sichuan Agricultural University, Chengdu 611130, China
| | - Linkai Huang
- College of Grassland Science and Technology, Sichuan Agricultural University, Chengdu 611130, China.
| | - Xinquan Zhang
- College of Grassland Science and Technology, Sichuan Agricultural University, Chengdu 611130, China.
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Nasrollahi V, Yuan ZC, Kohalmi SE, Hannoufa A. SPL12 Regulates AGL6 and AGL21 to Modulate Nodulation and Root Regeneration under Osmotic Stress and Nitrate Sufficiency Conditions in Medicago sativa. PLANTS (BASEL, SWITZERLAND) 2022; 11:plants11223071. [PMID: 36432802 PMCID: PMC9697194 DOI: 10.3390/plants11223071] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2022] [Revised: 10/26/2022] [Accepted: 11/10/2022] [Indexed: 06/12/2023]
Abstract
The highly conserved plant microRNA, miR156, affects root architecture, nodulation, symbiotic nitrogen fixation, and stress response. In Medicago sativa, transcripts of eleven SQUAMOSA-PROMOTER BINDING PROTEIN-LIKE, SPLs, including SPL12, are targeted for cleavage by miR156. Our previous research revealed the role of SPL12 and its target gene, AGL6, in nodulation in alfalfa. Here, we investigated the involvement of SPL12, AGL6 and AGL21 in nodulation under osmotic stress and different nitrate availability conditions. Characterization of phenotypic and molecular parameters revealed that the SPL12/AGL6 module plays a negative role in maintaining nodulation under osmotic stress. While there was a decrease in the nodule numbers in WT plants under osmotic stress, the SPL12-RNAi and AGL6-RNAi genotypes maintained nodulation under osmotic stress. Moreover, the results showed that SPL12 regulates nodulation under a high concentration of nitrate by silencing AGL21. AGL21 transcript levels were increased under nitrate treatment in WT plants, but SPL12 was not affected throughout the treatment period. Given that AGL21 was significantly upregulated in SPL12-RNAi plants, we conclude that SPL12 may be involved in regulating nitrate inhibition of nodulation in alfalfa by targeting AGL21. Taken together, our results suggest that SPL12, AGL6, and AGL21 form a genetic module that regulates nodulation in alfalfa under osmotic stress and in response to nitrate.
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Affiliation(s)
- Vida Nasrollahi
- Agriculture and Agri-Food Canada, 1391 Sandford Street, London, ON N5V 4T3, Canada
- Department of Biology, University of Western Ontario, 1151 Richmond Street, London, ON N6A 3K7, Canada
| | - Ze-Chun Yuan
- Agriculture and Agri-Food Canada, 1391 Sandford Street, London, ON N5V 4T3, Canada
| | - Susanne E. Kohalmi
- Department of Biology, University of Western Ontario, 1151 Richmond Street, London, ON N6A 3K7, Canada
| | - Abdelali Hannoufa
- Agriculture and Agri-Food Canada, 1391 Sandford Street, London, ON N5V 4T3, Canada
- Department of Biology, University of Western Ontario, 1151 Richmond Street, London, ON N6A 3K7, Canada
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Li H, Li Y, Zhang X, Cai K, Li Y, Wang Q, Qu G, Han R, Zhao X. Genome-wide identification and expression analysis of the MADS-box gene family during female and male flower development in Juglans mandshurica. FRONTIERS IN PLANT SCIENCE 2022; 13:1020706. [PMID: 36388573 PMCID: PMC9664150 DOI: 10.3389/fpls.2022.1020706] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/16/2022] [Accepted: 10/11/2022] [Indexed: 06/16/2023]
Abstract
The MADS-box gene family plays a crucial role in multiple developmental processes of plants, especially in floral organ specification and the regulation of fruit development and ripening. Juglans mandshurica is a precious fruit material whose quality and yield are determined by floral organ development. The molecular mechanism of J. mandshurica female and male flower development depending on MADS-box genes remains unclear. In our study, 67 JmMADS genes were identified and unevenly distributed on 15 of 16 J. mandshurica chromosomes. These genes were divided into two types [type I (Mα, Mγ, Mδ) and type II (MIKC)]. The gene structure and motif analyses showed that most genes belonging to the same type had similar gene structures and conserved motifs. The analysis of syntenic relationships showed that MADS-box genes in J. mandshurica, J. sigillata, and J. regia exhibited the highest homology and great collinearity. Analysis of cis-acting elements showed that JmMADS gene promoter regions contained light, stress and hormone response cis-acting elements. The gene expression patterns demonstrated that 30 and 26 JmMADS genes were specifically expressed in the female and male flowers, respectively. In addition, 12 selected genes common to J. mandshurica female and male flowers were significantly upregulated at the mature stage and were used to validate the reliability of the transcriptome data using quantitative real-time PCR. This comprehensive and systematic analysis of J. mandshurica MADS-box genes lays a foundation for future studies on MADS-box gene family functions.
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Affiliation(s)
- Hanxi Li
- State Key Laboratory of tree Genetics and Breeding, Northeast Forestry University, Harbin, China
- Jilin Provincial Key Laboratory of Tree and Grass Genetics and Breeding, College of Forestry and Grassland Science, Jilin Agricultural University, Changchun, China
| | - Yuxi Li
- State Key Laboratory of tree Genetics and Breeding, Northeast Forestry University, Harbin, China
| | - Xinxin Zhang
- State Key Laboratory of tree Genetics and Breeding, Northeast Forestry University, Harbin, China
| | - Kewei Cai
- State Key Laboratory of tree Genetics and Breeding, Northeast Forestry University, Harbin, China
| | - Yan Li
- State Key Laboratory of tree Genetics and Breeding, Northeast Forestry University, Harbin, China
- Jilin Provincial Key Laboratory of Tree and Grass Genetics and Breeding, College of Forestry and Grassland Science, Jilin Agricultural University, Changchun, China
| | - Qingcheng Wang
- State Key Laboratory of tree Genetics and Breeding, Northeast Forestry University, Harbin, China
| | - Guanzheng Qu
- State Key Laboratory of tree Genetics and Breeding, Northeast Forestry University, Harbin, China
| | - Rui Han
- State Key Laboratory of tree Genetics and Breeding, Northeast Forestry University, Harbin, China
- Jilin Provincial Key Laboratory of Tree and Grass Genetics and Breeding, College of Forestry and Grassland Science, Jilin Agricultural University, Changchun, China
| | - Xiyang Zhao
- State Key Laboratory of tree Genetics and Breeding, Northeast Forestry University, Harbin, China
- Jilin Provincial Key Laboratory of Tree and Grass Genetics and Breeding, College of Forestry and Grassland Science, Jilin Agricultural University, Changchun, China
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Kumar D, Malik N, Sengar RS, Yadav B, Singh AK, Yadav CL, Yadav MK. Transcriptional Regulation in Sugarcane under Water Deficit during Formative Growth Stage. CYTOL GENET+ 2021. [DOI: 10.3103/s0095452721060062] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Dong X, Deng H, Ma W, Zhou Q, Liu Z. Genome-wide identification of the MADS-box transcription factor family in autotetraploid cultivated alfalfa (Medicago sativa L.) and expression analysis under abiotic stress. BMC Genomics 2021; 22:603. [PMID: 34362293 PMCID: PMC8348820 DOI: 10.1186/s12864-021-07911-9] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Accepted: 07/23/2021] [Indexed: 02/06/2023] Open
Abstract
Background Alfalfa, the “queen of forage”, is the most extensively cultivated forage legume in the world. The development and yield of alfalfa are seriously limited by abiotic stress. MADS-box transcription factors are one of the largest gene families and play a pivotal role in plant development and abiotic stress. However, little is known regarding the MADS-box transcription factors in autotetraploid cultivated alfalfa. Results In the present study, we identified 120 MsMADS-box genes in the alfalfa genome. Phylogenetic analysis indicated that 75 type-I MsMADS-box genes were classified into the Mα, Mβ, and Mγ subgroups, and 45 type-II MsMADS-box genes were classified into 11 subgroups. The promoter region of MsMADS-box genes containing several hormone and stress related elements. Chromosomal location analysis revealed that 117 MsMADS-box genes were unevenly distributed on 32 chromosomes, and the remaining three genes were located on unmapped scaffolds. A total of nine pairs of segmental duplications and four groups of tandem duplications were found. Expression analysis showed that MsMADS-box genes were differentially expressed in various tissues and under abiotic stresses. qRT-PCR analysis revealed that the expression profiles of eight selected MsMADS-box genes were distinct under various stresses. Conclusions In this study, MsMADS-box genes were identified in the cultivated alfalfa genome based on autotetraploid level, and further confirmed by Gene Ontology (GO) analysis, phylogenetic analysis, sequence features and expression analysis. Taken together, these findings will provide clues for further study of MsMADS-box functions and alfalfa molecular breeding. Our study is the first to systematically identify and characterize the MADS-box transcription factors in autotetraploid cultivated alfalfa (Medicago sativa L.), and eight MsMADS-box genes were significantly involved in response to various stresses. Supplementary Information The online version contains supplementary material available at 10.1186/s12864-021-07911-9.
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Affiliation(s)
- Xueming Dong
- State Key Laboratory of Grassland Agro-ecosystems, Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture and Rural Affairs, Engineering Research Center of Grassland Industry, Ministry of Education, College of Pastoral Agriculture Science and Technology, Lanzhou University, 730000, Lanzhou, People's Republic of China
| | - Hao Deng
- State Key Laboratory of Grassland Agro-ecosystems, Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture and Rural Affairs, Engineering Research Center of Grassland Industry, Ministry of Education, College of Pastoral Agriculture Science and Technology, Lanzhou University, 730000, Lanzhou, People's Republic of China
| | - Wenxue Ma
- State Key Laboratory of Grassland Agro-ecosystems, Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture and Rural Affairs, Engineering Research Center of Grassland Industry, Ministry of Education, College of Pastoral Agriculture Science and Technology, Lanzhou University, 730000, Lanzhou, People's Republic of China
| | - Qiang Zhou
- State Key Laboratory of Grassland Agro-ecosystems, Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture and Rural Affairs, Engineering Research Center of Grassland Industry, Ministry of Education, College of Pastoral Agriculture Science and Technology, Lanzhou University, 730000, Lanzhou, People's Republic of China
| | - Zhipeng Liu
- State Key Laboratory of Grassland Agro-ecosystems, Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture and Rural Affairs, Engineering Research Center of Grassland Industry, Ministry of Education, College of Pastoral Agriculture Science and Technology, Lanzhou University, 730000, Lanzhou, People's Republic of China.
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Danakumara T, Kumari J, Singh AK, Sinha SK, Pradhan AK, Sharma S, Jha SK, Bansal R, Kumar S, Jha GK, Yadav MC, Prasad PV. Genetic Dissection of Seedling Root System Architectural Traits in a Diverse Panel of Hexaploid Wheat through Multi-Locus Genome-Wide Association Mapping for Improving Drought Tolerance. Int J Mol Sci 2021; 22:7188. [PMID: 34281242 PMCID: PMC8268147 DOI: 10.3390/ijms22137188] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2021] [Revised: 06/27/2021] [Accepted: 06/28/2021] [Indexed: 11/25/2022] Open
Abstract
Cultivars with efficient root systems play a major role in enhancing resource use efficiency, particularly water absorption, and thus in drought tolerance. In this study, a diverse wheat association panel of 136 wheat accessions including mini core subset was genotyped using Axiom 35k Breeders' Array to identify genomic regions associated with seedling stage root architecture and shoot traits using multi-locus genome-wide association studies (ML-GWAS). The association panel revealed a wide variation of 1.5- to 50-fold and were grouped into six clusters based on 15 traits. Six different ML-GWAS models revealed 456 significant quantitative trait nucleotides (QTNs) for various traits with phenotypic variance in the range of 0.12-38.60%. Of these, 87 QTNs were repeatedly detected by two or more models and were considered reliable genomic regions for the respective traits. Among these QTNs, eleven were associated with average diameter and nine each for second order lateral root number (SOLRN), root volume (RV) and root length density (RLD). A total of eleven genomic regions were pleiotropic and each controlled two or three traits. Some important candidate genes such as Formin homology 1, Ubiquitin-like domain superfamily and ATP-dependent 6-phosphofructokinase were identified from the associated genomic regions. The genomic regions/genes identified in this study could potentially be targeted for improving root traits and drought tolerance in wheat.
