1
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Shahid M, Altaf M, Ali S, Tyagi A. Isolation and assessment of the beneficial effect of exopolysaccharide-producing PGPR in Triticum aestivum (L.) plants grown under NaCl and Cd -stressed conditions. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2024; 215:108973. [PMID: 39133980 DOI: 10.1016/j.plaphy.2024.108973] [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: 11/14/2023] [Revised: 07/11/2024] [Accepted: 07/24/2024] [Indexed: 09/15/2024]
Abstract
Exopolysaccharide (EPS)-producing beneficial bacteria play a multifaceted role in improving plant growth and adaptive responses against different stressors. In this study, we isolated 25 bacterial strains from pea nodules and were further studied for their sodium chloride (NaCl) and cadmium (Cd) stress tolerance. Based on our results, Rhizobium fabae SR-22 (NCBI Accession number: MG063739.1) showed better tolerance toward salinity and Cd stress and produced a wide range of plant growth-promoting compounds. However, the amount of EPS varies during NaCl and Cd stress. It was important to note that NaCl and Cd beyond the tolerant level, affected the morphology and cellular viability of R. fabae. Interestingly, plant growth-promoting (PGP) substances (indole-3-acetic acid, ammonia, siderophore, and ACC deaminase) released by R. fabae were increased with increasing NaCl concentrations. In contrast, PGP substances were greatly decreased by increasing Cd dosages. Further, the beneficial effect of EPS-producing R. fabae in Triticum aestivum grown in soil treated with different levels of NaCl and Cd was assessed. Inoculation of R. fabae in wheat seedlings grown under higher NaCl and Cd concentrations showed improved growth compared to non-inoculated plants. R. fabae exhibited maximum effect in wheat plants grown under 2% NaCl and increased seed germination (8%), root length (13%), vigor indices (19%), root biomass (20%), chlorophyll-a (31%), total chlorophyll (27%) and carotenoid content. Additionally, R. fabae increased Cd and NaCl tolerance in wheat seedlings and improved their antioxidative responses. Conclusively, this work demonstrated that EPS-producing R. fabae showed a promising role in mitigating salinity and Cd-stress in wheat possibly by reducing salt and HM stress-induced abrasions and growth promotion via inorganic phosphate solubilization, and increased nutrient absorption. In the future, R. fabae equipped with these distinguishing characteristics may be used as effective bio-inoculants/bio-formulations in agriculture to address salinity and HM stress issues.
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Affiliation(s)
- Mohammad Shahid
- Department of Agricultural Microbiology, Faculty of Agricultural Sciences, Aligarh Muslim University, Aligarh, 202002, UP, India.
| | - Mohammad Altaf
- Department of Chemistry, College of Science, King Saud University, P.O. Box 2455, 11451, Riyadh, Saudi Arabia
| | - Sajad Ali
- Department of Biotechnology, Yeungnam University, Gyeongsan, Gyeongbuk, 38541, Republic of Korea.
| | - Anshika Tyagi
- Department of Biotechnology, Yeungnam University, Gyeongsan, Gyeongbuk, 38541, Republic of Korea
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2
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Brengi SH, Moubarak M, El-Naggar HM, Osman AR. Promoting salt tolerance, growth, and phytochemical responses in coriander (Coriandrum sativum L. cv. Balady) via eco-friendly Bacillus subtilis and cobalt. BMC PLANT BIOLOGY 2024; 24:848. [PMID: 39256685 PMCID: PMC11384715 DOI: 10.1186/s12870-024-05517-3] [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: 04/23/2024] [Accepted: 08/12/2024] [Indexed: 09/12/2024]
Abstract
In plant production, evaluation of salt stress protectants concerning their potential to improve growth and productivity under saline stress is critical. Bacillus subtilis (Bs) and cobalt (Co) have been proposed to optimize salt stress tolerance in coriander (Coriandrum sativum L. cv. Balady) plants by influencing some physiological activities. The main aim of this work is to investigate the response of (Bs) and (Co) as eco-safe salt stress protectants to resist the effect of salinity, on growth, seed, and essential oil yield, and the most important biochemical constituents of coriander produced under salt stress condition. Therefore, in a split-plot factorial experiment design in the RCBD (randomized complete block design), four levels of salinity of NaCl irrigation water (SA) were assigned to the main plots; (0.5, 1.5, 4, and 6 dS m-1); and six salt stress protectants (SP) were randomly assigned to the subplots: distilled water; 15 ppm (Co1); 30 ppm (Co2); (Bs); (Co1 + Bs); (Co2 + Bs). The study concluded that increasing SA significantly reduced coriander growth and yield by 42.6%, which could be attributed to ion toxicity, oxidative stress, or decreased vital element content. From the results, we recommend that applying Bs with Co (30 ppm) was critical for significantly improving overall growth parameters. This was determined by the significant reduction in the activity of reactive oxygen species scavenging enzymes: superoxide dismutase (SOD), catalase (CAT), and malondialdehyde (MDA) and non-enzyme: proline by 5, 11.3, 14.7, and 13.8% respectively, while increasing ascorbic acid by 8% and preserving vital nutrient levels and enhancing plant osmotic potential to buffer salt stress, seed yield per plant, and essential oil yield increased by 12.6 and 18.8% respectively. The quality of essential oil was indicated by highly significant quantities of vital biological phytochemicals such as linalool, camphor, and protein which increased by 10.3, 3.6, and 9.39% respectively. Additional research is suggested to determine the precise mechanism of action of Bs and Co's dual impact on medicinal and aromatic plant salt stress tolerance.
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Affiliation(s)
- Sary H Brengi
- Department of Horticulture, Faculty of Agriculture, Damanhour University, Damanhour, Beheira, 22516, Egypt
| | - Maneea Moubarak
- Department of Horticulture, Faculty of Agriculture, Damanhour University, Damanhour, Beheira, 22516, Egypt
| | - Hany M El-Naggar
- Department of Floriculture, Faculty of Agriculture, Alexandria University (El-Shatby), Alexandria, 21545, Egypt.
| | - Amira R Osman
- Department of Horticulture, Faculty of Agriculture, Damanhour University, Damanhour, Beheira, 22516, Egypt.
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3
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Chetverikov S, Kuzina E, Feoktistova A, Timergalin M, Rameev T, Bakaeva M, Zaitsev G, Davydychev A, Korshunova T. Mitigation of the Negative Effect of Drought and Herbicide Treatment on Growth, Yield, and Stress Markers in Bread Wheat as a Result of the Use of the Plant Growth Regulator Azolen ®. PLANTS (BASEL, SWITZERLAND) 2024; 13:2297. [PMID: 39204733 PMCID: PMC11359348 DOI: 10.3390/plants13162297] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/01/2024] [Revised: 07/28/2024] [Accepted: 08/16/2024] [Indexed: 09/04/2024]
Abstract
Most chemical pesticides, in addition to their main functions (protection against diseases, weeds, and pests), also have a noticeable inhibitory effect on target crops. In a laboratory experiment and two-year field experiments (Russia, Trans-Urals), a study was made of the effect of the biopreparation Azolen® (Azotobacter vinelandii IB-4) on plants of the Ekada 113 wheat variety under conditions of drought and stress caused by the exposure to the herbicide Chistalan (2.4-D and dicamba). The biopreparation and the herbicide were used separately and together on wheat during the tillering phase. Treatment with the biological preparation under stressful conditions had a significant effect on the hormonal balance of plants (a decrease in the amount of abscisic acid and a normalization of the balance of indolyl-3-acetic acid and cytokinins in shoots and roots of plants was noted), while the osmoprotective, antioxidant, and photosynthetic systems of plants were activated. In drought conditions, the treatment of plants with biological preparation prevented the inhibition of root growth caused by the use of the herbicide. This, in turn, improved the absorption of water by plants and ensured an increase in wheat yield (1.6 times). The results obtained give reason to believe that microbiological preparations can be used as antidotes that weaken the phytotoxic effect of herbicidal treatments, including in drought conditions.
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Affiliation(s)
| | | | | | | | | | | | - Gleb Zaitsev
- Ufa Institute of Biology, Ufa Federal Research Centre, Russian Academy of Sciences, Ufa 450054, Russia; (S.C.); (E.K.); (A.F.); (M.T.); (T.R.); (M.B.); (A.D.); (T.K.)
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4
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Alshaal T, Alharbi K, Naif E, Rashwan E, Omara AED, Hafez EM. Strengthen sunflowers resilience to cadmium in saline-alkali soil by PGPR-augmented biochar. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2024; 280:116555. [PMID: 38870735 DOI: 10.1016/j.ecoenv.2024.116555] [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: 12/13/2023] [Revised: 06/03/2024] [Accepted: 06/04/2024] [Indexed: 06/15/2024]
Abstract
In the center of the Nile Delta in Egypt, the Kitchener drain as the primary drainage discharges about 1.9 billion m3 per year of water, which comprises agricultural drainage (75 %), domestic water (23 %), and industrial water (2 %), to the Mediterranean Sea. Cadmium (Cd) stands out as a significant contaminant in this drain; therefore, this study aimed to assess the integration of biochar (0, 5, and 10 ton ha-1) and three PGPRs (PGPR-1, PGPR-2, and PGPR-3) to alleviate the negative impacts of Cd on sunflowers (Helianthus annuus L.) in saline-alkali soil. The treatment of biochar (10 ton ha-1) and PGPR-3 enhanced the soil respiration, dehydrogenase, nitrogenase, and phosphatase activities by 137 %, 129 %, 326 %, and 127 %, while it declined soil electrical conductivity and available Cd content by 31.7 % and 61.3 %. Also, it decreased Cd content in root, shoot, and seed by 55.3 %, 50.7 %, and 92.5 %, and biological concentration and translocation factors by 55 % and 5 %. It also declined the proline, lipid peroxidation, H2O2, and electrolyte leakage contents by 48 %, 94 %, 80 %, and 76 %, whereas increased the catalase, peroxidase, superoxide dismutase, and polyphenol oxidase activities by 80 %, 79 %, 61 %, and 116 %. Same treatment increased seed and oil yields increased by 76.1 % and 76.2 %. The unique aspect of this research is its investigation into the utilization of biochar in saline-alkali soil conditions, coupled with the combined application of biochar and PGPR to mitigate the adverse effects of Cd contamination on sunflower cultivation in saline-alkali soil.
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Affiliation(s)
- Tarek Alshaal
- Department of Applied Plant Biology, Institute of Crop Sciences, University of Debrecen, AGTC. 4032 Debrecen, Hungary; Soil and Water Department, Faculty of Agriculture, University of Kafrelsheikh, 33516 Kafr El-Sheikh, Egypt.
| | - Khadiga Alharbi
- Department of Biology, College of Science, Princess Nourah bint Abdulrahman University, P.O.Box 84428, Riyadh 11671, Saudi Arabia
| | - Eman Naif
- Department of Crop Science, Faculty of Agriculture, Damanhour University, El-Beheira 22511, Egypt
| | - Emadelden Rashwan
- Agronomy Department, Faculty of Agriculture, Tanta University, Tanta 31527, Egypt
| | - Alaa El-Dein Omara
- Department of Microbiology, Soils, Water Environment Research Institute, Agricultural Research Center, Giza 12112, Egypt
| | - Emad M Hafez
- Department of Agronomy, Faculty of Agriculture, Kafrelsheikh University, Kafr El-Sheikh 33516, Egypt
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5
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Aioub AAA, Fahmy MA, Ammar EE, Maher M, Ismail HA, Yue J, Zhang Q, Abdel-Wahab SIZ. Decontamination of Chlorpyrifos Residue in Soil by Using Mentha piperita (Lamiales: Lamiaceae) for Phytoremediation and Two Bacterial Strains. TOXICS 2024; 12:435. [PMID: 38922115 PMCID: PMC11209611 DOI: 10.3390/toxics12060435] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2024] [Revised: 06/09/2024] [Accepted: 06/14/2024] [Indexed: 06/27/2024]
Abstract
This study utilizes Mentha piperita (MI) for the first time to investigate the uptake and translocation of chlorpyrifos (CPF; 10 µg g-1) from soil, introducing a new approach to improve the efficacy of this technique, which includes using biosurfactants (Bacillus subtilis and Pseudomonas aeruginosa) at 107 CFU/mL to degrade CPF under greenhouse conditions. Moreover, antioxidant enzymes, including superoxide dismutase (SOD) and peroxidase (Prx), and oxidative stress due to hydrogen peroxide (H2O2) and malondialdehyde (MDA) in MI roots and leaves were evaluated under CPF stress. Our results demonstrated that amending soil with MI and B. subtilis followed by P. aeruginosa significantly reduced CPF levels in the soil (p > 0.05) and enhanced CPF concentrations in MI roots and leaves after 1, 3, 7, 10, and 14 days of the experiment. Furthermore, CPF showed its longest half-life (t1/2) in soil contaminated solely with CPF, lasting 15.36 days. Conversely, its shortest half-life occurred in soil contaminated with CPF and treated with MI along with B. subtilis, lasting 4.65 days. Soil contaminated with CPF and treated with MI and P. aeruginosa showed a half-life of 7.98 days. The half-life (t1/2) of CPF-contaminated soil with MI alone was 11.41 days. A batch equilibrium technique showed that B. subtilis is better than P. aeruginosa for eliminating CPF from soil in In vitro experiments. Notably, CPF-polluted soil treated with coadministration of MI and the tested bacteria improved the activities of SOD and Prx and reduced H2O2 and MDA compared with CPF-polluted soil treated with MI alone. Our findings demonstrated that using B. subtilis and P. aeruginosa as biosurfactants to augment phytoremediation represents a commendable strategy for enhancing the remediation of CPF contamination in affected sites while reducing the existence of harmful pesticide remnants in crop plants.
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Affiliation(s)
- Ahmed A. A. Aioub
- Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Key Laboratory of Environment Remediation and Ecological Health, Zhejiang University, Ministry of Education, Hangzhou 310058, China;
- Plant Protection Department, Faculty of Agriculture, Zagazig University, Zagazig 44511, Egypt;
| | - Mohamed A. Fahmy
- Department of Agricultural Microbiology, Faculty of Agriculture, Zagazig University, Zagazig 44511, Egypt;
| | - Esraa E. Ammar
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China;
- Plant Ecology Sector, Botany Department, Faculty of Science, Tanta University, Tanta 31527, Egypt
| | - Mohamed Maher
- Department of Biochemistry, Faculty of Agriculture, Zagazig University, Zagazig 44511, Egypt
| | - Heba A. Ismail
- Plant Protection Research Institute, Agricultural Research Center, Dokki, Giza 12618, Egypt;
| | - Jin Yue
- Anji County Agriculture and Rural Bureau, Hangzhou 313300, China
| | - Qichun Zhang
- Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Key Laboratory of Environment Remediation and Ecological Health, Zhejiang University, Ministry of Education, Hangzhou 310058, China;
| | - Sarah I. Z. Abdel-Wahab
- Plant Protection Department, Faculty of Agriculture, Zagazig University, Zagazig 44511, Egypt;
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6
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Su Y, Shi Q, Li Z, Deng H, Zhou Q, Li L, Zhao L, Yuan S, Liu Q, Chen Y. Rhodopseudomonas palustris shapes bacterial community, reduces Cd bioavailability in Cd contaminated flooding paddy soil, and improves rice performance. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 926:171824. [PMID: 38521273 DOI: 10.1016/j.scitotenv.2024.171824] [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: 01/07/2024] [Revised: 03/14/2024] [Accepted: 03/17/2024] [Indexed: 03/25/2024]
Abstract
Photosynthetic bacteria (PSB) are suitable to live and remediate cadmium (Cd) in the slightly oxygenated or anaerobic flooding paddy field. However, there is currently limited study on the inhibition of Cd accumulation in rice by PSB, and the relevant mechanisms has yet to be elucidated. In the current study, we firstly used Rhodopseudomonas palustris SC06 (a typical PSB) as research target and combined physiology, biochemistry, microbiome and metabolome to evaluate the mechanisms of remeding Cd pollution in paddy field and inhibiting Cd accumulation in rice. Microbiome analysis results revealed that intensive inoculation with R. palustris SC06 successfully survived and multiplied in flooding paddy soil, and significantly increased the relatively abundance of anaerobic bacteria including Desulfobacterota, Anaerolineaceae, Geobacteraceae, and Gemmatimonadaceae by 46.40 %, 45.00 %, 50.12 %, and 21.30 %, respectively. Simultaneously, the structure of microbial community was regulated to maintain relative stability in the rhizosphere soil of rice under Cd stress. In turn, these bacteria communities reduced bioavailable Cd and enhanced residual Cd in soil, and induced the upregulation of sugar and organic acids in the rice roots, which further inhibited Cd uptake in rice seedlings, and dramatically improved the photosynthetic efficiency in the leaves and the activities of antioxidative enzymes in the roots. Finally, Cd content of the roots, stems, leaves, and grains significantly decreased by 38.14 %, 69.10 %, 83.40 %, and 37.24 % comparing with the control, respectively. This study provides a new strategy for the remediation of Cd-contaminated flooding paddy fields and the safe production of rice.
