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Dai W, Wang X, Zhuang M, Sun J, Shen Y, Xia Z, Wu T, Jiang R, Li A, Bi F, Zhang J, He P. Responses of photosynthesis-related genes in Sargassum horneri to high temperature stress. MARINE POLLUTION BULLETIN 2024; 199:115944. [PMID: 38142666 DOI: 10.1016/j.marpolbul.2023.115944] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2023] [Revised: 12/12/2023] [Accepted: 12/14/2023] [Indexed: 12/26/2023]
Abstract
Golden tide outbreak threatened the marine ecological environment. Sargassum horneri is a single dominant species of the Yellow Sea golden tide, which growth and development are affected by changes in sea water temperature. This study investigated the photosynthetic physiology of copper algae and found that the growth rate, chlorophyll a content, carotenoid content, Fv/Fm, and maximum electron transfer efficiency were significantly reduced, indicating that Sargassum horneri was under stress under high temperature. In this study, high-throughput sequencing was used to analyze the response mechanisms of photosynthesis-related genes in S. horneri under high temperature stress. The results showed that most of the photosynthesis-related genes in S. horneri were downregulated and photosynthesis was inhibited under high temperature stress. However, the expression levels of ferredoxin, ferredoxin-NADP reductase, light-harvesting protein complexes, and oxygen-evolving complex genes were significantly upregulated (P ≤ 0.05) after five days of high temperature treatment. This study found that photosynthesis related genes play a crucial role in regulating the photosynthetic response of S. horneri to high temperature stress.
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Affiliation(s)
- Wei Dai
- College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai 201306, China
| | - Xiaoran Wang
- College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai 201306, China
| | - Minmin Zhuang
- State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 200062, China
| | - Jingyi Sun
- College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai 201306, China
| | - Yifei Shen
- College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai 201306, China
| | - Zhangyi Xia
- College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai 201306, China
| | - Tingjian Wu
- College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai 201306, China
| | - Ruitong Jiang
- College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai 201306, China
| | - Aiqin Li
- College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai 201306, China
| | - Fangling Bi
- College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai 201306, China
| | - Jianheng Zhang
- College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai 201306, China.
| | - Peimin He
- College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai 201306, China.
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2
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Shen C, Feng G, Zhao F, Huang X, Wang M, Wang H. Integration of Transcriptomics and Proteomics Analysis Reveals the Molecular Mechanism of Eriocheir sinensis Gills Exposed to Heat Stress. Antioxidants (Basel) 2023; 12:2020. [PMID: 38136140 PMCID: PMC10740794 DOI: 10.3390/antiox12122020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2023] [Revised: 11/10/2023] [Accepted: 11/17/2023] [Indexed: 12/24/2023] Open
Abstract
Heat stress is an increasingly concerning topic under global warming. Heat stress can induce organisms to produce excess reactive oxygen species, which will lead to cell damage and destroy the antioxidant defense of aquatic animals. Chinese mitten crab, Eriocheir sinensis, is sensitive to the change in water temperature, and parent crabs are more vulnerable during the breeding stage. In the present study, the multi-omics responses of parent E. sinensis gills to heat stress (24 h) were determined via transcriptome and proteome. The integrative analysis revealed that heat shock protein 70 (HSP70) and glutathione s-transferase (GST) were significantly up-regulated at gene and protein levels after heat stress, indicating that HSP70 and the antioxidant system participated in the regulatory mechanism of heat stress to resist oxidative damage. Moreover, the "Relaxin signaling pathway" was also activated at gene and protein levels under 30 °C stress, which implied that relaxin may be essential and responsible for reducing the oxidative damage of gills caused by extreme heat stress. These findings provided an understanding of the regulation mechanism in E. sinensis under heat stress at gene and protein levels. The mining of key functional genes, proteins, and pathways can also provide a basis for the cultivation of new varieties resistant to oxidative stress.
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Affiliation(s)
- Chenchen Shen
- East China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Shanghai 200090, China; (C.S.); (F.Z.); (X.H.); (M.W.)
- College of Fisheries and Life sciences, Shanghai Ocean University, Shanghai 200090, China
| | - Guangpeng Feng
- East China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Shanghai 200090, China; (C.S.); (F.Z.); (X.H.); (M.W.)
- College of Fisheries and Life sciences, Shanghai Ocean University, Shanghai 200090, China
- Jiangxi Institute for Fisheries Sciences, Poyang Lake Fisheries Research Centre of Jiangxi, Nanchang 330039, China;
| | - Feng Zhao
- East China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Shanghai 200090, China; (C.S.); (F.Z.); (X.H.); (M.W.)
| | - Xiaorong Huang
- East China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Shanghai 200090, China; (C.S.); (F.Z.); (X.H.); (M.W.)
| | - Min Wang
- East China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Shanghai 200090, China; (C.S.); (F.Z.); (X.H.); (M.W.)
| | - Haihua Wang
- Jiangxi Institute for Fisheries Sciences, Poyang Lake Fisheries Research Centre of Jiangxi, Nanchang 330039, China;
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Roach T, Neuner G, Kranner I, Buchner O. Heat Acclimation under Drought Stress Induces Antioxidant Enzyme Activity in the Alpine Plant Primula minima. Antioxidants (Basel) 2023; 12:antiox12051093. [PMID: 37237959 DOI: 10.3390/antiox12051093] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Revised: 05/04/2023] [Accepted: 05/09/2023] [Indexed: 05/28/2023] Open
Abstract
Heat and drought stresses are increasingly relevant topics in the context of climate change, particularly in the Alps, which are warming faster than the global average. Previously, we have shown that alpine plants, including Primula minima, can be gradually heat hardened under field conditions in situ to achieve maximum tolerance within a week. Here, we investigated the antioxidant mechanisms of P. minima leaves that had been heat hardened (H) without or with (H+D) additional drought stress. Lower free-radical scavenging and ascorbate concentrations were found in H and H+D leaves, while concentrations of glutathione disulphide (GSSG) were higher under both treatments without any change in glutathione (GSH) and little change in glutathione reductase activity. In contrast, ascorbate peroxidase activity in H leaves was increased, and H+D leaves had >two-fold higher catalase, ascorbate peroxidase and glucose-6-phosphate dehydrogenase activities compared with the control. In addition, the glutathione reductase activity was higher in H+D compared with H leaves. Our results highlight that the stress load from heat acclimation to maximum tolerance is associated with a weakened low-molecular-weight antioxidant defence, which may be compensated for by an increased activity of antioxidant enzymes, particularly under drought conditions.
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Affiliation(s)
- Thomas Roach
- Department of Botany, University of Innsbruck, Sternwartestrasse 15, 6020 Innsbruck, Austria
| | - Gilbert Neuner
- Department of Botany, University of Innsbruck, Sternwartestrasse 15, 6020 Innsbruck, Austria
| | - Ilse Kranner
- Department of Botany, University of Innsbruck, Sternwartestrasse 15, 6020 Innsbruck, Austria
| | - Othmar Buchner
- Department of Botany, University of Innsbruck, Sternwartestrasse 15, 6020 Innsbruck, Austria
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4
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Redox Signaling in Plant Heat Stress Response. Antioxidants (Basel) 2023; 12:antiox12030605. [PMID: 36978852 PMCID: PMC10045013 DOI: 10.3390/antiox12030605] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2023] [Revised: 02/24/2023] [Accepted: 02/27/2023] [Indexed: 03/06/2023] Open
Abstract
The increase in environmental temperature due to global warming is a critical threat to plant growth and productivity. Heat stress can cause impairment in several biochemical and physiological processes. Plants sense and respond to this adverse environmental condition by activating a plethora of defense systems. Among them, the heat stress response (HSR) involves an intricate network of heat shock factors (HSFs) and heat shock proteins (HSPs). However, a growing amount of evidence suggests that reactive oxygen species (ROS), besides potentially being responsible for cellular oxidative damage, can act as signal molecules in HSR, leading to adaptative responses. The role of ROS as toxic or signal molecules depends on the fine balance between their production and scavenging. Enzymatic and non-enzymatic antioxidants represent the first line of defense against oxidative damage and their activity is critical to maintaining an optimal redox environment. However, the HS-dependent ROS burst temporarily oxidizes the cellular environment, triggering redox-dependent signaling cascades. This review provides an overview of the redox-activated mechanisms that participate in the HSR.
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Lasorella C, Fortunato S, Dipierro N, Jeran N, Tadini L, Vita F, Pesaresi P, de Pinto MC. Chloroplast-localized GUN1 contributes to the acquisition of basal thermotolerance in Arabidopsis thaliana. FRONTIERS IN PLANT SCIENCE 2022; 13:1058831. [PMID: 36618674 PMCID: PMC9813751 DOI: 10.3389/fpls.2022.1058831] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Accepted: 12/05/2022] [Indexed: 06/17/2023]
Abstract
Heat stress (HS) severely affects different cellular compartments operating in metabolic processes and represents a critical threat to plant growth and yield. Chloroplasts are crucial for heat stress response (HSR), signaling to the nucleus the environmental challenge and adjusting metabolic and biosynthetic functions accordingly. GENOMES UNCOUPLED 1 (GUN1), a chloroplast-localized protein, has been recognized as one of the main players of chloroplast retrograde signaling. Here, we investigate HSR in Arabidopsis wild-type and gun1 plantlets subjected to 2 hours of HS at 45°C. In wild-type plants, Reactive Oxygen Species (ROS) accumulate promptly after HS, contributing to transiently oxidize the cellular environment and acting as signaling molecules. After 3 hours of physiological recovery at growth temperature (22°C), the induction of enzymatic and non-enzymatic antioxidants prevents oxidative damage. On the other hand, gun1 mutants fail to induce the oxidative burst immediately after HS and accumulate ROS and oxidative damage after 3 hours of recovery at 22°C, thus resulting in enhanced sensitivity to HS. These data suggest that GUN1 is required to oxidize the cellular environment, participating in the acquisition of basal thermotolerance through the redox-dependent plastid-to-nucleus communication.
