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Peng Y, Song H, Jin T, Yang R, Shi J. Distribution characteristics of potentially toxic metal(loid)s in the soil and in tea plant (Camellia sinensis). Sci Rep 2024; 14:14741. [PMID: 38926601 DOI: 10.1038/s41598-024-65674-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2024] [Accepted: 06/24/2024] [Indexed: 06/28/2024] Open
Abstract
Potentially toxic metal(loid) assessment of tea and tea garden soil is a vital guarantee of tea safety and is very necessary. This study analyzed the distribution of seven potentially toxic metal(loid)s in different organs of the tea plants and soil at various depths in the Yangai tea farm of Guiyang City, Guizhou Province, China. Although soil potentially toxic metal(loid) in the study area is safe, there should be attention to the health risks of Cu, Ni, As, and Pb in the later stages of tea garden management. Soil As and Pb are primarily from anthropogenic sources, soil Zn is mainly affected by natural sources and human activities, and soil with other potentially toxic metal(loid) is predominantly from natural sources. Tea plants might be the enrichment of Zn and the exclusion or tolerance of As, Cu, Ni, and Pb. The tea plant has a strong ability for absorbing Cd and preferentially storing it in its roots, stems, and mature leaves. Although the Cd and other potentially toxic metal(loid)s content of tea in Guizhou Province is generally within the range of edible safety, with the increase of tea planting years, it is essential to take corresponding measures to prevent the potential health risks of Cd and other potentially toxic metal(loid)s in tea.
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Affiliation(s)
- Yishu Peng
- College of Tea Science, Guizhou University, Huaxi District, Guiyang, 550025, Guizhou, People's Republic of China.
- College of Resources and Environmental Engineering, Guizhou University, Huaxi District, Guiyang, 550025, Guizhou, People's Republic of China.
| | - Haijie Song
- College of Tea Science, Guizhou University, Huaxi District, Guiyang, 550025, Guizhou, People's Republic of China
| | - Tao Jin
- Institute of Mountain Resources of Guizhou Province, Guizhou Academy of Sciences, Guiyang, 550001, People's Republic of China
| | - Ruidong Yang
- College of Resources and Environmental Engineering, Guizhou University, Huaxi District, Guiyang, 550025, Guizhou, People's Republic of China.
| | - Jing Shi
- College of Tea Science, Guizhou University, Huaxi District, Guiyang, 550025, Guizhou, People's Republic of China
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Yang W, Dai H, Wei S, Skuza L. The effect of exogenous plant growth regulators on elevated Cd phytoremediation by Solanum nigrum L. in contaminated soil. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:3964-3975. [PMID: 38097832 DOI: 10.1007/s11356-023-31420-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2023] [Accepted: 12/04/2023] [Indexed: 01/19/2024]
Abstract
Maximizing amendment potential is an emphasis in the HM-contaminated field of phytoremediation by hyperaccumulators due to the low bioavailability of HMs in soils and small biomass yields of plants. This study investigated the influence of different types and concentrations of plant growth regulators on Cd phytoremediation by Solanum nigrum in contaminated soil. Our conclusions showed that the shoot Cd extractions (μg plant-1) and the root and shoot biomasses at all the treatments remarkedly increased compared with that of the CK (p < 0.05), while the Cd concentrations at root and aboveground parts by S. nigrum, the extractable Cd concentrations, and pH value of soils did not change significantly compared with the CK (p < 0.05). Furthermore, correlation analysis showed that the shoot Cd phytoaccumulation and the root and aboveground biomasses of S. nigrum were particularly dependent upon the application of CTK and GA3 concentration gradient (p < 0.05). Moreover, some related physicochemical indexes were determined for supervising the growth conditions of plants, and these results pointed out that after exogenous PGRs treatments, the chlorophyll content and antioxidative enzymes POD and SOD activities in vivo of plants clearly advanced, while the H2O2 and MDA contents and CAT apparently declined. These consequence demonstrated that the exogenous PGR addition prominently reinforced the Cd phytoextraction capacity of S. nigrum in contaminated soil by stimulating plant growth and increasing shoot yields.
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Affiliation(s)
- Wei Yang
- Academy of Environmental and Chemical Engineering, Shenyang Ligong University, Shenyang, 110159, Liaoning, China
| | - Huiping Dai
- College of Biological Science & Engineering, Shaanxi Province Key Laboratory of Bio-Resources, Shaanxi University of Technology, Hanzhong, 723001, China
| | - Shuhe Wei
- Key Laboratory of Pollution Ecology and Environment Engineering, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, 110016, China.
| | - Lidia Skuza
- Department of Molecular Biology and Cytology, Institute for Research On Biodiversity, University of Szczecin, 71-415, Szczecin, Poland
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Ju XY, Gan S, Yang KX, Xu QB, Dai WW, Yangchen YT, Zhang J, Wang YN, Li RP, Yuan B. Characterization of a Novel Polysaccharide Derived from Rhizospheric Paecilomyces vaniformisi and Its Mechanism for Enhancing Salinity Resistance in Rice Seedlings. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2023; 71:20585-20601. [PMID: 38101321 DOI: 10.1021/acs.jafc.3c05430] [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: 12/17/2023]
Abstract
Soil salinity is an important limiting factor in agricultural production. Rhizospheric fungi can potentially enhance crop salinity tolerance, but the precise role of signaling substances is still to be systematically elucidated. A rhizospheric fungus identified as Paecilomyces vaniformisi was found to enhance the salinity tolerance of rice seedlings. In this study, a novel polysaccharide (PPL2b) was isolated from P. vaniformisi and identified as consisting of Manp, Glcp, GalpA, and Galp. In a further study, PPL2b showed significant activity in alleviating salinity stress-induced growth inhibition in rice seedlings. The results indicated that under salinity stress, PPL2b enhances seed germination, plant growth (height and biomass), and biochemical parameters (soluble sugar and protein contents). Additionally, PPL2b regulates genes such as SOS1 and SKOR to decrease K+ efflux and increase Na+ efflux. PPL2b increased the expression and activity of genes related to antioxidant enzymes and nonenzyme substances in salinity-induced oxidative stress. Further study indicated that PPL2b plays a crucial role in regulating osmotic substances, such as proline and betaine, in maintaining the osmotic balance. It also modulates plant hormones to promote rice seedling growth and enhance their tolerance to soil salinity. The variables interacted and were divided into two groups (PC1 77.39% and PC2 18.77%) based on their relative values. Therefore, these findings indicate that PPL2b from P. vaniformisi can alleviate the inhibitory effects of salinity stress on root development, osmotic adjustment, ion balance, oxidative stress balance, and growth of rice seedlings. Furthermore, it suggests that polysaccharides produced by rhizospheric fungi could be utilized to enhance crop tolerance to salinity.
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Affiliation(s)
- Xiu-Yun Ju
- School of Life Science, Jiangsu Normal University, Xuzhou 221116, China
| | - Shu Gan
- School of Life Science, Jiangsu Normal University, Xuzhou 221116, China
| | - Ke-Xin Yang
- School of Life Science, Jiangsu Normal University, Xuzhou 221116, China
| | - Quan-Bin Xu
- School of Life Science, Jiangsu Normal University, Xuzhou 221116, China
| | - Wei-Wei Dai
- School of Life Science, Jiangsu Normal University, Xuzhou 221116, China
| | | | - Jie Zhang
- School of Life Science, Jiangsu Normal University, Xuzhou 221116, China
| | - Yue-Nan Wang
- School of Life Science, Jiangsu Normal University, Xuzhou 221116, China
| | - Rong-Peng Li
- School of Life Science, Jiangsu Normal University, Xuzhou 221116, China
| | - Bo Yuan
- School of Life Science, Jiangsu Normal University, Xuzhou 221116, China
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Feng D, Wang R, Sun X, Liu L, Liu P, Tang J, Zhang C, Liu H. Heavy metal stress in plants: Ways to alleviate with exogenous substances. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 897:165397. [PMID: 37429478 DOI: 10.1016/j.scitotenv.2023.165397] [Citation(s) in RCA: 16] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2023] [Revised: 07/05/2023] [Accepted: 07/06/2023] [Indexed: 07/12/2023]
Abstract
Accumulation and enrichment of excessive heavy metals due to industrialization and modernization not only devastate our ecosystem, but also pose a threat to the global vegetation, especially crops. To improve plant resilience against heavy metal stress (HMS), numerous exogenous substances (ESs) have been tried as the alleviating agents. After a careful and thorough review of over 150 recently published literature, 93 reported ESs and their corresponding effects on alleviating HMS, we propose that 7 underlying mechanisms of ESs be categorized in plants for: 1) improving the capacity of the antioxidant system, 2) inducing the synthesis of osmoregulatory substances, 3) enhancing the photochemical system, 4) detouring the accumulation and migration of heavy metals, 5) regulating the secretion of endogenous hormones, 6) modulating gene expressions, and 7) participating in microbe-involved regulations. Recent research advances strongly indicate that ESs have proven to be effective in mitigating a potential negative impact of HMS on crops and other plants, but not enough to ultimately solve the devastating problem associated with excessive heavy metals. Therefore, much more research should be focused and carried out to eliminate HMS for the sustainable agriculture and clean environmental through minimizing towards prohibiting heavy metals from entering our ecosystem, phytodetoxicating polluted landscapes, retrieving heavy metals from detoxicating plants or crop, breeding for more tolerant cultivars for both high yield and tolerance against HMS, and seeking synergetic effect of multiply ESs on HMS alleviation in our feature researches.
