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Yuan MH, Kang S, Cho KS. A review of phyto- and microbial-remediation of indoor volatile organic compounds. CHEMOSPHERE 2024; 359:142120. [PMID: 38670503 DOI: 10.1016/j.chemosphere.2024.142120] [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: 01/26/2024] [Revised: 04/04/2024] [Accepted: 04/21/2024] [Indexed: 04/28/2024]
Abstract
Volatile organic compounds (VOCs) are crucial air pollutants in indoor environments, emitted from building materials, furniture, consumer products, cleaning products, smoking, fuel combustion, cooking, and other sources. VOCs are also emitted from human beings via breath and whole-body skin. Some VOCs cause dermal/ocular irritation as well as gastrointestinal, neurological, cardiovascular, and/or carcinogenic damage to human health. Because people spend most of their time indoors, active control of indoor VOCs has garnered attention. Phytoremediation and microbial remediation, based on plant and microorganism activities, are deemed sustainable, cost-effective, and public-friendly technologies for mitigating indoor VOCs. This study presents the major sources of VOCs in indoor environments and their compositions. Various herbaceous and woody plants used to mitigate indoor VOCs are summarized and their VOCs removal performance is compared. Moreover, this paper reviews the current state of active phytoremediation and microbial remediation for the control of indoor VOCs, and discusses future directions.
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Affiliation(s)
- Min-Hao Yuan
- Department of Occupational Safety and Health, China Medical University, Taichung, 406, Taiwan
| | - Sookyung Kang
- Department of Environmental Science and Engineering, Ewha Womans University, Seoul, 03760, Republic of Korea
| | - Kyung-Suk Cho
- Department of Environmental Science and Engineering, Ewha Womans University, Seoul, 03760, Republic of Korea.
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Zhao X, Yang X, Li Y, Nian H, Li K. 14-3-3 proteins regulate the HCHO stress response by interacting with AtMDH1 and AtGS1 in tobacco and Arabidopsis. JOURNAL OF HAZARDOUS MATERIALS 2023; 458:132036. [PMID: 37453350 DOI: 10.1016/j.jhazmat.2023.132036] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2023] [Revised: 07/03/2023] [Accepted: 07/09/2023] [Indexed: 07/18/2023]
Abstract
Formaldehyde (HCHO) is one of the most essential common carcinogenic environmental pollutants. While 14-3-3 proteins are known to regulate the response of plants to HCHO stress, the regulatory mechanisms responsible for a tolerant phenotype remain unclear. We first performed qPCR analysis of HCHO-treated Arabidopsis and tobacco and determined that the expression of At14-3-3PSI and Nt14-3-3C genes was rapidly upregulated after HCHO stress. Furthermore, overexpression of 14-3-3, AtMDH1 or AtGS1 genes enhanced plant HCHO absorption capacity and resistance, and knockdown or knockout of 14-3-3, AtMDH1 or AtGS1 genes reduced plant HCHO absorption capacity and resistance. However, overexpression of the AtGS1 and AtMDH1 genes in the At14-3-3 psi mutant restored HCHO uptake and resistance in Arabidopsis. Moreover, 14-3-3 bound to the N-terminus of AtMDH1 and the C-terminus of AtGS1, respectively, and repressed and enhanced their expression. The 13C NMR results of HCHO stress mutants Atgs1 and Atmdh1 showed that the metabolites Glu and Asp rapidly increased, indicating that AtGS1 and AtMDH1 were indeed indispensable for Arabidopsis to metabolize HCHO. In conclusion, we uncovered a HCHO stress response mechanism mediated by 14-3-3, which enhances the plant's ability to absorb HCHO, deepening our understanding of how plants respond to HCHO stress.
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Affiliation(s)
- Xing Zhao
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Chenggong, 650500 Kunming, China
| | - Xueting Yang
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Chenggong, 650500 Kunming, China
| | - Yunfang Li
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Chenggong, 650500 Kunming, China
| | - Hongjuan Nian
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Chenggong, 650500 Kunming, China
| | - Kunzhi Li
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Chenggong, 650500 Kunming, China.