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Affiliation(s)
- Cecilia Lasorella
- Department of Bioscience, Biotechnology and Environment University of Bari Aldo Moro, Bari, Italy
| | - Stefania Fortunato
- Department of Bioscience, Biotechnology and Environment University of Bari Aldo Moro, Bari, Italy
| | - Nunzio Dipierro
- Department of Bioscience, Biotechnology and Environment University of Bari Aldo Moro, Bari, Italy
| | - Nicolaj Jeran
- Department of Biosciences, University of Milano, Milano, Italy
| | - Luca Tadini
- Department of Biosciences, University of Milano, Milano, Italy
| | - Federico Vita
- Department of Bioscience, Biotechnology and Environment University of Bari Aldo Moro, Bari, Italy
| | - Paolo Pesaresi
- Department of Biosciences, University of Milano, Milano, Italy
| | - Maria Concetta de Pinto
- Department of Bioscience, Biotechnology and Environment University of Bari Aldo Moro, Bari, Italy
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Molecular and epigenetic basis of heat stress responses and acclimatization in plants. THE NUCLEUS 2022. [DOI: 10.1007/s13237-022-00400-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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7
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cAMP Is a Promising Regulatory Molecule for Plant Adaptation to Heat Stress. Life (Basel) 2022; 12:life12060885. [PMID: 35743916 PMCID: PMC9225146 DOI: 10.3390/life12060885] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2022] [Revised: 06/06/2022] [Accepted: 06/07/2022] [Indexed: 11/16/2022] Open
Abstract
With gradual warming or increased frequency and magnitude of high temperature, heat stress adversely affects plant growth and eventually reduces plant productivity and quality. Plants have evolved complex mechanisms to sense and respond to heat stress which are crucial to avoiding cell damage and maintaining cellular homeostasis. Recently, 33″,55″-cyclic adenosine monophosphate (cAMP) has been proved to be an important signaling molecule participating in plant adaptation to heat stress by affecting multi-level regulatory networks. Significant progress has been made on many fronts of cAMP research, particularly in understanding the downstream signaling events that culminate in the activation of stress-responsive genes, mRNA translation initiation, vesicle trafficking, the ubiquitin-proteasome system, autophagy, HSPs-assisted protein processing, and cellular ion homeostasis to prevent heat-related damage and to preserve cellular and metabolic functions. In this present review, we summarize recent works on the genetic and molecular mechanisms of cAMP in plant response to heat stress which could be useful in finding thermotolerant key genes to develop heat stress-resistant varieties and that have the potential for utilizing cAMP as a chemical regulator to improve plant thermotolerance. New directions for future studies on cAMP are discussed.
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The Butterfly Effect: Mild Soil Pollution with Heavy Metals Elicits Major Biological Consequences in Cobalt-Sensitized Broad Bean Model Plants. Antioxidants (Basel) 2022; 11:antiox11040793. [PMID: 35453478 PMCID: PMC9028058 DOI: 10.3390/antiox11040793] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Revised: 04/15/2022] [Accepted: 04/15/2022] [Indexed: 11/17/2022] Open
Abstract
Among the heavy metals (HMs), only cobalt induces a polymorphic response in Vicia faba plants, manifesting as chlorophyll morphoses and a ‘break-through’ effect resulting in the elevated accumulation of other HMs, which makes Co-pretreated broad bean plants an attractive model for investigating soil pollution by HMs. In this study, Co-sensitized V. faba plants were used to evaluate the long-term effect of residual industrial pollution by examining biochemical (H2O2, ascorbic acid, malondialdehyde, free proline, flavonoid, polyphenols, chlorophylls, carotenoids, superoxide dismutase) and molecular (conserved DNA-derived polymorphism and transcript-derived polymorphic fragments) markers after long-term exposure. HM-polluted soil induced a significantly higher frequency of chlorophyll morphoses and lower levels of nonenzymatic antioxidants in Co-pretreated V. faba plants. Both molecular markers effectively differentiated plants from polluted and control soils into distinct clusters, showing that HMs in mildly polluted soil are capable of inducing changes in DNA coding regions. These findings illustrate that strong background abiotic stressors (pretreatment with Co) can aid investigations of mild stressors (slight levels of soil pollution) by complementing each other in antioxidant content reduction and induction of DNA changes.
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Paradiso A, Domingo G, Blanco E, Buscaglia A, Fortunato S, Marsoni M, Scarcia P, Caretto S, Vannini C, de Pinto MC. Cyclic AMP mediates heat stress response by the control of redox homeostasis and ubiquitin-proteasome system. PLANT, CELL & ENVIRONMENT 2020; 43:2727-2742. [PMID: 32876347 DOI: 10.1111/pce.13878] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2020] [Accepted: 08/22/2020] [Indexed: 06/11/2023]
Abstract
Heat stress (HS), causing impairment in several physiological processes, is one of the most damaging environmental cues for plants. To counteract the harmful effects of high temperatures, plants activate complex signalling networks, indicated as HS response (HSR). Expression of heat shock proteins (HSPs) and adjustment of redox homeostasis are crucial events of HSR, required for thermotolerance. By pharmacological approaches, the involvement of cAMP in triggering plant HSR has been recently proposed. In this study, to investigate the role of cAMP in HSR signalling, tobacco BY-2 cells overexpressing the 'cAMP-sponge', a genetic tool that reduces intracellular cAMP levels, have been used. in vivo cAMP dampening increased HS susceptibility in a HSPs-independent way. The failure in cAMP elevation during HS caused a high accumulation of reactive oxygen species, due to increased levels of respiratory burst oxidase homolog D, decreased activities of catalase and ascorbate peroxidase, as well as down-accumulation of proteins involved in the control of redox homeostasis. In addition, cAMP deficiency impaired proteasome activity and prevented the accumulation of many proteins of ubiquitin-proteasome system (UPS). By a large-scale proteomic approach together with in silico analyses, these UPS proteins were identified in a specific cAMP-dependent network of HSR.
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Affiliation(s)
| | - Guido Domingo
- Department of Biotechnology and Life Science, University of Insubria, Varese, Italy
| | - Emanuela Blanco
- Institute of Biosciences and Bioresources, National Research Council, Bari, Italy
| | - Alessio Buscaglia
- Department of Biology, University of Bari "Aldo Moro", Bari, Italy
- Department of Biotechnology and Life Science, University of Insubria, Varese, Italy
| | | | - Milena Marsoni
- Department of Biotechnology and Life Science, University of Insubria, Varese, Italy
| | - Pasquale Scarcia
- Department of Biosciences, Biotechnologies and Biopharmaceutics, University of Bari "Aldo Moro", Bari, Italy
| | - Sofia Caretto
- Institute of Sciences of Food Production, CNR, Research Division Lecce, Lecce, Italy
| | - Candida Vannini
- Department of Biotechnology and Life Science, University of Insubria, Varese, Italy
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Wang ZQ, Zhao QM, Zhong X, Xiao L, Ma LX, Wu CF, Zhang Z, Zhang LQ, Tian Y, Fan W. Comparative analysis of maca (Lepidium meyenii) proteome profiles reveals insights into response mechanisms of herbal plants to high-temperature stress. BMC PLANT BIOLOGY 2020; 20:431. [PMID: 32938390 PMCID: PMC7493174 DOI: 10.1186/s12870-020-02645-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Accepted: 09/10/2020] [Indexed: 05/14/2023]
Abstract
BACKGROUND High-temperature stress (HTS) is one of the main environmental stresses that limit plant growth and crop production in agricultural systems. Maca (Lepidium meyenii) is an important high-altitude herbaceous plant adapted to a wide range of environmental stimuli such as cold, strong wind and UV-B exposure. However, it is an extremely HTS-sensitive plant species. Thus far, there is limited information about gene/protein regulation and signaling pathways related to the heat stress responses in maca. In this study, proteome profiles of maca seedlings exposed to HTS for 12 h were investigated using a tandem mass tag (TMT)-based proteomic approach. RESULTS In total, 6966 proteins were identified, of which 300 showed significant alterations in expression following HTS. Bioinformatics analyses indicated that protein processing in endoplasmic reticulum was the most significantly up-regulated metabolic pathway following HTS. Quantitative RT-PCR (qRT-PCR) analysis showed that the expression levels of 19 genes encoding proteins mapped to this pathway were significantly up-regulated under HTS. These results show that protein processing in the endoplasmic reticulum may play a crucial role in the responses of maca to HTS. CONCLUSIONS Our proteomic data can be a good resource for functional proteomics of maca and our results may provide useful insights into the molecular response mechanisms underlying herbal plants to HTS.
