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Ortiz-Espín A, Iglesias-Fernández R, Calderón A, Carbonero P, Sevilla F, Jiménez A. Mitochondrial AtTrxo1 is transcriptionally regulated by AtbZIP9 and AtAZF2 and affects seed germination under saline conditions. JOURNAL OF EXPERIMENTAL BOTANY 2017; 68:1025-1038. [PMID: 28184497 PMCID: PMC5441863 DOI: 10.1093/jxb/erx012] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
Mitochondrial thioredoxin-o (AtTrxo1) was characterized and its expression examined in different organs of Arabidopsis thaliana. AtTrxo1 transcript levels were particularly high in dry seeds and cotyledons where they reached a maximum 36 h after imbibition with water, coinciding with 50% germination. Expression was lower in seeds germinating in 100 mM NaCl. To gain insight into the transcriptional regulation of the AtTrxo1 gene, a phylogenomic analysis was coupled with the screening of an arrayed library of Arabidopsis transcription factors in yeast. The basic leucine zipper AtbZIP9 and the zinc finger protein AZF2 were identified as putative transcriptional regulators. Transcript regulation of AtbZIP9 and AtAFZ2 during germination was compatible with the proposed role in transcriptional regulation of AtTrxo1. Transient over-expression of AtbZIP9 and AtAZF2 in Nicotiana benthamiana leaves demonstrated an activation effect of AtbZIP9 and a repressor effect of AtAZF2 on AtTrxo1 promoter-driven reporter expression. Although moderate concentrations of salt delayed germination in Arabidopsis wild-type seeds, those of two different AtTrxo1 knock-out mutants germinated faster and accumulated higher H2O2 levels than the wild-type. All these data indicate that AtTrxo1 has a role in redox homeostasis during seed germination under salt conditions.
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Affiliation(s)
- Ana Ortiz-Espín
- Departamento de Biología del Estrés y Patología Vegetal, CEBAS-CSIC, Campus Universitario de Espinardo, 30100-Murcia, Spain
| | - Raquel Iglesias-Fernández
- Centro de Biotecnología y Genómica de Plantas (CBGP; UPM-INIA), Campus de Montegancedo, Universidad Politécnica de Madrid, Pozuelo de Alarcón, 28223-Madrid, Spain
| | - Aingeru Calderón
- Departamento de Biología del Estrés y Patología Vegetal, CEBAS-CSIC, Campus Universitario de Espinardo, 30100-Murcia, Spain
| | - Pilar Carbonero
- Centro de Biotecnología y Genómica de Plantas (CBGP; UPM-INIA), Campus de Montegancedo, Universidad Politécnica de Madrid, Pozuelo de Alarcón, 28223-Madrid, Spain
| | - Francisca Sevilla
- Departamento de Biología del Estrés y Patología Vegetal, CEBAS-CSIC, Campus Universitario de Espinardo, 30100-Murcia, Spain
| | - Ana Jiménez
- Departamento de Biología del Estrés y Patología Vegetal, CEBAS-CSIC, Campus Universitario de Espinardo, 30100-Murcia, Spain
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152
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Li S, Yu X, Cheng Z, Yu X, Ruan M, Li W, Peng M. Global Gene Expression Analysis Reveals Crosstalk between Response Mechanisms to Cold and Drought Stresses in Cassava Seedlings. FRONTIERS IN PLANT SCIENCE 2017; 8:1259. [PMID: 28769962 PMCID: PMC5513928 DOI: 10.3389/fpls.2017.01259] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2017] [Accepted: 07/04/2017] [Indexed: 05/21/2023]
Abstract
Abiotic stress negatively impacts cassava (Manihot esculenta) growth and yield. Several molecular mechanisms of plant response to cold and drought have been identified and described in the literature, however, little is known about the crosstalk of the responses of cassava to these two stresses. To elucidate this question, transcriptome analysis of cassava seedlings under cold or PEG-simulated drought stress treatment was performed. Our results showed that 6103 and 7462 transcripts were significantly regulated by cold and drought stress, respectively. Gene Ontology annotation revealed that the abscisic and jasmonic acid signaling pathways shared between the two stresses responses. We further identified 2434 common differentially expressed genes (DEGs), including 1130 up-regulated and 841 down-regulated DEGs by the two stresses. These co-induced or co-suppressed genes are grouped as stress signal perception and transduction, transcription factors (TFs), metabolism as well as transport facilitation according to the function annotation. Furthermore, a large proportion of well characterized protein kinases, TF families and ubiquitin proteasome system related genes, such as RLKs, MAPKs, AP2/ERFBPs, WRKYs, MYBs, E2 enzymes and E3 ligases, including three complexes of interacting proteins were shown as key points of crosstalk between cold and drought stress signaling transduction pathways in a hierarchical manner. Our research provides valuable information and new insights for genetically improving the tolerance of crops to multiple abiotic stresses.
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Affiliation(s)
- Shuxia Li
- Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural SciencesHaikou, China
| | - Xiang Yu
- National Key Laboratory of Plant Molecular Genetics and National Center of Plant Gene Research, Institute of Plant Physiology and Ecology, Shanghai Institutes for Biological Sciences, Chinese Academy of SciencesShanghai, China
| | - Zhihao Cheng
- Haikou Experimental Station, Chinese Academy of Tropical Agricultural SciencesHaikou, China
| | - Xiaoling Yu
- Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural SciencesHaikou, China
| | - Mengbin Ruan
- Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural SciencesHaikou, China
| | - Wenbin Li
- Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural SciencesHaikou, China
| | - Ming Peng
- Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural SciencesHaikou, China
- *Correspondence: Ming Peng,
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153
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Wu X, Qiao Z, Liu H, Acharya BR, Li C, Zhang W. CML20, an Arabidopsis Calmodulin-like Protein, Negatively Regulates Guard Cell ABA Signaling and Drought Stress Tolerance. FRONTIERS IN PLANT SCIENCE 2017; 8:824. [PMID: 28603528 PMCID: PMC5445667 DOI: 10.3389/fpls.2017.00824] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2017] [Accepted: 05/02/2017] [Indexed: 05/19/2023]
Abstract
Guard cells shrink in response to drought and abscisic acid (ABA), which is caused by efflux of ions that in turn reduces stomatal aperture and improves the plant's ability to retain moisture. Cytosolic free calcium is an essential secondary messenger in guard cell ABA signaling, but the details of this regulatory pathway remain sketchy. Here, the calmodulin-like protein CML20, which has four EF-hand domains and calcium-binding activity in vitro, was found to be a negative regulator of ABA-induced stomatal movement in Arabidopsis. The guard cells of cml20 loss-of-function mutant plants were hypersensitive to both ABA-activated S-type anion currents, and ABA inhibited inward K+ currents than those of wild type. Additional, due to smaller stomatal aperture, cml20 showed less water loss from the leaves than wild type. These phenotypes of CML20 overexpressing plants contrasted with wild type in the opposite direction. In the cml20 mutant, the transcripts of stress responsive genes, such as MYB2, RAB18, ERD10, COR47, and RD29A were up-regulated in response to drought and ABA, while down-regulated of APX2 transcription and higher reactive oxygen species (ROS) accumulation. These observations support the CML20, a functional Ca2+ sensor, is a negative regulator in guard cell ABA signaling.
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Affiliation(s)
- Xiaomeng Wu
- Key Laboratory of Plant Cell Engineering and Germplasm Innovation, Ministry of Education, School of Life Science, Shandong UniversityJinan, China
| | - Zhu Qiao
- Key Laboratory of Plant Cell Engineering and Germplasm Innovation, Ministry of Education, School of Life Science, Shandong UniversityJinan, China
| | - Huiping Liu
- Key Laboratory of Plant Cell Engineering and Germplasm Innovation, Ministry of Education, School of Life Science, Shandong UniversityJinan, China
| | - Biswa R. Acharya
- Donald Danforth Plant Science Center, St. LouisMO, United States
| | - Chunlong Li
- College of Life Science, Jiangsu Normal UniversityXuzhou, China
- *Correspondence: Chunlong Li, Wei Zhang,
| | - Wei Zhang
- Key Laboratory of Plant Cell Engineering and Germplasm Innovation, Ministry of Education, School of Life Science, Shandong UniversityJinan, China
- *Correspondence: Chunlong Li, Wei Zhang,
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154
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Ertani A, Schiavon M, Nardi S. Transcriptome-Wide Identification of Differentially Expressed Genes in Solanum lycopersicon L. in Response to an Alfalfa-Protein Hydrolysate Using Microarrays. FRONTIERS IN PLANT SCIENCE 2017; 8:1159. [PMID: 28725232 PMCID: PMC5496959 DOI: 10.3389/fpls.2017.01159] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2017] [Accepted: 06/16/2017] [Indexed: 05/02/2023]
Abstract
An alfalfa-based protein hydrolysate (EM) has been tested in tomato (Solanum lycopersicon L.) plants at two different concentrations (0.1 and 1 mL L-1) to get insight on its efficacy as biostimulant in this species and to unravel possible metabolic targets and molecular mechanisms that may shed light on its mode of action. EM was efficient in promoting the fresh biomass and content in chlorophyll and soluble sugars of tomato plants, especially when it was applied at the concentration of 1 mL L-1. This effect on plant productivity was likely related to the EM-dependent up-regulation of genes identified via microarray and involved in primary carbon and nitrogen metabolism, photosynthesis, nutrient uptake and developmental processes. EM also up-regulated a number of genes implied in the secondary metabolism that leads to the synthesis of compounds (phenols and terpenes) functioning in plant development and interaction with the environment. Concomitantly, phenol content was enhanced in EM-treated plants. Several new genes have been identified in tomato as potential targets of EM action, like those involved in detoxification processes from reactive oxygen species and xenobiotic (particularly glutathione/ascorbate cycle-related and ABC transporters), and defense against abiotic and biotic stress. The model hypothesized is that elicitors present in the EM formulation like auxins, phenolics, and amino acids, may trigger a signal transduction pathway via modulation of the intracellular levels of the hormones ethylene, jasmonic acid and abscissic acid, which then further prompt the activation of a cascade events requiring the presence and activity of many kinases and transcription factors to activate stress-related genes. The genes identified suggest these kinases and transcription factors as players involved in a complex crosstalk between biotic and abiotic stress signaling pathways. We conclude that EM acts as a biostimulant in tomato due to its capacity to stimulate plant productivity and up-regulate stress-related responses. Its use in agricultural practices may reduce the need of inorganic fertilizers and pesticides, thereby reducing the environmental impact of productive agriculture.
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Affiliation(s)
- Andrea Ertani
- Department of Agronomy, Food, Natural Resources, Animals, and Environment, University of PadovaPadua, Italy
- *Correspondence: Andrea Ertani,
| | - Michela Schiavon
- Department of Agronomy, Food, Natural Resources, Animals, and Environment, University of PadovaPadua, Italy
- Biology Department, Colorado State University, Fort CollinsCO, United States
| | - Serenella Nardi
- Department of Agronomy, Food, Natural Resources, Animals, and Environment, University of PadovaPadua, Italy
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155
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Zhang A, Liu D, Hua C, Yan A, Liu B, Wu M, Liu Y, Huang L, Ali I, Gan Y. The Arabidopsis Gene zinc finger protein 3(ZFP3) Is Involved in Salt Stress and Osmotic Stress Response. PLoS One 2016; 11:e0168367. [PMID: 27977750 PMCID: PMC5158053 DOI: 10.1371/journal.pone.0168367] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2016] [Accepted: 11/30/2016] [Indexed: 11/18/2022] Open
Abstract
Plants are continuously challenged by various abiotic and biotic stresses. To tide over these adversities, plants evolved intricate regulatory networks to adapt these unfavorable environments. So far, many researchers have clarified the molecular and genetic pathways involved in regulation of stress responses. However, the mechanism through which these regulatory networks operate is largely unknown. In this study, we cloned a C2H2-type zinc finger protein gene ZFP3 from Arabidopsis thaliana and investigated its function in salt and osmotic stress response. Our results showed that the expression level of ZFP3 was highly suppressed by NaCl, mannitol and sucrose. Constitutive expression of ZFP3 enhanced tolerance of plants to salt and osmotic stress while the zfp3 mutant plants displays reduced tolerance in Arabidopsis. Gain- and Loss-of-function studies of ZFP3 showed that ZFP3 significantly changes proline accumulation and chlorophyll content. Furthermore, over-expression of ZFP3 induced the expressions of stress-related gene KIN1, RD22, RD29B and AtP5CS1. These results suggest that ZFP3 is involved in salt and osmotic stress response.
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Affiliation(s)
- Aidong Zhang
- Zhejiang Key Lab of Crop Germplasm, Department of Agronomy, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, China
| | - Dongdong Liu
- Zhejiang Key Lab of Crop Germplasm, Department of Agronomy, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, China
| | - Changmei Hua
- Zhejiang Key Lab of Crop Germplasm, Department of Agronomy, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, China
| | - An Yan
- Zhejiang Key Lab of Crop Germplasm, Department of Agronomy, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, China
| | - Bohan Liu
- Zhejiang Key Lab of Crop Germplasm, Department of Agronomy, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, China
| | - Minjie Wu
- Zhejiang Key Lab of Crop Germplasm, Department of Agronomy, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, China
| | - Yihua Liu
- Zhejiang Key Lab of Crop Germplasm, Department of Agronomy, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, China
| | - Linli Huang
- Zhejiang Key Lab of Crop Germplasm, Department of Agronomy, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, China
| | - Imran Ali
- Zhejiang Key Lab of Crop Germplasm, Department of Agronomy, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, China
| | - Yinbo Gan
- Zhejiang Key Lab of Crop Germplasm, Department of Agronomy, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, China
- * E-mail:
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156
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Zhang H, Zhao T, Zhuang P, Song Z, Du H, Tang Z, Gao Z. NbCZF1, a Novel C2H2-Type Zinc Finger Protein, as a New Regulator of SsCut-Induced Plant Immunity in Nicotiana benthamiana. PLANT & CELL PHYSIOLOGY 2016; 57:2472-2484. [PMID: 27649734 DOI: 10.1093/pcp/pcw160] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2016] [Accepted: 09/08/2016] [Indexed: 06/06/2023]
Abstract
SsCut, which functions as an elicitor, can induce plant immunity. In this study, we utilized Nicotiana benthamiana and virus-induced gene silencing to decrease the expression of > 2,500 genes individually. Using this forward genetics approach, several genes were identified that, when silenced, compromised SsCut-triggered cell death based on a cell death assay. A C2H2-type zinc finger gene was isolated from N. benthamiana Sequence analysis indicated that the gene encodes a 27 kDa protein with 253 amino acids containing two typical C2H2-type zinc finger domains; this gene was named NbCZF1 We found that SsCut-induced cell death could be inhibited by virus-induced gene silencing of NbCZF1 in N. benthamiana In addition, SsCut induces stomatal closure, accompanied by reactive oxygen species (ROS) production by NADPH oxidases and nitric oxide (NO) production. NbCZF1-silenced plants showed impaired SsCut-induced stomatal closure, decreased SsCut-induced production of ROS and NO in guard cells and reduced SsCut-induced resistance against Phytophthora nicotianae Taken together, these results demonstrate that the NbCZF1-ROS-NO pathway mediates multiple SsCut-triggered responses, including stomatal closure, hypersensitive responses and defense-related gene expression. This is the first report describing the function of a C2H2-type zinc finger protein in N. benthamiana.
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Affiliation(s)
- Huajian Zhang
- Department of Plant Pathology, College of Plant Protection, Anhui Agricultural University, Hefei, 230036, China
- These authors contributed equally to this work
| | - Tongyao Zhao
- Department of Plant Pathology, College of Plant Protection, Anhui Agricultural University, Hefei, 230036, China
- These authors contributed equally to this work
| | - Peitong Zhuang
- Department of Plant Pathology, College of Plant Protection, Anhui Agricultural University, Hefei, 230036, China
| | - Zhiqiang Song
- Department of Plant Pathology, College of Plant Protection, Anhui Agricultural University, Hefei, 230036, China
| | - Hui Du
- Department of Plant Pathology, College of Plant Protection, Anhui Agricultural University, Hefei, 230036, China
| | - Zhaozhao Tang
- Department of Plant Pathology, College of Plant Protection, Anhui Agricultural University, Hefei, 230036, China
| | - Zhimou Gao
- Department of Plant Pathology, College of Plant Protection, Anhui Agricultural University, Hefei, 230036, China
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157
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Chang H, Chen D, Kam J, Richardson T, Drenth J, Guo X, McIntyre CL, Chai S, Rae AL, Xue GP. Abiotic stress upregulated TaZFP34 represses the expression of type-B response regulator and SHY2 genes and enhances root to shoot ratio in wheat. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2016; 252:88-102. [PMID: 27717481 DOI: 10.1016/j.plantsci.2016.07.011] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2016] [Revised: 07/15/2016] [Accepted: 07/18/2016] [Indexed: 06/06/2023]
Abstract
Q-type C2H2 zinc finger proteins (ZFPs) are plant-specific DNA-binding proteins containing a conserved QALGGH motif. This study investigated the function of abiotic stress-inducible and predominantly root-expressed Triticum aestivum ZFPs (TaZFP22, TaZFP34 and TaZFP46) with a focus on TaZFP34. Expression of TaZFP34 in roots was upregulated by high salinity, dehydration, oxidative and cold stresses. Overexpression of TaZFP34 in wheat roots resulted in an increased root-to-shoot ratio, a phenomenon observed during plant adaptation to drying soil. Expression of a number of genes which are potentially involved in modulating root growth was significantly altered in the roots of TaZFP34 overexpressing lines. In particular, the transcript levels of TaRR12B, TaRR12D and TaSHY2 that are homologues of known negative regulators of root growth were significantly reduced. Expression of shoot growth-related genes, such as GA3-ox and expansins, was downregulated in the transgenic shoots. TaZFP34 bound to (C/G)AGT(G/A)-like elements in the promoters of TaZFP34 down-regulated TaRR12D and TaSHY2 and transrepressed the reporter gene expression driven by TaRR12D and TaSHY2 promoters. Expression of the above reporter genes was also repressed by TaZFP46 and TaZFP22. These data suggest that TaZFP34 is a transcriptional repressor and is involved in modulating the root-to-shoot ratio.