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Affiliation(s)
- Thippeswamy Danakumara
- Division of Genetics, Indian Council of Agricultural Research (ICAR)—Indian Agricultural Research Institute, New Delhi 110012, India; (T.D.); (S.K.J.)
| | - Jyoti Kumari
- Division of Germplasm Evaluation, ICAR-National Bureau of Plant Genetic Resources, New Delhi 110012, India; (S.S.); (R.B.)
| | - Amit Kumar Singh
- Division of Genomic Resources, ICAR-National Bureau of Plant Genetic Resources, New Delhi 110012, India; (A.K.S.); (A.K.P.); (S.K.); (M.C.Y.)
| | - Subodh Kumar Sinha
- ICAR-National Institute of Plant Biotechnology, New Delhi 110012, India;
| | - Anjan Kumar Pradhan
- Division of Genomic Resources, ICAR-National Bureau of Plant Genetic Resources, New Delhi 110012, India; (A.K.S.); (A.K.P.); (S.K.); (M.C.Y.)
| | - Shivani Sharma
- Division of Germplasm Evaluation, ICAR-National Bureau of Plant Genetic Resources, New Delhi 110012, India; (S.S.); (R.B.)
| | - Shailendra Kumar Jha
- Division of Genetics, Indian Council of Agricultural Research (ICAR)—Indian Agricultural Research Institute, New Delhi 110012, India; (T.D.); (S.K.J.)
| | - Ruchi Bansal
- Division of Germplasm Evaluation, ICAR-National Bureau of Plant Genetic Resources, New Delhi 110012, India; (S.S.); (R.B.)
| | - Sundeep Kumar
- Division of Genomic Resources, ICAR-National Bureau of Plant Genetic Resources, New Delhi 110012, India; (A.K.S.); (A.K.P.); (S.K.); (M.C.Y.)
| | - Girish Kumar Jha
- Division of Agricultural Economics, ICAR-Indian Agricultural Research Institute, New Delhi 110012, India;
| | - Mahesh C. Yadav
- Division of Genomic Resources, ICAR-National Bureau of Plant Genetic Resources, New Delhi 110012, India; (A.K.S.); (A.K.P.); (S.K.); (M.C.Y.)
| | - P.V. Vara Prasad
- Department of Agronomy, Kansas State University, Manhattan, KS 66506, USA;
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Characteristics of banana B genome MADS-box family demonstrate their roles in fruit development, ripening, and stress. Sci Rep 2020; 10:20840. [PMID: 33257717 PMCID: PMC7705751 DOI: 10.1038/s41598-020-77870-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2020] [Accepted: 11/11/2020] [Indexed: 11/09/2022] Open
Abstract
MADS-box genes are critical regulators of growth and development in flowering plants. Sequencing of the Musa balbisiana (B) genome has provided a platform for the systematic analysis of the MADS-box gene family in the important banana ancestor Musa balbisiana. Seventy-seven MADS-box genes, including 18 type I and 59 type II, were strictly identified from the banana (Pisang Klutuk Wulung, PKW, 2n = 2x = 22) B genome. These genes have been preferentially placed on the banana B genome. Evolutionary analysis suggested that M. balbisiana MCM1-AGAMOUS-DEFICIENS-SRF (MbMADS) might be organized into the MIKCc, MIKC*, Mα, Mβ, and Mγ groups according to the phylogeny. MIKCc was then further categorized into 10 subfamilies according to conserved motif and gene structure analyses. The well-defined MADS-box genes highlight gene birth and death in banana. MbMADSes originated from the same ancestor as MaMADSes. Transcriptome analysis in cultivated banana (ABB) revealed that MbMADSes were conserved and differentially expressed in several organs, in various fruit developing and ripening stages, and in stress treatments, indicating the participation of these genes in fruit development, ripening, and stress responses. Of note, SEP/AGL2 and AG, as well as other several type II MADS-box genes, including the STMADS11 and TM3/SOC1 subfamilies, indicated elevated expression throughout banana fruit development, ripening, and stress treatments, indicating their new parts in controlling fruit development and ripening. According to the co-expression network analysis, MbMADS75 interacted with bZIP and seven other transcription factors to perform its function. This systematic analysis reveals fruit development, ripening, and stress candidate MbMADSes genes for additional functional studies in plants, improving our understanding of the transcriptional regulation of MbMADSes genes and providing a base for genetic modification of MADS-mediated fruit development, ripening, and stress.
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Wang Y, Zhang J, Hu Z, Guo X, Tian S, Chen G. Genome-Wide Analysis of the MADS-Box Transcription Factor Family in Solanum lycopersicum. Int J Mol Sci 2019; 20:ijms20122961. [PMID: 31216621 PMCID: PMC6627509 DOI: 10.3390/ijms20122961] [Citation(s) in RCA: 49] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2019] [Revised: 06/13/2019] [Accepted: 06/15/2019] [Indexed: 11/16/2022] Open
Abstract
MADS-box family genes encode transcription factors that are involved in multiple developmental processes in plants, especially in floral organ specification, fruit development, and ripening. However, a comprehensive analysis of tomato MADS-box family genes, which is an important model plant to study flower fruit development and ripening, remains obscure. To gain insight into the MADS-box genes in tomato, 131 tomato MADS-box genes were identified. These genes could be divided into five groups (Mα, Mβ, Mγ, Mδ, and MIKC) and were found to be located on all 12 chromosomes. We further analyzed the phylogenetic relationships among Arabidopsis and tomato, as well as the protein motif structure and exon–intron organization, to better understand the tomato MADS-box gene family. Additionally, owing to the role of MADS-box genes in floral organ identification and fruit development, the constitutive expression patterns of MADS-box genes at different stages in tomato development were identified. We analyzed 15 tomato MADS-box genes involved in floral organ identification and five tomato MADS-box genes related to fruit development by qRT-PCR. Collectively, our study provides a comprehensive and systematic analysis of the tomato MADS-box genes and would be valuable for the further functional characterization of some important members of the MADS-box gene family.
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Affiliation(s)
- Yunshu Wang
- Laboratory of molecular biology of tomato, Bioengineering College, Chongqing University, Chongqing 400044, China.
| | - Jianling Zhang
- Laboratory of molecular biology of tomato, Bioengineering College, Chongqing University, Chongqing 400044, China.
| | - Zongli Hu
- Laboratory of molecular biology of tomato, Bioengineering College, Chongqing University, Chongqing 400044, China.
| | - Xuhu Guo
- Laboratory of molecular biology of tomato, Bioengineering College, Chongqing University, Chongqing 400044, China.
| | - Shibing Tian
- The Institute of Vegetable Research, Chongqing Academy of Agricultural Sciences, Chongqing 401329, China.
| | - Guoping Chen
- Laboratory of molecular biology of tomato, Bioengineering College, Chongqing University, Chongqing 400044, China.
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Androsiuk P, Koc J, Chwedorzewska KJ, Górecki R, Giełwanowska I. Retrotransposon-based genetic variation of Poa annua populations from contrasting climate conditions. PeerJ 2019; 7:e6888. [PMID: 31143535 PMCID: PMC6525586 DOI: 10.7717/peerj.6888] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2018] [Accepted: 04/02/2019] [Indexed: 11/29/2022] Open
Abstract
Background Poa annua L. is an example of a plant characterized by abundant, worldwide distribution from polar to equatorial regions. Due to its high plasticity and extraordinary expansiveness, P. annua is considered an invasive species capable of occupying and surviving in a wide range of habitats including pioneer zones, areas intensively transformed by human activities, remote subarctic meadows and even the Antarctic Peninsula region. Methods In the present study, we evaluated the utility of inter-primer binding site (iPBS) markers for assessing the genetic variation of P. annua populations representing contrasting environments from the worldwide range of this species. The electrophoretic patterns of polymerase chain reaction products obtained for each individual were used to estimate the genetic diversity and differentiation between populations. Results iPBS genotyping revealed a pattern of genetic variation differentiating the six studied P. annua populations characterized by their different climatic conditions. According to the analysis of molecular variance, the greatest genetic variation was recorded among populations, whereas 41.75% was observed between individuals within populations. The results of principal coordinates analysis (PCoA) and model-based clustering analysis showed a clear subdivision of analyzed populations. According to PCoA, populations from Siberia and the Kola Peninsula were the most different from each other and showed the lowest genetic variability. The application of STRUCTURE software confirmed the unique character of the population from the Kola Peninsula. Discussion The lowest variability of the Siberia population suggested that it was subjected to genetic drift. However, although demographic expansion was indicated by negative values of Fu’s FS statistic and analysis of mismatch distribution, it was not followed by significant traces of a bottleneck or a founder effect. For the Antarctic population, the observed level of genetic variation was surprisingly high, despite the observed significant traces of bottleneck/founder effect following demographic expansion, and was similar to that observed in populations from Poland and the Balkans. For the Antarctic population, the multiple introduction events from different sources are considered to be responsible for such an observation. Moreover, the results of STRUCTURE and PCoA showed that the P. annua from Antarctica has the highest genetic similarity to populations from Europe. Conclusions The observed polymorphism should be considered as a consequence of the joint influence of external abiotic stress and the selection process. Environmental changes, due to their ability to induce transposon activation, lead to the acceleration of evolutionary processes through the production of genetic variability.
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Affiliation(s)
- Piotr Androsiuk
- Department of Plant Physiology, Genetics and Biotechnology, University of Warmia and Mazury in Olsztyn, Olsztyn, Poland
| | - Justyna Koc
- Department of Plant Physiology, Genetics and Biotechnology, University of Warmia and Mazury in Olsztyn, Olsztyn, Poland
| | | | - Ryszard Górecki
- Department of Plant Physiology, Genetics and Biotechnology, University of Warmia and Mazury in Olsztyn, Olsztyn, Poland
| | - Irena Giełwanowska
- Department of Plant Physiology, Genetics and Biotechnology, University of Warmia and Mazury in Olsztyn, Olsztyn, Poland
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Buy DD, Demkovych AE, Pirko YV, Blume YB. Analysis of α-Tubulin Gene Expression During Cold Acclimation of Winter and Spring Soft Wheat. CYTOL GENET+ 2019. [DOI: 10.3103/s0095452719010067] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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12
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Chen R, Ma J, Luo D, Hou X, Ma F, Zhang Y, Meng Y, Zhang H, Guo W. CaMADS, a MADS-box transcription factor from pepper, plays an important role in the response to cold, salt, and osmotic stress. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2019; 280:164-174. [PMID: 30823994 DOI: 10.1016/j.plantsci.2018.11.020] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2018] [Revised: 11/05/2018] [Accepted: 11/28/2018] [Indexed: 05/22/2023]
Abstract
MADS-box family transcription factors play essential roles in the growth and development of plants, and some MADS-box genes have also been found to participate in the stress-response. At present, little information regarding stress-related MADS-box genes is available in pepper. We isolated a MADS-box transcription factor gene from Capsicum annuum, which we named CaMADS. CaMADS expression is induced by low and high temperature, salt, and osmotic stress, and also by abscisic acid (ABA), salicylic acid (SA), methyl-jasmonic acid (MeJA), and CaCl2. To understand the function of CaMADS in the abiotic stress response, we generated pepper plants in which CaMADS expression was down-regulated using VIGS (Virus-induced Gene Silencing), and also transgenic Arabidopsis plants overexpressing CaMADS. We found that CaMADS-down-regulated seedlings were more seriously injured than WT after cold, NaCl, and mannitol treatment, and showed increased electrolyte leakage, malondialdehyde (MDA) levels, and lower chlorophyll content. CaMADS-overexpressing Arabidopsis plants were more tolerant to these stresses than WT, and showed significantly high survival rates and lower H2O2 and super oxide radical contents after cold treatment. CaMADS-overexpressing plants had higher germination rates and percentages of green cotyledons following NaCl and mannitol treatment. Root lengths and fresh weight in CaMADS-overexpressing plants were also significantly longer and higher, respectively, than in WT plants. Taken together, our results suggest that CaMADS functions as a positive stress-responsive transcription factor in the cold, salt, and osmotic stress signaling pathways.
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Affiliation(s)
- Rugang Chen
- College of Horticulture, Northwest A&F University, Yangling, Shaanxi, 712100, China; State Key Laboratory of Crop Stress Biology in Arid Areas, Northwest A&F University, China.
| | - Jihui Ma
- College of Horticulture, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Dan Luo
- College of Horticulture, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Xiaomeng Hou
- College of Horticulture, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Fang Ma
- College of Horticulture, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Yumeng Zhang
- College of Horticulture, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Yuancheng Meng
- College of Horticulture, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Huafeng Zhang
- College of Horticulture, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Weili Guo
- College of Horticulture, Northwest A&F University, Yangling, Shaanxi, 712100, China
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Struk S, Jacobs A, Sánchez Martín-Fontecha E, Gevaert K, Cubas P, Goormachtig S. Exploring the protein-protein interaction landscape in plants. PLANT, CELL & ENVIRONMENT 2019; 42:387-409. [PMID: 30156707 DOI: 10.1111/pce.13433] [Citation(s) in RCA: 54] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/06/2018] [Accepted: 08/16/2018] [Indexed: 05/24/2023]
Abstract
Protein-protein interactions (PPIs) represent an essential aspect of plant systems biology. Identification of key protein players and their interaction networks provide crucial insights into the regulation of plant developmental processes and into interactions of plants with their environment. Despite the great advance in the methods for the discovery and validation of PPIs, still several challenges remain. First, the PPI networks are usually highly dynamic, and the in vivo interactions are often transient and difficult to detect. Therefore, the properties of the PPIs under study need to be considered to select the most suitable technique, because each has its own advantages and limitations. Second, besides knowledge on the interacting partners of a protein of interest, characteristics of the interaction, such as the spatial or temporal dynamics, are highly important. Hence, multiple approaches have to be combined to obtain a comprehensive view on the PPI network present in a cell. Here, we present the progress in commonly used methods to detect and validate PPIs in plants with a special emphasis on the PPI features assessed in each approach and how they were or can be used for the study of plant interactions with their environment.