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Affiliation(s)
- Zhan Qi Wang
- Key Laboratory of Vector Biology and Pathogen Control of Zhejiang Province, College of Life Sciences, Huzhou University, Huzhou, 313000 China
| | - Qi Ming Zhao
- State Key Laboratory of Conservation and Utilization of Bio-resources in Yunnan, The Key Laboratory of Medicinal Plant Biology of Yunnan Province, National & Local Joint Engineering Research Center on Germplasm Innovation & Utilization of Chinese Medicinal Materials in Southwest China, Yunnan Agricultural University, Kunming, 650201 China
| | - Xueting Zhong
- Key Laboratory of Vector Biology and Pathogen Control of Zhejiang Province, College of Life Sciences, Huzhou University, Huzhou, 313000 China
| | - Li Xiao
- Key Laboratory of Vector Biology and Pathogen Control of Zhejiang Province, College of Life Sciences, Huzhou University, Huzhou, 313000 China
| | - Li Xuan Ma
- College of Food Science and Technology, Yunnan Agricultural University, Kunming, 650201 China
| | - Chou Fei Wu
- Key Laboratory of Vector Biology and Pathogen Control of Zhejiang Province, College of Life Sciences, Huzhou University, Huzhou, 313000 China
| | - Zhongshan Zhang
- Key Laboratory of Vector Biology and Pathogen Control of Zhejiang Province, College of Life Sciences, Huzhou University, Huzhou, 313000 China
| | - Li Qin Zhang
- Key Laboratory of Vector Biology and Pathogen Control of Zhejiang Province, College of Life Sciences, Huzhou University, Huzhou, 313000 China
- Huzhou central hospital, Huzhou University, Huzhou, 313000 China
| | - Yang Tian
- College of Food Science and Technology, Yunnan Agricultural University, Kunming, 650201 China
| | - Wei Fan
- State Key Laboratory of Conservation and Utilization of Bio-resources in Yunnan, The Key Laboratory of Medicinal Plant Biology of Yunnan Province, National & Local Joint Engineering Research Center on Germplasm Innovation & Utilization of Chinese Medicinal Materials in Southwest China, Yunnan Agricultural University, Kunming, 650201 China
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Khan MA, Asaf S, Khan AL, Jan R, Kang SM, Kim KM, Lee IJ. Thermotolerance effect of plant growth-promoting Bacillus cereus SA1 on soybean during heat stress. BMC Microbiol 2020; 20:175. [PMID: 32571217 PMCID: PMC7310250 DOI: 10.1186/s12866-020-01822-7] [Citation(s) in RCA: 69] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2019] [Accepted: 05/14/2020] [Indexed: 01/13/2023] Open
Abstract
BACKGROUND Incidences of heat stress due to the changing global climate can negatively affect the growth and yield of temperature-sensitive crops such as soybean variety, Pungsannamul. Increased temperatures decrease crop productivity by affecting biochemical, physiological, molecular, and morphological factors either individually or in combination with other abiotic stresses. The application of plant growth-promoting endophytic bacteria (PGPEB) offers an ecofriendly approach for improving agriculture crop production and counteracting the negative effects of heat stress. RESULTS We isolated, screened and identified thermotolerant B. cereus SA1 as a bacterium that could produce biologically active metabolites, such as gibberellin, indole-3-acetic acid, and organic acids. SA1 inoculation improved the biomass, chlorophyll content, and chlorophyll fluorescence of soybean plants under normal and heat stress conditions for 5 and 10 days. Heat stress increased abscisic acid (ABA) and reduced salicylic acid (SA); however, SA1 inoculation markedly reduced ABA and increased SA. Antioxidant analysis results showed that SA1 increased the ascorbic acid peroxidase, superoxide dismutase, and glutathione contents in soybean plants. In addition, heat stress markedly decreased amino acid contents; however, they were increased with SA1 inoculation. Heat stress for 5 days increased heat shock protein (HSP) expression, and a decrease in GmHSP expression was observed after 10 days; however, SA1 inoculation augmented the heat stress response and increased HSP expression. The stress-responsive GmLAX3 and GmAKT2 were overexpressed in SA1-inoculated plants and may be associated with decreased reactive oxygen species generation, altered auxin and ABA stimuli, and enhanced potassium gradients, which are critical in plants under heat stress. CONCLUSION The current findings suggest that B. cereus SA1 could be used as a thermotolerant bacterium for the mitigation of heat stress damage in soybean plants and could be commercialized as a biofertilizer only in case found non-pathogenic.
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Affiliation(s)
- Muhammad Aaqil Khan
- School of Applied Biosciences, Kyungpook National University, Daegu, 41566, Republic of Korea
| | - Sajjad Asaf
- Natural and Medical Sciences Research Center, University of Nizwa, 616, Nizwa, Oman
| | - Abdul Latif Khan
- Natural and Medical Sciences Research Center, University of Nizwa, 616, Nizwa, Oman
| | - Rahmatullah Jan
- School of Applied Biosciences, Kyungpook National University, Daegu, 41566, Republic of Korea
| | - Sang-Mo Kang
- School of Applied Biosciences, Kyungpook National University, Daegu, 41566, Republic of Korea
| | - Kyung-Min Kim
- School of Applied Biosciences, Kyungpook National University, Daegu, 41566, Republic of Korea
| | - In-Jung Lee
- School of Applied Biosciences, Kyungpook National University, Daegu, 41566, Republic of Korea.
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12
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Vitamin C in Plants: From Functions to Biofortification. Antioxidants (Basel) 2019; 8:antiox8110519. [PMID: 31671820 PMCID: PMC6912510 DOI: 10.3390/antiox8110519] [Citation(s) in RCA: 84] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2019] [Revised: 10/25/2019] [Accepted: 10/26/2019] [Indexed: 12/18/2022] Open
Abstract
Vitamin C (l-ascorbic acid) is an excellent free radical scavenger, not only for its capability to donate reducing equivalents but also for the relative stability of the derived monodehydroascorbate radical. However, vitamin C is not only an antioxidant, since it is also a cofactor for numerous enzymes involved in plant and human metabolism. In humans, vitamin C takes part in various physiological processes, such as iron absorption, collagen synthesis, immune stimulation, and epigenetic regulation. Due to the functional loss of the gene coding for l-gulonolactone oxidase, humans cannot synthesize vitamin C; thus, they principally utilize plant-based foods for their needs. For this reason, increasing the vitamin C content of crops could have helpful effects on human health. To achieve this objective, exhaustive knowledge of the metabolism and functions of vitamin C in plants is needed. In this review, the multiple roles of vitamin C in plant physiology as well as the regulation of its content, through biosynthetic or recycling pathways, are analyzed. Finally, attention is paid to the strategies that have been used to increase the content of vitamin C in crops, emphasizing not only the improvement of nutritional value of the crops but also the acquisition of plant stress resistance.
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13
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Hasanuzzaman M, Bhuyan MHMB, Anee TI, Parvin K, Nahar K, Mahmud JA, Fujita M. Regulation of Ascorbate-Glutathione Pathway in Mitigating Oxidative Damage in Plants under Abiotic Stress. Antioxidants (Basel) 2019; 8:E384. [PMID: 31505852 PMCID: PMC6770940 DOI: 10.3390/antiox8090384] [Citation(s) in RCA: 384] [Impact Index Per Article: 76.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2019] [Revised: 08/25/2019] [Accepted: 09/05/2019] [Indexed: 01/08/2023] Open
Abstract
Reactive oxygen species (ROS) generation is a usual phenomenon in a plant both under a normal and stressed condition. However, under unfavorable or adverse conditions, ROS production exceeds the capacity of the antioxidant defense system. Both non-enzymatic and enzymatic components of the antioxidant defense system either detoxify or scavenge ROS and mitigate their deleterious effects. The Ascorbate-Glutathione (AsA-GSH) pathway, also known as Asada-Halliwell pathway comprises of AsA, GSH, and four enzymes viz. ascorbate peroxidase, monodehydroascorbate reductase, dehydroascorbate reductase, and glutathione reductase, play a vital role in detoxifying ROS. Apart from ROS detoxification, they also interact with other defense systems in plants and protect the plants from various abiotic stress-induced damages. Several plant studies revealed that the upregulation or overexpression of AsA-GSH pathway enzymes and the enhancement of the AsA and GSH levels conferred plants better tolerance to abiotic stresses by reducing the ROS. In this review, we summarize the recent progress of the research on AsA-GSH pathway in terms of oxidative stress tolerance in plants. We also focus on the defense mechanisms as well as molecular interactions.
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Affiliation(s)
- Mirza Hasanuzzaman
- Department of Agronomy, Faculty of Agriculture, Sher-e-Bangla Agricultural University, Dhaka 1207, Bangladesh.
| | - M H M Borhannuddin Bhuyan
- Laboratory of Plant Stress Responses, Department of Applied Biological Science, Faculty of Agriculture, Kagawa University, Miki-cho, Kita-gun, Kagawa 761-0795, Japan.
- Citrus Research Station, Bangladesh Agricultural Research Institute, Jaintapur, Sylhet 3156, Bangladesh.
| | - Taufika Islam Anee
- Department of Agronomy, Faculty of Agriculture, Sher-e-Bangla Agricultural University, Dhaka 1207, Bangladesh.
| | - Khursheda Parvin
- Laboratory of Plant Stress Responses, Department of Applied Biological Science, Faculty of Agriculture, Kagawa University, Miki-cho, Kita-gun, Kagawa 761-0795, Japan.
- Department of Horticulture, Faculty of Agriculture, Sher-e-Bangla Agricultural University, Dhaka 1207, Bangladesh.
| | - Kamrun Nahar
- Department of Agricultural Botany, Faculty of Agriculture, Sher-e-Bangla Agricultural University, Dhaka 1207, Bangladesh.
| | - Jubayer Al Mahmud
- Department of Agroforestry and Environmental Science, Faculty of Agriculture, Sher-e-Bangla Agricultural University, Dhaka 1207, Bangladesh.
| | - 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.