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Affiliation(s)
- Di Feng
- Weifang University of Science and Technology/Shandong Facility Horticulture Bioengineering Research Center, Weifang 262700, Shandong, China
| | - Rongxue Wang
- Weifang University of Science and Technology/Shandong Facility Horticulture Bioengineering Research Center, Weifang 262700, Shandong, China
| | - Xiaoan Sun
- Weifang University of Science and Technology/Shandong Facility Horticulture Bioengineering Research Center, Weifang 262700, Shandong, China
| | - Li'nan Liu
- MOE Key Laboratory of Pollution Processes and Environmental Criteria/Tianjin Engineering Center of Environmental Diagnosis and Contamination Remediation, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
| | - Ping Liu
- Weifang University of Science and Technology/Shandong Facility Horticulture Bioengineering Research Center, Weifang 262700, Shandong, China
| | - Jingchun Tang
- MOE Key Laboratory of Pollution Processes and Environmental Criteria/Tianjin Engineering Center of Environmental Diagnosis and Contamination Remediation, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
| | - Chenxi Zhang
- Weifang University of Science and Technology/Shandong Facility Horticulture Bioengineering Research Center, Weifang 262700, Shandong, China.
| | - Hao Liu
- Key Laboratory of Crop Water Requirement and Regulation of the Ministry of Agriculture and Rural Affairs/Farmland Irrigation Research Institute, Chinese Academy of Agricultural Sciences, Xinxiang 453003, Henan, China.
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Li Y, Chen Y, Chen J, Shen C. Flavonoid metabolites in tea plant (Camellia sinensis) stress response: Insights from bibliometric analysis. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2023; 202:107934. [PMID: 37572493 DOI: 10.1016/j.plaphy.2023.107934] [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: 04/13/2023] [Revised: 07/21/2023] [Accepted: 08/02/2023] [Indexed: 08/14/2023]
Abstract
In the context of global climate change, tea plants are at risk from elevating environmental stress factors. Coping with this problem relies upon the understanding of tea plant stress response and its underlying mechanisms. Over the past two decades, research in this field has prospered with the contributions of scientists worldwide. Aiming in providing a comprehensive perspective of the research field related to tea plant stress response, we present a bibliometric analysis of the this area. Our results demonstrate the most studied stresses, global contribution, authorship and collaboration, and trending research topics. We highlight the importance of flavonoid metabolites in tea plant stress response, particularly their role in maintaining redox homeostasis, yield, and adjusting tea quality under stress conditions. Further research on the flavonoid response under various stress conditions can promote the development of cultivation measures, thereby improving stress resistance and tea quality.
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Affiliation(s)
- YunFei Li
- Key Laboratory of Tea Science of Ministry of Education, Hunan Agricultural University, Changsha, 410128, China; National Research Center of Engineering & Technology for Utilization of Functional Ingredients from Botanicals, Hunan Agricultural University, Changsha, 410128, China
| | - YiQin Chen
- Key Laboratory of Tea Science of Ministry of Education, Hunan Agricultural University, Changsha, 410128, China; National Research Center of Engineering & Technology for Utilization of Functional Ingredients from Botanicals, Hunan Agricultural University, Changsha, 410128, China
| | - JiaHao Chen
- Key Laboratory of Tea Science of Ministry of Education, Hunan Agricultural University, Changsha, 410128, China; National Research Center of Engineering & Technology for Utilization of Functional Ingredients from Botanicals, Hunan Agricultural University, Changsha, 410128, China
| | - ChengWen Shen
- Key Laboratory of Tea Science of Ministry of Education, Hunan Agricultural University, Changsha, 410128, China; National Research Center of Engineering & Technology for Utilization of Functional Ingredients from Botanicals, Hunan Agricultural University, Changsha, 410128, China; Co-Innovation Center of Education Ministry for Utilization of Botanical Functional Ingredients, Hunan Agricultural University, Changsha, 410128, China; Key Laboratory for Evaluation and Utilization of Gene Resources of Horticultural Crops, Ministry of Agriculture and Rural Affairs of China, Hunan Agricultural University, Changsha, 410128, China.
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6
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Šípošová K, Labancová E, Hačkuličová D, Kollárová K, Vivodová Z. The changes in the maize root cell walls after exogenous application of auxin in the presence of cadmium. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:87102-87117. [PMID: 37418187 PMCID: PMC10406670 DOI: 10.1007/s11356-023-28029-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2022] [Accepted: 05/28/2023] [Indexed: 07/08/2023]
Abstract
Cadmium (Cd) is a transition metal and hazardous pollutant that has many toxic effects on plants. This heavy metal poses a health risk for both humans and animals. The cell wall is the first structure of a plant cell that is in contact with Cd; therefore, it can change its composition and/or ratio of wall components accordingly. This paper investigates the changes in the anatomy and cell wall architecture of maize (Zea mays L.) roots grown for 10 days in the presence of auxin indole-3-butyric acid (IBA) and Cd. The application of IBA in the concentration 10-9 M delayed the development of apoplastic barriers, decreased the content of lignin in the cell wall, increased the content of Ca2+ and phenols, and influenced the composition of monosaccharides in polysaccharide fractions when compared to the Cd treatment. Application of IBA improved the Cd2+ fixation to the cell wall and increased the endogenous concentration of auxin depleted by Cd treatment. The proposed scheme from obtained results may explain the possible mechanisms of the exogenously applied IBA and its effects on the changes in the binding of Cd2+ within the cell wall, and on the stimulation of growth that resulted in the amelioration of Cd stress.
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Affiliation(s)
- Kristína Šípošová
- Institute of Chemistry, Slovak Academy of Sciences, Dúbravská cesta 9, 845 38, Bratislava, Slovakia
| | - Eva Labancová
- Institute of Chemistry, Slovak Academy of Sciences, Dúbravská cesta 9, 845 38, Bratislava, Slovakia
| | - Diana Hačkuličová
- Institute of Chemistry, Slovak Academy of Sciences, Dúbravská cesta 9, 845 38, Bratislava, Slovakia
| | - Karin Kollárová
- Institute of Chemistry, Slovak Academy of Sciences, Dúbravská cesta 9, 845 38, Bratislava, Slovakia
| | - Zuzana Vivodová
- Institute of Chemistry, Slovak Academy of Sciences, Dúbravská cesta 9, 845 38, Bratislava, Slovakia.
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Wei T, Gao H, An F, Ma X, Hua L, Guo J. Performance of heavy metal-immobilizing bacteria combined with biochar on remediation of cadmium and lead co-contaminated soil. ENVIRONMENTAL GEOCHEMISTRY AND HEALTH 2023; 45:6009-6026. [PMID: 37204552 DOI: 10.1007/s10653-023-01605-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Accepted: 05/02/2023] [Indexed: 05/20/2023]
Abstract
Heavy metal pollution of soil has become a public concern worldwide since it threats food safety and human health. Sustainable and environmental-friendly remediation technology is urgently needed. Therefore, we investigated the properties and heavy metal removal ability of Enterobacter asburiae G3 (G3), Enterobacter tabaci I12 (I12), and explored the feasibility of remediation Cd, Pb co-contaminated soil by the combination of G3/I12 and biochar. Our results indicated that both strains are highly resistant to Cd, Pb and maintain plant growth-promoting properties. The removal efficiency of G3 for Cd and Pb were 76.79-99.43%, respectively, while the removal efficiency of I12 for Cd and Pb were 62.57-99.55%, respectively. SEM-EDS and XRD analysis revealed that the morphological and structural changes occurred upon heavy metal exposure, metal precipitates were also detected on cell surface. FTIR analysis indicated that functional groups (-OH, -N-H, -C = O, -C-N, -PO4) were involved in Cd/Pb immobilization. Application of the bacteria, biochar, or their combination decreased the acid-extractable Cd, Pb in soil while increased the residual fractions, meanwhile, the bioavailability of both metal elements declined. Besides, these treatments increased soil enzyme (sucrase, catalase and urease) activity and accelerated pakchoi growth, heavy metal accumulation in pakchoi was depressed upon bacteria and/or biochar application, and a synergistic effect was detected when applying bacteria and biochar together. In BC + G3 and BC + I12 treated plants, the Cd and Pb accumulation decreased by 24.42% and 52.19%, 17.55% and 47.36%, respectively. Overall, our study provides an eco-friendly and promising in situ technology that could be applied in heavy metal remediation.
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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
| | - Han Gao
- School of Environmental Science and Engineering, Shaanxi University of Science & Technology, Xi'an, 710021, People's Republic of China
| | - Fengqiu An
- College of Environmental and Chemical Engineering, Xi'an Polytechnic University, Xi'an, 710048, Shaanxi, China
| | - Xiulian Ma
- 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
| | - Junkang Guo
- School of Environmental Science and Engineering, Shaanxi University of Science & Technology, Xi'an, 710021, People's Republic of China.
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Loganathan P, Sun W, He Z. Optimization and Production of Exopolysaccharides (EPS) and Indole-3-Acetic Acid (IAA) Under Chromium by Halophilic Bacteria Oceanobacillus oncorhynchi W4. Mol Biotechnol 2023:10.1007/s12033-023-00785-0. [PMID: 37442921 DOI: 10.1007/s12033-023-00785-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2023] [Accepted: 05/29/2023] [Indexed: 07/15/2023]
Abstract
The current study assessed the levels of exopolysaccharides (EPS) and indole-3-acetic acid (IAA) and the impacts of halophilic bacteria Oceanobacillus oncorhynchi W4 under Cr (VI). The effects of W4 were tested for its ability to remove Cr (VI) at several concentrations, the removal rate was reached after 48 h at 58.4%, 53.3%, 49.2%, and 43.1%). After 12-48 h, the maximum removal rate of 29-58% was found at an initial concentration of 50 mg/L (Cr (VI)). The Box-Behnken design based on response surface methodology was utilized to optimize the EPS, including pH, sucrose concentration, and incubation period. The highest EPS yield (314.5 mg/L) was obtained under 96 h at pH 7.0, with 5% sucrose concentration. The strain Oceanobacillus oncorhynchi W4 was tested for its ability to create EPS at various concentrations of Cr (VI). After 96 h, it generated the maximum amount of EPS (216.3 mg/L) at a concentration of 50 mg/L. By using FT-IR spectrum measurements, it was confirmed that hexavalent chromium and EPS had surface chemical interactions. At various Cr (VI) concentrations, the isolate W4 was tested for its ability to secrete Indole-3 acetic acid. IAA secretion (control) without Cr (VI) achieved a maximum of 1.45 mg/ml at 120 h. At 200 mg/L Cr (VI) concentration, 1.65 mg/ml of IAA was also produced after 48 h. According to the findings, Oceanobacillus oncorhynchi W4 was a promising isolate in a stressful environment.