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Affiliation(s)
- Sylwia Struk
- Department of Plant Biotechnology and Bioinformatics, Ghent University, Ghent, Belgium
- Center for Plant Systems Biology, VIB, Ghent, Belgium
| | - Anse Jacobs
- Department of Plant Biotechnology and Bioinformatics, Ghent University, Ghent, Belgium
- Center for Plant Systems Biology, VIB, Ghent, Belgium
- Department of Biochemistry, Ghent University, Ghent, Belgium
- Center for Medical Biotechnology, VIB, Ghent, Belgium
| | - Elena Sánchez Martín-Fontecha
- Plant Molecular Genetics Department, Centro Nacional de Biotecnología (CSIC), Campus Universidad Autónoma de Madrid, Madrid, Spain
| | - Kris Gevaert
- Department of Biochemistry, Ghent University, Ghent, Belgium
- Center for Medical Biotechnology, VIB, Ghent, Belgium
| | - Pilar Cubas
- Plant Molecular Genetics Department, Centro Nacional de Biotecnología (CSIC), Campus Universidad Autónoma de Madrid, Madrid, Spain
| | - Sofie Goormachtig
- Department of Plant Biotechnology and Bioinformatics, Ghent University, Ghent, Belgium
- Center for Plant Systems Biology, VIB, Ghent, Belgium
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Szaker HM, Darkó É, Medzihradszky A, Janda T, Liu HC, Charng YY, Csorba T. miR824/AGAMOUS-LIKE16 Module Integrates Recurring Environmental Heat Stress Changes to Fine-Tune Poststress Development. FRONTIERS IN PLANT SCIENCE 2019; 10:1454. [PMID: 31824525 PMCID: PMC6886564 DOI: 10.3389/fpls.2019.01454] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2019] [Accepted: 10/18/2019] [Indexed: 05/19/2023]
Abstract
Plant development is continually fine-tuned based on environmental factors. How environmental perturbations are integrated into the developmental programs and how poststress adaptation is regulated remains an important topic to dissect. Vegetative to reproductive phase change is a very important developmental transition that is complexly regulated based on endogenous and exogenous cues. Proper timing of flowering is vital for reproductive success. It has been shown previously that AGAMOUS LIKE 16 (AGL16), a MADS-box transcription factor negatively regulates flowering time transition through FLOWERING LOCUS T (FT), a central downstream floral integrator. AGL16 itself is negatively regulated by the microRNA miR824. Here we present a comprehensive molecular analysis of miR824/AGL16 module changes in response to mild and recurring heat stress. We show that miR824 accumulates gradually in response to heat due to the combination of transient transcriptional induction and posttranscriptional stability. miR824 induction requires heat shock cis-elements and activity of the HSFA1 family and HSFA2 transcription factors. Parallel to miR824 induction, its target AGL16 is decreased, implying direct causality. AGL16 posttranscriptional repression during heat stress, however, is more complex, comprising of a miRNA-independent, and a miR824-dependent pathway. We also show that AGL16 expression is leaf vein-specific and overlaps with miR824 (and FT) expression. AGL16 downregulation in response to heat leads to a mild derepression of FT. Finally, we present evidence showing that heat stress regulation of miR824/AGL16 is conserved within Brassicaceae. In conclusion, due to the enhanced post-transcriptional stability of miR824, stable repression of AGL16 is achieved following heat stress. This may serve to fine-tune FT levels and alter flowering time transition. Stress-induced miR824, therefore, can act as a "posttranscriptional memory factor" to extend the acute impact of environmental fluctuations in the poststress period.
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Affiliation(s)
- Henrik Mihály Szaker
- Agricultural Biotechnology Institute, NARIC, Godollo, Hungary
- Faculty of Natural Sciences, Eötvös Lóránd University, Budapest, Hungary
| | - Éva Darkó
- Agricultural Institute, Centre for Agricultural Research, Hungarian Academy of Sciences, Martonvásár, Hungary
| | | | - Tibor Janda
- Agricultural Institute, Centre for Agricultural Research, Hungarian Academy of Sciences, Martonvásár, Hungary
| | - Hsiang-chin Liu
- Agricultural Biotechnology Research Center, Academia Sinica, Taipei, Taiwan
| | - Yee-yung Charng
- Agricultural Biotechnology Research Center, Academia Sinica, Taipei, Taiwan
| | - Tibor Csorba
- Agricultural Biotechnology Institute, NARIC, Godollo, Hungary
- *Correspondence: Tibor Csorba,
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Combinatorial Interactions of Biotic and Abiotic Stresses in Plants and Their Molecular Mechanisms: Systems Biology Approach. Mol Biotechnol 2018; 60:636-650. [PMID: 29943149 DOI: 10.1007/s12033-018-0100-9] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Plants are continually facing biotic and abiotic stresses, and hence, they need to respond and adapt to survive. Plant response during multiple and combined biotic and abiotic stresses is highly complex and varied than the individual stress. These stresses resulted alteration of plant behavior through regulating the levels of microRNA, heat shock proteins, epigenetic variations. These variations can cause many adverse effects on the growth and development of the plant. Further, in natural conditions, several abiotic stresses causing factors make the plant more susceptible to pathogens infections and vice-versa. A very intricate and multifaceted interactions of various biomolecules are involved in metabolic pathways that can direct towards a cross-tolerance and improvement of plant's defence system. Systems biology approach plays a significant role in the investigation of these molecular interactions. The valuable information obtained by systems biology will help to develop stress-resistant plant varieties against multiple stresses. Thus, this review aims to decipher various multilevel interactions at the molecular level under combinatorial biotic and abiotic stresses and the role of systems biology to understand these molecular interactions.
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Pawłowicz I, Waśkiewicz A, Perlikowski D, Rapacz M, Ratajczak D, Kosmala A. Remodeling of chloroplast proteome under salinity affects salt tolerance of Festuca arundinacea. PHOTOSYNTHESIS RESEARCH 2018; 137:475-492. [PMID: 29881986 DOI: 10.1007/s11120-018-0527-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2017] [Accepted: 05/29/2018] [Indexed: 06/08/2023]
Abstract
Acclimation of photosynthetic apparatus to variable environmental conditions is an important component of tolerance to dehydration stresses, including salinity. The present study deals with the research on alterations in chloroplast proteome of the forage grasses. Based on chlorophyll fluorescence parameters, two genotypes of a model grass species-Festuca arundinacea with distinct levels of salinity tolerance: low salt tolerant (LST) and high salt tolerant (HST), were selected. Next, two-dimensional electrophoresis and mass spectrometry were applied under both control and salt stress conditions to identify proteins accumulated differentially between these two genotypes. The physiological analysis revealed that under NaCl treatment the studied plants differed in photosystem II activity, water content, and ion accumulation. The differentially accumulated proteins included ATPase B, ATP synthase, ribulose-1,5-bisphosphate carboxylase large and small subunits, cytochrome b6-f complex iron-sulfur subunit, oxygen-evolving enhancer proteins (OEE), OEE1 and OEE2, plastidic fructose-bisphosphate aldolase (pFBA), and lipocalin. A higher level of lipocalin, potentially involved in prevention of lipid peroxidation under stress, was also observed in the HST genotype. Our physiological and proteomic results performed for the first time on the species of forage grasses clearly showed that chloroplast metabolism adjustment could be a crucial factor in developing salinity tolerance.
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Affiliation(s)
- Izabela Pawłowicz
- Institute of Plant Genetics, Polish Academy of Sciences, Strzeszynska 34, 60-479, Poznan, Poland.
| | - Agnieszka Waśkiewicz
- Department of Chemistry, Poznań University of Life Sciences, Wojska Polskiego 75, 60-637, Poznan, Poland
| | - Dawid Perlikowski
- Institute of Plant Genetics, Polish Academy of Sciences, Strzeszynska 34, 60-479, Poznan, Poland
| | - Marcin Rapacz
- Department of Plant Physiology, Faculty of Agriculture and Economics, University of Agriculture in Krakow, Podluzna 3, 30-239, Krakow, Poland
| | - Dominika Ratajczak
- Institute of Plant Genetics, Polish Academy of Sciences, Strzeszynska 34, 60-479, Poznan, Poland
| | - Arkadiusz Kosmala
- Institute of Plant Genetics, Polish Academy of Sciences, Strzeszynska 34, 60-479, Poznan, Poland
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Khan SA, Li MZ, Wang SM, Yin HJ. Revisiting the Role of Plant Transcription Factors in the Battle against Abiotic Stress. Int J Mol Sci 2018; 19:ijms19061634. [PMID: 29857524 PMCID: PMC6032162 DOI: 10.3390/ijms19061634] [Citation(s) in RCA: 124] [Impact Index Per Article: 20.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2018] [Revised: 05/10/2018] [Accepted: 05/24/2018] [Indexed: 01/01/2023] Open
Abstract
Owing to diverse abiotic stresses and global climate deterioration, the agricultural production worldwide is suffering serious losses. Breeding stress-resilient crops with higher quality and yield against multiple environmental stresses via application of transgenic technologies is currently the most promising approach. Deciphering molecular principles and mining stress-associate genes that govern plant responses against abiotic stresses is one of the prerequisites to develop stress-resistant crop varieties. As molecular switches in controlling stress-responsive genes expression, transcription factors (TFs) play crucial roles in regulating various abiotic stress responses. Hence, functional analysis of TFs and their interaction partners during abiotic stresses is crucial to perceive their role in diverse signaling cascades that many researchers have continued to undertake. Here, we review current developments in understanding TFs, with particular emphasis on their functions in orchestrating plant abiotic stress responses. Further, we discuss novel molecular mechanisms of their action under abiotic stress conditions. This will provide valuable information for understanding regulatory mechanisms to engineer stress-tolerant crops.
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Affiliation(s)
- Sardar-Ali Khan
- State Key Laboratory of Grassland Agro-ecosystems, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou 730000, China.
| | - Meng-Zhan Li
- State Key Laboratory of Grassland Agro-ecosystems, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou 730000, China.
| | - Suo-Min Wang
- State Key Laboratory of Grassland Agro-ecosystems, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou 730000, China.
| | - Hong-Ju Yin
- State Key Laboratory of Grassland Agro-ecosystems, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou 730000, China.
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18
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Kosová K, Vítámvás P, Urban MO, Prášil IT, Renaut J. Plant Abiotic Stress Proteomics: The Major Factors Determining Alterations in Cellular Proteome. FRONTIERS IN PLANT SCIENCE 2018; 9:122. [PMID: 29472941 PMCID: PMC5810178 DOI: 10.3389/fpls.2018.00122] [Citation(s) in RCA: 137] [Impact Index Per Article: 22.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2017] [Accepted: 01/23/2018] [Indexed: 05/19/2023]
Abstract
HIGHLIGHTS: Major environmental and genetic factors determining stress-related protein abundance are discussed.Major aspects of protein biological function including protein isoforms and PTMs, cellular localization and protein interactions are discussed.Functional diversity of protein isoforms and PTMs is discussed. Abiotic stresses reveal profound impacts on plant proteomes including alterations in protein relative abundance, cellular localization, post-transcriptional and post-translational modifications (PTMs), protein interactions with other protein partners, and, finally, protein biological functions. The main aim of the present review is to discuss the major factors determining stress-related protein accumulation and their final biological functions. A dynamics of stress response including stress acclimation to altered ambient conditions and recovery after the stress treatment is discussed. The results of proteomic studies aimed at a comparison of stress response in plant genotypes differing in stress adaptability reveal constitutively enhanced levels of several stress-related proteins (protective proteins, chaperones, ROS scavenging- and detoxification-related enzymes) in the tolerant genotypes with respect to the susceptible ones. Tolerant genotypes can efficiently adjust energy metabolism to enhanced needs during stress acclimation. Stress tolerance vs. stress susceptibility are relative terms which can reflect different stress-coping strategies depending on the given stress treatment. The role of differential protein isoforms and PTMs with respect to their biological functions in different physiological constraints (cellular compartments and interacting partners) is discussed. The importance of protein functional studies following high-throughput proteome analyses is presented in a broader context of plant biology. In summary, the manuscript tries to provide an overview of the major factors which have to be considered when interpreting data from proteomic studies on stress-treated plants.
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Affiliation(s)
- Klára Kosová
- Division of Crop Genetics and Breeding, Laboratory of Plant Stress Biology and Biotechnology, Crop Research Institute, Prague, Czechia
- Department of Experimental Plant Biology, Faculty of Science, Charles University in Prague, Prague, Czechia
| | - Pavel Vítámvás
- Division of Crop Genetics and Breeding, Laboratory of Plant Stress Biology and Biotechnology, Crop Research Institute, Prague, Czechia
- Department of Experimental Plant Biology, Faculty of Science, Charles University in Prague, Prague, Czechia
| | - Milan O. Urban
- Division of Crop Genetics and Breeding, Laboratory of Plant Stress Biology and Biotechnology, Crop Research Institute, Prague, Czechia
- Department of Experimental Plant Biology, Faculty of Science, Charles University in Prague, Prague, Czechia
| | - Ilja T. Prášil
- Division of Crop Genetics and Breeding, Laboratory of Plant Stress Biology and Biotechnology, Crop Research Institute, Prague, Czechia
| | - Jenny Renaut
- Environmental Research and Technology Platform, Environmental Research and Innovation, Luxembourg Institute of Science and Technology (LIST), Esch-sur-Alzette, Luxembourg
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Yin W, Yu X, Chen G, Tang B, Wang Y, Liao C, Zhang Y, Hu Z. Suppression of SlMBP15 Inhibits Plant Vegetative Growth and Delays Fruit Ripening in Tomato. FRONTIERS IN PLANT SCIENCE 2018; 9:938. [PMID: 30022990 PMCID: PMC6039764 DOI: 10.3389/fpls.2018.00938] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2018] [Accepted: 06/11/2018] [Indexed: 05/04/2023]
Abstract
MADS-box genes have been demonstrated to participate in a number of processes in tomato development, especially fruit ripening. In this study, we reported a novel MADS-box gene, SlMBP15, which is implicated in fruit ripening. Based on statistical analysis, the ripening time of SlMBP15-silenced tomato was delayed by 2-4 days compared with that of the wild-type (WT). The accumulation of carotenoids and biosynthesis of ethylene in fruits were decreased in SlMBP15-silenced tomato. Genes related to carotenoid and ethylene biosynthesis were greatly repressed. SlMBP15 can interact with RIN, a MADS-box regulator affecting the carotenoid accumulation and ethylene biosynthesis in tomato. In addition, SlMBP15-silenced tomato produced dark green leaves, and its plant height was reduced. The gibberellin (GA) content of transgenic plants was lower than that of the WT and GA biosynthesis genes were repressed. These results demonstrated that SlMBP15 not only positively regulated tomato fruit ripening but also affected the morphogenesis of the vegetative organs.