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Affiliation(s)
- Yanqiu Su
- Key Laboratory of Land Resources Evaluation and Monitoring in Southwest (Sichuan Normal University), Ministry of Education, Chengdu 610101, China; College of Life Science, Sichuan Normal University, Chengdu 610101, China.
| | - Qiuyun Shi
- College of Life Sciences, Sichuan Agricultural University, Ya'an 625014, China
| | - Ziyuan Li
- College of Life Science, Sichuan Normal University, Chengdu 610101, China
| | - Hongmei Deng
- College of Life Science, Sichuan Normal University, Chengdu 610101, China
| | - Qian Zhou
- College of Life Science, Sichuan Normal University, Chengdu 610101, China
| | - Lihuan Li
- College of Life Science, Sichuan Normal University, Chengdu 610101, China
| | - Lanyin Zhao
- College of Life Science, Sichuan Normal University, Chengdu 610101, China
| | - Shu Yuan
- College of Resources Science and Technology, Sichuan Agricultural University, Chengdu 611130, China
| | - Qi Liu
- Guangdong Provincial Key Laboratory of New Technology in Rice Breeding, Guangzhou, Guangdong 510640, China
| | - Yanger Chen
- College of Life Sciences, Sichuan Agricultural University, Ya'an 625014, China.
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7
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Khan S, Akhtar N, Rehman SU, Shujah S, Jamil M. Iron oxide nanoparticle (Fe 3O 4 NPs) synthesized from B. subtilis reduced arsenic (as) toxicity in rice ( Oryza sativa L.) plant. INTERNATIONAL JOURNAL OF PHYTOREMEDIATION 2024; 26:1676-1682. [PMID: 38702891 DOI: 10.1080/15226514.2024.2346904] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2024]
Abstract
Arsenic (As) is one of the most important water pollutant of global concern due to its extreme hazard. In the present study, B. subtilis synthesized iron oxide nanoparticles (Fe3O4 NPs) were used for mitigation of harmful metalloid As from the aqueous solution. Initially, the arsenic removal efficiency was tested in a batch culture experiment across various concentrations (5, 10 and 15 ppm) of B. subtilis synthesized Fe3O4 NPs at different pH, time interval and agitation speed. Optimal removal efficiency of As by using B. subtilis synthesized Fe3O4 NPs was observed at pH 7, after 80 min, and with agitation at 200 rpm. Additionally, hydroponic culture experiment was designed to assess B. subtilis synthesized Fe3O4 NPs efficiency in removal of As from As-contaminated water used to irrigate rice plants. Results revealed that B. subtilis synthesized Fe3O4 NPs effectively removed As from the contiminated water and reduced its uptake by the different parts of rice plants (root, shoot and leaf). Furthermore, these B. subtilis synthesized Fe3O4 NPs also reduced the bioaccumulation and enhanced plant tolerance to As, suggesting their potential in mitigating heavy metal toxicity, especially As and promoting plant growth. Thus, this study proposes B. subtilis synthesized Fe3O4 NPs as nano-adsorbents in reducing arsenic toxicity in rice plants.
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Affiliation(s)
- Sehresh Khan
- Department of Biotechnology and Genetic Engineering, Kohat University of Science & Technology (KUST), Kohat, Pakistan
| | - Nazneen Akhtar
- Department of Biotechnology and Genetic Engineering, Kohat University of Science & Technology (KUST), Kohat, Pakistan
| | | | - Shaukat Shujah
- Department of Chemistry, Kohat University of Science & Technology (KUST), Kohat, Pakistan
| | - Muhammad Jamil
- Department of Biotechnology and Genetic Engineering, Kohat University of Science & Technology (KUST), Kohat, Pakistan
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8
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Walczak-Skierska J, Krakowska-Sieprawska A, Monedeiro F, Złoch M, Pomastowski P, Cichorek M, Olszewski J, Głowacka K, Gużewska G, Szultka-Młyńska M. Silicon's Influence on Polyphenol and Flavonoid Profiles in Pea ( Pisum sativum L.) under Cadmium Exposure in Hydroponics: A Study of Metabolomics, Extraction Efficacy, and Antimicrobial Properties of Extracts. ACS OMEGA 2024; 9:14899-14910. [PMID: 38585133 PMCID: PMC10993280 DOI: 10.1021/acsomega.3c08327] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/23/2023] [Revised: 02/29/2024] [Accepted: 03/06/2024] [Indexed: 04/09/2024]
Abstract
The current study aimed to investigate the impact of silicon (Si) supplementation in the form of Na2SiO3 on the metabolome of peas under normal conditions and following exposure to cadmium (Cd) stress. Si is known for its ability to enhance stress tolerance in various plant species, including the mitigation of heavy metal toxicity. Cd, a significant contaminant, poses risks to both human health and the environment. The study focused on analyzing the levels of bioactive compounds in different plant parts, including the shoot, root, and pod, to understand the influence of Si supplementation on their biosynthesis. Metabolomic analysis of pea samples was conducted using a targeted HPLC/MS approach, enabling the identification of 15 metabolites comprising 9 flavonoids and 6 phenolic acids. Among the detected compounds, flavonoids, such as flavon and quercetin, along with phenolic acids, including chlorogenic acid and salicylic acid, were found in significant quantities. The study compared Si supplementation at concentrations of 1 and 2 mM, as well as Cd stress conditions, to evaluate their effects on the metabolomic profile. Additionally, the study explored the extraction efficiency of three different methods: accelerated solvent extraction (ASE), supercritical fluid extraction (SFE), and maceration (MAC). The results revealed that SFE was the most efficient method for extracting polyphenolic compounds from the pea samples. Moreover, the study investigated the stability of polyphenolic compounds under different pH conditions, ranging from 4.0 to 6.0, providing insights into the influence of the pH on the extraction and stability of bioactive compounds.
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Affiliation(s)
- Justyna Walczak-Skierska
- Centre
for Modern Interdisciplinary Technologies, Nicolaus Copernicus University, Wilenska 4, Torun 87-100, Poland
| | - Aneta Krakowska-Sieprawska
- Department
of Plant Physiology, Genetics and Biotechnology, University of Warmia and Mazury in Olsztyn, Oczapowskiego 1a, Olsztyn 10-719, Poland
| | - Fernanda Monedeiro
- Centre
for Modern Interdisciplinary Technologies, Nicolaus Copernicus University, Wilenska 4, Torun 87-100, Poland
| | - Michał Złoch
- Centre
for Modern Interdisciplinary Technologies, Nicolaus Copernicus University, Wilenska 4, Torun 87-100, Poland
| | - Paweł Pomastowski
- Centre
for Modern Interdisciplinary Technologies, Nicolaus Copernicus University, Wilenska 4, Torun 87-100, Poland
| | - Mateusz Cichorek
- Department
of Plant Physiology, Genetics and Biotechnology, University of Warmia and Mazury in Olsztyn, Oczapowskiego 1a, Olsztyn 10-719, Poland
| | - Jacek Olszewski
- Experimental
Education Unit, University of Warmia and
Mazury in Olsztyn, Plac Łódzki 1, Olsztyn 10-721, Poland
| | - Katarzyna Głowacka
- Department
of Plant Physiology, Genetics and Biotechnology, University of Warmia and Mazury in Olsztyn, Oczapowskiego 1a, Olsztyn 10-719, Poland
| | - Gaja Gużewska
- Department
of Environmental Chemistry and Bioanalytics, Faculty of Chemistry, Nicolaus Copernicus University, Gagarin 7, Torun 87-100, Poland
| | - Małgorzata Szultka-Młyńska
- Department
of Environmental Chemistry and Bioanalytics, Faculty of Chemistry, Nicolaus Copernicus University, Gagarin 7, Torun 87-100, Poland
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9
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Shi B, Yang R, Tian W, Lu M, Wang X. Factors influencing cadmium accumulation in plants after inoculation with rhizobacteria: A meta-analysis. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 916:170277. [PMID: 38266722 DOI: 10.1016/j.scitotenv.2024.170277] [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: 11/18/2023] [Revised: 01/16/2024] [Accepted: 01/17/2024] [Indexed: 01/26/2024]
Abstract
Rhizobacteria have the potential to enhance phytoremediation by generating substances that stimulate plant development and influence the effectiveness of cadmium (Cd) remediation by adjusting Cd availability via metal solubilization. Furthermore, rhizobacterial inoculation affects plants' metal tolerance and uptake by controlling the expression of several metal transporters, channels, and metal chelator genes. A meta-analysis was conducted to quantitatively assess the effects of rhizobacteria on Cd accumulation in plants using 207 individual observations from 47 articles. This meta-analysis showed an average Cd concentration increase of 8.09 % in plant cells under rhizobacteria treatment. The effects of different plant-microbial interactions on the bioaccumulation of Cd in plants varied. Selecting the proper rhizobacteria-plant association is essential to affect Cd buildup in plant roots and shoots. A more extended planting period (>30 days) and a suitable soil pH (<6, 7-8) would aid in the phytoextraction of Cd from the soil. This study comprehensively and quantitatively investigated the effects of plants, rhizobacteria, soil pH, planting period, experimental sites, and plant organs on plant Cd accumulation. According to the analysis of explanatory factors, plant species, planting period, soil pH, and rhizobacteria species have a more decisive influence on Cd accumulation than other factors. The results provide information for future research on the successful remediation of soils contaminated with Cd. More investigations are required to elucidate the intricate interactions between plant roots and microorganisms.
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Affiliation(s)
- Ben Shi
- Department of Environmental Engineering and Chemistry, Luoyang Institute of Science and Technology, Luoyang 471023, China.
| | - Ruixian Yang
- Department of Environmental Engineering and Chemistry, Luoyang Institute of Science and Technology, Luoyang 471023, China
| | - Wenjie Tian
- Department of Environmental Engineering and Chemistry, Luoyang Institute of Science and Technology, Luoyang 471023, China
| | - Mingmei Lu
- Department of Environmental Engineering and Chemistry, Luoyang Institute of Science and Technology, Luoyang 471023, China
| | - Xiaoqing Wang
- Department of Environmental Engineering and Chemistry, Luoyang Institute of Science and Technology, Luoyang 471023, China
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10
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Iwuala E, Olajide O, Abiodun I, Odjegba V, Utoblo O, Ajewole T, Oluwajobi A, Uzochukwu S. Silicon ameliorates cadmium (Cd) toxicity in pearl millet by inducing antioxidant defense system. Heliyon 2024; 10:e25514. [PMID: 38333779 PMCID: PMC10850601 DOI: 10.1016/j.heliyon.2024.e25514] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2023] [Revised: 01/17/2024] [Accepted: 01/29/2024] [Indexed: 02/10/2024] Open
Abstract
Cadmium (Cd) stress is a significant environmental pollutant that can negatively impact crop yield and growth, and is a serious global issue. However, silicon (Si) has been shown to have a potential function in alleviating the effects of several abiotic stress conditions on crops, including Cd stress. This study investigated the effectiveness of applying silicon to soil as a method for reducing cadmium toxicity in pearl millet (IP14599) seedlings. Seeds of IP14599 were treated with Si + Cd element which cumulated to a combination of 9 treatments. Different Cd concentration of (0, 200, and 300 mg/kg-1) was taken and manually mixed into a sieved soil prior to planting and Si (0, 100 and 200 mg/kg-1) was selectively introduced till after attaining 12 days of seedling emergence. The physiochemical parameters of Cd stressed plants investigated includes chlorophyll, gas exchange attributes, proline, relative water contents, malondialdehyde (MDA) content and antioxidant enzymes (superoxide dismutase (SOD),catalase (CAT), ascorbate peroxidase (APX), peroxidase (POD). Our result revealed that the metal (Cd) caused serious oxidative impairment thereby reducing photosynthetic performance, increased activity of MDA and Cd content in the roots and leaves of IP14599.In addition, Si increased the growth pattern and antioxidant defense action thereby mitigating the Cd toxicity. The results revealed that at Si 200, Si significantly increased the chlorophyll, carotenoids and plant height at 122 %, 69 % and 128 % under the Cd 200 and Cd 300 mg/kg-1 treatment, respectively. The single treatment at Si100 and Si 200 decreased ROS by 29 %, and 37 % respectively and MDA decreased by 33 % and 43 % in contrast to Cd 200 and 300 treatments, respectively. However, Si200 showed significant increase in the activities of APX 97 %, SOD by 89 %, CAT 35 % and POD 86 % as compared to single Si, Cd or combine Cd + Si treatment. Also, a gradual decline in Cd level in both the leaf and root was present when exposed to high concentrations of Si at Si200 and 300 mg/kg-1. Our findings revealed that Si might significantly increase the capacity to tolerate Cd stress in crop plants. Therefore, the study revealed that Si has the potential to alleviate Cd-induced toxicity by reducing Cd assimilation and enhancing the growth attributes of IP14599 plants.
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Affiliation(s)
- Emmanuel Iwuala
- Department of Plant Science and Biotechnology, Federal University Oye Ekiti, Nigeria
| | - Olubunmi Olajide
- Department of Landscape and Horticulture, Ekiti State University, Ekiti, Nigeria
| | - Isaika Abiodun
- Department of Plant Science and Biotechnology, Federal University Oye Ekiti, Nigeria
| | - Victor Odjegba
- Department of Botany, University of Lagos, Akoka, Yaba, Lagos State, Nigeria
| | - Obaiya Utoblo
- Department of Plant Science and Biotechnology, University of Jos, Plateau State, Nigeria
| | - Tolulope Ajewole
- Department of Plant Science and Biotechnology, Federal University Oye Ekiti, Nigeria
| | - Ayoola Oluwajobi
- Department of Plant Science and Biotechnology, Federal University Oye Ekiti, Nigeria
| | - Sylvia Uzochukwu
- Department of Plant Science and Biotechnology, Federal University Oye Ekiti, Nigeria
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11
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Alsiary WA, Madany MMY, AbdElgawad H. The pleiotropic role of Salinicoccus bacteria in enhancing ROS homeostasis and detoxification metabolism in soybean and oat to cope with pollution of triclosan. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2024; 207:108327. [PMID: 38271860 DOI: 10.1016/j.plaphy.2023.108327] [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: 10/18/2023] [Accepted: 12/28/2023] [Indexed: 01/27/2024]
Abstract
Triclosan has been extensively used as a preservative in cosmetics and personal care products. However, its accumulation represents a real environmental threat. Thus, its phytotoxic impact needs more consideration. Our study was conducted to highlight the phytotoxic effect of triclosan on the growth, ROS homeostasis, and detoxification metabolism of two different plant species i.e., legumes (Glycine max) and grass (Avena sativa). Moreover, we investigated the potentiality of plant growth-promoting bacteria (ST-PGPB) in mitigating the phytotoxic effect of triclosan. Triclosan induced biomass (fresh and dry weights) reduction in both plants, but to a higher extent in oats. This decline was associated with a noticeable increment in the oxidative damage (e.g., MDA and H2O2) and detoxification metabolites such as metallothionein (MTC), phytochelatins (PCs), and glutathione-S-transferase (GST). This elevation was associated with a remarkable reduction in both enzymatic and non-enzymatic antioxidants. On the other hand, the bioactive strain of ST-PGPB, Salinicoccus sp. JzA1 significantly alleviated the harmful effect of triclosan on both soybean and oat plants by enhancing their biomass, photosynthesis, as well as levels of minerals (K, Ca, P, Mn, and Zn). In parallel, a striking quenching in oxidative damage and an obvious improvement in non-enzymatic (polyphenols, tocopherols, flavonoids) and enzymatic antioxidants were observed. Furthermore, Salinicoccus sp. JzA1 augmented the detoxification metabolism by enhancing the levels of phytochelatins, metallothionein, and glutathione-S-transferase (GST) activity in a species-specific manner which is more apparent in soybean rather than in oat plants. To this end, stress mitigating impact of Salinicoccus sp. JzA1 provides a basis to improve the resilience of crop species under cosmetics and personal care products toxicity.