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Affiliation(s)
- Praburaman Loganathan
- School of Minerals Processing and Bioengineering, Central South University, Changsha, 410083, China
- Department of Research, Meenakshi Academy of Higher Education and Research, Chennai-600078, India
| | - Wei Sun
- School of Minerals Processing and Bioengineering, Central South University, Changsha, 410083, China
| | - Zhiguo He
- School of Minerals Processing and Bioengineering, Central South University, Changsha, 410083, China.
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Campos EVR, Pereira ADES, Aleksieienko I, do Carmo GC, Gohari G, Santaella C, Fraceto LF, Oliveira HC. Encapsulated plant growth regulators and associative microorganisms: Nature-based solutions to mitigate the effects of climate change on plants. PLANT SCIENCE : AN INTERNATIONAL JOURNAL OF EXPERIMENTAL PLANT BIOLOGY 2023; 331:111688. [PMID: 36963636 DOI: 10.1016/j.plantsci.2023.111688] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Revised: 03/16/2023] [Accepted: 03/19/2023] [Indexed: 06/18/2023]
Abstract
Over the past decades, the atmospheric CO2 concentration and global average temperature have been increasing, and this trend is projected to soon become more severe. This scenario of climate change intensifies abiotic stress factors (such as drought, flooding, salinity, and ultraviolet radiation) that threaten forest and associated ecosystems as well as crop production. These factors can negatively affect plant growth and development with a consequent reduction in plant biomass accumulation and yield, in addition to increasing plant susceptibility to biotic stresses. Recently, biostimulants have become a hotspot as an effective and sustainable alternative to alleviate the negative effects of stresses on plants. However, the majority of biostimulants have poor stability under environmental conditions, which leads to premature degradation, shortening their biological activity. To solve these bottlenecks, micro- and nano-based formulations containing biostimulant molecules and/or microorganisms are gaining attention, as they demonstrate several advantages over their conventional formulations. In this review, we focus on the encapsulation of plant growth regulators and plant associative microorganisms as a strategy to boost their application for plant protection against abiotic stresses. We also address the potential limitations and challenges faced for the implementation of this technology, as well as possibilities regarding future research.
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Affiliation(s)
- Estefânia V R Campos
- Institute of Science and Technology of Sorocaba, São Paulo State University (UNESP), Av. Três de Março 511, 18087-180 Sorocaba, São Paulo, Brazil; B.Nano Soluções Tecnológicas Ltda, Rua Dr. Júlio Prestes, 355,18230-000 São Miguel Arcanjo, São Paulo, Brazil.
| | - Anderson do E S Pereira
- Institute of Science and Technology of Sorocaba, São Paulo State University (UNESP), Av. Três de Março 511, 18087-180 Sorocaba, São Paulo, Brazil; B.Nano Soluções Tecnológicas Ltda, Rua Dr. Júlio Prestes, 355,18230-000 São Miguel Arcanjo, São Paulo, Brazil
| | - Ivan Aleksieienko
- Aix Marseille University, CEA, CNRS, BIAM, LEMiRE, Microbial Ecology of the Rhizosphere, ECCOREV FR 3098, F-13108 Saint Paul Lez Durance, France
| | - Giovanna C do Carmo
- Department of Animal and Plant Biology, State University of Londrina (UEL), PR 445, Km 380, 86057-970 Londrina, Paraná, Brazil
| | - Gholamreza Gohari
- Department of Horticultural Science, Faculty of Agriculture, University of Maragheh, Maragheh, Iran
| | - Catherine Santaella
- Aix Marseille University, CEA, CNRS, BIAM, LEMiRE, Microbial Ecology of the Rhizosphere, ECCOREV FR 3098, F-13108 Saint Paul Lez Durance, France
| | - Leonardo F Fraceto
- Institute of Science and Technology of Sorocaba, São Paulo State University (UNESP), Av. Três de Março 511, 18087-180 Sorocaba, São Paulo, Brazil
| | - Halley C Oliveira
- Department of Animal and Plant Biology, State University of Londrina (UEL), PR 445, Km 380, 86057-970 Londrina, Paraná, Brazil.
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Niu T, Zhang J, Li J, Gao X, Ma H, Gao Y, Chang Y, Xie J. Effects of exogenous glycine betaine and cycloleucine on photosynthetic capacity, amino acid composition, and hormone metabolism in Solanum melongena L. Sci Rep 2023; 13:7626. [PMID: 37165051 PMCID: PMC10172174 DOI: 10.1038/s41598-023-34509-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2022] [Accepted: 05/03/2023] [Indexed: 05/12/2023] Open
Abstract
Although exogenous glycine betaine (GB) and cycloleucine (Cyc) have been reported to affect animal cell metabolism, their effects on plant growth and development have not been studied extensively. Different concentrations of exogenous glycine betaine (20, 40, and 60 mmol L-1) and cycloleucine (10, 20, and 40 mmol L-1), with 0 mmol L-1 as control, were used to investigate the effects of foliar spraying of betaine and cycloleucine on growth, photosynthesis, chlorophyll fluorescence, Calvin cycle pathway, abaxial leaf burr morphology, endogenous hormones, and amino acid content in eggplant. We found that 40 mmol L-1 glycine betaine had the best effect on plant growth and development; it increased the fresh and dry weight of plants, increased the density of abaxial leaf hairs, increased the net photosynthetic rate and Calvin cycle key enzyme activity of leaves, had an elevating effect on chlorophyll fluorescence parameters, increased endogenous indoleacetic acid (IAA) content and decreased abscisic acid (ABA) content, and increased glutamate, serine, aspartate, and phenylalanine contents. However, cycloleucine significantly inhibited plant growth; plant apical dominance disappeared, plant height and dry and fresh weights decreased significantly, the development of abaxial leaf hairs was hindered, the net photosynthetic rate and Calvin cycle key enzyme activities were inhibited, the endogenous hormones IAA and ABA content decreased, and the conversion and utilization of glutamate, arginine, threonine, and glycine were affected. Combined with the experimental results and plant growth phenotypes, 20 mmol L-1 cycloleucine significantly inhibited plant growth. In conclusion, 40 mmol L-1 glycine betaine and 20 mmol L-1 cycloleucine had different regulatory effects on plant growth and development.
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Affiliation(s)
- Tianhang Niu
- College of Horticulture, Gansu Agricultural University, Yingmen Village, Anning District, Lanzhou, 730070, China
| | - Jing Zhang
- College of Horticulture, Gansu Agricultural University, Yingmen Village, Anning District, Lanzhou, 730070, China
| | - Jing Li
- College of Horticulture, Gansu Agricultural University, Yingmen Village, Anning District, Lanzhou, 730070, China
| | - Xiaoping Gao
- College of Horticulture, Gansu Agricultural University, Yingmen Village, Anning District, Lanzhou, 730070, China
| | - Hongyan Ma
- Lanzhou New Area Agricultural Science and Technology Development Co., Ltd., Lanzhou, 730000, China
| | - Yanqiang Gao
- College of Horticulture, Gansu Agricultural University, Yingmen Village, Anning District, Lanzhou, 730070, China
| | - Youlin Chang
- College of Horticulture, Gansu Agricultural University, Yingmen Village, Anning District, Lanzhou, 730070, China
| | - Jianming Xie
- College of Horticulture, Gansu Agricultural University, Yingmen Village, Anning District, Lanzhou, 730070, China.
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Liu S, Peng X, Wang X, Zhuang W. Transcriptome Analysis Reveals Differentially Expressed Genes Involved in Cadmium and Arsenic Accumulation in Tea Plant ( Camellia sinensis). PLANTS (BASEL, SWITZERLAND) 2023; 12:1182. [PMID: 36904042 PMCID: PMC10007383 DOI: 10.3390/plants12051182] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/02/2023] [Revised: 03/02/2023] [Accepted: 03/03/2023] [Indexed: 06/18/2023]
Abstract
Tea (Camellia sinensis) is the second most consumed drink in the world. Rapid industrialization has caused various impacts on nature and increased pollution by heavy metals. However, the molecular mechanisms of cadmium (Cd) and arsenic (As) tolerance and accumulation in tea plants are poorly understood. The present study focused on the effects of heavy metals Cd and As on tea plants. Transcriptomic regulation of tea roots after Cd and As exposure was analyzed to explore the candidate genes involved in Cd and As tolerance and accumulation. In total, 2087, 1029, 1707, and 366 differentially expressed genes (DEGs) were obtained in Cd1 (with Cd treatment for 10 days) vs. CK (without Cd treatment), Cd2 (with Cd treatment for 15 days) vs. CK, As1 (with As treatment for 10 days) vs. CK (without Cd treatment), and As2 (with As treatment for 15 days) vs. CK, respectively. Analysis of DEGs showed that a total of 45 DEGs with the same expression patterns were identified in four pairwise comparison groups. One ERF transcription factor (CSS0000647) and six structural genes (CSS0033791, CSS0050491, CSS0001107, CSS0019367, CSS0006162, and CSS0035212) were only increased at 15 d of Cd and As treatments. Using weighted gene co-expression network analysis (WGCNA) revealed that the transcription factor (CSS0000647) was positively correlated with five structural genes (CSS0001107, CSS0019367, CSS0006162, CSS0033791, and CSS0035212). Moreover, one gene (CSS0004428) was significantly upregulated in both Cd and As treatments, suggesting that these genes might play important roles in enhancing the tolerance to Cd and As stresses. These results provide candidate genes to enhance multi-metal tolerance through the genetic engineering technology.