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Affiliation(s)
- Hongping Chang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Biology, Hunan University, Changsha 410082, PR China; CSIRO Agriculture, 306 Carmody Rd., St Lucia, QLD 4067, Australia.
| | - Dandan Chen
- College of Agronomy, Northwest Agriculture and Forestry University, Yangling, Shaanxi 712100, PR China; CSIRO Agriculture, 306 Carmody Rd., St Lucia, QLD 4067, Australia.
| | - Jason Kam
- Institute of Biological, Environmental & Rural Sciences, Aberystwyth University, Ceredigion, Wales SY23 3EB, UK.
| | - Terese Richardson
- CSIRO Agriculture, Clunies Ross Street, Canberra, ACT 2601, Australia.
| | - Janneke Drenth
- CSIRO Agriculture, 306 Carmody Rd., St Lucia, QLD 4067, Australia.
| | - Xinhong Guo
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Biology, Hunan University, Changsha 410082, PR China.
| | - C Lynne McIntyre
- CSIRO Agriculture, 306 Carmody Rd., St Lucia, QLD 4067, Australia.
| | - Shoucheng Chai
- College of Agronomy, Northwest Agriculture and Forestry University, Yangling, Shaanxi 712100, PR China.
| | - Anne L Rae
- CSIRO Agriculture, 306 Carmody Rd., St Lucia, QLD 4067, Australia.
| | - Gang-Ping Xue
- CSIRO Agriculture, 306 Carmody Rd., St Lucia, QLD 4067, Australia.
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158
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Lane T, Best T, Zembower N, Davitt J, Henry N, Xu Y, Koch J, Liang H, McGraw J, Schuster S, Shim D, Coggeshall MV, Carlson JE, Staton ME. The green ash transcriptome and identification of genes responding to abiotic and biotic stresses. BMC Genomics 2016; 17:702. [PMID: 27589953 PMCID: PMC5009568 DOI: 10.1186/s12864-016-3052-0] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2016] [Accepted: 08/27/2016] [Indexed: 11/25/2022] Open
Abstract
Background To develop a set of transcriptome sequences to support research on environmental stress responses in green ash (Fraxinus pennsylvanica), we undertook deep RNA sequencing of green ash tissues under various stress treatments. The treatments, including emerald ash borer (EAB) feeding, heat, drought, cold and ozone, were selected to mimic the increasing threats of climate change and invasive pests faced by green ash across its native habitat. Results We report the generation and assembly of RNA sequences from 55 green ash samples into 107,611 putative unique transcripts (PUTs). 52,899 open reading frames were identified. Functional annotation of the PUTs by comparison to the Uniprot protein database identified matches for 63 % of transcripts and for 98 % of transcripts with ORFs. Further functional annotation identified conserved protein domains and assigned gene ontology terms to the PUTs. Examination of transcript expression across different RNA libraries revealed that expression patterns clustered based on tissues regardless of stress treatment. The transcripts from stress treatments were further examined to identify differential expression. Tens to hundreds of differentially expressed PUTs were identified for each stress treatment. A set of 109 PUTs were found to be consistently up or down regulated across three or more different stress treatments, representing basal stress response candidate genes in green ash. In addition, 1956 simple sequence repeats were identified in the PUTs, of which we identified 465 high quality DNA markers and designed flanking PCR primers. Conclusions North American native ash trees have suffered extensive mortality due to EAB infestation, creating a need to breed or select for resistant green ash genotypes. Stress from climate change is an additional concern for longevity of native ash populations. The use of genomics could accelerate management efforts. The green ash transcriptome we have developed provides important sequence information, genetic markers and stress-response candidate genes. Electronic supplementary material The online version of this article (doi:10.1186/s12864-016-3052-0) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Thomas Lane
- Department of Entomology and Plant Pathology, University of Tennessee, Knoxville, TN, 37966, USA
| | - Teodora Best
- Department of Ecosystem Science and Management, Pennsylvania State University, University Park, PA, 16802, USA
| | - Nicole Zembower
- Department of Ecosystem Science and Management, Pennsylvania State University, University Park, PA, 16802, USA
| | - Jack Davitt
- Department of Entomology and Plant Pathology, University of Tennessee, Knoxville, TN, 37966, USA
| | - Nathan Henry
- Department of Entomology and Plant Pathology, University of Tennessee, Knoxville, TN, 37966, USA
| | - Yi Xu
- Department of Plant Biology and Pathology, Rutgers University, New Brunswick, NJ, 08901, USA.,Department of Genetics and Biochemistry, Clemson University, Clemson, SC, 29634, USA
| | - Jennifer Koch
- Northern Research Station, USDA Forest Service, Delaware, OH, 43015, USA
| | - Haiying Liang
- Department of Plant Biology and Pathology, Rutgers University, New Brunswick, NJ, 08901, USA
| | - John McGraw
- Center for Comparative Genomics and Bioinformatics, Pennsylvania State University, University Park, PA, 16802, USA
| | - Stephan Schuster
- Center for Comparative Genomics and Bioinformatics, Pennsylvania State University, University Park, PA, 16802, USA
| | - Donghwan Shim
- Department of Ecosystem Science and Management, Pennsylvania State University, University Park, PA, 16802, USA
| | - Mark V Coggeshall
- Department of Forestry, University of Missouri, Columbia, MO, 65211, USA
| | - John E Carlson
- Department of Ecosystem Science and Management, Pennsylvania State University, University Park, PA, 16802, USA
| | - Margaret E Staton
- Department of Entomology and Plant Pathology, University of Tennessee, Knoxville, TN, 37966, USA.
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159
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Chaparro-Giraldo A, Carreño-Venegas A. Diseño de casetes de expresión que confieran tolerancia a sequía y a glufosinato en maíz (Zea mays). ACTA BIOLÓGICA COLOMBIANA 2016. [DOI: 10.15446/abc.v21n3.51170] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
Como primera aproximación en la obtención de una línea transgénica de maíz tolerante a sequía y al herbicida glufosinato de amonio, se seleccionaron genes y elementos reguladores para el diseño in silico de casetes de expresión, a través del análisis de literatura científica y bases de datos de genes y patentes. Las secuencias génicas fueron modificadas con base en el criterio de uso codónico del maíz para optimizar su expresión. Los casetes de expresión diseñados con el software DNA 2.0., fueron sintetizados por una empresa especializada. La presencia del transgen y la expresión a nivel de mARN fue demostrada mediante PCR y RT-PCR en la planta modelo Nicotiana benthamiana transformada vía Agrobacterium tumefaciens. Un ensayo preliminar in vitro en condiciones simuladas de sequía en medio MS con PEG (PM 6000)10 % no demostró incremento notorio en la tolerancia de las plántulas transformantes, posiblemente debido a que el uso codónico del diseño no favorece la expresión génica en la planta modelo.
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160
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Wang X, Shan X, Xue C, Wu Y, Su S, Li S, Liu H, Jiang Y, Zhang Y, Yuan Y. Isolation and functional characterization of a cold responsive phosphatidylinositol transfer-associated protein, ZmSEC14p, from maize (Zea may L.). PLANT CELL REPORTS 2016; 35:1671-86. [PMID: 27061906 DOI: 10.1007/s00299-016-1980-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/11/2016] [Accepted: 03/31/2016] [Indexed: 05/10/2023]
Abstract
A Sec14-like protein, ZmSEC14p , from maize was structurally analyzed and functionally tested. Overexpression of ZmSEC14p in transgenic Arabidopsis conferred tolerance to cold stress. Sec14-like proteins are involved in essential biological processes, such as phospholipid metabolism, signal transduction, membrane trafficking, and stress response. Here, we reported a phosphatidylinositol transfer-associated protein, ZmSEC14p (accession no. KT932998), isolated from a cold-tolerant maize inbred line using the cDNA-AFLP approach and RACE-PCR method. Full-length cDNA that consisted of a single open reading frame (ORF) encoded a putative polypeptide of 295 amino acids. The ZmSEC14p protein was mainly localized in the nucleus, and its transcript was induced by cold, salt stresses, and abscisic acid (ABA) treatment in maize leaves and roots. Overexpression of ZmSEC14p in transgenic Arabidopsis conferred tolerance to cold stress. This tolerance was primarily displayed by the increased germination rate, root length, plant survival rate, accumulation of proline, activities of antioxidant enzymes, and the reduction of oxidative damage by reactive oxygen species (ROS). ZmSEC14p overexpression regulated the expression of phosphoinositide-specific phospholipase C, which cleaves phosphatidylinositol 4,5-bisphosphate (PIP2) and generates second messengers (inositol 1,4,5-trisphosphate and 1,2-diacylglycerol) in the phosphoinositide signal transduction pathways. Moreover, up-regulation of some stress-responsive genes such as CBF3, COR6.6, and RD29B in transgenic plants under cold stress could be a possible mechanism for enhancing cold tolerance. Taken together, this study strongly suggests that ZmSEC14p plays an important role in plant tolerance to cold stress.
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Affiliation(s)
- Xiaoyu Wang
- College of Plant Science, Jilin University, Changchun, 130062, China
| | - Xiaohui Shan
- College of Plant Science, Jilin University, Changchun, 130062, China
| | - Chunmei Xue
- College of Plant Science, Jilin University, Changchun, 130062, China
| | - Ying Wu
- College of Plant Science, Jilin University, Changchun, 130062, China
| | - Shengzhong Su
- College of Plant Science, Jilin University, Changchun, 130062, China
| | - Shipeng Li
- College of Plant Science, Jilin University, Changchun, 130062, China
| | - Hongkui Liu
- College of Plant Science, Jilin University, Changchun, 130062, China
| | - Yuan Jiang
- College of Plant Science, Jilin University, Changchun, 130062, China
| | - Yanfei Zhang
- College of Plant Science, Jilin University, Changchun, 130062, China
| | - Yaping Yuan
- College of Plant Science, Jilin University, Changchun, 130062, China.
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161
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Wang F, Tong W, Zhu H, Kong W, Peng R, Liu Q, Yao Q. A novel Cys2/His2 zinc finger protein gene from sweetpotato, IbZFP1, is involved in salt and drought tolerance in transgenic Arabidopsis. PLANTA 2016; 243:783-97. [PMID: 26691387 DOI: 10.1007/s00425-015-2443-9] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2015] [Accepted: 12/08/2015] [Indexed: 05/21/2023]
Abstract
IbZFP1, encoding a Cys 2/His 2 zinc finger protein gene from sweetpotato, enhances salt and drought tolerance in transgenic Arabidopsis by regulating ABA signaling pathway, proline biosynthesis, stress responses and ROS scavenging. In plants, Cys2/His2 zinc finger proteins play important roles in regulating the growth and development or responses to abiotic stresses. In this study, a novel Cys2/His2 zinc finger protein gene, named IbZFP1, was isolated from drought-tolerant sweetpotato [Ipomoea batatas (L.) Lam.] line Xu55-2. Subcellular localization analysis in onion epidermal cells indicated that IbZFP1 was localized to the nucleus. Expression analysis in yeast showed that the full length of IbZFP1 exhibited transcriptional activation. Expression of IbZFP1 was induced by NaCl, polyethylene glycol and abscisic acid (ABA). Overexpression of IbZFP1 significantly enhanced salt and drought tolerance in transgenic Arabidopsis plants. Real-time quantitative PCR (qRT-PCR) analysis showed that overexpression of IbZFP1 up-regulated the genes involved in ABA signaling pathway, proline biosynthesis, stress responses, and ROS scavenging under salt and drought stresses. Meanwhile, Western blot and enzymatic analyses showed that the activities of 9-cis-epoxycarotenoid dioxygenase, pyrroline-5-carboxylate synthase, superoxide dismutase, catalase, ascorbate peroxidase, and peroxidase were also increased. Further component analyses indicated that the significant increase of ABA, proline, soluble sugar and total chlorophyll content and the significant reduction of H2O2 and malonaldehyde content were observed under salt and drought stresses. In addition, the rates of electrolyte leakage and water loss were reduced in transgenic plants. The overall results demonstrate the explicit role of IbZFP1 in conferring salt and drought tolerance in transgenic Arabidopsis plants. The IbZFP1 gene has the potential to be used to enhance the tolerance to abiotic stresses in plants.
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Affiliation(s)
- Feibing Wang
- Shanghai Key Laboratory of Agricultural Genetic Breeding, Biotech Research Institute, Shanghai Academy of Agricultural Sciences, Shanghai, 201106, China
| | - Wenjie Tong
- Yunnan Academy of Tobacco Agricultural Sciences, Kunming, 650021, China
| | - Hong Zhu
- Beijing Key Laboratory of Crop Genetic Improvement/Laboratory of Crop Heterosis and Utilization, Ministry of Education, China Agricultural University, Beijing, 100193, China
| | - Weili Kong
- Tianjin Key Laboratory of Food Nutrition and Safety, Ministry of Education, Tianjin University of Science and Technology, Tianjin, 300457, China
| | - Rihe Peng
- Shanghai Key Laboratory of Agricultural Genetic Breeding, Biotech Research Institute, Shanghai Academy of Agricultural Sciences, Shanghai, 201106, China
| | - Qingchang Liu
- Beijing Key Laboratory of Crop Genetic Improvement/Laboratory of Crop Heterosis and Utilization, Ministry of Education, China Agricultural University, Beijing, 100193, China
| | - Quanhong Yao
- Shanghai Key Laboratory of Agricultural Genetic Breeding, Biotech Research Institute, Shanghai Academy of Agricultural Sciences, Shanghai, 201106, China.
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162
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Wang F, Tong W, Zhu H, Kong W, Peng R, Liu Q, Yao Q. A novel Cys2/His2 zinc finger protein gene from sweetpotato, IbZFP1, is involved in salt and drought tolerance in transgenic Arabidopsis. PLANTA 2016; 243:783-797. [PMID: 26691387 DOI: 10.1007/s00425-015-2443-2449] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 10/28/2015] [Accepted: 12/08/2015] [Indexed: 05/23/2023]
Abstract
IbZFP1, encoding a Cys 2/His 2 zinc finger protein gene from sweetpotato, enhances salt and drought tolerance in transgenic Arabidopsis by regulating ABA signaling pathway, proline biosynthesis, stress responses and ROS scavenging. In plants, Cys2/His2 zinc finger proteins play important roles in regulating the growth and development or responses to abiotic stresses. In this study, a novel Cys2/His2 zinc finger protein gene, named IbZFP1, was isolated from drought-tolerant sweetpotato [Ipomoea batatas (L.) Lam.] line Xu55-2. Subcellular localization analysis in onion epidermal cells indicated that IbZFP1 was localized to the nucleus. Expression analysis in yeast showed that the full length of IbZFP1 exhibited transcriptional activation. Expression of IbZFP1 was induced by NaCl, polyethylene glycol and abscisic acid (ABA). Overexpression of IbZFP1 significantly enhanced salt and drought tolerance in transgenic Arabidopsis plants. Real-time quantitative PCR (qRT-PCR) analysis showed that overexpression of IbZFP1 up-regulated the genes involved in ABA signaling pathway, proline biosynthesis, stress responses, and ROS scavenging under salt and drought stresses. Meanwhile, Western blot and enzymatic analyses showed that the activities of 9-cis-epoxycarotenoid dioxygenase, pyrroline-5-carboxylate synthase, superoxide dismutase, catalase, ascorbate peroxidase, and peroxidase were also increased. Further component analyses indicated that the significant increase of ABA, proline, soluble sugar and total chlorophyll content and the significant reduction of H2O2 and malonaldehyde content were observed under salt and drought stresses. In addition, the rates of electrolyte leakage and water loss were reduced in transgenic plants. The overall results demonstrate the explicit role of IbZFP1 in conferring salt and drought tolerance in transgenic Arabidopsis plants. The IbZFP1 gene has the potential to be used to enhance the tolerance to abiotic stresses in plants.
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Affiliation(s)
- Feibing Wang
- Shanghai Key Laboratory of Agricultural Genetic Breeding, Biotech Research Institute, Shanghai Academy of Agricultural Sciences, Shanghai, 201106, China
| | - Wenjie Tong
- Yunnan Academy of Tobacco Agricultural Sciences, Kunming, 650021, China
| | - Hong Zhu
- Beijing Key Laboratory of Crop Genetic Improvement/Laboratory of Crop Heterosis and Utilization, Ministry of Education, China Agricultural University, Beijing, 100193, China
| | - Weili Kong
- Tianjin Key Laboratory of Food Nutrition and Safety, Ministry of Education, Tianjin University of Science and Technology, Tianjin, 300457, China
| | - Rihe Peng
- Shanghai Key Laboratory of Agricultural Genetic Breeding, Biotech Research Institute, Shanghai Academy of Agricultural Sciences, Shanghai, 201106, China
| | - Qingchang Liu
- Beijing Key Laboratory of Crop Genetic Improvement/Laboratory of Crop Heterosis and Utilization, Ministry of Education, China Agricultural University, Beijing, 100193, China
| | - Quanhong Yao
- Shanghai Key Laboratory of Agricultural Genetic Breeding, Biotech Research Institute, Shanghai Academy of Agricultural Sciences, Shanghai, 201106, China.
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163
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Qin LX, Nie XY, Hu R, Li G, Xu WL, Li XB. Phosphorylation of serine residue modulates cotton Di19-1 and Di19-2 activities for responding to high salinity stress and abscisic acid signaling. Sci Rep 2016; 6:20371. [PMID: 26829353 PMCID: PMC4734338 DOI: 10.1038/srep20371] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2015] [Accepted: 12/21/2015] [Indexed: 11/09/2022] Open
Abstract
Di19 (drought-induced protein 19) family is a novel type of Cys2/His2 zinc-finger proteins. In this study, we demonstrated that cotton Di19-1 and Di19-2 (GhDi19-1/-2) proteins could be phosphorylated in vitro by the calcium-dependent protein kinase (CDPK). Mutation of Ser to Ala in N-terminus of GhDi19-1/-2 led to the altered subcellular localization of the two proteins, but the constitutively activated form (Ser was mutated to Asp) of GhDi19-1/-2 still showed the nuclear localization. GhDi19-1/-2 overexpression transgenic Arabidopsis seedlings displayed the hypersensitivity to high salinity and abscisic acid (ABA). However, Ser site-mutated GhDi19-1(S116A) and GhDi19-2(S114A), and Ser and Thr double sites-mutated GhDi19-1(S/T-A/A) and GhDi19-2(S/T-A/A) transgenic Arabidopsis did not show the salt- and ABA-hypersensitive phenotypes. In contrast, overexpression of Thr site-mutated GhDi19-1(T114A) and GhDi19-2(T112A) in Arabidopsis still resulted in salt- and ABA-hypersensitivity phenotypes, like GhDi19-1/-2 transgenic lines. Overexpression of GhDi19-1/-2 and their constitutively activated forms in Atcpk11 background could recover the salt- and ABA-insensitive phenotype of the mutant. Thus, our results demonstrated that Ser phosphorylation (not Thr phosphorylation) is crucial for functionally activating GhDi19-1/-2 in response to salt stress and ABA signaling during early plant development, and GhDi19-1/-2 proteins may be downstream targets of CDPKs in ABA signal pathway.