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Affiliation(s)
- Waleed A Alsiary
- Department of Environmental Sciences, Faculty of Meteorology, Environment and Arid Land Agriculture, King Abdulaziz University, Jeddah, 21441, Saudi Arabia
| | - Mahmoud M Y Madany
- Department of Botany and Microbiology, Faculty of Science, Cairo University, Giza, 12613, Egypt; Biology Department, College of Science, Taibah University, Al-Madinah Al-Munawwarah 41411, Saudi Arabia.
| | - Hamada AbdElgawad
- Department of Botany, Faculty of Science, Beni-Suef University, Beni-Suef, Egypt
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12
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Yang D, Zuo M, Chen Y, Liu Y, He Y, Wang H, Liu X, Xu J, Zhao M, Shen Y, Liu Y, Tianpeng G. Effects of the promoting bacterium on growth of plant under cadmium stress. INTERNATIONAL JOURNAL OF PHYTOREMEDIATION 2024; 26:339-348. [PMID: 37553855 DOI: 10.1080/15226514.2023.2241925] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/10/2023]
Abstract
Cadmium (Cd) pollution is a huge threat to ecosystem health. In the manuscript, pot experiments were conducted to investigate the changes in plant biomass and antioxidant indicators under different cadmium pollution levels (0, 25, 50, and 100 mg/kg) of inoculation of plant growth-promoting bacteria ZG7 on sugar beet. The results showed that the accumulation of excess Cd in sugar beet exhibited different symptoms, including reduced biomass (p < 0.05). Compared with the group treated with uninoculated strain ZG7, inoculation of strain ZG7 significantly reduced the toxicity of sugar beet to Cd and enhanced its antioxidant capacity, with no significant differences in root biomass and increases in leaf biomass of 15.71, 5.84, and 74.12 under different Cd concentration treatments (25, 50, and 100 mg/kg), respectively. The root enrichment of Cd was reduced by 49.13, 47.26, and 21.50%, respectively (p < 0.05). The leaf fraction was reduced by 59.35, 29.86, and 30.99%, respectively (p < 0.05). In addition, the enzymatic activities of sucrase, urease, catalase, and neutral phosphatase were significantly enhanced in the soil (p < 0.05). This study helps us to further investigate the mechanism of cadmium toxicity reduction by inoculated microorganisms and provides a theoretical reference for growing plants in cadmium-contaminated agricultural fields.
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Affiliation(s)
- Deng Yang
- School of Biology and Pharmaceutical Engineering, Lanzhou Jiaotong University, Lanzhou, China
| | - Mingbo Zuo
- School of Biology and Environmental Engineering, Xi'an University, Xi'an, China
| | - Yueli Chen
- School of Biology and Pharmaceutical Engineering, Lanzhou Jiaotong University, Lanzhou, China
| | - Yuan Liu
- School of Biology and Environmental Engineering, Xi'an University, Xi'an, China
| | - Yueqing He
- School of Biology and Pharmaceutical Engineering, Lanzhou Jiaotong University, Lanzhou, China
| | - Haoming Wang
- School of Biology and Pharmaceutical Engineering, Lanzhou Jiaotong University, Lanzhou, China
| | - Xiaoxiao Liu
- School of Biology and Environmental Engineering, Xi'an University, Xi'an, China
| | - Jing Xu
- School of Biology and Environmental Engineering, Xi'an University, Xi'an, China
| | - Minjuan Zhao
- School of Biology and Environmental Engineering, Xi'an University, Xi'an, China
| | - Yuanyuan Shen
- School of Biology and Environmental Engineering, Xi'an University, Xi'an, China
| | - Ying Liu
- Shaaxi Key Laboratory of Agricultural and Environmental Microbiology, College of Life Sciences, Northwest A&F University, Yangling, China
| | - Gao Tianpeng
- School of Biology and Pharmaceutical Engineering, Lanzhou Jiaotong University, Lanzhou, China
- School of Biology and Environmental Engineering, Xi'an University, Xi'an, China
- Engineering Center for Pollution Control and Ecological Restoration in Mining of Gansu Province, Lanzhou City University, Lanzhou, China
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13
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Zulfiqar U, Haider FU, Maqsood MF, Mohy-Ud-Din W, Shabaan M, Ahmad M, Kaleem M, Ishfaq M, Aslam Z, Shahzad B. Recent Advances in Microbial-Assisted Remediation of Cadmium-Contaminated Soil. PLANTS (BASEL, SWITZERLAND) 2023; 12:3147. [PMID: 37687393 PMCID: PMC10490184 DOI: 10.3390/plants12173147] [Citation(s) in RCA: 24] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2023] [Revised: 08/29/2023] [Accepted: 08/29/2023] [Indexed: 09/10/2023]
Abstract
Soil contamination with cadmium (Cd) is a severe concern for the developing world due to its non-biodegradability and significant potential to damage the ecosystem and associated services. Industries such as mining, manufacturing, building, etc., rapidly produce a substantial amount of Cd, posing environmental risks. Cd toxicity in crop plants decreases nutrient and water uptake and translocation, increases oxidative damage, interferes with plant metabolism and inhibits plant morphology and physiology. However, various conventional physicochemical approaches are available to remove Cd from the soil, including chemical reduction, immobilization, stabilization and electro-remediation. Nevertheless, these processes are costly and unfriendly to the environment because they require much energy, skilled labor and hazardous chemicals. In contrasting, contaminated soils can be restored by using bioremediation techniques, which use plants alone and in association with different beneficial microbes as cutting-edge approaches. This review covers the bioremediation of soils contaminated with Cd in various new ways. The bioremediation capability of bacteria and fungi alone and in combination with plants are studied and analyzed. Microbes, including bacteria, fungi and algae, are reported to have a high tolerance for metals, having a 98% bioremediation capability. The internal structure of microorganisms, their cell surface characteristics and the surrounding environmental circumstances are all discussed concerning how microbes detoxify metals. Moreover, issues affecting the effectiveness of bioremediation are explored, along with potential difficulties, solutions and prospects.
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Affiliation(s)
- Usman Zulfiqar
- Department of Agronomy, Faculty of Agriculture and Environment, The Islamia University of Bahawalpur, Bahawalpur 63100, Pakistan;
| | - Fasih Ullah Haider
- Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, China;
- University of Chinese Academy of Sciences, Beijing 100039, China
| | | | - Waqas Mohy-Ud-Din
- Institute of Soil and Environmental Sciences, University of Agriculture, Faisalabad 38040, Pakistan;
- Department of Soil and Environmental Sciences, Ghazi University, D. G. Khan 32200, Pakistan
- Institute of Marine and Environmental Technology, University of Maryland Center for Environmental Science, Baltimore, MD 21202, USA
| | - Muhammad Shabaan
- Land Resources Research Institute (LRRI), National Agricultural Research Centre (NARC), Islamabad, Pakistan;
| | - Muhammad Ahmad
- Department of Agronomy, University of Agriculture, Faisalabad 38040, Pakistan; (M.A.); (M.I.)
| | - Muhammad Kaleem
- Department of Botany, University of Agriculture, Faisalabad 38040, Pakistan;
| | - Muhammad Ishfaq
- Department of Agronomy, University of Agriculture, Faisalabad 38040, Pakistan; (M.A.); (M.I.)
- Department of Agriculture, Extension, Azad Jammu & Kashmir, Pakistan
| | - Zoya Aslam
- Soil and Environmental Biotechnology Division, National Institute for Biotechnology and Genetic Engineering, Constituent College of Pakistan Institute of Engineering and Applied Sciences, Faisalabad, Pakistan
| | - Babar Shahzad
- Tasmanian Institute of Agriculture, University of Tasmania, Hobart, TAS 7001, Australia
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Maslennikova D, Koryakov I, Yuldashev R, Avtushenko I, Yakupova A, Lastochkina O. Endophytic Plant Growth-Promoting Bacterium Bacillus subtilis Reduces the Toxic Effect of Cadmium on Wheat Plants. Microorganisms 2023; 11:1653. [PMID: 37512826 PMCID: PMC10386265 DOI: 10.3390/microorganisms11071653] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2023] [Revised: 06/19/2023] [Accepted: 06/23/2023] [Indexed: 07/30/2023] Open
Abstract
Heavy metal ions, in particular cadmium (Cd), have a negative impact on the growth and productivity of major crops, including wheat. The use of environmentally friendly approaches, in particular, bacteria that have a growth-stimulating and protective effect, can increase the resistance of plants. The effects of the pre-sowing seed treatment with the plant growth-promoting endophyte Bacillus subtilis 10-4 (BS) on cadmium acetate (Cd)-stressed Triticum aestivum L. (wheat) growth, photosynthetic pigments, oxidative stress parameters, roots' lignin content, and Cd ions accumulation in plants were analyzed. The results showed that the tested Cd-tolerant BS improved the ability of wheat seeds to germinate in the presence of different Cd concentrations (0, 0.1, 0.5, and 1 mM). In addition, the bacterial treatment significantly decreased the damaging effects of Cd stress (1 mM) on seedlings' linear dimensions (lengths of roots and shoots), biomass, as well as on the integrity and permeability of the cell walls (i.e., lipid peroxidation and electrolyte leakage) and resulted in reduced H2O2 generation. The pretreatment with BS prevented the Cd-induced degradation of the leaf photosynthetic pigments chlorophyll (Chl) a, Chl b, and carotenoids. Moreover, the bacterial treatment intensified the lignin deposition in the roots under normal and, especially, Cd stress conditions, thereby enhancing the barrier properties of the cell wall. This manifested in a reduced Cd ions accumulation in the roots and in the restriction of its translocation to the aboveground parts (shoots) of the bacterized plants under Cd stress in comparison with non-bacterized controls. Thus, the pre-sowing seed treatment with the endophyte BS may serve as an eco-friendly approach to improve wheat production in Cd-contaminated areas.
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Affiliation(s)
| | - Igor Koryakov
- Institute of Biochemistry and Genetics UFRC RAS, Ufa 450054, Russia
| | - Ruslan Yuldashev
- Institute of Biochemistry and Genetics UFRC RAS, Ufa 450054, Russia
| | - Irina Avtushenko
- Institute of Biochemistry and Genetics UFRC RAS, Ufa 450054, Russia
- Department of Biology, Ufa University of Sciences and Technology, 32 Zaki Validi, Ufa 450076, Russia
| | - Albina Yakupova
- Institute of Biochemistry and Genetics UFRC RAS, Ufa 450054, Russia
- Department of Biology, Ufa University of Sciences and Technology, 32 Zaki Validi, Ufa 450076, Russia
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15
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Ahmed S, Mudassar S, Sardar R, Yasin NA. 28-Homo-Brassinolide Confers Cadmium Tolerance in Vigna radiate L. Through Modulating Minerals Uptake, Antioxidant System and Gas Exchange Attributes. JOURNAL OF PLANT GROWTH REGULATION 2023. [DOI: 10.1007/s00344-023-11027-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Accepted: 05/05/2023] [Indexed: 06/16/2023]
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16
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Yang Y, Zhang Y, Zhang L, Zhou Z, Zhang J, Yang J, Gao X, Chen R, Huang Z, Xu Z, Li L. Isolation of Bacillus siamensis B-612, a Strain That Is Resistant to Rice Blast Disease and an Investigation of the Mechanisms Responsible for Suppressing Rice Blast Fungus. Int J Mol Sci 2023; 24:ijms24108513. [PMID: 37239859 DOI: 10.3390/ijms24108513] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Revised: 04/28/2023] [Accepted: 05/07/2023] [Indexed: 05/28/2023] Open
Abstract
Rice yield can be significantly impacted by rice blast disease. In this investigation, an endophytic strain of Bacillus siamensis that exhibited a potent inhibitory effect on the growth of rice blast was isolated from healthy cauliflower leaves. 16S rDNA gene sequence analysis showed that it belongs to the genus Bacillus siamensis. Using the rice OsActin gene as an internal control, we analyzed the expression levels of genes related to the defense response of rice. Analysis showed that the expression levels of genes related to the defense response in rice were significantly upregulated 48 h after treatment. In addition, peroxidase (POD) activity gradually increased after treatment with B-612 fermentation solution and peaked 48 h after inoculation. These findings clearly demonstrated that the 1-butanol crude extract of B-612 retarded and inhibited conidial germination as well as the development of appressorium. The results of field experiments showed that treatment with B-612 fermentation solution and B-612 bacterial solution significantly reduced the severity of the disease before the seedling stage of Lijiangxintuan (LTH) was infected with rice blast. Future studies will focus on exploring whether Bacillus siamensis B-612 produces new lipopeptides and will apply proteomic and transcriptomic approaches to investigate the signaling pathways involved in its antimicrobial effects.
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Affiliation(s)
- Yanmei Yang
- Crop Ecophysiolgy and Cultivation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu 611130, China
| | - Yifan Zhang
- Crop Ecophysiolgy and Cultivation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu 611130, China
| | - Luyi Zhang
- Crop Ecophysiolgy and Cultivation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu 611130, China
| | - Zhanmei Zhou
- Crop Ecophysiolgy and Cultivation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu 611130, China
| | - Jia Zhang
- Crop Ecophysiolgy and Cultivation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu 611130, China
| | - Jinchang Yang
- Maize Research Institute of Sichuan Agricultural University, Chengdu 611130, China
| | - Xiaoling Gao
- Crop Ecophysiolgy and Cultivation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu 611130, China
| | - Rongjun Chen
- Crop Ecophysiolgy and Cultivation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu 611130, China
| | - Zhengjian Huang
- Crop Ecophysiolgy and Cultivation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu 611130, China
| | - Zhengjun Xu
- Crop Ecophysiolgy and Cultivation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu 611130, China
| | - Lihua Li
- Crop Ecophysiolgy and Cultivation Key Laboratory of Sichuan Province, Sichuan Agricultural University, Chengdu 611130, China
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Dong Q, Liu Q, Goodwin PH, Deng X, Xu W, Xia M, Zhang J, Sun R, Wu C, Wang Q, Wu K, Yang L. Isolation and Genome-Based Characterization of Biocontrol Potential of Bacillus siamensis YB-1631 against Wheat Crown Rot Caused by Fusarium pseudograminearum. J Fungi (Basel) 2023; 9:jof9050547. [PMID: 37233258 DOI: 10.3390/jof9050547] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2023] [Revised: 04/18/2023] [Accepted: 05/03/2023] [Indexed: 05/27/2023] Open
Abstract
Fusarium crown rot (FCR) caused by Fusarium pseudograminearum is one of the most serious soil-borne diseases of wheat. Among 58 bacterial isolates from the rhizosphere soil of winter wheat seedlings, strain YB-1631 was found to have the highest in vitro antagonism to F. pseudograminearum growth. LB cell-free culture filtrates inhibited mycelial growth and conidia germination of F. pseudograminearum by 84.14% and 92.23%, respectively. The culture filtrate caused distortion and disruption of the cells. Using a face-to-face plate assay, volatile substances produced by YB-1631 inhibited F. pseudograminearum growth by 68.16%. In the greenhouse, YB-1631 reduced the incidence of FCR on wheat seedlings by 84.02% and increased root and shoot fresh weights by 20.94% and 9.63%, respectively. YB-1631 was identified as Bacillus siamensis based on the gyrB sequence and average nucleotide identity of the complete genome. The complete genome was 4,090,312 bp with 4357 genes and 45.92% GC content. In the genome, genes were identified for root colonization, including those for chemotaxis and biofilm production, genes for plant growth promotion, including those for phytohormones and nutrient assimilation, and genes for biocontrol activity, including those for siderophores, extracellular hydrolase, volatiles, nonribosomal peptides, polyketide antibiotics, and elicitors of induced systemic resistance. In vitro production of siderophore, β-1, 3-glucanase, amylase, protease, cellulase, phosphorus solubilization, and indole acetic acid were detected. Bacillus siamensis YB-1631 appears to have significant potential in promoting wheat growth and controlling wheat FCR caused by F. pseudograminearum.