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Proteomic Analysis of Proteins Related to Defense Responses in Arabidopsis Plants Transformed with the rolB Oncogene. Int J Mol Sci 2023; 24:ijms24031880. [PMID: 36768198 PMCID: PMC9915171 DOI: 10.3390/ijms24031880] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2022] [Revised: 01/10/2023] [Accepted: 01/16/2023] [Indexed: 01/20/2023] Open
Abstract
During Agrobacterium rhizogenes-plant interaction, the rolB gene is transferred into the plant genome and is stably inherited in the plant's offspring. Among the numerous effects of rolB on plant metabolism, including the activation of secondary metabolism, its effect on plant defense systems has not been sufficiently studied. In this work, we performed a proteomic analysis of rolB-expressing Arabidopsis thaliana plants with particular focus on defense proteins. We found a total of 77 overexpressed proteins and 64 underexpressed proteins in rolB-transformed plants using two-dimensional gel electrophoresis and MALDI mass spectrometry. In the rolB-transformed plants, we found a reduced amount of scaffold proteins RACK1A, RACK1B, and RACK1C, which are known as receptors for activated C-kinase 1. The proteomic analysis showed that rolB could suppress the plant immune system by suppressing the RNA-binding proteins GRP7, CP29B, and CP31B, which action are similar to the action of type-III bacterial effectors. At the same time, rolB plants induce the massive biosynthesis of protective proteins VSP1 and VSP2, as well as pathogenesis-related protein PR-4, which are markers of the activated jasmonate pathway. The increased contents of glutathione-S-transferases F6, F2, F10, U19, and DHAR1 and the osmotin-like defense protein OSM34 were found. The defense-associated protein PCaP1, which is required for oligogalacturonide-induced priming and immunity, was upregulated. Moreover, rolB-transformed plants showed the activation of all components of the PYK10 defense complex that is involved in the metabolism of glucosinolates. We hypothesized that various defense systems activated by rolB protect the host plant from competing phytopathogens and created an effective ecological niche for A. rhizogenes. A RolB → RACK1A signaling module was proposed that might exert most of the rolB-mediated effects on plant physiology. Our proteomics data are available via ProteomeXchange with identifier PXD037959.
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New Insight into Short Time Exogenous Formaldehyde Application Mediated Changes in Chlorophytum comosum L. (Spider Plant) Cellular Metabolism. Cells 2023; 12:cells12020232. [PMID: 36672168 PMCID: PMC9857029 DOI: 10.3390/cells12020232] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2022] [Revised: 12/24/2022] [Accepted: 12/28/2022] [Indexed: 01/09/2023] Open
Abstract
Chlorophytum comosum L. plants are known to effectively absorb air pollutants, including formaldehyde (HCHO). Since the metabolic and defense responses of C. comosum to HCHO are poorly understood, in the present study, biochemical changes in C. comosum leaves induced by 48 h exposure to exogenous HCHO, applied as 20 mg m-3, were analyzed. The observed changes showed that HCHO treatment caused no visible harmful effects on C. comosum leaves and seemed to be effectively metabolized by this plant. HCHO application caused no changes in total chlorophyll (Chl) and Chl a content, increased Chl a/b ratio, and decreased Chl b and carotenoid content. HCHO treatment affected sugar metabolism, towards the utilization of sucrose and synthesis or accumulation of glucose, and decreased activities of aspartate and alanine aminotransferases, suggesting that these enzymes do not play any pivotal role in amino acid transformations during HCHO assimilation. The total phenolic content in leaf tissues did not change in comparison to the untreated plants. The obtained results suggest that HCHO affects nitrogen and carbohydrate metabolism, effectively influencing photosynthesis, shortly after plant exposure to this volatile compound. It may be suggested that the observed changes are related to early HCHO stress symptoms or an early step of the adaptation of cells to HCHO treatment. The presented results confirm for the first time the direct influence of short time HCHO exposure on the studied parameters in the C. comosum plant leaf tissues.