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Affiliation(s)
- Wencheng Yin
- Laboratory of Molecular Biology of Tomato, Bioengineering College, Chongqing University, Chongqing, China
| | - Xiaohui Yu
- Laboratory of Molecular Biology of Tomato, Bioengineering College, Chongqing University, Chongqing, China
| | - Guoping Chen
- Laboratory of Molecular Biology of Tomato, Bioengineering College, Chongqing University, Chongqing, China
| | - Boyan Tang
- Laboratory of Molecular Biology of Tomato, Bioengineering College, Chongqing University, Chongqing, China
| | - Yunshu Wang
- Laboratory of Molecular Biology of Tomato, Bioengineering College, Chongqing University, Chongqing, China
| | - Changguang Liao
- Laboratory of Molecular Biology of Tomato, Bioengineering College, Chongqing University, Chongqing, China
| | - Yanjie Zhang
- School of Life Sciences, Zhengzhou University, Zhengzhou, China
| | - Zongli Hu
- Laboratory of Molecular Biology of Tomato, Bioengineering College, Chongqing University, Chongqing, China
- *Correspondence: Zongli Hu,
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20
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Ayalew H, Liu H, Börner A, Kobiljski B, Liu C, Yan G. Genome-Wide Association Mapping of Major Root Length QTLs Under PEG Induced Water Stress in Wheat. FRONTIERS IN PLANT SCIENCE 2018; 9:1759. [PMID: 30555498 PMCID: PMC6281995 DOI: 10.3389/fpls.2018.01759] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2018] [Accepted: 11/12/2018] [Indexed: 05/18/2023]
Abstract
Roots are vital plant organs that determine adaptation to various soil conditions. The present study evaluated a core winter wheat collection for rooting depth under PEG induced early stage water stress and non-stress growing conditions. Analysis of phenotypic data indicated highly significant (p < 0.01) variation among genotypes. Broad sense heritability of 59 and 73% with corresponding genetic gains of 7.6 and 9.7 (5% selection intensity) were found under non-stress and stress conditions, respectively. The test genotypes were grouped in to three distinct clusters using unweighted pair group method with arithmetic mean (UPGMA) clustering based on maximum Euclidian distance. The first three principal components gave optimum mixed linear model for genome wide association study (GWAS). Linkage disequilibrium (LD) analysis showed significant LD (p < 0.05) amongst 15% of total marker pairs (25,125). Nearly 16% of the significant LDs were among inter chromosomal marker pairs. GWAS revealed five significant root length QTLs spread across four chromosomes. None of the identified QTLs were common between the two growing conditions. Stress specific QTLs, combined explaining 31% of phenotypic variation were located on chromosomes 2B (wPt6278) and 3B (wPt1159). Similarly, two of the three QTLs (wPt0021 and wPt8890) identified under the non-stress condition were found on chromosomes 3B and 5B, respectively. The B genome showed significant importance in controlling root growth both under stress and non-stress conditions. The identified markers can potentially be validated and used for marker assisted selection.
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Affiliation(s)
- Habtamu Ayalew
- School of Agriculture and Environment, Faculty of Science, The UWA Institute of Agriculture, The University of Western Australia, Crawley, WA, Australia
- Noble Research Institute LLC, Ardmore, OK, United States
| | - Hui Liu
- School of Agriculture and Environment, Faculty of Science, The UWA Institute of Agriculture, The University of Western Australia, Crawley, WA, Australia
| | - Andreas Börner
- Genebank Department, Leibniz Institute of Plant Genetics and Crop Plant Research (IPK), Gatersleben, Germany
| | | | - Chunji Liu
- CSIRO Agriculture Flagship, Townsville, QLD, Australia
| | - Guijun Yan
- School of Agriculture and Environment, Faculty of Science, The UWA Institute of Agriculture, The University of Western Australia, Crawley, WA, Australia
- *Correspondence: Guijun Yan,
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21
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Islam A, Leung S, Nikmatullah A, Dijkwel PP, McManus MT. Kunitz Proteinase Inhibitors Limit Water Stress Responses in White Clover ( Trifolium repens L.) Plants. FRONTIERS IN PLANT SCIENCE 2017; 8:1683. [PMID: 29046678 PMCID: PMC5632647 DOI: 10.3389/fpls.2017.01683] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2017] [Accepted: 09/13/2017] [Indexed: 05/22/2023]
Abstract
The response of plants to water deficiency or drought is a complex process, the perception of which is triggered at the molecular level before any visible morphological responses are detected. It was found that different groups of plant proteinase inhibitors (PIs) are induced and play an active role during abiotic stress conditions such as drought. Our previous work with the white clover (Trifolium repens L.) Kunitz Proteinase Inhibitor (Tr-KPI) gene family showed that Tr-KPIs are differentially regulated to ontogenetic and biotic stress associated cues and that, at least some members of this gene family may be required to maintain cellular homeostasis. Altered cellular homeostasis may also affect abiotic stress responses and therefore, we aimed to understand if distinct Tr-PKI members function during drought stress. First, the expression level of three Tr-KPI genes, Tr-KPI1, Tr-KPI2, and Tr-KPI5, was measured in two cultivars and one white clover ecotype with differing capacity to tolerate drought. The expression of Tr-KPI1 and Tr-KPI5 increased in response to water deficiency and this was exaggerated when the plants were treated with a previous period of water deficiency. In contrast, proline accumulation and increased expression of Tr-NCED1, a gene encoding a protein involved in ABA biosynthesis, was delayed in plants that experienced a previous drought period. RNAi knock-down of Tr-KPI1 and Tr-KPI5 resulted in increased proline accumulation in leaf tissue of plants grown under both well-watered and water-deficit conditions. In addition, increased expression of genes involved in ethylene biosynthesis was found. The data suggests that Tr-KPIs, particularly Tr-KPI5, have an explicit function during water limitation. The results also imply that the Tr-KPI family has different in planta proteinase targets and that the functions of this protein family are not solely restricted to one of storage proteins or in response to biotic stress.
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Affiliation(s)
| | | | | | - Paul P. Dijkwel
- Institute of Fundamental Sciences, Massey University, Palmerston North, New Zealand
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22
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Prator CA, Kashiwagi CM, Vončina D, Almeida RPP. Infection and Colonization of Nicotiana benthamiana by Grapevine leafroll-associated virus 3. Virology 2017; 510:60-66. [PMID: 28710957 DOI: 10.1016/j.virol.2017.07.003] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2017] [Revised: 06/29/2017] [Accepted: 07/03/2017] [Indexed: 11/29/2022]
Abstract
Grapevine leafroll disease is an increasing problem in all grape-growing regions of the world. The most widespread agent of the disease, Grapevine leafroll-associated virus 3 (GLRaV-3), has never been shown to infect species outside of the genus Vitis. Virus transmission to several plant species used as model systems was tested using the vine mealybug, Planococcus ficus. We show that GLRaV-3 is able to infect Nicotiana benthamiana. Working with GLRaV-3 infected N. benthamiana revealed distinct advantages in comparison with its natural host Vitis vinifera, yielding both higher viral protein and virion concentrations in western blot and transmission electron microscopy observations, respectively. Immunogold labelling of thin sections through N. benthamiana petioles revealed filamentous particles in the phloem cells of GLRaV-3 positive plants. Comparison of assembled whole genomes from GLRaV-3 infected V. vinifera vs. N. benthamiana revealed substitutions in the 5' UTR. These results open new avenues and opportunities for GLRaV-3 research.
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Affiliation(s)
- Cecilia A Prator
- Department of Environmental Science, Policy, and Management, University of California, Berkeley, CA 94720, USA
| | - Chloe M Kashiwagi
- Department of Environmental Science, Policy, and Management, University of California, Berkeley, CA 94720, USA
| | - Darko Vončina
- Department of Plant Pathology, University of Zagreb Faculty of Agriculture, Zagreb, Croatia
| | - Rodrigo P P Almeida
- Department of Environmental Science, Policy, and Management, University of California, Berkeley, CA 94720, USA.
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23
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Genome-wide characterization and expression analysis of the aldehyde dehydrogenase (ALDH) gene superfamily under abiotic stresses in cotton. Gene 2017; 628:230-245. [PMID: 28711668 DOI: 10.1016/j.gene.2017.07.034] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2017] [Revised: 06/24/2017] [Accepted: 07/11/2017] [Indexed: 11/20/2022]
Abstract
In plants, aldehyde dehydrogenases (ALDHs) function as 'aldehyde scavengers' by removing reactive aldehydes and thus play important roles in stress responses. To date, 30 ALDHs have been identified in Gossypium raimondii, whereas ALDHs have not been studied in Gossypium arboreum or in tetraploid cotton. In this study, we identified 30, 59 and 59 aldehyde dehydrogenase (ALDH) genes from G. arboreum, G. hirsutum and G. barbadense, respectively. Gene structure analysis revealed that members of the same family exhibit similar exon-intron structures and structural domains, and all members of the ALDH18 family possess a distinct AA-kinase domain. Synteny analysis showed that segmental and tandem duplications have played an important role in the expansion and evolution of ALDHs in cotton. Phylogenetic and synteny analysis between G. arboreum and G. raimondii demonstrated that all GaALDHs and GrALDHs are orthologous and that most GaALDHs are located in syntenic blocks corresponding to those of G. raimondii, implying that these genes appeared before the divergence of G. arboreum and G. raimondii and that no expansion of the ALDH superfamily has occurred in these two cotton species. Quantitative real-time PCR analysis revealed that the majority of GaALDHs and GhALDHs are up-regulated under conditions of high salinity and drought, indicating that these genes may be stress responsive. The findings of this study, based on genome-wide identification of ALDHs in Gossypium and analysis of their evolution and expression, provide a foundation for further analysis of ALDHs and suggest potential target genes for improving stress resistance in cotton.
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Cheng L, Wang Y, He Q, Li H, Zhang X, Zhang F. Comparative proteomics illustrates the complexity of drought resistance mechanisms in two wheat (Triticum aestivum L.) cultivars under dehydration and rehydration. BMC PLANT BIOLOGY 2016; 16:188. [PMID: 27576435 PMCID: PMC5006382 DOI: 10.1186/s12870-016-0871-8] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2016] [Accepted: 08/10/2016] [Indexed: 05/18/2023]
Abstract
BACKGROUND Drought stress is one of the most adverse environmental constraints to plant growth and productivity. Comparative proteomics of drought-tolerant and sensitive wheat genotypes is a strategy to understand the complexity of molecular mechanism of wheat in response to drought. This study attempted to extend findings regarding the potential proteomic dynamics in wheat under drought stress and to enrich the research content of drought tolerance mechanism. RESULTS A comparative proteomics approach was applied to analyze proteome change of Xihan No. 2 (a drought-tolerant cultivar) and Longchun 23 (a drought-sensitive cultivar) subjected to a range of dehydration treatments (18 h, 24 h and 48 h) and rehydration treatment (R24 h) using 2-DE, respectively. Quantitative image analysis showed a total of 172 protein spots in Xihan No. 2 and 215 spots from Longchun 23 with their abundance significantly altered (p < 0.05) more than 2.5-fold. Out of these spots, a total of 84 and 64 differentially abundant proteins were identified by MALDI-TOF/TOF MS in Xihan No. 2 and Longchun 23, respectively. Most of these identified proteins were involved in metabolism, photosynthesis, defence and protein translation/processing/degradation in both two cultivars. In addition, the proteins involved in redox homeostasis, energy, transcription, cellular structure, signalling and transport were also identified. Furthermore, the comparative analysis of drought-responsive proteome allowed for the general elucidation of the major mechanisms associated with differential responses to drought of both two cultivars. These cellular processes work more cooperatively to re-establish homeostasis in Xihan No. 2 than Longchun 23. The resistance mechanisms of Xihan No. 2 mainly included changes in the metabolism of carbohydrates and amino acids as well as in the activation of more antioxidation and defense systems and in the levels of proteins involved in ATP synthesis and protein degradation/refolding. CONCLUSIONS This study revealed that the levels of a number of proteins involved in various cellular processes were affected by drought stress in two wheat cultivars with different drought tolerance. The results showed that there exist specific responses to drought in Xihan No. 2 and Longchun 23. The proposed hypothetical model would explain the interaction of these identified proteins that are associated with drought-responses in two cultivars, and help in developing strategies to improve drought tolerance in wheat.
