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Yang X, Yun P, Zhao X, Zhang Z, Chen C, Zhou Y, Chen Y, Zhang H, Shabala S. Assessing impact of elevated CO 2 on heavy metal accumulation in crops: meta-analysis and implications for food security. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 952:175949. [PMID: 39226972 DOI: 10.1016/j.scitotenv.2024.175949] [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: 07/07/2024] [Revised: 08/27/2024] [Accepted: 08/30/2024] [Indexed: 09/05/2024]
Abstract
Human activities led to elevation in carbon dioxide (CO2) concentrations in atmosphere. While such increase per se may be beneficial for the growth of some crops, it comes with a caveat of affecting crop nutritional status. Here, we present a comprehensive analysis of changes in concentration of essential (Cu, Fe, Mn, Zn, Mo, Ni) and non-essential (Ba, Cd, Cr, Hg, Pb, and Sr) heavy metals in response to elevated CO2, drawing on a meta-analysis of 1216 paired observations. The major findings are as follows: (1) Elevated CO2 leads to reduced concentrations of Cu, Fe, Mn, and Zn in crops; (2) the extent of above reduction varies among plants species and is most pronounced in cereals and then in legumes and vegetables; (3) reduction in accumulation of non-essential (toxic) metals is less pronounced, potentially leading to an unfavorable essential/non-essential metal ratio in plants; (4) the above effects will come with significant implication to human health, exacerbating effects of the "hidden hunger" caused by the lack of Fe and Zn in the human diets. The paper also analyses the mechanistic basis of nutrient acquisition (both at physiological and molecular levels) and calls for the changes in the governmental policies to increase efforts of plant breeders to create genotypes with improved nutrient use efficiency for essential micronutrients while uncoupling their transport from non-essential (toxic) heavy metals.
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Affiliation(s)
- Xunzhe Yang
- Triticeae Research Institute, Sichuan Agricultural University, Chengdu, Sichuan 611130, China; School of Agriculture and Environment, and UWA Institute of Agriculture, The University of Western Australia, Perth, WA 6009, Australia
| | - Ping Yun
- School of Biological Sciences, The University of Western Australia, Perth, WA 6009, Australia
| | - Xiaoxiang Zhao
- School of Biological Sciences, The University of Western Australia, Perth, WA 6009, Australia; Key Laboratory of Aquatic Botany and Watershed Ecology, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, China
| | - Zhe Zhang
- School of Biological Sciences, The University of Western Australia, Perth, WA 6009, Australia
| | - Chen Chen
- Triticeae Research Institute, Sichuan Agricultural University, Chengdu, Sichuan 611130, China
| | - Yonghong Zhou
- Triticeae Research Institute, Sichuan Agricultural University, Chengdu, Sichuan 611130, China
| | - Yinglong Chen
- School of Agriculture and Environment, and UWA Institute of Agriculture, The University of Western Australia, Perth, WA 6009, Australia
| | - Haiqin Zhang
- College of Grassland Science and Technology, Sichuan Agricultural University, Chengdu, Sichuan 611130, China.
| | - Sergey Shabala
- School of Biological Sciences, The University of Western Australia, Perth, WA 6009, Australia; International Research Center for Environmental Membrane Biology, Foshan University, Foshan 528000, China.