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Affiliation(s)
- Shiqi Liu
- College of Tea Science, Guizhou University, Guiyang 550025, China
| | - Xuqian Peng
- College of Tea Science, Guizhou University, Guiyang 550025, China
| | - Xiaojing Wang
- College of Tea Science, Guizhou University, Guiyang 550025, China
| | - Weibing Zhuang
- Jiangsu Key Laboratory for the Research and Utilization of Plant Resources, Institute of Botany, Jiangsu Province and Chinese Academy of Sciences, Nanjing Botanical Garden Mem. Sun Yat-Sen, Nanjing 210014, China
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12
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Wu X, Zhang D, Wang F, Luo L, Chen Y, Lu S. Risk assessment of metal(loid)s in tea from seven producing provinces in China. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 856:159140. [PMID: 36191717 DOI: 10.1016/j.scitotenv.2022.159140] [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: 06/22/2022] [Revised: 09/24/2022] [Accepted: 09/27/2022] [Indexed: 06/16/2023]
Abstract
To evaluate metal(loid) contamination in tea leaves and assess health risks of tea drinking in China, metal(loid) concentrations in tea leaves from major tea-producing provinces were determined. Nine metal(loid)s (Al, Cr, Co, Ni, Cu, Zn, As, Cd and Pb) were measured in a total of 217 tea samples representing five tea varieties (black tea, dark tea, green tea, oolong tea and white tea) from seven major tea-producing provinces of China (Fujian, Guangdong, Henan, Hunan, Jiangsu, Yunnan and Zhejiang). The results indicated that tea samples from Hunan Province had the highest metal(loid) concentrations, likely due its high prevalence of heavy industrial activities and soil pollution. The concentrations of As and Pb in dark tea were markedly higher than those in other tea varieties. A strong Spearman correlation coefficient (0.78, P < 0.001) of As and Pb in all the tea varieties has also been found, indicating their similar sources. Human health risk assessment for the nine analyzed metal(loid)s indicated that co-exposure to these metal(loids) may not cause significant health risks (hazard index [HI] > 1 suggests considerable health risks). Among the five tea varieties, metal(loids)s in dark and green tea induced relatively higher health risks, with 90th percentile HI values approached 0.8. Co (53.6 %-84.5 %) and Al (3.33 %-15.8 %) made the highest contributions to the HI of the selected tea commodities. Thus, public and regulatory agencies should reduce excessive Co and Al accumulation in these tea varieties during cultivation and production processes.
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Affiliation(s)
- Xiaoling Wu
- School of Public Health (Shenzhen), Sun Yat-sen University, Shenzhen 518107, China
| | - Duo Zhang
- School of Public Health (Shenzhen), Sun Yat-sen University, Shenzhen 518107, China
| | - Fu Wang
- Longhua Center for Disease Control and Prevention, Shenzhen 518054, China
| | - Lan Luo
- Longhua Center for Disease Control and Prevention, Shenzhen 518054, China
| | - Yining Chen
- School of Public Health (Shenzhen), Sun Yat-sen University, Shenzhen 518107, China
| | - Shaoyou Lu
- School of Public Health (Shenzhen), Sun Yat-sen University, Shenzhen 518107, China.
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13
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Chen Y, Li Y, Shen C, Xiao L. Topics and trends in fresh tea ( Camellia sinensis) leaf research: A comprehensive bibliometric study. FRONTIERS IN PLANT SCIENCE 2023; 14:1092511. [PMID: 37089662 PMCID: PMC10118041 DOI: 10.3389/fpls.2023.1092511] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/08/2022] [Accepted: 03/23/2023] [Indexed: 05/03/2023]
Abstract
Tea plant (Camellia sinensis) is a widely cultivated cash crop and tea is a favorite functional food in the world. Fresh tea leaves (FTLs) play a critical role in bridging the two fields closely related to tea cultivation and tea processing, those are, tea plant biology and tea biochemistry. To provide a comprehensive overview of the development stages, authorship collaboration, research topics, and hotspots and their temporal evolution trends in the field of FTLs research, we conducted a bibliometric analysis, based on 971 publications on FTLs-related research published during 2001-2021 from Web of Science Core Collection. CiteSpace, R package Bibliometrix, and VOSviewer were employed in this research. The results revealed that the development history can be roughly divided into three stages, namely initial stage, slow development stage and rapid development stage. Journal of Agricultural & Food Chemistry published most articles in this field, while Frontiers in Plant Science held the highest total citations and h-index. The most influential country, institution, and author in this field was identified as China, the Chinese Academy of Agricultural Sciences, and Xiaochun Wan, respectively. FTLs-related research can be categorized into three main topics: the regulation mechanism of key genes, the metabolism and features of essential compounds, and tea plants' growth and stress responses. The most concerning hotspots are the application of advanced technologies, essential metabolites, leaf color variants, and effective cultivation treatments. There has been a shift from basic biochemical and enzymatic studies to studies of molecular mechanisms that depend on multi-omics technologies. We also discussed the future development in this field. This study provides a comprehensive summary of the research field, making it easier for researchers to be informed about its development history, status, and trends.
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Affiliation(s)
- YiQin Chen
- Key Laboratory of Tea Science of Ministry of Education, College of Horticulture, Hunan Agricultural University, Changsha, China
- National Research Center of Engineering and Technology for Utilization of Botanical Functional Ingredients, Changsha, China
- Co-Innovation Center of Education Ministry for Utilization of Botanical Functional Ingredients, Changsha, China
- Key Laboratory for Evaluation and Utilization of Gene Resources of Horticultural Crops, Ministry of Agriculture and Rural Affairs of China, Hunan Agricultural University, Changsha, China
| | - YunFei Li
- Key Laboratory of Tea Science of Ministry of Education, College of Horticulture, Hunan Agricultural University, Changsha, China
- National Research Center of Engineering and Technology for Utilization of Botanical Functional Ingredients, Changsha, China
- Co-Innovation Center of Education Ministry for Utilization of Botanical Functional Ingredients, Changsha, China
- Key Laboratory for Evaluation and Utilization of Gene Resources of Horticultural Crops, Ministry of Agriculture and Rural Affairs of China, Hunan Agricultural University, Changsha, China
| | - ChengWen Shen
- Key Laboratory of Tea Science of Ministry of Education, College of Horticulture, Hunan Agricultural University, Changsha, China
- National Research Center of Engineering and Technology for Utilization of Botanical Functional Ingredients, Changsha, China
- Co-Innovation Center of Education Ministry for Utilization of Botanical Functional Ingredients, Changsha, China
- Key Laboratory for Evaluation and Utilization of Gene Resources of Horticultural Crops, Ministry of Agriculture and Rural Affairs of China, Hunan Agricultural University, Changsha, China
- *Correspondence: Chengwen Shen, ; Lizheng Xiao,
| | - LiZheng Xiao
- Key Laboratory of Tea Science of Ministry of Education, College of Horticulture, Hunan Agricultural University, Changsha, China
- National Research Center of Engineering and Technology for Utilization of Botanical Functional Ingredients, Changsha, China
- Co-Innovation Center of Education Ministry for Utilization of Botanical Functional Ingredients, Changsha, China
- Key Laboratory for Evaluation and Utilization of Gene Resources of Horticultural Crops, Ministry of Agriculture and Rural Affairs of China, Hunan Agricultural University, Changsha, China
- *Correspondence: Chengwen Shen, ; Lizheng Xiao,
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Yin Z, Yu J, Han X, Wang H, Yang Q, Pan H, Lou Y, Zhuge Y. A novel phytoremediation technology for polluted cadmium soil: Salix integra treated with spermidine and activated carbon. CHEMOSPHERE 2022; 306:135582. [PMID: 35803376 DOI: 10.1016/j.chemosphere.2022.135582] [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: 06/05/2022] [Revised: 06/27/2022] [Accepted: 06/29/2022] [Indexed: 06/15/2023]
Abstract
A variety of plants have been used as phytoremediation materials to remove Cd from polluted soil. However, the disadvantages of using plants for decontamination include low biomass, low uptake, and inefficiency. We conducted experiments to determine the effects of spermidine and activated carbon treatments of Salix integra on Cd removal. The results showed that exogenous spermidine and activated carbon increased plant growth and root development compared with the CK. The increased dry mass (39.65-92.95%) with the combined spermidine and activated carbon treatments was higher than that with either single treatment (14.79-62.80%). The root length, surface area, root volume, and root diameter with the combined spermidine and activated carbon treatments (53.51-189.35%, 113.08-207.62%, 111.71-499.27%, and 32.51-106.62%, respectively) were higher than those of the lone application treatments (19.35-132.23%, 52.33-111.57%, 35.08-297.07%, and 24.22-81.38%, respectively). In addition, spermidine and activated carbon application reduced the toxicity of Cd to S. integra by improving the antioxidant capacity, thereby increasing the accumulation of Cd. The application of spermidine and activated carbon also changed the distribution of Cd in each part of S. integra. There was increased accumulation of Cd in the shoots and better absorption by the S. integra shoots, thereby improving their Cd remediation efficiency. The combined 0.8 mM spermidine and 0.5 g kg-1 activated carbon were most effective on removing Cd from the soil. The Cd removal efficiency was 78.11-120.86% higher than that of the CK. Our results may provide foundational information for understanding the mechanisms for the sustainable remediation of Cd-contaminated soil using a combination of spermidine and activated carbon.