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Affiliation(s)
- Qianqian Dong
- College of Life Sciences, Henan Agricultural University, Zhengzhou 450046, China
- Institute of Plant Protection Research, Henan Academy of Agricultural Sciences, Henan Agricultural Microbiology Innovation Center, Zhengzhou 450002, China
| | - Qingxiang Liu
- College of Life Sciences, Henan Agricultural University, Zhengzhou 450046, China
- Institute of Plant Protection Research, Henan Academy of Agricultural Sciences, Henan Agricultural Microbiology Innovation Center, Zhengzhou 450002, China
| | - Paul H Goodwin
- School of Environmental Sciences, University of Guelph, Guelph, ON N1G 2W1, Canada
| | - Xiaoxu Deng
- Institute of Plant Protection Research, Henan Academy of Agricultural Sciences, Henan Agricultural Microbiology Innovation Center, Zhengzhou 450002, China
| | - Wen Xu
- Institute of Plant Protection Research, Henan Academy of Agricultural Sciences, Henan Agricultural Microbiology Innovation Center, Zhengzhou 450002, China
| | - Mingcong Xia
- Institute of Plant Protection Research, Henan Academy of Agricultural Sciences, Henan Agricultural Microbiology Innovation Center, Zhengzhou 450002, China
| | - Jie Zhang
- Institute of Plant Protection Research, Henan Academy of Agricultural Sciences, Henan Agricultural Microbiology Innovation Center, Zhengzhou 450002, China
| | - Runhong Sun
- Institute of Plant Protection Research, Henan Academy of Agricultural Sciences, Henan Agricultural Microbiology Innovation Center, Zhengzhou 450002, China
| | - Chao Wu
- Institute of Plant Protection Research, Henan Academy of Agricultural Sciences, Henan Agricultural Microbiology Innovation Center, Zhengzhou 450002, China
| | - Qi Wang
- College of Plant Protection, China Agricultural University, Beijing 100193, China
| | - Kun Wu
- College of Life Sciences, Henan Agricultural University, Zhengzhou 450046, China
| | - Lirong Yang
- Institute of Plant Protection Research, Henan Academy of Agricultural Sciences, Henan Agricultural Microbiology Innovation Center, Zhengzhou 450002, China
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18
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Awan SA, Khan I, Rizwan M, Irshad MA, Xiaosan W, Zhang X, Huang L. Reduction in the cadmium (Cd) accumulation and toxicity in pearl millet (Pennisetum glaucum L.) by regulating physio-biochemical and antioxidant defense system via soil and foliar application of melatonin. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2023; 328:121658. [PMID: 37075919 DOI: 10.1016/j.envpol.2023.121658] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2023] [Revised: 03/12/2023] [Accepted: 04/16/2023] [Indexed: 05/03/2023]
Abstract
Cadmium (Cd) is among the toxic pollutants that harms the both animals and plants. The natural antioxidant, melatonin can improve Cd-stress tolerance but its potential role in reducing Cd stress and resilience mechanisms in pearl millet (Pennisetum glaucum L.) is remain unclear. The present study suggests that Cd causes severe oxidative damage by decreasing photosynthesis, and increasing reactive oxygen species (ROS), malondialdehyde content (MDA), and Cd content in different parts of pearl millet. However, exogenous melatonin (soil application and foliar treatment) mitigated the Cd toxicity and enhanced the growth, antioxidant defense system, and differentially regulated the expression of antioxidant-responsive genes i. e superoxide dismutase SOD-[Fe] 2, Fe-superoxide dismutase, Peroxiredoxin 2C, and L-ascorbate peroxidase-6. The results showed that foliar melatonin at F-200/50 significantly increased the plant height, chlorophyll a, b, a+b and carotenoids by 128%, 121%, 150%, 122%, and 69% over the Cd treatment, respectively. The soil and foliar melatonin at S-100/50 and F-100/50 reduced the ROS by 36%, and 44%, and MDA by 42% and 51% over the Cd treatment, respectively. Moreover, F200/50 significantly boosted the activities of antioxidant enzymes i. e SOD by 141%, CAT 298%, POD 117%, and APX 155% over the Cd treatment. Similarly, a significant reduction in Cd content in root, stem, and leaf was found on exposure to higher concentrations of exogenous melatonin. These findings suggest that exogenous melatonin may significantly and differentially improve the tolerance to Cd stress in crop plants. However, field applications, type of plant species, concentration of dose, and type of stress may vary with the degree of tolerance in crop plants.
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Affiliation(s)
- Samrah Afzal Awan
- College of Grassland Science & Technology, Sichuan Agricultural University, Chengdu, 611130, China; College of Agronomy, Sichuan Agricultural University, Chengdu, 611130, China
| | - Imran Khan
- College of Grassland Science & Technology, Sichuan Agricultural University, Chengdu, 611130, China; State Key Laboratory of Herbage Improvement and Grassland Agro-Ecosystems, Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou 730020, China
| | - Muhammad Rizwan
- Department of Environmental Sciences, Government College University Faisalabad, Faisalabad, Pakistan
| | - Muhammad Atif Irshad
- Department of Environmental Sciences, The University of Lahore, Lahore, Pakistan
| | - Wang Xiaosan
- College of Grassland Science & Technology, Sichuan Agricultural University, Chengdu, 611130, China
| | - Xinquan Zhang
- College of Grassland Science & Technology, Sichuan Agricultural University, Chengdu, 611130, China
| | - Linkai Huang
- College of Grassland Science & Technology, Sichuan Agricultural University, Chengdu, 611130, China.
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Abstract
The genus Bacillus has been widely applied in contemporary agriculture as an environmentally-friendly biological agent. However, the real effect of commercial Bacillus-based fertilizers and pesticides varies immensely in the field. To harness Bacillus for efficient wheat production, we reviewed the diversity, functionality, and applicability of wheat-associated native Bacillus for the first time. Our main findings are: (i) Bacillus spp. inhabit the rhizosphere, root, stem, leaf, and kernel of wheat; (ii) B. subtilis and B. velezensis are the most widely endophytic species that can be isolated from both below and aboveground tissues; (iii) major functions of these representative strains are promotion of plant growth and alleviation of both abiotic and biotic stresses in wheat; (iv) stability and effectiveness are 2 major challenges during field application; (v) a STVAE pipeline that includes 5 processes, namely, Screen, Test, Validation, Application, and Evaluation, has been proposed for the capture and refinement of wheat-associated Bacillus spp. In particular, this review comprehensively addresses possible solutions, concerns, and criteria during the development of native Bacillus-based inoculants for sustainable wheat production.
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Rios-Ruiz WF, Tuanama-Reátegui C, Huamán-Córdova G, Valdez-Nuñez RA. Co-Inoculation of Endophytes Bacillus siamensis TUR07-02b and Priestia megaterium SMBH14-02 Promotes Growth in Rice with Low Doses of Nitrogen Fertilizer. PLANTS (BASEL, SWITZERLAND) 2023; 12:524. [PMID: 36771609 PMCID: PMC9919783 DOI: 10.3390/plants12030524] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/04/2022] [Revised: 12/30/2022] [Accepted: 01/04/2023] [Indexed: 06/18/2023]
Abstract
Multiple biotic and abiotic factors influence rice cultivation. These factors limit productivity and yield, as well as an irrational use of agrochemicals in rice cultivation. A sustainable alternative is using selected growth-promoting microorganisms to increase nutritional efficiency. In the present study, the direct mechanisms of growth promotion in two strains of Bacillus, three strains of Priestia, and two strains of Burkholderia endophytes of rice were characterized. Bacillus siamensis TUR07-02b and Priestia megaterium SMBH14-02 were selected to promote Oryza sativa var's growth. "Bellavista" was used at different doses (50, 75, and 100%) of mineral nitrogen (N) using a randomized block design by quintuplicate. Both strains, SMBH14-02 and TUR07-02b, presented outstanding promoter characteristics, including auxin production (123.17 and 335.65 μg mL-1, respectively) and biological nitrogen fixation capacity. Similarly, B. siamensis TUR07-02b could solubilize phosphate-Ca (20.94 μg mL-1), cellulases, and pectinases. Under greenhouse conditions, co-inoculated plants receiving 75% of the total dose of mineral nitrogen showed increased agronomic parameters in relation to panicle length, grains per panicle, grain yield, and harvest index by 25.0, 30.7, 39.5, and 12.5%, respectively, compared to the 75% fertilized treatment without inoculation. The strains of B. siamensis TUR07-02b and P. megaterium SMBH14-02 are potential microbial resources in the formulation of new inoculants to reduce the use of nitrogenous fertilizers. Thus, agronomic validation of the inoculant consortium at the field level will be an essential step in providing an alternative for the sustainable management of rice cultivation and increased productivity of rice farmers in the San Martín region.
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Affiliation(s)
- Winston Franz Rios-Ruiz
- Laboratorio de Microbiología Agrícola, Departamento Académico Agrosilvopastoril, Facultad de Ciencias Agrarias, Universidad Nacional de San Martín, Tarapoto 22202, Perú
| | - Ciceron Tuanama-Reátegui
- Laboratorio de Microbiología Agrícola, Departamento Académico Agrosilvopastoril, Facultad de Ciencias Agrarias, Universidad Nacional de San Martín, Tarapoto 22202, Perú
| | - Gamaniel Huamán-Córdova
- Laboratorio de Microbiología Agrícola, Departamento Académico Agrosilvopastoril, Facultad de Ciencias Agrarias, Universidad Nacional de San Martín, Tarapoto 22202, Perú
| | - Renzo Alfredo Valdez-Nuñez
- Departamento Académico de Ciencias Básicas, Facultad de Ingeniería, Universidad Nacional de Barranca, Barranca 15169, Perú
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Jin X, Rahman MKU, Ma C, Zheng X, Wu F, Zhou X. Silicon modification improves biochar's ability to mitigate cadmium toxicity in tomato by enhancing root colonization of plant-beneficial bacteria. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2023; 249:114407. [PMID: 36508786 DOI: 10.1016/j.ecoenv.2022.114407] [Citation(s) in RCA: 20] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2022] [Revised: 11/16/2022] [Accepted: 12/07/2022] [Indexed: 06/17/2023]
Abstract
Modification of biochar, such as impregnation with minerals, can improve biochar's efficacy to mitigate heavy metal toxicity in plants. Biochar amendments can alter plant rhizosphere microbiome, which has profound effects on plant growth and fitness. Here, we tested whether rhizosphere microbiome is involved in the ability of silicon (Si)-modified biochar to mitigate cadmium toxicity in tomato (Solanum lycopersicum L.). We demonstrated that Si modification altered biochar's physico-chemical properties and enhanced its ability to mitigate cadmium toxicity in tomato. Particularly, the Si-modified biochar contained higher content of Si and increased plant-available Si content in the soil. The rhizosphere microbiome transplant experiment showed that changes in rhizosphere microbiome contributed to the mitigation of cadmium toxicity by biochar amendments. The raw biochar and Si-modified biochar differently altered tomato rhizosphere bacterial community composition. Both biochars, especially the Si-modified biochar, promoted specific bacterial taxa (e.g., Sphingomonas, Lysobacter and Pseudomonas spp.). Subsequent culturing found these promoted bacteria could mitigate cadmium toxicity in tomato. Moreover, both biochars stimulated tomato to recruit plant-beneficial bacteria with Si-modified biochar having stronger stimulatory effects, indicating that the positive effects of biochar on plant-beneficial bacteria was partially mediated via the host plant. Overall, Si modification enhanced biochar's ability to mitigate cadmium toxicity, which was linked to the stimulatory effects on plant-beneficial bacteria.
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Affiliation(s)
- Xue Jin
- Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (Northeast Region), Ministry of Agriculture and Rural Affairs, Department of Horticulture, Northeast Agricultural University, Harbin 150030, China
| | - Muhammad Khashi U Rahman
- Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (Northeast Region), Ministry of Agriculture and Rural Affairs, Department of Horticulture, Northeast Agricultural University, Harbin 150030, China
| | - Changli Ma
- Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (Northeast Region), Ministry of Agriculture and Rural Affairs, Department of Horticulture, Northeast Agricultural University, Harbin 150030, China
| | - Xianqing Zheng
- Institute of Eco-Environment and Plant Protection, Shanghai Academy of Agricultural Sciences, Shanghai 201403, China
| | - Fengzhi Wu
- Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (Northeast Region), Ministry of Agriculture and Rural Affairs, Department of Horticulture, Northeast Agricultural University, Harbin 150030, China
| | - Xingang Zhou
- Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (Northeast Region), Ministry of Agriculture and Rural Affairs, Department of Horticulture, Northeast Agricultural University, Harbin 150030, China.
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Abdelkrim S, Abid G, Chaieb O, Taamalli W, Mannai K, Louati F, Jebara M, Jebara SH. Plant growth promoting rhizobacteria modulates the antioxidant defense and the expression of stress-responsive genes providing Pb accumulation and tolerance of grass pea. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:10789-10802. [PMID: 36083364 DOI: 10.1007/s11356-022-22874-4] [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: 03/30/2022] [Accepted: 08/31/2022] [Indexed: 06/15/2023]
Abstract
To ensure the success of phytoremediation, it is important to consider the appropriate combination of plants and microorganisms. This study was conducted to get a better insight into the underlying molecular and biochemical mechanism of grass pea (Lathyrus sativus L.) induced by plant growth promoting rhizobacteria (PGPR), when exposed for 3, 6, 9, and 14 days to 1 mM Pb in a hydroponic system. The significant positive effect of bacterial inoculation was reproduced in various parameters. Results indicated that inoculation of PGPR significantly increased the accumulation of Pb by 20%, 66%, 43%, and 36% in roots and by 46%, 55%, 37%, and 46% in shoots, respectively after 3, 6, 9, and 14 days of metal exposure compared to the uninoculated plants. The metal accumulation in grass pea plants triggered a significant elevation in the synthesis of non-protein thiols (NPT), particularly in inoculated plant leaves where it was about 3 and 2-fold higher than the uninoculated set on the 6th and the 9th day. Nevertheless, Pb treatment significantly increased oxidative stress and membrane damage in leaves with the highest hydrogen peroxide (H2O2) production and tissue malondialdehyde (MDA) concentration recorded in uninoculated plants. Furthermore, the PGPR inoculation alleviated the oxidative stress, improved significantly plant tolerance, and modulated the activities of antioxidant enzymes (SOD, CAT, APX, GR, DHAR, and MDHAR). Similarly, the expression patterns of LsPCS, LsGCN, LsCNGC, LsGR, and LsGST through qRT-PCR demonstrated that bacterial inoculation significantly induced gene expression levels in leaves 6 days after Pb treatment, indicating that PGPR act as regulators of stress-responsive genes. The findings suggest the key role of PGPR (R. leguminosarum (M5) + Pseudomonas fluorescens (K23) + Luteibacter sp. + Variovorax sp.) in enhancing Pb accumulation, reducing metal toxicity, strengthening of the antioxidant system, and conferring higher Pb tolerance to grass pea plants. Hence, the association Lathyrus sativus-PGPR is an effective tool to achieve the goal of remediation of Pb contaminated sites.
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Affiliation(s)
- Souhir Abdelkrim
- Laboratory of Legumes and Sustainable Agro-systems, Center of Biotechnology of Borj Cedria, BP 901, 2050, Hammam Lif, Tunisia
- National Agronomic Institute of Tunisia, University of Carthage, Tunis, Tunisia
| | - Ghassen Abid
- Laboratory of Legumes and Sustainable Agro-systems, Center of Biotechnology of Borj Cedria, BP 901, 2050, Hammam Lif, Tunisia
| | - Oumaima Chaieb
- Laboratory of Legumes and Sustainable Agro-systems, Center of Biotechnology of Borj Cedria, BP 901, 2050, Hammam Lif, Tunisia
| | - Wael Taamalli
- Laboratory of Olive Biotechnology, Center of Biotechnology of Borj Cedria, BP 901, 2050, Hammam Lif, Tunisia
- Higher Institute of Biotechnology of Beja, University of Jendouba, BP 382, 9000, Beja, Tunisia
| | - Khediri Mannai
- Laboratory of Legumes and Sustainable Agro-systems, Center of Biotechnology of Borj Cedria, BP 901, 2050, Hammam Lif, Tunisia
| | - Faten Louati
- Laboratory of Legumes and Sustainable Agro-systems, Center of Biotechnology of Borj Cedria, BP 901, 2050, Hammam Lif, Tunisia
| | - Moez Jebara
- Laboratory of Legumes and Sustainable Agro-systems, Center of Biotechnology of Borj Cedria, BP 901, 2050, Hammam Lif, Tunisia.
| | - Salwa Harzalli Jebara
- Laboratory of Legumes and Sustainable Agro-systems, Center of Biotechnology of Borj Cedria, BP 901, 2050, Hammam Lif, Tunisia
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Vezza ME, Pramparo RDP, Wevar Oller AL, Agostini E, Talano MA. Promising co-inoculation strategies to reduce arsenic toxicity in soybean. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:88066-88077. [PMID: 35821321 DOI: 10.1007/s11356-022-21443-z] [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: 11/25/2021] [Accepted: 06/09/2022] [Indexed: 06/15/2023]
Abstract
Arsenic (As) is the cause for concern worldwide due to its high toxicity. Its presence in agricultural soils and groundwater adversely affects soybean (Glycine max L.) growth and yield and also endangers food safety. Plant growth-promoting rhizobacteria (PGPR) could be used as part of cost-effective and eco-friendly strategies to mitigate As phytotoxicity. However, simple inoculation of soybean with PGPR Bradyrhizobium japonicum E109 (E109), a common practice in Argentina, is not effective in counteracting the effects of As exposure. Our aim was to assess whether the response of soybean to arsenate (AsV) and arsenite (AsIII) could be helpfully modulated by co-inoculating E109 with the free-living PGPRs Azospirillum brasilense Cd (Cd) or Bacillus pumilus SF5 (SF5). Co-inoculation with E109 + SF5 alleviated As-induced depletion of chlorophyll a and b, and carotenoid content, reaching an increase of 26, 28 y 31%, respectively. It also enhanced nodulation (15-19%) under As exposure. E109 + Cd and E109 + SF5 induced changes in the antioxidant system, which could be related to the maintenance of redox homeostasis. Moreover, As accumulation was reduced by 53% in aerial parts of plants inoculated with E109 + Cd, and by 16% in the roots of those inoculated with E109 + SF5. The strains selected show interesting potential for the development of biotechnological schemes to improve soybean yield while guaranteeing safer food production.