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Kumar D, Mariyam S, Gupta KJ, Thiruvengadam M, Sampatrao Ghodake G, Xing B, Seth CS. Comparative investigation on chemical and green synthesized titanium dioxide nanoparticles against chromium (VI) stress eliciting differential physiological, biochemical, and cellular attributes in Helianthus annuus L. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 930:172413. [PMID: 38631632 DOI: 10.1016/j.scitotenv.2024.172413] [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: 02/29/2024] [Accepted: 04/09/2024] [Indexed: 04/19/2024]
Abstract
Nanotechnology is a new scientific area that promotes unique concepts to comprehend the optimal mechanics of nanoparticles (NPs) in plants under heavy metal stress. The present investigation focuses on effects of synthetic and green synthesized titanium dioxide nanoparticles (TiO2 NPs and gTiO2 NPs) against Cr(VI). Green TiO2 NPs have been produced from plant leaf extract (Ricinus communis L.). Synthesis was confirmed employing an array of optical spectroscopic and electron microscopic techniques. Chromium strongly accelerated H2O2 and MDA productions by 227 % and 266 % at highest chromium concentration (60 mg/kg of soil), respectively, and also caused DNA damage, and decline in photosynthesis. Additionally, anomalies were observed in stomatal cells with gradual increment in chromium concentrations. Conversely, foliar applications of TiO2 NPs and gTiO2 NPs considerably mitigated chromium stress. Sunflower plants treated with modest amounts of green TiO2 NPs had significantly better growth index compared to chemically synthesized ones. Principal component analysis highlighted the variations among photosynthetic attributes, oxidative stress markers, and antioxidant defense systems. Notably, gTiO2 supplementation to the Cr(VI) strained plants minimized PC3 production which is a rare report so far. Conclusively, gTiO2 NPs have been identified to be promising nano-based nutrition resource for farming applications.
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Affiliation(s)
- Dharmendra Kumar
- Department of Botany, University of Delhi, New Delhi 110007, Delhi, India
| | - Safoora Mariyam
- Department of Botany, University of Delhi, New Delhi 110007, Delhi, India
| | | | - Muthu Thiruvengadam
- Department of Applied Bioscience, College of Life and Environmental Sciences, Konkuk University, Seoul 05029, Republic of Korea
| | - Gajanan Sampatrao Ghodake
- Department of Biological and Environmental Science, Dongguk University-Seoul, Ilsandong-gu, Goyang-si 10326, Gyeonggi-do, Republic of Korea
| | - Baoshan Xing
- Stockbridge School of Agriculture, University of Massachusetts, Amherst, MA 01003, USA
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Basit F, Abbas S, Zhu M, Tanwir K, El-Keblawy A, Sheteiwy MS, Raza A, Hu J, Hu W, Guan Y. Ascorbic acid and selenium nanoparticles synergistically interplay in chromium stress mitigation in rice seedlings by regulating oxidative stress indicators and antioxidant defense mechanism. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:120044-120062. [PMID: 37936030 DOI: 10.1007/s11356-023-30625-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2023] [Accepted: 10/19/2023] [Indexed: 11/09/2023]
Abstract
Ascorbic acid (AsA) and selenium nanoparticles (SeNPs) were versatile plant growth regulators, playing multiple roles in promoting plant growth under heavy metal stresses. This study aimed to evaluate the beneficial role of individual and combined effects of AsA and SeNPs on morpho-physio-biochemical traits of rice with or without chromium (Cr) amendment. The results indicated that Cr negatively affected plant biomass, gas exchange parameters, total soluble sugar, proline, relative water contents, and antioxidant-related gene expression via increasing reactive oxygen species (MDA, H2O2, O2•-) formation, resulting in plant growth reduction. The application of AsA and SeNPs, individually or in combination, decreased the uptake and translocation of Cr in rice seedlings, increased seedlings with tolerance to Cr toxicity, and significantly improved the rice seedling growth. Most notably, AsA + SeNP treatment strengthened the antioxidative defense system through ROS quenching and Cr detoxification. The results collectively suggested that the application of AsA and SeNPs alone or in combination had the potential to alleviate Cr toxicity in rice and possibly other crop species.
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Affiliation(s)
- Farwa Basit
- Hainan Research Institute, Zhejiang University, Sanya, 572025, China
- The Advanced Seed Institute, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, 310058, China
| | - Saghir Abbas
- Department of Botany, Faculty of Life Sciences, Government College University, Faisalabad, 38000, Pakistan
| | - Mengjin Zhu
- Hainan Research Institute, Zhejiang University, Sanya, 572025, China
- The Advanced Seed Institute, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, 310058, China
| | - Kashif Tanwir
- Department of Botany, Faculty of Life Sciences, Government College University, Faisalabad, 38000, Pakistan
| | - Ali El-Keblawy
- Department of Applied Biology, Faculty of Science, University of Sharjah, 27272, Sharjah, United Arab Emirates
| | - Mohamed Salah Sheteiwy
- Department of Applied Biology, Faculty of Science, University of Sharjah, 27272, Sharjah, United Arab Emirates
- Department of Agronomy, Faculty of Agriculture, Mansoura University, Mansoura, 35516, Egypt
| | - Ali Raza
- College of Agriculture, Fujian Agriculture and Forestry University, Fuzhou, 350002, China
| | - Jin Hu
- Hainan Research Institute, Zhejiang University, Sanya, 572025, China
- The Advanced Seed Institute, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, 310058, China
| | - Weimin Hu
- Hainan Research Institute, Zhejiang University, Sanya, 572025, China
- The Advanced Seed Institute, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, 310058, China
| | - Yajing Guan
- Hainan Research Institute, Zhejiang University, Sanya, 572025, China.
