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Fan J, Zhang H, Shi Y, Li Y, He Y, Wang Q, Liu S, Yao Y, Zhou X, Liao J, Huang Y, Wang Z. Systematic identification and characterization of microRNAs with target genes involved in high night temperature stress at the filling stage of rice. PHYSIOLOGIA PLANTARUM 2024; 176:e14305. [PMID: 38659134 DOI: 10.1111/ppl.14305] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2024] [Revised: 04/07/2024] [Accepted: 04/10/2024] [Indexed: 04/26/2024]
Abstract
High night temperature stress is one of the main environmental factors affecting rice yield and quality. More and more evidence shows that microRNA (miRNA) plays an important role in various abiotic stresses. However, the molecular network of miRNA regulation on rice tolerance to high night temperatures remains unclear. Here, small RNA, transcriptome and degradome sequencing were integrated to identify differentially expressed miRNAs, genes, and key miRNA-target gene pairs in rice heat-sensitive and heat-tolerant lines at the filling stage suffering from high night temperature stress. It was discovered that there were notable differences in the relative expression of 102 miRNAs between the two rice lines under stress. Meanwhile, 5263 and 5405 mRNAs were differentially expressed in the heat-sensitive line and heat-tolerant line, and functional enrichment analysis revealed that these genes were involved in heat-related processes and pathways. The miRNAs-mRNAs target relationship was further verified by degradome sequencing. Eventually, 49 miRNAs-222 mRNAs target pairs with reverse expression patterns showed significant relative expression changes between the heat-tolerant and the heat-sensitive line, being suggested to be responsible for the heat tolerance difference of these two rice lines. Functional analysis of these 222 mRNA transcripts showed that high night temperature-responsive miRNAs targeted these mRNAs involved in many heat-related biological processes, such as transcription regulation, chloroplast regulation, mitochondrion regulation, protein folding, hormone regulation and redox process. This study identified possible miRNA-mRNA regulation relationships in response to high night temperature stress in rice and potentially contributed to heat resistance breeding of rice in the future.
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Affiliation(s)
- Jiangmin Fan
- Key Laboratory of Crop Physiology, Ecology and Genetic Breeding (Jiangxi Agricultural University), Ministry of Education of the P.R. China, Nanchang, Jiangxi Province, China
- Key Laboratory of Agriculture Responding to Climate Change (Jiangxi Agricultural University), Nanchang, Jiangxi Province, China
| | - Hongyu Zhang
- Key Laboratory of Crop Physiology, Ecology and Genetic Breeding (Jiangxi Agricultural University), Ministry of Education of the P.R. China, Nanchang, Jiangxi Province, China
- Key Laboratory of Agriculture Responding to Climate Change (Jiangxi Agricultural University), Nanchang, Jiangxi Province, China
| | - Yan Shi
- Key Laboratory of Crop Physiology, Ecology and Genetic Breeding (Jiangxi Agricultural University), Ministry of Education of the P.R. China, Nanchang, Jiangxi Province, China
- Key Laboratory of Agriculture Responding to Climate Change (Jiangxi Agricultural University), Nanchang, Jiangxi Province, China
| | - Yuewu Li
- Key Laboratory of Crop Physiology, Ecology and Genetic Breeding (Jiangxi Agricultural University), Ministry of Education of the P.R. China, Nanchang, Jiangxi Province, China
- Key Laboratory of Agriculture Responding to Climate Change (Jiangxi Agricultural University), Nanchang, Jiangxi Province, China
| | - Yuxiang He
- Key Laboratory of Crop Physiology, Ecology and Genetic Breeding (Jiangxi Agricultural University), Ministry of Education of the P.R. China, Nanchang, Jiangxi Province, China
- Key Laboratory of Agriculture Responding to Climate Change (Jiangxi Agricultural University), Nanchang, Jiangxi Province, China
| | - Qiang Wang
- Key Laboratory of Crop Physiology, Ecology and Genetic Breeding (Jiangxi Agricultural University), Ministry of Education of the P.R. China, Nanchang, Jiangxi Province, China
- Key Laboratory of Agriculture Responding to Climate Change (Jiangxi Agricultural University), Nanchang, Jiangxi Province, China
| | - Siyi Liu
- Key Laboratory of Crop Physiology, Ecology and Genetic Breeding (Jiangxi Agricultural University), Ministry of Education of the P.R. China, Nanchang, Jiangxi Province, China
- Key Laboratory of Agriculture Responding to Climate Change (Jiangxi Agricultural University), Nanchang, Jiangxi Province, China
| | - Youmin Yao
- Key Laboratory of Crop Physiology, Ecology and Genetic Breeding (Jiangxi Agricultural University), Ministry of Education of the P.R. China, Nanchang, Jiangxi Province, China
- Key Laboratory of Agriculture Responding to Climate Change (Jiangxi Agricultural University), Nanchang, Jiangxi Province, China
| | - Xiaoya Zhou
- Key Laboratory of Crop Physiology, Ecology and Genetic Breeding (Jiangxi Agricultural University), Ministry of Education of the P.R. China, Nanchang, Jiangxi Province, China
- Key Laboratory of Agriculture Responding to Climate Change (Jiangxi Agricultural University), Nanchang, Jiangxi Province, China
| | - Jianglin Liao
- Key Laboratory of Crop Physiology, Ecology and Genetic Breeding (Jiangxi Agricultural University), Ministry of Education of the P.R. China, Nanchang, Jiangxi Province, China
- Key Laboratory of Agriculture Responding to Climate Change (Jiangxi Agricultural University), Nanchang, Jiangxi Province, China
| | - Yingjin Huang
- Key Laboratory of Crop Physiology, Ecology and Genetic Breeding (Jiangxi Agricultural University), Ministry of Education of the P.R. China, Nanchang, Jiangxi Province, China
- Key Laboratory of Agriculture Responding to Climate Change (Jiangxi Agricultural University), Nanchang, Jiangxi Province, China
| | - Zhaohai Wang
- Key Laboratory of Crop Physiology, Ecology and Genetic Breeding (Jiangxi Agricultural University), Ministry of Education of the P.R. China, Nanchang, Jiangxi Province, China
- Key Laboratory of Agriculture Responding to Climate Change (Jiangxi Agricultural University), Nanchang, Jiangxi Province, China
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Wi J, Park EJ, Hwang MS, Choi DW. A subfamily of the small heat shock proteins of the marine red alga Neopyropia yezoensis localizes in the chloroplast. Cell Stress Chaperones 2023; 28:835-846. [PMID: 37632625 PMCID: PMC10746837 DOI: 10.1007/s12192-023-01375-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Revised: 12/21/2022] [Accepted: 08/21/2023] [Indexed: 08/28/2023] Open
Abstract
Small heat shock proteins (sHSPs) play a crucial role under abiotic stress and are present in all organisms, from eukaryotes to prokaryotes. However, studies on the sHSP gene family in red alga are limited. In this study, we aimed to identify and characterize NysHSP genes from the genome of N. yezoensis, a marine red alga adapted to the stressful intertidal zone. We identified seven NysHSP genes distributed on all three chromosomes. Expression analysis revealed that all NysHSP genes responded to H2O2 and heat stress in the gametophytic thalli, but these genes responded only to heat stress in the sporophytic conchocelis. NysHSP20.3, which has an acidic isoelectric point (pI) and short N-terminal region, was localized as granules in the cytosol. Fluorescence imaging of the NysHSP25.8-GFP and NysHSP28.4-GFP fusion proteins revealed that these proteins were located in the chloroplast. Based on their characteristics and cellular localization, the NysHSPs are divided into two subfamilies. Subfamily I includes four sHSP genes that strongly respond to heat stress and encode a protein localized in the cytosol. The NysHSP gene of subfamily II encodes a polypeptide with a long N-terminal region located in the chloroplast. This study provides insights into the evolution and function of the sHSP gene family of the marine red alga N. yezoensis and how it adapts to the stressful intertidal zone.
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Affiliation(s)
- Jiwoong Wi
- Department of Biology Education and Kumho Life Science Laboratory, Chonnam National University, Gwangju, 61186, Republic of Korea
| | - Eun-Jeong Park
- Aquatic Plant Variety Center, National Institute of Fisheries Science, Mokpo, 59002, Republic of Korea
| | - Mi-Sook Hwang
- Fisheries Seed and Breeding Research Institute, National Institute of Fisheries Science, Haenam, 58746, Republic of Korea
| | - Dong-Woog Choi
- Department of Biology Education and Kumho Life Science Laboratory, Chonnam National University, Gwangju, 61186, Republic of Korea.
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Usman B, Derakhshani B, Jung KH. Recent Molecular Aspects and Integrated Omics Strategies for Understanding the Abiotic Stress Tolerance of Rice. PLANTS (BASEL, SWITZERLAND) 2023; 12:2019. [PMID: 37653936 PMCID: PMC10221523 DOI: 10.3390/plants12102019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/24/2023] [Revised: 05/11/2023] [Accepted: 05/17/2023] [Indexed: 09/02/2023]
Abstract
Rice is an important staple food crop for over half of the world's population. However, abiotic stresses seriously threaten rice yield improvement and sustainable production. Breeding and planting rice varieties with high environmental stress tolerance are the most cost-effective, safe, healthy, and environmentally friendly strategies. In-depth research on the molecular mechanism of rice plants in response to different stresses can provide an important theoretical basis for breeding rice varieties with higher stress resistance. This review presents the molecular mechanisms and the effects of various abiotic stresses on rice growth and development and explains the signal perception mode and transduction pathways. Meanwhile, the regulatory mechanisms of critical transcription factors in regulating gene expression and important downstream factors in coordinating stress tolerance are outlined. Finally, the utilization of omics approaches to retrieve hub genes and an outlook on future research are prospected, focusing on the regulatory mechanisms of multi-signaling network modules and sustainable rice production.
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Affiliation(s)
- Babar Usman
- Graduate School of Green Green-Bio Science and Crop Biotech Institute, Kyung Hee University, Yongin 17104, Republic of Korea; (B.U.)
| | - Behnam Derakhshani
- Graduate School of Green Green-Bio Science and Crop Biotech Institute, Kyung Hee University, Yongin 17104, Republic of Korea; (B.U.)
| | - Ki-Hong Jung
- Graduate School of Green Green-Bio Science and Crop Biotech Institute, Kyung Hee University, Yongin 17104, Republic of Korea; (B.U.)
- Research Center for Plant Plasticity, Kyung Hee University, Yongin 17104, Republic of Korea
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Bourgine B, Guihur A. Heat Shock Signaling in Land Plants: From Plasma Membrane Sensing to the Transcription of Small Heat Shock Proteins. FRONTIERS IN PLANT SCIENCE 2021; 12:710801. [PMID: 34434209 PMCID: PMC8381196 DOI: 10.3389/fpls.2021.710801] [Citation(s) in RCA: 55] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Accepted: 07/06/2021] [Indexed: 05/08/2023]
Abstract
Heat stress events are major factors limiting crop productivity. During summer days, land plants must anticipate in a timely manner upcoming mild and severe temperature. They respond by accumulating protective heat-shock proteins (HSPs), conferring acquired thermotolerance. All organisms synthetize HSPs; many of which are members of the conserved chaperones families. This review describes recent advances in plant temperature sensing, signaling, and response. We highlight the pathway from heat perception by the plasma membrane through calcium channels, such as cyclic nucleotide-gated channels, to the activation of the heat-shock transcription factors (HSFs). An unclear cellular signal activates HSFs, which act as essential regulators. In particular, the HSFA subfamily can bind heat shock elements in HSP promoters and could mediate the dissociation of bound histones, leading to HSPs transcription. Although plants can modulate their transcriptome, proteome, and metabolome to protect the cellular machinery, HSP chaperones prevent, use, and revert the formation of misfolded proteins, thereby avoiding heat-induced cell death. Remarkably, the HSP20 family is mostly tightly repressed at low temperature, suggesting that a costly mechanism can become detrimental under unnecessary conditions. Here, the role of HSP20s in response to HS and their possible deleterious expression at non-HS temperatures is discussed.