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14
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He Y, Li Z, Tan F, Liu H, Zhu M, Yang H, Bi G, Wan H, Wang J, Xu R, Wen W, Zeng Y, Xu J, Guo W, Xue S, Cheng Y, Deng X. Fatty acid metabolic flux and lipid peroxidation homeostasis maintain the biomembrane stability to improve citrus fruit storage performance. Food Chem 2019; 292:314-324. [DOI: 10.1016/j.foodchem.2019.04.009] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2018] [Revised: 03/31/2019] [Accepted: 04/01/2019] [Indexed: 11/28/2022]
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15
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Filiz E, Ozyigit II, Saracoglu IA, Uras ME, Sen U, Yalcin B. Abiotic stress-induced regulation of antioxidant genes in different Arabidopsis ecotypes: microarray data evaluation. BIOTECHNOL BIOTEC EQ 2019. [DOI: 10.1080/13102818.2018.1556120] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Affiliation(s)
- Ertugrul Filiz
- Department of Crop and Animal Production, Cilimli Vocational School, Duzce University, Cilimli, Duzce, Turkey
| | - Ibrahim Ilker Ozyigit
- Department of Biology, Faculty of Science and Arts, Marmara University, Goztepe, Istanbul, Turkey
- Department of Biology, Faculty of Science, Kyrgyz-Turkish Manas University, Bishkek, Kyrgyzstan
| | - Ibrahim Adnan Saracoglu
- Department of Chemistry, Faculty of Science and Arts, Marmara University, Goztepe, Istanbul, Turkey
| | - Mehmet Emin Uras
- Department of Biology, Faculty of Science and Arts, Marmara University, Goztepe, Istanbul, Turkey
| | - Ugur Sen
- Department of Biology, Faculty of Science and Arts, Marmara University, Goztepe, Istanbul, Turkey
| | - Bahattin Yalcin
- Department of Chemistry, Faculty of Science and Arts, Marmara University, Goztepe, Istanbul, Turkey
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16
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He Q, Yang H, Hu C. Effects of temperature and its combination with high light intensity on lipid production of Monoraphidium dybowskii Y2 from semi-arid desert areas. BIORESOURCE TECHNOLOGY 2018; 265:407-414. [PMID: 29933188 DOI: 10.1016/j.biortech.2018.06.044] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2018] [Revised: 06/12/2018] [Accepted: 06/13/2018] [Indexed: 06/08/2023]
Abstract
Temperature and light intensity are important environmental factors influencing microalgae for biodiesel production. The aim of present work was to study the effects of temperature (15 °C, 25 °C, and 35 °C) and its combination with high light intensity (HL, 400 μmol photon m-2 s-1) on lipid production of Monoraphidium dybowskii Y2 which was isolated from desert. The results demonstrated that algal growth was only inhibited at 15 °C. Promoted lipid content and decreased Fv/Fm were observed in 15 °C and 35 °C. Cellular carbohydrate, protein conversion and membrane lipid (MGDG, DGDG and SQDG) remodeling contributes for lipid accumulation. Stress combined temperatures with HL are benefit for lipid production, especially desired neutral lipid productivity all exceed 40 mg L-1 d-1. Fatty acids compositions of C16:0 and C18:1 were further promoted under 15 °C or 35 °C combined with HL. Thus, M. dybowskii Y2 will well-adapted to outdoors cultivation for biodiesel production.
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Affiliation(s)
- Qiaoning He
- Hubei Collaborative Innovation Center for Green Transformation of Bio-resources, Environmental Microbial Technology Center of Hubei Province, Hubei Key Laboratory of Industrial Biotechnology, College of Life Sciences, Hubei University, Wuhan 430062, China
| | - Haijian Yang
- Key Laboratory of Algal Biology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China
| | - Chunxiang Hu
- Key Laboratory of Algal Biology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China.
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17
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Li Z, Peng Y, Huang B. Alteration of Transcripts of Stress-Protective Genes and Transcriptional Factors by γ-Aminobutyric Acid (GABA) Associated with Improved Heat and Drought Tolerance in Creeping Bentgrass ( Agrostis stolonifera). Int J Mol Sci 2018; 19:ijms19061623. [PMID: 29857479 PMCID: PMC6032419 DOI: 10.3390/ijms19061623] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2018] [Revised: 05/18/2018] [Accepted: 05/25/2018] [Indexed: 01/09/2023] Open
Abstract
Gamma-aminobutyric acid (GABA) may play a positive role in regulating plant tolerance to drought or heat stress. The objectives of this study were to investigate the physiological effects of GABA on tolerance of creeping bentgrass (Agrostis stolonifera) to heat and drought stress and to determine whether enhanced heat and drought tolerance due to GABA treatment was associated with the up-regulation of selected genes and transcriptional factors involved in stress protection. Creeping bentgrass (cultivar “Penncross”) plants were treated with 0.5 mM GABA or water (untreated control) as a foliar spray and were subsequently exposed to heat stress (35/30 °C, day/night), drought stress by withholding irrigation, or non-stress conditions in controlled-environment growth chambers. Exogenous application of GABA significantly improved plant tolerance to heat and drought stress, as reflected by increased leaf water content, cell membrane stability, and chlorophyll content. The analysis of gene transcript level revealed that exogenous GABA up-regulated the expression of ABF3, POD, APX, HSP90, DHN3, and MT1 during heat stress and the expression of CDPK26, MAPK1, ABF3, WRKY75, MYB13, HSP70, MT1, 14-3-3, and genes (SOD, CAT, POD, APX, MDHAR, DHAR, and GR) encoding antioxidant enzymes during drought stress. The up-regulation of the aforementioned stress-protective genes and transcriptional factors could contribute to improved heat and drought tolerance in creeping bentgrass.
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Affiliation(s)
- Zhou Li
- Department of Grassland Science, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu 611130, Sichuan, China.
- Department of Plant Biology and Pathology, Rutgers University, 59 Dudley Road, New Brunswick, NJ 08901, USA.
| | - Yan Peng
- Department of Grassland Science, College of Animal Science and Technology, Sichuan Agricultural University, Chengdu 611130, Sichuan, China.
| | - Bingru Huang
- Department of Plant Biology and Pathology, Rutgers University, 59 Dudley Road, New Brunswick, NJ 08901, USA.
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18
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Wang W, Teng F, Lin Y, Ji D, Xu Y, Chen C, Xie C. Transcriptomic study to understand thermal adaptation in a high temperature-tolerant strain of Pyropia haitanensis. PLoS One 2018; 13:e0195842. [PMID: 29694388 PMCID: PMC5919043 DOI: 10.1371/journal.pone.0195842] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2017] [Accepted: 04/01/2018] [Indexed: 01/31/2023] Open
Abstract
Pyropia haitanensis, a high-yield commercial seaweed in China, is currently undergoing increasing levels of high-temperature stress due to gradual global warming. The mechanisms of plant responses to high temperature stress vary with not only plant type but also the degree and duration of high temperature. To understand the mechanism underlying thermal tolerance in P. haitanensis, gene expression and regulation in response to short- and long-term temperature stresses (SHS and LHS) was investigated by performing genome-wide high-throughput transcriptomic sequencing for a high temperature tolerant strain (HTT). A total of 14,164 differential expression genes were identified to be high temperature-responsive in at least one time point by high-temperature treatment, representing 41.10% of the total number of unigenes. The present data indicated a decrease in the photosynthetic and energy metabolic rates in HTT to reduce unnecessary energy consumption, which in turn facilitated in the rapid establishment of acclimatory homeostasis in its transcriptome during SHS. On the other hand, an increase in energy consumption and antioxidant substance activity was observed with LHS, which apparently facilitates in the development of resistance against severe oxidative stress. Meanwhile, ubiquitin-mediated proteolysis, brassinosteroids, and heat shock proteins also play a vital role in HTT. The effects of SHS and LHS on the mechanism of HTT to resist heat stress were relatively different. The findings may facilitate further studies on gene discovery and the molecular mechanisms underlying high-temperature tolerance in P. haitanensis, as well as allow improvement of breeding schemes for high temperature-tolerant macroalgae that can resist global warming.
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Affiliation(s)
- Wenlei Wang
- Fisheries College, Jimei University, Xiamen, China
- Key Laboratory of Healthy Mariculture for the East China Sea, Ministry of Agriculture, Xiamen, China
| | - Fei Teng
- Fisheries College, Jimei University, Xiamen, China
- Key Laboratory of Healthy Mariculture for the East China Sea, Ministry of Agriculture, Xiamen, China
| | - Yinghui Lin
- Fisheries College, Jimei University, Xiamen, China
- Key Laboratory of Healthy Mariculture for the East China Sea, Ministry of Agriculture, Xiamen, China
| | - Dehua Ji
- Fisheries College, Jimei University, Xiamen, China
- Key Laboratory of Healthy Mariculture for the East China Sea, Ministry of Agriculture, Xiamen, China
| | - Yan Xu
- Fisheries College, Jimei University, Xiamen, China
- Key Laboratory of Healthy Mariculture for the East China Sea, Ministry of Agriculture, Xiamen, China
| | - Changsheng Chen
- Fisheries College, Jimei University, Xiamen, China
- Key Laboratory of Healthy Mariculture for the East China Sea, Ministry of Agriculture, Xiamen, China
| | - Chaotian Xie
- Fisheries College, Jimei University, Xiamen, China
- Key Laboratory of Healthy Mariculture for the East China Sea, Ministry of Agriculture, Xiamen, China
- * E-mail:
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19
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Formentin E, Sudiro C, Ronci MB, Locato V, Barizza E, Stevanato P, Ijaz B, Zottini M, De Gara L, Lo Schiavo F. H 2O 2 Signature and Innate Antioxidative Profile Make the Difference Between Sensitivity and Tolerance to Salt in Rice Cells. FRONTIERS IN PLANT SCIENCE 2018; 9:1549. [PMID: 30405678 PMCID: PMC6206305 DOI: 10.3389/fpls.2018.01549] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2018] [Accepted: 10/03/2018] [Indexed: 05/07/2023]
Abstract
Salt tolerance is a complex trait that varies between and within species. H2O2 profiles as well as antioxidative systems have been investigated in the cultured cells of rice obtained from Italian rice varieties with different salt tolerance. Salt stress highlighted differences in extracellular and intracellular H2O2 profiles in the two cell cultures. The tolerant variety had innate reactive oxygen species (ROS) scavenging systems that enabled ROS, in particular H2O2, to act as a signal molecule rather than a damaging one. Different intracellular H2O2 profiles were also observed: in tolerant cells, an early and narrow peak was detected at 5 min; while in sensitive cells, a large peak was associated with cell death. Likewise, the transcription factor salt-responsive ethylene responsive factor 1 (TF SERF1), which is known for being regulated by H2O2, showed a different expression profile in the two cell lines. Notably, similar H2O2 profiles and cell fates were also obtained when exogenous H2O2 was produced by glucose/glucose oxidase (GOX) treatment. Under salt stress, the tolerant variety also exhibited rapid upregulation of K+ transporter genes in order to deal with K+/Na+ impairment. This upregulation was not detected in the presence of oxidative stress alone. The importance of the innate antioxidative profile was confirmed by the protective effect of experimentally increased glutathione in salt-treated sensitive cells. Overall, these results underline the importance of specific H2O2 signatures and innate antioxidative systems in modulating ionic and redox homeostasis for salt stress tolerance.
