1
|
Chen J, Tang L, Guo W, Wang D, Sun Y, Guo C. Oxalic acid secretion alleviates saline-alkali stress in alfalfa by improving photosynthetic characteristics and antioxidant activity. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2024; 208:108475. [PMID: 38430786 DOI: 10.1016/j.plaphy.2024.108475] [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: 12/07/2023] [Revised: 02/19/2024] [Accepted: 02/26/2024] [Indexed: 03/05/2024]
Abstract
Saline-alkali stress significantly affects the growth and yield of alfalfa (Medicago sativa L.). Organic acid secretion is crucial in alleviating abiotic stress-induced damage in plants. In this study, we evaluated the contents of the major organic acids secreted by the roots of tolerant (ZD) and sensitive (LYL) varieties of alfalfa under saline-alkali stress and investigated the effects of these organic acids on the growth, and physiological functions of alfalfa. Our results indicated that the oxalic acid (OA) content was the highest among the organic acids secreted from alfalfa roots under saline-alkali stress, and oxalic acid content was the most significantly different between the two varieties, ZD and LYL, compared to the contents of the other organic acids. Oxalic acid alleviated the inhibition of alfalfa growth caused by saline-alkali stress, improved photosynthetic characteristics, reduced the accumulation of reactive oxygen species, and increased the activity of antioxidant enzymes and content of osmoregulatory substances. Furthermore, oxalic acid resulted in significantly increased expression of genes involved in photosynthesis and antioxidant system in alfalfa under saline-alkali stress. This study revealed the effects of oxalic acid secreted by the root system on stress-related physiological processes, providing valuable insights into the functions of root secretions in plant saline-alkali resistance.
Collapse
Affiliation(s)
- Jiaxin Chen
- Key Laboratory of Molecular and Cytogenetics, College of Life Science and Technology, Harbin Normal University, Harbin, 150025, Heilongjiang Province, China
| | - Lu Tang
- Key Laboratory of Molecular and Cytogenetics, College of Life Science and Technology, Harbin Normal University, Harbin, 150025, Heilongjiang Province, China
| | - Weileng Guo
- Key Laboratory of Molecular and Cytogenetics, College of Life Science and Technology, Harbin Normal University, Harbin, 150025, Heilongjiang Province, China
| | - Dan Wang
- Key Laboratory of Molecular and Cytogenetics, College of Life Science and Technology, Harbin Normal University, Harbin, 150025, Heilongjiang Province, China
| | - Yugang Sun
- Key Laboratory of Molecular and Cytogenetics, College of Life Science and Technology, Harbin Normal University, Harbin, 150025, Heilongjiang Province, China
| | - Changhong Guo
- Key Laboratory of Molecular and Cytogenetics, College of Life Science and Technology, Harbin Normal University, Harbin, 150025, Heilongjiang Province, China.
| |
Collapse
|
2
|
Yu Y, Dong J, Li R, Zhao X, Zhu Z, Zhang F, Zhou K, Lin X. Sodium hydrosulfide alleviates aluminum toxicity in Brassica napus through maintaining H 2S, ROS homeostasis and enhancing aluminum exclusion. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 858:160073. [PMID: 36356731 DOI: 10.1016/j.scitotenv.2022.160073] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2022] [Revised: 10/30/2022] [Accepted: 11/04/2022] [Indexed: 06/16/2023]
Abstract
Hydrogen sulfide (H2S) is a gaseous mediator that plays versatile roles in plant growth and stress responses. However, the regulatory functions of H2S in plant responses to aluminum (Al) stress remain elusive. We observed that application of 20 μM of NaHS (H2S donor) or 0.2 mM of hypotaurine (HT, H2S scavenger) significantly mitigated the inhibition of rapeseed root growth caused by Al stress (150 μM). Exposure to Al for 6 h induced significant H2S accumulation and high levels were maintained thereafter, owing to the elevation of cysteine (83.73 %), L-cysteine desulfhydrase (LCD, 92.32 %), and cyanoalanine synthase (CAS, 11.23 %), and the inhibition of O-Acetyl-l-serine (thiol) lyase (OAS-TL, 15.13 %). Addition of HT significantly scavenged the prolonged H2S accumulation caused by Al stress. Exogenous NaHS maintained the H2S homeostasis through increasing OAS-TL activity (34.99 %) and inhibiting LCD activity (25.72 %), and cysteine level (39.53 %). Moreover, exogenous NaHS mitigated oxidative damage by enhancing antioxidant enzyme activity (SOD 26.27 %, POD 28.62 %, CAT 400.5 % and APX 92.68 %) and proline content (19.85 %). It also decreased root cell wall Al accumulation (20.52 %) by decreasing PME activity (24.64 %) and facilitating pectin methylation (16.74 %). Similar alleviative effects were observed when HT was added. These results suggest that H2S functions differential roles in Al stress response in rapeseed seedlings, depending on its local concentration and duration. Prolonged high H2S emissions might contribute to Al toxicity, while moderate exogenous H2S improves Al tolerance through controlling H2S and ROS accumulation and enhancing Al exclusion through replenishing antioxidant reservoirs and facilitating pectin methylation. It is therefore important that further study investigates how to orchestrate endogenous H2S levels and improve plant stress tolerance.