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Affiliation(s)
- Lixiang Cheng
- College of Agronomy, Gansu Provincial Key Laboratory of Aridland Crop Science, Gansu Key Laboratory of Crop Improvement & Germplasm Enhancement, Research & Testing Center, Gansu Agricultural University, Lanzhou, China
| | - Yuping Wang
- College of Agronomy, Gansu Provincial Key Laboratory of Aridland Crop Science, Gansu Key Laboratory of Crop Improvement & Germplasm Enhancement, Research & Testing Center, Gansu Agricultural University, Lanzhou, China
| | - Qiang He
- College of Agronomy, Gansu Provincial Key Laboratory of Aridland Crop Science, Gansu Key Laboratory of Crop Improvement & Germplasm Enhancement, Research & Testing Center, Gansu Agricultural University, Lanzhou, China
| | - Huijun Li
- College of Agronomy, Gansu Provincial Key Laboratory of Aridland Crop Science, Gansu Key Laboratory of Crop Improvement & Germplasm Enhancement, Research & Testing Center, Gansu Agricultural University, Lanzhou, China
- Wuwei Agricultural and Animal Husbandry Bureau, Wuwei, China
| | - Xiaojing Zhang
- College of Agronomy, Gansu Provincial Key Laboratory of Aridland Crop Science, Gansu Key Laboratory of Crop Improvement & Germplasm Enhancement, Research & Testing Center, Gansu Agricultural University, Lanzhou, China
- Gansu Dingxi Academy of Agricultural Science, Dingxi, China
| | - Feng Zhang
- College of Agronomy, Gansu Provincial Key Laboratory of Aridland Crop Science, Gansu Key Laboratory of Crop Improvement & Germplasm Enhancement, Research & Testing Center, Gansu Agricultural University, Lanzhou, China
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Kosová K, Vítámvás P, Urban MO, Klíma M, Roy A, Prášil IT. Biological Networks Underlying Abiotic Stress Tolerance in Temperate Crops--A Proteomic Perspective. Int J Mol Sci 2015; 16:20913-42. [PMID: 26340626 PMCID: PMC4613235 DOI: 10.3390/ijms160920913] [Citation(s) in RCA: 65] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2015] [Revised: 07/16/2015] [Accepted: 08/10/2015] [Indexed: 12/26/2022] Open
Abstract
Abiotic stress factors, especially low temperatures, drought, and salinity, represent the major constraints limiting agricultural production in temperate climate. Under the conditions of global climate change, the risk of damaging effects of abiotic stresses on crop production increases. Plant stress response represents an active process aimed at an establishment of novel homeostasis under altered environmental conditions. Proteins play a crucial role in plant stress response since they are directly involved in shaping the final phenotype. In the review, results of proteomic studies focused on stress response of major crops grown in temperate climate including cereals: common wheat (Triticum aestivum), durum wheat (Triticum durum), barley (Hordeum vulgare), maize (Zea mays); leguminous plants: alfalfa (Medicago sativa), soybean (Glycine max), common bean (Phaseolus vulgaris), pea (Pisum sativum); oilseed rape (Brassica napus); potato (Solanum tuberosum); tobacco (Nicotiana tabaccum); tomato (Lycopersicon esculentum); and others, to a wide range of abiotic stresses (cold, drought, salinity, heat, imbalances in mineral nutrition and heavy metals) are summarized. The dynamics of changes in various protein functional groups including signaling and regulatory proteins, transcription factors, proteins involved in protein metabolism, amino acid metabolism, metabolism of several stress-related compounds, proteins with chaperone and protective functions as well as structural proteins (cell wall components, cytoskeleton) are briefly overviewed. Attention is paid to the differences found between differentially tolerant genotypes. In addition, proteomic studies aimed at proteomic investigation of multiple stress factors are discussed. In conclusion, contribution of proteomic studies to understanding the complexity of crop response to abiotic stresses as well as possibilities to identify and utilize protein markers in crop breeding processes are discussed.
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Affiliation(s)
- Klára Kosová
- Laboratory of Plant Stress Biology and Biotechnology, Division of Crop Genetics and Breeding, Crop Research Institute, Drnovská 507/73, 16106 Prague, Czech Republic.
| | - Pavel Vítámvás
- Laboratory of Plant Stress Biology and Biotechnology, Division of Crop Genetics and Breeding, Crop Research Institute, Drnovská 507/73, 16106 Prague, Czech Republic.
| | - Milan Oldřich Urban
- Laboratory of Plant Stress Biology and Biotechnology, Division of Crop Genetics and Breeding, Crop Research Institute, Drnovská 507/73, 16106 Prague, Czech Republic.
| | - Miroslav Klíma
- Laboratory of Plant Stress Biology and Biotechnology, Division of Crop Genetics and Breeding, Crop Research Institute, Drnovská 507/73, 16106 Prague, Czech Republic.
| | - Amitava Roy
- Research Institute of Agricultural Engineering, Drnovská 507, 16106 Prague, Czech Republic.
| | - Ilja Tom Prášil
- Laboratory of Plant Stress Biology and Biotechnology, Division of Crop Genetics and Breeding, Crop Research Institute, Drnovská 507/73, 16106 Prague, Czech Republic.
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Hao P, Zhu J, Gu A, Lv D, Ge P, Chen G, Li X, Yan Y. An integrative proteome analysis of different seedling organs in tolerant and sensitive wheat cultivars under drought stress and recovery. Proteomics 2015; 15:1544-63. [DOI: 10.1002/pmic.201400179] [Citation(s) in RCA: 73] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2014] [Revised: 11/09/2014] [Accepted: 12/18/2014] [Indexed: 01/18/2023]
Affiliation(s)
- Pengchao Hao
- College of Life Science; Capital Normal University; Beijing P. R. China
| | - Jiantang Zhu
- College of Life Science; Capital Normal University; Beijing P. R. China
| | - Aiqin Gu
- College of Life Science; Capital Normal University; Beijing P. R. China
| | - Dongwen Lv
- College of Life Science; Capital Normal University; Beijing P. R. China
| | - Pei Ge
- College of Life Science; Capital Normal University; Beijing P. R. China
| | - Guanxing Chen
- College of Life Science; Capital Normal University; Beijing P. R. China
| | - Xiaohui Li
- College of Life Science; Capital Normal University; Beijing P. R. China
| | - Yueming Yan
- College of Life Science; Capital Normal University; Beijing P. R. China
- Hubei Collaborative Innovation Center for Grain Industry (HCICGI); Jingzhou P. R. China
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27
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Saha G, Park JI, Jung HJ, Ahmed NU, Kayum MA, Chung MY, Hur Y, Cho YG, Watanabe M, Nou IS. Genome-wide identification and characterization of MADS-box family genes related to organ development and stress resistance in Brassica rapa. BMC Genomics 2015; 16:178. [PMID: 25881193 PMCID: PMC4422603 DOI: 10.1186/s12864-015-1349-z] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2014] [Accepted: 02/17/2015] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND MADS-box transcription factors (TFs) are important in floral organ specification as well as several other aspects of plant growth and development. Studies on stress resistance-related functions of MADS-box genes are very limited and no such functional studies in Brassica rapa have been reported. To gain insight into this gene family and to elucidate their roles in organ development and stress resistance, we performed genome-wide identification, characterization and expression analysis of MADS-box genes in B. rapa. RESULTS Whole-genome survey of B. rapa revealed 167 MADS-box genes, which were categorized into type I (Mα, Mβ and Mγ) and type II (MIKC(c) and MIKC*) based on phylogeny, protein motif structure and exon-intron organization. Expression analysis of 89 MIKC(c) and 11 MIKC* genes was then carried out. In addition to those with floral and vegetative tissue expression, we identified MADS-box genes with constitutive expression patterns at different stages of flower development. More importantly, from a low temperature-treated whole-genome microarray data set, 19 BrMADS genes were found to show variable transcript abundance in two contrasting inbred lines of B. rapa. Among these, 13 BrMADS genes were further validated and their differential expression was monitored in response to cold stress in the same two lines via qPCR expression analysis. Additionally, the set of 19 BrMADS genes was analyzed under drought and salt stress, and 8 and 6 genes were found to be induced by drought and salt, respectively. CONCLUSION The extensive annotation and transcriptome profiling reported in this study will be useful for understanding the involvement of MADS-box genes in stress resistance in addition to their growth and developmental functions, which ultimately provides the basis for functional characterization and exploitation of the candidate genes for genetic engineering of B. rapa.
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Affiliation(s)
- Gopal Saha
- Department of Horticulture, Sunchon National University, 413 Jungangno, Suncheon, Jeonnam, 540-742, Republic of Korea.
| | - Jong-In Park
- Department of Horticulture, Sunchon National University, 413 Jungangno, Suncheon, Jeonnam, 540-742, Republic of Korea.
| | - Hee-Jeong Jung
- Department of Horticulture, Sunchon National University, 413 Jungangno, Suncheon, Jeonnam, 540-742, Republic of Korea.
| | - Nasar Uddin Ahmed
- Department of Horticulture, Sunchon National University, 413 Jungangno, Suncheon, Jeonnam, 540-742, Republic of Korea.
| | - Md Abdul Kayum
- Department of Horticulture, Sunchon National University, 413 Jungangno, Suncheon, Jeonnam, 540-742, Republic of Korea.
| | - Mi-Young Chung
- Department of Agricultural Education, Sunchon National University, 413 Jungangno, Suncheon, Jeonnam, 540-742, Republic of Korea.
| | - Yoonkang Hur
- Department of Biology, Chungnam National University, 96 Daehangno, Gung-dong, Yuseong-gu, Daejeon, 305-764, Republic of Korea.
| | - Yong-Gu Cho
- Department of Crop Science, Chungbuk National University, 410 Seongbongro, Heungdokgu, Cheongju, 361-763, Republic of Korea.
| | - Masao Watanabe
- Laboratory of Plant Reproductive Genetics, Graduate School of Life Sciences, Tohoku University, 2-1-1, Katahira, Aoba-ku, Sendai, 980-8577, Japan.
| | - Ill-Sup Nou
- Department of Horticulture, Sunchon National University, 413 Jungangno, Suncheon, Jeonnam, 540-742, Republic of Korea.
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Deng W, Casao MC, Wang P, Sato K, Hayes PM, Finnegan EJ, Trevaskis B. Direct links between the vernalization response and other key traits of cereal crops. Nat Commun 2015; 6:5882. [PMID: 25562483 DOI: 10.1038/ncomms6882] [Citation(s) in RCA: 119] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2014] [Accepted: 11/17/2014] [Indexed: 11/09/2022] Open
Abstract
Transcription of the vernalization1 gene (VRN1) is induced by prolonged cold (vernalization) to trigger flowering of cereal crops, such as wheat and barley. VRN1 encodes a MADS box transcription factor that promotes flowering by regulating the expression of other genes. Here we use transcriptome sequencing (RNA-seq) and chromatin immunoprecipitation sequencing (ChIP-seq) to identify direct targets of VRN1. Over 500 genomic regions were identified as potential VRN1-binding targets by ChIP-seq. VRN1 binds the promoter of flowering locus T-like 1, a promoter of flowering in vernalized plants. VRN1 also targets vernalization2 and ODDSOC2, repressors of flowering that are downregulated in vernalized plants. RNA-seq identified additional VRN1 targets that might play roles in triggering flowering. Other targets of VRN1 include genes that play central roles in low-temperature-induced freezing tolerance, spike architecture and hormone metabolism. This provides evidence for direct regulatory links between the vernalization response pathway and other important traits in cereal crops.
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Affiliation(s)
- Weiwei Deng
- CSIRO, Agriculture, Canberra, Australian Capital Territory 2601, Australia
| | - M Cristina Casao
- CSIRO, Agriculture, Canberra, Australian Capital Territory 2601, Australia
| | - Penghao Wang
- CSIRO, Agriculture, Canberra, Australian Capital Territory 2601, Australia
| | - Kazuhiro Sato
- Institute of Plant Science and Resources, Okayama University, Kurashiki 710-0046, Japan
| | - Patrick M Hayes
- Department of Crop and Soil Science, Oregon State University, Corvallis, Oregon 97331, USA
| | - E Jean Finnegan
- CSIRO, Agriculture, Canberra, Australian Capital Territory 2601, Australia
| | - Ben Trevaskis
- CSIRO, Agriculture, Canberra, Australian Capital Territory 2601, Australia
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29
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Goodin MM, Zaitlin D, Naidu RA, Lommel SA. Nicotiana benthamiana: Its History and Future as a Model for Plant-Pathogen Interactions. MOLECULAR PLANT-MICROBE INTERACTIONS : MPMI 2015; 2015:28-39. [PMID: 27839076 DOI: 10.1094/mpmi-00-00-1015-rev.testissue] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Nicotiana benthamiana is the most widely used experimental host in plant virology, due mainly to the large number of diverse plant viruses that can successfully infect it. Addi- tionally, N. benthamiana is susceptible to a wide variety of other plant-pathogenic agents (such as bacteria, oomycetes, fungi, and so on), making this species a cornerstone of host-pathogen research, particularly in the context of innate immunity and defense signaling. Moreover, because it can be genetically transformed and regenerated with good efficiency and is amenable to facile methods for virus- induced gene silencing or transient protein expression, N. benthamiana is rapidly gaining popularity in plant biology, particularly in studies requiring protein localization, inter- action, or plant-based systems for protein expression and purification. Paradoxically, despite being an indispensable research model, little is known about the origins, genetic variation, or ecology of the N. benthamiana accessions cur- rently used by the research community. In addition to ad- dressing these latter topics, the purpose of this review is to provide information regarding sources for tools and reagents that can be used to support research in N. benthamiana. Finally, we propose that N. benthamiana is well situated to become a premier plant cell biology model, particularly for the virology community, who as a group were the first to recognize the potential of this unique Australian native.