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Affiliation(s)
| | | | - Maria Beatrice Ronci
- Unit of Food Science and Human Nutrition, Campus Bio-Medico University of Rome, Rome, Italy
| | - Vittoria Locato
- Unit of Food Science and Human Nutrition, Campus Bio-Medico University of Rome, Rome, Italy
| | | | - Piergiorgio Stevanato
- Department of Agronomy, Food, Natural Resources, Animal and Environment, DAFNAE, University of Padova, Padova, Italy
| | - Bushra Ijaz
- Department of Biosciences, COMSATS University Islamabad, Islamabad, Pakistan
| | | | - Laura De Gara
- Unit of Food Science and Human Nutrition, Campus Bio-Medico University of Rome, Rome, Italy
- *Correspondence: Laura De Gara,
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20
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Viggiano L, de Pinto MC. Dynamic DNA Methylation Patterns in Stress Response. PLANT EPIGENETICS 2017. [DOI: 10.1007/978-3-319-55520-1_15] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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21
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Waqas M, Khan AL, Shahzad R, Ullah I, Khan AR, Lee IJ. Mutualistic fungal endophytes produce phytohormones and organic acids that promote japonica rice plant growth under prolonged heat stress. J Zhejiang Univ Sci B 2016; 16:1011-8. [PMID: 26642184 DOI: 10.1631/jzus.b1500081] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
This study identifies the potential role in heat-stress mitigation of phytohormones and other secondary metabolites produced by the endophytic fungus Paecilomyces formosus LWL1 in japonica rice cultivar Dongjin. The japonica rice was grown in controlled chamber conditions with and without P. formosus LWL1 under no stress (NS) and prolonged heat stress (HS) conditions. Endophytic association under NS and HS conditions significantly improved plant growth attributes, such as plant height, fresh weight, dry weight, and chlorophyll content. Furthermore, P. formosus LWL1 protected the rice plants from HS compared with controls, indicated by the lower endogenous level of stress-signaling compounds such as abscisic acid (25.71%) and jasmonic acid (34.57%) and the increase in total protein content (18.76%-33.22%). Such fungal endophytes may be helpful for sustainable crop production under high environmental temperatures.
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Affiliation(s)
- Muhammad Waqas
- School of Applied Biosciences, Kyungpook National University, Daegu 702-701, Republic of Korea.,Department of Agriculture Extension, Buner 19290, Pakistan
| | - Abdul Latif Khan
- School of Applied Biosciences, Kyungpook National University, Daegu 702-701, Republic of Korea.,UoN Chair of Oman's Medicinal Plants & Marine Natural Products, University of Nizwa, Nizwa 616, Oman
| | - Raheem Shahzad
- School of Applied Biosciences, Kyungpook National University, Daegu 702-701, Republic of Korea
| | - Ihsan Ullah
- School of Applied Biosciences, Kyungpook National University, Daegu 702-701, Republic of Korea.,Institute of Biotechnology and Genetic Engineering, the University of Agriculture, Peshawar 25130, Pakistan
| | - Abdur Rahim Khan
- School of Applied Biosciences, Kyungpook National University, Daegu 702-701, Republic of Korea
| | - In-Jung Lee
- School of Applied Biosciences, Kyungpook National University, Daegu 702-701, Republic of Korea
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22
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Metabolic pathways regulated by γ-aminobutyric acid (GABA) contributing to heat tolerance in creeping bentgrass (Agrostis stolonifera). Sci Rep 2016; 6:30338. [PMID: 27455877 PMCID: PMC4960583 DOI: 10.1038/srep30338] [Citation(s) in RCA: 92] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2016] [Accepted: 06/15/2016] [Indexed: 11/18/2022] Open
Abstract
γ-Aminobutyric acid is a non-protein amino acid involved in various metabolic processes. The objectives of this study were to examine whether increased GABA could improve heat tolerance in cool-season creeping bentgrass through physiological analysis, and to determine major metabolic pathways regulated by GABA through metabolic profiling. Plants were pretreated with 0.5 mM GABA or water before exposed to non-stressed condition (21/19 °C) or heat stress (35/30 °C) in controlled growth chambers for 35 d. The growth and physiological analysis demonstrated that exogenous GABA application significantly improved heat tolerance of creeping bentgrass. Metabolic profiling found that exogenous application of GABA led to increases in accumulations of amino acids (glutamic acid, aspartic acid, alanine, threonine, serine, and valine), organic acids (aconitic acid, malic acid, succinic acid, oxalic acid, and threonic acid), sugars (sucrose, fructose, glucose, galactose, and maltose), and sugar alcohols (mannitol and myo-inositol). These findings suggest that GABA-induced heat tolerance in creeping bentgrass could involve the enhancement of photosynthesis and ascorbate-glutathione cycle, the maintenance of osmotic adjustment, and the increase in GABA shunt. The increased GABA shunt could be the supply of intermediates to feed the tricarboxylic acid cycle of respiration metabolism during a long-term heat stress, thereby maintaining metabolic homeostasis.
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23
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Vannini C, Carpentieri A, Salvioli A, Novero M, Marsoni M, Testa L, de Pinto MC, Amoresano A, Ortolani F, Bracale M, Bonfante P. An interdomain network: the endobacterium of a mycorrhizal fungus promotes antioxidative responses in both fungal and plant hosts. THE NEW PHYTOLOGIST 2016; 211:265-275. [PMID: 26914272 DOI: 10.1111/nph.13895] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2015] [Accepted: 01/12/2016] [Indexed: 06/05/2023]
Abstract
Arbuscular mycorrhizal fungi (AMF) are obligate plant biotrophs that may contain endobacteria in their cytoplasm. Genome sequencing of Candidatus Glomeribacter gigasporarum revealed a reduced genome and dependence on the fungal host. RNA-seq analysis of the AMF Gigaspora margarita in the presence and absence of the endobacterium indicated that endobacteria have an important role in the fungal pre-symbiotic phase by enhancing fungal bioenergetic capacity. To improve the understanding of fungal-endobacterial interactions, iTRAQ (isobaric tags for relative and absolute quantification) quantitative proteomics was used to identify differentially expressed proteins in G. margarita germinating spores with endobacteria (B+), without endobacteria in the cured line (B-) and after application of the synthetic strigolactone GR24. Proteomic, transcriptomic and biochemical data identified several fungal and bacterial proteins involved in interspecies interactions. Endobacteria influenced fungal growth, calcium signalling and metabolism. The greatest effects were on fungal primary metabolism and respiration, which was 50% higher in B+ than in B-. A shift towards pentose phosphate metabolism was detected in B-. Quantification of carbonylated proteins indicated that the B- line had higher oxidative stress levels, which were also observed in two host plants. This study shows that endobacteria generate a complex interdomain network that affects AMF and fungal-plant interactions.
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Affiliation(s)
- Candida Vannini
- Department of Biotechnology and Life Science, Università dell'Insubria, via J.H. Dunant 3, I-21100, Varese, Italy
| | - Andrea Carpentieri
- Department of Chemical Sciences, Università di Napoli 'Federico II', via Cintia 4, I-80126, Napoli, Italy
| | - Alessandra Salvioli
- Department of Life Sciences and Systems Biology, Università di Torino, viale Mattioli 25, I-10125, Torino, Italy
| | - Mara Novero
- Department of Life Sciences and Systems Biology, Università di Torino, viale Mattioli 25, I-10125, Torino, Italy
| | - Milena Marsoni
- Department of Biotechnology and Life Science, Università dell'Insubria, via J.H. Dunant 3, I-21100, Varese, Italy
| | - Lorenzo Testa
- Department of Biotechnology and Life Science, Università dell'Insubria, via J.H. Dunant 3, I-21100, Varese, Italy
| | - Maria Concetta de Pinto
- Department of Biology, Università di Bari 'Aldo Moro', via E. Orabona 4, I-70125, Bari, Italy
| | - Angela Amoresano
- Department of Chemical Sciences, Università di Napoli 'Federico II', via Cintia 4, I-80126, Napoli, Italy
| | - Francesca Ortolani
- Department of Biotechnology and Life Science, Università dell'Insubria, via J.H. Dunant 3, I-21100, Varese, Italy
| | - Marcella Bracale
- Department of Biotechnology and Life Science, Università dell'Insubria, via J.H. Dunant 3, I-21100, Varese, Italy
| | - Paola Bonfante
- Department of Life Sciences and Systems Biology, Università di Torino, viale Mattioli 25, I-10125, Torino, Italy
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24
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Légeret B, Schulz-Raffelt M, Nguyen HM, Auroy P, Beisson F, Peltier G, Blanc G, Li-Beisson Y. Lipidomic and transcriptomic analyses of Chlamydomonas reinhardtii under heat stress unveil a direct route for the conversion of membrane lipids into storage lipids. PLANT, CELL & ENVIRONMENT 2016; 39:834-47. [PMID: 26477535 DOI: 10.1111/pce.12656] [Citation(s) in RCA: 92] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2015] [Revised: 10/01/2015] [Accepted: 10/06/2015] [Indexed: 05/18/2023]
Abstract
Studying how photosynthetic cells modify membrane lipids in response to heat stress is important to understand how plants and microalgae adapt to daily fluctuations in temperature and to investigate new lipid pathways. Here, we investigate changes occurring in lipid molecular species and lipid metabolism genes during early response to heat stress in the model photosynthetic microorganism Chlamydomonas reinhardtii. Lipid molecular species analyses revealed that, after 60 min at 42 °C, a strong decrease in specific polyunsaturated membrane lipids was observed together with an increase in polyunsaturated triacylglycerols (TAGs) and diacylglycerols (DAGs). The fact that decrease in the major chloroplastic monogalactosyldiacylglycerol sn1-18:3/sn2-16:4 was mirrored by an accumulation of DAG sn1-18:3/sn2-16:4 and TAG sn1-18:3/sn2-16:4/sn3-18:3 indicated that newly accumulated TAGs were formed via direct conversion of monogalactosyldiacylglycerols to DAGs then TAGs. Lipidomic analyses showed that the third fatty acid of a TAG likely originated from a phosphatidylethanolamine or a diacylglyceryl-O-4'-(N,N,N,-trimethyl)-homoserine betaine lipid species. Candidate genes for this TAG synthesis pathway were provided through comparative transcriptomic analysis and included a phospholipase A2 homolog and the DAG acyltransferase DGTT1. This study gives insights into the molecular events underlying changes in membrane lipids during heat stress and reveals an alternative route for TAG synthesis.