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Affiliation(s)
- Mariana Elisa Vezza
- Departamento de Biología Molecular, FCEFQyN, Instituto de Biotecnología Ambiental Y Salud, INBIAS-CONICET, Universidad Nacional de Río Cuarto (UNRC), Ruta Nacional 36 Km 601, 5800, Río Cuarto, Córdoba, CP, Argentina
| | - Romina Del Pilar Pramparo
- Departamento de Biología Molecular, FCEFQyN, Instituto de Biotecnología Ambiental Y Salud, INBIAS-CONICET, Universidad Nacional de Río Cuarto (UNRC), Ruta Nacional 36 Km 601, 5800, Río Cuarto, Córdoba, CP, Argentina
| | - Ana Laura Wevar Oller
- Departamento de Biología Molecular, FCEFQyN, Instituto de Biotecnología Ambiental Y Salud, INBIAS-CONICET, Universidad Nacional de Río Cuarto (UNRC), Ruta Nacional 36 Km 601, 5800, Río Cuarto, Córdoba, CP, Argentina
| | - Elizabeth Agostini
- Departamento de Biología Molecular, FCEFQyN, Instituto de Biotecnología Ambiental Y Salud, INBIAS-CONICET, Universidad Nacional de Río Cuarto (UNRC), Ruta Nacional 36 Km 601, 5800, Río Cuarto, Córdoba, CP, Argentina.
| | - Melina Andrea Talano
- Departamento de Biología Molecular, FCEFQyN, Instituto de Biotecnología Ambiental Y Salud, INBIAS-CONICET, Universidad Nacional de Río Cuarto (UNRC), Ruta Nacional 36 Km 601, 5800, Río Cuarto, Córdoba, CP, Argentina
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24
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Zhou X, Zhang X, Ma C, Wu F, Jin X, Dini-Andreote F, Wei Z. Biochar amendment reduces cadmium uptake by stimulating cadmium-resistant PGPR in tomato rhizosphere. CHEMOSPHERE 2022; 307:136138. [PMID: 36002065 DOI: 10.1016/j.chemosphere.2022.136138] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2022] [Revised: 08/06/2022] [Accepted: 08/17/2022] [Indexed: 06/15/2023]
Abstract
Biochar amendment in the soil can exert a positive effect in reducing heavy metal toxicity in plants. However, it remains unclear the extent to which this effect is associated with the modulation of plant growth-promoting rhizobacteria (PGPR). Here, we initially conducted a pot experiment using tomato (Solanum lycopersicum L.) as a model plant grown in soil spiked with cadmium. First, we found biochar amendment to result in reduced cadmium uptake in tomato plants and trackable changes in the tomato rhizosphere microbiome. Then, a rhizosphere transplant experiment validated the importance of this microbiome modulation for cadmium-toxicity amelioration. Sequence-based analyses targeted the isolation of representative isolates of PGPR, including Bacillus and Flavisolibacter spp. that displayed in vitro cadmium tolerance and biosorption capabilities (in addition to abilities to solubilize phosphate and produce indole acetic acid). Last, we performed a soil inoculation experiment and confirmed the effectiveness of these isolates in reducing cadmium toxicity in tomato plants. Besides, we found the inoculation of these taxa as single inoculant and in combination to result in increased activities of specific antioxidant enzymes in tomato tissues. Taken together, this study revealed the ecological and physiological mechanisms by which biochar amendment indirectly alleviate cadmium toxicity in tomato plants, in this case, via the modulation and activity of specific PGPR populations. This study provides new insights into strategies able to promote beneficial PGPR in the rhizosphere with potential application to ameliorate heavy metal toxicity in plants.
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Affiliation(s)
- Xingang Zhou
- Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (Northeast Region), Ministry of Agriculture and Rural Affairs, Department of Horticulture, Northeast Agricultural University, Harbin, 150030, PR China
| | - Xianhong Zhang
- Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (Northeast Region), Ministry of Agriculture and Rural Affairs, Department of Horticulture, Northeast Agricultural University, Harbin, 150030, PR China
| | - Changli Ma
- Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (Northeast Region), Ministry of Agriculture and Rural Affairs, Department of Horticulture, Northeast Agricultural University, Harbin, 150030, PR China
| | - Fengzhi Wu
- Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (Northeast Region), Ministry of Agriculture and Rural Affairs, Department of Horticulture, Northeast Agricultural University, Harbin, 150030, PR China
| | - Xue Jin
- Key Laboratory of Biology and Genetic Improvement of Horticultural Crops (Northeast Region), Ministry of Agriculture and Rural Affairs, Department of Horticulture, Northeast Agricultural University, Harbin, 150030, PR China.
| | - Francisco Dini-Andreote
- Department of Plant Science & Huck Institutes of the Life Sciences, The Pennsylvania State University, University Park, PA, USA
| | - Zhong Wei
- Jiangsu Provincial Key Lab for Organic Solid Waste Utilization, National Engineering Research Center for Organic-based Fertilizers, Jiangsu Collaborative Innovation Center for Solid Organic Waste Resource Utilization, Nanjing Agricultural University, Nanjing, 210095, PR China.
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25
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Bashir S, Javed S, Al-Anazi KM, Farah MA, Ali S. Bioremediation of Cadmium Toxicity in Wheat ( Triticum aestivum L.) Plants Primed with L-Proline, Bacillus subtilis and Aspergillus niger. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:12683. [PMID: 36231984 PMCID: PMC9564855 DOI: 10.3390/ijerph191912683] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/07/2022] [Revised: 09/17/2022] [Accepted: 09/20/2022] [Indexed: 06/16/2023]
Abstract
Cadmium toxicity is one of the deleterious abiotic factors that reduce wheat production. Two different cultivars (Akbar and Dilkash) were compared for their cadmium (0, 40 and 80 mg/kg) tolerance and responses towards Bacillus subtilis NA2, Aspergillus niger PMI-118 and L-proline. Both microbes were tested for heavy metal tolerance and production of various plant hormones and biological active enzyme characteristics under normal and cadmium stress. A completely randomized design (two cultivars × four treatments × three cadmium levels × three replicates) was adopted using distilled water as a control. The growth promotion potential of these strains under cadmium stress was determined by N-fixation, IAA synthesis, P-solubilization, amylase and proteases production. A pot experiment under controlled conditions was conducted to evaluate the effect of bacteria, fungi, and L-proline under cadmium stress. It was indicated from the result that plant biomass (46.43%), shoot length (22.40%), root length (25.06%), chlorophyll (17.17%), total sugars (27.07%), total proteins (86.01%) and ascorbic acid (83.27%) were improved with inoculation under control and cadmium stress. The accumulation of total flavonoids (48.64%), total phenolics (24.88%), hydrogen peroxide (53.96%) and activities of antioxidant enzymes CAT (26.37%) and APX (43.71%) were reduced in the plants treated with bacteria, fungi and L-proline than those under control. With parallel aids, Bacillus subtilis NA2 showed a higher cadmium tolerance and plant growth stability as compared to Aspergillus niger PMI-118 and L-proline and may be adopted in the future.
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Affiliation(s)
- Sarmad Bashir
- Department of Biochemistry, Government College University, Faisalabad 38000, Pakistan
| | - Sadia Javed
- Department of Biochemistry, Government College University, Faisalabad 38000, Pakistan
| | - Khalid Mashay Al-Anazi
- Department of Zoology, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
| | - Mohammad Abul Farah
- Department of Zoology, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
| | - Sajad Ali
- Department of Biotechnology, Yeungnam University, Gyeongsan 38541, Korea
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26
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Feng S, Zhang P, Hu Y, Jin F, Liu Y, Cai S, Song Z, Zhang X, Nadezhda T, Guo Z, Lynch I, Dang X. Combined application of biochar and nano-zeolite enhanced cadmium immobilization and promote the growth of Pak Choi in cadmium contaminated soil. NANOIMPACT 2022; 28:100421. [PMID: 36031145 DOI: 10.1016/j.impact.2022.100421] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2022] [Revised: 07/13/2022] [Accepted: 08/21/2022] [Indexed: 06/15/2023]
Abstract
Biochar and zeolite have been demonstrated effective to remove heavy metals in soil; however, the effect of combined application of the both materials on the fraction of Cd and soil-plant system are largely unknown. Cd fractions in soil, growth and Cd uptake of Pak Choi were measured after the combined application of biochar (0, 5, 10 and 20 g·kg-1) and nano-zeolite (0, 5, 10, 20 g·kg-1) by pot experiment. Results showed that both single and combined application reduced the exchangeable Cd in soil and improved the plant growth. However, combined application of 20 g·kg-1 biochar with 10 g·kg-1 nano-zeolite showed the strongest effect, with the residual Cd in soil increased by 214% as compared with control. 20 g·kg-1 biochar with 10 g·kg-1 nano-zeolite Mechanic studies showed that this combination enhanced the antioxidant system, with the SOD, CAT and POD activities enhanced by 56.1%, 133.3% and 235.3%, respectively. The oxidative stress was reduced correspondingly, as shown by the reduced MDA contents (by 46.7%). This combination also showed the best efficiency in regulating soil pH, organic matter and soil enzymes thus improving the plant growth. This study suggests that combined application various materials such as biochar and nano-zeolite may provide new strategies for reducing the bioavailability of Cd in soil and thus the accumulation in edible plants.
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Affiliation(s)
- Shanshan Feng
- College of Land and Environment, National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, Northeast Key Laboratory of Conservation and Improvement of Cultivated Land, Ministry of Agriculture and Rural Affairs, Shenyang Agricultural University, Shenyang 110866, PR China
| | - Peng Zhang
- School of Geography, Earth and Environmental Sciences, University of Birmingham, Edgbaston, B15 2TT Birmingham, UK
| | - Yanmei Hu
- College of Land and Environment, National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, Northeast Key Laboratory of Conservation and Improvement of Cultivated Land, Ministry of Agriculture and Rural Affairs, Shenyang Agricultural University, Shenyang 110866, PR China
| | - Feng Jin
- School of Materials Science and Engineering, Nanjing University of Science and Technology, Nanjing 210094, PR China
| | - Yuqing Liu
- College of Land and Environment, National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, Northeast Key Laboratory of Conservation and Improvement of Cultivated Land, Ministry of Agriculture and Rural Affairs, Shenyang Agricultural University, Shenyang 110866, PR China
| | - Shixin Cai
- College of Land and Environment, National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, Northeast Key Laboratory of Conservation and Improvement of Cultivated Land, Ministry of Agriculture and Rural Affairs, Shenyang Agricultural University, Shenyang 110866, PR China
| | - Zijie Song
- College of Land and Environment, National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, Northeast Key Laboratory of Conservation and Improvement of Cultivated Land, Ministry of Agriculture and Rural Affairs, Shenyang Agricultural University, Shenyang 110866, PR China
| | - Xing Zhang
- College of Land and Environment, National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, Northeast Key Laboratory of Conservation and Improvement of Cultivated Land, Ministry of Agriculture and Rural Affairs, Shenyang Agricultural University, Shenyang 110866, PR China
| | - Tcyganova Nadezhda
- Farming and Grassland Science Department, Saint-Petersburg State Agrarian University, Saint-Petersburg 196601, Russia
| | - Zhiling Guo
- School of Geography, Earth and Environmental Sciences, University of Birmingham, Edgbaston, B15 2TT Birmingham, UK
| | - Iseult Lynch
- School of Geography, Earth and Environmental Sciences, University of Birmingham, Edgbaston, B15 2TT Birmingham, UK
| | - Xiuli Dang
- College of Land and Environment, National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, Northeast Key Laboratory of Conservation and Improvement of Cultivated Land, Ministry of Agriculture and Rural Affairs, Shenyang Agricultural University, Shenyang 110866, PR China.
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27
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Liu N, Liu Q, Min J, Zhang S, Li S, Chen Y, Dai J. Specific bacterial communities in the rhizosphere of low-cadmium and high‑zinc wheat (Triticum aestivum L.). THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 838:156484. [PMID: 35667435 DOI: 10.1016/j.scitotenv.2022.156484] [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: 12/27/2021] [Revised: 05/31/2022] [Accepted: 06/01/2022] [Indexed: 06/15/2023]
Abstract
Microorganisms can modulate the contents of cadmium (Cd) and zinc (Zn) in wheat grains. Increasing the essential nutrient element Zn and decreasing the toxic element Cd in wheat grains can significantly improve human health. To characterize the specific bacterial communities associated with Cd and Zn accumulation in wheat, we conducted a field experiment by planting wheat cultivars differing in their capacity for Cd and Zn accumulation. The grain Cd contents in wheat cultivars YN23 (0.078 mg kg-1), JN17 (0.080 mg kg-1), YN836 (0.081 mg kg-1) and LM2 (0.091 mg kg-1) were significantly lower than those in ZM32 (0.16 mg kg-1). The Zn contents were significantly higher in the grains of JN17 (44.36 mg kg-1), LM2 (42.22 mg kg-1) and ZM32 (43.19 mg kg-1) than YN23 (27.05 mg kg-1) and YN836 (29.70 mg kg-1). On the basis of contents and bio-concentration factors of Cd and Zn in wheat grain, JN17 and LM2 were identified as low-Cd- and high-Zn-accumulating cultivars, YN23 and YN836 were low-Cd- and low-Zn-accumulating cultivars, and ZM23 was a high-Cd- and high-Zn-accumulating cultivar. The relative abundance values of Gemmatimonadaceae, Sphingomonadaceae and Beijerinckiaceae in the rhizospheres of low-Cd cultivars were significantly higher than those of high-Cd cultivars. High-Zn cultivars had higher abundance of Rhodanobacteraceae in the rhizosphere than did low-Zn cultivars. The low-Cd- and high-Zn-accumulating cultivars were enriched in Alphaproteobacteria and Gemmatimonadaceae, and strengthened nitrification function including aerobic_ammonia_oxidation and aerobic_nitrite_oxidation in the rhizosphere soil, thus contributing to the decreased Cd and increased Zn contents in wheat grains. Microbial technology is a promising method to control the contents of Cd and Zn in wheat grains.
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Affiliation(s)
- Na Liu
- College of Resource and Environment, Shanxi Agricultural University, Taigu 030801, China; Environment Research Institute, Shandong University, Qingdao 266237, China; Shanxi Key Laboratory of Edible Fungi for Loess Plateau, Taigu 030801, China
| | - Qian Liu
- Shandong General Station of Agricultural Environmental Protection and Rural Energy, Jinan 250000, China
| | - Jianmei Min
- Shandong General Station of Agricultural Environmental Protection and Rural Energy, Jinan 250000, China
| | - Shujuan Zhang
- Shandong General Station of Agricultural Environmental Protection and Rural Energy, Jinan 250000, China
| | - Shuangshuang Li
- Environment Research Institute, Shandong University, Qingdao 266237, China
| | - Yihui Chen
- Environment Research Institute, Shandong University, Qingdao 266237, China; Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China
| | - Jiulan Dai
- Environment Research Institute, Shandong University, Qingdao 266237, China.
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28
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Wei T, Li H, Yashir N, Li X, Jia H, Ren X, Yang J, Hua L. Effects of urease-producing bacteria and eggshell on physiological characteristics and Cd accumulation of pakchoi (Brassica chinensis L.) plants. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:63886-63897. [PMID: 35469379 DOI: 10.1007/s11356-022-20344-5] [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: 12/16/2021] [Accepted: 04/14/2022] [Indexed: 06/14/2023]
Abstract
Soil cadmium (Cd) contamination resulting from anthropogenic activity poses severe threats to food safety and human health. In this study, a pot experiment was performed to evaluate the possibility of using urease-producing bacterium UR21 and eggshell (ES) waste for improving the physiological characteristics and reducing Cd accumulation of pakchoi (Brassica chinensis L.) plants. UR21 has siderophore and IAA production ability. The application of UR21 and ES individually or in combination could improve the root and shoot length, and fresh and dry weight of pakchoi plants under Cd stress. In Cd + ES + UR21-treated plants, the dry weight of shoot and root were increased by 61.54% and 72.73%, respectively. The chlorophyll a, chlorophyll b, and carotenoid content were increased by 52.19%, 42.95%, and 95.56% in Cd + ES + UR21-treated plants. Meanwhile, the H2O2 and MDA content were decreased while the SOD and POD activity were increased, and an increase of soluble protein level in pakchoi plants was observed under Cd + ES + UR21 treatment. Importantly, eggshell and UR21 alone or in combination induced a decline of Cd content in pakchoi plants, especially that Cd + ES + UR21 treatment decreased Cd content in shoot and root by 26.96% and 42.91%, respectively. Meanwhile, the soil urease and sucrase activities were enhanced. Generally, the combined application of ureolytic bacteria UR21 and eggshell exhibited better effects than applied them individually in terms of alleviating Cd toxicity in pakchoi plants. Our findings may give a unique perspective for an eco-friendly and sustainable strategy to remediate heavy metal-polluted soils.