Collapse
Affiliation(s)
- Yan Yu
- School of Agronomy, Anhui Agricultural University, Hefei 230036, PR China.
| | - Jia Dong
- School of Agronomy, Anhui Agricultural University, Hefei 230036, PR China
| | - Rui Li
- School of Agronomy, Anhui Agricultural University, Hefei 230036, PR China
| | - Xue Zhao
- School of Agronomy, Anhui Agricultural University, Hefei 230036, PR China
| | - Zonghe Zhu
- School of Agronomy, Anhui Agricultural University, Hefei 230036, PR China
| | - Fugui Zhang
- School of Agronomy, Anhui Agricultural University, Hefei 230036, PR China
| | - Kejin Zhou
- School of Agronomy, Anhui Agricultural University, Hefei 230036, PR China.
| | - Xianyong Lin
- MOE Key Laboratory of Environment Remediation and Ecological Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, PR China; Key Laboratory of Subtropical Soil Science and Plant Nutrition of Zhejiang Province, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, PR China.
| |
Collapse
|
3
|
Li L, Li H, Wu L, Qi H. Sulfur dioxide improves drought tolerance through activating Ca 2+ signaling pathways in wheat seedlings. ECOTOXICOLOGY (LONDON, ENGLAND) 2022; 31:852-859. [PMID: 35538264 DOI: 10.1007/s10646-022-02547-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 04/07/2022] [Indexed: 06/14/2023]
Abstract
Sulfur dioxide (SO2) and drought are two important co-occurring abiotic stresses affecting the growth and productivity of plants. Here, we will investigate the role of Ca2+ in regulating antioxidant defense during drought or SO2/drought stress, and the effect of SO2 pretreatment on the physiological response of wheat seedlings to drought stress. The results showed that exogenous Ca2+ increased the activities of SOD, CAT and POD, and reduced the contents of H2O2 and MDA in drought-treated wheat seedlings, suggesting Ca2+ could improve drought tolerance by promoting antioxidant defense in plants. Moreover, exogenous Ca2+ up-regulated the expression of two stress-responsive transcription factor (TF) genes, ERF1 and MYB30, to cope with drought stress. Exposure of wheat seedlings to 10 mg m-3 SO2 significantly enhanced the activities of SOD, CAT and POD. The contents of H2O2 and MDA remained at control levels, showing that SO2 at this concentration led to an activation of the antioxidant defense system and did not cause oxidative damage to the seedlings. Furthermore, 10 mg m-3 SO2 pretreatment increased the expression of CCaMK and CPK10, enhanced the activities of SOD and POD, and reduced the accumulation of H2O2 and MDA in drought-treated wheat seedlings, showing a role of SO2 in protection of plants against drought stress. However, with removal of Ca2+ by spraying EGTA on the SO2-pretreated wheat seedlings, the expression of transcription factor genes and activities of antioxidant enzymes were decreased, and the contents of H2O2 and MDA enhanced to the level of drought treatment alone, suggesting a role of Ca2+ in the SO2-induced alleviation of drought stress. Together, these results indicated that exogenous Ca2+ increased defense-related gene expression and enzyme activity in response to drought stress, and that pre-exposure to appropriate levels of SO2 could improve drought tolerance through activation of Ca2+ signaling pathways in plants. This study would provide new strategy for enhancing plant resistance to environmental stress.
Collapse
Affiliation(s)
- Lihong Li
- Department of Chemistry and Chemical Engineering, JinzhongUniversity, Yuci, China
| | - Haiyan Li
- Department of Biology, Taiyuan Normal University, Yuci, China
| | - Lihua Wu
- Department of Biology, Taiyuan Normal University, Yuci, China
| | - Hongxue Qi
- Department of Chemistry and Chemical Engineering, JinzhongUniversity, Yuci, China.