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Affiliation(s)
- B Légeret
- Commissariat à l'Energie Atomique et aux Energies Alternatives, Institut de Biologie Environnementale et Biotechnologie, CEA Cadarache, Saint-Paul-lez-Durance, France
- Centre National de la Recherche Scientifique, UMR7265, Saint-Paul-lez-Durance, France
- Aix-Marseille Université, UMR7265, Marseille, France
| | - M Schulz-Raffelt
- Commissariat à l'Energie Atomique et aux Energies Alternatives, Institut de Biologie Environnementale et Biotechnologie, CEA Cadarache, Saint-Paul-lez-Durance, France
- Centre National de la Recherche Scientifique, UMR7265, Saint-Paul-lez-Durance, France
- Aix-Marseille Université, UMR7265, Marseille, France
| | - H M Nguyen
- Commissariat à l'Energie Atomique et aux Energies Alternatives, Institut de Biologie Environnementale et Biotechnologie, CEA Cadarache, Saint-Paul-lez-Durance, France
- Centre National de la Recherche Scientifique, UMR7265, Saint-Paul-lez-Durance, France
- Aix-Marseille Université, UMR7265, Marseille, France
| | - P Auroy
- Commissariat à l'Energie Atomique et aux Energies Alternatives, Institut de Biologie Environnementale et Biotechnologie, CEA Cadarache, Saint-Paul-lez-Durance, France
- Centre National de la Recherche Scientifique, UMR7265, Saint-Paul-lez-Durance, France
- Aix-Marseille Université, UMR7265, Marseille, France
| | - F Beisson
- Commissariat à l'Energie Atomique et aux Energies Alternatives, Institut de Biologie Environnementale et Biotechnologie, CEA Cadarache, Saint-Paul-lez-Durance, France
- Centre National de la Recherche Scientifique, UMR7265, Saint-Paul-lez-Durance, France
- Aix-Marseille Université, UMR7265, Marseille, France
| | - G Peltier
- Commissariat à l'Energie Atomique et aux Energies Alternatives, Institut de Biologie Environnementale et Biotechnologie, CEA Cadarache, Saint-Paul-lez-Durance, France
- Centre National de la Recherche Scientifique, UMR7265, Saint-Paul-lez-Durance, France
- Aix-Marseille Université, UMR7265, Marseille, France
| | - G Blanc
- Laboratoire Information Génomique & Structurale, UMR7256 (IMM FR3479) CNRS Aix-Marseille Université, Marseille, France
| | - Y Li-Beisson
- Commissariat à l'Energie Atomique et aux Energies Alternatives, Institut de Biologie Environnementale et Biotechnologie, CEA Cadarache, Saint-Paul-lez-Durance, France
- Centre National de la Recherche Scientifique, UMR7265, Saint-Paul-lez-Durance, France
- Aix-Marseille Université, UMR7265, Marseille, France
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25
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Sabetta W, Vannini C, Sgobba A, Marsoni M, Paradiso A, Ortolani F, Bracale M, Viggiano L, Blanco E, de Pinto MC. Cyclic AMP deficiency negatively affects cell growth and enhances stress-related responses in tobacco Bright Yellow-2 cells. PLANT MOLECULAR BIOLOGY 2016; 90:467-83. [PMID: 26786166 DOI: 10.1007/s11103-016-0431-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/11/2015] [Accepted: 01/05/2016] [Indexed: 05/24/2023]
Abstract
Cyclic adenosine 3',5'-monophosphate (cAMP) is a recognized second messenger; however, knowledge of cAMP involvement in plant physiological processes originates primarily from pharmacological studies. To obtain direct evidence for cAMP function in plants, tobacco Bright Yellow-2 (BY-2) cells were transformed with the cAMP sponge, which is a genetically encoded tool that reduces cAMP availability. BY-2 cells expressing the cAMP sponge (cAS cells), showed low levels of free cAMP and exhibited growth inhibition that was not proportional to the cAMP sponge transcript level. Growth inhibition in cAS cells was closely related to the precocious inhibition of mitosis due to a delay in cell cycle progression. The cAMP deficiency also enhanced antioxidant systems. Remarkable changes occurred in the cAS proteomic profile compared with that of wild-type (WT) cells. Proteins involved in translation, cytoskeletal organization, and cell proliferation were down-regulated, whereas stress-related proteins were up-regulated in cAS cells. These results support the hypothesis that BY-2 cells sense cAMP deficiency as a stress condition. Finally, many proteasome subunits were differentially expressed in cAS cells compared with WT cells, indicating that cAMP signaling broadly affects protein degradation via the ubiquitin/proteasome pathway.
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Affiliation(s)
- Wilma Sabetta
- Istituto di Bioscienze e Biorisorse, CNR, Via G. Amendola 165/A, 70126, Bari, Italy
| | - Candida Vannini
- Dipartimento di Biotecnologie e Scienze della Vita, Università degli Studi dell'Insubria, Via H. J. Dunant 3, 21100, Varese, Italy
| | - Alessandra Sgobba
- Dipartimento di Biologia, Università degli Studi di Bari "Aldo Moro", via E. Orabona 4, 70125, Bari, Italy
| | - Milena Marsoni
- Dipartimento di Biotecnologie e Scienze della Vita, Università degli Studi dell'Insubria, Via H. J. Dunant 3, 21100, Varese, Italy
| | - Annalisa Paradiso
- Dipartimento di Biologia, Università degli Studi di Bari "Aldo Moro", via E. Orabona 4, 70125, Bari, Italy
| | - Francesca Ortolani
- Dipartimento di Biotecnologie e Scienze della Vita, Università degli Studi dell'Insubria, Via H. J. Dunant 3, 21100, Varese, Italy
| | - Marcella Bracale
- Dipartimento di Biotecnologie e Scienze della Vita, Università degli Studi dell'Insubria, Via H. J. Dunant 3, 21100, Varese, Italy
| | - Luigi Viggiano
- Dipartimento di Biologia, Università degli Studi di Bari "Aldo Moro", via E. Orabona 4, 70125, Bari, Italy
| | - Emanuela Blanco
- Istituto di Bioscienze e Biorisorse, CNR, Via G. Amendola 165/A, 70126, Bari, Italy
| | - Maria Concetta de Pinto
- Dipartimento di Biologia, Università degli Studi di Bari "Aldo Moro", via E. Orabona 4, 70125, Bari, Italy.
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Chin DC, Hsieh CC, Lin HY, Yeh KW. A Low Glutathione Redox State Couples with a Decreased Ascorbate Redox Ratio to Accelerate Flowering in Oncidium Orchid. PLANT & CELL PHYSIOLOGY 2016; 57:423-436. [PMID: 26738548 DOI: 10.1093/pcp/pcv206] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2015] [Accepted: 12/18/2015] [Indexed: 06/05/2023]
Abstract
Glutathione (GSH) plays multiple roles in plants, including stress defense and regulation of growth/development. Previous studies have demonstrated that the ascorbate (AsA) redox state is involved in flowering initiation in Oncidium orchid. In this study, we discovered that a significantly decreased GSH content and GSH redox ratio are correlated with a decline in the AsA redox state during flowering initiation and high ambient temperature-induced flowering. At the same time, the expression level and enzymatic activity of GSH redox-regulated genes, glutathione reductase (GR1), and the GSH biosynthesis genes γ-glutamylcysteine synthetase (GSH1) and glutathione synthase (GSH2), are down-regulated. Elevating dehydroascorbate (DHA) content in Oncidium by artificial addition of DHA resulted in a decreased AsA and GSH redox ratio, and enhanced dehydroascorbate reductase (DHAR) activity. This demonstrated that the lower GSH redox state could be influenced by the lower AsA redox ratio. Moreover, exogenous application of buthionine sulfoximine (BSO), to inhibit GSH biosynthesis, and glutathione disulfide (GSSG), to decrease the GSH redox ratio, also caused early flowering. However, spraying plants with GSH increased the GSH redox ratio and delayed flowering. Furthermore, transgenic Arabidopsis overexpressing Oncidium GSH1, GSH2 and GR1 displayed a high GSH redox ratio as well as delayed flowering under high ambient temperature treatment, while pad2, cad2 and gr1 mutants exhibited early flowering and a low GSH redox ratio. In conclusion, our results provide evidence that the decreased GSH redox state is linked to the decline in the AsA redox ratio and mediated by down-regulated expression of GSH metabolism-related genes to affect flowering time in Oncidium orchid.