- The Advanced Seed Institute, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou, 310058, China.
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Madany MMY, AbdElgawad H, Galilah DA, Khalil AMA, Saleh AM. Elevated CO 2 Can Improve the Tolerance of Avena sativa to Cope with Zirconium Pollution by Enhancing ROS Homeostasis. PLANTS (BASEL, SWITZERLAND) 2023; 12:3792. [PMID: 38005689 PMCID: PMC10674191 DOI: 10.3390/plants12223792] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2023] [Revised: 09/23/2023] [Accepted: 10/16/2023] [Indexed: 11/26/2023]
Abstract
Zirconium (Zr) is one of the toxic metals that are heavily incorporated into the ecosystem due to intensive human activities. Their accumulation in the ecosystem disrupts the food chain, causing undesired alterations. Despite Zr's phytotoxicity, its impact on plant growth and redox status remains unclear, particularly if combined with elevated CO2 (eCO2). Therefore, a greenhouse pot experiment was conducted to test the hypothesis that eCO2 can alleviate the phytotoxic impact of Zr upon oat (Avena sativa) plants by enhancing their growth and redox homeostasis. A complete randomized block experimental design (CRBD) was applied to test our hypothesis. Generally, contamination with Zr strikingly diminished the biomass and photosynthetic efficiency of oat plants. Accordingly, contamination with Zr triggered remarkable oxidative damage in oat plants, with concomitant alteration in the antioxidant defense system of oat plants. Contrarily, elevated levels of CO2 (eCO2) significantly mitigated the adverse effect of Zr upon both fresh and dry weights as well as the photosynthesis of oat plants. The improved photosynthesis consequently quenched the oxidative damage caused by Zr by reducing the levels of both H2O2 and MDA. Moreover, eCO2 augmented the total antioxidant capacity with the concomitant accumulation of molecular antioxidants (e.g., polyphenols, flavonoids). In addition, eCO2 not only improved the activities of antioxidant enzymes such as peroxidase (POX), superoxide dismutase (SOD) and catalase (CAT) but also boosted the ASC/GSH metabolic pool that plays a pivotal role in regulating redox homeostasis in plant cells. In this regard, our research offers a novel perspective by delving into the previously unexplored realm of the alleviative effects of eCO2. It sheds light on how eCO2 distinctively mitigates oxidative stress induced by Zr, achieving this by orchestrating adjustments to the redox balance within oat plants.