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He Q, Jin J, Li P, Zhu H, Wang Z, Fan W, Yang JL. Involvement of SlSTOP1 regulated SlFDH expression in aluminum tolerance by reducing NAD + to NADH in the tomato root apex. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2023; 113:387-401. [PMID: 36471650 DOI: 10.1111/tpj.16054] [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: 10/10/2022] [Revised: 11/28/2022] [Accepted: 11/30/2022] [Indexed: 06/17/2023]
Abstract
Formate dehydrogenase (FDH; EC 1.2.1.2.) has been implicated in plant responses to a variety of stresses, including aluminum (Al) stress in acidic soils. However, the role of this enzyme in Al tolerance is not yet fully understood, and how FDH gene expression is regulated is unknown. Here, we report the identification and functional characterization of the tomato (Solanum lycopersicum) SlFDH gene. SlFDH encodes a mitochondria-localized FDH with Km values of 2.087 mm formate and 29.1 μm NAD+ . Al induced the expression of SlFDH in tomato root tips, but other metals did not, as determined by quantitative reverse transcriptase-polymerase chain reaction. CRISPR/Cas9-generated SlFDH knockout lines were more sensitive to Al stress and formate than wild-type plants. Formate failed to induce SlFDH expression in the tomato root apex, but NAD+ accumulated in response to Al stress. Co-expression network analysis and interaction analysis between genomic DNA and transcription factors (TFs) using PlantRegMap identified seven TFs that might regulate SlFDH expression. One of these TFs, SlSTOP1, positively regulated SlFDH expression by directly binding to its promoter, as demonstrated by a dual-luciferase reporter assay and electrophoretic mobility shift assay. The Al-induced expression of SlFDH was completely abolished in Slstop1 mutants, indicating that SlSTOP1 is a core regulator of SlFDH expression under Al stress. Taken together, our findings demonstrate that SlFDH plays a role in Al tolerance and reveal the transcriptional regulatory mechanism of SlFDH expression in response to Al stress in tomato.
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Affiliation(s)
- Qiyu He
- State Key Laboratory of Plant Physiology and Biochemistry, College of Life Sciences, Zhejiang University, Hangzhou, 310058, China
| | - Jianfeng Jin
- Department of Horticulture, Zhejiang University, Zijingang Campus, 866 Yuhangtang Road, Hangzhou, 310058, China
| | - Pengfei Li
- State Key Laboratory of Plant Physiology and Biochemistry, College of Life Sciences, Zhejiang University, Hangzhou, 310058, China
| | - Huihui Zhu
- State Key Laboratory of Plant Physiology and Biochemistry, College of Life Sciences, Zhejiang University, Hangzhou, 310058, China
| | - Zhanqi Wang
- Key Laboratory of Vector Biology and Pathogen Control of Zhejiang Province, College of Life Sciences, Huzhou University, Huzhou, 313000, China
| | - Wei Fan
- College of Horticulture and Landscape, Yunnan Agricultural University, Kunming, China
| | - Jian Li Yang
- State Key Laboratory of Plant Physiology and Biochemistry, College of Life Sciences, Zhejiang University, Hangzhou, 310058, China
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Li P, Liu C, Luo Y, Shi H, Li Q, PinChu C, Li X, Yang J, Fan W. Oxalate in Plants: Metabolism, Function, Regulation, and Application. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2022; 70:16037-16049. [PMID: 36511327 DOI: 10.1021/acs.jafc.2c04787] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Characterized by strong acidity, chelating ability, and reducing ability, oxalic acid, a low molecular weight dicarboxylic organic acid, plays important roles in the regulation of plant growth and development, the response to both biotic and abiotic stresses such as plant defense and heavy metals detoxification, and food quality. The metabolism of oxalic acid has been well-studied in microorganisms, fungi, and animals but remains less understood in plants. However, excessive accumulation of oxalic acid is detrimental to plants. Therefore, the level of oxalic acid has to be precisely controlled in plant tissues. In this review, we summarize the metabolism, function, and regulation of oxalic acid in plants, and we discuss solutions such as agricultural practices and plant biotechnology to manipulate oxalic acid metabolism to regulate plant responses to both external stimuli and internal developmental cues.