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Affiliation(s)
- Zerun Yin
- National Engineering Research Center for Efficient Utilization of Soil and Fertilizer, College of Resources and Environment, Shandong Agricultural University, Taian, 271018, Shandong Province, China; Hunan Agricultural University, Changsha, 410125, Hunan Province, China
| | - Jinpeng Yu
- National Engineering Research Center for Efficient Utilization of Soil and Fertilizer, College of Resources and Environment, Shandong Agricultural University, Taian, 271018, Shandong Province, China
| | - Xinran Han
- Hunan Agricultural University, Changsha, 410125, Hunan Province, China
| | - Hui Wang
- National Engineering Research Center for Efficient Utilization of Soil and Fertilizer, College of Resources and Environment, Shandong Agricultural University, Taian, 271018, Shandong Province, China
| | - Quangang Yang
- National Engineering Research Center for Efficient Utilization of Soil and Fertilizer, College of Resources and Environment, Shandong Agricultural University, Taian, 271018, Shandong Province, China
| | - Hong Pan
- National Engineering Research Center for Efficient Utilization of Soil and Fertilizer, College of Resources and Environment, Shandong Agricultural University, Taian, 271018, Shandong Province, China
| | - Yanhong Lou
- National Engineering Research Center for Efficient Utilization of Soil and Fertilizer, College of Resources and Environment, Shandong Agricultural University, Taian, 271018, Shandong Province, China.
| | - Yuping Zhuge
- National Engineering Research Center for Efficient Utilization of Soil and Fertilizer, College of Resources and Environment, Shandong Agricultural University, Taian, 271018, Shandong Province, China.
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15
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Rolón-Cárdenas GA, Arvizu-Gómez JL, Soria-Guerra RE, Pacheco-Aguilar JR, Alatorre-Cobos F, Hernández-Morales A. The role of auxins and auxin-producing bacteria in the tolerance and accumulation of cadmium by plants. ENVIRONMENTAL GEOCHEMISTRY AND HEALTH 2022; 44:3743-3764. [PMID: 35022877 DOI: 10.1007/s10653-021-01179-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2021] [Accepted: 12/05/2021] [Indexed: 05/16/2023]
Abstract
Cadmium (Cd) is one of the most toxic heavy metals for plant physiology and development. This review discusses Cd effects on auxin biosynthesis and homeostasis, and the strategies for restoring plant growth based on exogenous auxin application. First, the two well-characterized auxin biosynthesis pathways in plants are described, as well as the effect of exogenous auxin application on plant growth. Then, review describes the impacts of Cd on the content, biosynthesis, conjugation, and oxidation of endogenous auxins, which are related to a decrease in root development, photosynthesis, and biomass production. Finally, compelling evidence of the beneficial effects of auxin-producing rhizobacteria in plants exposed to Cd is showed, focusing on photosynthesis, oxidative stress, and production of antioxidant compounds and osmolytes that counteract Cd toxicity, favoring plant growth and improve phytoremediation efficiency. Expanding our understanding of the positive effects of exogenous auxins application and the interactions between bacteria and plants growing in Cd-polluted environments will allow us to propose phytoremediation strategies for restoring environments contaminated with this metal.
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Affiliation(s)
- Gisela Adelina Rolón-Cárdenas
- Posgrado en Ciencias Químicas, Facultad de Ciencias Químicas, Universidad Autónoma de San Luis Potosí, Avenida Dr. Manuel Nava 6, Zona Universitaria, 78210, San Luis Potosí, San Luis Potosí, México
- Facultad de Estudios Profesionales Zona Huasteca, Universidad Autónoma de San Luis Potosí, Romualdo del Campo 501, Fraccionamiento Rafael Curiel, 79060, Ciudad Valles, San Luis Potosí, México
| | - Jackeline Lizzeta Arvizu-Gómez
- Secretaría de Investigación y Posgrado, Centro Nayarita de Innovación y Transferencia de Tecnología (CENITT), Universidad Autónoma de Nayarit, Tepic, Nayarit, México
| | - Ruth Elena Soria-Guerra
- Posgrado en Ciencias Químicas, Facultad de Ciencias Químicas, Universidad Autónoma de San Luis Potosí, Avenida Dr. Manuel Nava 6, Zona Universitaria, 78210, San Luis Potosí, San Luis Potosí, México
| | | | | | - Alejandro Hernández-Morales
- Posgrado en Ciencias Químicas, Facultad de Ciencias Químicas, Universidad Autónoma de San Luis Potosí, Avenida Dr. Manuel Nava 6, Zona Universitaria, 78210, San Luis Potosí, San Luis Potosí, México.
- Facultad de Estudios Profesionales Zona Huasteca, Universidad Autónoma de San Luis Potosí, Romualdo del Campo 501, Fraccionamiento Rafael Curiel, 79060, Ciudad Valles, San Luis Potosí, México.
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16
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Tanwir K, Shahid M, Abbas S, Ali Q, Akram MS, Chaudhary HJ, Javed MT. Deciphering distinct root exudation, ionomics, and physio-biochemical attributes of Serratia marcescens CP-13 inoculated differentially Cd tolerant Zea mays cultivars. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:71632-71649. [PMID: 35599287 DOI: 10.1007/s11356-022-20945-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2022] [Accepted: 05/15/2022] [Indexed: 06/15/2023]
Abstract
Cadmium (Cd) being a non-essential, mobile, and toxic heavy metal, negatively affects the plant growth and physiology. Current work investigated the impact of Serratia marcescens CP-13 inoculation on root organic acids and nutrient exudates of two maize cultivars varying in Cd tolerance under induced Cd toxicity. Seedlings of Cd-sensitive (Sahiwal-2002) and Cd-tolerant (MMRI-Yellow) cultivars were grown either inoculated or non-inoculated with CP-13 in Petri plates having various Cd stress levels (0, 6, 12, 18, 24, 30 μM). Seedlings were transferred to rhizoboxes for the collection of root exudates and analysis of physio-biochemical traits. Both maize cultivars exuded higher organic acids and nutrient exudates under non-inoculated conditions as compared to inoculated ones. Non-inoculated tolerant cultivar exhibited higher nutrient accumulation, biomass, antioxidants, total chlorophyll, Cd release meanwhile reduced Cd uptake, lipid peroxidation, exudation of organic acids, and nutrients than the sensitive one. However, under CP-13 inoculation, Cd sensitive cultivar exhibited less exudation of organic acids (citric acid, acetic acid, malic acid, glutamic acid, formic acid, succinic acid, and oxalic acid), nutrients mobilization (K, Na, Zn, Ca, and Mg), total chlorophyll, antioxidants (APX, SOD, POD), total soluble sugar, diminished MDA, and Cd uptake. The significant reduction in release of root exudates by both cultivars was likely due to the plant growth promoting traits of CP-13 which confer Cd tolerance. The maximum release of rhizospheric root exudates were documented at 30 μM applied Cd stress. Therefore, the Serratia sp. CP-13 was proposed as a potential inoculant for bioremediation of Cd together with maize cultivars.
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Affiliation(s)
- Kashif Tanwir
- Department of Botany, Faculty of Life Sciences, Government College University, Faisalabad, 38000, Pakistan
| | - Muhammad Shahid
- Department of Bioinformatics and Biotechnology, Government College University, Faisalabad, 38000, Pakistan
| | - Saghir Abbas
- Department of Botany, Faculty of Life Sciences, Government College University, Faisalabad, 38000, Pakistan
| | - Qasim Ali
- Department of Botany, Faculty of Life Sciences, Government College University, Faisalabad, 38000, Pakistan
| | - Muhammad Sohail Akram
- Department of Botany, Faculty of Life Sciences, Government College University, Faisalabad, 38000, Pakistan
| | - Hassan Javed Chaudhary
- Department of Plant Sciences, Faculty of Biological Sciences, Quaid-I-Azam University, Islamabad, 45320, Pakistan
| | - Muhammad Tariq Javed
- Department of Botany, Faculty of Life Sciences, Government College University, Faisalabad, 38000, Pakistan.
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Raza A, Salehi H, Rahman MA, Zahid Z, Madadkar Haghjou M, Najafi-Kakavand S, Charagh S, Osman HS, Albaqami M, Zhuang Y, Siddique KHM, Zhuang W. Plant hormones and neurotransmitter interactions mediate antioxidant defenses under induced oxidative stress in plants. FRONTIERS IN PLANT SCIENCE 2022; 13:961872. [PMID: 36176673 PMCID: PMC9514553 DOI: 10.3389/fpls.2022.961872] [Citation(s) in RCA: 68] [Impact Index Per Article: 34.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2022] [Accepted: 08/03/2022] [Indexed: 05/24/2023]
Abstract
Due to global climate change, abiotic stresses are affecting plant growth, productivity, and the quality of cultivated crops. Stressful conditions disrupt physiological activities and suppress defensive mechanisms, resulting in stress-sensitive plants. Consequently, plants implement various endogenous strategies, including plant hormone biosynthesis (e.g., abscisic acid, jasmonic acid, salicylic acid, brassinosteroids, indole-3-acetic acid, cytokinins, ethylene, gibberellic acid, and strigolactones) to withstand stress conditions. Combined or single abiotic stress disrupts the normal transportation of solutes, causes electron leakage, and triggers reactive oxygen species (ROS) production, creating oxidative stress in plants. Several enzymatic and non-enzymatic defense systems marshal a plant's antioxidant defenses. While stress responses and the protective role of the antioxidant defense system have been well-documented in recent investigations, the interrelationships among plant hormones, plant neurotransmitters (NTs, such as serotonin, melatonin, dopamine, acetylcholine, and γ-aminobutyric acid), and antioxidant defenses are not well explained. Thus, this review discusses recent advances in plant hormones, transgenic and metabolic developments, and the potential interaction of plant hormones with NTs in plant stress response and tolerance mechanisms. Furthermore, we discuss current challenges and future directions (transgenic breeding and genome editing) for metabolic improvement in plants using modern molecular tools. The interaction of plant hormones and NTs involved in regulating antioxidant defense systems, molecular hormone networks, and abiotic-induced oxidative stress tolerance in plants are also discussed.