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Affiliation(s)
- Ting Wei
- School of Environmental Science and Engineering, Shaanxi University of Science & Technology, Xi'an 710021, People's Republic of China
| | - Hong Li
- School of Environmental Science and Engineering, Shaanxi University of Science & Technology, Xi'an 710021, People's Republic of China
| | - Noman Yashir
- School of Environmental Science and Engineering, Shaanxi University of Science & Technology, Xi'an 710021, People's Republic of China
| | - Xian Li
- School of Environmental Science and Engineering, Shaanxi University of Science & Technology, Xi'an 710021, People's Republic of China
| | - Honglei Jia
- School of Environmental Science and Engineering, Shaanxi University of Science & Technology, Xi'an 710021, People's Republic of China
| | - Xinhao Ren
- School of Environmental Science and Engineering, Shaanxi University of Science & Technology, Xi'an 710021, People's Republic of China
| | - Jing Yang
- School of Environmental Science and Engineering, Shaanxi University of Science & Technology, Xi'an 710021, People's Republic of China
| | - Li Hua
- School of Environmental Science and Engineering, Shaanxi University of Science & Technology, Xi'an 710021, People's Republic of China.
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Wyszkowska J, Borowik A, Zaborowska M, Kucharski J. Evaluation of the Usefulness of Sorbents in the Remediation of Soil Exposed to the Pressure of Cadmium and Cobalt. MATERIALS (BASEL, SWITZERLAND) 2022; 15:ma15165738. [PMID: 36013875 PMCID: PMC9415538 DOI: 10.3390/ma15165738] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2022] [Revised: 08/09/2022] [Accepted: 08/17/2022] [Indexed: 06/01/2023]
Abstract
An undesirable side effect of economic progress is increasingly severe pollution with heavy metals, responsible for the degradation of ecosystems, including soil resources. Hence, this research focused on examining six adsorbents in order to distinguish a reactive mineral with the highest capacity to remediate soils contaminated with heavy metals. To this end, the soil was polluted with Co2+ and Cd2+ by applying the metals in concentrations of 100 mg kg-1 d.m. The extent of soil equilibrium disturbances was assessed by evaluating the response of the soil microbiome, activity of seven soil enzymes, and the yields of Helianthus annuus L. Six sorbents were evaluated: a molecular sieve, expanded clay (ExClay), halloysite, zeolite, sepiolite and biochar. Co2+ and Cd2+ proved to be significant inhibitors of the soil's microbiological and biochemical parameters. Organotrophic bacteria among the analysed groups of microorganisms and dehydrogenases among the soil enzymes were most sensitive to the effects of the metals. Both metals significantly distorted the growth and development of sunflower, with Co2+ having a stronger adverse impact on the synthesis of chlorophyll. The molecular sieve and biochar were the sorbents that stimulated the multiplication of microorganisms and enzymatic activity in the contaminated soil. The activity of enzymes was also stimulated significantly by zeolite and sepiolite, while the growth of Helianthus annuus L. biomass was stimulated by the molecular sieve, which can all be considered the most useful reactive materials in the remediation of soils exposed to Co2+ and Cd2+.
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Jia R, Chen J, Hu L, Liu X, Xiao K, Wang Y. Alcaligenes faecalis Juj3 alleviates Plasmodiophora brassicae stress to cabbage via promoting growth and inducing resistance. FRONTIERS IN SUSTAINABLE FOOD SYSTEMS 2022. [DOI: 10.3389/fsufs.2022.942409] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Clubroot is a devastating disease threatening global cruciferous vegetable production caused by Plasmodiophora brassicae (Pb). We have evaluated the positive effects of the Alcaligenes faecalis Juj3 on cabbage growth promotion and Pb stress alleviation through pot and field experiments. The Juj3 strain was isolated from a healthy cabbage rhizosphere with growth-promoting characteristics and was identified as A. faecalis based on morphological traits and phylogeny. Seed germination assays revealed that Juj3 inoculation enhances cabbage bud shoot and root growth. In pot experiments, inoculation with Juj3 fermentation powder at cabbage sowing dates significantly improved the seedling biomass. Combining seed treatments with root irrigation after transplanting considerably reduced the clubroot disease index and resulted in appreciable biocontrol efficacy (83.7%). Gene expression analyses of cabbage after Juj3 inoculation showed that PR2 and EIN3 expression were significantly up-regulated. Physiologically, Juj3 inoculation enhanced cabbage chlorophyll content and root activity in a normal environment. Irrespective of whether plants were under normal environment or Pb stresses, Juj3 improved photosynthesis. Field trial analyses revealed that Juj3 exhibits satisfactory biocontrol efficacy in cabbage (51.4%) and Chinese cabbage (37.7%). Moreover, Juj3 could also enhance cabbage and Chinese cabbage biomass to improve the yield quality. These findings pave the way for future use of A. faecalis as biocontrol agents for clubroot and reveal the great potential of the rhizobacterium for plant growth-promoting applications in agriculture and horticulture.
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Akhtar N, Khan S, Jamil M, Rehman SU, Rehman ZU, Rha ES. Combine Effect of ZnO NPs and Bacteria on Protein and Gene's Expression Profile of Rice ( Oryza sativa L.) Plant. TOXICS 2022; 10:305. [PMID: 35736913 PMCID: PMC9230029 DOI: 10.3390/toxics10060305] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/28/2022] [Revised: 05/23/2022] [Accepted: 05/27/2022] [Indexed: 02/01/2023]
Abstract
Heavy metal (HM) emissions have increased due to the impact of rising urbanization and anthropogenic activity, affecting different parts of the environment. The goal of this study is to investigate the combined effect of ZnO NPs and bacteria treatment on protein and gene expression profiles of rice plants that are grown in HMs-polluted water. Seeds were primed with Bacillus spp. (Bacillus cereus and Lysinibacillus macroides) before being cultured in Hoagland media containing ZnO NPs (5 and 10 mg/L) and HMs-contaminated water from the Hayatabad industrial estate (HIE), Peshawar, Pakistan. The results revealed that the maximum nitrogen and protein content was observed in the root, shoot, and leaf of the plant grown by combining bacteria-ZnO NPs treatment under HMs stress as compared with plant grown without or with individual treatments of ZnO NPs and bacteria. Furthermore, protein expression analysis by sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS PAGE) revealed that plants that were grown in HMs-polluted water were found to be affected in contaminated water, however the combined effect of bacteria-ZnO NPs reported the more dense protein profile as compared with their individual treatments. Subsequently, plants that were grown in HMs-polluted water have the highest expression levels of stress-induced genes such as myeloblastosis (Myb), zinc-finger protein (Zat-12), and ascorbate peroxidase (Apx) while the combined effect revealed minimum expression as compared with individual treatments. It is concluded that the combined effect of ZnO NPs and bacteria lowered the stress-induced gene expression while it increased the nitrogen-protein content and protein expression in plant grown under HMs stress.
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Affiliation(s)
- Nazneen Akhtar
- Department of Biotechnology and Genetic Engineering, Kohat University of Science & Technology (KUST), Kohat 26000, Pakistan; (N.A.); (S.K.); (Z.U.R.)
| | - Sehresh Khan
- Department of Biotechnology and Genetic Engineering, Kohat University of Science & Technology (KUST), Kohat 26000, Pakistan; (N.A.); (S.K.); (Z.U.R.)
| | - Muhammad Jamil
- Department of Biotechnology and Genetic Engineering, Kohat University of Science & Technology (KUST), Kohat 26000, Pakistan; (N.A.); (S.K.); (Z.U.R.)
| | - Shafiq Ur Rehman
- Department of Biology, University of Haripur, Haripur 22620, Pakistan;
| | - Zia Ur Rehman
- Department of Biotechnology and Genetic Engineering, Kohat University of Science & Technology (KUST), Kohat 26000, Pakistan; (N.A.); (S.K.); (Z.U.R.)
| | - Eui Shik Rha
- Department of Well-Being Resources, Sunchon National University, Suncheon 540-742, Korea
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Ajmal AW, Yasmin H, Hassan MN, Khan N, Jan BL, Mumtaz S. Heavy Metal–Resistant Plant Growth–Promoting Citrobacter werkmanii Strain WWN1 and Enterobacter cloacae Strain JWM6 Enhance Wheat (Triticum aestivum L.) Growth by Modulating Physiological Attributes and Some Key Antioxidants Under Multi-Metal Stress. Front Microbiol 2022; 13:815704. [PMID: 35602039 PMCID: PMC9120770 DOI: 10.3389/fmicb.2022.815704] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2021] [Accepted: 02/03/2022] [Indexed: 12/24/2022] Open
Abstract
Due to wastewater irrigation, heavy metal (HM) exposure of agricultural soils is a major limiting factor for crop productivity. Plant growth–promoting bacteria (PGPB) may lower the risk of HM toxicity and increase crop yield. In this context, we evaluated two HM-resistant PGPB strains, i.e., Citrobacter werkmanii strain WWN1 and Enterobacter cloacae strain JWM6 isolated from wastewater-irrigated agricultural soils, for their efficacy to mitigate HM (Cd, Ni, and Pb) stress in a pot experiment. Increasing concentrations (0, 50, 100, and 200 ppm) of each HM were used to challenge wheat plants. Heavy metal stress negatively affected wheat growth, biomass, and physiology. The plants under elevated HM concentration accumulated significantly higher amounts of heavy metals (HMs) in shoots and roots, resulting in increased oxidative stress, which was evident from increased malondialdehyde (MDA) content in roots and shoots. Moreover, alterations in antioxidants like superoxide dismutase (SOD), peroxidase (POD), ascorbate peroxidase (APX), and catalase (CAT) were observed in plants under HM stress. The severity of damage was more pronounced with rising HM concentration. However, inoculating wheat with Citrobacter werkmanii strain WWN1 and Enterobacter cloacae strain JWM6 (107 CFU ml–1) improved plant shoot length (11–42%), root length (19–125%), fresh weight (41–143%), dry weight (65–179%), and chlorophyll a (14%-24%) and chlorophyll b content (2–24%) under HM stress. Citrobacter werkmanii strain WWN1 and Enterobacter cloacae strain JWM6 either alone or in co-inoculation enhanced the antioxidant enzyme activity, which may lower oxidative stress in plants. However, seeds treated with the bacterial consortium showed an overall better outcome in altering oxidative stress and decreasing HM accumulation in wheat shoot and root tissues. Fourier transform infrared spectroscopy indicated the changes induced by HMs in functional groups on the biomass surface that display effective removal of HMs from aqueous medium using PGPB. Thus, the studied bacterial strains may have adequate fertilization and remediation potential for wheat cultivated in wastewater-irrigated soils. However, molecular investigation of mechanisms adopted by these bacteria to alleviate HM stress in wheat is required to be conducted.
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Affiliation(s)
- Abdul Wahab Ajmal
- Department of Biosciences, COMSATS University Islamabad, Islamabad, Pakistan
| | - Humaira Yasmin
- Department of Biosciences, COMSATS University Islamabad, Islamabad, Pakistan
- Humaira Yasmin,
| | | | - Naeem Khan
- Department of Agronomy, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL, United States
| | - Basit Latief Jan
- Department of Clinical Pharmacy, College of Pharmacy, King Saud University, Riyadh, Saudi Arabia
| | - Saqib Mumtaz
- Department of Biosciences, COMSATS University Islamabad, Islamabad, Pakistan
- *Correspondence: Saqib Mumtaz, ,
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Awan SA, Khan I, Rizwan M, Ali Z, Ali S, Khan N, Arumugam N, Almansour AI, Ilyas N. A new technique for reducing accumulation, transport, and toxicity of heavy metals in wheat (Triticum aestivum L.) by bio-filtration of river wastewater. CHEMOSPHERE 2022; 294:133642. [PMID: 35063550 DOI: 10.1016/j.chemosphere.2022.133642] [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] [Received: 11/15/2021] [Revised: 01/05/2022] [Accepted: 01/13/2022] [Indexed: 06/14/2023]
Abstract
The occurrence of contaminants such as heavy metals in an aqueous environment has become a global concern. In the present study, a bio-filter was designed to eliminate heavy metals from river wastewater contaminated with industrial effluents. Moreover, we analyzed simple tap water, bio-filtered water, and unfiltered river wastewater and measured the concentrations of different heavy metals in the samples, such as cadmium (Cd), nickel (Ni), lead (Pb), and copper (Cu). The current experiment explored irrigation effects of three water regimes (tap water, bio-filtered water, and wastewater) on two wheat (Triticum aestivum L.) varieties (NARC-2009 and NARC-2011). Results of the present study indicated that wastewater negatively influenced the growth parameters and photosynthetic contents along with a significant increase in oxidative damage in terms of electrolyte leakage (EL) (50 and 61%), hydrogen peroxide (H2O2) (52 and 61 μmol/g), and malondialdehyde (MDA) (16 and 17.7 μmol/g) contents in NARC-2009 and NARC-2011 respectively. However, bio-filtered water positively regulated the growth profile, activities of antioxidants such as superoxide dismutase (SOD), catalase (CAT), peroxidase (POD), total soluble sugars, amino acids, total protein, and proline contents in wheat as compared with untreated wastewater. In addition, bio-filtered water had significant impacts on the reduction of Cd, Ni, Pb, and Cu concentrations in roots, shoots, and grains of both wheat varieties as compared to wastewater. The concentrations (mg/kg) of Cd (15 and 18), Ni (35 and 57), Pb (5 and 7), and Cu (69 and 72) in roots, Cd (5 and 6), Ni (24 and 43), Pb (3 and 4), and Cu (16 and 19) in shoots, and Cd (0.7 and 1.0), Ni (11 and 26), Pb (2 and 3), and Cu (1.6 and 1.5) in grains of NARC-2009 and NARC-2011 were found under river wastewater treatment. Overall, wastewater treatment through bio-filtration process is an effective strategy for the reduction of toxic elements in bio-filtered water and their accumulation by plants.
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Affiliation(s)
- Samrah Afzal Awan
- College of Grassland Science & Technology, Sichuan Agricultural University, Chengdu, 611130, China; Department of Botany, PMAS-Arid Agriculture University, Rawalpindi, 46000, Pakistan
| | - Imran Khan
- College of Grassland Science & Technology, Sichuan Agricultural University, Chengdu, 611130, China; Department of Botany, PMAS-Arid Agriculture University, Rawalpindi, 46000, Pakistan
| | - Muhammad Rizwan
- Department of Environmental Sciences and Engineering, Government College University, Faisalabad, Allama Iqbal Road, 38000 Faisalabad, Pakistan
| | - Zeshan Ali
- Plant Physiology Program, Crop Sciences Institute, National Agricultural Research Centre, Park Road, Islamabad, Pakistan
| | - Shafaqat Ali
- Department of Environmental Sciences and Engineering, Government College University, Faisalabad, Allama Iqbal Road, 38000 Faisalabad, Pakistan; Department of Biological Sciences and Technology, China Medical University, Taichung, 40402, Taiwan
| | - Naeem Khan
- Department of Agronomy, Institute of Food and Agricultural Sciences, University of Florida, Gainesville, FL, 32611, USA
| | - Natarajan Arumugam
- Department of Chemistry, College of Science, King Saud University, P.O Box 2455, Riyadh, 11451, Saudi Arabia
| | - Abdulrahman I Almansour
- Department of Chemistry, College of Science, King Saud University, P.O Box 2455, Riyadh, 11451, Saudi Arabia
| | - Noshin Ilyas
- Department of Botany, PMAS-Arid Agriculture University, Rawalpindi, 46000, Pakistan.