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Affiliation(s)
- Mahmoud M. Y. Madany
- Biology Department, Faculty of Science, Taibah University, Al-Madinah Al-Munawarah 41411, Saudi Arabia
| | - Hamada AbdElgawad
- Botany and Microbiology Department, Faculty of Science, Beni-Suef University, Beni-Suef 62521, Egypt
| | - Doaa A. Galilah
- Botany Department, Faculty of Science, Mansoura University, Mansoura 35516, Egypt
| | - Ahmed M. A. Khalil
- Biology Department, Faculty of Science at Yanbu, Taibah University, King Khalid Rd., Al Amoedi, Yanbu El-Bahr 46423, Saudi Arabia
| | - Ahmed M. Saleh
- Biology Department, Faculty of Science at Yanbu, Taibah University, King Khalid Rd., Al Amoedi, Yanbu El-Bahr 46423, Saudi Arabia
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Sheteiwy MS, El-Sawah AM, Kobae Y, Basit F, Holford P, Yang H, El-Keblawy A, Abdel-Fattah GG, Wang S, Araus JL, Korany SM, Alsherif EA, AbdElgawad H. The effects of microbial fertilizers application on growth, yield and some biochemical changes in the leaves and seeds of guar (Cyamopsis tetragonoloba L.). Food Res Int 2023; 172:113122. [PMID: 37689887 DOI: 10.1016/j.foodres.2023.113122] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2023] [Revised: 06/07/2023] [Accepted: 06/09/2023] [Indexed: 09/11/2023]
Abstract
Guar (Cyamopsis tetragonoloba L.) is a summer legume that is becoming a crucial industrial crop because of its high gum and protein content. Thus far, the combined effects of arbuscular mycorrhizal fungi (AMF) and Bradyrhizobium on the yield and chemical composition of guar plants are not well studied. Therefore, the current investigation was designed to estimate the individual as well as the combined effects of AMF and Bradyrhizobium on plant growth, yield and nutritional quality of seeds and leaves of guar. AMF and/or Bradyrhizobium inoculation improved chemical composition of guar seeds and its morpho-physiological (plant height, fresh weight, dry weight, and yield production) traits. In addition to increased guar growth and yield production, the inoculation of AMF and/or Bradyrhizobium increased guar leaf and seed minerals, fiber, lipids, crude protein and ash contents. At primary metabolites, there were increases in sugar levels including raffinose stachyose, verbascose and galactomannan. These increases in sugar provided a route for organic acids, amino acids and fatty acids production. Interestingly, there was an increase in essential amino acids and unsaturated fatty acids. At the bioactive secondary metabolite levels, biofertilizers improved phenols and flavonoids levels and anthocyanin and polyamines biosynthesis. In line with these increases, precursors of anthocyanin (phenylalanine, p-coumaric acid, and cinnamic acid) and the levels of polyamines (diaminopropane, putrescine, cadaverine, spermidine, spermine, and agmatine) were increased. Overall, for the first time, our study shed the light on how AMF and Bradyrhizobium improved guar yield and metabolism. Our findings suggested that the combined inoculation of AMF and Bradyrhizobium is an innovative approach to improve guar growth, yield production and yield quality.
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Affiliation(s)
- Mohamed S Sheteiwy
- Department of Agronomy, Faculty of Agriculture, Mansoura University, Mansoura 35516, Egypt; Department of Applied Biology, Faculty of Science, University of Sharjah, Sharjah, United Arab Emirates.
| | - Ahmed M El-Sawah
- Department of Agricultural Microbiology, Faculty of Agriculture, Mansoura University, Mansoura 35516, Egypt
| | - Yoshihiro Kobae
- Laboratory of Crop Nutrition, Department of Sustainable Agriculture, Rakuno Gakuen University, Hokkaido, Ebetsu 069-8501, Japan
| | - Farwa Basit
- Seed Science Center, The Advanced Seed Institute, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310058, China
| | - Paul Holford
- School of Science, Western Sydney University, Locked Bag 1797, NSW 2751, Penrith, Australia
| | - Haishui Yang
- College of Agriculture, Nanjing Agricultural University, Nanjing 210095, China
| | - Ali El-Keblawy
- Department of Applied Biology, Faculty of Science, University of Sharjah, Sharjah, United Arab Emirates
| | - Ghada G Abdel-Fattah
- Department of Botany, Faculty of Science, Mansoura University, Mansoura 35516, Egypt
| | - Shucai Wang
- Laboratory of Plant Molecular Genetics & Crop Gene Editing, School of Life Sciences, Linyi University, 276000 Linyi, China
| | - José Luis Araus
- Unit of Plant Physiology, Department of Plant Biology, University of Barcelona, Avda. Diagonal 643, 08028 Barcelona, Spain
| | - Shereen Magdy Korany
- Department of Biology, College of Science, Princess Nourah bint Abdulrahman University, P.O. Box 84428, Riyadh 11671, Saudi Arabia
| | - Emad A Alsherif
- Department of Botany and Microbiology, Faculty of Science, Beni-Suef University, 62521 Beni-Suef, Egypt
| | - Hamada AbdElgawad
- Department of Botany and Microbiology, Faculty of Science, Beni-Suef University, 62521 Beni-Suef, Egypt; Laboratory for Integrated Molecular Plant Physiology Research (IMPRES), Department of Biology, University of Antwerp, Antwerp, Belgium.