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Affiliation(s)
- Ali Raza
- Key Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of Crops, Oil Crops Research Institute, Center of Legume Crop Genetics and Systems Biology/College of Agriculture, Fujian Agriculture and Forestry University, Fuzhou, China
| | - Hajar Salehi
- Laboratory of Plant Cell Biology, Department of Biology, Bu-Ali Sina University, Hamedan, Iran
| | - Md Atikur Rahman
- Grassland and Forage Division, National Institute of Animal Science, Rural Development Administration, Cheonan, South Korea
| | - Zainab Zahid
- Institute of Environmental Sciences and Engineering, School of Civil and Environmental Engineering, National University of Sciences and Technology, Islamabad, Pakistan
| | - Maryam Madadkar Haghjou
- Department of Biology, Plant Physiology, Faculty of Science, Lorestan University, Khorramabad, Iran
| | - Shiva Najafi-Kakavand
- Pharmaceutical Sciences Research Center, Health Institute, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Sidra Charagh
- State Key Laboratory of Rice Biology, China National Rice Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou, China
| | - Hany S. Osman
- Department of Agricultural Botany, Faculty of Agriculture, Ain Shams University, Cairo, Egypt
| | - Mohammed Albaqami
- Department of Biology, Faculty of Applied Science, Umm Al-Qura University, Makkah, Saudi Arabia
| | - Yuhui Zhuang
- College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou, China
| | | | - Weijian Zhuang
- Key Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of Crops, Oil Crops Research Institute, Center of Legume Crop Genetics and Systems Biology/College of Agriculture, Fujian Agriculture and Forestry University, Fuzhou, China
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18
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Mir AR, Alam P, Hayat S. Auxin regulates growth, photosynthetic efficiency and mitigates copper induced toxicity via modulation of nutrient status, sugar metabolism and antioxidant potential in Brassica juncea. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2022; 185:244-259. [PMID: 35717733 DOI: 10.1016/j.plaphy.2022.06.006] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Revised: 05/27/2022] [Accepted: 06/05/2022] [Indexed: 06/15/2023]
Abstract
The involvement of auxin (IAA) in growth and development of plants is well known, but its role in the mitigation of metal stress, especially copper (Cu), is not fully understood; therefore, it is time to explore its involvement in minimizing the stress. A pot experiment was conducted to assess the protective function of IAA, applied to the foliage, on photosynthetic machinery, carbohydrate metabolism, and growth of Brassica juncea, grown with Cu (30 or 60 mg kg-1 of soil). Among the different concentrations (10-10, 10-8, or 10-6 M), 10-8 M of IAA alone enhanced the photosynthetic characteristics, sugar accumulation and vegetative growth with minimal cellular oxidative stress level. Moreover, the same concentration of auxin was most effective in decreasing the stress levels generated by Cu and maintained it nearly to that of the control in terms of photosynthetic attributes, gas exchange parameters, PSII activity, electron transport rate, and growth attributes. Auxin also maintained the membrane stability and ultrastructure of chloroplast, stomatal morphology with a reduction in malondialdehyde (MDA), electrolyte leakage (EL) and cell death in test plants even under Cu stress. IAA also improved the translocation of Cu from root to the aerial parts, thus enhanced the Cu-reclamation in metal contaminated soils. Our findings suggest that the application of 10-8 M of IAA maintains the overall growth of plants and may be used as an effective agent to improve growth, photosynthesis and phyto-remediation potential of B. juncea in Cu contaminated soil.
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Affiliation(s)
- Anayat Rasool Mir
- Department of Botany, Plant Physiology Section, Faculty of Life Sciences, Aligarh Muslim University, Aligarh, 202002, India
| | - Pravej Alam
- Department of Biology, College of Science and Humanities in Al-Kharj, Prince Sattam Bin Abdulaziz University, 11942, Saudi Arabia
| | - Shamsul Hayat
- Department of Botany, Plant Physiology Section, Faculty of Life Sciences, Aligarh Muslim University, Aligarh, 202002, India.
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Mnafgui W, Hajlaoui H, Rizzo V, Muratore G, Elleuch A. Priming with EDTA, IAA and Fe Alleviates Pb Toxicity in Trigonella Foneum graecum L. growth: Phytochemicals and secondary metabolites. J Biotechnol 2022; 356:42-50. [PMID: 35914618 DOI: 10.1016/j.jbiotec.2022.07.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2022] [Revised: 07/16/2022] [Accepted: 07/28/2022] [Indexed: 11/29/2022]
Abstract
This study evaluated the effects of the exogenous application of ethylenediaminetetraacetic acid (EDTA), indole-3-acetic acid (IAA) and iron sulfate (FeSO4) upon the phytochemical mechanisms of fenugreek grown under Pb-excess (2000 mg L-1 PbCl2). The results showed that chemical additives of EDTA and IAA as well as FeSO4 improved fenugreek germination parameters. The radicle length and the amylase activity were significantly improved under IAA treatment compared to EDTA and FeSO4. Exogenous FeSO4 was more effective to improving growth parameters. Moreover, the decrease in hydrogen peroxide (H2O2) and malondialdehyde (MDA) levels was noted under all chemical additives especially under IAA application. In addition, it was more effective than EDTA and Fe in increasing catalase, glutathione (GSH), ascorbate peroxidase (APX), flavonoids and phenols while the increment superoxide dismutase (SOD) production was more pronounced under EDTA addition to Pb than other chelators. HPLC analysis revealed that the gallic was the major phenol produced under all chelators addition especially with IAA. In addition, the syringic acid was only produced with exogenous IAA while the quercetin was only detected under EDTA addition. Our results exhibited a higher IAA efficiency than EDTA and FeSO4 in mitigating Pb stress in fenugreek through up-regulated mechanisms of the antioxidant system for reducing reactive oxygen species (ROS) activities and enhancing special phenols.
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Affiliation(s)
- Wiem Mnafgui
- Laboratory of Plant Biotechnology, Faculty of Sciences, BP 1171, 3000 Sfax, University of Sfax, Tunisia; Regional Center for Agricultural Research in Sidi Bouzid. 9100, Tunisia. Laboratory of Non-Conventional Water Valuation (INRGREF), University of Carthage, Tunisia
| | - Hichem Hajlaoui
- Regional Center for Agricultural Research in Sidi Bouzid. 9100, Tunisia. Laboratory of Non-Conventional Water Valuation (INRGREF), University of Carthage, Tunisia
| | - Valeria Rizzo
- Di3A, Dipartimento di Agricoltura, Alimentazione e Ambiente, University of Catania, via S. Sofia 100, 95123 Catania, Italy
| | - Giuseppe Muratore
- Di3A, Dipartimento di Agricoltura, Alimentazione e Ambiente, University of Catania, via S. Sofia 100, 95123 Catania, Italy
| | - Amine Elleuch
- Laboratory of Plant Biotechnology, Faculty of Sciences, BP 1171, 3000 Sfax, University of Sfax, Tunisia.
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Zhao S, Cheng H, Xu P, Wang Y. Regulation of biosynthesis of the main flavor-contributing metabolites in tea plant ( Camellia sinensis): A review. Crit Rev Food Sci Nutr 2022; 63:10520-10535. [PMID: 35608014 DOI: 10.1080/10408398.2022.2078787] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
In the process of adapting to the environment, tea plants (Camellia sinensis) endow tea with unique flavor and health functions, which should be attributed to secondary metabolites, including catechins, L-theanine, caffeine and terpene volatiles. Since the content of these flavor-contributing metabolites are mainly determined by the growth of tea plant, it is very important to understand their alteration and regulation mechanisms. In the present work, we first summarize the distribution, change characteristics of the main flavor-contributing metabolites in different cultivars, organs and under environmental stresses of tea plant. Subsequently, we discuss the regulating mechanisms involved in the biosynthesis of these metabolites based on the existing evidence. Finally, we propose the remarks and perspectives on the future study relating flavor-contributing metabolites. This review would contribute to the acceleration of research on the characteristic secondary metabolites and the breeding programs in tea plants.
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Affiliation(s)
- Shiqi Zhao
- Tea Research Institute, Zhejiang University, Hangzhou, China
| | - Haiyan Cheng
- Tea Research Institute, Zhejiang University, Hangzhou, China
| | - Ping Xu
- Tea Research Institute, Zhejiang University, Hangzhou, China
| | - Yuefei Wang
- Tea Research Institute, Zhejiang University, Hangzhou, China
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21
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Li Y, Li Y, Cui Y, Xie Y, Shi Y, Shang Y, Ma F, Zhang J, Li C. GABA-mediated inhibition of cadmium uptake and accumulation in apples. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2022; 300:118867. [PMID: 35063536 DOI: 10.1016/j.envpol.2022.118867] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2021] [Revised: 12/30/2021] [Accepted: 01/15/2022] [Indexed: 06/14/2023]
Abstract
GABA, a four-carbon non-protein amino acid, plays an important role in animals and plants. We previously found GABA could alleviate alkali stress in apple seedlings. However, its physiological mechanism under heavy metal cadmium (Cd) stress need to be further studied. Thus, we explored its biological role in response to Cd stress. It was verified that 0.5 mM GABA could effectively alleviate Cd toxicity. Using NMT technique, we found that exogenous GABA could significantly reduce the net Cd2+ fluxes in apple roots, and Cd content was significantly lower than that in roots under Cd stress. Further analysis indicated exogenous GABA could significantly reduce the expression of genes related to the uptake and transport of Cd in apples under Cd stress. In addition, exogenous GABA could significantly increase the content of amino acids in apple roots under Cd stress. GAD is a key enzyme in GABA synthesis, we obtained transgenic apple roots of overexpression MdGAD1. Compared with the control, transgenic roots accumulated less Cd, maintained lower Cd uptake by roots, and lower expression of related transport genes. These results showed that GABA could effectively alleviate Cd toxicity in apple seedlings and provide a new perspective of GABA to alleviate Cd stress.