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Affiliation(s)
| | - Anthony Guihur
- Department of Plant Molecular Biology, Faculty of Biology and Medicine, University of Lausanne, Lausanne, Switzerland
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Huo L, Sun X, Guo Z, Jia X, Che R, Sun Y, Zhu Y, Wang P, Gong X, Ma F. MdATG18a overexpression improves basal thermotolerance in transgenic apple by decreasing damage to chloroplasts. HORTICULTURE RESEARCH 2020; 7:21. [PMID: 32140230 PMCID: PMC7049305 DOI: 10.1038/s41438-020-0243-2] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Revised: 01/01/2020] [Accepted: 01/04/2020] [Indexed: 05/06/2023]
Abstract
High temperature is an abiotic stress factor that threatens plant growth and development. Autophagy in response to heat stress involves the selective removal of heat-induced protein complexes. Previously, we showed that a crucial autophagy protein from apple, MdATG18a, has a positive effect on drought tolerance. In the present study, we treated transgenic apple (Malus domestica) plants overexpressing MdATG18a with high temperature and found that autophagy protected them from heat stress. Overexpression of MdATG18a in apple enhanced antioxidase activity and contributed to the production of increased beneficial antioxidants under heat stress. Transgenic apple plants exhibited higher photosynthetic capacity, as shown by the rate of CO2 assimilation, the maximum photochemical efficiency of photosystem II (PSII), the effective quantum yield, and the electron transport rates in photosystems I and II (PSI and PSII, respectively). We also detected elevated autophagic activity and reduced damage to chloroplasts in transgenic plants compared to WT plants. In addition, the transcriptional activities of several HSP genes were increased in transgenic apple plants. In summary, we propose that autophagy plays a critical role in basal thermotolerance in apple, primarily through a combination of enhanced antioxidant activity and reduced chloroplast damage.
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Affiliation(s)
- Liuqing Huo
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, Yangling, 712100 Shaanxi China
| | - Xun Sun
- Center of Pear Engineering Technology Research, State Key Laboratory of Crop Genetics and Germplasm Enhancement, College of Horticulture, Nanjing Agricultural University, Nanjing, 210095 China
| | - Zijian Guo
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, Yangling, 712100 Shaanxi China
| | - Xin Jia
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, Yangling, 712100 Shaanxi China
| | - Runmin Che
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, Yangling, 712100 Shaanxi China
| | - Yiming Sun
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, Yangling, 712100 Shaanxi China
| | - Yanfei Zhu
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, Yangling, 712100 Shaanxi China
| | - Ping Wang
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, Yangling, 712100 Shaanxi China
| | - Xiaoqing Gong
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, Yangling, 712100 Shaanxi China
| | - Fengwang Ma
- State Key Laboratory of Crop Stress Biology for Arid Areas/Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, Yangling, 712100 Shaanxi China
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Guo LM, Li J, He J, Liu H, Zhang HM. A class I cytosolic HSP20 of rice enhances heat and salt tolerance in different organisms. Sci Rep 2020; 10:1383. [PMID: 31992813 PMCID: PMC6987133 DOI: 10.1038/s41598-020-58395-8] [Citation(s) in RCA: 46] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2019] [Accepted: 01/13/2020] [Indexed: 01/07/2023] Open
Abstract
Small heat shock proteins (sHSPs) have been thought to function as chaperones, protecting their targets from denaturation and aggregation when organisms are subjected to various biotic and abiotic stresses. We previously reported an sHSP from Oryza sativa (OsHSP20) that homodimerizes and forms granules within the cytoplasm but its function was unclear. We now show that OsHSP20 transcripts were significantly up-regulated by heat shock and high salinity but not by drought. A recombinant protein was purified and shown to inhibit the thermal aggregation of the mitochondrial malate dehydrogenase (MDH) enzyme in vitro, and this molecular chaperone activity suggested that OsHSP20 might be involved in stress resistance. Heterologous expression of OsHSP20 in Escherichia coli or Pichia pastoris cells enhanced heat and salt stress tolerance when compared with the control cultures. Transgenic rice plants constitutively overexpressing OsHSP20 and exposed to heat and salt treatments had longer roots and higher germination rates than those of control plants. A series of assays using its truncated mutants showed that its N-terminal arm plus the ACD domain was crucial for its homodimerization, molecular chaperone activity in vitro, and stress tolerance in vivo. The results supported the viewpoint that OsHSP20 could confer heat and salt tolerance by its molecular chaperone activity in different organisms and also provided a more thorough characterization of HSP20-mediated stress tolerance in O. sativa.
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Affiliation(s)
- Liu-Ming Guo
- Institute of Virology and Biotechnology, Zhejiang Academy of Agricultural Sciences, Hangzhou, 310021, China.,College of Chemistry and Life Science, Zhejiang Normal University, Jinhua, 321004, China
| | - Jing Li
- Institute of Virology and Biotechnology, Zhejiang Academy of Agricultural Sciences, Hangzhou, 310021, China
| | - Jing He
- Institute of Virology and Biotechnology, Zhejiang Academy of Agricultural Sciences, Hangzhou, 310021, China.,College of Chemistry and Life Science, Zhejiang Normal University, Jinhua, 321004, China
| | - Han Liu
- Institute of Virology and Biotechnology, Zhejiang Academy of Agricultural Sciences, Hangzhou, 310021, China.,College of Chemistry and Life Science, Zhejiang Normal University, Jinhua, 321004, China
| | - Heng-Mu Zhang
- Institute of Virology and Biotechnology, Zhejiang Academy of Agricultural Sciences, Hangzhou, 310021, China. .,College of Chemistry and Life Science, Zhejiang Normal University, Jinhua, 321004, China.
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Ji XR, Yu YH, Ni PY, Zhang GH, Guo DL. Genome-wide identification of small heat-shock protein (HSP20) gene family in grape and expression profile during berry development. BMC PLANT BIOLOGY 2019; 19:433. [PMID: 31623556 PMCID: PMC6798335 DOI: 10.1186/s12870-019-2031-4] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/04/2019] [Accepted: 09/11/2019] [Indexed: 05/09/2023]
Abstract
BACKGROUND Studies have shown that HSP20 (heat-shock protein 20) genes play important roles in regulating plant growth, development, and stress response. However, the grape HSP20 gene family has not been well studied. RESULTS A total of 48 VvHSP20 genes were identified from the grape genome, which were divided into 11 subfamilies (CI, CII, CIII, CV, CVI, CVII, MI, MII, ER, CP and PX/Po) based on a phylogenetic analysis and subcellular localization. Further structural analysis showed that most of the VvHSP20 genes (93.8%) had no intron or only one intron, while genes that clustered together based on a phylogenetic tree had similar motifs and evolutionarily conserved structures. The HSP20s share a conservedα-crystalline domain (ACD) and the different components of the ACD domain suggest the functional diversity of VvHSP20s. In addition, the 48 VvHSP20 genes were distributed on 12 grape chromosomes and the majority of VvHSP20 genes were located at the proximal or distal ends of chromosomes. Chromosome mapping indicated that four groups of VvHSP20 genes were identified as tandem duplication genes. Phytohormone responsive, abiotic and biotic stress-responsive, and plant development-related cis-elements were identified from the cis-regulatory elements analysis of VvHSP20s. The expression profiles of VvHSP20s genes (VvHSP20-1, 11, 14, 17, 18, 19, 20, 24, 25, 28, 31, 39, 42, and 43) were largely similar between RNA-Seq and qRT-PCR analysis after hydrogen peroxide (H2O2) treatment. The results showed that most VvHSP20s were down-regulated by H2O2 treatment during fruit development. VvHSP20s genes were indeed found to be involved in the grape berry development and differences in their transcriptional levels may be the result of functional differentiation during evolution. CONCLUSIONS Our results provide valuable information on the evolutionary relationship of genes in the VvHSP20 family, which is useful for future studies on the functional characteristics of VvHSP20 genes in grape.
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Affiliation(s)
- Xiao-Ru Ji
- College of Forestry, Henan University of Science and Technology, Luoyang, 471023 Henan Province China
- Henan Engineering Technology Research Center of Quality Regulation and Controlling of Horticultural Plants, Luoyang, 471023 Henan Province China
| | - Yi-He Yu
- College of Forestry, Henan University of Science and Technology, Luoyang, 471023 Henan Province China
- Henan Engineering Technology Research Center of Quality Regulation and Controlling of Horticultural Plants, Luoyang, 471023 Henan Province China
| | - Pei-Yi Ni
- College of Forestry, Henan University of Science and Technology, Luoyang, 471023 Henan Province China
- Henan Engineering Technology Research Center of Quality Regulation and Controlling of Horticultural Plants, Luoyang, 471023 Henan Province China
| | - Guo-Hai Zhang
- College of Forestry, Henan University of Science and Technology, Luoyang, 471023 Henan Province China
| | - Da-Long Guo
- College of Forestry, Henan University of Science and Technology, Luoyang, 471023 Henan Province China
- Henan Engineering Technology Research Center of Quality Regulation and Controlling of Horticultural Plants, Luoyang, 471023 Henan Province China
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A Systematic View Exploring the Role of Chloroplasts in Plant Abiotic Stress Responses. BIOMED RESEARCH INTERNATIONAL 2019; 2019:6534745. [PMID: 31396532 PMCID: PMC6668530 DOI: 10.1155/2019/6534745] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/22/2019] [Revised: 06/17/2019] [Accepted: 06/19/2019] [Indexed: 11/18/2022]
Abstract
Chloroplasts are intracellular semiautonomous organelles central to photosynthesis and are essential for plant growth and yield. The significance of the function of chloroplast-related genes in response to climate change has not been well studied in crops. In the present study, the initial focus was on genes that were predicted to be located in the chloroplast genome in rice, a model crop plant, with genes either preferentially expressed in the leaf or ubiquitously expressed in all organs. The characteristics were analyzed by Gene Ontology (GO) enrichment and MapMan functional classification tools. It was then identified that 110 GO terms (45 for leaf expression and 65 for ubiquitous expression) and 1,695 genes mapped to MapMan overviews were strongly associated with chloroplasts. In particular, the MapMan cellular response overview revealed a close association between heat stress response and chloroplast-related genes in rice. Moreover, features of these genes in response to abiotic stress were analyzed using a large-scale publicly available transcript dataset. Consequently, the expression of 215 genes was found to be upregulated in response to high temperature stress. Conversely, genes that responded to other stresses were extremely limited. In other words, chloroplast-related genes were found to affect abiotic stress response mainly through high temperature response, with little effect on response to drought and salinity stress. These results suggest that genes involved in diurnal rhythm in the leaves participate in the reaction to recognize temperature changes in the environment. Furthermore, the predicted protein–protein interaction network analysis associated with high temperature stress is expected to provide a very important basis for the study of molecular mechanisms by which chloroplasts will respond to future climate changes.
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Yu X, Ekramoddoullah AK, Sturrock RN, Zamani A. The antigen reactive to an anti-white pine blister rust fungal monoclonal antibody (Mab 7) is a homologue of 70-kDa heat shock proteins (a BiP protein). Mycologia 2019. [DOI: 10.1080/00275514.2001.12063250] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Xueshu Yu
- Natural Resources Canada, Canadian Forest Service, Pacific Forestry Centre, 506 West Burnside Road, Victoria, British Columbia, V8Z 1M5
| | - Abul K.M. Ekramoddoullah
- Natural Resources Canada, Canadian Forest Service, Pacific Forestry Centre, 506 West Burnside Road, Victoria, British Columbia, V8Z 1M5
| | - Rona N. Sturrock
- Natural Resources Canada, Canadian Forest Service, Pacific Forestry Centre, 506 West Burnside Road, Victoria, British Columbia, V8Z 1M5
| | - Arezoo Zamani
- Natural Resources Canada, Canadian Forest Service, Pacific Forestry Centre, 506 West Burnside Road, Victoria, British Columbia, V8Z 1M5
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Sircar S, Parekh N. Meta-analysis of drought-tolerant genotypes in Oryza sativa: A network-based approach. PLoS One 2019; 14:e0216068. [PMID: 31059518 PMCID: PMC6502313 DOI: 10.1371/journal.pone.0216068] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2018] [Accepted: 04/12/2019] [Indexed: 12/30/2022] Open
Abstract
BACKGROUND Drought is a severe environmental stress. It is estimated that about 50% of the world rice production is affected mainly by drought. Apart from conventional breeding strategies to develop drought-tolerant crops, innovative computational approaches may provide insights into the underlying molecular mechanisms of stress response and identify drought-responsive markers. Here we propose a network-based computational approach involving a meta-analytic study of seven drought-tolerant rice genotypes under drought stress. RESULTS Co-expression networks enable large-scale analysis of gene-pair associations and tightly coupled clusters that may represent coordinated biological processes. Considering differentially expressed genes in the co-expressed modules and supplementing external information such as resistance/tolerance QTLs, transcription factors, network-based topological measures, we identify and prioritize drought-adaptive co-expressed gene modules and potential candidate genes. Using the candidate genes that are well-represented across the datasets as 'seed' genes, two drought-specific protein-protein interaction networks (PPINs) are constructed with up- and down-regulated genes. Cluster analysis of the up-regulated PPIN revealed ABA signalling pathway as a central process in drought response with a probable crosstalk with energy metabolic processes. Tightly coupled gene clusters representing up-regulation of core cellular respiratory processes and enhanced degradation of branched chain amino acids and cell wall metabolism are identified. Cluster analysis of down-regulated PPIN provides a snapshot of major processes associated with photosynthesis, growth, development and protein synthesis, most of which are shut down during drought. Differential regulation of phytohormones, e.g., jasmonic acid, cell wall metabolism, signalling and posttranslational modifications associated with biotic stress are elucidated. Functional characterization of topologically important, drought-responsive uncharacterized genes that may play a role in important processes such as ABA signalling, calcium signalling, photosynthesis and cell wall metabolism is discussed. Further transgenic studies on these genes may help in elucidating their biological role under stress conditions. CONCLUSION Currently, a large number of resources for rice functional genomics exist which are mostly underutilized by the scientific community. In this study, a computational approach integrating information from various resources such as gene co-expression networks, protein-protein interactions and pathway-level information is proposed to provide a systems-level view of complex drought-responsive processes across the drought-tolerant genotypes.