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Affiliation(s)
- Pengfei Li
- State Key Laboratory of Plant Physiology and Biochemistry, Institute of Plant Biology, College of Life Sciences, Zhejiang University, Hangzhou 310058, China
| | - Chunlan Liu
- College of Resources and Environment, Yunnan Agricultural University, Kunming, 650201, China
| | - Yu Luo
- College of Food Science and Technology, Yunnan Agricultural University, Kunming, 650201, China
| | - Huineng Shi
- College of Resources and Environment, Yunnan Agricultural University, Kunming, 650201, China
| | - Qi Li
- College of Resources and Environment, Yunnan Agricultural University, Kunming, 650201, China
| | - Cier PinChu
- College of Resources and Environment, Yunnan Agricultural University, Kunming, 650201, China
| | - Xuejiao Li
- College of Landscape and Horticulture, Yunnan Agricultural University, Kunming 650201, China
| | - Jianli Yang
- State Key Laboratory of Plant Physiology and Biochemistry, Institute of Plant Biology, College of Life Sciences, Zhejiang University, Hangzhou 310058, China
| | - Wei Fan
- College of Landscape and Horticulture, Yunnan Agricultural University, Kunming 650201, China
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Peng WX, Yue X, Chen H, Ma NL, Quan Z, Yu Q, Wei Z, Guan R, Lam SS, Rinklebe J, Zhang D, Zhang B, Bolan N, Kirkham MB, Sonne C. A review of plants formaldehyde metabolism: Implications for hazardous emissions and phytoremediation. JOURNAL OF HAZARDOUS MATERIALS 2022; 436:129304. [PMID: 35739801 DOI: 10.1016/j.jhazmat.2022.129304] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2022] [Revised: 05/20/2022] [Accepted: 06/02/2022] [Indexed: 06/15/2023]
Abstract
The wide use of hazardous formaldehyde (CH2O) in disinfections, adhesives and wood-based furniture leads to undesirable emissions to indoor environments. This is highly problematic as formaldehyde is a highly hazardous and toxic compound present in both liquid and gaseous form. The majority of gaseous and atmospheric formaldehyde derive from microbial and plant decomposition. However, plants also reversibly absorb formaldehyde released from for example indoor structural materials in such as furniture, thus offering beneficial phytoremediation properties. Here we provide the first comprehensive review of plant formaldehyde metabolism, physiology and remediation focusing on release and absorption including species-specific differences for maintaining indoor environmental air quality standards. Phytoremediation depends on rhizosphere, temperature, humidity and season and future indoor formaldehyde remediation therefore need to take these biological factors into account including the balance between emission and phytoremediation. This would pave the road for remediation of formaldehyde air pollution and improve planetary health through several of the UN Sustainable Development Goals.
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Affiliation(s)
- Wan-Xi Peng
- Henan Province Engineering Research Center for Biomass Value-added Products, Forestry College, Henan Agricultural University, Zhengzhou 450002, People's Republic of China
| | - Xiaochen Yue
- Henan Province Engineering Research Center for Biomass Value-added Products, Forestry College, Henan Agricultural University, Zhengzhou 450002, People's Republic of China
| | - Huiling Chen
- Henan Province Engineering Research Center for Biomass Value-added Products, Forestry College, Henan Agricultural University, Zhengzhou 450002, People's Republic of China
| | - Nyuk Ling Ma
- Faculty of Science & Marine Environment, Universiti Malaysia Terengganu, 21030 Kuala Nerus, Terengganu, Malaysia
| | - Zhou Quan
- Henan Province Engineering Research Center for Biomass Value-added Products, Forestry College, Henan Agricultural University, Zhengzhou 450002, People's Republic of China
| | - Qing Yu
- Henan Province Engineering Research Center for Biomass Value-added Products, Forestry College, Henan Agricultural University, Zhengzhou 450002, People's Republic of China
| | - Zihan Wei
- Henan Province Engineering Research Center for Biomass Value-added Products, Forestry College, Henan Agricultural University, Zhengzhou 450002, People's Republic of China
| | - Ruirui Guan
- Henan Province Engineering Research Center for Biomass Value-added Products, Forestry College, Henan Agricultural University, Zhengzhou 450002, People's Republic of China
| | - Su Shiung Lam
- Henan Province Engineering Research Center for Biomass Value-added Products, Forestry College, Henan Agricultural University, Zhengzhou 450002, People's Republic of China; Pyrolysis Technology Research Group, Higher Institution Centre of Excellence (HICoE), Institute of Tropical Aquaculture and Fisheries (AKUATROP), Universiti Malaysia Terengganu, 21030 Kuala Nerus, Terengganu, Malaysia; Sustainability Cluster, School of Engineering, University of Petroleum & Energy Studies, Dehradun, Uttarakhand 248007, India.