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Amer HEA, AbdElgawad H, Madany MMY, Khalil AMA, Saleh AM. Soil Contamination with Europium Induces Reduced Oxidative Damage in Hordeum vulgare Grown in a CO 2-Enriched Environment. PLANTS (BASEL, SWITZERLAND) 2023; 12:3159. [PMID: 37687405 PMCID: PMC10490371 DOI: 10.3390/plants12173159] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2023] [Revised: 08/18/2023] [Accepted: 08/23/2023] [Indexed: 09/10/2023]
Abstract
The extensive and uncontrolled utilization of rare earth elements, like europium (Eu), could lead to their accumulation in soils and biota. Herein, we investigated the impact of Eu on the growth, photosynthesis, and redox homeostasis in barley and how that could be affected by the future CO2 climate (eCO2). The plants were exposed to 1.09 mmol Eu3+/kg soil under either ambient CO2 (420 ppm, aCO2) or eCO2 (620 ppm). The soil application of Eu induced its accumulation in the plant shoots and caused significant reductions in biomass- and photosynthesis-related parameters, i.e., chlorophyll content, photochemical efficiency of PSII, Rubisco activity, and photosynthesis rate. Further, Eu induced oxidative stress as indicated by higher levels of H2O2 and lipid peroxidation products, and lower ASC/DHA and GSH/GSSG ratios. Interestingly, the co-application of eCO2 significantly reduced the accumulation of Eu in plant tissues. Elevated CO2 reduced the Eu-induced oxidative damage by supporting the antioxidant defense mechanisms, i.e., ROS-scavenging molecules (carotenoids, flavonoids, and polyphenols), enzymes (CAT and peroxidases), and ASC-GSH recycling enzymes (MDHAR and GR). Further, eCO2 improved the metal detoxification capacity by upregulating GST activity. Overall, these results provide the first comprehensive report for Eu-induced oxidative phytotoxicity and how this could be mitigated by eCO2.
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Affiliation(s)
- Hanaa E. A. Amer
- Botany and Microbiology Department, Faculty of Science, University of Cairo, Giza 12613, Egypt;
| | - Hamada AbdElgawad
- Integrated Molecular Plant Physiology Research, Department of Biology, University of Antwerp, B–2020 Antwerp, Belgium;
- Department of Botany and microbiology, Faculty of Science, Beni-Suef University, Beni-Suef 62511, Egypt
| | - Mahmoud M. Y. Madany
- Biology Department, Faculty of Science, Taibah University, Al-Madinah Al-Munawarah 41411, Saudi Arabia;
| | - Ahmed M. A. Khalil
- Biology Department, Faculty of Science at Yanbu, Taibah University, King Khalid Rd., Al Amoedi, Yanbu El-Bahr 46423, Saudi Arabia;
| | - Ahmed M. Saleh
- Biology Department, Faculty of Science at Yanbu, Taibah University, King Khalid Rd., Al Amoedi, Yanbu El-Bahr 46423, Saudi Arabia;
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Sheteiwy MS, Basit F, El-Keblawy A, Jośko I, Abbas S, Yang H, Korany SM, Alsherif EA, Dawood MFA, AbdElgawad H. Elevated CO 2 differentially attenuates beryllium-induced oxidative stress in oat and alfalfa. PHYSIOLOGIA PLANTARUM 2023; 175:e14036. [PMID: 37882304 DOI: 10.1111/ppl.14036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2023] [Revised: 08/20/2023] [Accepted: 09/20/2023] [Indexed: 10/27/2023]
Abstract
Elevated CO2 (eCO2 ) is one of the climate changes that may benefit plant growth under emerging soil contaminants such as heavy metals. In this regard, the morpho-physiological mechanisms underlying the mitigating impact of eCO2 on beryllium (Be) phytotoxicity are poorly known. Hence, we investigated eCO2 and Be interactive effects on the growth and metabolism of two species from different groups: cereal (oat) and legume (alfalfa). Be stress significantly reduced the growth and photosynthetic attributes in both species, but alfalfa was more susceptible to Be toxicity. Be stress induced reactive oxygen species (ROS) accumulation by increasing photorespiration, subsequently resulting in increased lipid and protein oxidation. However, the growth inhibition and oxidative stress induced by Be stress were mitigated by eCO2 . This could be explained, at least partially, by the increase in