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Affiliation(s)
- Sanchari Sircar
- Centre for Computational Natural Sciences and Bioinformatics, International Institute of Information Technology, Hyderabad, India
| | - Nita Parekh
- Centre for Computational Natural Sciences and Bioinformatics, International Institute of Information Technology, Hyderabad, India
- * E-mail:
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Zhu X, Wang Y, Liu Y, Zhou W, Yan B, Yang J, Shen Y. Overexpression of BcHsfA1 transcription factor from Brassica campestris improved heat tolerance of transgenic tobacco. PLoS One 2018; 13:e0207277. [PMID: 30427910 PMCID: PMC6235349 DOI: 10.1371/journal.pone.0207277] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2018] [Accepted: 10/29/2018] [Indexed: 01/31/2023] Open
Abstract
Heat shock proteins (HSPs) are a type of conserved molecular chaperone. They exist extensively in plants and greatly contribute to their survival under heat stress. The transcriptional regulation factor heat shock factor (HSF) is thought to regulate the expression of Hsps. In this study, a novel gene designated BcHsfA1 was cloned and characterized from Brassica campestris. Bioinformatic analysis implied that BcHsfA1 belongs to the HsfA gene family and is most closely related to HsfA1 from other plants. Constitutive overexpression of BcHsfA1 significantly improved heat tolerance of tobacco seedlings by affecting physiological and biochemical processes. Moreover, the chlorophyll content of transgenic tobacco plants was significantly increased compared with wild type after heat stress, as were the activities of the important enzymatic antioxidants superoxide dismutase and peroxidase. BcHsfA1 overexpression also resulted in decreased malondialdehyde content and comparative electrical conductivity and increased soluble sugar content in transgenic tobacco plants than wild-type plants exposed to heat stress. Furthermore, we identified 11 candidate heat response genes that were significantly up-regulated in the transgenic lines exposed to heat stress. Together, these results suggested that BcHsfA1 is effective in improving heat tolerance of tobacco seedlings, which may be useful in the development of new heat-resisitant B. campestris strains by genetic engineering.
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Affiliation(s)
- Xiangtao Zhu
- College of Jiyang, Zhejiang A&F University, Zhuji,China
| | - Yang Wang
- School of Agriculture and Food Science, Key Laboratory of Agricultural Products Quality Improvement Technology in Zhejiang Province, Zhejiang A&F University, Hangzhou, China
| | - Yunhui Liu
- School of Agriculture and Food Science, Key Laboratory of Agricultural Products Quality Improvement Technology in Zhejiang Province, Zhejiang A&F University, Hangzhou, China
| | - Wei Zhou
- School of Agriculture and Food Science, Key Laboratory of Agricultural Products Quality Improvement Technology in Zhejiang Province, Zhejiang A&F University, Hangzhou, China
| | - Bin Yan
- Laboratory of Plant Biotechnology, College of Life and Environment Sciences, Shanghai Normal University, Shanghai,China
| | - Jian Yang
- Institute of Plant Virology, Ningbo University, Ningbo, China
| | - Yafang Shen
- School of Agriculture and Food Science, Key Laboratory of Agricultural Products Quality Improvement Technology in Zhejiang Province, Zhejiang A&F University, Hangzhou, China
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12
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Rangsrikitphoti P, Durnford DG. Transcriptome Profiling of Bigelowiella natans in Response to Light Stress. J Eukaryot Microbiol 2018; 66:316-333. [PMID: 30055063 DOI: 10.1111/jeu.12672] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2018] [Revised: 06/17/2018] [Accepted: 07/12/2018] [Indexed: 12/13/2022]
Abstract
Bigelowiella natans is a marine chlorarachniophyte whose plastid was acquired secondarily via endosymbiosis with a green alga. During plastid evolution, the photosynthetic endosymbiont would have integrated with the host metabolic pathways. This would require the evolution and coordination of strategies to cope with changes in light intensity that includes changes in the expression of both endosymbiont and host-derived genes. To investigate the transcriptional response to light intensity in chlorarachniophytes, we conducted an RNA-seq experiment to identify differentially expressed genes following a 4-h shift to high or very-low light. A shift to high light altered the expression of over 2,000 genes, many involved with photosynthesis, PSII assembly, primary metabolism, and reactive-oxygen scavenging. These changes are an attempt to optimize photosynthesis and increase energy sinks for excess reductant, while minimizing photooxidative stress. A transfer to very-low light resulted in a lower photosynthetic performance and metabolic alteration, reflecting an energy-limited state. Genes located on the nucleomorph, the vestigial nucleus in the plastid, had few changes in expression in either light treatment, indicating this organelle has relinquished most transcriptional control to the nucleus. Overall, during plastid origin, both host and transferred endosymbiont genes evolved a harmonized transcriptional network to respond to a classic photosynthetic stress.
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Affiliation(s)
| | - Dion G Durnford
- Department of Biology, University of New Brunswick, Fredericton, NB, E3B 5A3, Canada
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13
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Unraveling Field Crops Sensitivity to Heat Stress:Mechanisms, Approaches, and Future Prospects. AGRONOMY-BASEL 2018. [DOI: 10.3390/agronomy8070128] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
The astonishing increase in temperature presents an alarming threat to crop production worldwide. As evident by huge yield decline in various crops, the escalating drastic impacts of heat stress (HS) are putting global food production as well as nutritional security at high risk. HS is a major abiotic stress that influences plant morphology, physiology, reproduction, and productivity worldwide. The physiological and molecular responses to HS are dynamic research areas, and molecular techniques are being adopted for producing heat tolerant crop plants. In this article, we reviewed recent findings, impacts, adoption, and tolerance at the cellular, organellar, and whole plant level and reported several approaches that are used to improve HS tolerance in crop plants. Omics approaches unravel various mechanisms underlying thermotolerance, which is imperative to understand the processes of molecular responses toward HS. Our review about physiological and molecular mechanisms may enlighten ways to develop thermo-tolerant cultivars and to produce crop plants that are agriculturally important in adverse climatic conditions.
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14
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Wang H, Chen Y, Xu B, Hu W, Snider JL, Meng Y, Chen B, Wang Y, Zhao W, Wang S, Zhou Z. Long-term exposure to slightly elevated air temperature alleviates the negative impacts of short term waterlogging stress by altering nitrogen metabolism in cotton leaves. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2018; 123:242-251. [PMID: 29253802 DOI: 10.1016/j.plaphy.2017.12.019] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2017] [Revised: 11/30/2017] [Accepted: 12/11/2017] [Indexed: 05/01/2023]
Abstract
Short-term waterlogging and chronic elevated temperature occur frequently in the Yangtze River Valley, yet the effects of these co-occurring environments on nitrogen metabolism of the subtending leaf (a major source leaf for boll development) have received little attention. In this study, plants were exposed to two temperature regimes (31.6/26.5 °C and 34.1/29.0 °C) and waterlogging events (0 d, 3 d, 6 d) during flowering and boll development. The results showed that the effects of waterlogging stress and elevated temperature in isolation on nitrogen metabolism were quite different. Waterlogging stress not only limited NR (EC 1.6.6.1) and GS (EC 6.3.1.2) activities through the down-regulation of GhNR and GhGS expression for amino acid synthesis, but also promoted protein degradation by enhanced protease activity and peptidase activity, leading to lower organ and total biomass (reduced by 12.01%-27.63%), whereas elevated temperature inhibited protein degradation by limited protease activity and peptidase activity, promoting plant biomass accumulation. Furthermore, 2-3 °C chronic elevated temperature alleviated the negative impacts of a brief (3 d) waterlogging stress on cotton leaves, with the expression of GhNiR up-regulated, the activities of NR, GS and GOGAT (EC 1.4.7.1) increased and the activities of protease and peptidase decreased, leading to higher protein concentration and enhanced leaf biomass for EW3 relative to AW3. The results of the study suggested that exposure to slightly elevated air temperature improves the cotton plants' ability to recover from short-term (3 d) waterlogging stress by sustaining processes associated with nitrogen assimilation.
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Affiliation(s)
- Haimiao Wang
- Key Laboratory of Crop Physiology & Ecology, Ministry of Agriculture, Nanjing Agricultural University, Nanjing 210095, Jiangsu Province, PR China; Department of Crop and Soil Sciences, University of Georgia, Tifton, GA 31794, USA.
| | - Yinglong Chen
- Key Laboratory of Crop Physiology & Ecology, Ministry of Agriculture, Nanjing Agricultural University, Nanjing 210095, Jiangsu Province, PR China.
| | - Bingjie Xu
- Key Laboratory of Crop Physiology & Ecology, Ministry of Agriculture, Nanjing Agricultural University, Nanjing 210095, Jiangsu Province, PR China.
| | - Wei Hu
- Key Laboratory of Crop Physiology & Ecology, Ministry of Agriculture, Nanjing Agricultural University, Nanjing 210095, Jiangsu Province, PR China.
| | - John L Snider
- Department of Crop and Soil Sciences, University of Georgia, Tifton, GA 31794, USA.
| | - Yali Meng
- Key Laboratory of Crop Physiology & Ecology, Ministry of Agriculture, Nanjing Agricultural University, Nanjing 210095, Jiangsu Province, PR China.
| | - Binglin Chen
- Key Laboratory of Crop Physiology & Ecology, Ministry of Agriculture, Nanjing Agricultural University, Nanjing 210095, Jiangsu Province, PR China.
| | - Youhua Wang
- Key Laboratory of Crop Physiology & Ecology, Ministry of Agriculture, Nanjing Agricultural University, Nanjing 210095, Jiangsu Province, PR China.
| | - Wenqing Zhao
- Key Laboratory of Crop Physiology & Ecology, Ministry of Agriculture, Nanjing Agricultural University, Nanjing 210095, Jiangsu Province, PR China.
| | - Shanshan Wang
- Key Laboratory of Crop Physiology & Ecology, Ministry of Agriculture, Nanjing Agricultural University, Nanjing 210095, Jiangsu Province, PR China.
| | - Zhiguo Zhou
- Key Laboratory of Crop Physiology & Ecology, Ministry of Agriculture, Nanjing Agricultural University, Nanjing 210095, Jiangsu Province, PR China.