| |
Collapse
|
4
|
Li ZG, Li XE, Chen HY. Sulfur Dioxide: An Emerging Signaling Molecule in Plants. FRONTIERS IN PLANT SCIENCE 2022; 13:891626. [PMID: 35615134 PMCID: PMC9125217 DOI: 10.3389/fpls.2022.891626] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Accepted: 04/25/2022] [Indexed: 05/20/2023]
Abstract
Sulfur dioxide (SO2) has long been viewed as toxic gas and air pollutant, but now is being verified as a signaling molecule in mammalian cells. SO2 can be endogenously produced and rapidly transformed into sulfur-containing compounds (e.g., hydrogen sulfide, cysteine, methionine, glutathione, glucosinolate, and phytochelatin) to maintain its homeostasis in plant cells. Exogenous application of SO2 in the form of gas or solution can trigger the expression of thousands of genes. The physiological functions of these genes are involved in the antioxidant defense, osmotic adjustment, and synthesis of stress proteins, secondary metabolites, and plant hormones, thus modulating numerous plant physiological processes. The modulated physiological processes by SO2 are implicated in seed germination, stomatal action, postharvest physiology, and plant response to environmental stresses. However, the review on the signaling role of SO2 in plants is little. In this review, the anabolism and catabolism of SO2 in plants were summarized. In addition, the signaling role of SO2 in seed germination, stomatal movement, fruit fresh-keeping, and plant response to environmental stresses (including drought, cold, heavy metal, and pathogen stresses) was discussed. Finally, the research direction of SO2 in plants is also proposed.
Collapse
Affiliation(s)
- Zhong-Guang Li
- School of Life Sciences, Yunnan Normal University, Kunming, China
- Engineering Research Center of Sustainable Development and Utilization of Biomass Energy, Ministry of Education, Kunming, China
- Key Laboratory of Biomass Energy and Environmental Biotechnology, Yunnan Normal University, Kunming, China
| | - Xiao-Er Li
- School of Life Sciences, Yunnan Normal University, Kunming, China
- Engineering Research Center of Sustainable Development and Utilization of Biomass Energy, Ministry of Education, Kunming, China
- Key Laboratory of Biomass Energy and Environmental Biotechnology, Yunnan Normal University, Kunming, China
| | - Hong-Yan Chen
- School of Life Sciences, Yunnan Normal University, Kunming, China
- Engineering Research Center of Sustainable Development and Utilization of Biomass Energy, Ministry of Education, Kunming, China
- Key Laboratory of Biomass Energy and Environmental Biotechnology, Yunnan Normal University, Kunming, China
| |
Collapse
|
5
|
Guo Z, Zhao J, Wang M, Song S, Xia Z. Sulfur dioxide promotes seed germination by modulating reactive oxygen species production in maize. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2021; 312:111027. [PMID: 34620432 DOI: 10.1016/j.plantsci.2021.111027] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2021] [Revised: 08/01/2021] [Accepted: 08/18/2021] [Indexed: 06/13/2023]
Abstract
Sulfur dioxide (SO2) is generally considered to be toxic to cells, but recent studies have shown that SO2 has positive roles in stress defense responses in plants. However, whether SO2 functions as a signaling molecule in the developmental process, especially in seed germination, is yet to be studied. Here, we present data supporting the role of SO2 in seed germination and possible molecular mechanisms. SO2 treatment significantly promoted the seed germination and seed vigor in maize. The germinating seeds treated with SO2 treatment exhibited higher reactive oxygen species (ROS) levels and NADPH oxidase activities. Furthermore, the specific NADPH oxidase inhibitor diphenyleneiodinium (DPI) strongly inhibited ROS accumulations, and SO2-promoted seed germination and vigor. Meanwhile, α-Amylase activity and transcripts in germinating seeds treated with SO2 were significantly elevated. These data have demonstrated that NADPH oxidase-dependent ROS production contributes to the induction of α-Amylase activity, thereby promoting seed germination upon SO2 exposure. SO2 might function as a signaling molecule in plant growth and development, especially in seed germination. This study might provide a theoretical foundation for the potential exploitation of hydrated SO2 in seed germination control in crop management.
Collapse
Affiliation(s)
- Ziting Guo
- College of Life Science, Henan Agricultural University, Zhengzhou, 450002, PR China
| | - Jinjin Zhao
- College of Life Science, Henan Agricultural University, Zhengzhou, 450002, PR China
| | - Meiping Wang
- Library of Henan Agricultural University, Zhengzhou, 450002, PR China
| | - Song Song
- College of Life Science, Henan Agricultural University, Zhengzhou, 450002, PR China.
| | - Zongliang Xia
- College of Life Science, Henan Agricultural University, Zhengzhou, 450002, PR China; Synergetic Innovation Center of Henan Grain Crops and State Key Laboratory of Wheat & Maize Crop Science, Zhengzhou, 450002, PR China.