| | - Jörg Rinklebe
- University of Wuppertal, School of Architecture and Civil Engineering, Institute of Foundation Engineering, Water, and Waste-Management, Soil, and Groundwater-Management, Pauluskirchstraße 7, 42285 Wuppertal, Germany; International Research Centre of Nanotechnology for Himalayan Sustainability (IRCNHS), Shoolini University, Solan 173212, Himachal Pradesh, India
| | - Dangquan Zhang
- Henan Province Engineering Research Center for Biomass Value-added Products, Forestry College, Henan Agricultural University, Zhengzhou 450002, People's Republic of China
| | - Baohong Zhang
- Department of Biology, East Carolina University, Greenville, NC 27858, USA
| | - Nanthi Bolan
- UWA School of Agriculture and Environment, The UWA Institute of Agriculture, M079, Perth WA 6009, Australia; The UWA Institute of Agriculture, The University of Western Australia, Perth, WA 6001, Australia
| | - M B Kirkham
- Department of Agronomy, Kansas State University, Manhattan, KS, USA
| | - Christian Sonne
- Henan Province Engineering Research Center for Biomass Value-added Products, Forestry College, Henan Agricultural University, Zhengzhou 450002, People's Republic of China; Aarhus University, Department of Bioscience, Arctic Research Centre (ARC), Frederiksborgvej 399, PO Box 358, DK-4000 Roskilde, Denmark; Sustainability Cluster, School of Engineering, University of Petroleum & Energy Studies, Dehradun, Uttarakhand 248007, India.
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Lee S, Vemanna RS, Oh S, Rojas CM, Oh Y, Kaundal A, Kwon T, Lee HK, Senthil-Kumar M, Mysore KS. Functional role of formate dehydrogenase 1 (FDH1) for host and nonhost disease resistance against bacterial pathogens. PLoS One 2022; 17:e0264917. [PMID: 35594245 PMCID: PMC9122214 DOI: 10.1371/journal.pone.0264917] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2021] [Accepted: 02/21/2022] [Indexed: 11/24/2022] Open
Abstract
Nonhost disease resistance is the most common type of plant defense mechanism against potential pathogens. In the present study, the metabolic enzyme formate dehydrogenase 1 (FDH1) was identified to associate with nonhost disease resistance in Nicotiana benthamiana and Arabidopsis thaliana. In Arabidopsis, AtFDH1 was highly upregulated in response to both host and nonhost bacterial pathogens. The Atfdh1 mutants were compromised in nonhost resistance, basal resistance, and gene-for-gene resistance. The expression patterns of salicylic acid (SA) and jasmonic acid (JA) marker genes after pathogen infections in Atfdh1 mutant indicated that both SA and JA are involved in the FDH1-mediated plant defense response to both host and nonhost bacterial pathogens. Previous studies reported that FDH1 localizes to mitochondria, or both mitochondria and chloroplasts. Our results showed that the AtFDH1 mainly localized to mitochondria, and the expression level of FDH1 was drastically increased upon infection with host or nonhost pathogens. Furthermore, we identified the potential co-localization of mitochondria expressing FDH1 with chloroplasts after the infection with nonhost pathogens in Arabidopsis. This finding suggests the possible role of FDH1 in mitochondria and chloroplasts during defense responses against bacterial pathogens in plants.