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Affiliation(s)
- Dan-Chu Chin
- Institute of Plant Biology, National Taiwan University, Taipei, Taiwan. No. 1, Sec. 4, Roosevelt Road, Taipei, 10617 Taiwan
| | - Chia-Chi Hsieh
- Institute of Plant Biology, National Taiwan University, Taipei, Taiwan. No. 1, Sec. 4, Roosevelt Road, Taipei, 10617 Taiwan
| | - Hsin-Yi Lin
- Institute of Plant Biology, National Taiwan University, Taipei, Taiwan. No. 1, Sec. 4, Roosevelt Road, Taipei, 10617 Taiwan
| | - Kai-Wun Yeh
- Institute of Plant Biology, National Taiwan University, Taipei, Taiwan. No. 1, Sec. 4, Roosevelt Road, Taipei, 10617 Taiwan
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Shahzad R, Waqas M, Khan AL, Hamayun M, Kang SM, Lee IJ. Foliar application of methyl jasmonate induced physio-hormonal changes in Pisum sativum under diverse temperature regimes. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2015; 96:406-16. [PMID: 26379199 DOI: 10.1016/j.plaphy.2015.08.020] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2015] [Revised: 07/15/2015] [Accepted: 08/25/2015] [Indexed: 05/26/2023]
Abstract
Global climate change brings with it unwarranted shifts in both abiotic (heat stress, cold stress, wind, precipitation) and biotic (pathogens, pests) environmental factors, thus posing a threat to agricultural productivity across the world. In plants, lodging due to storms or herbivory causes wounding stress and consequently enhances endogenous jasmonates. In response, the plant growth is arrested as plant defense is prioritized. We pre-treated pea plants with elevated methyl jasmonate (MeJA) levels i.e. 50 μM, 100 μM and 200 μM under controlled growth chamber conditions. The pre-treated plants were then kept at 40 °C (heat stress--HS), 4 °C (cold stress--CS) and 20 °C (optimum/control temperature--OT) for 72 h. The effect of such treatments on plant growth attributes, photosynthesis, stomatal conductance, cell death rate, and regulation of endogenous hormones were observed. Elevated MeJA application hindered plant growth attributes under HS, CS and OT conditions. Moreover, elevated MeJA levels lowered the rate of photosynthesis and stomatal conductance, induced stomatal closure, caused higher cells mortality in leaves under HS, CS, and OT conditions. Endogenous ABA contents significantly declined in all MeJA treatments under HS and OT, but increased under CS conditions. Exogenous MeJA enhanced endogenous jasmonic acid contents of pea plants, but altered endogenous salicylic acid contents under varying temperatures. Current study shows that higher concentrations of exogenous MeJA strengthen plant defense mechanism by hindering plant growth under stress conditions.
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Affiliation(s)
- Raheem Shahzad
- School of Applied Biosciences, Kyungpook National University, Daegu, Republic of Korea
| | - Muhammad Waqas
- School of Applied Biosciences, Kyungpook National University, Daegu, Republic of Korea; Department of Agriculture Extension, Buner 19290, Pakistan
| | - Abdul Latif Khan
- UoN Chair of Oman's Medicinal Plants & Marine Natural Products, University of Nizwa, 616 Nizwa, Oman
| | - Muhammad Hamayun
- School of Applied Biosciences, Kyungpook National University, Daegu, Republic of Korea; Department of Botany, Abdul Wali Khan University Mardan, Pakistan
| | - Sang-Mo Kang
- School of Applied Biosciences, Kyungpook National University, Daegu, Republic of Korea
| | - In-Jung Lee
- School of Applied Biosciences, Kyungpook National University, Daegu, Republic of Korea.
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Centomani I, Sgobba A, D'Addabbo P, Dipierro N, Paradiso A, De Gara L, Dipierro S, Viggiano L, de Pinto MC. Involvement of DNA methylation in the control of cell growth during heat stress in tobacco BY-2 cells. PROTOPLASMA 2015; 252:1451-9. [PMID: 25712591 DOI: 10.1007/s00709-015-0772-y] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2014] [Accepted: 01/26/2015] [Indexed: 05/24/2023]
Abstract
The alteration of growth patterns, through the adjustment of cell division and expansion, is a characteristic response of plants to environmental stress. In order to study this response in more depth, the effect of heat stress on growth was investigated in tobacco BY-2 cells. The results indicate that heat stress inhibited cell division, by slowing cell cycle progression. Cells were stopped in the pre-mitotic phases, as shown by the increased expression of CycD3-1 and by the decrease in the NtCycA13, NtCyc29 and CDKB1-1 transcripts. The decrease in cell length and the reduced expression of Nt-EXPA5 indicated that cell expansion was also inhibited. Since DNA methylation plays a key role in controlling gene expression, the possibility that the altered expression of genes involved in the control of cell growth, observed during heat stress, could be due to changes in the methylation state of their promoters was investigated. The results show that the altered expression of CycD3-1 and Nt-EXPA5 was consistent with changes in the methylation state of the upstream region of these genes. These results suggest that DNA methylation, controlling the expression of genes involved in plant development, contributes to growth alteration occurring in response to environmental changes.
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Affiliation(s)
- Isabella Centomani
- Dipartimento di Biologia, Università degli Studi di Bari "Aldo Moro", via E. Orabona 4, 70125, Bari, Italy
| | - Alessandra Sgobba
- Dipartimento di Biologia, Università degli Studi di Bari "Aldo Moro", via E. Orabona 4, 70125, Bari, Italy
| | - Pietro D'Addabbo
- Dipartimento di Biologia, Università degli Studi di Bari "Aldo Moro", via E. Orabona 4, 70125, Bari, Italy
| | - Nunzio Dipierro
- Dipartimento di Biologia, Università degli Studi di Bari "Aldo Moro", via E. Orabona 4, 70125, Bari, Italy
| | - Annalisa Paradiso
- Dipartimento di Biologia, Università degli Studi di Bari "Aldo Moro", via E. Orabona 4, 70125, Bari, Italy
| | - Laura De Gara
- Centro Integrato di Ricerca, Università Campus Bio-Medico di Roma, via A. del Portillo 21, 00128, Rome, Italy
| | - Silvio Dipierro
- Dipartimento di Biologia, Università degli Studi di Bari "Aldo Moro", via E. Orabona 4, 70125, Bari, Italy
| | - Luigi Viggiano
- Dipartimento di Biologia, Università degli Studi di Bari "Aldo Moro", via E. Orabona 4, 70125, Bari, Italy
| | - Maria Concetta de Pinto
- Dipartimento di Biologia, Università degli Studi di Bari "Aldo Moro", via E. Orabona 4, 70125, Bari, Italy.
- Istituto di Bioscienze e Biorisorse, CNR, Via G. Amendola 165/A, 70126, Bari, Italy.
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Ortiz-Espín A, Locato V, Camejo D, Schiermeyer A, De Gara L, Sevilla F, Jiménez A. Over-expression of Trxo1 increases the viability of tobacco BY-2 cells under H2O2 treatment. ANNALS OF BOTANY 2015; 116:571-82. [PMID: 26041732 PMCID: PMC4577997 DOI: 10.1093/aob/mcv076] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2015] [Revised: 02/24/2015] [Accepted: 04/16/2015] [Indexed: 05/23/2023]
Abstract
BACKGROUND AND AIMS Reactive oxygen species (ROS), especially hydrogen peroxide, play a critical role in the regulation of plant development and in the induction of plant defence responses during stress adaptation, as well as in plant cell death. The antioxidant system is responsible for controlling ROS levels in these processes but redox homeostasis is also a key factor in plant cell metabolism under normal and stress situations. Thioredoxins (Trxs) are ubiquitous small proteins found in different cell compartments, including mitochondria and nuclei (Trxo1), and are involved in the regulation of target proteins through reduction of disulphide bonds, although their role under oxidative stress has been less well studied. This study describes over-expression of a Trxo1 for the first time, using a cell-culture model subjected to an oxidative treatment provoked by H2O2. METHODS Control and over-expressing PsTrxo1 tobacco (Nicotiana tabacum) BY-2 cells were treated with 35 mm H2O2 and the effects were analysed by studying the growth dynamics of the cultures together with oxidative stress parameters, as well as several components of the antioxidant systems involved in the metabolism of H2O2. Analysis of different hallmarks of programmed cell death was also carried out. KEY RESULTS Over-expression of PsTrxo1 caused significant differences in the response of TBY-2 cells to high concentrations of H2O2, namely higher and maintained viability in over-expressing cells, whilst the control line presented a severe decrease in viability and marked indications of oxidative stress, with generalized cell death after 3 d of treatment. In over-expressing cells, an increase in catalase activity, decreases in H2O2 and nitric oxide contents and maintenance of the glutathione redox state were observed. CONCLUSIONS A decreased content of endogenous H2O2 may be responsible in part for the delayed cell death found in over-expressing cells, in which changes in oxidative parameters and antioxidants were less extended after the oxidative treatment. It is concluded that PsTrxo1 transformation protects TBY-2 cells from exogenous H2O2, thus increasing their viability via a process in which not only antioxidants but also Trxo1 seem to be involved.
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Affiliation(s)
- Ana Ortiz-Espín
- CEBAS-CSIC, Department of Stress Biology and Plant Pathology, Campus Universitario de Espinardo Murcia, E-30100, Spain
| | - Vittoria Locato
- Laboratory of Plant Biochemistry and Food Science, Campus Bio-Medico University of Rome, Via Alvaro del Portillo 21, I-00128, Rome, Italy and
| | - Daymi Camejo
- CEBAS-CSIC, Department of Stress Biology and Plant Pathology, Campus Universitario de Espinardo Murcia, E-30100, Spain
| | - Andreas Schiermeyer
- Fraunhofer Institute for Molecular Biology and Applied Ecology IME, Department of Plant Biotechnology, Forckenbeckstrasse 6, D-52074, Aachen, Germany
| | - Laura De Gara
- Laboratory of Plant Biochemistry and Food Science, Campus Bio-Medico University of Rome, Via Alvaro del Portillo 21, I-00128, Rome, Italy and
| | - Francisca Sevilla
- CEBAS-CSIC, Department of Stress Biology and Plant Pathology, Campus Universitario de Espinardo Murcia, E-30100, Spain
| | - Ana Jiménez
- CEBAS-CSIC, Department of Stress Biology and Plant Pathology, Campus Universitario de Espinardo Murcia, E-30100, Spain,
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de Pinto MC, Locato V, Paradiso A, De Gara L. Role of redox homeostasis in thermo-tolerance under a climate change scenario. ANNALS OF BOTANY 2015; 116:487-96. [PMID: 26034009 PMCID: PMC4577993 DOI: 10.1093/aob/mcv071] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/09/2015] [Revised: 02/17/2015] [Accepted: 03/30/2015] [Indexed: 05/18/2023]
Abstract
BACKGROUND Climate change predictions indicate a progressive increase in average temperatures and an increase in the frequency of heatwaves, which will have a negative impact on crop productivity. Over the last decade, a number of studies have addressed the question of how model plants or specific crops modify their metabolism when exposed to heat stress. SCOPE This review provides an overview of the redox pathways that contribute to how plants cope with heat stress. The focus is on the role of reactive oxygen species (ROS), redox metabolites and enzymes in the signalling pathways leading to the activation of defence responses. Additional attention is paid to the regulating mechanisms that lead to an increase in specific ROS-scavenging systems during heat stress, which have been studied in different model systems. Finally, increasing thermo-tolerance in model and crop plants by exposing them to heat acclimation or to exogenous treatments is discussed. CONCLUSIONS Although there is clear evidence that several strategies are specifically activated according to the intensity and the duration of heat stress, as well as the capacity of the different species or genotypes to overcome stress, an alteration in redox homeostasis seems to be a common event. Different mechanisms that act to enhance redox systems enable crops to overcome heat stress more effectively. Knowledge of thermo-tolerance within agronomic biodiversity is thus of key importance to enable researchers to identify new strategies for overcoming the impacts of climate change, and for decision-makers in planning for an uncertain future with new choices and options open to them.