| |
Collapse
|
6
|
Almutairi AM, Akkam Y, Alajmi MF, Akkam N. Effect of Air Pollution on Glutathione S-Transferase Activity and Total Antioxidant Capacity: Cross Sectional Study in Kuwait. J Health Pollut 2020; 10:200906. [PMID: 32874762 PMCID: PMC7453819 DOI: 10.5696/2156-9614-10.27.200906] [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: 10/09/2019] [Accepted: 03/16/2020] [Indexed: 06/11/2023]
Abstract
BACKGROUND Air pollution poses a significant threat to human health worldwide. Investigating potential health impacts is essential to the development of regulations and legislation to minimize health risks. OBJECTIVES The aim of the present study was to investigate the potentially hazardous effect of air pollution on the Ali Sabah Al Salem residential area in Kuwait by comparing the pollution level to a control area (Al-Qirawan) by assessing two biomarkers: erythrocyte glutathione S-transferases (e-GST) and total blood antioxidant, and then correlating the activity to pollution-related oxidative stress. METHODS The average concentrations of several airborne gases were measured at Ali Sabah Al Salem and Al-Qirawan, including ozone, carbon monoxide, nitrogen dioxide, nitrogen oxides, particulate matter less than 10 μm (PM10), sulfur dioxide, ammonia, carbon dioxide, hydrogen sulfide, methane, and non-methane hydrocarbon. A total of fifty-eight participants were sampled from two different areas and divided into two groups. The study group was composed of 40 residents exposed to polluted ambient air in the Ali Sabah Al Salem residential area. A reference group composed of 18 residents in the Al-Qairawan area living far from major pollution sources was also tested. RESULTS All measured gases were higher in concentration at Ali Sabah Al Salem compared to the Al-Qirawan area. Furthermore, PM10 and sulfur dioxide were higher than World Health Organization (WHO) guidelines. The e-GST activity was lower among participants of the Ali Sabah Al Salem residential area compared to participants living in the Al-Qairawan area. The total antioxidant capacity in whole blood of Ali Sabah Al Salem residents was significantly (p<0.0001) higher than in control subjects. CONCLUSIONS Residents in Ali Sabah Al Salem are exposed to a high level of air pollution that has a serious impact on glutathione S-transferases levels. Subsequently, regulations on pollution sources are needed to lower current health risks. Furthermore, the present study provides evidence that finger-prick blood sampling is a quick, non-invasive method suitable for screening e-GST activity and total antioxidants which may be applied for surveillance purposes. PARTICIPANT CONSENT Obtained. ETHICS APPROVAL The study was approved by the Scientific Research Committee of the Public Authority for Applied Education and Training, Kuwait. COMPETING INTERESTS The authors declare no competing financial interests.
Collapse
Affiliation(s)
- Abeer M. Almutairi
- Science Department, College of Basic Education, Public Authority for Applied Education and Training, (PAAET), Alardyia, Kuwait
| | - Yazan Akkam
- Department of Medicinal Chemistry and Pharmacognosy, Faculty of Pharmacy, Yarmouk University, Irbid, Jordan
| | - Mohammad F. Alajmi
- Department of Mathematics and Natural Sciences, College of Arts and Sciences, Gulf University for Science and Technology, Mubarak Al-Abdullah, Kuwait
| | - Nosaibah Akkam
- Department of Medicinal Chemistry and Pharmacognosy, Faculty of Pharmacy, Yarmouk University, Irbid, Jordan
| |
Collapse
|
7
|
Vera-Villalobos H, Lunario-Delgado L, Pérez-Retamal D, Román D, Leiva JC, Zamorano P, Mercado-Seguel A, Gálvez AS, Benito C, Wulff-Zottele C. Sulfate nutrition improves short-term Al 3+-stress tolerance in roots of Lolium perenne L. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2020; 148:103-113. [PMID: 31954280 DOI: 10.1016/j.plaphy.2020.01.011] [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: 08/29/2019] [Revised: 01/08/2020] [Accepted: 01/08/2020] [Indexed: 06/10/2023]
Abstract
Trivalent aluminum ions (Al3+) in acidic soils are a major constraint for crop productivity inhibiting root elongation and promoting cell death. Al3+-toxicity has adverse biochemical and physiological effects on plant root growth. Sulfur is an essential macronutrient assimilated from the soil in the form of sulfate. However, the implication of sulfate nutritional status in the modulation of short-term Al3+-tolerance mechanisms in plant roots has not been previously reported. Here, we evaluated the effects of increased sulfate supply on short-term Al3+-toxicity in roots of Lolium perenne, measuring Al, Ca, Mg and S uptake, lipid peroxidation, total SOD activity, and transcriptional levels of Cu/Zn and Fe-SOD genes. First, the nitrogen sulfur ratio (N/S) in the TF nutrient solutions used in this study were computed to confirm that L. perenne plants were grown in sulfate deficiency (120 μM), optimal supply (240 μM), or overdoses conditions (360 μM), without affecting dry root biomass. Sulfate supplementation (>240 μM, and N/S ratio < 16) played a significant protection to Al3+-stress that prevents morphological changes in root tips, inhibits lipid peroxidation and differentially up-regulates total SOD activity, due changes in SOD gene expression. The results support the importance of sulfate nutritional status, on plant tissue homeostasis, enhancing the physiological tolerance mechanisms modulating lipid peroxidation damage induced by short-term Al3+-toxicity.