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Affiliation(s)
- Seonghee Lee
- Noble Research Institute, LLC, Ardmore, OK, United States of America
- Gulf Coast Research and Education Center, Institute of Food and Agricultural Science, University of Florida, Wimauma, FL, United States of America
| | - Ramu S. Vemanna
- Noble Research Institute, LLC, Ardmore, OK, United States of America
| | - Sunhee Oh
- Noble Research Institute, LLC, Ardmore, OK, United States of America
| | | | - Youngjae Oh
- Gulf Coast Research and Education Center, Institute of Food and Agricultural Science, University of Florida, Wimauma, FL, United States of America
| | - Amita Kaundal
- Noble Research Institute, LLC, Ardmore, OK, United States of America
| | - Taegun Kwon
- Noble Research Institute, LLC, Ardmore, OK, United States of America
| | - Hee-Kyung Lee
- Noble Research Institute, LLC, Ardmore, OK, United States of America
| | | | - Kirankumar S. Mysore
- Noble Research Institute, LLC, Ardmore, OK, United States of America
- Institute for Agricultural Biosciences, Oklahoma State University, Ardmore, OK, United States of America
- Department of Biochemistry and Molecular Biology, Oklahoma State University, Stillwater, OK, United States of America
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Zhao X, Zeng Z, Cao W, Khan D, Ikram M, Yang K, Chen L, Li K. Co-overexpression of AtSHMT1 and AtFDH induces sugar synthesis and enhances the role of original pathways during formaldehyde metabolism in tobacco. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2021; 305:110829. [PMID: 33691963 DOI: 10.1016/j.plantsci.2021.110829] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2020] [Revised: 01/13/2021] [Accepted: 01/17/2021] [Indexed: 06/12/2023]
Abstract
Serine hydroxymethyltransferase 1 (SHMT1) is a key enzyme in the photorespiration pathway in higher plants. Our previous study showed that AtSHMT1 controls the assimilation of HCHO to sugars in Arabidopsis. The expression of SHMT1 was induced in Arabidopsis but was inhibited in tobacco under HCHO stress. To investigate whether the function of AtSHMT1 in the HCHO assimilation could be exerted in tobacco, AtSHMT1 was overexpressed alone (S5) or co-overexpressed (SF6) with Arabidopsis formate dehydrogenase (AtFDH) in leaves using a light-inducible promoter in this study. 13C NMR analyses showed that the 13C-metabolic flux from H13CHO was introduced to sugar synthesis in SF6 leaves but not in S5 leaves. The increase in the production of metabolites via the original pathways was particularly greater in SF6 leaves than in S5 leaves, suggesting that co-overexpression of AtSHMT1 and AtFDH is more effective than overexpression of AtSHMT1 alone in the enhancement of HCHO metabolism in tobacco leaves. Consequently, the increase in HCHO uptake and resistance was greater in SF6 leaves than in S5 leaves. The mechanism underlying the role of overexpressed AtSHMT1 and AtFDH was discussed based on changes in photosynthetic parameters, chlorophyll content, antioxidant enzyme activity and the oxidative level in leaves.
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Affiliation(s)
- Xing Zhao
- Faculty of Life Science and Biotechnology, Kunming University of Science and Technology, Chenggong, 650500, Kunming, China
| | - Zhidong Zeng
- Faculty of Life Science and Biotechnology, Kunming University of Science and Technology, Chenggong, 650500, Kunming, China
| | - Wenjia Cao
- Faculty of Life Science and Biotechnology, Kunming University of Science and Technology, Chenggong, 650500, Kunming, China
| | - Dawood Khan
- Faculty of Life Science and Biotechnology, Kunming University of Science and Technology, Chenggong, 650500, Kunming, China
| | - Muhammad Ikram
- Faculty of Life Science and Biotechnology, Kunming University of Science and Technology, Chenggong, 650500, Kunming, China
| | - Kangbing Yang
- Faculty of Life Science and Biotechnology, Kunming University of Science and Technology, Chenggong, 650500, Kunming, China
| | - Limei Chen
- Faculty of Life Science and Biotechnology, Kunming University of Science and Technology, Chenggong, 650500, Kunming, China
| | - Kunzhi Li
- Faculty of Life Science and Biotechnology, Kunming University of Science and Technology, Chenggong, 650500, Kunming, China.