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Affiliation(s)
- Li-Xia Qin
- Hubei Key Laboratory of Genetic Regulation and Integrative Biology, School of Life Sciences, Central China Normal University, Wuhan 430079, China.,Institute of Cotton, Shanxi Academy of Agricultural Sciences, Yuncheng 044000, China
| | - Xiao-Ying Nie
- Hubei Key Laboratory of Genetic Regulation and Integrative Biology, School of Life Sciences, Central China Normal University, Wuhan 430079, China
| | - Rong Hu
- Hubei Key Laboratory of Genetic Regulation and Integrative Biology, School of Life Sciences, Central China Normal University, Wuhan 430079, China
| | - Gang Li
- Hubei Key Laboratory of Genetic Regulation and Integrative Biology, School of Life Sciences, Central China Normal University, Wuhan 430079, China
| | - Wen-Liang Xu
- Hubei Key Laboratory of Genetic Regulation and Integrative Biology, School of Life Sciences, Central China Normal University, Wuhan 430079, China
| | - Xue-Bao Li
- Hubei Key Laboratory of Genetic Regulation and Integrative Biology, School of Life Sciences, Central China Normal University, Wuhan 430079, China
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Hichri I, Muhovski Y, Clippe A, Žižková E, Dobrev PI, Motyka V, Lutts S. SlDREB2, a tomato dehydration-responsive element-binding 2 transcription factor, mediates salt stress tolerance in tomato and Arabidopsis. PLANT, CELL & ENVIRONMENT 2016; 39:62-79. [PMID: 26082265 DOI: 10.1111/pce.12591] [Citation(s) in RCA: 64] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2015] [Revised: 05/17/2015] [Accepted: 05/18/2015] [Indexed: 05/02/2023]
Abstract
To counter environmental cues, cultivated tomato (Solanum lycopersicum L.) has evolved adaptive mechanisms requiring regulation of downstream genes. The dehydration-responsive element-binding protein 2 (DREB2) transcription factors regulate abiotic stresses responses in plants. Herein, we isolated a novel DREB2-type regulator involved in salinity response, named SlDREB2. Spatio-temporal expression profile together with investigation of its promoter activity indicated that SlDREB2 is expressed during early stages of seedling establishment and in various vegetative and reproductive organs of adult plants. SlDREB2 is up-regulated in roots and young leaves following exposure to NaCl, but is also induced by KCl and drought. Its overexpression in WT Arabidopsis and atdreb2a mutants improved seed germination and plant growth in presence of different osmotica. In tomato, SlDREB2 affected vegetative and reproductive organs development and the intronic sequence present in the 5' UTR drives its expression. Physiological, biochemical and transcriptomic analyses showed that SlDREB2 enhanced plant tolerance to salinity by improvement of K(+) /Na(+) ratio, and proline and polyamines biosynthesis. Exogenous hormonal treatments (abscisic acid, auxin and cytokinins) and analysis of WT and 35S::SlDREB2 tomatoes hormonal contents highlighted SlDREB2 involvement in abscisic acid biosynthesis/signalling. Altogether, our results provide an overview of SlDREB2 mode of action during early salt stress response.
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Affiliation(s)
- Imène Hichri
- Groupe de Recherche en Physiologie Végétale (GRPV), Earth and Life Institute - Agronomy (ELI-A), Université catholique de Louvain (UCL), B-1348, Louvain-la-Neuve, Belgium
| | - Yordan Muhovski
- Département Sciences du vivant, Centre wallon de Recherches Agronomiques, B-5030, Gembloux, Belgium
| | - André Clippe
- Institut des Sciences de la Vie (ISV), Université catholique de Louvain (UCL), B-1348, Louvain-la-Neuve, Belgium
| | - Eva Žižková
- Institute of Experimental Botany, Academy of Sciences of the Czech Republic, 165 02, Prague 6, Czech Republic
| | - Petre I Dobrev
- Institute of Experimental Botany, Academy of Sciences of the Czech Republic, 165 02, Prague 6, Czech Republic
| | - Vaclav Motyka
- Institute of Experimental Botany, Academy of Sciences of the Czech Republic, 165 02, Prague 6, Czech Republic
| | - Stanley Lutts
- Groupe de Recherche en Physiologie Végétale (GRPV), Earth and Life Institute - Agronomy (ELI-A), Université catholique de Louvain (UCL), B-1348, Louvain-la-Neuve, Belgium
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165
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Wu ZG, Jiang W, Chen SL, Mantri N, Tao ZM, Jiang CX. Insights from the Cold Transcriptome and Metabolome of Dendrobium officinale: Global Reprogramming of Metabolic and Gene Regulation Networks during Cold Acclimation. FRONTIERS IN PLANT SCIENCE 2016; 7:1653. [PMID: 27877182 PMCID: PMC5099257 DOI: 10.3389/fpls.2016.01653] [Citation(s) in RCA: 64] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2016] [Accepted: 10/20/2016] [Indexed: 05/20/2023]
Abstract
Plant cold acclimation (CA) is a genetically complex phenomenon involving gene regulation and expression. Little is known about the cascading pattern of gene regulatroy network and the link between genes and metabolites during CA. Dendrobium officinale (DOKM) is an important medicinal and ornamental plant and hypersensitive to low temperature. Here, we used the large scale metabolomic and transcriptomic technologies to reveal the response to CA in DOKM seedlings based on the physiological profile analyses. Lowering temperature from 4 to -2°C resulted in significant increase (P < 0.01) in antioxidant activities and electrolyte leakage (EL) during 24 h. The fitness CA piont of 0°C and control (20°C) during 20 h were firstly obtained according to physiological analyses. Subsequently, massive transcriptome and metabolome reprogramming occurred during CA. The gene to metabolite network demonstrated that the CA associated processes are highly energy demanding through activating hydrolysis of sugars, amino acids catabolism and citrate cycle. The expression levels of 2,767 genes were significantly affected by CA, including 153-fold upregulation of CBF transcription factor, 56-fold upregulation of MAPKKK16 protein kinase. Moreover, the gene interaction and regulation network analysis revealed that the CA as an active process, was regulated at the transcriptional, post-transcriptional, translational and post-translational levels. Our findings highligted a comprehensive regulatory mechanism including cold signal transduction, transcriptional regulation, and gene expression, which contributes a deeper understanding of the highly complex regulatory program during CA in DOKM. Some marker genes identified in DOKM seedlings will allow us to understand the role of each individual during CA by further functional analyses.
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Affiliation(s)
- Zhi-Gang Wu
- Zhejiang Institute of Subtropical Crops, Zhejiang Academy of Agricultural SciencesWenzhou, China
- *Correspondence: Zhi-Gang Wu, Zheng-Ming Tao,
| | - Wu Jiang
- Zhejiang Institute of Subtropical Crops, Zhejiang Academy of Agricultural SciencesWenzhou, China
| | - Song-Lin Chen
- Zhejiang Institute of Subtropical Crops, Zhejiang Academy of Agricultural SciencesWenzhou, China
- School of Applied Sciences, Health Innovations Research Institute, Royal Melbourne Institute of Technology University, MelbourneVIC, Australia
| | - Nitin Mantri
- School of Applied Sciences, Health Innovations Research Institute, Royal Melbourne Institute of Technology University, MelbourneVIC, Australia
| | - Zheng-Ming Tao
- Zhejiang Institute of Subtropical Crops, Zhejiang Academy of Agricultural SciencesWenzhou, China
- *Correspondence: Zhi-Gang Wu, Zheng-Ming Tao,
| | - Cheng-Xi Jiang
- Zhejiang Institute of Subtropical Crops, Zhejiang Academy of Agricultural SciencesWenzhou, China
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166
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Brilhaus D, Bräutigam A, Mettler-Altmann T, Winter K, Weber APM. Reversible Burst of Transcriptional Changes during Induction of Crassulacean Acid Metabolism in Talinum triangulare. PLANT PHYSIOLOGY 2016; 170:102-22. [PMID: 26530316 PMCID: PMC4704576 DOI: 10.1104/pp.15.01076] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2015] [Accepted: 11/03/2015] [Indexed: 05/14/2023]
Abstract
Drought tolerance is a key factor for agriculture in the 21st century as it is a major determinant of plant survival in natural ecosystems as well as crop productivity. Plants have evolved a range of mechanisms to cope with drought, including a specialized type of photosynthesis termed Crassulacean acid metabolism (CAM). CAM is associated with stomatal closure during the day as atmospheric CO2 is assimilated primarily during the night, thus reducing transpirational water loss. The tropical herbaceous perennial species Talinum triangulare is capable of transitioning, in a facultative, reversible manner, from C3 photosynthesis to weakly expressed CAM in response to drought stress. The transcriptional regulation of this transition has been studied. Combining mRNA-Seq with targeted metabolite measurements, we found highly elevated levels of CAM-cycle enzyme transcripts and their metabolic products in T. triangulare leaves upon water deprivation. The carbohydrate metabolism is rewired to reduce the use of reserves for growth to support the CAM-cycle and the synthesis of compatible solutes. This large-scale expression dataset of drought-induced CAM demonstrates transcriptional regulation of the C3-CAM transition. We identified candidate transcription factors to mediate this photosynthetic plasticity, which may contribute in the future to the design of more drought-tolerant crops via engineered CAM.
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Affiliation(s)
- Dominik Brilhaus
- Institute of Plant Biochemistry, Cluster of Excellence on Plant Sciences (CEPLAS), Heinrich-Heine-University, D-40225 Düsseldorf, Germany (D.B., A.B., T.M.-A., A.P.M.W.); and Smithsonian Tropical Research Institute, Balboa, Ancón, Republic of Panama (K.W.)
| | - Andrea Bräutigam
- Institute of Plant Biochemistry, Cluster of Excellence on Plant Sciences (CEPLAS), Heinrich-Heine-University, D-40225 Düsseldorf, Germany (D.B., A.B., T.M.-A., A.P.M.W.); and Smithsonian Tropical Research Institute, Balboa, Ancón, Republic of Panama (K.W.)
| | - Tabea Mettler-Altmann
- Institute of Plant Biochemistry, Cluster of Excellence on Plant Sciences (CEPLAS), Heinrich-Heine-University, D-40225 Düsseldorf, Germany (D.B., A.B., T.M.-A., A.P.M.W.); and Smithsonian Tropical Research Institute, Balboa, Ancón, Republic of Panama (K.W.)
| | - Klaus Winter
- Institute of Plant Biochemistry, Cluster of Excellence on Plant Sciences (CEPLAS), Heinrich-Heine-University, D-40225 Düsseldorf, Germany (D.B., A.B., T.M.-A., A.P.M.W.); and Smithsonian Tropical Research Institute, Balboa, Ancón, Republic of Panama (K.W.)
| | - Andreas P M Weber
- Institute of Plant Biochemistry, Cluster of Excellence on Plant Sciences (CEPLAS), Heinrich-Heine-University, D-40225 Düsseldorf, Germany (D.B., A.B., T.M.-A., A.P.M.W.); and Smithsonian Tropical Research Institute, Balboa, Ancón, Republic of Panama (K.W.)
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167
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Zhang D, Tong J, Xu Z, Wei P, Xu L, Wan Q, Huang Y, He X, Yang J, Shao H, Ma H. Soybean C2H2-Type Zinc Finger Protein GmZFP3 with Conserved QALGGH Motif Negatively Regulates Drought Responses in Transgenic Arabidopsis. FRONTIERS IN PLANT SCIENCE 2016; 7:325. [PMID: 27047508 PMCID: PMC4796006 DOI: 10.3389/fpls.2016.00325] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2015] [Accepted: 03/03/2016] [Indexed: 05/18/2023]
Abstract
Plant response to environmental stresses is regulated by a complicated network of regulatory and functional genes. In this study, we isolated the putative stress-associated gene GmZFP3 (a C2H2-type Zinc finger protein gene) based on the previous finding that it was one of two genes located in the QTL region between the Satt590 and Satt567 markers related to soybean tolerance to drought. Temporal and spatial expression analysis using quantitative real-time PCR indicated that GmZFP3 was primarily expressed in roots, stems and leaf organs and was expressed at low levels in flowers and soybean pods. Moreover, GmZFP3 expression increased in response to polyethylene glycol (PEG) and Abscisic acid (ABA) treatments. In addition, subcellular localization analysis indicated that GmZFP3 was ubiquitously distributed in plant cells. Transgenic experiments indicated that GmZFP3 played a negative role in plant tolerance to drought. Analysis of ABA-related marker gene expression in Arabidopsis suggested that GmZFP3 might be involved in the ABA-dependent pathway during the drought stress response. Taken together, these results suggest that soybean GmZFP3 negatively regulates the drought response.
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Affiliation(s)
- Dayong Zhang
- Jiangsu Key Laboratory for Bioresources of Saline Soils, Provincial Key Laboratory of Agrobiology, Institute of Biotechnology, Jiangsu Academy of Agricultural SciencesNanjing, China
- *Correspondence: Dayong Zhang
| | - Jinfeng Tong
- Institute of Botany, Chinese Academy of SciencesNanjing, China
| | - Zhaolong Xu
- Jiangsu Key Laboratory for Bioresources of Saline Soils, Provincial Key Laboratory of Agrobiology, Institute of Biotechnology, Jiangsu Academy of Agricultural SciencesNanjing, China
| | - Peipei Wei
- Jiangsu Key Laboratory for Bioresources of Saline Soils, Provincial Key Laboratory of Agrobiology, Institute of Biotechnology, Jiangsu Academy of Agricultural SciencesNanjing, China
| | - Ling Xu
- Jiangsu Key Laboratory for Bioresources of Saline Soils, Provincial Key Laboratory of Agrobiology, Institute of Biotechnology, Jiangsu Academy of Agricultural SciencesNanjing, China
| | - Qun Wan
- Jiangsu Key Laboratory for Bioresources of Saline Soils, Provincial Key Laboratory of Agrobiology, Institute of Biotechnology, Jiangsu Academy of Agricultural SciencesNanjing, China
| | - Yihong Huang
- Jiangsu Key Laboratory for Bioresources of Saline Soils, Provincial Key Laboratory of Agrobiology, Institute of Biotechnology, Jiangsu Academy of Agricultural SciencesNanjing, China
| | - Xiaolan He
- Jiangsu Key Laboratory for Bioresources of Saline Soils, Provincial Key Laboratory of Agrobiology, Institute of Biotechnology, Jiangsu Academy of Agricultural SciencesNanjing, China
| | - Jiayin Yang
- Huaiyin Institute of Agricultural Sciences of Xuhuai Region in JiangsuHuai'an, China
| | - Hongbo Shao
- Jiangsu Key Laboratory for Bioresources of Saline Soils, Provincial Key Laboratory of Agrobiology, Institute of Biotechnology, Jiangsu Academy of Agricultural SciencesNanjing, China
- Key Laboratory of Coastal Biology and Bioresources Utilization, Yantai Institute of Coastal Zone Research, Chinese Academy of SciencesYantai, China
- Hongbo Shao
| | - Hongxiang Ma
- Jiangsu Key Laboratory for Bioresources of Saline Soils, Provincial Key Laboratory of Agrobiology, Institute of Biotechnology, Jiangsu Academy of Agricultural SciencesNanjing, China
- Hongxiang Ma
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168
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Genome wide identification of C1-2i zinc finger proteins and their response to abiotic stress in hexaploid wheat. Mol Genet Genomics 2015; 291:873-90. [PMID: 26638714 DOI: 10.1007/s00438-015-1152-1] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2015] [Accepted: 11/20/2015] [Indexed: 12/27/2022]
Abstract
The C1-2i wheat Q-type C2H2 zinc finger protein (ZFP) transcription factor subclass has been reported to play important roles in plant stress responses. This subclass of ZFPs has not been studied in hexaploid wheat (Triticum aestivum) and we aimed to identify all members of this subclass and evaluate their responses to different abiotic stresses causing oxidative stress. Exploiting the recently published wheat draft genome sequence, we identified 53 members (including homoeologs from A, B and D genomes) of the C1-2i wheat Q-type C2H2 ZFPs (TaZFPs) representing 21 genes. Evolution analysis revealed that 9 TaZFPs members are directly inherited from the parents Triticum urartu and Aegilops tauschii, while 15 diverged through neoploidization events. This TaZFP subclass is responsive to the oxidative stress generator H2O2 and to high light, drought stress and flooding. Most TaZFPs are responsive to H2O2 (37/53), high light (44/53), flooding (31/53) or drought (37/53); 32 TaZFPs were up-regulated by at least 3 stresses and 16 were responsive to all stresses tested. A large number of these TaZFPs were physically mapped on different wheat draft genome sequences with known markers useful for QTL mapping. Our results show that the C1-2i subclass of TaZFPs is associated with responses to different abiotic stresses and that most TaZFPs (30/53 or 57 %) are located on group 5 chromosomes known to be involved in environment adaptation. Detailed characterization of these novel wheat TaZFPs and their association to QTL or eQTL may help to design wheat cultivars with improved tolerance to abiotic stress.
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169
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Prunier J, Tessier G, Bousquet J, MacKay J. From genotypes to phenotypes: expression levels of genes encompassing adaptive SNPs in black spruce. PLANT CELL REPORTS 2015; 34:2111-2125. [PMID: 26260097 DOI: 10.1007/s00299-015-1855-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2015] [Revised: 07/30/2015] [Accepted: 08/04/2015] [Indexed: 06/04/2023]
Abstract
Measuring transcript levels for adaptive genes revealed polymorphisms having cis -effect upon gene expression levels related to phenotype variation in a black spruce natural population. Trees growing in temperate and boreal regions must acclimate to changes in climatic factors such as low winter temperatures to survive to seasonal variations. Common garden studies have shown that genetic variation in quantitative traits helps species to survive and adapt to environmental changes and local conditions. Twenty-four genes carrying SNPs were previously associated with genetic adaptation in black spruce (Picea mariana [Mill.] BSP). The objectives of this study were to investigate the potential role of these genes in regulation of winter acclimation and adaptation by studying their patterns of expression as a function of the physiological stage during the annual growth cycle, tissue type, and their SNP genotypic class. Considerable variability in gene expression was observed between different vegetative tissues or organs, and between physiological stages. The genes were expressed predominantly in tissues that could be linked more directly to winter acclimation and adaptation. The expression levels of several of the genes were significantly related to variation in tree height growth or budset timing and expression level variation related to SNP genotypic classes was observed in four of the genes. An interaction between genotypic classes and physiological stages was also observed for some genes, indicating genotypes with different reaction norms in terms of gene expression.