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15
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Jin Y, Yang S, Im S, Jeong WJ, Park E, Choi DW. Overexpression of the Small Heat Shock Protein, PtsHSP19.3 from Marine Red Algae, Pyropia tenera (Bangiales, Rhodophyta) Enhances Abiotic Stress Tolerance in Chlamydomonas. ACTA ACUST UNITED AC 2017. [DOI: 10.5010/jpb.2017.44.3.287] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- Yujin Jin
- Department of Biology Education and Kumho Life Science Laboratory, Chonnam National University, Gwangju, 61186, Korea
| | - Sungwhan Yang
- Department of Biology Education and Kumho Life Science Laboratory, Chonnam National University, Gwangju, 61186, Korea
| | - Sungoh Im
- Department of Biology Education and Kumho Life Science Laboratory, Chonnam National University, Gwangju, 61186, Korea
| | - Won-Joong Jeong
- Plant Systems Engineering Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon, 34141, Korea
| | - EunJeong Park
- Seaweed Research Center, National Fisheries Research and Development Institute, Mokpo, 58746, Korea
| | - Dong-Woog Choi
- Department of Biology Education and Kumho Life Science Laboratory, Chonnam National University, Gwangju, 61186, Korea
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16
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Wang K, Liu Y, Tian J, Huang K, Shi T, Dai X, Zhang W. Transcriptional Profiling and Identification of Heat-Responsive Genes in Perennial Ryegrass by RNA-Sequencing. FRONTIERS IN PLANT SCIENCE 2017; 8:1032. [PMID: 28680431 PMCID: PMC5478880 DOI: 10.3389/fpls.2017.01032] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2017] [Accepted: 05/29/2017] [Indexed: 05/18/2023]
Abstract
Perennial ryegrass (Lolium perenne) is one of the most widely used forage and turf grasses in the world due to its desirable agronomic qualities. However, as a cool-season perennial grass species, high temperature is a major factor limiting its performance in warmer and transition regions. In this study, a de novo transcriptome was generated using a cDNA library constructed from perennial ryegrass leaves subjected to short-term heat stress treatment. Then the expression profiling and identification of perennial ryegrass heat response genes by digital gene expression analyses was performed. The goal of this work was to produce expression profiles of high temperature stress responsive genes in perennial ryegrass leaves and further identify the potentially important candidate genes with altered levels of transcript, such as those genes involved in transcriptional regulation, antioxidant responses, plant hormones and signal transduction, and cellular metabolism. The de novo assembly of perennial ryegrass transcriptome in this study obtained more total and annotated unigenes compared to previously published ones. Many DEGs identified were genes that are known to respond to heat stress in plants, including HSFs, HSPs, and antioxidant related genes. In the meanwhile, we also identified four gene candidates mainly involved in C4 carbon fixation, and one TOR gene. Their exact roles in plant heat stress response need to dissect further. This study would be important by providing the gene resources for improving heat stress tolerance in both perennial ryegrass and other cool-season perennial grass plants.
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Affiliation(s)
- Kehua Wang
- Department of Grassland Science, China Agricultural UniversityBeijing, China
- *Correspondence: Kehua Wang, Wanjun Zhang,
| | - Yanrong Liu
- Department of Grassland Science, China Agricultural UniversityBeijing, China
| | - Jinli Tian
- Department of Grassland Science, China Agricultural UniversityBeijing, China
| | - Kunyong Huang
- Department of Grassland Science, China Agricultural UniversityBeijing, China
| | - Tianran Shi
- Department of Grassland Science, China Agricultural UniversityBeijing, China
| | - Xiaoxia Dai
- Department of Grassland Science, China Agricultural UniversityBeijing, China
| | - Wanjun Zhang
- Department of Grassland Science, China Agricultural UniversityBeijing, China
- National Energy R&D Center for Biomass, China Agricultural UniversityBeijing, China
- *Correspondence: Kehua Wang, Wanjun Zhang,
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17
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Gottardini E, Cristofori A, Pellegrini E, La Porta N, Nali C, Baldi P, Sablok G. Suppression Substractive Hybridization and NGS Reveal Differential Transcriptome Expression Profiles in Wayfaring Tree (Viburnum lantana L.) Treated with Ozone. FRONTIERS IN PLANT SCIENCE 2016; 7:713. [PMID: 27313581 PMCID: PMC4887494 DOI: 10.3389/fpls.2016.00713] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2015] [Accepted: 05/09/2016] [Indexed: 05/29/2023]
Abstract
Tropospheric ozone (O3) is a global air pollutant that causes high economic damages by decreasing plant productivity. It enters the leaves through the stomata, generates reactive oxygen species, which subsequent decrease in photosynthesis, plant growth, and biomass accumulation. In order to identify genes that are important for conferring O3 tolerance or sensitivity to plants, a suppression subtractive hybridization analysis was performed on the very sensitive woody shrub, Viburnum lantana, exposed to chronic O3 treatment (60 ppb, 5 h d(-1) for 45 consecutive days). Transcript profiling and relative expression assessment were carried out in asymptomatic leaves, after 15 days of O3 exposure. At the end of the experiment symptoms were observed on all treated leaves and plants, with an injured leaf area per plant accounting for 16.7% of the total surface. Cloned genes were sequenced by 454-pyrosequencing and transcript profiling and relative expression assessment were carried out on sequenced reads. A total of 38,800 and 12,495 high quality reads obtained in control and O3-treated libraries, respectively (average length of 319 ± 156.7 and 255 ± 107.4 bp). The Ensembl transcriptome yielded a total of 1241 unigenes with a total sequence length of 389,126 bp and an average length size of 389 bp (guanine-cytosine content = 49.9%). mRNA abundance was measured by reads per kilobase per million and 41 and 37 ensembl unigenes showed up- and down-regulation respectively. Unigenes functionally associated to photosynthesis and carbon utilization were repressed, demonstrating the deleterious effect of O3 exposure. Unigenes functionally associated to heat-shock proteins and glutathione were concurrently induced, suggesting the role of thylakoid-localized proteins and antioxidant-detoxification pathways as an effective strategy for responding to O3. Gene Ontology analysis documented a differential expression of co-regulated transcripts for several functional categories, including specific transcription factors (MYB and WRKY). This study demonstrates that a complex sequence of events takes place in the cells at intracellular and membrane level following O3 exposure and elucidates the effects of this oxidative stress on the transcriptional machinery of the non-model plant species V. lantana, with the final aim to provide the molecular supportive knowledge for the use of this plant as O3-bioindicator.
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Affiliation(s)
- Elena Gottardini
- Fondazione Edmund Mach, Sustainable Agro-Ecosystems and Bioresources Department, Research and Innovation CentreTrento, Italy
| | - Antonella Cristofori
- Fondazione Edmund Mach, Sustainable Agro-Ecosystems and Bioresources Department, Research and Innovation CentreTrento, Italy
| | - Elisa Pellegrini
- Department of Agriculture, Food and Environment, University of PisaPisa, Italy
| | - Nicola La Porta
- Fondazione Edmund Mach, Sustainable Agro-Ecosystems and Bioresources Department, Research and Innovation CentreTrento, Italy
- MOUNTFOR Project Centre, European Forest InstituteTrento, Italy
- Consiglio Nazionale delle Ricerche, Istituto per la Valorizzazione del Legno e delle Specie ArboreeFlorence, Italy
| | - Cristina Nali
- Department of Agriculture, Food and Environment, University of PisaPisa, Italy
| | - Paolo Baldi
- Fondazione Edmund Mach, Genomics and Biology of Fruit Crops Department, Research and Innovation CentreTrento, Italy
| | - Gaurav Sablok
- Fondazione Edmund Mach, Sustainable Agro-Ecosystems and Bioresources Department, Research and Innovation CentreTrento, Italy
- Plant Functional Biology and Climate Change Cluster (C3), University of Technology SydneySydney, NSW, Australia
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18
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Sun AZ, Guo FQ. Chloroplast Retrograde Regulation of Heat Stress Responses in Plants. FRONTIERS IN PLANT SCIENCE 2016; 7:398. [PMID: 27066042 PMCID: PMC4814484 DOI: 10.3389/fpls.2016.00398] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/30/2015] [Accepted: 03/14/2016] [Indexed: 05/19/2023]
Abstract
It is well known that intracellular signaling from chloroplast to nucleus plays a vital role in stress responses to survive environmental perturbations. The chloroplasts were proposed as sensors to heat stress since components of the photosynthetic apparatus housed in the chloroplast are the major targets of thermal damage in plants. Thus, communicating subcellular perturbations to the nucleus is critical during exposure to extreme environmental conditions such as heat stress. By coordinating expression of stress specific nuclear genes essential for adaptive responses to hostile environment, plants optimize different cell functions and activate acclimation responses through retrograde signaling pathways. The efficient communication between plastids and the nucleus is highly required for such diverse metabolic and biosynthetic functions during adaptation processes to environmental stresses. In recent years, several putative retrograde signals released from plastids that regulate nuclear genes have been identified and signaling pathways have been proposed. In this review, we provide an update on retrograde signals derived from tetrapyrroles, carotenoids, reactive oxygen species (ROS) and organellar gene expression (OGE) in the context of heat stress responses and address their roles in retrograde regulation of heat-responsive gene expression, systemic acquired acclimation, and cellular coordination in plants.
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Affiliation(s)
| | - Fang-Qing Guo
- The National Key Laboratory of Plant Molecular Genetics, National Center of Plant Gene Research (Shanghai) and CAS Center for Excellence in Molecular Plant Sciences, Institute of Plant Physiology & Ecology, Shanghai Institutes for Biological Sciences, Chinese Academy of SciencesShanghai, China
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19
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Sun AZ, Guo FQ. Chloroplast Retrograde Regulation of Heat Stress Responses in Plants. FRONTIERS IN PLANT SCIENCE 2016; 7:398. [PMID: 27066042 DOI: 10.3389/fpls.2016.00398/full] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 12/30/2015] [Accepted: 03/14/2016] [Indexed: 05/28/2023]
Abstract
It is well known that intracellular signaling from chloroplast to nucleus plays a vital role in stress responses to survive environmental perturbations. The chloroplasts were proposed as sensors to heat stress since components of the photosynthetic apparatus housed in the chloroplast are the major targets of thermal damage in plants. Thus, communicating subcellular perturbations to the nucleus is critical during exposure to extreme environmental conditions such as heat stress. By coordinating expression of stress specific nuclear genes essential for adaptive responses to hostile environment, plants optimize different cell functions and activate acclimation responses through retrograde signaling pathways. The efficient communication between plastids and the nucleus is highly required for such diverse metabolic and biosynthetic functions during adaptation processes to environmental stresses. In recent years, several putative retrograde signals released from plastids that regulate nuclear genes have been identified and signaling pathways have been proposed. In this review, we provide an update on retrograde signals derived from tetrapyrroles, carotenoids, reactive oxygen species (ROS) and organellar gene expression (OGE) in the context of heat stress responses and address their roles in retrograde regulation of heat-responsive gene expression, systemic acquired acclimation, and cellular coordination in plants.
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Affiliation(s)
- Ai-Zhen Sun
- The National Key Laboratory of Plant Molecular Genetics, National Center of Plant Gene Research (Shanghai) and CAS Center for Excellence in Molecular Plant Sciences, Institute of Plant Physiology & Ecology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences Shanghai, China
| | - Fang-Qing Guo
- The National Key Laboratory of Plant Molecular Genetics, National Center of Plant Gene Research (Shanghai) and CAS Center for Excellence in Molecular Plant Sciences, Institute of Plant Physiology & Ecology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences Shanghai, China
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20
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Rana RM, Khan MA, Shah MK, Ali Z, Zhang H. Insights into the Mechanism of Heat Shock Mitigation Through Protein Repair, Recycling and Degradation. HEAT SHOCK PROTEINS AND PLANTS 2016. [DOI: 10.1007/978-3-319-46340-7_6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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21
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Small Heat Shock Proteins, a Key Player in Grass Plant Thermotolerance. HEAT SHOCK PROTEINS AND PLANTS 2016. [DOI: 10.1007/978-3-319-46340-7_3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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22
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Cha JY, Lee SH, Seo KH, Choi YJ, Cheong MS, Son D. N-terminal arm of orchardgrass Hsp17.2 (DgHsp17.2) is essential for both in vitro chaperone activity and in vivo thermotolerance in yeast. Arch Biochem Biophys 2015; 591:18-27. [PMID: 26724757 DOI: 10.1016/j.abb.2015.12.011] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2015] [Revised: 12/14/2015] [Accepted: 12/22/2015] [Indexed: 11/27/2022]
Abstract
Small heat shock proteins are well-known to function as chaperone in the protection of proteins and subcellular structures against stress-induced denaturation in many cell compartments. Irrespective of such general functional assignment, a proof of function in a living organism is missing. Here, we used heat-induced orchardgrass small Hsp17.2 (DgHsp17.2). Its function in in vitro chaperone properties has shown in protecting the model substrate, malate dehydrogenase (MDH) and citrate synthase (CS). Overexpression of DgHsp17.2 triggering strong chaperone activity enhanced in vivo thermotolerance of yeast cells. To identify the functional domain on DgHsp17.2 and correlationship between in vitro chaperone property and in vivo thermotolerance, we generated truncation mutants of DgHsp17.2 and showed essentiality of the N-terminal arm of DgHsp17.2 for the chaperone function. In addition, beyond for acquisition of thermotolerance irrespective of sequences are diverse among the small Hsps. However, any truncation mutants of DgHsp17.2 did not exhibit strong interaction with orchardgrass heat shock protein 70 (DgHsp70) different from mature DgHsp17.2, indicating that full-length DgHsp17.2 is necessary for cooperating with Hsp70 protein. Our study indicates that the N-terminal arm of DgHsp17.2 is an important region for chaperone activity and thermotolerance.