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10
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Effect of Met/Leu substitutions on the stability of NAD+-dependent formate dehydrogenases from Gossypium hirsutum. Appl Microbiol Biotechnol 2021; 105:2787-2798. [PMID: 33754169 DOI: 10.1007/s00253-021-11232-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2020] [Revised: 02/24/2021] [Accepted: 03/10/2021] [Indexed: 10/21/2022]
Abstract
NAD+-dependent formate dehydrogenases (FDHs) are extensively used in the regeneration of NAD(P)H and the reduction of CO2 to formate. In addition to their industrial importance, FDHs also play a crucial role in the maintenance of a reducing environment to combat oxidative stress in plants. Therefore, it is important to investigate the response of NAD+-dependent FDH against both temperature and H2O2, to understand the defense mechanisms, and to increase its stability under oxidative stress conditions. In the present study, we characterized the oxidative and thermal stability of NAD+-dependent FDH isolated from cotton, Gossypium hirsutum (GhFDH), by investigating the effect of Met/Leu substitutions in the positions of 225, 234, and 243. Results showed that the single mutant, M234L (0.72 s-1 mM-1), and the triple mutant, M225L/M234L/M243L (0.55 s-1 mM-1), have higher catalytic efficiency than the native enzyme. Substitution of methionine by leucine on the position of 243 increased the free energy gain by 670 J mol-1. The most remarkable results in chemical stability were seen for double and triple mutants, cumulatively. Double and triple substitution of Met to Leu (M225L/M243L and M225L/M243L/M234L) reduce the kefin by a factor of 2 (12.3×10-5 and 12.8×10-5 s-1, respectively.Key points• The closer the residue to NAD+, in which we substituted methionine to leucine, the lower the stability against H2O2 we observed.• The significant gain in the Tm value for the M243L mutant was observed as +5°C.• Residue 234 occupies a critical position for oxidation defense mechanisms. Graphical abstract (a) Methionine amino acids on the protein surface are susceptible to oxidative stress and can be converted to methionine sulfoxide by reactive oxygen derivatives (such as hydrogen peroxide). Therefore, they are critical regions in the change of protein conformation and loss of activity. (b) Replacing the amino acid methionine, which is susceptible to oxidation due to the sulfur group, with the oxidation-resistant leucine amino acid is an important strategy in increasing oxidative stability.
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Papazian S, Blande JD. Dynamics of plant responses to combinations of air pollutants. PLANT BIOLOGY (STUTTGART, GERMANY) 2020; 22 Suppl 1:68-83. [PMID: 30584692 DOI: 10.1111/plb.12953] [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: 07/05/2018] [Accepted: 12/20/2018] [Indexed: 06/09/2023]
Abstract
The focus of this review is on how plants respond to combinations of multiple air pollutants. Global pollution trends, plant physiological responses and ecological perspectives in natural and agricultural systems are all discussed. In particular, we highlight the importance of studying sequential or simultaneous exposure of plants to pollutants, rather than exposure to individual pollutants in isolation, and explore how these responses may interfere with the way plants interact with their biotic community. Air pollutants can alter the normal physiology and metabolic functioning of plants. Here we describe how the phenotypic and molecular changes in response to multiple pollutants can differ compared to those elicited by single pollutants, and how different responses have been observed between plants in the field and in controlled laboratory conditions and between trees and crop plants. From an ecological perspective, we discuss how air pollution can result in greater susceptibility to biotic stressors and in direct or indirect effects on interactions with organisms that occupy higher trophic levels. Finally, we provide an overview of the potential uses of plants to mitigate air pollution, exploring the feasibility for pollution removal via the processes of bio-accumulation and phytoremediation. We conclude by proposing some new directions for future research in the field.
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Affiliation(s)
- S Papazian
- Department of Plant Physiology, Umeå University, Umeå Plant Science Centre, Umeå, Sweden
| | - J D Blande
- Department of Environmental and Biological Sciences, University of Eastern Finland, Kuopio, Finland
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