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Affiliation(s)
- Julien Prunier
- Canada Research Chair in Forest and Environmental Genomics, Centre for Forest Research and Institute for System and Integrative Biology, Université Laval, 1030 Avenue de la Médecine, Québec, G1V0A6, Canada.
| | - Guillaume Tessier
- Canada Research Chair in Forest and Environmental Genomics, Centre for Forest Research and Institute for System and Integrative Biology, Université Laval, 1030 Avenue de la Médecine, Québec, G1V0A6, Canada
| | - Jean Bousquet
- Canada Research Chair in Forest and Environmental Genomics, Centre for Forest Research and Institute for System and Integrative Biology, Université Laval, 1030 Avenue de la Médecine, Québec, G1V0A6, Canada
| | - John MacKay
- Canada Research Chair in Forest and Environmental Genomics, Centre for Forest Research and Institute for System and Integrative Biology, Université Laval, 1030 Avenue de la Médecine, Québec, G1V0A6, Canada
- Department of Plant Sciences, University of Oxford, South Parks Road, Oxford, OX1 3RB, UK
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Lewis LA, Polanski K, de Torres-Zabala M, Jayaraman S, Bowden L, Moore J, Penfold CA, Jenkins DJ, Hill C, Baxter L, Kulasekaran S, Truman W, Littlejohn G, Prusinska J, Mead A, Steinbrenner J, Hickman R, Rand D, Wild DL, Ott S, Buchanan-Wollaston V, Smirnoff N, Beynon J, Denby K, Grant M. Transcriptional Dynamics Driving MAMP-Triggered Immunity and Pathogen Effector-Mediated Immunosuppression in Arabidopsis Leaves Following Infection with Pseudomonas syringae pv tomato DC3000. THE PLANT CELL 2015; 27:3038-64. [PMID: 26566919 PMCID: PMC4682296 DOI: 10.1105/tpc.15.00471] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2015] [Revised: 09/28/2015] [Accepted: 10/22/2015] [Indexed: 05/17/2023]
Abstract
Transcriptional reprogramming is integral to effective plant defense. Pathogen effectors act transcriptionally and posttranscriptionally to suppress defense responses. A major challenge to understanding disease and defense responses is discriminating between transcriptional reprogramming associated with microbial-associated molecular pattern (MAMP)-triggered immunity (MTI) and that orchestrated by effectors. A high-resolution time course of genome-wide expression changes following challenge with Pseudomonas syringae pv tomato DC3000 and the nonpathogenic mutant strain DC3000hrpA- allowed us to establish causal links between the activities of pathogen effectors and suppression of MTI and infer with high confidence a range of processes specifically targeted by effectors. Analysis of this information-rich data set with a range of computational tools provided insights into the earliest transcriptional events triggered by effector delivery, regulatory mechanisms recruited, and biological processes targeted. We show that the majority of genes contributing to disease or defense are induced within 6 h postinfection, significantly before pathogen multiplication. Suppression of chloroplast-associated genes is a rapid MAMP-triggered defense response, and suppression of genes involved in chromatin assembly and induction of ubiquitin-related genes coincide with pathogen-induced abscisic acid accumulation. Specific combinations of promoter motifs are engaged in fine-tuning the MTI response and active transcriptional suppression at specific promoter configurations by P. syringae.
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Affiliation(s)
- Laura A Lewis
- Warwick Systems Biology Centre, University of Warwick, Warwick CV4 7AL, United Kingdom School of Life Sciences, University of Warwick, Warwick CV4 7AL, United Kingdom
| | - Krzysztof Polanski
- Warwick Systems Biology Centre, University of Warwick, Warwick CV4 7AL, United Kingdom
| | - Marta de Torres-Zabala
- Biosciences, College of Life and Environmental Sciences, University of Exeter, Exeter EX4 4QD, United Kingdom
| | - Siddharth Jayaraman
- Biosciences, College of Life and Environmental Sciences, University of Exeter, Exeter EX4 4QD, United Kingdom
| | - Laura Bowden
- School of Life Sciences, University of Warwick, Warwick CV4 7AL, United Kingdom
| | - Jonathan Moore
- Warwick Systems Biology Centre, University of Warwick, Warwick CV4 7AL, United Kingdom
| | - Christopher A Penfold
- Warwick Systems Biology Centre, University of Warwick, Warwick CV4 7AL, United Kingdom
| | - Dafyd J Jenkins
- Warwick Systems Biology Centre, University of Warwick, Warwick CV4 7AL, United Kingdom
| | - Claire Hill
- School of Life Sciences, University of Warwick, Warwick CV4 7AL, United Kingdom
| | - Laura Baxter
- Warwick Systems Biology Centre, University of Warwick, Warwick CV4 7AL, United Kingdom
| | - Satish Kulasekaran
- Biosciences, College of Life and Environmental Sciences, University of Exeter, Exeter EX4 4QD, United Kingdom
| | - William Truman
- Biosciences, College of Life and Environmental Sciences, University of Exeter, Exeter EX4 4QD, United Kingdom
| | - George Littlejohn
- Biosciences, College of Life and Environmental Sciences, University of Exeter, Exeter EX4 4QD, United Kingdom
| | - Justyna Prusinska
- School of Life Sciences, University of Warwick, Warwick CV4 7AL, United Kingdom
| | - Andrew Mead
- School of Life Sciences, University of Warwick, Warwick CV4 7AL, United Kingdom
| | - Jens Steinbrenner
- School of Life Sciences, University of Warwick, Warwick CV4 7AL, United Kingdom
| | - Richard Hickman
- Warwick Systems Biology Centre, University of Warwick, Warwick CV4 7AL, United Kingdom
| | - David Rand
- Warwick Systems Biology Centre, University of Warwick, Warwick CV4 7AL, United Kingdom
| | - David L Wild
- Warwick Systems Biology Centre, University of Warwick, Warwick CV4 7AL, United Kingdom
| | - Sascha Ott
- Warwick Systems Biology Centre, University of Warwick, Warwick CV4 7AL, United Kingdom
| | - Vicky Buchanan-Wollaston
- Warwick Systems Biology Centre, University of Warwick, Warwick CV4 7AL, United Kingdom School of Life Sciences, University of Warwick, Warwick CV4 7AL, United Kingdom
| | - Nick Smirnoff
- Biosciences, College of Life and Environmental Sciences, University of Exeter, Exeter EX4 4QD, United Kingdom
| | - Jim Beynon
- Warwick Systems Biology Centre, University of Warwick, Warwick CV4 7AL, United Kingdom School of Life Sciences, University of Warwick, Warwick CV4 7AL, United Kingdom
| | - Katherine Denby
- Warwick Systems Biology Centre, University of Warwick, Warwick CV4 7AL, United Kingdom School of Life Sciences, University of Warwick, Warwick CV4 7AL, United Kingdom
| | - Murray Grant
- Biosciences, College of Life and Environmental Sciences, University of Exeter, Exeter EX4 4QD, United Kingdom
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171
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Fei J, Wang YS, Jiang ZY, Cheng H, Zhang JD. Identification of cold tolerance genes from leaves of mangrove plant Kandelia obovata by suppression subtractive hybridization. ECOTOXICOLOGY (LONDON, ENGLAND) 2015; 24:1686-96. [PMID: 26002218 DOI: 10.1007/s10646-015-1486-9] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 05/09/2015] [Indexed: 05/18/2023]
Abstract
Low temperature is a major abiotic stress that seriously limits mangrove productivity and distribution, the molecular mechanisms of cold tolerance involved in mangroves are still poorly understood at present. It was used to identify the potential cold-related genes in Kandelia obovata (K. obovata) by suppression subtractive hybridization. 334 cold-related expressed sequence tags (ESTs) out of 670 clones were isolated and sequenced. Among these ESTs, 143 unique cDNAs were identified and classified into ten groups, such as metabolism, energy, cell rescue and defense, transcription and photosynthesis according to NCBI blast. Based on bioinformatics analysis, these ESTs were mainly related to response to stimulus and metabolic process, and were included to 72 KEGG pathways. Two selected genes (e.g., aquaporin gene and zinc family protein gene) from the library were further analyzed by quantitative real-time PCR analysis. Both the two genes were found to be transcriptionally up-regulated under cold stress, which partly approve the construction of the subtractive cDNA library. The diversity of the putative functions of these genes indicated that cold stress resulted in a complex response in K. obovata. Further investigation on the functions and potential pathways of these genes will facilitate the understanding of the molecular adaptations to cold tolerance in mangrove plants.
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Affiliation(s)
- Jiao Fei
- State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China
| | - You-Shao Wang
- State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China.
- Daya Bay Marine Biology Research Station, Chinese Academy of Sciences, Shenzhen, 518121, China.
| | - Zhao-Yu Jiang
- State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China
| | - Hao Cheng
- State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China
| | - Jian-Dong Zhang
- State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China
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172
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Comparative Analysis of the Brassica napus Root and Leaf Transcript Profiling in Response to Drought Stress. Int J Mol Sci 2015; 16:18752-77. [PMID: 26270661 PMCID: PMC4581270 DOI: 10.3390/ijms160818752] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2015] [Revised: 07/28/2015] [Accepted: 07/30/2015] [Indexed: 02/03/2023] Open
Abstract
Drought stress is one of the major abiotic factors affecting Brassica napus (B. napus) productivity. In order to identify genes of potential importance to drought stress and obtain a deeper understanding of the molecular mechanisms regarding the responses of B. napus to dehydration stress, we performed large-scale transcriptome sequencing of B. napus plants under dehydration stress using the Illumina sequencing technology. In this work, a relatively drought tolerant B. napus line, Q2, identified in our previous study, was used. Four cDNA libraries constructed from mRNAs of control and dehydration-treated root and leaf were sequenced by Illumina technology. A total of 6018 and 5377 differentially expressed genes (DEGs) were identified in root and leaf. In addition, 1745 genes exhibited a coordinated expression profile between the two tissues under drought stress, 1289 (approximately 74%) of which showed an inverse relationship, demonstrating different regulation patterns between the root and leaf. The gene ontology (GO) enrichment test indicated that up-regulated genes in root were mostly involved in “stimulus” “stress” biological process, and activated genes in leaf mainly functioned in “cell” “cell part” components. Furthermore, a comparative network related to plant hormone signal transduction and AREB/ABF, AP2/EREBP, NAC, WRKY and MYC/MYB transcription factors (TFs) provided a view of different stress tolerance mechanisms between root and leaf. Some of the DEGs identified may be candidates for future research aimed at detecting drought-responsive genes and will be useful for understanding the molecular mechanisms of drought tolerance in root and leaf of B. napus.
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173
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Liu Q, Wang Z, Xu X, Zhang H, Li C. Genome-Wide Analysis of C2H2 Zinc-Finger Family Transcription Factors and Their Responses to Abiotic Stresses in Poplar (Populus trichocarpa). PLoS One 2015; 10:e0134753. [PMID: 26237514 PMCID: PMC4523194 DOI: 10.1371/journal.pone.0134753] [Citation(s) in RCA: 76] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2015] [Accepted: 07/13/2015] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND C2H2 zinc-finger (C2H2-ZF) proteins are a large gene family in plants that participate in various aspects of normal plant growth and development, as well as in biotic and abiotic stress responses. To date, no overall analysis incorporating evolutionary history and expression profiling of the C2H2-ZF gene family in model tree species poplar (Populus trichocarpa) has been reported. PRINCIPAL FINDINGS Here, we identified 109 full-length C2H2-ZF genes in P. trichocarpa, and classified them into four groups, based on phylogenetic analysis. The 109 C2H2-ZF genes were distributed unequally on 19 P. trichocarpa linkage groups (LGs), with 39 segmental duplication events, indicating that segmental duplication has been important in the expansion of the C2H2-ZF gene family. Promoter cis-element analysis indicated that most of the C2H2-ZF genes contain phytohormone or abiotic stress-related cis-elements. The expression patterns of C2H2-ZF genes, based on heatmap analysis, suggested that C2H2-ZF genes are involved in tissue and organ development, especially root and floral development. Expression analysis based on quantitative real-time reverse transcription polymerase chain reaction indicated that C2H2-ZF genes are significantly involved in drought, heat and salt response, possibly via different mechanisms. CONCLUSIONS This study provides a thorough overview of the P. trichocarpa C2H2-ZF gene family and presents a new perspective on the evolution of this gene family. In particular, some C2H2-ZF genes may be involved in environmental stress tolerance regulation. PtrZFP2, 19 and 95 showed high expression levels in leaves and/or roots under environmental stresses. Additionally, this study provided a solid foundation for studying the biological roles of C2H2-ZF genes in Populus growth and development. These results form the basis for further investigation of the roles of these candidate genes and for future genetic engineering and gene functional studies in Populus.
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Affiliation(s)
- Quangang Liu
- State Key Laboratory of Tree Genetics and Breeding, Northeast Forestry University, Harbin, Heilongjiang, People’s Republic of China
| | - Zhanchao Wang
- State Key Laboratory of Tree Genetics and Breeding, Northeast Forestry University, Harbin, Heilongjiang, People’s Republic of China
| | - Xuemei Xu
- Library of Northeast Forestry University, Harbin, Heilongjiang, People’s Republic of China
| | - Haizhen Zhang
- State Key Laboratory of Tree Genetics and Breeding, Northeast Forestry University, Harbin, Heilongjiang, People’s Republic of China
| | - Chenghao Li
- State Key Laboratory of Tree Genetics and Breeding, Northeast Forestry University, Harbin, Heilongjiang, People’s Republic of China
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174
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Matsuo M, Johnson JM, Hieno A, Tokizawa M, Nomoto M, Tada Y, Godfrey R, Obokata J, Sherameti I, Yamamoto YY, Böhmer FD, Oelmüller R. High REDOX RESPONSIVE TRANSCRIPTION FACTOR1 Levels Result in Accumulation of Reactive Oxygen Species in Arabidopsis thaliana Shoots and Roots. MOLECULAR PLANT 2015; 8:1253-73. [PMID: 25882345 DOI: 10.1016/j.molp.2015.03.011] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2015] [Revised: 03/17/2015] [Accepted: 03/19/2015] [Indexed: 05/07/2023]
Abstract
Redox Responsive Transcription Factor1 (RRTF1) in Arabidopsis is rapidly and transiently upregulated by H2O2, as well as biotic- and abiotic-induced redox signals. RRTF1 is highly conserved in angiosperms, but its physiological role remains elusive. Here we show that inactivation of RRTF1 restricts and overexpression promotes reactive oxygen species (ROS) accumulation in response to stress. Transgenic lines overexpressing RRTF1 are impaired in root and shoot development, light sensitive, and susceptible to Alternaria brassicae infection. These symptoms are diminished by the beneficial root endophyte Piriformospora indica, which reduces ROS accumulation locally in roots and systemically in shoots, and by antioxidants and ROS inhibitors that scavenge ROS. More than 800 genes were detected in mature leaves and seedlings of transgenic lines overexpressing RRTF1; ∼ 40% of them have stress-, redox-, ROS-regulated-, ROS-scavenging-, defense-, cell death- and senescence-related functions. Bioinformatic analyses and in vitro DNA binding assays demonstrate that RRTF1 binds to GCC-box-like sequences in the promoter of RRTF1-responsive genes. Upregulation of RRTF1 by stress stimuli and H2O2 requires WRKY18/40/60. RRTF1 is co-regulated with the phylogenetically related RAP2.6, which contains a GCC-box-like sequence in its promoter, but transgenic lines overexpressing RAP2.6 do not accumulate higher ROS levels. RRTF1 also stimulates systemic ROS accumulation in distal non-stressed leaves. We conclude that the elevated levels of the highly conserved RRTF1 induce ROS accumulation in response to ROS and ROS-producing abiotic and biotic stress signals.
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Affiliation(s)
- Mitsuhiro Matsuo
- Institute of Plant Physiology, Friedrich-Schiller University Jena, Dornburger Straße 159, 07743 Jena, Germany; Graduate School of Life and Environmental Sciences, Kyoto Prefectural University, 1-5 Hangi-cho, Shimogamo, Sakyo-ku, Kyoto 606-8522, Japan
| | - Joy Michal Johnson
- Institute of Plant Physiology, Friedrich-Schiller University Jena, Dornburger Straße 159, 07743 Jena, Germany
| | - Ayaka Hieno
- Faculty of Applied Biological Sciences, Gifu University, Yanagido 1-1, Gifu City 501-1193, Japan
| | - Mutsutomo Tokizawa
- Faculty of Applied Biological Sciences, Gifu University, Yanagido 1-1, Gifu City 501-1193, Japan
| | - Mika Nomoto
- Center for Gene Research, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan
| | - Yasuomi Tada
- Center for Gene Research, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan
| | - Rinesh Godfrey
- Institute of Molecular Cell Biology, Center for Molecular Biomedicine, Jena University Hospital, 00743 Jena, Germany; Molecular Cardiology, Department of Cardiovascular Medicine, University Hospital Münster, 48149 Münster, Germany
| | - Junichi Obokata
- Graduate School of Life and Environmental Sciences, Kyoto Prefectural University, 1-5 Hangi-cho, Shimogamo, Sakyo-ku, Kyoto 606-8522, Japan
| | - Irena Sherameti
- Institute of Plant Physiology, Friedrich-Schiller University Jena, Dornburger Straße 159, 07743 Jena, Germany
| | - Yoshiharu Y Yamamoto
- Faculty of Applied Biological Sciences, Gifu University, Yanagido 1-1, Gifu City 501-1193, Japan
| | - Frank-D Böhmer
- Institute of Molecular Cell Biology, Center for Molecular Biomedicine, Jena University Hospital, 00743 Jena, Germany
| | - Ralf Oelmüller
- Institute of Plant Physiology, Friedrich-Schiller University Jena, Dornburger Straße 159, 07743 Jena, Germany.
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175
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Leng X, Han J, Wang X, Zhao M, Sun X, Wang C, Fang J. Characterization of a Calmodulin-binding Transcription Factor from Strawberry (Fragaria × ananassa). THE PLANT GENOME 2015; 8:eplantgenome2014.08.0039. [PMID: 33228307 DOI: 10.3835/plantgenome2014.08.0039] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2014] [Indexed: 06/11/2023]
Abstract
Calmodulin-binding transcription activator (CAMTA) is a calmodulin-binding transcription factor that has a broad range of functions from sensory mechanisms to regulating many growth and developmental processes. In this study, we isolated four strawberry CAMTA (FaCAMTA) genes using HMMER and BLAST analysis. The chromosome scaffold locations of these CAMTA genes in the strawberry genome were determined and the protein domain and motif organization [CG-1, transcription factor immunoglobulin, ankyrin (ANK) repeats, calmodulin-binding IQ motif) of FaCAMTAs were also assessed. All FaCAMTAs were predicted to be Ca- and calmodulin-binding proteins. The expression profiles of FaCAMTA genes were measured in different tissues and revealed distinct FaCAMTA gene expression patterns under heat, cold, and salt stress. These data not only contribute to a better understanding of the complex regulation of the FaCAMTA gene family but also provide evidence supporting the role of CAMTAs in multiple signaling pathways involved in stress responses. This investigation can provide useful information for further study.