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Affiliation(s)
- Maria Concetta de Pinto
- Dipartimento di Biologia, Università degli Studi di Bari 'Aldo Moro', via E. Orabona 4, I-70125 Bari, Italy and
| | - Vittoria Locato
- Laboratory of Plant Biochemistry and Food Sciences, Università Campus Bio-Medico di Roma, Via Alvaro del Portillo 21, I-00128 Roma, Italy
| | - Annalisa Paradiso
- Dipartimento di Biologia, Università degli Studi di Bari 'Aldo Moro', via E. Orabona 4, I-70125 Bari, Italy and
| | - Laura De Gara
- Laboratory of Plant Biochemistry and Food Sciences, Università Campus Bio-Medico di Roma, Via Alvaro del Portillo 21, I-00128 Roma, Italy
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Dong X, Yi H, Lee J, Nou IS, Han CT, Hur Y. Global Gene-Expression Analysis to Identify Differentially Expressed Genes Critical for the Heat Stress Response in Brassica rapa. PLoS One 2015; 10:e0130451. [PMID: 26102990 PMCID: PMC4477974 DOI: 10.1371/journal.pone.0130451] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2015] [Accepted: 05/20/2015] [Indexed: 01/08/2023] Open
Abstract
Genome-wide dissection of the heat stress response (HSR) is necessary to overcome problems in crop production caused by global warming. To identify HSR genes, we profiled gene expression in two Chinese cabbage inbred lines with different thermotolerances, Chiifu and Kenshin. Many genes exhibited >2-fold changes in expression upon exposure to 0.5– 4 h at 45°C (high temperature, HT): 5.2% (2,142 genes) in Chiifu and 3.7% (1,535 genes) in Kenshin. The most enriched GO (Gene Ontology) items included ‘response to heat’, ‘response to reactive oxygen species (ROS)’, ‘response to temperature stimulus’, ‘response to abiotic stimulus’, and ‘MAPKKK cascade’. In both lines, the genes most highly induced by HT encoded small heat shock proteins (Hsps) and heat shock factor (Hsf)-like proteins such as HsfB2A (Bra029292), whereas high-molecular weight Hsps were constitutively expressed. Other upstream HSR components were also up-regulated: ROS-scavenging genes like glutathione peroxidase 2 (BrGPX2, Bra022853), protein kinases, and phosphatases. Among heat stress (HS) marker genes in Arabidopsis, only exportin 1A (XPO1A) (Bra008580, Bra006382) can be applied to B. rapa for basal thermotolerance (BT) and short-term acquired thermotolerance (SAT) gene. CYP707A3 (Bra025083, Bra021965), which is involved in the dehydration response in Arabidopsis, was associated with membrane leakage in both lines following HS. Although many transcription factors (TF) genes, including DREB2A (Bra005852), were involved in HS tolerance in both lines, Bra024224 (MYB41) and Bra021735 (a bZIP/AIR1 [Anthocyanin-Impaired-Response-1]) were specific to Kenshin. Several candidate TFs involved in thermotolerance were confirmed as HSR genes by real-time PCR, and these assignments were further supported by promoter analysis. Although some of our findings are similar to those obtained using other plant species, clear differences in Brassica rapa reveal a distinct HSR in this species. Our data could also provide a springboard for developing molecular markers of HS and for engineering HS tolerant B. rapa.
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Affiliation(s)
- Xiangshu Dong
- Department of Biology, College of Biological Science and Biotechnology, Chungnam National University, Daejeon, Republic of Korea
| | - Hankuil Yi
- Department of Biology, College of Biological Science and Biotechnology, Chungnam National University, Daejeon, Republic of Korea
| | - Jeongyeo Lee
- Department of Biology, College of Biological Science and Biotechnology, Chungnam National University, Daejeon, Republic of Korea
| | - Ill-Sup Nou
- Department of Horticulture, Sunchon National University, Suncheon, Jeonnam, Republic of Korea
| | - Ching-Tack Han
- Department of Life Science, Sogang University, Seoul, Republic of Korea
- * E-mail: (YH); (CTH)
| | - Yoonkang Hur
- Department of Biology, College of Biological Science and Biotechnology, Chungnam National University, Daejeon, Republic of Korea
- * E-mail: (YH); (CTH)
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Driedonks N, Xu J, Peters JL, Park S, Rieu I. Multi-Level Interactions Between Heat Shock Factors, Heat Shock Proteins, and the Redox System Regulate Acclimation to Heat. FRONTIERS IN PLANT SCIENCE 2015; 6:999. [PMID: 26635827 PMCID: PMC4647109 DOI: 10.3389/fpls.2015.00999] [Citation(s) in RCA: 130] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/05/2015] [Accepted: 10/30/2015] [Indexed: 05/12/2023]
Abstract
High temperature has become a global concern because it seriously affects the growth and reproduction of plants. Exposure of plant cells to high temperatures result in cellular damage and can even lead to cell death. Part of the damage can be ascribed to the action of reactive oxygen species (ROS), which accumulate during abiotic stresses such as heat stress. ROS are toxic and can modify other biomacromolecules including membrane lipids, DNA, and proteins. In order to protect the cells, ROS scavenging is essential. In contrast with their inherent harms, ROS also function as signaling molecules, inducing stress tolerance mechanisms. This review examines the evidence for crosstalk between the classical heat stress response, which consists of heat shock factors (HSFs) and heat shock proteins (HSPs), with the ROS network at multiple levels in the heat response process. Heat stimulates HSF activity directly, but also indirectly via ROS. HSFs in turn stimulate the expression of HSP chaperones and also affect ROS scavenger gene expression. In the short term, HSFs repress expression of superoxide dismutase scavenger genes via induction of miRNA398, while they also activate scavenger gene expression and stabilize scavenger protein activity via HSP induction. We propose that these contrasting effects allow for the boosting of the heat stress response at the very onset of the stress, while preventing subsequent oxidative damage. The described model on HSFs, HSPs, ROS, and ROS scavenger interactions seems applicable to responses to stresses other than heat and may explain the phenomenon of crossacclimation.
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Affiliation(s)
- Nicky Driedonks
- Department of Molecular Plant Physiology, Institute for Water and Wetland Research, Radboud University, Nijmegen, Netherlands
| | - Jiemeng Xu
- Department of Molecular Plant Physiology, Institute for Water and Wetland Research, Radboud University, Nijmegen, Netherlands
| | - Janny L. Peters
- Department of Molecular Plant Physiology, Institute for Water and Wetland Research, Radboud University, Nijmegen, Netherlands
| | - Sunghun Park
- Department of Horticulture, Forestry and Recreation Resources, Kansas State University, Manhattan, KS, USA
| | - Ivo Rieu
- Department of Molecular Plant Physiology, Institute for Water and Wetland Research, Radboud University, Nijmegen, Netherlands
- *Correspondence: Ivo Rieu,
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Treidel LA, Carter AW, Bowden RM. Temperature experienced during incubation affects antioxidant capacity but not oxidative damage in hatchling red-eared slider turtles (Trachemys scripta elegans). J Exp Biol 2015; 219:561-70. [DOI: 10.1242/jeb.128843] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2015] [Accepted: 12/01/2015] [Indexed: 11/20/2022]
Abstract
Our understanding of how oxidative stress resistance phenotypes are affected by the developmental environment is limited. One component of the developmental environment, which is likely central to early life oxidative stress among ectothermic and oviparous species, is that of temperature. We investigated how incubation temperature manipulations affect oxidative damage and total antioxidant capacity (TAC) in red-eared slider turtle (Trachemys scripta elegans) hatchlings. First, to determine if temperature fluctuations elicit oxidative stress, eggs from clutches were randomly assigned to either a constant (29.5°C) or daily fluctuating temperature incubation (28.7±3°C) treatment. Second, to assess the effect of temperature fluctuation frequency on oxidative stress, eggs were incubated in one of three fluctuating incubation regimes; 28.7±3°C fluctuations every 12 (Hyper), 24 (Normal), or 48 hours (Hypo). Third, we tested the influence of average incubation temperature by incubating eggs in a daily fluctuating incubation temperature regime with a mean temperature of 26.5°C (Low), 27.1°C (Medium), or 27.7°C (High). Although the accumulation of oxidative damage in hatchlings was unaffected by any thermal manipulation, TAC was affected by both temperature fluctuation frequency and average incubation temperature. Individuals incubated with a low frequency of temperature fluctuations had reduced TAC, while incubation at a lower average temperature was associated with enhanced TAC. These results indicate that while sufficient to prevent oxidative damage, TAC is influenced by developmental thermal environments, potentially due to temperature mediated changes in metabolic rate. The observed differences in TAC may have important future consequences for hatchling fitness and overwinter survival.
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Affiliation(s)
- L. A. Treidel
- School of Biological Sciences, Illinois State University Normal IL, 61761, USA
| | - A. W. Carter
- School of Biological Sciences, Illinois State University Normal IL, 61761, USA
| | - R. M. Bowden
- School of Biological Sciences, Illinois State University Normal IL, 61761, USA
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