Collapse
Affiliation(s)
- Hernán Vera-Villalobos
- Programa de Doctorado en Ciencias Biológicas, Facultad de Ciencias de la Salud, Universidad de Antofagasta, Antofagasta, Chile.
| | - Lizzeth Lunario-Delgado
- Programa de Magister en Biotecnología, Departamento de Biotecnología, Facultad de Ciencias del Mar y Recursos Biológicos, Universidad de Antofagasta, Antofagasta, Chile.
| | - Diana Pérez-Retamal
- Carrera de Bioquímica, Facultad de Ciencias de la Salud, Universidad de Antofagasta, Antofagasta, Chile.
| | - Domingo Román
- Departamento de Química, Universidad de Antofagasta, Antofagasta, Chile.
| | - Juan Carlos Leiva
- Programa de Doctorado en Ciencias Biológicas, Facultad de Ciencias de la Salud, Universidad de Antofagasta, Antofagasta, Chile.
| | - Pedro Zamorano
- Departamento Biomédico, Facultad de Ciencias de la Salud, Universidad de Antofagasta, Antofagasta, Chile; Instituto Antofagasta, Universidad de Antofagasta, Antofagasta, Chile.
| | - Ana Mercado-Seguel
- Departamento Biotecnología, Facultad de Ciencias del Mar y Recursos Biológicos, Universidad de Antofagasta, Antofagasta, Chile.
| | - Anita S Gálvez
- Departamento Biomédico, Facultad de Ciencias de la Salud, Universidad de Antofagasta, Antofagasta, Chile.
| | - Cesar Benito
- Departamento de Genética, Fisiología y Microbiología, Universidad Complutense de Madrid, Madrid, Spain.
| | - Cristián Wulff-Zottele
- Departamento Biomédico, Facultad de Ciencias de la Salud, Universidad de Antofagasta, Antofagasta, Chile.
| |
Collapse
|
8
|
Sáenz-de la O D, Cedillo-Jimenez CA, García-Ortega LF, Martínez-Reséndiz M, Arné-Robles D, Cruz-Hernandez A, Guevara-Gonzalez RG. Response of transgenic tobacco overexpressing the CchGLP gene to cadmium and aluminium: phenotypic and microRNAs expression changes. PHYSIOLOGY AND MOLECULAR BIOLOGY OF PLANTS : AN INTERNATIONAL JOURNAL OF FUNCTIONAL PLANT BIOLOGY 2020; 26:3-13. [PMID: 32158116 PMCID: PMC7036401 DOI: 10.1007/s12298-019-00716-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2019] [Revised: 09/10/2019] [Accepted: 09/20/2019] [Indexed: 05/24/2023]
Abstract
Transgenic tobacco (N. tabacum cv. Xanthi nc) expressing Capsicum chinense CchGLP gene that encodes an Mn-SOD, constitutively produces hydrogen peroxide that increase endogenous ROS levels. Previous studies using these plants against geminivirus infections as well as drought stress confirmed that CchGLP expression conferred resistance against biotic and abiotic stresses. Cadmium (Cd) and Aluminium (Al) contamination in soils are a major ecological concern since they are two of the most widespread toxic elements in terrestrial environments. Trying to explore additional possible tolerance to another stresses in these plants, the aim of this work was to analyse the response to cadmium and aluminium salts during germination and early stages of plantlet development and a differential transcriptome of microRNAs (miRNAs) expression in expressing CchGLP transgenic lines and an azygote non-CchGLP expressing line. Plants were grown in vitro with addition of CdCl2 and AlCl3 at three different concentrations: 100, 300 and 500 μM and 50, 150 and 300 μM, respectively. The results showed higher tolerance to Cd and Al salts evaluated in two CchGLP-expressing transgenic lines L8 and L26 in comparison with the azygous non-CchGLP expressing line L1. Interestingly, L8 under Al stress presented vigorous roots and development of radicular hairs in comparison with azygous control (L1). Differentially expressed miRNAs in the comparison between L8 and L1 were associated with up and down-regulation of target genes related with structural molecule activity and ribosome constituents, as well as down-regulation in proton-transporting V-type ATPase (Vacuolar ATPase or V-ATPase). Moreover, KEGG analysis of the target genes for the differentially expressed miRNAs, led to identification of genes related with metabolic pathways and biosynthesis of secondary metabolites. One possible explanation of the tolerance to Cd and Al displayed in the transgenic tobaccos evaluated, might involve the fact that several down-regulated miRNAs, were found associated with target genes expressing V-ATPase. Specifically, miR7904-5p was down regulated and related with the up-regulation of one V-ATPase. The expression levels of these genes was confirmed by qRT-PCR assays, thus suggesting that a cation transport activity driven by the V-ATPases-dependent proton motive force, might significantly contribute as one mechanism for Cd and Al detoxification by vacuolar compartmentation in these transgenic tobacco plants.