organic acids (e.g., citric acid) released into the soil, which subsequently reduced Be uptake. Additionally, eCO2 reduced cellular oxidative damage by reducing photorespiration, which was more significant in alfalfa plants. Furthermore, eCO2 improved the redox status and detoxification processes, including phytochelatins, total glutathione and metallothioneins levels, and glutathione-S-transferase activity in both species, but to a greater extend in alfalfa. In this context, eCO2 also stimulated anthocyanin biosynthesis by accumulating its precursors (phenylalanine, coumaric acid, cinnamic acid, and naringenin) and key biosynthetic enzymes (phenylalanine ammonia-lyase, cinnamate hydroxylase, and coumarate:CoA ligase) mainly in alfalfa plants. Overall, this study explored the mechanistic approach by which eCO2 alleviates the harmful effects of Be. Alfalfa was more sensitive to Be stress than oats; however, the alleviating impact of eCO2 on Be stress was more pronounced in alfalfa.
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Affiliation(s)
- Mohamed S Sheteiwy
- Department of Applied Biology, Faculty of Science, University of Sharjah, Sharjah, United Arab Emirates
- Department of Agronomy, Faculty of Agriculture, Mansoura University, Mansoura, Egypt
| | - Farwa Basit
- Department of Botany, Faculty of Life Sciences, Government College University, Faisalabad, Pakistan
| | - Ali El-Keblawy
- Department of Agronomy, Faculty of Agriculture, Mansoura University, Mansoura, Egypt
| | - Izabela Jośko
- Institute of Plant Genetics, Breeding and Biotechnology, Faculty of Agrobioengineering, University of Life Sciences, Lublin, Poland
| | - Saghir Abbas
- Department of Botany, Faculty of Life Sciences, Government College University, Faisalabad, Pakistan
| | - Haishui Yang
- College of Agriculture, Nanjing Agricultural University, Nanjing, China
| | - Shereen Magdy Korany
- Department of Biology, College of Science, Princess Nourah bint Abdulrahman University, Riyadh, Saudi Arabia
| | - Emad A Alsherif
- Botany and Microbiology Department, Faculty of Science, Beni-Suef University, Beni-Suef, Egypt
| | - Mona F A Dawood
- Botany and Microbiology Department, Faculty of Science, Assiut University, Assiut, Egypt
| | - Hamada AbdElgawad
- Botany and Microbiology Department, Faculty of Science, Assiut University, Assiut, Egypt
- Integrated Molecular Plant Physiology Research (IMPRES), Department of Biology, University of Antwerp, Antwerp, Belgium
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Gu T, Lu Y, Li F, Zeng W, Shen L, Yu R, Li J. Microbial extracellular polymeric substances alleviate cadmium toxicity in rice (Oryza sativa L.) by regulating cadmium uptake, subcellular distribution and triggering the expression of stress-related genes. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2023; 257:114958. [PMID: 37116453 DOI: 10.1016/j.ecoenv.2023.114958] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2023] [Revised: 04/11/2023] [Accepted: 04/23/2023] [Indexed: 05/08/2023]
Abstract
Cadmium (Cd) accumulation in crops causes potential risks to human health. Microbial extracellular polymeric substances (EPS) are a complex mixture of biopolymers that can bind various heavy metals. The present work examined the alleviating effects of EPS on Cd toxicity in rice and its detoxification mechanism. The 100 μM Cd stress hampered the overall plant growth and development, damaged the ultrastructures of both leaf and root cells, and caused severe lipid peroxidation in rice plants. However, applying EPS at a concentration of 100 mg/L during Cd stress resulted in increased biomass, reduced Cd accumulation and transport, and minimized the oxidative damage. EPS application also enhanced Cd retention in the shoot cell walls and root vacuoles, and actively altered the expression of genes involved in cell wall formation, antioxidant defense systems, transcription factors, and hormone metabolism. These findings provide new insights into EPS-mediated mitigation of Cd stress in plants and help us to develop strategies to improve crop yield in Cd-contaminated soils in the future.