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Khanna K, Kohli SK, Ohri P, Bhardwaj R, Ahmad P. Agroecotoxicological Aspect of Cd in Soil–Plant System: Uptake, Translocation and Amelioration Strategies. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:30908-30934. [PMID: 0 DOI: 10.1007/s11356-021-18232-5] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Accepted: 12/16/2021] [Indexed: 05/27/2023]
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Al-Shwaiman HA, Shahid M, Elgorban AM, Siddique KHM, Syed A. Beijerinckia fluminensis BFC-33, a novel multi-stress-tolerant soil bacterium: Deciphering the stress amelioration, phytopathogenic inhibition and growth promotion in Triticum aestivum (L.). CHEMOSPHERE 2022; 295:133843. [PMID: 35122822 DOI: 10.1016/j.chemosphere.2022.133843] [Citation(s) in RCA: 24] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/03/2022] [Revised: 01/28/2022] [Accepted: 01/31/2022] [Indexed: 05/16/2023]
Abstract
Environmental challenges like drought, salinity, heavy metals and pesticides directly/indirectly influence the environment and decreased the agricultural output. During its long developmental stages, cereal crops including wheat is exposed to a variety of abiotic/biotic stressors. Certain beneficial soil bacteria that can ameliorate environmental stresses can be exploited as crop growth promoters/enhancers under adverse situations. In this study, Beijerinckia fluminensis BFC-33 (accession no. MT672580) isolated from potato rhizosphere tolerated variousabiotic (drought, salinity, temperature, heavy metals, and fungicides) stresses. Strain BFC-33 demonstrated multifarious plant-growth-promoting (PGP) characteristics, such as the production of indole-3-acetic acid, P-solubilization, ACC deaminase, ammonia, siderophore, HCN, EPS, and extracellular enzymes. The antagonistic potential of BFC-33 against major fungal pathogens was ranked: Alternaria alternata (79.2%)>Rhizoctonia solani (69%)>Fusarium oxysporum (23.5%)>Ustilaginoidea virens (17%). Furthermore, bacterization of wheat seeds witha multi-stress-tolerant strain revealed B. fluminensis as a plant growth enhancer and biocontrol agent. For instance, increase in root length (cm) in BFC-33 inoculated wheat exposed to abiotic and biotic stresses at the seedling stage was ranked: B. fluminensis (24.2)>B. fluminensis + 100μgTBZLmL-1 (21.3) = B. fluminensis + 2%PEG (21.3)>B. fluminensis + 100 mM NaCl (19.7)>B. fluminensis + 100μgPbmL-1 (19) = B. fluminensis 100μgMNZBmL-1 (19)>B. fluminensis + A. alternata (17.4)>B. fluminensis + 100μgCdmL-1 (17)>B. fluminensis + F. oxysporum (13.4). In addition, increase in carotenoid accumulation (mg g-1FW) in the foliage of BFC-33 inoculated wheat exposed to fungal infection was ranked: BFC-33 (3.88)>BFC-33+ A. alternata (3.0)>BFC-33+ R. solani (2.78)>BFC-33+ F. oxysporum (2.44). Moreover, BFC-33 inoculation significantly (p ≤ 0.05) reduced stress-induced stressor molecules (proline and TBARS) and electrolyte leakage. Furthermore, B. fluminensis BFC-33 potentially enhanced the defense responses in wheat seedlings by increasing phenylalanine ammonia lyase (PAL), β-1,3 glucanase, and polyphenol oxidase (PPO), which play a significant role in protecting plants from phytopathogens. Even so, by successfully establishing a product with the requisite effects under field settings, selecting multi-stress-tolerant and antagonistic plant growth promoting rhizobacteria (PGPRs) would be helpful to end-users. Future use of native multi-stress-tolerant bacteria as biocontrol agents in conjunction with existing drought, salinity, heavy metal, and pesticide tolerance might contribute to global food security.
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Affiliation(s)
- Hind A Al-Shwaiman
- Department of Botany and Microbiology, College of Sciences, King Saud University, P.O. Box 2455, Riyadh, 11451, Saudi Arabia
| | - Mohammad Shahid
- Department of Agricultural Microbiology, Faculty of Agricultural Sciences, Aligarh Muslim University, Aligarh, 202002, Uttar Pradesh, India.
| | - Abdallah M Elgorban
- Department of Botany and Microbiology, College of Sciences, King Saud University, P.O. Box 2455, Riyadh, 11451, Saudi Arabia
| | - Kadambot H M Siddique
- The UWA Institute of Agriculture and School of Agriculture & Environment, The University of Western Australia, Perth, WA, 6001, Australia
| | - Asad Syed
- Department of Botany and Microbiology, College of Sciences, King Saud University, P.O. Box 2455, Riyadh, 11451, Saudi Arabia.
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Zhang ZW, Deng ZL, Tao Q, Peng HQ, Wu F, Fu YF, Yang XY, Xu PZ, Li Y, Wang CQ, Chen YE, Yuan M, Lan T, Tang XY, Chen GD, Zeng J, Yuan S. Salicylate and glutamate mediate different Cd accumulation and tolerance between Brassica napus and B. juncea. CHEMOSPHERE 2022; 292:133466. [PMID: 34973246 DOI: 10.1016/j.chemosphere.2021.133466] [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: 11/02/2021] [Revised: 12/22/2021] [Accepted: 12/27/2021] [Indexed: 06/14/2023]
Abstract
Most hyperaccumulator plants have little economic values, and therefore have not been widely used in Cd-contaminated soils. Rape species are Cd hyperaccumulators with high economic values. Black mustard seed (Brassica juncea) has a higher accumulation ability and a higher tolerance for Cd than oilseed rape (Brassica napus), but its biomass is relatively low and its geographical distribution is limited. However, it is unknown why B. juncea (Bj) is more tolerant to and accumulates more Cd than B. napus (Bn). Here, we found that the differences in Cd accumulation and tolerance between the two species is mainly because Bj plants have higher levels of salicylic acid and glutamic acid than Bn plants. Exogenous salicylate and glutamate treatments enhanced Cd accumulation (salicylate + glutamate co-treatment doubled Cd accumulation level in Bn seedlings) but reduced oxidative stresses by increasing glutathione biosynthesis and activating phytochelatin-based sequestration of Cd into vacuoles. Our results provide a new idea to simultaneously improve Cd accumulation and Cd tolerance in B. napus.
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Affiliation(s)
- Zhong-Wei Zhang
- College of Resources, Sichuan Agricultural University, Chengdu, 611130, China
| | - Zong-Lin Deng
- College of Resources, Sichuan Agricultural University, Chengdu, 611130, China
| | - Qi Tao
- College of Resources, Sichuan Agricultural University, Chengdu, 611130, China
| | - Hong-Qian Peng
- Agriculture and Rural Affairs Committee of Shapingba District, Chongqing, 400030, China
| | - Fan Wu
- Sichuan Provincial Academy of Natural Resource Sciences, Chengdu, 610015, China
| | - Yu-Fan Fu
- College of Resources, Sichuan Agricultural University, Chengdu, 611130, China
| | - Xin-Yue Yang
- College of Resources, Sichuan Agricultural University, Chengdu, 611130, China
| | - Pei-Zhou Xu
- Rice Research Institute, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China
| | - Yun Li
- Rape Research Institute, Chengdu Academy of Agriculture and Forestry, Chengdu, Sichuan, 611130, China
| | - Chang-Quan Wang
- College of Resources, Sichuan Agricultural University, Chengdu, 611130, China
| | - Yang-Er Chen
- College of Life Science, Sichuan Agricultural University, Ya'an, 625014, China
| | - Ming Yuan
- College of Life Science, Sichuan Agricultural University, Ya'an, 625014, China
| | - Ting Lan
- College of Resources, Sichuan Agricultural University, Chengdu, 611130, China
| | - Xiao-Yan Tang
- College of Resources, Sichuan Agricultural University, Chengdu, 611130, China
| | - Guang-Deng Chen
- College of Resources, Sichuan Agricultural University, Chengdu, 611130, China
| | - Jian Zeng
- College of Resources, Sichuan Agricultural University, Chengdu, 611130, China
| | - Shu Yuan
- College of Resources, Sichuan Agricultural University, Chengdu, 611130, China.
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Genomic and Experimental Analysis of the Biostimulant and Antagonistic Properties of Phytopathogens of Bacillus safensis and Bacillus siamensis. Microorganisms 2022; 10:microorganisms10040670. [PMID: 35456723 PMCID: PMC9024481 DOI: 10.3390/microorganisms10040670] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2022] [Revised: 02/22/2022] [Accepted: 02/24/2022] [Indexed: 12/21/2022] Open
Abstract
The B. safensis RGM 2450 and B. siamensis RGM 2529 strains were isolated from the rhizosphere of plants presenting resilience to abiotic and biotic stress conditions. To understand the implications of bacteria in resilience, a genomic and experimental analysis was carried out on their biostimulant and phytopathogenic antagonist properties. Genome analyses of both strains indicated that they have the potential to synthesize bioactive compounds such as the battery of non-ribosomal peptides, polyketides, extracellular enzymes and phytohormones. These results were consistent with the antagonistic activities of both strains against the phytopathogens Botrytis cinerea, Colletotrichum acutatum, Fusarium oxysporum and Phytophtora cinnamomi. They also showed the capacity to solubilize phosphorus, fix nitrogen and produce indole acetic acid. This was observed in tomato seedlings grown from seeds inoculated with the mixture of strains which presented significantly greater length as well as wet and dry weight in comparison with the treatments individually inoculated with each strain and the control. Accordingly, the combination of B. safensis RGM 2450 and B. siamensis RGM 2529 showed synergistic biostimulant activity. These findings contribute new knowledge of the genomic and metabolomic properties taking part in the symbiotic interactions between these strains and the plants and uphold the combined use of both strains as a biostimulant.
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de Anicésio ÉCA, Monteiro FA. Potassium reduces oxidative stress in tanzania guinea grass under cadmium toxicity. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:1184-1198. [PMID: 34350569 DOI: 10.1007/s11356-021-15620-9] [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: 12/31/2020] [Accepted: 07/20/2021] [Indexed: 06/13/2023]
Abstract
Plants used for phytoextraction of metals need to tolerate toxicity conditions. Potassium (K) participates in physiological and biochemical processes that can alleviate toxicity by heavy metals, including cadmium (Cd). This study aimed to evaluate the effect of K on photosynthesis and on the changes in the antioxidant system of tanzania guinea grass [Panicum maximum Jacq. cv. Tanzania (syn. Megathyrsus maximus (Jacq,) B.K. Simon & S.W.L. Jacobs)] under Cd toxicity. Plants were grown in a greenhouse, in nutrient solution, in a randomized complete block design, arranged in a 3 × 4 factorial, with three replications. Plants were supplied with three K levels (0.4 [K deficiency], 6.0, and 11.6 mmol L-1) and exposed to four Cd levels (0.0, 0.5, 1.0, and 1.5 mmol L-1). Two plant growth periods were evaluated. High Cd level (1.5 mmol L-1) led to a reduction in net photosynthesis (76%) by causing low stomatal conductance and losses in quantum efficiency of photosystem II. However, high K supply (11.6 mmol L-1) increased the net photosynthesis by 15% in plants exposed to 1.0 mmol L-1 Cd, due to upregulation of proline synthesis. Cd toxicity resulted in increases in lipid peroxidation and hydrogen peroxide concentration (35 and 50%; 25 and 30%, at first and second harvest, respectively) and reduction by 80-100% in activity of the antioxidant enzymes: superoxide dismutase, catalase, ascorbate peroxidase, guaiacol peroxidase, and glutathione reductase in the shoots of the grass. However, the high K supply (11.6 mmol L-1) increased the activity of these enzymes (about 50-75%) and reduced lipid peroxidation (36%), restoring cellular homeostasis. Moreover, high K supply promoted a 25% increase in spermidine and spermine concentrations in the shoots. Therefore, K reduced the Cd-induced oxidative stress and increased the net photosynthesis in tanzania guinea grass by increasing the activity of antioxidant enzymes and proline and polyamines synthesis, which enhances the tolerance of this grass to Cd.
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Affiliation(s)
- Éllen Cristina Alves de Anicésio
- Soil Science Department, University of São Paulo, "Luiz de Queiroz" College of Agriculture (ESALQ/USP), Pádua Dias Avenue, # 11, Zip Code 13418-900 Piracicaba, São Paulo, Brazil
| | - Francisco Antonio Monteiro
- Soil Science Department, University of São Paulo, "Luiz de Queiroz" College of Agriculture (ESALQ/USP), Pádua Dias Avenue, # 11, Zip Code 13418-900 Piracicaba, São Paulo, Brazil.
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Pishchik VN, Filippova PS, Mirskaya GV, Khomyakov YV, Vertebny VE, Dubovitskaya VI, Ostankova YV, Semenov AV, Chakrabarty D, Zuev EV, Chebotar VK. Epiphytic PGPB Bacillus megaterium AFI1 and Paenibacillus nicotianae AFI2 Improve Wheat Growth and Antioxidant Status under Ni Stress. PLANTS (BASEL, SWITZERLAND) 2021; 10:2334. [PMID: 34834698 PMCID: PMC8620400 DOI: 10.3390/plants10112334] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Revised: 10/22/2021] [Accepted: 10/25/2021] [Indexed: 06/12/2023]
Abstract
The present study demonstrates the Ni toxicity-ameliorating and growth-promoting abilities of two different bacterial isolates when applied to wheat (Triticum aestivum L.) as the host plant. Two bacterial strains tolerant to Ni stress were isolated from wheat seeds and selected based on their ability to improve the germination of wheat plants; they were identified as Bacillus megaterium AFI1 and Paenibacillus nicotianae AFI2. The protective effects of these epiphytic bacteria against Ni stress were studied in model experiments with two wheat cultivars: Ni stress-tolerant Leningradskaya 6 and susceptible Chinese spring. When these isolates were used as the inoculants applied to Ni-treated wheat plants, the growth parameters and the levels of photosynthetic pigments of the two wheat cultivars both under normal and Ni-stress conditions were increased, though B. megaterium AFI1 had a more pronounced ameliorative effect on the Ni contents in plant tissues due to its synthesis of siderophores. Over the 10 days of Ni exposure, the plant growth promotion bacteria (PGPB) significantly reduced the lipid peroxidation (LPO), ascorbate peroxidase (APX), superoxide dismutase (SOD) activities and proline content in the leaves of both wheat cultivars. The PGPB also increased peroxidase (POX) activity and the levels of chlorophyll a, chlorophyll b, and carotenoids in the wheat leaves. It was concluded that B. megaterium AFI1 is an ideal candidate for bioremediation and wheat growth promotion against Ni-induced oxidative stress, as it increases photosynthetic pigment contents, induces the antioxidant defense system, and lowers Ni metal uptake.
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Affiliation(s)
- Veronika N. Pishchik
- All-Russia Research Institute for Agricultural Microbiology, Podbelskogo hwy, 3, Pushkin, 196608 St. Petersburg, Russia
- Agrophysical Scientific Research Institute, Grazhdansky pr. 14, 195220 St. Petersburg, Russia; (G.V.M.); (Y.V.K.); (V.E.V.); (V.I.D.)
| | - Polina S. Filippova
- St. Petersburg Federal Research Center of the Russian Academy of Sciences, North-West Centre of Interdisciplinary Researches of Problems of Food Maintenance, Podbelskogo hwy, 7, Pushkin, 196608 St. Petersburg, Russia;
| | - Galina V. Mirskaya
- Agrophysical Scientific Research Institute, Grazhdansky pr. 14, 195220 St. Petersburg, Russia; (G.V.M.); (Y.V.K.); (V.E.V.); (V.I.D.)
| | - Yuriy V. Khomyakov
- Agrophysical Scientific Research Institute, Grazhdansky pr. 14, 195220 St. Petersburg, Russia; (G.V.M.); (Y.V.K.); (V.E.V.); (V.I.D.)
| | - Vitaliy E. Vertebny
- Agrophysical Scientific Research Institute, Grazhdansky pr. 14, 195220 St. Petersburg, Russia; (G.V.M.); (Y.V.K.); (V.E.V.); (V.I.D.)
| | - Viktoriya I. Dubovitskaya
- Agrophysical Scientific Research Institute, Grazhdansky pr. 14, 195220 St. Petersburg, Russia; (G.V.M.); (Y.V.K.); (V.E.V.); (V.I.D.)
| | - Yuliya V. Ostankova
- St. Petersburg Pasteur Institute, Federal Service for the Oversight of Consumer Protection and Welfare, 14, Mira Str., 197101 St. Petersburg, Russia;
| | - Aleksandr V. Semenov
- Yekaterinburg Research Institute of Viral Infections, The Federal Budgetary Institution of Science “State Scientific Center of Virology and Biotechnology Vector”, The Federal Service for Supervision of Consumer Rights Protection and Human Well-Being, 23, Letnyay Str., 620030 Yekaterinburg, Russia;
| | - Debasis Chakrabarty
- CSIR-National Botanical Research Institute, Rana Pratap Marg, Lucknow 22600, India;
| | - Evgeny V. Zuev
- Federal Research Center N. I. Vavilov, All-Russian Institute of Plant Genetic Resources, Bolshaya Morskaya Str., 42-44, 190000 St. Petersburg, Russia;
| | - Vladimir K. Chebotar
- All-Russia Research Institute for Agricultural Microbiology, Podbelskogo hwy, 3, Pushkin, 196608 St. Petersburg, Russia
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Zhou X, Liu X, Zhao J, Guan F, Yao D, Wu N, Tian J. The endophytic bacterium Bacillus koreensis 181-22 promotes rice growth and alleviates cadmium stress under cadmium exposure. Appl Microbiol Biotechnol 2021; 105:8517-8529. [PMID: 34609525 DOI: 10.1007/s00253-021-11613-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2021] [Revised: 09/14/2021] [Accepted: 09/18/2021] [Indexed: 11/24/2022]
Abstract
Recently, cadmium (Cd) contamination in paddy soils has become a highly concerning pollution problem. Endophytic microbes in rice not only affect the plant growth but also contribute to ion absorption by the roots. Therefore, they are a promising, ecologically sound means of reducing the Cd transport from soils to shoots and grains of the plant. In this study, a Cd-resistant endophytic bacterium, named 181-22, with high Cd absorption capacity (90.8%) was isolated from the roots of rice planting in heavily Cd-contaminated paddy soils and was identified as Bacillus koreensis CGMCC 19,468. The strain significantly increased fresh weight of roots and shoots (44.4% and 42.7%) and dry weight of roots and shoots (71.3% and 39.9%) and decreased Cd content in the rice roots (12.8%), shoots (34.3%), and grains (39.1%) under Cd stress compared to uninoculated plant by colonizing rice roots via seed inoculation. Moreover, colonization of 181-22 reprogrammed rice physiology to alleviate Cd stress by increasing pigment and total protein content, regulating Cd-induced oxidative stress enzymes such as superoxide dismutase and catalase and reducing malondialdehyde. Thus, B. koreensis 181-22 has the potential to protect rice against Cd stress and can be used as a biofertilizer to bioremediate paddy soils contaminated with Cd. KEY POINTS: • Bacillus koreensis 181-22 colonized the inside of rice roots at high numbers via seed inoculation. • B. koreensis 181-22 promoted rice growth and decreased Cd accumulation in grains. • B. koreensis 181-22 regulated the physiological response to alleviated Cd stress in rice.