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Affiliation(s)
- Xiangpeng Leng
- College of Horticulture, Nanjing Agricultural Univ., Tongwei Rd. 6, Nanjing, 210095, P.R. China
| | - Jian Han
- College of Horticulture, Nanjing Agricultural Univ., Tongwei Rd. 6, Nanjing, 210095, P.R. China
| | - Xiaomin Wang
- Institute of Botany, Jiangsu Province and the Chinese Academy of Sciences, P.O. Box1435, No.1 Qianhu Houcun, Zhongshanmen Wai, Nanjing, 210014, P.R. China
| | - Mizhen Zhao
- Institute of Horticulture, Jiangsu Academy of Agricultural Sciences, Zhongling St. 50, Nanjing, 210014, P.R. China
| | - Xin Sun
- College of Horticulture, Nanjing Agricultural Univ., Tongwei Rd. 6, Nanjing, 210095, P.R. China
| | - Chen Wang
- College of Horticulture, Nanjing Agricultural Univ., Tongwei Rd. 6, Nanjing, 210095, P.R. China
| | - Jinggui Fang
- College of Horticulture, Nanjing Agricultural Univ., Tongwei Rd. 6, Nanjing, 210095, P.R. China
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176
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Liu Z, Xin M, Qin J, Peng H, Ni Z, Yao Y, Sun Q. Temporal transcriptome profiling reveals expression partitioning of homeologous genes contributing to heat and drought acclimation in wheat (Triticum aestivum L.). BMC PLANT BIOLOGY 2015; 15:152. [PMID: 26092253 PMCID: PMC4474349 DOI: 10.1186/s12870-015-0511-8] [Citation(s) in RCA: 231] [Impact Index Per Article: 25.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2014] [Accepted: 04/28/2015] [Indexed: 05/20/2023]
Abstract
BACKGROUND Hexaploid wheat (Triticum aestivum) is a globally important crop. Heat, drought and their combination dramatically reduce wheat yield and quality, but the molecular mechanisms underlying wheat tolerance to extreme environments, especially stress combination, are largely unknown. As an allohexaploid, wheat consists of three closely related subgenomes (A, B, and D), and was reported to show improved tolerance to stress conditions compared to tetraploid. But so far very little is known about how wheat coordinates the expression of homeologous genes to cope with various environmental constraints on the whole-genome level. RESULTS To explore the transcriptional response of wheat to the individual and combined stress, we performed high-throughput transcriptome sequencing of seedlings under normal condition and subjected to drought stress (DS), heat stress (HS) and their combination (HD) for 1 h and 6 h, and presented global gene expression reprograms in response to these three stresses. Gene Ontology (GO) enrichment analysis of DS, HS and HD responsive genes revealed an overlap and complexity of functional pathways between each other. Moreover, 4,375 wheat transcription factors were identified on a whole-genome scale based on the released scaffold information by IWGSC, and 1,328 were responsive to stress treatments. Then, the regulatory network analysis of HSFs and DREBs implicated they were both involved in the regulation of DS, HS and HD response and indicated a cross-talk between heat and drought stress. Finally, approximately 68.4 % of homeologous genes were found to exhibit expression partitioning in response to DS, HS or HD, which was further confirmed by using quantitative RT-PCR and Nullisomic-Tetrasomic lines. CONCLUSIONS A large proportion of wheat homeologs exhibited expression partitioning under normal and abiotic stresses, which possibly contributes to the wide adaptability and distribution of hexaploid wheat in response to various environmental constraints.
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Affiliation(s)
- Zhenshan Liu
- State Key Laboratory for Agrobiotechnology, Key Laboratory of Crop Heterosis Utilization (MOE), Beijing Key Laboratory of Crop Genetic Improvement, China Agricultural University, NO.2 Yuanmingyuan Xi Road, Beijing, Haidian District, 100193, China.
| | - Mingming Xin
- State Key Laboratory for Agrobiotechnology, Key Laboratory of Crop Heterosis Utilization (MOE), Beijing Key Laboratory of Crop Genetic Improvement, China Agricultural University, NO.2 Yuanmingyuan Xi Road, Beijing, Haidian District, 100193, China.
| | - Jinxia Qin
- State Key Laboratory for Agrobiotechnology, Key Laboratory of Crop Heterosis Utilization (MOE), Beijing Key Laboratory of Crop Genetic Improvement, China Agricultural University, NO.2 Yuanmingyuan Xi Road, Beijing, Haidian District, 100193, China.
| | - Huiru Peng
- State Key Laboratory for Agrobiotechnology, Key Laboratory of Crop Heterosis Utilization (MOE), Beijing Key Laboratory of Crop Genetic Improvement, China Agricultural University, NO.2 Yuanmingyuan Xi Road, Beijing, Haidian District, 100193, China.
| | - Zhongfu Ni
- State Key Laboratory for Agrobiotechnology, Key Laboratory of Crop Heterosis Utilization (MOE), Beijing Key Laboratory of Crop Genetic Improvement, China Agricultural University, NO.2 Yuanmingyuan Xi Road, Beijing, Haidian District, 100193, China.
| | - Yingyin Yao
- State Key Laboratory for Agrobiotechnology, Key Laboratory of Crop Heterosis Utilization (MOE), Beijing Key Laboratory of Crop Genetic Improvement, China Agricultural University, NO.2 Yuanmingyuan Xi Road, Beijing, Haidian District, 100193, China.
| | - Qixin Sun
- State Key Laboratory for Agrobiotechnology, Key Laboratory of Crop Heterosis Utilization (MOE), Beijing Key Laboratory of Crop Genetic Improvement, China Agricultural University, NO.2 Yuanmingyuan Xi Road, Beijing, Haidian District, 100193, China.
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177
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Hossain MA, Bhattacharjee S, Armin SM, Qian P, Xin W, Li HY, Burritt DJ, Fujita M, Tran LSP. Hydrogen peroxide priming modulates abiotic oxidative stress tolerance: insights from ROS detoxification and scavenging. FRONTIERS IN PLANT SCIENCE 2015; 6:420. [PMID: 26136756 PMCID: PMC4468828 DOI: 10.3389/fpls.2015.00420] [Citation(s) in RCA: 327] [Impact Index Per Article: 36.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2015] [Accepted: 05/25/2015] [Indexed: 05/08/2023]
Abstract
Plants are constantly challenged by various abiotic stresses that negatively affect growth and productivity worldwide. During the course of their evolution, plants have developed sophisticated mechanisms to recognize external signals allowing them to respond appropriately to environmental conditions, although the degree of adjustability or tolerance to specific stresses differs from species to species. Overproduction of reactive oxygen species (ROS; hydrogen peroxide, H2O2; superoxide, [Formula: see text]; hydroxyl radical, OH(⋅) and singlet oxygen, (1)O2) is enhanced under abiotic and/or biotic stresses, which can cause oxidative damage to plant macromolecules and cell structures, leading to inhibition of plant growth and development, or to death. Among the various ROS, freely diffusible and relatively long-lived H2O2 acts as a central player in stress signal transduction pathways. These pathways can then activate multiple acclamatory responses that reinforce resistance to various abiotic and biotic stressors. To utilize H2O2 as a signaling molecule, non-toxic levels must be maintained in a delicate balancing act between H2O2 production and scavenging. Several recent studies have demonstrated that the H2O2-priming can enhance abiotic stress tolerance by modulating ROS detoxification and by regulating multiple stress-responsive pathways and gene expression. Despite the importance of the H2O2-priming, little is known about how this process improves the tolerance of plants to stress. Understanding the mechanisms of H2O2-priming-induced abiotic stress tolerance will be valuable for identifying biotechnological strategies to improve abiotic stress tolerance in crop plants. This review is an overview of our current knowledge of the possible mechanisms associated with H2O2-induced abiotic oxidative stress tolerance in plants, with special reference to antioxidant metabolism.
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Affiliation(s)
- Mohammad A. Hossain
- Department of Genetics and Plant Breeding, Bangladesh Agricultural UniversityMymensingh, Bangladesh
| | | | - Saed-Moucheshi Armin
- Department of Crop Production and Plant Breeding, College of Agriculture, Shiraz UniversityShiraz, Iran
| | - Pingping Qian
- Department of Biological Science, Graduate School of Science, Osaka UniversityToyonaka, Japan
| | - Wang Xin
- School of Pharmacy, Lanzhou UniversityLanzhou, China
| | - Hong-Yu Li
- Gansu Key Laboratory of Biomonitoring and Bioremediation for Environmental Pollution, School of Life Sciences, Lanzhou UniversityLanzhou, China
| | | | - Masayuki Fujita
- Laboratory of Plant Stress Responses, Faculty of Agriculture, Kagawa UniversityTakamatsu, Japan
| | - Lam-Son P. Tran
- Signaling Pathway Research Unit, RIKEN Center for Sustainable Resource ScienceYokohama, Japan
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178
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Munekage YN, Inoue S, Yoneda Y, Yokota A. Distinct palisade tissue development processes promoted by leaf autonomous signalling and long-distance signalling in Arabidopsis thaliana. PLANT, CELL & ENVIRONMENT 2015; 38:1116-26. [PMID: 25293694 DOI: 10.1111/pce.12466] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2014] [Revised: 10/01/2014] [Accepted: 10/01/2014] [Indexed: 05/23/2023]
Abstract
Plants develop palisade tissue consisting of cylindrical mesophyll cells located at the adaxial side of leaves in response to high light. To understand high light signalling in palisade tissue development, we investigated leaf autonomous and long-distance signal responses of palisade tissue development using Arabidopsis thaliana. Illumination of a developing leaf with high light induced cell height elongation, whereas illumination of mature leaves with high light increased cell density and suppressed cell width expansion in palisade tissue of new leaves. Examination using phototropin1 phototropin2 showed that blue light signalling mediated by phototropins was involved in cell height elongation of the leaf autonomous response rather than the cell density increase induced by long-distance signalling. Hydrogen peroxide treatment induced cylindrical palisade tissue cell formation in both a leaf autonomous and long-distance manner, suggesting involvement of oxidative signals. Although constitutive expression of transcription factors involved in systemic-acquired acclimation to excess light, ZAT10 and ZAT12, induced cylindrical palisade tissue cell formation, knockout of these genes did not affect cylindrical palisade tissue cell formation. We conclude that two distinct signalling pathways - leaf autonomous signalling mostly dependent on blue light signalling and long-distance signalling from mature leaves that sense high light and oxidative stress - control palisade tissue development in A. thaliana.
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Affiliation(s)
- Yuri Nakajima Munekage
- Graduate School of Biological Sciences, Nara Institute of Science and Technology, Ikoma, Nara, 630-0192, Japan
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179
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Patel M, Milla-Lewis S, Zhang W, Templeton K, Reynolds WC, Richardson K, Biswas M, Zuleta MC, Dewey RE, Qu R, Sathish P. Overexpression of ubiquitin-like LpHUB1 gene confers drought tolerance in perennial ryegrass. PLANT BIOTECHNOLOGY JOURNAL 2015; 13:689-699. [PMID: 25487628 DOI: 10.1111/pbi.12291] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2014] [Revised: 10/08/2014] [Accepted: 10/10/2014] [Indexed: 06/04/2023]
Abstract
HUB1, also known as Ubl5, is a member of the subfamily of ubiquitin-like post-translational modifiers. HUB1 exerts its role by conjugating with protein targets. The function of this protein has not been studied in plants. A HUB1 gene, LpHUB1, was identified from serial analysis of gene expression data and cloned from perennial ryegrass. The expression of this gene was reported previously to be elevated in pastures during the summer and by drought stress in climate-controlled growth chambers. Here, pasture-type and turf-type transgenic perennial ryegrass plants overexpressing LpHUB1 showed improved drought tolerance, as evidenced by improved turf quality, maintenance of turgor and increased growth. Additional analyses revealed that the transgenic plants generally displayed higher relative water content, leaf water potential, and chlorophyll content and increased photosynthetic rate when subjected to drought stress. These results suggest HUB1 may play an important role in the tolerance of perennial ryegrass to abiotic stresses.
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Affiliation(s)
- Minesh Patel
- Department of Crop Science, North Carolina State University, Raleigh, NC, USA
| | - Susana Milla-Lewis
- Department of Crop Science, North Carolina State University, Raleigh, NC, USA
| | - Wanjun Zhang
- Department of Crop Science, North Carolina State University, Raleigh, NC, USA
| | - Kerry Templeton
- Pastoral Genomics, c/o ViaLactia Biosciences (NZ) Ltd/Fonterra, Auckland, New Zealand
| | - William C Reynolds
- Department of Crop Science, North Carolina State University, Raleigh, NC, USA
| | - Kim Richardson
- AgResearch Ltd, Grasslands Research Centre, Palmerston North, New Zealand
| | - Margaret Biswas
- Pastoral Genomics, c/o ViaLactia Biosciences (NZ) Ltd/Fonterra, Auckland, New Zealand
| | - Maria C Zuleta
- Department of Crop Science, North Carolina State University, Raleigh, NC, USA
| | - Ralph E Dewey
- Department of Crop Science, North Carolina State University, Raleigh, NC, USA
| | - Rongda Qu
- Department of Crop Science, North Carolina State University, Raleigh, NC, USA
| | - Puthigae Sathish
- Pastoral Genomics, c/o ViaLactia Biosciences (NZ) Ltd/Fonterra, Auckland, New Zealand
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180
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Liu Y, Xia W, Yang P, Zhang S, Shi Z, Tang H, Zhang L. Cloning and expression of fumarylacetoacetate hydrolase derived from marine yeastRhodosporidium diobovatum. J Basic Microbiol 2015; 55:1082-93. [DOI: 10.1002/jobm.201400908] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2014] [Accepted: 03/13/2015] [Indexed: 11/09/2022]
Affiliation(s)
- Yuxuan Liu
- Key Laboratory of Microbial Diversity Research and Application of Hebei Province; Key Discipline of Biological Engineering of Hebei Province; College of Life Sciences; Hebei University; Baoding 071002 China
| | - Weiwei Xia
- Key Laboratory of Microbial Diversity Research and Application of Hebei Province; Key Discipline of Biological Engineering of Hebei Province; College of Life Sciences; Hebei University; Baoding 071002 China
| | - Pucheng Yang
- Key Laboratory of Microbial Diversity Research and Application of Hebei Province; Key Discipline of Biological Engineering of Hebei Province; College of Life Sciences; Hebei University; Baoding 071002 China
| | - Shuo Zhang
- Key Laboratory of Microbial Diversity Research and Application of Hebei Province; Key Discipline of Biological Engineering of Hebei Province; College of Life Sciences; Hebei University; Baoding 071002 China
| | - Zhihui Shi
- Key Laboratory of Microbial Diversity Research and Application of Hebei Province; Key Discipline of Biological Engineering of Hebei Province; College of Life Sciences; Hebei University; Baoding 071002 China
| | - Hui Tang
- Key Laboratory of Microbial Diversity Research and Application of Hebei Province; Key Discipline of Biological Engineering of Hebei Province; College of Life Sciences; Hebei University; Baoding 071002 China
| | - Liping Zhang
- Key Laboratory of Microbial Diversity Research and Application of Hebei Province; Key Discipline of Biological Engineering of Hebei Province; College of Life Sciences; Hebei University; Baoding 071002 China
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181
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Aversano R, Contaldi F, Ercolano MR, Grosso V, Iorizzo M, Tatino F, Xumerle L, Dal Molin A, Avanzato C, Ferrarini A, Delledonne M, Sanseverino W, Cigliano RA, Capella-Gutierrez S, Gabaldón T, Frusciante L, Bradeen JM, Carputo D. The Solanum commersonii Genome Sequence Provides Insights into Adaptation to Stress Conditions and Genome Evolution of Wild Potato Relatives. THE PLANT CELL 2015; 27:954-68. [PMID: 25873387 PMCID: PMC4558694 DOI: 10.1105/tpc.114.135954] [Citation(s) in RCA: 85] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/24/2014] [Accepted: 04/01/2015] [Indexed: 05/02/2023]
Abstract
Here, we report the draft genome sequence of Solanum commersonii, which consists of ∼830 megabases with an N50 of 44,303 bp anchored to 12 chromosomes, using the potato (Solanum tuberosum) genome sequence as a reference. Compared with potato, S. commersonii shows a striking reduction in heterozygosity (1.5% versus 53 to 59%), and differences in genome sizes were mainly due to variations in intergenic sequence length. Gene annotation by ab initio prediction supported by RNA-seq data produced a catalog of 1703 predicted microRNAs, 18,882 long noncoding RNAs of which 20% are shown to target cold-responsive genes, and 39,290 protein-coding genes with a significant repertoire of nonredundant nucleotide binding site-encoding genes and 126 cold-related genes that are lacking in S. tuberosum. Phylogenetic analyses indicate that domesticated potato and S. commersonii lineages diverged ∼2.3 million years ago. Three duplication periods corresponding to genome enrichment for particular gene families related to response to salt stress, water transport, growth, and defense response were discovered. The draft genome sequence of S. commersonii substantially increases our understanding of the domesticated germplasm, facilitating translation of acquired knowledge into advances in crop stability in light of global climate and environmental changes.