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Affiliation(s)
- Joon-Yung Cha
- Division of Applied Life Science (BK21 Plus), Plant Molecular Biology and Biotechnology Research Center, Gyeongsang National University, Jinju 660-701, Republic of Korea.
| | - Sang-Hoon Lee
- Grassland & Forages Division, National Institute of Animal Science, Rural Development Administration, Cheonan 330-801, Republic of Korea.
| | - Kyung Hye Seo
- Department of Herbal Crop Research, National Institute of Horticultural & Herbal Science, Eumsung 3369-873, Republic of Korea.
| | - Young Jin Choi
- Division of Applied Life Science (BK21 Plus), Plant Molecular Biology and Biotechnology Research Center, Gyeongsang National University, Jinju 660-701, Republic of Korea.
| | - Mi Sun Cheong
- Division of Applied Life Science (BK21 Plus), Plant Molecular Biology and Biotechnology Research Center, Gyeongsang National University, Jinju 660-701, Republic of Korea.
| | - Daeyoung Son
- Division of Applied Life Science (BK21 Plus), Plant Molecular Biology and Biotechnology Research Center, Gyeongsang National University, Jinju 660-701, Republic of Korea; Department of Plant Medicine, Gyeongsang National University, Jinju 660-701, Republic of Korea.
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23
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Shiraya T, Mori T, Maruyama T, Sasaki M, Takamatsu T, Oikawa K, Itoh K, Kaneko K, Ichikawa H, Mitsui T. Golgi/plastid-type manganese superoxide dismutase involved in heat-stress tolerance during grain filling of rice. PLANT BIOTECHNOLOGY JOURNAL 2015; 13:1251-63. [PMID: 25586098 PMCID: PMC6680209 DOI: 10.1111/pbi.12314] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2014] [Accepted: 11/19/2014] [Indexed: 05/20/2023]
Abstract
Superoxide dismutase (SOD) is widely assumed to play a role in the detoxification of reactive oxygen species caused by environmental stresses. We found a characteristic expression of manganese SOD 1 (MSD1) in a heat-stress-tolerant cultivar of rice (Oryza sativa). The deduced amino acid sequence contains a signal sequence and an N-glycosylation site. Confocal imaging analysis of rice and onion cells transiently expressing MSD1-YFP showed MSD1-YFP in the Golgi apparatus and plastids, indicating that MSD1 is a unique Golgi/plastid-type SOD. To evaluate the involvement of MSD1 in heat-stress tolerance, we generated transgenic rice plants with either constitutive high expression or suppression of MSD1. The grain quality of rice with constitutive high expression of MSD1 grown at 33/28 °C, 12/12 h, was significantly better than that of the wild type. In contrast, MSD1-knock-down rice was markedly susceptible to heat stress. Quantitative shotgun proteomic analysis indicated that the overexpression of MSD1 up-regulated reactive oxygen scavenging, chaperone and quality control systems in rice grains under heat stress. We propose that the Golgi/plastid MSD1 plays an important role in adaptation to heat stress.
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Affiliation(s)
- Takeshi Shiraya
- Department of Applied Biological Chemistry, Niigata University, Niigata, Japan
| | - Taiki Mori
- Graduate School of Science and Technology, Niigata University, Niigata, Japan
| | - Tatsuya Maruyama
- Graduate School of Science and Technology, Niigata University, Niigata, Japan
| | - Maiko Sasaki
- Graduate School of Science and Technology, Niigata University, Niigata, Japan
| | - Takeshi Takamatsu
- Graduate School of Science and Technology, Niigata University, Niigata, Japan
| | - Kazusato Oikawa
- Department of Applied Biological Chemistry, Niigata University, Niigata, Japan
| | - Kimiko Itoh
- Graduate School of Science and Technology, Niigata University, Niigata, Japan
| | - Kentaro Kaneko
- Department of Applied Biological Chemistry, Niigata University, Niigata, Japan
| | - Hiroaki Ichikawa
- Division of Plant Sciences, National Institute of Agrobiological Sciences, Tsukuba, Japan
| | - Toshiaki Mitsui
- Department of Applied Biological Chemistry, Niigata University, Niigata, Japan
- Graduate School of Science and Technology, Niigata University, Niigata, Japan
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24
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Abu-Romman S. Genotypic response to heat stress in durum wheat and the expression of small HSP genes. RENDICONTI LINCEI 2015. [DOI: 10.1007/s12210-015-0471-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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25
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Shen Z, Yao J, Sun J, Chang L, Wang S, Ding M, Qian Z, Zhang H, Zhao N, Sa G, Hou P, Lang T, Wang F, Zhao R, Shen X, Chen S. Populus euphratica HSF binds the promoter of WRKY1 to enhance salt tolerance. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2015; 235:89-100. [PMID: 25900569 DOI: 10.1016/j.plantsci.2015.03.006] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2014] [Revised: 02/02/2015] [Accepted: 03/06/2015] [Indexed: 05/04/2023]
Abstract
Poplar species increase expressions of transcription factors to deal with salt environments. We assessed the salt-induced transcriptional responses of heat-shock transcription factor (HSF) and WRKY1 in Populus euphratica, and their roles in salt tolerance. High NaCl (200mM) induced PeHSF and PeWRKY1 expressions in P. euphratica, with a rapid rise in roots than in leaves. Moreover, the salt-elicited PeHSF reached its peak level 6h earlier than PeWRKY1 in leaves. PeWRKY1 was down-regulated in salinized P. euphratica when PeHSF was silenced by tobacco rattle virus-based gene silencing. Subcellular assays in onion epidermal cells and Arabidopsis protoplasts revealed that PeHSF and PeWRKY1 were restricted to the nucleus. Transgenic tobacco plants overexpressing PeWRKY1 showed improved salt tolerance in terms of survival rate, root growth, photosynthesis, and ion fluxes. We further isolated an 1182-bp promoter fragment upstream of the translational start of PeWRKY1 from P. euphratica. Promoter sequence analysis revealed that PeWRKY1 harbours four tandem repeats of heat shock element (HSE) in the upstream regulatory region. Yeast one-hybrid assay showed that PeHSF directly binds the cis-acting HSE. To determine whether the HSE cluster was important for salt-induced PeWRKY1 expression, the promoter-reporter construct PeWRKY1-pro::GUS was transferred to tobacco plants. β-glucuronidase activities increased in root, leaf, and stem tissues under salt stress. Therefore, we conclude that salinity increased PeHSF transcription in P. euphratica, and that PeHSF binds the cis-acting HSE of the PeWRKY1 promoter, thus activating PeWRKY1 expression.
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Affiliation(s)
- Zedan Shen
- College of Biological Sciences and Technology (Box 162), Beijing Forestry University, Beijing 100083, PR China
| | - Jun Yao
- College of Biological Sciences and Technology (Box 162), Beijing Forestry University, Beijing 100083, PR China
| | - Jian Sun
- Institute of Integrative Plant Biology, School of Life Science, Jiangsu Normal University, Xuzhou 221116, Jiangsu Province, PR China
| | - Liwei Chang
- College of Biological Sciences and Technology (Box 162), Beijing Forestry University, Beijing 100083, PR China
| | - Shaojie Wang
- College of Biological Sciences and Technology (Box 162), Beijing Forestry University, Beijing 100083, PR China
| | - Mingquan Ding
- College of Agricultural and Food Science, Zhejiang Agricultural and Forestry University, Hangzhou, Zhejiang 311300, PR China
| | - Zeyong Qian
- College of Biological Sciences and Technology (Box 162), Beijing Forestry University, Beijing 100083, PR China
| | - Huilong Zhang
- College of Biological Sciences and Technology (Box 162), Beijing Forestry University, Beijing 100083, PR China
| | - Nan Zhao
- College of Biological Sciences and Technology (Box 162), Beijing Forestry University, Beijing 100083, PR China
| | - Gang Sa
- College of Biological Sciences and Technology (Box 162), Beijing Forestry University, Beijing 100083, PR China
| | - Peichen Hou
- National Engineering Research Center for Information Technology in Agriculture, Beijing 100097, PR China
| | - Tao Lang
- College of Biological Sciences and Technology (Box 162), Beijing Forestry University, Beijing 100083, PR China
| | - Feifei Wang
- College of Biological Sciences and Technology (Box 162), Beijing Forestry University, Beijing 100083, PR China
| | - Rui Zhao
- College of Biological Sciences and Technology (Box 162), Beijing Forestry University, Beijing 100083, PR China
| | - Xin Shen
- College of Biological Sciences and Technology (Box 162), Beijing Forestry University, Beijing 100083, PR China
| | - Shaoliang Chen
- College of Biological Sciences and Technology (Box 162), Beijing Forestry University, Beijing 100083, PR China.
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Mani N, Ramakrishna K, Suguna K. Characterization of rice small heat shock proteins targeted to different cellular organelles. Cell Stress Chaperones 2015; 20:451-60. [PMID: 25624002 PMCID: PMC4406937 DOI: 10.1007/s12192-015-0570-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2014] [Revised: 01/02/2015] [Accepted: 01/06/2015] [Indexed: 12/11/2022] Open
Abstract
Small heat shock proteins (sHSPs) are a family of ATP-independent molecular chaperones which prevent cellular protein aggregation by binding to misfolded proteins. sHSPs form large oligomers that undergo drastic rearrangement/dissociation in order to execute their chaperone activity in protecting substrates from stress. Substrate-binding sites on sHSPs have been predominantly mapped on their intrinsically disordered N-terminal arms. This region is highly variable in sequence and length across species, and has been implicated in both oligomer formation and in mediating chaperone activity. Here, we present our results on the functional and structural characterization of five sHSPs in rice, each differing in their subcellular localisation, viz., cytoplasm, nucleus, chloroplast, mitochondria and peroxisome. We performed activity assays and dynamic light scattering studies to highlight differences in the chaperone activity and quaternary assembly of sHSPs targeted to various organelles. By cloning constructs that differ in the length and sequence of the tag in the N-terminal region, we have probed the sensitivity of sHSP oligomer assembly and chaperone activity to the length and amino acid composition of the N-terminus. In particular, we have shown that the incorporation of an N-terminal tag has significant consequences on sHSP quaternary structure.
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Affiliation(s)
- Nandini Mani
- Molecular Biophysics Unit, Indian Institute of Science, Bangalore, Karnataka 560012 India
| | | | - Kaza Suguna
- Molecular Biophysics Unit, Indian Institute of Science, Bangalore, Karnataka 560012 India
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Protein sHSP26 improves chloroplast performance under heat stress by interacting with specific chloroplast proteins in maize (Zea mays). J Proteomics 2014; 115:81-92. [PMID: 25540934 DOI: 10.1016/j.jprot.2014.12.009] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2014] [Revised: 12/05/2014] [Accepted: 12/12/2014] [Indexed: 01/30/2023]
Abstract
UNLABELLED We recently demonstrated that chloroplast small HSP26 (sHSP26) is abundant in maize leaves under heat stress and potentially involved in maize heat tolerance. However, it largely remains unclear how sHSP26 functions in maize under heat stress. Here, 2-DE-based proteomics, RNA interference (RNAi), co-immunoprecipitation (Co-IP) and yeast two-hybrid (Y2H) were used to reveal chloroplast proteins interacting with sHSP26 and how sHSP26 functions under heat stress. After the silencing of sHSP26, a total of 45 protein spots from isolated protoplasts were greatly changed in abundance, of which 33 spots are chloroplastic. Co-IP revealed that nine proteins possibly associated with sHSP26. Y2H demonstrated that six chloroplast proteins interact with sHSP26 under heat stress. In particular, four proteins, including ATP synthase subunit β, chlorophyll a-b binding protein, oxygen-evolving enhancer protein 1 and photosystem I reaction center subunit IV, strongly interacted with sHSP26 and their abundance greatly declined after RNAi of sHSP26 under heat stress. In addition, H2O2 accumulation in the chloroplasts significantly increased the expression of sHSP26, and the suppression of sHSP26 expression significantly reduced the O2 evolution rate of photosystem II under heat stress. Overall, these findings demonstrate the relevance of sHSP26 in protecting maize chloroplasts under heat stress. BIOLOGICAL SIGNIFICANCE Maize is one of the most important crops worldwide. Frequent heat stress reduces significantly the yield and quality of maize. Our results demonstrated that sHSP26 improved maize chloroplast performance under heat stress by interacting with specific proteins. These findings are useful for understanding the mechanism of heat stress response and heat-tolerant molecular breeding in maize.