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Affiliation(s)
- Yuxing Li
- State Key Laboratory of Crop Stress Biology for Arid Areas, Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Yunhao Li
- State Key Laboratory of Crop Stress Biology for Arid Areas, Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Yinglian Cui
- State Key Laboratory of Crop Stress Biology for Arid Areas, Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Yuanmei Xie
- State Key Laboratory of Crop Stress Biology for Arid Areas, Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Yanjiao Shi
- State Key Laboratory of Crop Stress Biology for Arid Areas, Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Yueming Shang
- State Key Laboratory of Crop Stress Biology for Arid Areas, Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Fengwang Ma
- State Key Laboratory of Crop Stress Biology for Arid Areas, Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Jing Zhang
- State Key Laboratory of Crop Stress Biology for Arid Areas, Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Cuiying Li
- State Key Laboratory of Crop Stress Biology for Arid Areas, Shaanxi Key Laboratory of Apple, College of Horticulture, Northwest A&F University, Yangling, Shaanxi, 712100, China.
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22
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Mosa A, Selim EMM, El-Kadi SM, Khedr AA, Elnaggar AA, Hefny WA, Abdelhamid AS, El Kenawy AM, El-Naggar A, Wang H, Shaheen SM. Ecotoxicological assessment of toxic elements contamination in mangrove ecosystem along the Red Sea coast, Egypt. MARINE POLLUTION BULLETIN 2022; 176:113446. [PMID: 35245874 DOI: 10.1016/j.marpolbul.2022.113446] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2021] [Revised: 01/29/2022] [Accepted: 02/07/2022] [Indexed: 06/14/2023]
Abstract
Identifying biochemical aspects of the potentially toxic elements (PTEs) is of particular concern in mangrove ecosystems, Avicennia marina (Forssk.) Vierh., due to their importance as natural buffers in coastal areas. Nonetheless, the microbial community dynamics and potential scavenging responses of mangrove ecosystems to the phytotoxicity of PTEs remain questionable. This study assesses the ecological risk benchmarks of some PTEs, including aluminum (Al), boron (B), barium (Ba), cadmium (Cd), cobalt (Co), chromium (Cr), copper (Cu), iron (Fe), mercury (Hg), manganese (Mn), nickel (Ni), lead (Pb), and zinc (Zn), and their microbial responses in the bottom sediments of mangrove ecosystems along Egypt's Red Sea coast. In particular, we assessed the role of microbial metabolites in biochemical cycling of nutrients and scavenging against phytotoxicity hazards. We quantified a spectrum of ecological risk assessment indices, which suggested elevated levels of PTEs in sediment, particularly Cr, Hg, and Pb. Canonical correspondence analysis and generalized linear mixed effects models indicate that the spatial biodiversity of microbial taxa is impacted significantly by the physicochemical characteristics of sediments and concentrations of PTEs. Results demonstrate that the microbial communities and their metabolites exert a significant influence on organic matter (OM) decomposition and the biochemical cycling of phytoavailable nutrients including nitrogen (N), phosphorus (P), and potassium (K). Spatially, nitrogenase activities were higher (411.5 μmoL h-1 mL-1) in the southern sites of the Red Sea coast relative to the northern locations (93.8 μmoL h-1 mL-1). In contrast, higher concentrations of phytohormones, including indole-3-acetic acid (IAA) (61.5 mg mL-1) and gibberellins (534.2 mg mL-1), were more evident in northern sites. Siderophores correlated positively with Fe concentration in sediments and averaged 307.4 mg mL-1. Overall, these findings provide insights into the biochemical signals of PTEs contamination in hostile environments, contributing to a better understanding of the future prospects of PTEs bioremediation in contaminated coastal environments.
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Affiliation(s)
- Ahmed Mosa
- Soils Department, Faculty of Agriculture, Mansoura University, 35516 Mansoura, Egypt.
| | | | - Sherif M El-Kadi
- Agricultural Microbiology Department, Faculty of Agriculture, Damietta University, 34517, Egypt
| | - Abdelhamid A Khedr
- Botany and Microbiology Department, Faculty of Science, Damietta University, 34517, Egypt
| | - Abdelhamid A Elnaggar
- Soils Department, Faculty of Agriculture, Mansoura University, 35516 Mansoura, Egypt
| | - Wael A Hefny
- Nature Conservation Sector, Egyptian Environmental Affairs Agency (EEAA), Egypt
| | - Ahmad S Abdelhamid
- Soils Department, Faculty of Agriculture, Damietta University, 34517, Egypt
| | | | - Ali El-Naggar
- Department of Soil Sciences, Faculty of Agriculture, Ain Shams University, Cairo 11241, Egypt; State Key Laboratory of Subtropical Silviculture, Zhejiang A & F University, Hangzhou 311300, PR China; Department of Renewable Resources, University of Alberta, 442 Earth Sciences Building, Edmonton, Alberta T6G 2E3, Canada
| | - Hongyu Wang
- School of Civil Engineering, Wuhan University, Wuhan 430072, China
| | - Sabry M Shaheen
- University of Wuppertal, Laboratory of Soil- and Groundwater-Management, Pauluskirchstraße 7, 42285 Wuppertal, Germany.
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Alleviating Role of Gibberellic Acid in Enhancing Plant Growth and Stimulating Phenolic Compounds in Carrot (Daucus carota L.) under Lead Stress. SUSTAINABILITY 2021. [DOI: 10.3390/su132112329] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Toxicity of heavy-metals in soil is a major constraint for the production of carrots (Daucus carota L.). Different plant growth regulators are being used to overcome this problem. It has been found that plant growth regulators induce stress tolerance in plants. In this study, the role of exogenously applied plant growth regulator, gibberellic acid (GA3) was examined in soil grown two carrot cultivars under four different levels of lead (0, 50, 100, and 150 mg/kg) with one level of gibberellic acid (50 ppm). Results showed that Pb stress retarded the plant growth and reduced chlorophyll contents in the leaves of both carrot cultivars. A significant decrease was observed in photosynthetic attributes by Pb addition alone. However, exogenously applied GA3 ameliorated the plant growth and chlorophyll contents in the leaves of both carrot cultivars under Pb stressed conditions. Moreover, GA3 also decreased the uptake of Pb concentration in carrot leaves and roots. In addition, GA3 significantly regulated the phenolic compounds concentration in both carrot cultivars under Pb stress. In this study, cultivar T-29 was found to be more tolerant to Pb stress, however, cultivar Mevarick experienced higher damage regarding plant growth under Pb stress.
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Sharma A, Vishwakarma K, Singh NK, Prakash V, Ramawat N, Prasad R, Sahi S, Singh VP, Tripathi DK, Sharma S. Synergistic action of silicon nanoparticles and indole acetic acid in alleviation of chromium (Cr VI) toxicity in Oryza sativa seedlings. J Biotechnol 2021; 343:71-82. [PMID: 34534595 DOI: 10.1016/j.jbiotec.2021.09.005] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2020] [Revised: 08/22/2021] [Accepted: 09/06/2021] [Indexed: 12/22/2022]
Abstract
The present study investigates ameliorative effect of silicon nanoparticles (SiNPs) and indole acetic acid (IAA) alone and in combination against hexavalent chromium (CrVI) toxicity in rice seedlings. The results of the study revealed protective effects of SiNPs and IAA against CrVI toxicity. The 100μM of CrVI imposed toxic effects in rice seedlings at morphological, physiological and biochemical levels which coincided with increased level of intracellular CrVI and declined level of endogenous nitric oxide (NO). The CrVI enhanced levels of superoxide radicals (SOR) (59.51% and 50.1% in shoot and root, respectively) and H2O2 (19.5% and 23.69% in shoot and root, respectively). However, when SiNPs and IAA were applied to plants under CrVI stress, they enhanced tolerance and defence mechanisms as manifested in terms of increased biomass, endogenous NO, photosynthetic pigments, and antioxidants level (ascorbate-glutathione cycle). It was also noticed that CrVI arrested cell cycle at G2/M phase whereas growth was restored as compared to control when SiNPs and IAA were supplemented. Thus, the hypothesis that combined application of SiNPs and IAA will be effective in alleviating CrVI toxicity is validated from the results of this study. Moreover, in SiNPs and IAA-mediated mitigation of CrVI toxicity, endogenous NO has a positive role. The importance of the study will be that the combination of SiNPs and IAA can be utilized against heavy metal stress and even when supplied alone, they will enhance the crop productivity parameters with and without stress conditions.
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Affiliation(s)
- Aishwarya Sharma
- Department of Biotechnology, Motilal Nehru National Institute of Technology Allahabad, Prayagraj-211004 (UP) India
| | - Kanchan Vishwakarma
- Department of Biotechnology, Motilal Nehru National Institute of Technology Allahabad, Prayagraj-211004 (UP) India; Amity Institute of Microbial Technology, Amity University Uttar Pradesh, Sector 125, Noida-201313, India
| | - Nand Kumar Singh
- Department of Biotechnology, Motilal Nehru National Institute of Technology Allahabad, Prayagraj-211004 (UP) India
| | - Ved Prakash
- Department of Biotechnology, Motilal Nehru National Institute of Technology Allahabad, Prayagraj-211004 (UP) India
| | - Naleeni Ramawat
- Amity Institute of Organic Agriculture, Amity University Uttar Pradesh, I 2 Block, 5th Floor, AUUP Campus Sector-125, Noida-201313, India
| | - Rajendra Prasad
- Department of Horticulture, Kulbhasker Ashram PG Collage, Allahabad
| | - Shivendra Sahi
- University of the Sciences in Philadelphia (USP), Philadelphia, PA, United States
| | - Vijay Pratap Singh
- Plant Physiology Laboratory, Department of Botany, C.M.P. Degree College, A Constituent Post Graduate College of University of Allahabad, Prayagraj-211002, India.
| | - Durgesh Kumar Tripathi
- Amity Institute of Organic Agriculture, Amity University Uttar Pradesh, I 2 Block, 5th Floor, AUUP Campus Sector-125, Noida-201313, India.
| | - Shivesh Sharma
- Department of Biotechnology, Motilal Nehru National Institute of Technology Allahabad, Prayagraj-211004 (UP) India.