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Affiliation(s)
- Riccardo Aversano
- Department of Agricultural Sciences, University of Naples Federico II, 80055 Portici, Italy
| | - Felice Contaldi
- Department of Agricultural Sciences, University of Naples Federico II, 80055 Portici, Italy
| | | | - Valentina Grosso
- Department of Agricultural Sciences, University of Naples Federico II, 80055 Portici, Italy
| | - Massimo Iorizzo
- Department of Agricultural Sciences, University of Naples Federico II, 80055 Portici, Italy
| | - Filippo Tatino
- Department of Agricultural Sciences, University of Naples Federico II, 80055 Portici, Italy
| | - Luciano Xumerle
- Center of Functional Genomics, Department of Biotechnologies, University of Verona, 37134 Cà Vignal, Italy
| | - Alessandra Dal Molin
- Center of Functional Genomics, Department of Biotechnologies, University of Verona, 37134 Cà Vignal, Italy
| | - Carla Avanzato
- Center of Functional Genomics, Department of Biotechnologies, University of Verona, 37134 Cà Vignal, Italy
| | - Alberto Ferrarini
- Center of Functional Genomics, Department of Biotechnologies, University of Verona, 37134 Cà Vignal, Italy
| | - Massimo Delledonne
- Center of Functional Genomics, Department of Biotechnologies, University of Verona, 37134 Cà Vignal, Italy
| | | | | | - Salvador Capella-Gutierrez
- Center for Genomic Regulation, 08003 Barcelona, Spain Departament de Ciències Experimentals i de la Salut, Universitat Pompeu Fabra, 08003 Barcelona, Spain
| | - Toni Gabaldón
- Center for Genomic Regulation, 08003 Barcelona, Spain Departament de Ciències Experimentals i de la Salut, Universitat Pompeu Fabra, 08003 Barcelona, Spain Institució Catalana de Recerca i Estudis Avançats, 08010 Barcelona, Spain
| | - Luigi Frusciante
- Department of Agricultural Sciences, University of Naples Federico II, 80055 Portici, Italy
| | - James M Bradeen
- Department of Plant Pathology and Stakman-Borlaug Center for Sustainable Plant Health, University of Minnesota, Saint Paul, Minnesota 55108
| | - Domenico Carputo
- Department of Agricultural Sciences, University of Naples Federico II, 80055 Portici, Italy
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182
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Feng ZJ, Cui XY, Cui XY, Chen M, Yang GX, Ma YZ, He GY, Xu ZS. The soybean GmDi19-5 interacts with GmLEA3.1 and increases sensitivity of transgenic plants to abiotic stresses. FRONTIERS IN PLANT SCIENCE 2015; 6:179. [PMID: 25852726 PMCID: PMC4371698 DOI: 10.3389/fpls.2015.00179] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/11/2015] [Accepted: 03/05/2015] [Indexed: 05/29/2023]
Abstract
Drought-induced (Di19) proteins played important roles in plant growth, development, and abiotic stress responses. In the present study, a total of seven Di19 genes were identified in soybean. Each soybean Di19 gene showed specific responses to salt, drought, oxidative, and ABA stresses based on expression profiles. With a relatively higher transcript level among Di19 members under four stress treatments, GmDi19-5 was selected for detailed analysis. Inhibitor assays revealed that ABA inhibitor (Fluridone) or H2O2 inhibitor (DMTU) was involved in the drought- or salt-induced transcription of GmDi19-5. The GUS activity driven by the GmDi19-5 promoter was induced by salt, PEG, ABA, and MV treatments and tended to be accumulated in the vascular bundles and young leaves. A subcellular localization assay showed that GmDi19-5 protein localized in the nucleus. Further investigation showed that GmDi19-5 protein was involved in the interaction with GmLEA3.1. Overexpression of GmDi19-5 increased sensitivity of transgenic Arabidopsis plants to salt, drought, oxidative, and ABA stresses and regulated expression of several ABA/stress-associated genes. This present investigation showed that GmDi19-5 functioned as a negative factor under abiotic stresses and was involved in ABA and SOS signaling pathway by altering transcription of stress-associated genes.
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Affiliation(s)
- Zhi-Juan Feng
- The Genetic Engineering International Cooperation Base of Chinese Ministry of Science and Technology, Key Laboratory of Molecular Biophysics of Chinese Ministry of Education, College of Life Science and Technology, Huazhong University of Science and TechnologyWuhan, China
- Institute of Crop Science, Chinese Academy of Agricultural Sciences/National Key Facility for Crop Gene Resources and Genetic Improvement, Key Laboratory of Biology and Genetic Improvement of Triticeae Crops, Ministry of AgricultureBeijing, China
| | - Xiao-Yu Cui
- Institute of Crop Science, Chinese Academy of Agricultural Sciences/National Key Facility for Crop Gene Resources and Genetic Improvement, Key Laboratory of Biology and Genetic Improvement of Triticeae Crops, Ministry of AgricultureBeijing, China
| | - Xi-Yan Cui
- College of Life Sciences, Jilin Agricultural UniversityChangchun, China
| | - Ming Chen
- Institute of Crop Science, Chinese Academy of Agricultural Sciences/National Key Facility for Crop Gene Resources and Genetic Improvement, Key Laboratory of Biology and Genetic Improvement of Triticeae Crops, Ministry of AgricultureBeijing, China
| | - Guang-Xiao Yang
- The Genetic Engineering International Cooperation Base of Chinese Ministry of Science and Technology, Key Laboratory of Molecular Biophysics of Chinese Ministry of Education, College of Life Science and Technology, Huazhong University of Science and TechnologyWuhan, China
| | - You-Zhi Ma
- Institute of Crop Science, Chinese Academy of Agricultural Sciences/National Key Facility for Crop Gene Resources and Genetic Improvement, Key Laboratory of Biology and Genetic Improvement of Triticeae Crops, Ministry of AgricultureBeijing, China
| | - Guang-Yuan He
- The Genetic Engineering International Cooperation Base of Chinese Ministry of Science and Technology, Key Laboratory of Molecular Biophysics of Chinese Ministry of Education, College of Life Science and Technology, Huazhong University of Science and TechnologyWuhan, China
| | - Zhao-Shi Xu
- Institute of Crop Science, Chinese Academy of Agricultural Sciences/National Key Facility for Crop Gene Resources and Genetic Improvement, Key Laboratory of Biology and Genetic Improvement of Triticeae Crops, Ministry of AgricultureBeijing, China
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183
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Weng L, Zhao F, Li R, Xu C, Chen K, Xiao H. The zinc finger transcription factor SlZFP2 negatively regulates abscisic acid biosynthesis and fruit ripening in tomato. PLANT PHYSIOLOGY 2015; 167:931-49. [PMID: 25637453 PMCID: PMC4348780 DOI: 10.1104/pp.114.255174] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2014] [Accepted: 01/26/2015] [Indexed: 05/18/2023]
Abstract
Abscisic acid (ABA) regulates plant development and adaptation to environmental conditions. Although the ABA biosynthesis pathway in plants has been thoroughly elucidated, how ABA biosynthetic genes are regulated at the molecular level during plant development is less well understood. Here, we show that the tomato (Solanum lycopersicum) zinc finger transcription factor SlZFP2 is involved in the regulation of ABA biosynthesis during fruit development. Overexpression of SlZFP2 resulted in multiple phenotypic changes, including more branches, early flowering, delayed fruit ripening, lighter seeds, and faster seed germination, whereas down-regulation of its expression caused problematic fruit set, accelerated ripening, and inhibited seed germination. SlZFP2 represses ABA biosynthesis during fruit development through direct suppression of the ABA biosynthetic genes NOTABILIS, SITIENS, and FLACCA and the aldehyde oxidase SlAO1. We also show that SlZFP2 regulates fruit ripening through transcriptional suppression of the ripening regulator COLORLESS NON-RIPENING. Using bacterial one-hybrid screening and a selected amplification and binding assay, we identified the (A/T)(G/C)TT motif as the core binding sequence of SlZFP2. Furthermore, by RNA sequencing profiling, we found that 193 genes containing the SlZFP2-binding motifs in their promoters were differentially expressed in 2 d post anthesis fruits between the SlZFP2 RNA interference line and its nontransgenic sibling. We propose that SlZFP2 functions as a repressor to fine-tune ABA biosynthesis during fruit development and provides a potentially valuable tool for dissecting the role of ABA in fruit ripening.
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Affiliation(s)
- Lin Weng
- National Key Laboratory of Plant Molecular Genetics, Institute of Plant Physiology and Ecology, Shanghai Institute for Biological Sciences, Chinese Academy of Sciences, Shanghai 200032, China (L.W., F.Z., R.L., H.X.); andFruit Science Institute, Zhejiang University, Hangzhou 310058, China (C.X., K.C.)
| | - Fangfang Zhao
- National Key Laboratory of Plant Molecular Genetics, Institute of Plant Physiology and Ecology, Shanghai Institute for Biological Sciences, Chinese Academy of Sciences, Shanghai 200032, China (L.W., F.Z., R.L., H.X.); andFruit Science Institute, Zhejiang University, Hangzhou 310058, China (C.X., K.C.)
| | - Rong Li
- National Key Laboratory of Plant Molecular Genetics, Institute of Plant Physiology and Ecology, Shanghai Institute for Biological Sciences, Chinese Academy of Sciences, Shanghai 200032, China (L.W., F.Z., R.L., H.X.); andFruit Science Institute, Zhejiang University, Hangzhou 310058, China (C.X., K.C.)
| | - Changjie Xu
- National Key Laboratory of Plant Molecular Genetics, Institute of Plant Physiology and Ecology, Shanghai Institute for Biological Sciences, Chinese Academy of Sciences, Shanghai 200032, China (L.W., F.Z., R.L., H.X.); andFruit Science Institute, Zhejiang University, Hangzhou 310058, China (C.X., K.C.)
| | - Kunsong Chen
- National Key Laboratory of Plant Molecular Genetics, Institute of Plant Physiology and Ecology, Shanghai Institute for Biological Sciences, Chinese Academy of Sciences, Shanghai 200032, China (L.W., F.Z., R.L., H.X.); andFruit Science Institute, Zhejiang University, Hangzhou 310058, China (C.X., K.C.)
| | - Han Xiao
- National Key Laboratory of Plant Molecular Genetics, Institute of Plant Physiology and Ecology, Shanghai Institute for Biological Sciences, Chinese Academy of Sciences, Shanghai 200032, China (L.W., F.Z., R.L., H.X.); andFruit Science Institute, Zhejiang University, Hangzhou 310058, China (C.X., K.C.)
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184
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Øverby A, Bævre MS, Thangstad OP, Bones AM. Disintegration of microtubules in Arabidopsis thaliana and bladder cancer cells by isothiocyanates. FRONTIERS IN PLANT SCIENCE 2015; 6:6. [PMID: 25657654 PMCID: PMC4303138 DOI: 10.3389/fpls.2015.00006] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2014] [Accepted: 01/05/2015] [Indexed: 05/08/2023]
Abstract
Isothiocyanates (ITCs) from biodegradation of glucosinolates comprise a group of electrophiles associated with growth-inhibitory effects in plant- and mammalian cells. The underlying modes of action of this feature are not fully understood. Clarifying this has involved mammalian cancer cells due to ITCs' chemopreventive potential. The binding of ITCs to tubulins has been reported as a mechanism by which ITCs induce cell cycle arrest and apoptosis. In the present study we demonstrate that ITCs disrupt microtubules in Arabidopsis thaliana contributing to the observed inhibited growth phenotype. We also confirmed this in rat bladder cancer cells (AY-27) suggesting that cells from plant and animals share mechanisms by which ITCs affect growth. Exposure of A. thaliana to vapor-phase of allyl ITC (AITC) inhibited growth and induced a concurrent bleaching of leaves in a dose-dependent manner. Transcriptional analysis was used to show an upregulation of heat shock-genes upon AITC-treatment. Transgenic A. thaliana expressing GFP-marked α-tubulin was employed to show a time- and dose-dependent disintegration of microtubules by AITC. Treatment of AY-27 with ITCs resulted in a time- and dose-dependent decrease of cell proliferation and G2/M-arrest. AY-27 transiently transfected to express GFP-tagged α-tubulin were treated with ITCs resulting in a loss of microtubular filaments and the subsequent formation of apoptotic bodies. In conclusion, our data demonstrate an ITC-induced mechanism leading to growth inhibition in A. thaliana and rat bladder cancer cells, and expose clues to the mechanisms underlying the physiological role of glucosinolates in vivo.
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Affiliation(s)
- Anders Øverby
- *Correspondence: Anders Øverby and Atle M. Bones, Department of Biology, Norwegian University of Science and Technology (NTNU), Høgskoleringen 5, N-7491 Trondheim, Norway e-mail: ;
| | | | | | - Atle M. Bones
- *Correspondence: Anders Øverby and Atle M. Bones, Department of Biology, Norwegian University of Science and Technology (NTNU), Høgskoleringen 5, N-7491 Trondheim, Norway e-mail: ;
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185
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Howe GT, Horvath DP, Dharmawardhana P, Priest HD, Mockler TC, Strauss SH. Extensive Transcriptome Changes During Natural Onset and Release of Vegetative Bud Dormancy in Populus. FRONTIERS IN PLANT SCIENCE 2015; 6:989. [PMID: 26734012 PMCID: PMC4681841 DOI: 10.3389/fpls.2015.00989] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2014] [Accepted: 10/29/2015] [Indexed: 05/19/2023]
Abstract
To survive winter, many perennial plants become endodormant, a state of suspended growth maintained even in favorable growing environments. To understand vegetative bud endodormancy, we collected paradormant, endodormant, and ecodormant axillary buds from Populus trees growing under natural conditions. Of 44,441 Populus gene models analyzed using NimbleGen microarrays, we found that 1,362 (3.1%) were differentially expressed among the three dormancy states, and 429 (1.0%) were differentially expressed during only one of the two dormancy transitions (FDR p-value < 0.05). Of all differentially expressed genes, 69% were down-regulated from paradormancy to endodormancy, which was expected given the lower metabolic activity associated with endodormancy. Dormancy transitions were accompanied by changes in genes associated with DNA methylation (via RNA-directed DNA methylation) and histone modifications (via Polycomb Repressive Complex 2), confirming and extending knowledge of chromatin modifications as major features of dormancy transitions. Among the chromatin-associated genes, two genes similar to SPT (SUPPRESSOR OF TY) were strongly up-regulated during endodormancy. Transcription factor genes and gene sets that were atypically up-regulated during endodormancy include a gene that seems to encode a trihelix transcription factor and genes associated with proteins involved in responses to ethylene, cold, and other abiotic stresses. These latter transcription factors include ETHYLENE INSENSITIVE 3 (EIN3), ETHYLENE-RESPONSIVE ELEMENT BINDING PROTEIN (EBP), ETHYLENE RESPONSE FACTOR (ERF), ZINC FINGER PROTEIN 10 (ZAT10), ZAT12, and WRKY DNA-binding domain proteins. Analyses of phytohormone-associated genes suggest important changes in responses to ethylene, auxin, and brassinosteroids occur during endodormancy. We found weaker evidence for changes in genes associated with salicylic acid and jasmonic acid, and little evidence for important changes in genes associated with gibberellins, abscisic acid, and cytokinin. We identified 315 upstream sequence motifs associated with eight patterns of gene expression, including novel motifs and motifs associated with the circadian clock and responses to photoperiod, cold, dehydration, and ABA. Analogies between flowering and endodormancy suggest important roles for genes similar to SQUAMOSA-PROMOTER BINDING PROTEIN-LIKE (SPL), DORMANCY ASSOCIATED MADS-BOX (DAM), and SUPPRESSOR OF OVEREXPRESSION OF CONSTANS 1 (SOC1).
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Affiliation(s)
- Glenn T. Howe
- Department of Forest Ecosystems and Society, Oregon State UniversityCorvallis, OR, USA
| | - David P. Horvath
- Biosciences Research Laboratory, United States Department of Agriculture-Agricultural Research ServiceFargo, ND, USA
| | - Palitha Dharmawardhana
- Department of Forest Ecosystems and Society, Oregon State UniversityCorvallis, OR, USA
- Department of Botany and Plant Pathology, Oregon State UniversityCorvallis, OR, USA
| | - Henry D. Priest
- Donald Danforth Plant Science CenterSaint Louis, MO, USA
- Division of Biology and Biomedical Sciences, Washington University in Saint LouisSaint Louis, MO, USA
| | - Todd C. Mockler
- Department of Botany and Plant Pathology, Oregon State UniversityCorvallis, OR, USA
- Donald Danforth Plant Science CenterSaint Louis, MO, USA
| | - Steven H. Strauss
- Department of Forest Ecosystems and Society, Oregon State UniversityCorvallis, OR, USA
- *Correspondence: Steven H. Strauss,
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Mata-Pérez C, Sánchez-Calvo B, Begara-Morales JC, Luque F, Jiménez-Ruiz J, Padilla MN, Fierro-Risco J, Valderrama R, Fernández-Ocaña A, Corpas FJ, Barroso JB. Transcriptomic profiling of linolenic acid-responsive genes in ROS signaling from RNA-seq data in Arabidopsis. FRONTIERS IN PLANT SCIENCE 2015; 6:122. [PMID: 25852698 PMCID: PMC4362301 DOI: 10.3389/fpls.2015.00122] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2014] [Accepted: 02/14/2015] [Indexed: 05/20/2023]
Abstract
Linolenic acid (Ln) released from chloroplast membrane galactolipids is a precursor of the phytohormone jasmonic acid (JA). The involvement of this hormone in different plant biological processes, such as responses to biotic stress conditions, has been extensively studied. However, the role of Ln in the regulation of gene expression during abiotic stress situations mediated by cellular redox changes and/or by oxidative stress processes remains poorly understood. An RNA-seq approach has increased our knowledge of the interplay among Ln, oxidative stress and ROS signaling that mediates abiotic stress conditions. Transcriptome analysis with the aid of RNA-seq in the absence of oxidative stress revealed that the incubation of Arabidopsis thaliana cell suspension cultures (ACSC) with Ln resulted in the modulation of 7525 genes, of which 3034 genes had a 2-fold-change, being 533 up- and 2501 down-regulated genes, respectively. Thus, RNA-seq data analysis showed that an important set of these genes were associated with the jasmonic acid biosynthetic pathway including lypoxygenases (LOXs) and Allene oxide cyclases (AOCs). In addition, several transcription factor families involved in the response to biotic stress conditions (pathogen attacks or herbivore feeding), such as WRKY, JAZ, MYC, and LRR were also modified in response to Ln. However, this study also shows that Ln has the capacity to modulate the expression of genes involved in the response to abiotic stress conditions, particularly those mediated by ROS signaling. In this regard, we were able to identify new targets such as galactinol synthase 1 (GOLS1), methionine sulfoxide reductase (MSR) and alkenal reductase in ACSC. It is therefore possible to suggest that, in the absence of any oxidative stress, Ln is capable of modulating new sets of genes involved in the signaling mechanism mediated by additional abiotic stresses (salinity, UV and high light intensity) and especially in stresses mediated by ROS.