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Chen X, Lin S, Liu Q, Huang J, Zhang W, Lin J, Wang Y, Ke Y, He H. Expression and interaction of small heat shock proteins (sHsps) in rice in response to heat stress. BIOCHIMICA ET BIOPHYSICA ACTA-PROTEINS AND PROTEOMICS 2014; 1844:818-28. [DOI: 10.1016/j.bbapap.2014.02.010] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2014] [Accepted: 02/12/2014] [Indexed: 11/24/2022]
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Mu C, Zhang S, Yu G, Chen N, Li X, Liu H. Overexpression of small heat shock protein LimHSP16.45 in Arabidopsis enhances tolerance to abiotic stresses. PLoS One 2013; 8:e82264. [PMID: 24349240 PMCID: PMC3862632 DOI: 10.1371/journal.pone.0082264] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2013] [Accepted: 10/31/2013] [Indexed: 11/19/2022] Open
Abstract
Small heat shock proteins (smHSPs) play important and extensive roles in plant defenses against abiotic stresses. We cloned a gene for a smHSP from the David Lily (Lilium davidii (E. H. Wilson) Raffill var. Willmottiae), which we named LimHSP16.45 based on its protein molecular weight. Its expression was induced by many kinds of abiotic stresses in both the lily and transgenic plants of Arabidopsis. Heterologous expression enhanced cell viability of the latter under high temperatures, high salt, and oxidative stress, and heat shock granules (HSGs) formed under heat or salinity treatment. Assays of enzymes showed that LimHSP16.45 overexpression was related to greater activity by superoxide dismutase and catalase in transgenic lines. Therefore, we conclude that heterologous expression can protect plants against abiotic stresses by preventing irreversible protein aggregation, and by scavenging cellular reactive oxygen species.
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Affiliation(s)
- Changjun Mu
- Institute of Cell Biology, School of Life Sciences, Lanzhou University, Lanzhou, P.R. China
| | - Shijia Zhang
- Institute of Cell Biology, School of Life Sciences, Lanzhou University, Lanzhou, P.R. China
| | - Guanzhong Yu
- Institute of Cell Biology, School of Life Sciences, Lanzhou University, Lanzhou, P.R. China
| | - Ni Chen
- Institute of Cell Biology, School of Life Sciences, Lanzhou University, Lanzhou, P.R. China
| | - Xiaofeng Li
- Institute of Cell Biology, School of Life Sciences, Lanzhou University, Lanzhou, P.R. China
| | - Heng Liu
- Institute of Cell Biology, School of Life Sciences, Lanzhou University, Lanzhou, P.R. China
- * E-mail:
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Hasanuzzaman M, Nahar K, Alam MM, Roychowdhury R, Fujita M. Physiological, biochemical, and molecular mechanisms of heat stress tolerance in plants. Int J Mol Sci 2013; 14:9643-84. [PMID: 23644891 PMCID: PMC3676804 DOI: 10.3390/ijms14059643] [Citation(s) in RCA: 669] [Impact Index Per Article: 60.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2013] [Revised: 04/16/2013] [Accepted: 04/19/2013] [Indexed: 12/02/2022] Open
Abstract
High temperature (HT) stress is a major environmental stress that limits plant growth, metabolism, and productivity worldwide. Plant growth and development involve numerous biochemical reactions that are sensitive to temperature. Plant responses to HT vary with the degree and duration of HT and the plant type. HT is now a major concern for crop production and approaches for sustaining high yields of crop plants under HT stress are important agricultural goals. Plants possess a number of adaptive, avoidance, or acclimation mechanisms to cope with HT situations. In addition, major tolerance mechanisms that employ ion transporters, proteins, osmoprotectants, antioxidants, and other factors involved in signaling cascades and transcriptional control are activated to offset stress-induced biochemical and physiological alterations. Plant survival under HT stress depends on the ability to perceive the HT stimulus, generate and transmit the signal, and initiate appropriate physiological and biochemical changes. HT-induced gene expression and metabolite synthesis also substantially improve tolerance. The physiological and biochemical responses to heat stress are active research areas, and the molecular approaches are being adopted for developing HT tolerance in plants. This article reviews the recent findings on responses, adaptation, and tolerance to HT at the cellular, organellar, and whole plant levels and describes various approaches being taken to enhance thermotolerance in plants.
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Affiliation(s)
- Mirza Hasanuzzaman
- Department of Agronomy, Faculty of Agriculture, Sher-e-Bangla Agricultural University, Dhaka 1207, Bangladesh
| | - Kamrun Nahar
- Laboratory of Plant Stress Responses, Department of Applied Biological Science, Faculty of Agriculture, Kagawa University, Miki-cho, Kita-gun, Kagawa 761-0795, Japan; E-Mails: (K.N.); (M.M.A.)
- Department of Agricultural Botany, Faculty of Agriculture, Sher-e-Bangla Agricultural University, Sher-e-Bangla Nagar, Dhaka 1207, Bangladesh
| | - Md. Mahabub Alam
- Laboratory of Plant Stress Responses, Department of Applied Biological Science, Faculty of Agriculture, Kagawa University, Miki-cho, Kita-gun, Kagawa 761-0795, Japan; E-Mails: (K.N.); (M.M.A.)
| | - Rajib Roychowdhury
- Department of Biotechnology, Visva-Bharati University, Santiniketan 731235, West Bengal, India; E-Mail:
| | - Masayuki Fujita
- Laboratory of Plant Stress Responses, Department of Applied Biological Science, Faculty of Agriculture, Kagawa University, Miki-cho, Kita-gun, Kagawa 761-0795, Japan; E-Mails: (K.N.); (M.M.A.)
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Khurana N, Chauhan H, Khurana P. Wheat chloroplast targeted sHSP26 promoter confers heat and abiotic stress inducible expression in transgenic Arabidopsis Plants. PLoS One 2013; 8:e54418. [PMID: 23349883 PMCID: PMC3548792 DOI: 10.1371/journal.pone.0054418] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2012] [Accepted: 12/11/2012] [Indexed: 01/03/2023] Open
Abstract
The small heat shock proteins (sHSPs) have been found to play a critical role in physiological stress conditions in protecting proteins from irreversible aggregation. To characterize the hloroplast targeted sHSP26 promoter in detail, deletion analysis of the promoter is carried out and analysed via transgenics in Arabidopsis. In the present study, complete assessment of the importance of CCAAT-box elements along with Heat shock elements (HSEs) in the promoter of sHSP26 was performed. Moreover, the importance of 5' untranslated region (UTR) has also been established in the promoter via Arabidopsis transgenics. An intense GUS expression was observed after heat stress in the transgenics harbouring a full-length promoter, confirming the heat-stress inducibility of the promoter. Transgenic plants without UTR showed reduced GUS expression when compared to transgenic plants with UTR as was confirmed at the RNA and protein levels by qRT-PCR and GUS histochemical assays, thus suggesting the possible involvement of some regulatory elements present in the UTR in heat-stress inducibility of the promoter. Promoter activity was also checked under different abiotic stresses and revealed differential expression in different deletion constructs. Promoter analysis based on histochemical assay, real-time qPCR and fluorimetric analysis revealed that HSEs alone could not transcribe GUS gene significantly in sHSP26 promoter and CCAAT box elements contribute synergistically to the transcription. Our results also provide insight into the importance of 5`UTR of sHsp26 promoter thus emphasizing the probable role of imperfect CCAAT-box element or some novel cis-element with respect to heat stress.
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Affiliation(s)
- Neetika Khurana
- Department of Plant Molecular Biology, University of Delhi, South Campus, New Delhi, India
| | - Harsh Chauhan
- Department of Plant Molecular Biology, University of Delhi, South Campus, New Delhi, India
| | - Paramjit Khurana
- Department of Plant Molecular Biology, University of Delhi, South Campus, New Delhi, India
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Hue NT, Tran HT, Phan T, Nakamura J, Iwata T, Harano K, Ishibashi Y, Yuasa T, Iwaya-Inoue M. Hsp90 and reactive oxygen species regulate thermotolerance of rice seedlings via induction of heat shock factor A2 (OsHSFA2) and galactinol synthase 1 (OsGolS1). ACTA ACUST UNITED AC 2013. [DOI: 10.4236/as.2013.43023] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Chauhan H, Khurana N, Nijhavan A, Khurana JP, Khurana P. The wheat chloroplastic small heat shock protein (sHSP26) is involved in seed maturation and germination and imparts tolerance to heat stress. PLANT, CELL & ENVIRONMENT 2012; 35:1912-31. [PMID: 22530593 DOI: 10.1111/j.1365-3040.2012.02525.x] [Citation(s) in RCA: 103] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
The nuclear-encoded chloroplast small heat shock proteins (sHSPs) are present in all plant species from algae to angiosperms. Expression analysis shows that the wheat chloroplastic sHSP (HSP26) is highly inducible by heat stress in almost all the vegetative and generative tissues and is also expressed constitutively in certain developmental growth stages. We characterize wheat chloroplastic sHSP 26 through transgenic approach using Arabidopsis and report cloning of the promoter and its characterization. Transgenic Arabidopsis plants were substantially tolerant under continuous high temperature regimen than wild-type plants, as measured by photosystem II (PSII) activity, accumulation of more photosynthetic pigments, higher biomass and seed yield. Transgenic plants produced bold seeds under high temperature, having higher germination potential than the wild-type plants. Further, antisense Arabidopsis plants showed negligible tolerance even for non-lethal heat shock, impaired in basal thermo-tolerance, and accumulated less biomass and seed yield under normal growth conditions. Promoter analysis revealed the presence of several heat and other abiotic stress responsive cis-acting elements along with developmental stage and tissue-specific elements. Analysis of promoter through GUS reporter system in both transgenic rice and Arabidopsis further confirms the role of chloroplastic sHsp26 in heat and other abiotic stresses as well as during seed maturation and germination. Genome-wide expression analysis of overexpression Arabidopsis plants revealed that the transcriptome remained unchanged in the transgenic plants and the tolerance was due to the overexpression of chloroplastic heat shock protein (HSP) only.
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Affiliation(s)
- Harsh Chauhan
- Department of Plant Molecular Biology, University of Delhi, South Campus, Benito Juarez Road, Dhaula Kuan, New Delhi 110 021, India
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Wang D, Adams CM, Fernandes JF, Egger RL, Walbot V. A low molecular weight proteome comparison of fertile and male sterile 8 anthers of Zea mays. PLANT BIOTECHNOLOGY JOURNAL 2012; 10:925-35. [PMID: 22748129 PMCID: PMC4144787 DOI: 10.1111/j.1467-7652.2012.00721.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
During maize anther development, somatic locular cells differentiate to support meiosis in the pollen mother cells. Meiosis is an important event during anther growth and is essential for plant fertility as pollen contains the haploid sperm. A subset of maize male sterile mutants exhibit meiotic failure, including ms8 (male sterile 8) in which meiocytes arrest as dyads and the locular somatic cells exhibit multiple defects. Systematic proteomic profiles were analysed in biological triplicates plus technical triplicates comparing ms8 anthers with fertile sibling samples at both the premeiotic and meiotic stages; proteins from 3.5 to 20 kDa were fractionated by 1-D PAGE, cleaved with Lys-C and then sequenced using a LTQ Orbitrap Velos MS paradigm. Three hundred and 59 proteins were identified with two or more assigned peptides in which each of those peptides were counted at least two or more times (0.4% peptide false discovery rate (FDR) and 0.2% protein FDR); 2761 proteins were identified with one or more assigned peptides (0.4% peptide FDR and 7.6% protein FDR). Stage-specific protein expression provides candidate stage markers for early anther development, and proteins specifically expressed in fertile compared to sterile anthers provide important clues about the regulation of meiosis. 49% of the proteins detected by this study are new to an independent whole anther proteome, and many small proteins missed by automated maize genome annotation were validated; these outcomes indicate the value of focusing on low molecular weight proteins. The roles of distinctive expressed proteins and methods for mass spectrometry of low molecular weight proteins are discussed.
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Affiliation(s)
- Dongxue Wang
- Department of Biology, Stanford University, Stanford, CA, USA.