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Affiliation(s)
| | - David Zaitlin
- 2 Kentucky Tobacco Research and Development Center (KTRDC), University of Kentucky, Lexington 40546, U.S.A
| | - Rayapati A Naidu
- 3 Department of Plant Pathology, Irrigated Agriculture Research & Extension Center, Washington State University, Prosser 99350, U.S.A
| | - Steven A Lommel
- 4 Department of Plant Pathology, North Carolina State University, Raleigh 27695, U.S.A
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30
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Sheth BP, Thaker VS. Plant systems biology: insights, advances and challenges. PLANTA 2014; 240:33-54. [PMID: 24671625 DOI: 10.1007/s00425-014-2059-5] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2013] [Accepted: 03/06/2014] [Indexed: 05/20/2023]
Abstract
Plants dwelling at the base of biological food chain are of fundamental significance in providing solutions to some of the most daunting ecological and environmental problems faced by our planet. The reductionist views of molecular biology provide only a partial understanding to the phenotypic knowledge of plants. Systems biology offers a comprehensive view of plant systems, by employing a holistic approach integrating the molecular data at various hierarchical levels. In this review, we discuss the basics of systems biology including the various 'omics' approaches and their integration, the modeling aspects and the tools needed for the plant systems research. A particular emphasis is given to the recent analytical advances, updated published examples of plant systems biology studies and the future trends.
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Affiliation(s)
- Bhavisha P Sheth
- Department of Biosciences, Centre for Advanced Studies in Plant Biotechnology and Genetic Engineering, Saurashtra University, Rajkot, 360005, Gujarat, India,
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31
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Abo-Ogiala A, Carsjens C, Diekmann H, Fayyaz P, Herrfurth C, Feussner I, Polle A. Temperature-induced lipocalin (TIL) is translocated under salt stress and protects chloroplasts from ion toxicity. JOURNAL OF PLANT PHYSIOLOGY 2014; 171:250-9. [PMID: 24028869 DOI: 10.1016/j.jplph.2013.08.003] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/22/2013] [Revised: 08/08/2013] [Accepted: 08/09/2013] [Indexed: 05/08/2023]
Abstract
Temperature-induced lipocalins (TIL) have been invoked in the defense from heat, cold and oxidative stress. Here we document a function of TIL for basal protection from salinity stress. Heterologous expression of TIL from the salt resistant poplar Populus euphratica did not rescue growth but prevented chlorophyll b destruction in salt-exposed Arabidopsis thaliana. The protein was localized to the plasma membrane but was re-translocated to the symplast under salt stress. The A. thaliana knock out and knock down lines Attil1-1 and Attil1-2 showed stronger stress symptoms and stronger chlorophyll b degradation than the wildtype (WT) under excess salinity. They accumulated more chloride and sodium in chloroplasts than the WT. Chloroplast chloride accumulation was found even in the absence of salt stress. Since lipocalins are known to bind regulatory fatty acids of channel proteins as well as iron, we suggest that the salt-induced trafficking of TIL may be required for protection of chloroplasts by affecting ion homeostasis.
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Affiliation(s)
- Atef Abo-Ogiala
- Forest Botany and Tree Physiology, Büsgen-Institute, Georg-August University Göttingen, Büsgenweg 2, 37077 Göttingen, Germany
| | - Caroline Carsjens
- Forest Botany and Tree Physiology, Büsgen-Institute, Georg-August University Göttingen, Büsgenweg 2, 37077 Göttingen, Germany
| | - Heike Diekmann
- Forest Botany and Tree Physiology, Büsgen-Institute, Georg-August University Göttingen, Büsgenweg 2, 37077 Göttingen, Germany
| | - Payam Fayyaz
- Forest Botany and Tree Physiology, Büsgen-Institute, Georg-August University Göttingen, Büsgenweg 2, 37077 Göttingen, Germany
| | - Cornelia Herrfurth
- Plant Biochemistry, Albrecht-von-Haller-Institute for Plant Science, Justus-von-Liebig-Weg 11, Georg-August University Göttingen, 37077 Göttingen, Germany
| | - Ivo Feussner
- Plant Biochemistry, Albrecht-von-Haller-Institute for Plant Science, Justus-von-Liebig-Weg 11, Georg-August University Göttingen, 37077 Göttingen, Germany
| | - Andrea Polle
- Forest Botany and Tree Physiology, Büsgen-Institute, Georg-August University Göttingen, Büsgenweg 2, 37077 Göttingen, Germany.
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Huda KMK, Banu MSA, Garg B, Tula S, Tuteja R, Tuteja N. OsACA6, a P-type IIB Ca²⁺ ATPase promotes salinity and drought stress tolerance in tobacco by ROS scavenging and enhancing the expression of stress-responsive genes. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2013; 76:997-1015. [PMID: 24128296 DOI: 10.1111/tpj.12352] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2013] [Revised: 09/30/2013] [Accepted: 10/08/2013] [Indexed: 05/19/2023]
Abstract
Calcium (Ca²⁺) regulates several signalling pathways involved in growth, development and stress tolerance. Cellular Ca²⁺ homeostasis is achieved by the combined action of channels, pumps and antiporters, but direct evidence for a role of Ca²⁺ATPase pumps in stress tolerance is lacking. Here we report the characterization of a Ca²⁺ ATPase gene (OsACA6) from Oryza sativa, and elucidate its functions in stress tolerance. OsACA6 transcript levels are enhanced in response to salt, drought, abscisic acid and heat. In vivo localization identified plasma membranes as an integration site for the OsACA6-GFP fusion protein. Using transgenic tobacco lines, we demonstrate that over-expression of OsACA6 is triggered during salinity and drought stresses. The enhanced tolerance to these stresses was confirmed by changes in several physiological indices, including water loss rate, photosynthetic efficiency, cell membrane stability, germination, survival rate, malondialdehyde content, electrolyte leakage and increased proline accumulation. Furthermore, over-expressing lines also showed higher leaf chlorophyll and reduced accumulation of H₂O₂ and Na⁺ ions compared to the wild-type. Reduced accumulation of reactive oxygen species (ROS) was observed in transgenic lines. The increased proline accumulation and ROS scavenging enzyme activities in transgenic plants over-expressing OsACA6 efficiently modulate the ROS machinery and proline biosynthesis through an integrative mechanism. Transcriptional profiling of these plants revealed altered expression of genes encoding many transcription factors, stress- and disease-related proteins, as well as signalling components. These results suggest that Ca²⁺ ATPases have diverse roles as regulators of many stress signalling pathways, leading to plant growth, development and stress tolerance.
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Affiliation(s)
- Kazi M K Huda
- International Centre for Genetic Engineering and Biotechnology, Aruna Asaf Ali Marg, New Delhi, 110067, India
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Delporte F, Muhovski Y, Pretova A, Watillon B. Analysis of expression profiles of selected genes associated with the regenerative property and the receptivity to gene transfer during somatic embryogenesis in Triticum aestivum L. Mol Biol Rep 2013; 40:5883-906. [PMID: 24078158 PMCID: PMC3825128 DOI: 10.1007/s11033-013-2696-y] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2013] [Accepted: 09/14/2013] [Indexed: 12/26/2022]
Abstract
The physiological, biochemical and molecular mechanisms regulating the initiation of a regenerative pathway remain partially unknown. Efforts to identify the biological features that confer transformation ability, or the tendency of some cells to induce transgene silencing, would help to improve plant genetic engineering. The objective of our study was to monitor the evolution of plant cell competencies in relation to both in vitro tissue culture regeneration and the genetic transformation properties. We used a simple wheat regeneration procedure as an experimental model for studying the regenerative capacity of plant cells and their receptivity to direct gene transfer over the successive steps of the regenerative pathway. Target gene profiling studies and biochemical assays were conducted to follow some of the mechanisms triggered during the somatic-to-embryogenic transition (i.e. dedifferentiation, cell division activation, redifferentiation) and affecting the accessibility of plant cells to receive and stably express the exogenous DNA introduced by bombardment. Our results seem to indicate that the control of cell-cycle (S-phase) and host defense strategies can be crucial determinants of genetic transformation efficiency. The results from studies conducted at macro-, micro- and molecular scales are then integrated into a holistic approach that addresses the question of tissue culture and transgenesis competencies more broadly. Through this multilevel analysis we try to establish functional links between both regenerative capacity and transformation receptiveness, and thereby to provide a more global and integrated vision of both processes, at the core of defense/adaptive mechanisms and survival, between undifferentiated cell proliferation and organization.
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Affiliation(s)
- Fabienne Delporte
- Department of Life Sciences, Bioengineering Unit, Walloon Agricultural Research Centre (CRAw), Chaussée de Charleroi 234, 5030 Gembloux, Belgium
| | - Yordan Muhovski
- Department of Life Sciences, Bioengineering Unit, Walloon Agricultural Research Centre (CRAw), Chaussée de Charleroi 234, 5030 Gembloux, Belgium
| | - Anna Pretova
- Institute of Plant Genetics and Biotechnology, Slovak Academy of Sciences, Akademicka 2, P.O. Box 39 A, 950 07 Nitra, Slovakia
| | - Bernard Watillon
- Department of Life Sciences, Bioengineering Unit, Walloon Agricultural Research Centre (CRAw), Chaussée de Charleroi 234, 5030 Gembloux, Belgium
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Wong CE, Singh MB, Bhalla PL. The dynamics of soybean leaf and shoot apical meristem transcriptome undergoing floral initiation process. PLoS One 2013; 8:e65319. [PMID: 23762343 PMCID: PMC3675103 DOI: 10.1371/journal.pone.0065319] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2012] [Accepted: 04/24/2013] [Indexed: 11/18/2022] Open
Abstract
Flowering process governs seed set and thus affects agricultural productivity. Soybean, a major legume crop, requires short-day photoperiod conditions for flowering. While leaf-derived signal(s) are essential for the photoperiod-induced floral initiation process at the shoot apical meristem, molecular events associated with early floral transition stages in either leaves or shoot apical meristems are not well understood. To provide novel insights into the molecular basis of floral initiation, RNA-Seq was used to characterize the soybean transcriptome of leaf and micro-dissected shoot apical meristem at different time points after short-day treatment. Shoot apical meristem expressed a higher number of transcripts in comparison to that of leaf highlighting greater diversity and abundance of transcripts expressed in the shoot apical meristem. A total of 2951 shoot apical meristem and 13,609 leaf sequences with significant profile changes during the time course examined were identified. Most changes in mRNA level occurred after 1short-day treatment. Transcripts involved in mediating responses to stimulus including hormones or in various metabolic processes represent the top enriched GO functional category for the SAM and leaf dataset, respectively. Transcripts associated with protein degradation were also significantly changing in leaf and SAM implicating their involvement in triggering the developmental switch. RNA-Seq analysis of shoot apical meristem and leaf from soybean undergoing floral transition reveal major reprogramming events in leaves and the SAM that point toward hormones gibberellins (GA) and cytokinin as key regulators in the production of systemic flowering signal(s) in leaves. These hormones may form part of the systemic signals in addition to the established florigen, FLOWERING LOCUS T (FT). Further, evidence is emerging that the conversion of shoot apical meristem to inflorescence meristem is linked with the interplay of auxin, cytokinin and GA creating a low cytokinin and high GA environment.
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Affiliation(s)
- Chui E. Wong
- Plant Molecular Biology and Biotechnology Group, ARC Centre of Excellence for Integrative Legume Research, Melbourne School of Land and Environment, The University of Melbourne, Parkville, Victoria, Australia
| | - Mohan B. Singh
- Plant Molecular Biology and Biotechnology Group, ARC Centre of Excellence for Integrative Legume Research, Melbourne School of Land and Environment, The University of Melbourne, Parkville, Victoria, Australia
| | - Prem L. Bhalla
- Plant Molecular Biology and Biotechnology Group, ARC Centre of Excellence for Integrative Legume Research, Melbourne School of Land and Environment, The University of Melbourne, Parkville, Victoria, Australia
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Li MW, Qi X, Ni M, Lam HM. Silicon era of carbon-based life: application of genomics and bioinformatics in crop stress research. Int J Mol Sci 2013; 14:11444-83. [PMID: 23759993 PMCID: PMC3709742 DOI: 10.3390/ijms140611444] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2013] [Revised: 05/07/2013] [Accepted: 05/17/2013] [Indexed: 01/25/2023] Open
Abstract
Abiotic and biotic stresses lead to massive reprogramming of different life processes and are the major limiting factors hampering crop productivity. Omics-based research platforms allow for a holistic and comprehensive survey on crop stress responses and hence may bring forth better crop improvement strategies. Since high-throughput approaches generate considerable amounts of data, bioinformatics tools will play an essential role in storing, retrieving, sharing, processing, and analyzing them. Genomic and functional genomic studies in crops still lag far behind similar studies in humans and other animals. In this review, we summarize some useful genomics and bioinformatics resources available to crop scientists. In addition, we also discuss the major challenges and advancements in the "-omics" studies, with an emphasis on their possible impacts on crop stress research and crop improvement.
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Affiliation(s)
- Man-Wah Li
- Center for Soybean Research, State Key Laboratory of Agrobiotechnology and School of Life Sciences, the Chinese University of Hong Kong, Shatin, N.T., Hong Kong; E-Mails: (M.-W.L.); (X.Q.); (M.N.)
| | - Xinpeng Qi
- Center for Soybean Research, State Key Laboratory of Agrobiotechnology and School of Life Sciences, the Chinese University of Hong Kong, Shatin, N.T., Hong Kong; E-Mails: (M.-W.L.); (X.Q.); (M.N.)
| | - Meng Ni
- Center for Soybean Research, State Key Laboratory of Agrobiotechnology and School of Life Sciences, the Chinese University of Hong Kong, Shatin, N.T., Hong Kong; E-Mails: (M.-W.L.); (X.Q.); (M.N.)
| | - Hon-Ming Lam
- Center for Soybean Research, State Key Laboratory of Agrobiotechnology and School of Life Sciences, the Chinese University of Hong Kong, Shatin, N.T., Hong Kong; E-Mails: (M.-W.L.); (X.Q.); (M.N.)