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Affiliation(s)
- Capilla Mata-Pérez
- Group of Biochemistry and Cell Signaling in Nitric Oxide, Department of Experimental Biology, Area of Biochemistry and Molecular Biology, University of JaénJaén, Spain
| | - Beatriz Sánchez-Calvo
- Group of Biochemistry and Cell Signaling in Nitric Oxide, Department of Experimental Biology, Area of Biochemistry and Molecular Biology, University of JaénJaén, Spain
| | - Juan C. Begara-Morales
- Group of Biochemistry and Cell Signaling in Nitric Oxide, Department of Experimental Biology, Area of Biochemistry and Molecular Biology, University of JaénJaén, Spain
| | - Francisco Luque
- Department of Experimental Biology, Center for Advanced Studies in Olive Grove and Olive Oils, University of JaénJaén, Spain
| | - Jaime Jiménez-Ruiz
- Group of Biochemistry and Cell Signaling in Nitric Oxide, Department of Experimental Biology, Area of Biochemistry and Molecular Biology, University of JaénJaén, Spain
| | - María N. Padilla
- Group of Biochemistry and Cell Signaling in Nitric Oxide, Department of Experimental Biology, Area of Biochemistry and Molecular Biology, University of JaénJaén, Spain
| | - Jesús Fierro-Risco
- Group of Biochemistry and Cell Signaling in Nitric Oxide, Department of Experimental Biology, Area of Biochemistry and Molecular Biology, University of JaénJaén, Spain
| | - Raquel Valderrama
- Group of Biochemistry and Cell Signaling in Nitric Oxide, Department of Experimental Biology, Area of Biochemistry and Molecular Biology, University of JaénJaén, Spain
| | - Ana Fernández-Ocaña
- Group of Biochemistry and Cell Signaling in Nitric Oxide, Department of Experimental Biology, Area of Biochemistry and Molecular Biology, University of JaénJaén, Spain
| | - Francisco J. Corpas
- Group of Antioxidants, Free Radicals and Nitric Oxide in Biotechnology, Food and Agriculture, Department of Biochemistry, Cellular and Molecular Biology of Plants, Estación Experimental del Zaidín, Consejo Superior de Investigaciones CientíficasGranada, Spain
| | - Juan B. Barroso
- Group of Biochemistry and Cell Signaling in Nitric Oxide, Department of Experimental Biology, Area of Biochemistry and Molecular Biology, University of JaénJaén, Spain
- Department of Experimental Biology, Center for Advanced Studies in Olive Grove and Olive Oils, University of JaénJaén, Spain
- *Correspondence: Juan B. Barroso, Department of Experimental Biology, Area of Biochemistry and Molecular Biology, University of Jaén, Campus Las Lagunillas s/n, Jaén 23071, Spain e-mail:
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Thirunavukkarasu N, Hossain F, Arora K, Sharma R, Shiriga K, Mittal S, Mohan S, Namratha PM, Dogga S, Rani TS, Katragadda S, Rathore A, Shah T, Mohapatra T, Gupta HS. Functional mechanisms of drought tolerance in subtropical maize (Zea mays L.) identified using genome-wide association mapping. BMC Genomics 2014; 15:1182. [PMID: 25539911 PMCID: PMC4367829 DOI: 10.1186/1471-2164-15-1182] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2014] [Accepted: 12/16/2014] [Indexed: 01/25/2023] Open
Abstract
Background Earlier studies were focused on the genetics of temperate and tropical maize under drought. We identified genetic loci and their association with functional mechanisms in 240 accessions of subtropical maize using a high-density marker set under water stress. Results Out of 61 significant SNPs (11 were false-discovery-rate-corrected associations), identified across agronomic traits, models, and locations by subjecting the accessions to water stress at flowering stage, 48% were associated with drought-tolerant genes. Maize gene models revealed that SNPs mapped for agronomic traits were in fact associated with number of functional traits as follows: stomatal closure, 28; flowering, 15; root development, 5; detoxification, 4; and reduced water potential, 2. Interactions of these SNPS through the functional traits could lead to drought tolerance. The SNPs associated with ABA-dependent signalling pathways played a major role in the plant’s response to stress by regulating a series of functions including flowering, root development, auxin metabolism, guard cell functions, and scavenging reactive oxygen species (ROS). ABA signalling genes regulate flowering through epigenetic changes in stress-responsive genes. ROS generated by ABA signalling are reduced by the interplay between ethylene, ABA, and detoxification signalling transductions. Integration of ABA-signalling genes with auxin-inducible genes regulates root development which in turn, maintains the water balance by regulating electrochemical gradient in plant. Conclusions Several genes are directly or indirectly involved in the functioning of agronomic traits related to water stress. Genes involved in these crucial biological functions interacted significantly in order to maintain the primary as well as exclusive functions related to coping with water stress. SNPs associated with drought-tolerant genes involved in strategic biological functions will be useful to understand the mechanisms of drought tolerance in subtropical maize. Electronic supplementary material The online version of this article (doi:10.1186/1471-2164-15-1182) contains supplementary material, which is available to authorized users.
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188
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Deng X, Yang J, Wu X, Li Y, Fei X. A C2H2 zinc finger protein FEMU2 is required for fox1 expression in Chlamydomonas reinhardtii. PLoS One 2014; 9:e112977. [PMID: 25485540 PMCID: PMC4259311 DOI: 10.1371/journal.pone.0112977] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2014] [Accepted: 10/17/2014] [Indexed: 02/01/2023] Open
Abstract
Chlamydomonas reinhardtii fox1 gene encodes a ferroxidase that is involved in cellular Fe uptake and highly induced during Fe deficient conditions. In an effort to identify fox1 promoter regulatory elements, an insertional library was generated in a transgenic Chlamydomonas strain (2A38) harboring an arylsulfatase (ARS) reporter gene driven by the fox1 promoter. Mutants with a defective response to low iron conditions were selected for further study. Among these, a strain containing a disrupted femu2 gene was identified. Activation of the fox1 promoter by the femu2 gene product was confirmed by silencing the femu2 gene using RNA interference. In three femu2 RNAi transgenic lines (IR3, IR6, and IR7), ARS reporter gene activities declined by 84.3%, 86.4%, and 88.8%, respectively under Fe deficient conditions. Furthermore, RT-PCR analysis of both the femu2 mutant and the RNAi transgenic lines showed significantly decreased transcript abundance of the endogenous fox1 gene under Fe deficient conditions. Amino acid sequence analysis of the femu2 gene product identified three potential C2H2 zinc finger (ZF) motifs and a nuclear localization study suggests that FEMU2 is localized to the nucleus. In addition, a potential FEMU2 binding site ((G/T)TTGG(G/T)(G/T)T) was identified using PCR-mediated random binding site selection. Taken together, this evidence suggests that FEMU2 is involved in up-regulation of the fox1 gene in Fe deficient cells.
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Affiliation(s)
- Xiaodong Deng
- Key Laboratory of Biology and Genetic Resources of Tropical Crops, Ministry of Agriculture, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Science, Haikou, 571101, China
| | - Jinghao Yang
- Key Laboratory of Biology and Genetic Resources of Tropical Crops, Ministry of Agriculture, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Science, Haikou, 571101, China
| | - Xiaoxia Wu
- Key Laboratory of Biology and Genetic Resources of Tropical Crops, Ministry of Agriculture, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Science, Haikou, 571101, China
| | - YaJun Li
- Key Laboratory of Biology and Genetic Resources of Tropical Crops, Ministry of Agriculture, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Science, Haikou, 571101, China
| | - Xiaowen Fei
- School of Science, Hainan Medical College, Haikou, 571101, China
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189
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Wang L, Yu C, Chen C, He C, Zhu Y, Huang W. Identification of rice Di19 family reveals OsDi19-4 involved in drought resistance. PLANT CELL REPORTS 2014; 33:2047-62. [PMID: 25236158 DOI: 10.1007/s00299-014-1679-3] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2014] [Revised: 08/09/2014] [Accepted: 08/24/2014] [Indexed: 05/04/2023]
Abstract
The OsDi19 proteins functioned as transcription factors and played crucial roles in response to abiotic stress. Overexpression of OsDi19-4 in rice increased drought tolerance by enhancing ROS-scavenging activity. Many transcription factors play crucial roles in plant responses to abiotic stress. Here, comprehensive sequence analysis suggested that the drought-induced 19 (Di19) gene family in rice genome contain seven members, and these proteins contained a well-conserved zinc-finger Di19 domain. Most OsDi19 proteins were mainly targeted to the nucleus and have transactivation activity in yeast. Yeast two-hybrid and bimolecular fluorescence complementation assays showed that most OsDi19 proteins could form protein dimers. Expression analysis demonstrated that the OsDi19 genes were differentially and abundantly expressed in vegetative tissues, but expressed little in reproductive tissues and some of the OsDi19 genes were markedly induced by abiotic stresses and hormones in qRT-PCR analysis and microarray data. Overexpression of one stress-responsive gene, OsDi19-4, in rice resulted in significantly increased tolerance to drought stress compared with the wild type plants. Moreover, obviously increased ROS-scavenging ability was detected in the OsDi19-4-overexpressing plants under normal and drought stress conditions. These results suggested that the increased stress tolerance of OsDi19-4-overexpressing plants may be attributable to the enhanced ROS-scavenging activity. Taken together, these studies provide a detailed overview of the rice Di19 gene family, and suggest that the OsDi19 family may play crucial roles in the plant response to abiotic stress.
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Affiliation(s)
- Lili Wang
- State Key Laboratory of Hybrid Rice, College of Life Sciences, Wuhan University, Wuhan, 430072, China
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190
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Liu XM, An J, Han HJ, Kim SH, Lim CO, Yun DJ, Chung WS. ZAT11, a zinc finger transcription factor, is a negative regulator of nickel ion tolerance in Arabidopsis. PLANT CELL REPORTS 2014; 33:2015-21. [PMID: 25163803 DOI: 10.1007/s00299-014-1675-7] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2014] [Revised: 08/12/2014] [Accepted: 08/18/2014] [Indexed: 05/26/2023]
Abstract
ZAT11, a Zinc Finger of Arabidopsis Thaliana 11, is a dual-function transcriptional regulator that positively regulates primary root growth but negatively regulates Ni (2+) tolerance. Zinc Finger of Arabidopsis Thaliana 11 (ZAT11) is a C2H2-type zinc finger protein that has been reported to function as an active transcriptional repressor. However, the biological function of ZAT11 remains unknown. Here we show that GFP-tagged ZAT11 is targeted to the nucleus. Analysis of plants expressing ZAT11 promoter-GUS showed that ZAT11 is highly expressed in roots and particularly in root tips. To identify the biological function of ZAT11, we constructed three independent lines of ZAT11 overexpressing transgenic plant (ZAT11 OE). ZAT11 OE enhanced the elongation of primary root but reduced the metal tolerance against nickel ion (Ni(2+)). The reduced Ni(2+) tolerance of ZAT11 OE was correlated with decreased accumulation of Ni(2+) in plants. The decreased accumulation of Ni(2+) in ZAT11 OE was caused by the reduced transcription of a vacuolar Ni(2+) transporter gene. Taken together, our results suggest that ZAT11 is a dual function transcriptional regulator that positively regulates primary root growth but negatively regulates Ni(2+) tolerance.
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Affiliation(s)
- Xiao-Min Liu
- Division of Applied Life Science (BK21Plus Program), Gyeongsang National University, Jinju, 660-701, Republic of Korea
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191
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Qin LX, Li Y, Li DD, Xu WL, Zheng Y, Li XB. Arabidopsis drought-induced protein Di19-3 participates in plant response to drought and high salinity stresses. PLANT MOLECULAR BIOLOGY 2014; 86:609-25. [PMID: 25218132 DOI: 10.1007/s11103-014-0251-4] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2014] [Accepted: 09/05/2014] [Indexed: 05/04/2023]
Abstract
Di19 (drought-induced protein19) family is a novel type of Cys2/His2 zinc-finger proteins. In this study, Arabidopsis Di19-3 was functionally characterized. The experimental results revealed that AtDi19-3 is a transcriptional activator, and could bind to the TACA(A/G)T sequence. AtDi19-3 expression in plants was remarkably induced by NaCl, mannitol and abscisic acid (ABA). T-DNA insertion mutation of AtDi19-3 results in an increase in plant tolerance to drought and high salinity stresses and ABA, whereas overexpression of AtDi19-3 leads to a drought-, salt- and ABA-sensitive phenotype of the transgenic plants. In the presence of NaCl, mannitol or ABA, rates of seed germination and cotyledon greening in Atdi19-3 mutant were higher, but in AtDi19-3 overexpression transgenic plants were lower than those in wild type. Roots of Atdi19-3 mutant seedlings were longer, but those of AtDi19-3 overexpression transgenic seedlings were shorter than those of wild type. Chlorophyll and proline contents in Atdi19-3 mutant were higher, but in AtDi19-3 overexpression seedlings were lower than those in wild type. Atdi19-3 mutant showed greater drought-tolerance, whereas AtDi19-3 overexpression transgenic plants exhibited more drought-sensitivity than wild type. Furthermore, expression of the genes related to ABA signaling pathway was altered in Atdi19-3 mutant and AtDi19-3 transgenic plants. These data suggest that AtDi19-3 may participate in plant response to drought and salt stresses in an ABA-dependent manner.
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Affiliation(s)
- Li-Xia Qin
- Hubei Key Laboratory of Genetic Regulation and Integrative Biology, College of Life Sciences, Central China Normal University, Wuhan, 430079, China
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192
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Goh EJ, Kim JB, Kim WJ, Ha BK, Kim SH, Kang SY, Seo YW, Kim DS. Physiological changes and anti-oxidative responses of Arabidopsis plants after acute and chronic γ-irradiation. RADIATION AND ENVIRONMENTAL BIOPHYSICS 2014; 53:677-93. [PMID: 25169704 DOI: 10.1007/s00411-014-0562-5] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2013] [Accepted: 08/14/2014] [Indexed: 05/22/2023]
Abstract
To identify the effects of acute and chronic γ-irradiation in Arabidopsis plants, physiological responses and antioxidant-related gene expression were investigated. Seedlings were exposed to 200 Gy of γ-irradiation in acute manner for 1 or 24 h (A1 and A24) or in chronic manner for 1, 2, or 3 weeks (C1 W, C2 W, and C3 W). Plant height, silique number, and silique length in A1 and A24 irradiated plants were significantly reduced when compared to non-irradiated plants. Silique number decreased in response to both acute and chronic irradiation, except with the C3 W treatment, and the number of trichomes dramatically increased in A1 and C1 W. Electron spin resonance signal intensities increased in A1 and in all chronically irradiated plants, but decreased in the A24-treated plant. To investigate the effects of acute and chronic γ-irradiation on antioxidant enzymes, we examined activity of four antioxidant enzymes: catalase (CAT), peroxidase (POD), ascorbate peroxidase, and superoxide dismutase. In general, POD and CAT activities decreased in response to acute and chronic γ-irradiation. Oligonucleotide microarrays were used to investigate transcriptional changes after irradiation. Several genes related to reactive oxygen species signaling were up-regulated after acute and chronic exposure, including genes encoding heat shock factors, zinc finger proteins, NADPH oxidase, WRKY DNA-binding proteins, and calcium binding proteins. Taken together, our data indicate that the responses and activation of antioxidant systems prompted by irradiation exposure are dependent upon the γ-ray dose rate.
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Affiliation(s)
- Eun Jeong Goh
- Advanced Radiation Technology Institute, Korea Atomic Energy Research Institute, 29 Geumgu, Jeongeup, Jeonbuk, 580-185, Republic of korea
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193
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Zhang H, Liu Y, Wen F, Yao D, Wang L, Guo J, Ni L, Zhang A, Tan M, Jiang M. A novel rice C2H2-type zinc finger protein, ZFP36, is a key player involved in abscisic acid-induced antioxidant defence and oxidative stress tolerance in rice. JOURNAL OF EXPERIMENTAL BOTANY 2014; 65:5795-809. [PMID: 25071223 PMCID: PMC4203119 DOI: 10.1093/jxb/eru313] [Citation(s) in RCA: 125] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
C2H2-type zinc finger proteins (ZFPs) have been shown to play important roles in the responses of plants to oxidative and abiotic stresses, and different members of this family might have different roles during stresses. Here a novel abscisic acid (ABA)- and hydrogen peroxide (H₂O₂)-responsive C2H2-type ZFP gene, ZFP36, is identified in rice. The analyses of ZFP36-overexpressing and silenced transgenic rice plants showed that ZFP36 is involved in ABA-induced up-regulation of the expression and the activities of superoxide dismutase (SOD) and ascorbate peroxidase (APX). Overexpression of ZFP36 in rice plants was found to elevate the activities of antioxidant enzymes and to enhance the tolerance of rice plants to water stress and oxidative stress. In contrast, an RNA interference (RNAi) mutant of ZFP36 had lower activities of antioxidant enzymes and was more sensitive to water stress and oxidative stress. ABA-induced H₂O₂ production and ABA-activated mitogen-activated protein kinases (MAPKs) were shown to regulate the expression of ZFP36 in ABA signalling. On the other hand, ZFP36 also regulated the expression of NADPH oxidase genes, the production of H₂O₂, and the expression of OsMPK genes in ABA signalling. These results indicate that ZFP36 is required for ABA-induced antioxidant defence, for the tolerance of rice plants to water stress and oxidative stress, and for the regulation of the cross-talk between NADPH oxidase, H₂O₂, and MAPK in ABA signalling.
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Affiliation(s)
- Hong Zhang
- College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, People's Republic of China National Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing 210095, People's Republic of China
| | - Yanpei Liu
- College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, People's Republic of China National Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing 210095, People's Republic of China
| | - Feng Wen
- College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, People's Republic of China National Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing 210095, People's Republic of China
| | - Dongmei Yao
- College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, People's Republic of China National Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing 210095, People's Republic of China
| | - Lu Wang
- College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, People's Republic of China National Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing 210095, People's Republic of China
| | - Jin Guo
- College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, People's Republic of China National Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing 210095, People's Republic of China
| | - Lan Ni
- College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, People's Republic of China National Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing 210095, People's Republic of China
| | - Aying Zhang
- College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, People's Republic of China National Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing 210095, People's Republic of China
| | - Mingpu Tan
- College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, People's Republic of China National Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing 210095, People's Republic of China
| | - Mingyi Jiang
- College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, People's Republic of China National Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing 210095, People's Republic of China :
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194
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Ahmed NU, Jung HJ, Park JI, Cho YG, Hur Y, Nou IS. Identification and expression analysis of cold and freezing stress responsive genes of Brassica oleracea. Gene 2014; 554:215-23. [PMID: 25445291 DOI: 10.1016/j.gene.2014.10.050] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2014] [Revised: 10/15/2014] [Accepted: 10/27/2014] [Indexed: 10/24/2022]
Abstract
Cold and freezing stress is a major environmental constraint to the production of Brassica crops. Enhancement of tolerance by exploiting cold and freezing tolerance related genes offers the most efficient approach to address this problem. Cold-induced transcriptional profiling is a promising approach to the identification of potential genes related to cold and freezing stress tolerance. In this study, 99 highly expressed genes were identified from a whole genome microarray dataset of Brassica rapa. Blast search analysis of the Brassica oleracea database revealed the corresponding homologous genes. To validate their expression, pre-selected cold tolerant and susceptible cabbage lines were analyzed. Out of 99 BoCRGs, 43 were differentially expressed in response to varying degrees of cold and freezing stress in the contrasting cabbage lines. Among the differentially expressed genes, 18 were highly up-regulated in the tolerant lines, which is consistent with their microarray expression. Additionally, 12 BoCRGs were expressed differentially after cold stress treatment in two contrasting cabbage lines, and BoCRG54, 56, 59, 62, 70, 72 and 99 were predicted to be involved in cold regulatory pathways. Taken together, the cold-responsive genes identified in this study provide additional direction for elucidating the regulatory network of low temperature stress tolerance and developing cold and freezing stress resistant Brassica crops.