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Affiliation(s)
- Tianyuan Gu
- School of Minerals Processing and Bioengineering, Central South University, Changsha, Hunan 410083, China; State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan, Hubei 430072, China
| | - Yongqing Lu
- School of Minerals Processing and Bioengineering, Central South University, Changsha, Hunan 410083, China
| | - Fang Li
- School of Minerals Processing and Bioengineering, Central South University, Changsha, Hunan 410083, China
| | - Weimin Zeng
- School of Minerals Processing and Bioengineering, Central South University, Changsha, Hunan 410083, China
| | - Li Shen
- School of Minerals Processing and Bioengineering, Central South University, Changsha, Hunan 410083, China
| | - Runlan Yu
- School of Minerals Processing and Bioengineering, Central South University, Changsha, Hunan 410083, China
| | - Jiaokun Li
- School of Minerals Processing and Bioengineering, Central South University, Changsha, Hunan 410083, China.
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AbdElgawad H, Mohammed AE, van Dijk JR, Beemster GTS, Alotaibi MO, Saleh AM. The impact of chromium toxicity on the yield and quality of rice grains produced under ambient and elevated levels of CO 2. FRONTIERS IN PLANT SCIENCE 2023; 14:1019859. [PMID: 36959941 PMCID: PMC10027917 DOI: 10.3389/fpls.2023.1019859] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/15/2022] [Accepted: 01/26/2023] [Indexed: 06/18/2023]
Abstract
Rice is a highly valuable crop consumed all over the world. Soil pollution, more specifically chromium (Cr), decreases rice yield and quality. Future climate CO2 (eCO2) is known to affect the growth and yield of crops as well as the quality parameters associated with human health. However, the detailed physiological and biochemical responses induced by Cr in rice grains produced under eCO2 have not been deeply studied. Cr (200 and 400 mg Cr6+/Kg soil) inhibited rice yield and photosynthesis in Sakha 106, but to less extend in Giza 181 rice cultivar. Elevated CO2 reduced Cr accumulation and, consequently, recovered the negative impact of the higher Cr dose, mainly in Sakha 106. This could be explained by improved photosynthesis which was consistent with increased carbohydrate level and metabolism (starch synthases and amylase). Moreover, these increases provided a route for the biosynthesis of organic, amino and fatty acids. At grain quality level, eCO2 differentially mitigated Cr stress-induced reductions in minerals (e.g., P, Mg and Ca), proteins (prolamin, globulin, albumin, glutelin), unsaturated fatty acids (e.g., C20:2 and C24:1) and antioxidants (phenolics and total antioxidant capacity) in both cultivars. This study provided insights into the physiological and biochemical bases of eCO2-induced grain yield and quality of Cr-stressed rice.
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Affiliation(s)
- Hamada AbdElgawad
- Integrated Molecular Plant Physiology Research, Department of Biology, University of Antwerp, Antwerp, Belgium
- Botany and Microbiology Department, Faculty of Science, Beni-Suef University, Beni-Suef, Egypt
| | - Afrah E. Mohammed
- Department of Biology, College of Science, Princess Nourah bint Abdulrahman University, Riyadh, Saudi Arabia
| | - Jesper R. van Dijk
- Integrated Molecular Plant Physiology Research, Department of Biology, University of Antwerp, Antwerp, Belgium
- Ecosystem Management, Department of Biology, University of Antwerp, Antwerp, Wilrijk, Belgium
| | - Gerrit T. S. Beemster
- Integrated Molecular Plant Physiology Research, Department of Biology, University of Antwerp, Antwerp, Belgium
| | - Modhi O. Alotaibi
- Department of Biology, College of Science, Princess Nourah bint Abdulrahman University, Riyadh, Saudi Arabia
| | - Ahmed M. Saleh
- Department of Botany and Microbiology, Faculty of Science, Cairo University, Giza, Egypt
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