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Choi SW, Tamaki T, Ebine K, Uemura T, Ueda T, Nakano A. RABA members act in distinct steps of subcellular trafficking of the FLAGELLIN SENSING2 receptor. THE PLANT CELL 2013; 25:1174-87. [PMID: 23532067 PMCID: PMC3634684 DOI: 10.1105/tpc.112.108803] [Citation(s) in RCA: 104] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2012] [Revised: 02/26/2013] [Accepted: 03/14/2013] [Indexed: 05/18/2023]
Abstract
Cell surface proteins play critical roles in the perception of environmental stimuli at the plasma membrane (PM) and ensuing signal transduction. Intracellular localization of such proteins must be strictly regulated, which requires elaborate integration of exocytic and endocytic trafficking pathways. Subcellular localization of Arabidopsis thaliana FLAGELLIN SENSING2 (FLS2), a receptor that recognizes bacterial flagellin, also depends on membrane trafficking. However, our understanding about the mechanisms involved is still limited. In this study, we visualized ligand-induced endocytosis of FLS2 using green fluorescent protein (GFP)-tagged FLS2 expressed in Nicotiana benthamiana. Upon treatment with the flg22 peptide, internalized FLS2-GFP from the PM was transported to a compartment with properties intermediate between the trans-Golgi network (TGN) and the multivesicular endosome. This compartment gradually discarded the TGN characteristics as it continued along the trafficking pathway. We further found that FLS2 endocytosis involves distinct RABA/RAB11 subgroups at different steps. Moreover, we demonstrated that transport of de novo-synthesized FLS2 to the PM also involves a distinct RABA/RAB11 subgroup. Our results demonstrate the complex regulatory system for properly localizing FLS2 and functional differentiation in RABA members in endo- and exocytosis.
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Affiliation(s)
- Seung-won Choi
- Department of Biological Sciences, Graduate School of Science, University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Takayuki Tamaki
- Department of Biological Sciences, Graduate School of Science, University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Kazuo Ebine
- Department of Biological Sciences, Graduate School of Science, University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Tomohiro Uemura
- Department of Biological Sciences, Graduate School of Science, University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Takashi Ueda
- Department of Biological Sciences, Graduate School of Science, University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan
- Japan Science and Technology Agency, PRESTO, Saitama 332-0012, Japan
| | - Akihiko Nakano
- Department of Biological Sciences, Graduate School of Science, University of Tokyo, Bunkyo-ku, Tokyo 113-0033, Japan
- Molecular Membrane Biology Laboratory, RIKEN Advanced Science Institute, Wako, Saitama 351-0198, Japan
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Sharma R, De Vleesschauwer D, Sharma MK, Ronald PC. Recent advances in dissecting stress-regulatory crosstalk in rice. MOLECULAR PLANT 2013; 6:250-60. [PMID: 23292878 DOI: 10.1093/mp/sss147] [Citation(s) in RCA: 102] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Biotic and abiotic stresses impose a serious limitation on crop productivity worldwide. Prior or simultaneous exposure to one type of stress often affects the plant response to other stresses, indicating extensive overlap and crosstalk between stress-response signaling pathways. Systems biology approaches that integrate large genomic and proteomic data sets have facilitated identification of candidate genes that govern this stress-regulatory crosstalk. Recently, we constructed a yeast two-hybrid map around three rice proteins that control the response to biotic and abiotic stresses, namely the immune receptor XA21, which confers resistance to the Gram-negative bacterium, Xanthomonas oryzae pv. oryzae; NH1, the rice ortholog of NPR1, a key regulator of systemic acquired resistance; and the ethylene-responsive transcription factor, SUB1A, which confers tolerance to submergence stress. These studies coupled with transcriptional profiling and co-expression analyses identified a suite of proteins that are positioned at the interface of biotic and abiotic stress responses, including mitogen-activated protein kinase 5 (OsMPK5), wall-associated kinase 25 (WAK25), sucrose non-fermenting-1-related protein kinase-1 (SnRK1), SUB1A binding protein 23 (SAB23), and several WRKY family transcription factors. Emerging evidence suggests that these genes orchestrate crosstalk between biotic and abiotic stresses through a variety of mechanisms, including regulation of cellular energy homeostasis and modification of synergistic and/or antagonistic interactions between the stress hormones salicylic acid, ethylene, jasmonic acid, and abscisic acid.
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Affiliation(s)
- Rita Sharma
- Department of Plant Pathology and Genome Center, University of California, Davis, CA 95616, USA
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Zhang Z, Li H, Zhang D, Liu Y, Fu J, Shi Y, Song Y, Wang T, Li Y. Characterization and expression analysis of six MADS-box genes in maize (Zea mays L.). JOURNAL OF PLANT PHYSIOLOGY 2012; 169:797-806. [PMID: 22440334 DOI: 10.1016/j.jplph.2011.12.020] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2011] [Revised: 12/29/2011] [Accepted: 12/29/2011] [Indexed: 05/19/2023]
Abstract
MADS-box genes encode a family of transcription factors, which control diverse developmental processes in flowering plants, with organs ranging from roots, flowers and fruits. In this study, six maize cDNAs encoding MADS-box proteins were isolated. BLASTX searches and phylogenetic analysis indicated that the six MADS-box genes belonging to the AGL2-like clade. qRT-PCR analysis revealed that these genes had differential expression patterns in different organs in maize. The results of yeast one-hybrid system indicated that the protein ZMM3-1, ZMM3-2, ZMM6, ZMM7-L, ZMM8-L and ZMM14-L had transcriptional activation activity. Subcellular localization of ZMM7-L demonstrated that the fluorescence of ZMM7-L-GFP was mainly detected in the nuclei of onion epidermal cells. qRT-PCR analysis for expression pattern of ZMM7-L showed that the gene was up-regulated by abiotic stresses and down-regulated by exogenous ABA. The germination rates of over-expression transgenic lines were lower than that of the wild type on medium with 150 mM NaCl, 350 mM mannitol. These results indicated that ZMM7-L might be a negative transcription factor responsive to abiotic stresses.
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Affiliation(s)
- Zhongbao Zhang
- Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing 100081, PR China
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Abstract
The study of protein-protein interactions (PPIs) is essential to uncover unknown functions of proteins at the molecular level and to gain insight into complex cellular networks. Affinity purification and mass spectrometry (AP-MS), yeast two-hybrid, imaging approaches and numerous diverse databases have been developed as strategies to analyze PPIs. The past decade has seen an increase in the number of identified proteins with the development of MS and large-scale proteome analyses. Consequently, the false-positive protein identification rate has also increased. Therefore, the general consensus is to confirm PPI data using one or more independent approaches for an accurate evaluation. Furthermore, identifying minor PPIs is fundamental for understanding the functions of transient interactions and low-abundance proteins. Besides establishing PPI methodologies, we are now seeing the development of new methods and/or improvements in existing methods, which involve identifying minor proteins by MS, multidimensional protein identification technology or OFFGEL electrophoresis analyses, one-shot analysis with a long column or filter-aided sample preparation methods. These advanced techniques should allow thousands of proteins to be identified, whereas in-depth proteomic methods should permit the identification of transient binding or PPIs with weak affinity. Here, the current status of PPI analysis is reviewed and some advanced techniques are discussed briefly along with future challenges for plant proteomics.
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Affiliation(s)
- Yoichiro Fukao
- Plant Global Educational Project, Nara Institute of Science and Technology, Ikoma, Japan
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40
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Jogaiah S, Govind SR, Tran LSP. Systems biology-based approaches toward understanding drought tolerance in food crops. Crit Rev Biotechnol 2012; 33:23-39. [PMID: 22364373 DOI: 10.3109/07388551.2012.659174] [Citation(s) in RCA: 85] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Economically important crops, such as maize, wheat, rice, barley, and other food crops are affected by even small changes in water potential at important growth stages. Developing a comprehensive understanding of host response to drought requires a global view of the complex mechanisms involved. Research on drought tolerance has generally been conducted using discipline-specific approaches. However, plant stress response is complex and interlinked to a point where discipline-specific approaches do not give a complete global analysis of all the interlinked mechanisms. Systems biology perspective is needed to understand genome-scale networks required for building long-lasting drought resistance. Network maps have been constructed by integrating multiple functional genomics data with both model plants, such as Arabidopsis thaliana, Lotus japonicus, and Medicago truncatula, and various food crops, such as rice and soybean. Useful functional genomics data have been obtained from genome-wide comparative transcriptome and proteome analyses of drought responses from different crops. This integrative approach used by many groups has led to identification of commonly regulated signaling pathways and genes following exposure to drought. Combination of functional genomics and systems biology is very useful for comparative analysis of other food crops and has the ability to develop stable food systems worldwide. In addition, studying desiccation tolerance in resurrection plants will unravel how combination of molecular genetic and metabolic processes interacts to produce a resurrection phenotype. Systems biology-based approaches have helped in understanding how these individual factors and mechanisms (biochemical, molecular, and metabolic) "interact" spatially and temporally. Signaling network maps of such interactions are needed that can be used to design better engineering strategies for improving drought tolerance of important crop species.
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Affiliation(s)
- Sudisha Jogaiah
- Downy Mildew Research Laboratory, Department of Studies in Biotechnology, University of Mysore, Mysore, Karnataka, India
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Sehgal D, Rajaram V, Armstead IP, Vadez V, Yadav YP, Hash CT, Yadav RS. Integration of gene-based markers in a pearl millet genetic map for identification of candidate genes underlying drought tolerance quantitative trait loci. BMC PLANT BIOLOGY 2012; 12:9. [PMID: 22251627 PMCID: PMC3287966 DOI: 10.1186/1471-2229-12-9] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2011] [Accepted: 01/17/2012] [Indexed: 05/21/2023]
Abstract
BACKGROUND Identification of genes underlying drought tolerance (DT) quantitative trait loci (QTLs) will facilitate understanding of molecular mechanisms of drought tolerance, and also will accelerate genetic improvement of pearl millet through marker-assisted selection. We report a map based on genes with assigned functional roles in plant adaptation to drought and other abiotic stresses and demonstrate its use in identifying candidate genes underlying a major DT-QTL. RESULTS Seventy five single nucleotide polymorphism (SNP) and conserved intron spanning primer (CISP) markers were developed from available expressed sequence tags (ESTs) using four genotypes, H 77/833-2, PRLT 2/89-33, ICMR 01029 and ICMR 01004, representing parents of two mapping populations. A total of 228 SNPs were obtained from 30.5 kb sequenced region resulting in a SNP frequency of 1/134 bp. The positions of major pearl millet linkage group (LG) 2 DT-QTLs (reported from crosses H 77/833-2 × PRLT 2/89-33 and 841B × 863B) were added to the present consensus function map which identified 18 genes, coding for PSI reaction center subunit III, PHYC, actin, alanine glyoxylate aminotransferase, uridylate kinase, acyl-CoA oxidase, dipeptidyl peptidase IV, MADS-box, serine/threonine protein kinase, ubiquitin conjugating enzyme, zinc finger C- × 8-C × 5-C × 3-H type, Hd3, acetyl CoA carboxylase, chlorophyll a/b binding protein, photolyase, protein phosphatase1 regulatory subunit SDS22 and two hypothetical proteins, co-mapping in this DT-QTL interval. Many of these candidate genes were found to have significant association with QTLs of grain yield, flowering time and leaf rolling under drought stress conditions. CONCLUSIONS We have exploited available pearl millet EST sequences to generate a mapped resource of seventy five new gene-based markers for pearl millet and demonstrated its use in identifying candidate genes underlying a major DT-QTL in this species. The reported gene-based markers represent an important resource for identification of candidate genes for other mapped abiotic stress QTLs in pearl millet. They also provide a resource for initiating association studies using candidate genes and also for comparing the structure and function of distantly related plant genomes such as other Poaceae members.