Collapse
Affiliation(s)
- Diana Sáenz-de la O
- Biosystems Engineering Group, School of Engineering, Autonomous University of Queretaro, 76010 Querétaro, Mexico
| | | | - Luis F. García-Ortega
- Present Address: Departamento de Ingeniería Genética, Centro de Investigación y de Estudios Avanzados del IPN (CINVESTAV), 36821 Irapuato, Guanajuato, Mexico
| | - Mariela Martínez-Reséndiz
- Biosystems Engineering Group, School of Engineering, Autonomous University of Queretaro, 76010 Querétaro, Mexico
| | - Diego Arné-Robles
- Biosystems Engineering Group, School of Engineering, Autonomous University of Queretaro, 76010 Querétaro, Mexico
| | | | | |
Collapse
|
9
|
Han Y, Yang H, Wu M, Yi H. Enhanced drought tolerance of foxtail millet seedlings by sulfur dioxide fumigation. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2019; 178:9-16. [PMID: 30980964 DOI: 10.1016/j.ecoenv.2019.04.006] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Revised: 04/01/2019] [Accepted: 04/02/2019] [Indexed: 05/22/2023]
Abstract
Recently, sulfur dioxide (SO2) has been considered to be a beneficial bio-regulator in animals. However, the positive roles of SO2 in plant adaptation to drought stress are still unclear. In this study, we investigated the physiological and molecular changes that are induced by SO2 fumigation to improve the drought tolerance of foxtail millet seedlings. The relative water content in the leaves of drought-stressed seedlings was significantly improved by pre-exposure to 30 mg/m3 SO2. These responses might be related to decreased stomatal apertures and a reduced leaf transpiration rate, which were induced by SO2 under drought conditions. In addition, the SO2 pretreatment markedly enhanced proline accumulation in the leaves of drought-stressed seedlings, which was supported by increased Δ1-pyrroline-5-carboxylate synthetase (P5CS) activity, decreased proline dehydrogenase (ProDH) activity, and the corresponding transcripts. Moreover, the SO2 application upregulated the enzyme activity of catalase (CAT) and peroxidase (POD) in the leaves of drought-stressed plants, as well as their transcripts, which contributed to the scavenging of hydrogen peroxide (H2O2) and alleviated drought-induced oxidative damage, as indicated by the decreased malondialdehyde (MDA) level in SO2-pretreated plants. Together, these results indicate that the application of SO2 might enhance drought tolerance by reducing stomatal apertures, increasing proline accumulation, and promoting antioxidant defence in foxtail millet seedlings. This study presents new insight into the beneficial roles of SO2 in plant responses to drought stress.
Collapse
Affiliation(s)
- Yansha Han
- School of Life Science, Shanxi University, Taiyuan, 030006, Shanxi Province, China
| | - Hao Yang
- School of Life Science, Shanxi University, Taiyuan, 030006, Shanxi Province, China
| | - Mengyang Wu
- School of Life Science, Shanxi University, Taiyuan, 030006, Shanxi Province, China
| | - Huilan Yi
- School of Life Science, Shanxi University, Taiyuan, 030006, Shanxi Province, China.
| |
Collapse
|
10
|
Han Y, Wu M, Hao L, Yi H. Sulfur dioxide derivatives alleviate cadmium toxicity by enhancing antioxidant defence and reducing Cd 2+ uptake and translocation in foxtail millet seedlings. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2018; 157:207-215. [PMID: 29625394 DOI: 10.1016/j.ecoenv.2018.03.084] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2017] [Revised: 03/27/2018] [Accepted: 03/28/2018] [Indexed: 06/08/2023]
Abstract
Sulfur dioxide (SO2) was recently proposed as a novel bio-regulator in mammals. However, the possible advantageous effects of SO2 in plant adaptation to heavy metal-contaminated environments are largely unknown. In the present study, using Na2SO3/NaHSO3 derivatives as SO2 donors, we investigated the possible roles and regulation mechanisms of SO2 in alleviating Cd2+ toxicity in foxtail millet seedlings. Exogenous SO2 derivatives (0.5 mM) application significantly reduced the seedling growth inhibition caused by Cd2+ stress. Cd2+-induced oxidative damage was also alleviated by SO2 derivatives, which was supported by the decreased malondialdehyde (MDA) level in the leaves of seedlings pretreated with SO2 derivatives. These responses were related to the enhanced activities of representative antioxidant enzymes, including catalase and superoxide dismutase, as well as the up-regulation of ascorbate-glutathione cycle, which contributed to the scavenging of Cd2+-elicited O2•- and H2O2 within the leaves of foxtail millet seedlings. Also, SO2 derivative application promoted sulfur assimilation and increased the content of glutathione and phytochelatins, which may help to enhance Cd2+ detoxification capacity in foxtail millet seedlings. Moreover, application of SO2 derivatives caused down-regulation of the transcript expression levels of several genes involved in Cd2+ uptake and translocation, such as NRAMP1, NRAMP6, IRT1, IRT2, HMA2, and HMA4, thus resulting in reduced Cd2+ accumulation in the shoots and roots of Cd2+-stressed seedlings. Collectively, these results suggest that exogenous SO2 derivative application can alleviate oxidative damage and restrict Cd2+ buildup, thereby reducing Cd2+-induced growth inhibition in foxtail millet seedlings upon Cd2+ exposure. This novel finding indicates that the usage of SO2 derivatives may be an effective approach for enhancing Cd2+ tolerance in foxtail millet and other crops.