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Affiliation(s)
- Nasar Uddin Ahmed
- Department of Horticulture, Sunchon National University, 413 Jungang-ro, Suncheon, Jeonnam 540-950, Republic of Korea
| | - Hee-Jeong Jung
- Department of Horticulture, Sunchon National University, 413 Jungang-ro, Suncheon, Jeonnam 540-950, Republic of Korea
| | - Jong-In Park
- Department of Horticulture, Sunchon National University, 413 Jungang-ro, Suncheon, Jeonnam 540-950, Republic of Korea
| | - Yong-Gu Cho
- Department of Crop Science, Chungbuk National University, 410 Seongbongro, Heungdokgu, Cheongju 361-763, Republic of Korea
| | - Yoonkang Hur
- Department of Biology, College of Biological Sciences and Biotechnology, Chungnam National University, Daejeon 305-764, Republic of Korea
| | - Ill-Sup Nou
- Department of Horticulture, Sunchon National University, 413 Jungang-ro, Suncheon, Jeonnam 540-950, Republic of Korea.
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195
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Salt-induced stabilization of EIN3/EIL1 confers salinity tolerance by deterring ROS accumulation in Arabidopsis. PLoS Genet 2014; 10:e1004664. [PMID: 25330213 PMCID: PMC4199496 DOI: 10.1371/journal.pgen.1004664] [Citation(s) in RCA: 164] [Impact Index Per Article: 16.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2014] [Accepted: 08/12/2014] [Indexed: 11/30/2022] Open
Abstract
Ethylene has been regarded as a stress hormone to regulate myriad stress responses. Salinity stress is one of the most serious abiotic stresses limiting plant growth and development. But how ethylene signaling is involved in plant response to salt stress is poorly understood. Here we showed that Arabidopsis plants pretreated with ethylene exhibited enhanced tolerance to salt stress. Gain- and loss-of-function studies demonstrated that EIN3 (ETHYLENE INSENSITIVE 3) and EIL1 (EIN3-LIKE 1), two ethylene-activated transcription factors, are necessary and sufficient for the enhanced salt tolerance. High salinity induced the accumulation of EIN3/EIL1 proteins by promoting the proteasomal degradation of two EIN3/EIL1-targeting F-box proteins, EBF1 and EBF2, in an EIN2-independent manner. Whole-genome transcriptome analysis identified a list of SIED (Salt-Induced and EIN3/EIL1-Dependent) genes that participate in salt stress responses, including several genes encoding reactive oxygen species (ROS) scavengers. We performed a genetic screen for ein3 eil1-like salt-hypersensitive mutants and identified 5 EIN3 direct target genes including a previously unknown gene, SIED1 (At5g22270), which encodes a 93-amino acid polypeptide involved in ROS dismissal. We also found that activation of EIN3 increased peroxidase (POD) activity through the direct transcriptional regulation of PODs expression. Accordingly, ethylene pretreatment or EIN3 activation was able to preclude excess ROS accumulation and increased tolerance to salt stress. Taken together, our study provides new insights into the molecular action of ethylene signaling to enhance plant salt tolerance, and elucidates the transcriptional network of EIN3 in salt stress response. High salinity, as a world-wide abiotic stress, restricts root water uptake, damages cell physiology, and limits the productivity of agricultural crops. Ethylene is a major phytohormone that regulates plant development in response to adverse environments, including high salt stress. However, the molecular mechanisms of how ethylene signal exerts its effect and how ethylene signaling is modulated upon salt stress remain to be explored. Here, we report that high salinity induces EIN3/EIL1 protein accumulation and EBF1/2 protein degradation in an EIN2-independent manner. Moreover, the activated EIN3 deters excess ROS accumulation and increases salt tolerance. Transcriptome analysis and functional studies reveal an EIN3-directed gene network in salt stress response. Functional studies of 114 SIED (Salt-Induced and EIN3/EIL1-Dependent) genes identify a novel regulator of ROS dismissal and salt tolerance. This new understanding of ethylene/salt mutual regulation would allow a better manipulation and engineering of EIN3 and its downstream SIED genes to enhance plant tolerance and adaption to salt stress, particularly in those economically important crops in the future.
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196
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Yu GH, Jiang LL, Ma XF, Xu ZS, Liu MM, Shan SG, Cheng XG. A soybean C2H2-type zinc finger gene GmZF1 enhanced cold tolerance in transgenic Arabidopsis. PLoS One 2014; 9:e109399. [PMID: 25286048 PMCID: PMC4186855 DOI: 10.1371/journal.pone.0109399] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2014] [Accepted: 07/17/2014] [Indexed: 11/18/2022] Open
Abstract
Zinc finger proteins were involved in response to different environmental stresses in plant species. A typical Cys2/His2-type (C2H2-type) zinc finger gene GmZF1 from soybean was isolated and was composed of 172 amino acids containing two conserved C2H2-type zinc finger domains. Phylogenetic analysis showed that GmZF1 was clustered on the same branch with six C2H2-type ZFPs from dicotyledonous plants excepting for GsZFP1, and distinguished those from monocotyledon species. The GmZF1 protein was localized at the nucleus, and has specific binding activity with EP1S core sequence, and nucleotide mutation in the core sequence of EPSPS promoter changed the binding ability between GmZF1 protein and core DNA element, implying that two amino acid residues, G and C boxed in core sequence TGACAGTGTCA possibly play positive regulation role in recognizing DNA-binding sites in GmZF1 proteins. High accumulation of GmZF1 mRNA induced by exogenous ABA suggested that GmZF1 was involved in an ABA-dependent signal transduction pathway. Over-expression of GmZF1 significantly improved the contents of proline and soluble sugar and decreased the MDA contents in the transgenic lines exposed to cold stress, indicating that transgenic Arabidopsis carrying GmZF1 gene have adaptive mechanisms to cold stress. Over-expression of GmZF1 also increased the expression of cold-regulated cor6.6 gene by probably recognizing protein-DNA binding sites, suggesting that GmZF1 from soybean could enhance the tolerance of Arabidopsis to cold stress by regulating expression of cold-regulation gene in the transgenic Arabidopsis.
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Affiliation(s)
- Guo-Hong Yu
- Key Lab. of Plant Nutrition and Fertilizer, Ministry of Agriculture, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Lin-Lin Jiang
- Key Lab. of Plant Nutrition and Fertilizer, Ministry of Agriculture, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Xue-Feng Ma
- Key Lab. of Plant Nutrition and Fertilizer, Ministry of Agriculture, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing, China
- Institute of Agro-Products Processing Science and Technology, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Zhao-Shi Xu
- Institute of Crop Science, Chinese Academy of Agricultural Sciences (CAAS)/National Key Facility for Crop Gene Resources and Genetic Improvement, Key Laboratory of Biology and Genetic Improvement of Triticeae Crops, Ministry of Agriculture, Beijing, China
| | - Meng-Meng Liu
- Key Lab. of Plant Nutrition and Fertilizer, Ministry of Agriculture, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Shu-Guang Shan
- Key Lab. of Plant Nutrition and Fertilizer, Ministry of Agriculture, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Xian-Guo Cheng
- Key Lab. of Plant Nutrition and Fertilizer, Ministry of Agriculture, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing, China
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197
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Rao G, Sui J, Zeng Y, He C, Duan A, Zhang J. De novo transcriptome and small RNA analysis of two Chinese willow cultivars reveals stress response genes in Salix matsudana. PLoS One 2014; 9:e109122. [PMID: 25275458 PMCID: PMC4183547 DOI: 10.1371/journal.pone.0109122] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2014] [Accepted: 09/08/2014] [Indexed: 01/04/2023] Open
Abstract
Salix matsudana Koidz. is a deciduous, rapidly growing, and drought resistant tree and is one of the most widely distributed and commonly cultivated willow species in China. Currently little transcriptomic and small RNAomic data are available to reveal the genes involve in the stress resistant in S. matsudana. Here, we report the RNA-seq analysis results of both transcriptome and small RNAome data using Illumina deep sequencing of shoot tips from two willow variants(Salix. matsudana and Salix matsudana Koidz. cultivar 'Tortuosa'). De novo gene assembly was used to generate the consensus transcriptome and small RNAome, which contained 106,403 unique transcripts with an average length of 944 bp and a total length of 100.45 MB, and 166 known miRNAs representing 35 miRNA families. Comparison of transcriptomes and small RNAomes combined with quantitative real-time PCR from the two Salix libraries revealed a total of 292 different expressed genes(DEGs) and 36 different expressed miRNAs (DEMs). Among the DEGs and DEMs, 196 genes and 24 miRNAs were up regulated, 96 genes and 12 miRNA were down regulated in S. matsudana. Functional analysis of DEGs and miRNA targets showed that many genes were involved in stress resistance in S. matsudana. Our global gene expression profiling presents a comprehensive view of the transcriptome and small RNAome which provide valuable information and sequence resources for uncovering the stress response genes in S. matsudana. Moreover the transcriptome and small RNAome data provide a basis for future study of genetic resistance in Salix.
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Affiliation(s)
- Guodong Rao
- Key Laboratory of Tree Breeding and Cultivation, State Forestry Administration, Research Institute of Forestry, Chinese Academy of Forestry, Beijing, Republic of China
| | - Jinkai Sui
- Key Laboratory of Tree Breeding and Cultivation, State Forestry Administration, Research Institute of Forestry, Chinese Academy of Forestry, Beijing, Republic of China
| | - Yanfei Zeng
- State Key Laboratory of Tree Genetics and Breeding, Research Institute of Forestry, Chinese Academy of Forestry, Beijing, Republic of China
- Key Laboratory of Tree Breeding and Cultivation, State Forestry Administration, Research Institute of Forestry, Chinese Academy of Forestry, Beijing, Republic of China
| | - Caiyun He
- State Key Laboratory of Tree Genetics and Breeding, Research Institute of Forestry, Chinese Academy of Forestry, Beijing, Republic of China
- Key Laboratory of Tree Breeding and Cultivation, State Forestry Administration, Research Institute of Forestry, Chinese Academy of Forestry, Beijing, Republic of China
| | - Aiguo Duan
- State Key Laboratory of Tree Genetics and Breeding, Research Institute of Forestry, Chinese Academy of Forestry, Beijing, Republic of China
- Key Laboratory of Tree Breeding and Cultivation, State Forestry Administration, Research Institute of Forestry, Chinese Academy of Forestry, Beijing, Republic of China
| | - Jianguo Zhang
- State Key Laboratory of Tree Genetics and Breeding, Research Institute of Forestry, Chinese Academy of Forestry, Beijing, Republic of China
- Key Laboratory of Tree Breeding and Cultivation, State Forestry Administration, Research Institute of Forestry, Chinese Academy of Forestry, Beijing, Republic of China
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198
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Li CL, Wang M, Ma XY, Zhang W. NRGA1, a putative mitochondrial pyruvate carrier, mediates ABA regulation of guard cell ion channels and drought stress responses in Arabidopsis. MOLECULAR PLANT 2014; 7:1508-21. [PMID: 24842572 DOI: 10.1093/mp/ssu061] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
Abscisic acid (ABA) regulates ion channel activity and stomatal movements in response to drought and other stresses. Here, we show that the Arabidopsis thaliana gene NRGA1 is a putative mitochondrial pyruvate carrier which negatively regulates ABA-induced guard cell signaling. NRGA1 transcript was abundant in the A. thaliana leaf and particularly in the guard cells, and its product was directed to the mitochondria. The heterologous co-expression of NRGA1 and AtMPC1 in yeast complemented a loss-of-function mitochondrial pyruvate carrier (MPC) mutant. The nrga1 loss-of-function mutant was very sensitive to the presence of ABA in the context of stomatal movements, and exhibited a heightened tolerance to drought stress. Disruption of NRGA1 gene resulted in increased ABA inhibition of inward K(+) currents and ABA activation of slow anion currents in guard cells. The nrga1/NRGA1 functional complementation lines restored the mutant's phenotypes. Furthermore, transgenic lines of constitutively overexpressing NRGA1 showed opposite stomatal responses, reduced drought tolerance, and ABA sensitivity of guard cell inward K(+) channel inhibition and anion channel activation. Our findings highlight a putative role for the mitochondrial pyruvate carrier in guard cell ABA signaling in response to drought.
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Affiliation(s)
- Chun-Long Li
- Key Laboratory of Plant Cell Engineering and Germplasm Innovation, Ministry of Education, School of Life Science, Shandong University, Jinan, 250100, China
| | - Mei Wang
- Key Laboratory of Plant Cell Engineering and Germplasm Innovation, Ministry of Education, School of Life Science, Shandong University, Jinan, 250100, China
| | - Xiao-Yan Ma
- Key Laboratory of Plant Cell Engineering and Germplasm Innovation, Ministry of Education, School of Life Science, Shandong University, Jinan, 250100, China
| | - Wei Zhang
- Key Laboratory of Plant Cell Engineering and Germplasm Innovation, Ministry of Education, School of Life Science, Shandong University, Jinan, 250100, China
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199
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Peng Z, He S, Gong W, Sun J, Pan Z, Xu F, Lu Y, Du X. Comprehensive analysis of differentially expressed genes and transcriptional regulation induced by salt stress in two contrasting cotton genotypes. BMC Genomics 2014; 15:760. [PMID: 25189468 PMCID: PMC4169805 DOI: 10.1186/1471-2164-15-760] [Citation(s) in RCA: 106] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2014] [Accepted: 08/04/2014] [Indexed: 12/26/2022] Open
Abstract
Background Cotton (Gossypium spp.) is one of the major fibre crops of the world. Although it is classified as salt tolerant crop, cotton growth and productivity are adversely affected by high salinity, especially at germination and seedling stages. Identification of genes and miRNAs responsible for salt tolerance in upland cotton (Gossypium hirsutum L.) would help reveal the molecular mechanisms of salt tolerance. We performed physiological experiments and transcriptome sequencing (mRNA-seq and small RNA-seq) of cotton leaves under salt stress using Illumina sequencing technology. Results We investigated two distinct salt stress phases—dehydration (4 h) and ionic stress (osmotic restoration; 24 h)—that were identified by physiological changes of 14-day-old seedlings of two cotton genotypes, one salt tolerant and the other salt sensitive, during a 72-h NaCl exposure. A comparative transcriptomics was used to monitor gene and miRNA differential expression at two time points (4 and 24 h) in leaves of the two cotton genotypes under salinity conditions. The expression patterns of differentially co-expressed unigenes were divided into six groups using short time-servies expression miner software. During a 24-h salt exposure, 819 transcription factor unigenes were differentially expressed in both genotypes, with 129 unigenes specifically expressed in the salt-tolerant genotype. Under salt stress, 108 conserved miRNAs from known families were differentially expressed at two time points in the salt-tolerant genotype. We further analyzed the predicted target genes of these miRNAs along with the transcriptome for each time point. Important expressed genes encoding membrane receptors, transporters, and pathways involved in biosynthesis and signal transduction of calcium-dependent protein kinase, mitogen-activated protein kinase, and hormones (abscisic acid and ethylene) were up-regulated. We also analyzed the salt stress response of some key miRNAs and their target genes and found that the expressions of five of nine target genes exhibited significant inverse correlations with their corresponding miRNAs. On the basis of these results, we constructed molecular regulatory pathways and a potential regulatory network for these salt-responsive miRNAs. Conclusions Our comprehensive transcriptome analysis has provided new insights into salt-stress response of upland cotton. The results should contribute to the development of genetically modified cotton with salt tolerance. Electronic supplementary material The online version of this article (doi:10.1186/1471-2164-15-760) contains supplementary material, which is available to authorized users.
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Affiliation(s)
| | | | | | | | | | | | - Yanli Lu
- State Key Laboratory of Cotton Biology/Institute of Cotton Research, Chinese Academy of Agricultural Sciences, 455000 Anyang, Henan, China.
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200
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Nguyen VNT, Moon S, Jung KH. Genome-wide expression analysis of rice ABC transporter family across spatio-temporal samples and in response to abiotic stresses. JOURNAL OF PLANT PHYSIOLOGY 2014; 171:1276-88. [PMID: 25014263 DOI: 10.1016/j.jplph.2014.05.006] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2013] [Revised: 04/28/2014] [Accepted: 05/13/2014] [Indexed: 05/20/2023]
Abstract
Although the super family of ATP-binding cassette (ABC) proteins plays key roles in the physiology and development of plants, the functions of members of this interesting family mostly remain to be clarified, especially in crop plants. Thus, systematic analysis of this family in rice (Oryza sativa), a major model crop plant, will be helpful in the design of effective strategies for functional analysis. Phylogenomic analysis that integrates anatomy and stress meta-profiling data based on a large collection of rice Affymetrix array data into the phylogenic context provides useful clues into the functions for each of the ABC transporter family members in rice. Using anatomy data, we identified 17 root-preferred and 16-shoot preferred genes at the vegetative stage, and 3 pollen, 2 embryo, 2 ovary, 2 endosperm, and 1 anther-preferred gene at the reproductive stage. The stress data revealed significant up-regulation or down-regulation of 47 genes under heavy metal treatment, 16 genes under nutrient deficient conditions, and 51 genes under abiotic stress conditions. Of these, we confirmed the differential expression patterns of 14 genes in root samples exposed to drought stress using quantitative real-time PCR. Network analysis using RiceNet suggests a functional gene network involving nine rice ABC transporters that are differentially regulated by drought stress in root, further enhancing the prediction of biological function. Our analysis provides a molecular basis for the study of diverse biological phenomena mediated by the ABC family in rice and will contribute to the enhancement of crop yield and stress tolerance.
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Affiliation(s)
- Van Ngoc Tuyet Nguyen
- Department of Plant Molecular Systems Biotechnology & Graduate School of Biotechnology, Kyung Hee University, Yongin 446-701, Republic of Korea.
| | - Sunok Moon
- Department of Plant Molecular Systems Biotechnology & Graduate School of Biotechnology, Kyung Hee University, Yongin 446-701, Republic of Korea.
| | - Ki-Hong Jung
- Department of Plant Molecular Systems Biotechnology & Graduate School of Biotechnology, Kyung Hee University, Yongin 446-701, Republic of Korea.
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