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35
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Shakeel SN, Ul Haq N, Heckathorn S, Luthe DS. Analysis of gene sequences indicates that quantity not quality of chloroplast small HSPs improves thermotolerance in C4 and CAM plants. PLANT CELL REPORTS 2012; 31:1943-1957. [PMID: 22797908 DOI: 10.1007/s00299-012-1307-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2012] [Revised: 06/07/2012] [Accepted: 06/19/2012] [Indexed: 06/01/2023]
Abstract
Chloroplast-localized small heat-shock proteins (Cp-sHSP) protect Photosystem II and thylakoid membranes during heat and other stresses, and Cp-sHSP production levels are related to plant thermotolerance. However, to date, a paucity of Cp-sHSP sequences from C4 or CAM species, or from other extremely heat-tolerant species, has precluded an examination to determine if Cp-sHSP genes or proteins might differ among plants with photosynthetic pathways or between heat-sensitive and heat-tolerant species. To investigate this, we isolated and characterized novel Cp-sHSP genes in four plant species: two moderately heat-tolerant C4 species, Spartina alterniflora (monocot) and Amaranthus retroflexus (eudicot), and two very heat-tolerant CAM species, Agave americana (monocot) and Ferocactus wislizenii (eudicot) (respective genes: SasHSP27.12, ArsHSP26.43, AasHSP26.85 and FwsHSP27.52) by PCR-based genome walking and cDNA RACE. Analysis of these Cp-sHSPs has confirmed the presence of conserved domains common to previously examined species. As expected, the transit peptide was found to be the most variable part of these proteins. Promoter analysis of these genes revealed differences in CAM versus C3 and C4 species that were independent of a general difference between monocots and eudicots observed for the entire protein. Heat-induced gene and protein expression indicated that Cp-sHSP protein levels were correlated with thermotolerance of photosynthetic electron transport, and that in most cases protein and transcript levels were correlated. Thus, available evidence indicates little variation in the amino acid sequence of Cp-sHSP mature proteins between heat-sensitive and -tolerant species, but that variation in Cp-sHSP protein production is related to heat tolerance or photosynthetic pathway (CAM vs. C3 and C4) and is driven by promoter differences. Key message We isolated and characterized four novel Cp-sHSP genes with promoters from wild plants, analysis has shown qualitative and quantitative interspecific variations in Cp-sHSPs of C3, C4, and CAM plant thermotolerance.
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MESH Headings
- Adaptation, Physiological
- Agave/genetics
- Agave/physiology
- Amaranthus/genetics
- Amaranthus/physiology
- Amino Acid Sequence
- Chloroplast Proteins/genetics
- Chloroplast Proteins/metabolism
- Chloroplasts/genetics
- Chloroplasts/physiology
- Conserved Sequence
- DNA, Complementary/genetics
- DNA, Complementary/metabolism
- Genes, Chloroplast
- Genes, Plant
- Genomics/methods
- Heat-Shock Proteins, Small/genetics
- Heat-Shock Proteins, Small/metabolism
- Hot Temperature
- Molecular Sequence Data
- Photosynthesis
- Photosystem II Protein Complex/genetics
- Photosystem II Protein Complex/physiology
- Phylogeny
- Polymerase Chain Reaction
- Promoter Regions, Genetic
- Protein Biosynthesis
- Protein Structure, Tertiary
- Sequence Analysis, DNA
- Sequence Analysis, Protein/methods
- Species Specificity
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Affiliation(s)
- Samina N Shakeel
- Department of Biochemistry and Molecular Biology, Mississippi State University, Starkville, MS, USA.
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36
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Mittal D, Madhyastha DA, Grover A. Genome-wide transcriptional profiles during temperature and oxidative stress reveal coordinated expression patterns and overlapping regulons in rice. PLoS One 2012; 7:e40899. [PMID: 22815860 PMCID: PMC3397947 DOI: 10.1371/journal.pone.0040899] [Citation(s) in RCA: 72] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2012] [Accepted: 06/14/2012] [Indexed: 11/19/2022] Open
Abstract
Genome wide transcriptional changes by cold stress, heat stress and oxidative stress in rice seedlings were analyzed. Heat stress resulted in predominant changes in transcripts of heat shock protein and heat shock transcription factor genes, as well as genes associated with synthesis of scavengers of reactive oxygen species and genes that control the level of sugars, metabolites and auxins. Cold stress treatment caused differential expression of transcripts of various transcription factors including desiccation response element binding proteins and different kinases. Transcripts of genes that are part of calcium signaling, reactive oxygen scavenging and diverse metabolic reactions were differentially expressed during cold stress. Oxidative stress induced by hydrogen peroxide treatment, resulted in significant up-regulation in transcript levels of genes related to redox homeostasis and down-regulation of transporter proteins. ROS homeostasis appeared to play central role in response to temperature extremes. The key transcription factors that may underlie the concerted transcriptional changes of specific components in various signal transduction networks involved are highlighted. Co-ordinated expression pattern and promoter architectures based analysis (promoter models and overrepresented transcription factor binding sites) suggested potential regulons involved in stress responses. A considerable overlap was noted at the level of transcription as well as in regulatory modules of differentially expressed genes.
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Affiliation(s)
- Dheeraj Mittal
- Department of Plant Molecular Biology, University of Delhi South Campus, New Delhi, India
| | | | - Anil Grover
- Department of Plant Molecular Biology, University of Delhi South Campus, New Delhi, India
- * E-mail:
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37
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Sadiq I, Fanucchi F, Paparelli E, Alpi E, Bachi A, Alpi A, Perata P. Proteomic identification of differentially expressed proteins in the anoxic rice coleoptile. JOURNAL OF PLANT PHYSIOLOGY 2011; 168:2234-43. [PMID: 21920630 DOI: 10.1016/j.jplph.2011.07.009] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2011] [Revised: 07/21/2011] [Accepted: 07/21/2011] [Indexed: 05/22/2023]
Abstract
Rice is the staple food for more than fifty percent of the world's population, and is therefore an important crop. However, its production is hindered by several biotic and abiotic stresses. Although rice is the only crop that can germinate even in the complete absence of oxygen (i.e. anoxia), flooding (low oxygen) is one of the major causes of reduced rice production. Rice germination under anoxia is characterized by the elongation of the coleoptile, but leaf growth is hampered. In this work, a comparative proteomic approach was used to detect and identify differentially expressed proteins in the anoxic rice coleoptile compared to the aerobic coleoptile. Thirty-one spots were successfully identified by MALDI-TOF MS analysis. The majority of the identified proteins were related to stress responses and redox metabolism. The expression levels of twenty-three proteins and their respective mRNAs were analyzed in a time course experiment.
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Affiliation(s)
- Irfan Sadiq
- Plant Lab, Institute of Life Sciences, Scuola Superiore Sant'Anna, Pisa, Italy
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38
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Kim KH, Alam I, Kim YG, Sharmin SA, Lee KW, Lee SH, Lee BH. Overexpression of a chloroplast-localized small heat shock protein OsHSP26 confers enhanced tolerance against oxidative and heat stresses in tall fescue. Biotechnol Lett 2011; 34:371-7. [DOI: 10.1007/s10529-011-0769-3] [Citation(s) in RCA: 75] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2011] [Accepted: 09/26/2011] [Indexed: 12/13/2022]
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Mu C, Wang S, Zhang S, Pan J, Chen N, Li X, Wang Z, Liu H. Small heat shock protein LimHSP16.45 protects pollen mother cells and tapetal cells against extreme temperatures during late zygotene to pachytene stages of meiotic prophase I in David Lily. PLANT CELL REPORTS 2011; 30:1981-9. [PMID: 21678060 DOI: 10.1007/s00299-011-1106-y] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2011] [Revised: 06/02/2011] [Accepted: 06/03/2011] [Indexed: 05/08/2023]
Abstract
Plant meiotic prophase I is a complicated process involving the late zygotene and pachytene stages, both crucial for completing synapsis and recombination. Using David Lily (Lilium davidii var. Willmottiae) as our research material, we performed suppression subtractive hybridization to construct EST library of anthers at various stages of development by the pollen mother cells. From this library, we identified small heat shock protein LimHSP16.45 was highly expressed during the late zygotene to pachytene stages. Our results also showed that LimHSP16.45 was almost specifically expressed in the anther compared with the root, stem, or leaf, and in situ expression of LimHSP16.45 mRNAs showed strong signals in the pollen mother cells and tapetal cells. LimHSP16.45 could be induced by heat and cold in lily anthers, and its ectopic expression enhanced the viability of E. coli cells under both high and low temperatures. In vitro, it acted as molecular chaperone and could help luciferase refolding after heat shock stress. All of these data suggest that LimHSP16.45, working as molecular chaperone, possibly protects pollen mother cells and tapetal cells against extreme temperatures during late zygotene to pachytene stages of meiotic prophase I in David Lily.
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Affiliation(s)
- Changjun Mu
- Institute of Cell Biology, School of Life Sciences, Lanzhou University, Lanzhou, 730000, People's Republic of China
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40
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Al-Whaibi MH. Plant heat-shock proteins: A mini review. JOURNAL OF KING SAUD UNIVERSITY - SCIENCE 2011. [PMID: 0 DOI: 10.1016/j.jksus.2010.06.022] [Citation(s) in RCA: 229] [Impact Index Per Article: 17.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
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41
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Heat shock proteins in association with heat tolerance in grasses. INTERNATIONAL JOURNAL OF PROTEOMICS 2011; 2011:529648. [PMID: 22084689 PMCID: PMC3200123 DOI: 10.1155/2011/529648] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/19/2010] [Accepted: 01/14/2011] [Indexed: 11/29/2022]
Abstract
The grass family Poaceae includes annual species cultivated as major grain crops and perennial species cultivated as forage or turf grasses. Heat stress is a primary factor limiting growth and productivity of cool-season grass species and is becoming a more significant problem in the context of global warming. Plants have developed various mechanisms in heat-stress adaptation, including changes in protein metabolism such as the induction of heat shock proteins (HSPs). This paper summarizes the structure and function of major HSPs, recent research progress on the association of HSPs with grass tolerance to heat stress, and incorporation of HSPs in heat-tolerant grass breeding.
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Expression characteristics of heat shock protein genes in two comparable inbred lines of Chinese cabbage, Chiifu and Kenshin. Genes Genomics 2010. [DOI: 10.1007/s13258-010-0004-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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Mittal D, Chakrabarti S, Sarkar A, Singh A, Grover A. Heat shock factor gene family in rice: genomic organization and transcript expression profiling in response to high temperature, low temperature and oxidative stresses. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2009; 47:785-95. [PMID: 19539489 DOI: 10.1016/j.plaphy.2009.05.003] [Citation(s) in RCA: 118] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2009] [Revised: 05/05/2009] [Accepted: 05/19/2009] [Indexed: 05/04/2023]
Abstract
Binding of heat shock factors (HSFs) with heat shock element sequence is critical for the transcriptional induction of heat shock genes. Rice genome sequence shows 26 OsHsf genes out of which 25 possess various important domains noted in HSFs i.e. DNA binding domain (DBD), oligomerization domain (OD), nuclear localization signal (NLS), nuclear export signal (NES) and AHA type activation domain. OsHsf entry LOC_Os06g226100 has the oligomerization domain but lacks the above other domains. Also, there are no ESTs or full-length cDNA noted for this entry in database. Expression profiling showed that 22 OsHsf genes are induced by high temperature. Induction of 10 and 14 OsHsf genes was also noted against low temperature stress and oxidative stress, respectively. All OsHsf genes induced by oxidative stress were also induced by high temperature. On the other hand, induction of 6 and 1 OsHsf genes was noted to be exclusive to high and low temperature stresses, respectively. Seven OsHsf genes showed induced expression in response to all the three stresses examined. While in silico promoter analysis showed that OsHsf genes contain upstream regulatory elements corresponding to different abiotic stresses, there was lack of correlation noted between the in silico profiling of the elements and their corresponding transcript expression patterns. Apart from stress inducibility, EST database suggests that various OsHsf genes are developmentally regulated in diverse tissue types.