Collapse
Affiliation(s)
- Yansha Han
- School of Life Science, Shanxi University, Taiyuan 030006, Shanxi Province, China
| | - Mengyang Wu
- School of Life Science, Shanxi University, Taiyuan 030006, Shanxi Province, China
| | - Lihong Hao
- School of Life Science, Shanxi University, Taiyuan 030006, Shanxi Province, China
| | - Huilan Yi
- School of Life Science, Shanxi University, Taiyuan 030006, Shanxi Province, China.
| |
Collapse
|
11
|
Guo P, Li Q, Qi YP, Yang LT, Ye X, Chen HH, Chen LS. Sulfur-Mediated-Alleviation of Aluminum-Toxicity in Citrus grandis Seedlings. Int J Mol Sci 2017; 18:E2570. [PMID: 29207499 PMCID: PMC5751173 DOI: 10.3390/ijms18122570] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2017] [Revised: 11/25/2017] [Accepted: 11/26/2017] [Indexed: 12/23/2022] Open
Abstract
Limited data are available on the sulfur (S)-mediated-alleviation of aluminum (Al)-toxicity in higher plants. Citrus grandis seedlings were irrigated for 18 weeks with 0.5 mM MgSO₄ or 0.5 mM MgSO₄ + 0.5 mM Na₂SO₄, and 0 (-Al) or 1 mM AlCl₃·6H₂O (+Al, Al-toxicity). Under Al-toxicity, S decreased the level of Al in leaves; increased the relative water content (RWC) of roots and leaves, the contents of phosphorus (P), calcium (Ca) and magnesium (Mg) per plant, the dry weights (DW) of roots and shoots, the ratios of root DW/shoot DW, and the Al-induced secretion of citrate from root; and alleviated the Al-induced inhibition of photosynthesis via mitigating the Al-induced decrease of electron transport capacity resulting from the impaired photosynthetic electron transport chain. In addition to decreasing the Al-stimulated H₂O₂ production, the S-induced upregulation of both S metabolism-related enzymes and antioxidant enzymes also contributed to the S-mediated-alleviation of oxidative damage in Al-treated roots and leaves. Decreased transport of Al from roots to shoots and relatively little accumulation of Al in leaves, and increased leaf and root RWC and P, Ca, and Mg contents per plant might also play a role in the S-mediated-alleviation of Al-toxicity.
Collapse
Affiliation(s)
- Peng Guo
- Institute of Plant Nutritional Physiology and Molecular Biology, College of Resources and Environment, Fujian Agriculture and Forestry University (FAFU), Fuzhou 350002, China.
| | - Qiang Li
- Institute of Plant Nutritional Physiology and Molecular Biology, College of Resources and Environment, Fujian Agriculture and Forestry University (FAFU), Fuzhou 350002, China.
| | - Yi-Ping Qi
- Institute of Materia Medica, Fujian Academy of Medical Sciences, Fuzhou 350002, China.
| | - Lin-Tong Yang
- Institute of Plant Nutritional Physiology and Molecular Biology, College of Resources and Environment, Fujian Agriculture and Forestry University (FAFU), Fuzhou 350002, China.
| | - Xin Ye
- Institute of Plant Nutritional Physiology and Molecular Biology, College of Resources and Environment, Fujian Agriculture and Forestry University (FAFU), Fuzhou 350002, China.
| | - Huan-Huan Chen
- Institute of Plant Nutritional Physiology and Molecular Biology, College of Resources and Environment, Fujian Agriculture and Forestry University (FAFU), Fuzhou 350002, China.
| | - Li-Song Chen
- Institute of Plant Nutritional Physiology and Molecular Biology, College of Resources and Environment, Fujian Agriculture and Forestry University (FAFU), Fuzhou 350002, China.