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Affiliation(s)
- Xin Zhou
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing, 100081, China
| | - Xiaoqing Liu
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing, 100081, China
| | - Jintong Zhao
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing, 100081, China
| | - Feifei Guan
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing, 100081, China
| | - Dongsheng Yao
- Institute of Microbial Biotechnology, Guangdong Province, Jinan University, Guangzhou City, 510632, China
- National Engineering Research Center of Genetic Medicine, Guangdong Province, Guangzhou City, 510632, China
| | - Ningfeng Wu
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing, 100081, China.
| | - Jian Tian
- Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing, 100081, China.
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Sardar R, Ahmed S, Yasin NA. Seed priming with karrikinolide improves growth and physiochemical features of coriandrum sativum under cadmium stress. ENVIRONMENTAL ADVANCES 2021; 5:100082. [DOI: 10.1016/j.envadv.2021.100082] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
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Rai GK, Bhat BA, Mushtaq M, Tariq L, Rai PK, Basu U, Dar AA, Islam ST, Dar TUH, Bhat JA. Insights into decontamination of soils by phytoremediation: A detailed account on heavy metal toxicity and mitigation strategies. PHYSIOLOGIA PLANTARUM 2021; 173:287-304. [PMID: 33864701 DOI: 10.1111/ppl.13433] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2020] [Revised: 01/19/2021] [Accepted: 02/23/2021] [Indexed: 06/12/2023]
Abstract
In the current era of rapid industrialization, the foremost challenge is the management of industrial wastes. Activities such as mining and industrialization spill over a large quantity of toxic waste that pollutes soil, water, and air. This poses a major environmental and health challenge. The toxic heavy metals present in the soil and water are entering the food chain, which in turn causes severe health hazards. Environmental clean-up and reclamation of heavy metal contaminated soil and water are very important, and it necessitates efforts of environmentalists, industrialists, scientists, and policymakers. Phytoremediation is a plant-based approach to remediate heavy metal/organic pollutant contaminated soil and water in an eco-friendly, cost-effective, and permanent way. This review covers the effect of heavy metal toxicity on plant growth and physiological process, the concept of heavy metal accumulation, detoxification, and the mechanisms of tolerance in plants. Based on plants' ability to uptake heavy metals and metabolize them within tissues, phytoremediation techniques have been classified into six types: phytoextraction, phytoimmobilization, phytovolatilization, phytodegradation, rhizofiltration, and rhizodegradation. The development of research in this area led to the identification of metal hyper-accumulators, which could be utilized for reclamation of contaminated soil through phytomining. Concurrently, breeding and biotechnological approaches can enhance the remediation efficiency. Phytoremediation technology, combined with other reclamation technologies/practices, can provide clean soil and water to the ecosystem.
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Affiliation(s)
- Gyanendra K Rai
- School of Biotechnology, Sher-e-Kashmir University of Agricultural Sciences and Technology of Jammu, Jammu, India
| | - Basharat A Bhat
- Department of Bioresources, University of Kashmir, Jammu and Kashmir, India
| | - Muntazir Mushtaq
- School of Biotechnology, Sher-e-Kashmir University of Agricultural Sciences and Technology of Jammu, Jammu, India
| | - Lubna Tariq
- Department of Biotechnology, BGSB University, Jammu and Kashmir, India
| | - Pradeep K Rai
- Advance Center for Horticulture, Sher-e-Kashmir University of Agricultural Sciences and Technology of Jammu, Jammu, India
| | - Umer Basu
- Division of Pathology, Sher-e-Kashmir University of Agricultural Sciences and Technology of Jammu, Jammu, India
| | - Aejaz A Dar
- School of Biotechnology, Sher-e-Kashmir University of Agricultural Sciences and Technology of Jammu, Jammu, India
| | - Sheikh T Islam
- Department of Bioresources, University of Kashmir, Jammu and Kashmir, India
| | - Tanvir U H Dar
- Department of Biotechnology, BGSB University, Jammu and Kashmir, India
| | - Javaid A Bhat
- Ministry of Agriculture (MOA) Key Laboratory of Biology and Genetic Improvement of Soybean (General), State Key Laboratory for Crop Genetics and Germplasm Enhancement, Soybean Research Institute, National Center for Soybean Improvement, Nanjing Agricultural University, Nanjing, China
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Haque AM, Tasnim J, El-Shehawi AM, Rahman MA, Parvez MS, Ahmed MB, Kabir AH. The Cd-induced morphological and photosynthetic disruption is related to the reduced Fe status and increased oxidative injuries in sugar beet. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2021; 166:448-458. [PMID: 34161881 DOI: 10.1016/j.plaphy.2021.06.020] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2021] [Accepted: 06/08/2021] [Indexed: 05/20/2023]
Abstract
Cadmium (Cd) toxicity is a form of soil contamination that causes losses in plant growth and yield. Understanding the effects of Cd-induced changes in physiological and cellular processes will help scientists develop better scientific strategies for sugar beet plant improvement. Cd toxicity triggered a substantial decrease in morphological parameters and total soluble protein in sugar beets, as well as membrane damage and cell death. Furthermore, the SPAD score and photosynthetic OJIP parameters in leaves were severely affected due to Cd stress. This was correlated with the decreased FCR activity and BvIRT1 expression in roots, suggesting the adverse effect of Cd in Fe acquisition in sugar beet. Our findings also revealed that BvHMA3 and BvNRAMP3 were upregulated in Cd-exposed roots, indicating that these genes might be involved in Cd uptake in sugar beet. In silico analysis of BvHMA3 and BvNRAMP3 proteins showed close partnerships with several Arabidopsis genes mainly linked to metal tolerance protein, cation diffusion facilitator, vacuolar metal transporter, and vacuolar Fe transporter. Subsequently, Cd-exposed sugar beet showed severe sensitivity to oxidative damages resulted in elevated H2O2 and O2.- without possessed efficient antioxidant defense. Finally, growth retardation in Cd-exposed sugar beets is linked to photosynthetic inefficiency caused by low Fe levels and oxidative stress in cells. These results may be used to improve Cd-sensitive sugar beet plants by breeding or transgenic programs.
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Affiliation(s)
- Afm Mohabubul Haque
- Molecular Plant Physiology Laboratory, Department of Botany, University of Rajshahi, Rajshahi, 6205, Bangladesh
| | - Jannatut Tasnim
- Molecular Plant Physiology Laboratory, Department of Botany, University of Rajshahi, Rajshahi, 6205, Bangladesh
| | - Ahmed M El-Shehawi
- Department of Biotechnology, College of Science, Taif University, P.O. Box 11099, Taif, 21944, Saudi Arabia
| | - Md Atikur Rahman
- Grassland and Forage Division, National Institute of Animal Science, Cheonan31000, Republic of Korea
| | - Md Sarwar Parvez
- Molecular Plant Physiology Laboratory, Department of Botany, University of Rajshahi, Rajshahi, 6205, Bangladesh
| | - Md Bulbul Ahmed
- Institut de Recherche en Biologie Végétale (IRBV), University of Montreal, Montréal, Québec, H1X 2B2, Canada
| | - Ahmad Humayan Kabir
- Molecular Plant Physiology Laboratory, Department of Botany, University of Rajshahi, Rajshahi, 6205, Bangladesh.
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The fate of plant growth-promoting rhizobacteria in soilless agriculture: future perspectives. 3 Biotech 2021; 11:382. [PMID: 34350087 DOI: 10.1007/s13205-021-02941-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2021] [Accepted: 07/22/2021] [Indexed: 02/07/2023] Open
Abstract
The application of plant growth-promoting rhizobacteria (PGPRs) can be an excellent and eco-friendly alternative to the use of chemical fertilizers. While PGPRs are often used in traditional agriculture to facilitate yield increases, their use in soilless agriculture has been limited. Soilless agriculture is growing in popularity among commercial farmers because it eliminates soil-borne problems, and the essential strategy is to keep the system as clean as possible. However, a new trend is the inclusion of PGPRs to enhance plant development. Despite the plethora of research that has been performed to date, there remains a huge knowledge gap that needs to be addressed to facilitate the commercialization of PGPRs for sustainable soilless agriculture. Hence, the development of proper strategies and additional research and trials are required. The present review provides an update on recent developments in the use of PGPRs in soilless agriculture, examining these bacteria from different perspectives in an attempt to generate critical discussion and aid in the understanding of the interaction between soilless agriculture and PGPRs.
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Insights into the Interactions among Roots, Rhizosphere, and Rhizobacteria for Improving Plant Growth and Tolerance to Abiotic Stresses: A Review. Cells 2021; 10:cells10061551. [PMID: 34205352 PMCID: PMC8234610 DOI: 10.3390/cells10061551] [Citation(s) in RCA: 70] [Impact Index Per Article: 23.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2021] [Revised: 06/16/2021] [Accepted: 06/17/2021] [Indexed: 01/21/2023] Open
Abstract
Abiotic stresses, such as drought, salinity, heavy metals, variations in temperature, and ultraviolet (UV) radiation, are antagonistic to plant growth and development, resulting in an overall decrease in plant yield. These stresses have direct effects on the rhizosphere, thus severely affect the root growth, and thereby affecting the overall plant growth, health, and productivity. However, the growth-promoting rhizobacteria that colonize the rhizosphere/endorhizosphere protect the roots from the adverse effects of abiotic stress and facilitate plant growth by various direct and indirect mechanisms. In the rhizosphere, plants are constantly interacting with thousands of these microorganisms, yet it is not very clear when and how these complex root, rhizosphere, and rhizobacteria interactions occur under abiotic stresses. Therefore, the present review attempts to focus on root–rhizosphere and rhizobacterial interactions under stresses, how roots respond to these interactions, and the role of rhizobacteria under these stresses. Further, the review focuses on the underlying mechanisms employed by rhizobacteria for improving root architecture and plant tolerance to abiotic stresses.
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Haider FU, Liqun C, Coulter JA, Cheema SA, Wu J, Zhang R, Wenjun M, Farooq M. Cadmium toxicity in plants: Impacts and remediation strategies. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2021; 211:111887. [PMID: 33450535 DOI: 10.1016/j.ecoenv.2020.111887] [Citation(s) in RCA: 464] [Impact Index Per Article: 154.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/24/2020] [Revised: 12/21/2020] [Accepted: 12/30/2020] [Indexed: 05/02/2023]
Abstract
Cadmium (Cd) is an unessential trace element in plants that is ubiquitous in the environment. Anthropogenic activities such as disposal of urban refuse, smelting, mining, metal manufacturing, and application of synthetic phosphate fertilizers enhance the concentration of Cd in the environment and are carcinogenic to human health. In this manuscript, we reviewed the sources of Cd contamination to the environment, soil factors affecting the Cd uptake, the dynamics of Cd in the soil rhizosphere, uptake mechanisms, translocation, and toxicity of Cd in plants. In crop plants, the toxicity of Cd reduces uptake and translocation of nutrients and water, increases oxidative damage, disrupts plant metabolism, and inhibits plant morphology and physiology. In addition, the defense mechanism in plants against Cd toxicity and potential remediation strategies, including the use of biochar, minerals nutrients, compost, organic manure, growth regulators, and hormones, and application of phytoremediation, bioremediation, and chemical methods are also highlighted in this review. This manuscript may help to determine the ecological importance of Cd stress in interdisciplinary studies and essential remediation strategies to overcome the contamination of Cd in agricultural soils.
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Affiliation(s)
- Fasih Ullah Haider
- College of Resources and Environmental Sciences, Gansu Agricultural University, Lanzhou 730070, China; Gansu Provincial Key Laboratory of Aridland Crop Science, Gansu Agricultural University, Lanzhou 730070, China
| | - Cai Liqun
- College of Resources and Environmental Sciences, Gansu Agricultural University, Lanzhou 730070, China; Gansu Provincial Key Laboratory of Aridland Crop Science, Gansu Agricultural University, Lanzhou 730070, China.
| | - Jeffrey A Coulter
- Department of Agronomy and Plant Genetics, University of Minnesota, St. Paul, MN 55108, USA
| | - Sardar Alam Cheema
- Department of Agronomy, University of Agriculture, Faisalabad 38040, Pakistan
| | - Jun Wu
- College of Resources and Environmental Sciences, Gansu Agricultural University, Lanzhou 730070, China; Gansu Provincial Key Laboratory of Aridland Crop Science, Gansu Agricultural University, Lanzhou 730070, China
| | - Renzhi Zhang
- College of Resources and Environmental Sciences, Gansu Agricultural University, Lanzhou 730070, China; Gansu Provincial Key Laboratory of Aridland Crop Science, Gansu Agricultural University, Lanzhou 730070, China
| | - Ma Wenjun
- College of Resources and Environmental Sciences, Gansu Agricultural University, Lanzhou 730070, China; Gansu Provincial Key Laboratory of Aridland Crop Science, Gansu Agricultural University, Lanzhou 730070, China
| | - Muhammad Farooq
- Department of Agronomy, University of Agriculture, Faisalabad 38040, Pakistan; Department of Plant Sciences, College of Agricultural and Marine Sciences, Sultan Qaboos University, Al-Khoud 123, Oman.
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Abdel Latef AAH, Zaid A, Abo-Baker ABAE, Salem W, Abu Alhmad MF. Mitigation of Copper Stress in Maize by Inoculation with Paenibacillus polymyxa and Bacillus circulans. PLANTS 2020; 9:plants9111513. [PMID: 33171623 PMCID: PMC7695152 DOI: 10.3390/plants9111513] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/15/2020] [Revised: 10/31/2020] [Accepted: 11/06/2020] [Indexed: 01/24/2023]
Abstract
Copper (Cu) is a micronutrient that assumes a principal role in plant growth and development. However, its excess concentration in soil is imperiling crop productivity. Inoculation with different bacterial strains in cereals could modify growth traits, photosynthetic effectiveness, and generation of strong antioxidant defense systems to make them more tolerant of Cu stress. Therefore, a pot study was designed to test plant growth-promoting rhizobacteria (PGPR) including Paenibacillus polymyxa and Bacillus circulans to Cu exposed maize (Zea mays L.) plants. Increasing Cu (100 to 500 µM of CuSO4) concentration decreased growth traits, photosynthetic pigments, soluble sugars, phosphorous (P) and potassium (K) contents, and the activity of catalase (CAT) but increased proline and malondialdehyde (MDA) content, the activity of peroxidase (POD) and Cu ions at root and shoot level. Moreover, the bacterial treatment also modulated the antioxidant capability in stress-free plants. Nevertheless, inoculation with P. polymyxa and B. circulans alleviated Cu-induced growth, photosynthetic pigments and mineral nutrient (P and K) on one hand and regulating the pools of osmolytes and antioxidant enzymes, whilst simultaneously reducing MDA and Cu root and shoot contents. These improved activities of antioxidant enzymes and the regulation of osmolytes content elicited by the blend of bacterial inoculation would have retained the ability of maize plants to confer resilience to Cu stress. This study further affirms that the application of two specific bacterial strains to maize plants proved very effective to ameliorate the Cu toxicity.
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Affiliation(s)
- Arafat Abdel Hamed Abdel Latef
- Biology Department, Turabah University College, Turabah Branch, Taif University, P.O. Box 11099, Taif 21944, Saudi Arabia
- Botany and Microbiology Department, Faculty of Science, South Valley University, Qena 83523, Egypt; (W.S.); (M.F.A.A.)
- Correspondence: or or
| | - Abbu Zaid
- Plant Physiology and Biochemistry Section, Department of Botany, Aligarh Muslim University, Aligarh 202002, India;
| | | | - Wesam Salem
- Botany and Microbiology Department, Faculty of Science, South Valley University, Qena 83523, Egypt; (W.S.); (M.F.A.A.)
| | - Mona Fawzy Abu Alhmad
- Botany and Microbiology Department, Faculty of Science, South Valley University, Qena 83523, Egypt; (W.S.); (M.F.A.A.)
- Biology Department, Faculty of Science, Taif University, Al-Hawiyah, Taif 21944, Saudi Arabia
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