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Affiliation(s)
- Dheeraj Mittal
- Department of Plant Molecular Biology, University of Delhi South Campus, Benito Juarez Road, New Delhi-110021, India
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Sarkar NK, Kim YK, Grover A. Rice sHsp genes: genomic organization and expression profiling under stress and development. BMC Genomics 2009; 10:393. [PMID: 19703271 PMCID: PMC2746236 DOI: 10.1186/1471-2164-10-393] [Citation(s) in RCA: 169] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2009] [Accepted: 08/24/2009] [Indexed: 12/29/2022] Open
Abstract
Background Heat shock proteins (Hsps) constitute an important component in the heat shock response of all living systems. Among the various plant Hsps (i.e. Hsp100, Hsp90, Hsp70 and Hsp20), Hsp20 or small Hsps (sHsps) are expressed in maximal amounts under high temperature stress. The characteristic feature of the sHsps is the presence of α-crystallin domain (ACD) at the C-terminus. sHsps cooperate with Hsp100/Hsp70 and co-chaperones in ATP-dependent manner in preventing aggregation of cellular proteins and in their subsequent refolding. Database search was performed to investigate the sHsp gene family across rice genome sequence followed by comprehensive expression analysis of these genes. Results We identified 40 α-crystallin domain containing genes in rice. Phylogenetic analysis showed that 23 out of these 40 genes constitute sHsps. The additional 17 genes containing ACD clustered with Acd proteins of Arabidopsis. Detailed scrutiny of 23 sHsp sequences enabled us to categorize these proteins in a revised scheme of classification constituting of 16 cytoplasmic/nuclear, 2 ER, 3 mitochondrial, 1 plastid and 1 peroxisomal genes. In the new classification proposed herein nucleo-cytoplasmic class of sHsps with 9 subfamilies is more complex in rice than in Arabidopsis. Strikingly, 17 of 23 rice sHsp genes were noted to be intronless. Expression analysis based on microarray and RT-PCR showed that 19 sHsp genes were upregulated by high temperature stress. Besides heat stress, expression of sHsp genes was up or downregulated by other abiotic and biotic stresses. In addition to stress regulation, various sHsp genes were differentially upregulated at different developmental stages of the rice plant. Majority of sHsp genes were expressed in seed. Conclusion We identified twenty three sHsp genes and seventeen Acd genes in rice. Three nucleocytoplasmic sHsp genes were found only in monocots. Analysis of expression profiling of sHsp genes revealed that these genes are differentially expressed under stress and at different stages in the life cycle of rice plant.
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Affiliation(s)
- Neelam K Sarkar
- Department of Plant Molecular Biology, University of Delhi South Campus, N Delhi 110021, India.
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Jiang C, Xu J, Zhang H, Zhang X, Shi J, Li M, Ming F. A cytosolic class I small heat shock protein, RcHSP17.8, of Rosa chinensis confers resistance to a variety of stresses to Escherichia coli, yeast and Arabidopsis thaliana. PLANT, CELL & ENVIRONMENT 2009; 32:1046-59. [PMID: 19422616 DOI: 10.1111/j.1365-3040.2009.01987.x] [Citation(s) in RCA: 88] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Among the heat shock proteins (HSPs) of higher plants, those belonging to the small HSP (sHSP) family remain the least characterized in functional terms. To improve our understanding of sHSPs, we have characterized RcHSP17.8 from Rosa chinensis. Sequence alignments and phylogenetic analysis reveal this to be a cytosolic class I sHSP. RcHSP17.8 expression in R. chinensis was induced by heat, cold, salt, drought, osmotic and oxidative stresses. Recombinant RcHSP17.8 was overexpressed in Escherichia coli and yeast to study its possible function under stress conditions. The recombinant E. coli and yeast cells that accumulated RcHSP17.8 showed improved viability under thermal, salt and oxidative stress conditions compared with control cultures. We also produced transgenic Arabidopsis thaliana that constitutively expressed RcHSP17.8. These plants exhibited increased tolerance to heat, salt, osmotic and drought stresses. These results suggest that R. chinensis cytosolic class I sHSP (RcHSP17.8) has the ability to confer stress resistance not only to E. coli and yeast but also to plants grown under a wide variety of unfavorable environmental conditions.
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Affiliation(s)
- Changhua Jiang
- State Key Laboratory of Genetic Engineering, Institute of Genetics, School of Life Science, Fudan University, 220 Handan Road, Shanghai 200433, China
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Zou J, Liu A, Chen X, Zhou X, Gao G, Wang W, Zhang X. Expression analysis of nine rice heat shock protein genes under abiotic stresses and ABA treatment. JOURNAL OF PLANT PHYSIOLOGY 2009; 166:851-61. [PMID: 19135278 DOI: 10.1016/j.jplph.2008.11.007] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2008] [Revised: 11/04/2008] [Accepted: 11/04/2008] [Indexed: 05/03/2023]
Abstract
Expression profiles of nine rice heat shock protein genes (OsHSPs) were analyzed by semi-quantitative reverse transcriptase polymerase chain reaction (RT-PCR). The nine genes exhibited distinctive expression in different organs. Expression of nine OsHSP genes was affected differentially by abiotic stresses and abscisic acid (ABA). All nine OsHSP genes were induced strongly by heat shock treatment, whereas none of them were induced by cold. The transcripts of OsHSP80.2, OsHSP71.1 and OsHSP23.7 were increased during salt tress treatment. Expression of OsHSP80.2 and OsHSP24.1 genes were enhanced while treated with 10% PEG. Only OsHSP71.1 was induced by ABA while OsHSP24.1 was suppressed by ABA. These observations imply that the nine OsHSP genes may play different roles in plant development and abiotic stress responses.
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Affiliation(s)
- Jie Zou
- Crop Gene Engineering Key Laboratory of Hunan Province, Hunan Agricultural University, Changsha 410128, China; College of Bioscience and Biotechnology, Hunan Agricultural University, Changsha 410128, China
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Locato V, de Pinto MC, De Gara L. Different involvement of the mitochondrial, plastidial and cytosolic ascorbate-glutathione redox enzymes in heat shock responses. PHYSIOLOGIA PLANTARUM 2009; 135:296-306. [PMID: 19236663 DOI: 10.1111/j.1399-3054.2008.01195.x] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Plant survival under heat stress requires the activation of proper defence mechanisms to avoid the impairment of metabolic functions. Heat stress leads to the overproduction of reactive oxygen species (ROS) in the cell. In plants, the ascorbate (ASC)-GSH cycle plays a pivotal role in controlling ROS levels and cellular redox homeostasis. Ascorbate peroxidase (APX) is the enzyme of this cycle mainly involved in ROS detoxification. In this study, the ASC-GSH cycle enzymes were analysed in the cytosol, mitochondria and plastids of tobacco Bright Yellow-2 cultured cells. The cells were also subjected to two different heat shocks (HSs; 35 or 55 degrees C for 10 min) and the cell compartments were isolated in both conditions. The results reported here indicate that moderate HS (35 degrees C) does not affect cell viability, whereas cell exposure to 55 degrees C HS induces programmed cell death (PCD). In relation to ASC-GSH cycle, the three analysed compartments have specific enzymatic profiles that are diversely altered by the HS treatments. The cytosol contains the highest activity of all ASC-GSH cycle enzymes and the data reported here suggest that it acts as a redox buffer for the whole cells. In particular, the cytosolic APX seems to be the most versatile enzyme, being its activity enhanced after moderate HS and reduced during PCD induction, whereas the other APX isoenzymes are only affected in the cells undergoing PCD. The relevance of the changes in the different ASC-GSH cycle isoenzymes in allowing cell survival or promoting PCD is discussed.
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Affiliation(s)
- Vittoria Locato
- Centro Integrato di Ricerca, Università Campus Bio-Medico, Roma, Italy
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Königshofer H, Tromballa HW, Löppert HG. Early events in signalling high-temperature stress in tobacco BY2 cells involve alterations in membrane fluidity and enhanced hydrogen peroxide production. PLANT, CELL & ENVIRONMENT 2008; 31:1771-80. [PMID: 18761700 DOI: 10.1111/j.1365-3040.2008.01880.x] [Citation(s) in RCA: 79] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
Alterations in membrane fluidity are among the early events in plants that detect changes in ambient temperature. However, signal transduction downstream of the membrane-associated processes is still not well understood. We have focused here on the role of hydrogen peroxide (H(2)O(2)) in high-temperature signalling in relation to changes in membrane fluidity in cells of tobacco (Nicotiana tabacum L.) cv. Bright Yellow 2 (BY2). As final indicators of the heat-signalling cascade, we have monitored the synthesis of small heat-shock proteins (sHSPs). Elevation of temperature between 32 and 38 degrees C resulted in a fast, transient stimulation of H(2)O(2) production in the tobacco cells. A similar H(2)O(2) burst could be induced at lower temperatures (28-32 degrees C) by membrane fluidization using benzyl alcohol (BA). Diphenylene iodonium (DPI), a NADPH oxidase inhibitor, prevented both the heat- and BA-triggered H(2)O(2) rise. The synthesis of sHSPs (14.5 and 16 kDa) was shifted to lower temperatures by BA application and was suppressed by DPI treatment in the same way. The results indicate that H(2)O(2) is an early component of the heat-signalling pathway, which responds rapidly to changes in membrane fluidity and is required for the activation of sHSP synthesis.
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Affiliation(s)
- Helga Königshofer
- Department of Integrative Biology and Biodiversity Research, Institute of Botany, University of Natural Resources and Applied Life Sciences Vienna, Gregor Mendel Str. 33, 1180 Vienna, Austria.
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Locato V, Gadaleta C, De Gara L, De Pinto MC. Production of reactive species and modulation of antioxidant network in response to heat shock: a critical balance for cell fate. PLANT, CELL & ENVIRONMENT 2008; 31:1606-19. [PMID: 18684242 DOI: 10.1111/j.1365-3040.2008.01867.x] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Exposure to adverse temperature conditions is a common stress factor for plants. In order to cope with heat stress, plants activate several defence mechanisms responsible for the control of reactive oxygen species (ROS) and redox homeostasis. Specific heat shocks (HSs) are also able to activate programmed cell death (PCD). In this paper, the alteration of several oxidative markers and ROS scavenging enzymes were studied after subjecting cells to two different HSs. Our results suggest that, under moderate HS, the redox homeostasis is mainly guaranteed by an increase in glutathione (GSH) content and in the ascorbate peroxidase (APX) and catalase (CAT) activities. These two enzymes undergo different regulatory mechanisms. On the other hand, the HS-induced PCD determines an increase in the activity of the enzymes recycling the ascorbate- and GSH-oxidized forms and a reduction of APX; whereas, CAT decreases only after a transient rise of its activity, which occurs in spite of the decrease of its gene expression. These results suggest that the enzyme-dependent ROS scavenging is enhanced under moderate HS and suppressed under HS-induced PCD. Moreover, the APX suppression occurring very early during PCD, could represent a hallmark of cells that have activated a suicide programme.
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Affiliation(s)
- Vittoria Locato
- Dipartimento di Biologia e Patologia Vegetale, Università degli Studi di Bari, Bari, Italy
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Lee DG, Ahsan N, Lee SH, Kang KY, Bahk JD, Lee IJ, Lee BH. A proteomic approach in analyzing heat-responsive proteins in rice leaves. Proteomics 2007; 7:3369-83. [PMID: 17722143 DOI: 10.1002/pmic.200700266] [Citation(s) in RCA: 237] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
The present study investigated rice leaf proteome in response to heat stress. Rice seedlings were subjected to a temperature of 42 degrees C and samples were collected 12 and 24 h after treatment. Increased relative ion leakage and lipid peroxidation suggested that oxidative stress frequently was generated in rice leaves exposed to high temperature. 2-DE, coupled with MS, was used to investigate and identify heat-responsive proteins in rice leaves. In order to identify the low-abundant proteins in leaves, samples were prefractionated by 15% PEG. The PEG supernatant and the pellet fraction samples were separated by 2-DE, and visualized by silver or CBB staining. Approximately 1000 protein spots were reproducibly detected on each gel, wherein 73 protein spots were differentially expressed at least at one time point. Of these differentially expressed proteins, a total of 34 and 39 protein spots were found in the PEG supernatant and pellet fractions, respectively. Using MALDI-TOF MS, a total of 48 proteins were identified. These proteins were categorized into classes related to heat shock proteins, energy and metabolism, redox homeostasis, and regulatory proteins. The results of the present study show that a group of low molecular small heat shock proteins (sHSPs) were newly induced by heat stress. Among these sHSPs, a low molecular weight mitochondrial (Mt) sHSP was validated further by Western blot analysis. Furthermore, four differentially accumulated proteins that correspond to antioxidant enzymes were analyzed at the mRNA level, which confirmed the differential gene expression levels, and revealed that transcription levels were not completely concomitant with translation. The identification of some novel proteins in the heat stress response provides new insights that can lead to a better understanding of the molecular basis of heat-sensitivity in plants.
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Affiliation(s)
- Dong-Gi Lee
- Division of Applied Life Sciences (BK21 and EB-NCRC), Plant Molecular Biology and Biotechnology Research Center, Gyeongsang National University, Jinju, Korea
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