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Affiliation(s)
- Deepmala Sehgal
- Institute of Biological, Environmental and Rural Sciences (IBERS), Aberystwyth University, Gogerddan, Aberystwyth, Ceredigion SY23 3 EB, UK
| | - Vengaldas Rajaram
- International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), ICRISAT-Patencheru, Hyderabad 502 324, Andhra Pradesh, India
| | - Ian Peter Armstead
- Institute of Biological, Environmental and Rural Sciences (IBERS), Aberystwyth University, Gogerddan, Aberystwyth, Ceredigion SY23 3 EB, UK
| | - Vincent Vadez
- International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), ICRISAT-Patencheru, Hyderabad 502 324, Andhra Pradesh, India
| | - Yash Pal Yadav
- Chaudhary Charan Singh Haryana Agricultural University (CCSHAU), Bawal 123 501, Haryana, India
| | - Charles Thomas Hash
- International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), ICRISAT-Patencheru, Hyderabad 502 324, Andhra Pradesh, India
| | - Rattan Singh Yadav
- Institute of Biological, Environmental and Rural Sciences (IBERS), Aberystwyth University, Gogerddan, Aberystwyth, Ceredigion SY23 3 EB, UK
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Khurana N, Chauhan H, Khurana P. Expression analysis of a heat-inducible, Myo-inositol-1-phosphate synthase (MIPS) gene from wheat and the alternatively spliced variants of rice and Arabidopsis. PLANT CELL REPORTS 2012; 31:237-51. [PMID: 21971746 DOI: 10.1007/s00299-011-1160-5] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2011] [Revised: 08/30/2011] [Accepted: 09/21/2011] [Indexed: 05/08/2023]
Abstract
Molecular dissection and a deeper analysis of the heat stress response mechanism in wheat have been poorly understood so far. This study delves into the molecular basis of action of TaMIPS, a heat stress-inducible enzyme that was identified through PCR-select subtraction technology, which is named here as TaMIPS2. MIPS (L-Myo-inositol-phosphate synthase) is important for the normal growth and development in plants. Expression profiling showed that TaMIPS2 is expressed during different developing seed stages upon heat stress. Also, the transcript levels increase in unfertilized ovaries and significant amounts are present during the recovery period providing evidence that MIPS is crucial for its role in heat stress recovery and flower development. Alternatively spliced forms from rice and Arabidopsis were also identified and their expression analysis revealed that apart from heat stress, some of the spliced variants were also inducible by drought, NaCl, Cold, ABA, BR, SA and mannitol. In silico promoter analysis revealed various cis-elements that could contribute for the differential regulation of MIPS in different plant systems. Phylogenetic analysis indicated that MIPS are highly conserved among monocots and dicots and TaMIPS2 grouped specifically with monocots. Comparative analyses was undertaken by different experimental approaches, i.e., semi-quantitative RT-PCR, quantitative RT-PCR, Genevestigator as a reference expression tool and motif analysis to predict the possible function of TaMIPS2 in regulating the different aspects of plant development under abiotic stress in wheat.
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Affiliation(s)
- Neetika Khurana
- Department of Plant Molecular Biology, University of Delhi, New Delhi, India
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43
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Khalil HB, Wang Z, Wright JA, Ralevski A, Donayo AO, Gulick PJ. Heterotrimeric Gα subunit from wheat (Triticum aestivum), GA3, interacts with the calcium-binding protein, Clo3, and the phosphoinositide-specific phospholipase C, PI-PLC1. PLANT MOLECULAR BIOLOGY 2011; 77:145-158. [PMID: 21725861 DOI: 10.1007/s11103-011-9801-1] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2010] [Accepted: 06/04/2011] [Indexed: 05/31/2023]
Abstract
The canonical Gα subunit of the heterotrimeric G protein complex from wheat (Triticum aestivum), GA3, and the calcium-binding protein, Clo3, were revealed to interact both in vivo and in vitro and Clo3 was shown to enhance the GTPase activity of GA3. Clo3 is a member of the caleosin gene family in wheat with a single EF-hand domain and is induced during cold acclimation. Bimolecular Fluorescent Complementation (BiFC) was used to localize the interaction between Clo3 and GA3 to the plasma membrane (PM). Even though heterotrimeric G-protein signaling and Ca²⁺ signaling have both been shown to play a role in the response to environmental stresses in plants, little is known about the interaction between calcium-binding proteins and Gα. The GAP activity of Clo3 towards GA3 suggests it may play a role in the inactivation of GA3 as part of the stress response in plants. GA3 was also shown to interact with the phosphoinositide-specific phospholipase C, PI-PLC1, not only in the PM but also in the endoplasmic reticulum (ER). Surprisingly, Clo3 was also shown to interact with PI-PLC1 in the PM and ER. In vitro analysis of the protein-protein interaction showed that the interaction of Clo3 with GA3 and PI-PLC1 is enhanced by high Ca²⁺ levels. Three-way affinity characterizations with GA3, Clo3 and PI-PLC1 showed the interaction with Clo3 to be competitive, which suggests that Clo3 may play a role in the Ca²⁺-triggered feedback regulation of both GA3 and PI-PLC1. This hypothesis was further supported by the demonstration that Clo3 has GAP activity with GA3.
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Affiliation(s)
- Hala Badr Khalil
- Department of Biology, Concordia University, 7141 Sherbrooke W., Montreal, QC H4B1R6, Canada
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Kosová K, Vítámvás P, Prášil IT, Renaut J. Plant proteome changes under abiotic stress — Contribution of proteomics studies to understanding plant stress response. J Proteomics 2011; 74:1301-22. [DOI: 10.1016/j.jprot.2011.02.006] [Citation(s) in RCA: 567] [Impact Index Per Article: 43.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2010] [Revised: 02/01/2011] [Accepted: 02/02/2011] [Indexed: 01/01/2023]
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45
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Zhang Y, Gao P, Yuan JS. Plant protein-protein interaction network and interactome. Curr Genomics 2011; 11:40-6. [PMID: 20808522 PMCID: PMC2851115 DOI: 10.2174/138920210790218016] [Citation(s) in RCA: 76] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2009] [Revised: 07/30/2009] [Accepted: 07/30/2009] [Indexed: 11/22/2022] Open
Abstract
Protein-protein interaction network represents an important aspect of systems biology. The understanding of the plant protein-protein interaction network and interactome will provide crucial insights into the regulation of plant developmental, physiological, and pathological processes. In this review, we will first define the concept of plant interactome and the protein-protein interaction network. The significance of the plant interactome study will be discussed. We will then compare the pros and cons for different strategies for interactome mapping including yeast two-hybrid system (Y2H), affinity purification mass spectrometry (AP-MS), bimolecular fluorescence complementation (BiFC), and in silico prediction. The application of these platforms on specific plant biology questions will be further discussed. The recent advancements revealed the great potential for plant protein-protein interaction network and interactome to elucidate molecular mechanisms for signal transduction, stress responses, cell cycle control, pattern formation, and others. Mapping the plant interactome in model species will provide important guideline for the future study of plant biology.
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Affiliation(s)
- Yixiang Zhang
- Department of Plant Pathology and Microbiology, Texas A&M University, College Station, TX 77843, USA
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46
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Alpha-tubulin (CsTUA) up-regulated during winter dormancy is a low temperature inducible gene in tea [Camellia sinensis (L.) O. Kuntze]. Mol Biol Rep 2011; 39:3485-90. [PMID: 21725638 DOI: 10.1007/s11033-011-1121-7] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2011] [Accepted: 06/20/2011] [Indexed: 02/07/2023]
Abstract
The present manuscript describes cloning and expression characterization of alpha-tubulin (CsTUA) gene in an evergreen tree tea [Camellia sinensis (L.) O. Kuntze] in response to winter dormancy (WD), abiotic stresses (sodium chloride, polyethylene glycol, and hydrogen peroxide) and plant growth regulators [abscisic acid (ABA), gibberellic acid (GA(3)), indole-3-butyric acid (IBA), and 6-benzylaminopurine (BA)]. CsTUA encoded a putative protein of 449 amino acids with a calculated molecular weight of 49.6 kDa and an isoelectric point (pI) of 5.09. CsTUA shared 76-84 and 90-95% identity at nucleotide and amino acid level, respectively with TUA genes from other plant species. During the period of active growth (PAG), CsTUA showed maximum expression in floral buds as compared to leaf, stem, fruit and root. Though the transcript was not detectable in the younger leaf tissue during the PAG, the expression was induced within 24 h of the low temperature (LT) treatment. The expression was not modulated by the plant growth regulators either in the tissue harvested during PAG or during WD. It was interesting to record that the expression of CsTUA was up-regulated in response to sodium chloride, polyethylene glycol, and hydrogen peroxide. Data has been discussed on the possible role of CsTUA in imparting tolerance to stresses including to LT so that the tea does not exhibit deciduous nature during winters.
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Remmerie N, De Vijlder T, Laukens K, Dang TH, Lemière F, Mertens I, Valkenborg D, Blust R, Witters E. Next generation functional proteomics in non-model plants: A survey on techniques and applications for the analysis of protein complexes and post-translational modifications. PHYTOCHEMISTRY 2011; 72:1192-218. [PMID: 21345472 DOI: 10.1016/j.phytochem.2011.01.003] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/06/2010] [Revised: 11/21/2010] [Accepted: 01/03/2011] [Indexed: 05/11/2023]
Abstract
The congruent development of computational technology, bioinformatics and analytical instrumentation makes proteomics ready for the next leap. Present-day state of the art proteomics grew from a descriptive method towards a full stake holder in systems biology. High throughput and genome wide studies are now made at the functional level. These include quantitative aspects, functional aspects with respect to protein interactions as well as post translational modifications and advanced computational methods that aid in predicting protein function and mapping these functionalities across the species border. In this review an overview is given of the current status of these aspects in plant studies with special attention to non-genomic model plants.
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Affiliation(s)
- Noor Remmerie
- Center for Proteomics, University of Antwerp, Groenenborgerlaan 171, B-2020 Antwerp, Belgium
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48
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Reddy ASN, Ali GS, Celesnik H, Day IS. Coping with stresses: roles of calcium- and calcium/calmodulin-regulated gene expression. THE PLANT CELL 2011; 23:2010-32. [PMID: 21642548 PMCID: PMC3159525 DOI: 10.1105/tpc.111.084988] [Citation(s) in RCA: 415] [Impact Index Per Article: 31.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2011] [Revised: 05/02/2011] [Accepted: 05/16/2011] [Indexed: 05/18/2023]
Abstract
Abiotic and biotic stresses are major limiting factors of crop yields and cause billions of dollars of losses annually around the world. It is hoped that understanding at the molecular level how plants respond to adverse conditions and adapt to a changing environment will help in developing plants that can better cope with stresses. Acquisition of stress tolerance requires orchestration of a multitude of biochemical and physiological changes, and most of these depend on changes in gene expression. Research during the last two decades has established that different stresses cause signal-specific changes in cellular Ca(2+) level, which functions as a messenger in modulating diverse physiological processes that are important for stress adaptation. In recent years, many Ca(2+) and Ca(2+)/calmodulin (CaM) binding transcription factors (TFs) have been identified in plants. Functional analyses of some of these TFs indicate that they play key roles in stress signaling pathways. Here, we review recent progress in this area with emphasis on the roles of Ca(2+)- and Ca(2+)/CaM-regulated transcription in stress responses. We will discuss emerging paradigms in the field, highlight the areas that need further investigation, and present some promising novel high-throughput tools to address Ca(2+)-regulated transcriptional networks.
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Affiliation(s)
- Anireddy S N Reddy
- Department of Biology, Program in Molecular Plant Biology, Program in Cell and Molecular Biology, Colorado State University, Fort Collins, Colorado 80523, USA.
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Wu CC, Singh P, Chen MC, Zimmerli L. L-Glutamine inhibits beta-aminobutyric acid-induced stress resistance and priming in Arabidopsis. JOURNAL OF EXPERIMENTAL BOTANY 2010; 61:995-1002. [PMID: 20007686 PMCID: PMC2826644 DOI: 10.1093/jxb/erp363] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2009] [Revised: 11/18/2009] [Accepted: 11/18/2009] [Indexed: 05/18/2023]
Abstract
The non-protein amino acid beta-aminobutyric acid (BABA) enhances Arabidopsis resistance to microbial pathogens and abiotic stresses through potentiation of the Arabidopsis defence responses. In this study, it is shown that BABA induces the stress-induced morphogenic response (SIMR). SIMR is observed in plants exposed to sub-lethal stress conditions. Anthocyanin, a known modulator of stress signalling, was also found to accumulate in BABA-treated Arabidopsis. These data and a previous microarray study indicate that BABA induces a stress response in Arabidopsis. High concentrations of amino acids, except for L-glutamine, cause a general amino acid stress inhibition. General amino acid inhibition is prevented by the addition of L-glutamine. L-Glutamine was found to inhibit the BABA-mediated SIMR and anthocyanin accumulation, suggesting that the non-protein amino acid BABA causes a general amino acid stress inhibition in Arabidopsis. L-Glutamine also blocked BABA-induced resistance to heat stress and to the virulent bacterial pathogen Pseudomonas syringae pv. tomato DC3000. During bacterial infection, priming of the salicylic acid-dependent defence marker PR1 was abolished by L-glutamine treatment. These results indicate that L-glutamine removal of the BABA-mediated stress response is concomitant with L-glutamine inhibition of BABA priming and BABA-induced resistance.
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Affiliation(s)
| | | | | | - Laurent Zimmerli
- Department of Life Science and Institute of Plant Biology, National Taiwan University, Taipei 106, Taiwan
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Identification of DNA-binding proteins and protein-protein interactions by yeast one-hybrid and yeast two-hybrid screen. Methods Mol Biol 2010; 639:171-92. [PMID: 20387046 DOI: 10.1007/978-1-60761-702-0_10] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
The regulation of gene activity is a crucial factor in coordinating development, growth and acclimation to environmental changes. By this means, metabolic processes are adjusted according to cellular needs by changing gene expression patterns. In the genome of the model plant Arabidopsis thaliana, more than 7% of the genes are estimated to encode proteins directly involved in gene regulation. Transcription factors (TFs) are able to bind to specific DNA motifs named cis-elements and control the expression of target genes. The regulation may be either activation, stimulation, inhibition or suppression. The activation of genes is mediated by well-coordinated protein-protein interactions between transcription factors and a various number of cofactors. The gene activation networks are still poorly understood. In order to address the involved protein-DNA and protein-protein interactions, a number of methods have been developed that efficiently address cis-element interacting partners. This chapter describes two powerful methods: the yeast one-hybrid system and the yeast two-hybrid system. In combination these techniques provide the ability to identify cis-element-binding transcription factors and their upstream interaction partners.
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