- Fujian Provincial Key Laboratory of Soil Environmental Health and Regulation, College of Resources and Environment, FAFU, Fuzhou 350002, China.
- The Higher Education Key Laboratory of Fujian Province for Soil Ecosystem Health and Regulation, College of Resources and Environment, FAFU, Fuzhou 350002, China.
| |
Collapse
|
12
|
Wang SS, Zhang YX, Yang F, Huang ZQ, Tang J, Hu KD, Zhang H. Sulfur dioxide alleviates programmed cell death in barley aleurone by acting as an antioxidant. PLoS One 2017; 12:e0188289. [PMID: 29155872 PMCID: PMC5695815 DOI: 10.1371/journal.pone.0188289] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2016] [Accepted: 11/03/2017] [Indexed: 11/19/2022] Open
Abstract
Sulfur dioxide (SO2), a gaseous signaling molecule in animal cells, has recently been found to play a physiological role in plants. Here we studied the role of SO2 in gibberellic acid (GA3)-induced programmed cell death (PCD) in barley (Hordeum vulgare L.) aleurone layers. The application of the SO2 donor (NaHSO3/Na2SO3, 1:3 M/M) effectively alleviated PCD in barley aleurone layers in a dose-dependent manner with an optimal concentration of 50 μM. Further investigations showed that SO2 reduced the accumulation of hydrogen peroxide (H2O2), superoxide anion (⋅O2-) and malondialdehyde (MDA) in aleurone layers. Moreover, the activities of antioxidant enzymes such as superoxide dismutase (SOD), catalase (CAT), ascorbate peroxidase (APX), glutathione reductase (GR) and guaiacol peroxidase (POD) were enhanced by SO2 donor treatment. Meanwhile, lipoxygenase (LOX) activity was attenuated by SO2 donor treatment. Furthermore, an induction of endogenous H2S and NO were also observed in SO2-treated aleurone layers, suggesting interactions of SO2 with other well-known signaling molecules. Taken together, we show that SO2 negatively regulated PCD by acting as an antioxidant to scavenge excessive reactive oxygen species (ROS) generated during PCD.
Collapse
Affiliation(s)
- Sha-Sha Wang
- School of Food Science and Engineering, Hefei University of Technology, Hefei, China
| | - Ying-Xin Zhang
- School of Food Science and Engineering, Hefei University of Technology, Hefei, China
| | - Feng Yang
- Xuzhou Institute of Agricultural Sciences of the Xuhuai District of Jiangsu Province, Xuzhou, China
| | - Zhong-Qin Huang
- Xuzhou Institute of Agricultural Sciences of the Xuhuai District of Jiangsu Province, Xuzhou, China
| | - Jun Tang
- Xuzhou Institute of Agricultural Sciences of the Xuhuai District of Jiangsu Province, Xuzhou, China
| | - Kang-Di Hu
- School of Food Science and Engineering, Hefei University of Technology, Hefei, China
| | - Hua Zhang
- School of Food Science and Engineering, Hefei University of Technology, Hefei, China
| |
Collapse
|
13
|
Gasotransmitters in Gametogenesis and Early Development: Holy Trinity for Assisted Reproductive Technology-A Review. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2016; 2016:1730750. [PMID: 27579148 PMCID: PMC4992752 DOI: 10.1155/2016/1730750] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/29/2016] [Accepted: 07/03/2016] [Indexed: 11/23/2022]
Abstract
Creation of both gametes, sperm and oocyte, and their fusion during fertilization are essential step for beginning of life. Although molecular mechanisms regulating gametogenesis, fertilization, and early embryonic development are still subjected to intensive study, a lot of phenomena remain unclear. Based on our best knowledge and own results, we consider gasotransmitters to be essential for various signalisation in oocytes and embryos. In accordance with nitric oxide (NO) and hydrogen sulfide (H2S) physiological necessity, their involvement during oocyte maturation and regulative role in fertilization followed by embryonic development have been described. During these processes, NO- and H2S-derived posttranslational modifications represent the main mode of their regulative effect. While NO represent the most understood gasotransmitter and H2S is still intensively studied gasotransmitter, appreciation of carbon monoxide (CO) role in reproduction is still missing. Overall understanding of gasotransmitters including their interaction is promising for reproductive medicine and assisted reproductive technologies (ART), because these approaches contend with failure of in vitro assisted reproduction.
Collapse
|
14
|
Preconditioning is hormesis part I: Documentation, dose-response features and mechanistic foundations. Pharmacol Res 2016; 110:242-264. [DOI: 10.1016/j.phrs.2015.12.021] [Citation(s) in RCA: 113] [Impact Index Per Article: 14.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/23/2015] [Revised: 12/18/2015] [Accepted: 12/19/2015] [Indexed: 12/16/2022]
|