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Jan AU, Hadi F, Shah A, Ditta A, Nawaz MA, Tariq M. Plant growth regulators and EDTA improve phytoremediation potential and antioxidant response of Dysphania ambrosioides (L.) Mosyakin & Clemants in a Cd-spiked soil. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:43417-43430. [PMID: 33830421 DOI: 10.1007/s11356-021-13772-2] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2020] [Accepted: 03/29/2021] [Indexed: 05/22/2023]
Abstract
Soil pollution due to potentially toxic elements is a worldwide challenge for health and food security. Chelate-assisted phytoextraction along with the application of plant growth regulators (PGRs) could increase the phytoremediation efficiency of metal-contaminated soils. The present study was conducted to investigate the effect of different PGRs [Gibberellic acid (GA3) and indole acetic acid (IAA)] and synthetic chelator (EDTA) on growth parameters and Cd phytoextraction potential of Dysphania ambrosioides (L.) Mosyakin & Clemants grown under Cd-spiked soil. GA3 (10-7 M) and IAA (10-5 M) were applied four times with an interval of 10 days through a foliar spray, while EDTA (40 mg kg-1 soil) was once added to the soil. The results showed that Cd stress significantly decreased fresh biomass, dry biomass, total water contents, and photosynthetic pigments as compared to control. Application of PGRs significantly enhanced plant growth and Cd phytoextraction. The combined application of GA3 and IAA with EDTA significantly increased Cd accumulation (6.72 mg pot-1 dry biomass) and bioconcentration factor (15.21) as compared to C1 (Cd only). The same treatment significantly increased chlorophyll, proline, phenolic contents, and antioxidant activities (CAT, SOD, and POD) while MDA contents were reduced. In roots, Cd accumulation showed a statistically significant and positive correlation with proline, phenolics, fresh biomass, and dry biomass. Similarly, Cd accumulation showed a positive correlation with antioxidant enzyme activities in leaves. D. ambrosioides showed hyperaccumulation potential for Cd, based on bioconcentration factor (BCF) > 1. In conclusion, exogenous application of GA3 and IAA reduces Cd stress while EDTA application enhances Cd phytoextraction and ultimately the phytoremediation potential of D. ambrosioides.
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Affiliation(s)
- Amin Ullah Jan
- Department of Biotechnology, Faculty of Science, Shaheed Benazir Bhutto University Sheringal, Dir Upper, Khyber Pakhtunkhwa, 18000, Pakistan
| | - Fazal Hadi
- Department of Biotechnology, Faculty of Biological Science, University of Malakand, KPK, Dir Lower, Khyber Pakhtunkhwa, 18000, Pakistan
| | - Abdullah Shah
- Department of Biotechnology, Faculty of Science, Shaheed Benazir Bhutto University Sheringal, Dir Upper, Khyber Pakhtunkhwa, 18000, Pakistan
| | - Allah Ditta
- Department of Environmental Sciences, Shaheed Benazir Bhutto University Sheringal, Dir Upper, Khyber Pakhtunkhwa, 18000, Pakistan.
- School of Biological Sciences, The University of Western Australia, 35 Stirling Highway, Perth, WA, 6009, Australia.
| | - Muhammad Asif Nawaz
- Department of Biotechnology, Faculty of Science, Shaheed Benazir Bhutto University Sheringal, Dir Upper, Khyber Pakhtunkhwa, 18000, Pakistan
| | - Muhammad Tariq
- Beijing Normal University, No. 19, Xinjiekouwai Street, Haidian, Beijing, 100875, People's Republic of China
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Zhang R, Xu C, Bao Z, Xiao R, Chen X, Xiao W, Li D, Fu X, Yang C, Li L. Auxin alters sodium ion accumulation and nutrient accumulation by playing protective role in salinity challenged strawberry. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2021; 164:1-9. [PMID: 33932693 DOI: 10.1016/j.plaphy.2021.04.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2020] [Accepted: 04/06/2021] [Indexed: 05/20/2023]
Abstract
High salinity in soil affects the strawberry production and fruit quality. Auxin-primed plants have enhanced responses to soil salinization. In this study, we report that exogenous application of IAA can partially relieve stress responses of strawberry seedlings. Cytological analysis showed that the ultrastructure of root tip and leaf cells in strawberry seedlings were altered under high salinity condition, which was partially recovered after the application of IAA. The study showed that the ultrastructure of root tip and leaf cells in strawberry seedlings were altered under salt stress condition, which was partially recovered after the application of IAA. Exogenous IAA ameliorated deleterious effects on seedling growth under salinity were attributed to accelerated Na+ fluxes, decreased the contents of Na+ to maintain the ion homeostasis, protect root growth, and promote the absorption of nutrients for improved photosynthetic efficiency in strawberry.
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Affiliation(s)
- Rui Zhang
- College of Horticulture Science and Engineering, Shandong Agricultural University, Taian, Shandong, 271018, China; State Key Laboratory of Crop Biology, Taian, Shandong, 271018, China
| | - Chen Xu
- College of Horticulture Science and Engineering, Shandong Agricultural University, Taian, Shandong, 271018, China; State Key Laboratory of Crop Biology, Taian, Shandong, 271018, China
| | - Zhilong Bao
- College of Horticulture Science and Engineering, Shandong Agricultural University, Taian, Shandong, 271018, China; State Key Laboratory of Crop Biology, Taian, Shandong, 271018, China
| | - Rong Xiao
- College of Horticulture Science and Engineering, Shandong Agricultural University, Taian, Shandong, 271018, China; State Key Laboratory of Crop Biology, Taian, Shandong, 271018, China
| | - Xiude Chen
- College of Horticulture Science and Engineering, Shandong Agricultural University, Taian, Shandong, 271018, China; State Key Laboratory of Crop Biology, Taian, Shandong, 271018, China
| | - Wei Xiao
- College of Horticulture Science and Engineering, Shandong Agricultural University, Taian, Shandong, 271018, China; State Key Laboratory of Crop Biology, Taian, Shandong, 271018, China
| | - Dongmei Li
- College of Horticulture Science and Engineering, Shandong Agricultural University, Taian, Shandong, 271018, China; State Key Laboratory of Crop Biology, Taian, Shandong, 271018, China
| | - Xiling Fu
- College of Horticulture Science and Engineering, Shandong Agricultural University, Taian, Shandong, 271018, China; State Key Laboratory of Crop Biology, Taian, Shandong, 271018, China
| | - Chao Yang
- College of Horticulture Science and Engineering, Shandong Agricultural University, Taian, Shandong, 271018, China.
| | - Ling Li
- College of Horticulture Science and Engineering, Shandong Agricultural University, Taian, Shandong, 271018, China; State Key Laboratory of Crop Biology, Taian, Shandong, 271018, China.
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27
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Zhang C, Guo J, Zhang Z, Tian S, Liu Z, Shen C. Biochemical components and fungal community dynamics during the flowering process of Moringa-Fu brick tea, a novel microbially fermented blended tea. Lebensm Wiss Technol 2021. [DOI: 10.1016/j.lwt.2020.110822] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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28
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Priming Strategies for Benefiting Plant Performance under Toxic Trace Metal Exposure. PLANTS 2021; 10:plants10040623. [PMID: 33805922 PMCID: PMC8064369 DOI: 10.3390/plants10040623] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Revised: 03/19/2021] [Accepted: 03/22/2021] [Indexed: 11/25/2022]
Abstract
Combating environmental stress related to the presence of toxic elements is one of the most important challenges in plant production. The majority of plant species suffer from developmental abnormalities caused by an exposure to toxic concentrations of metals and metalloids, mainly Al, As, Cd, Cu, Hg, Ni, Pb, and Zn. However, defense mechanisms are activated with diverse intensity and efficiency. Enhancement of defense potential can be achieved though exogenously applied treatments, resulting in a higher capability of surviving and developing under stress and become, at least temporarily, tolerant to stress factors. In this review, I present several already recognized as well as novel methods of the priming process called priming, resulting in the so-called “primed state” of the plant organism. Primed plants have a higher capability of surviving and developing under stress, and become, at least temporarily, tolerant to stress factors. In this review, several already recognized as well as novel methods of priming plants towards tolerance to metallic stress are discussed, with attention paid to similarities in priming mechanisms activated by the most versatile priming agents. This knowledge could contribute to the development of priming mixtures to counteract negative effects of multi-metallic and multi-abiotic stresses. Presentation of mechanisms is complemented with information on the genes regulated by priming towards metallic stress tolerance. Novel compounds and techniques that can be exploited in priming experiments are also summarized.
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29
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Singh H, Bhat JA, Singh VP, Corpas FJ, Yadav SR. Auxin metabolic network regulates the plant response to metalloids stress. JOURNAL OF HAZARDOUS MATERIALS 2021; 405:124250. [PMID: 33109410 DOI: 10.1016/j.jhazmat.2020.124250] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2020] [Revised: 09/17/2020] [Accepted: 10/08/2020] [Indexed: 05/13/2023]
Abstract
Metalloids are among the major pollutants posing a risk to the environment and global food security. Plant roots uptake these toxic metalloids from the soil along with other essential minerals. Plants respond to metalloid stress by regulating the distribution and levels of various endogenous phytohormones. Recent research showed that auxin is instrumental in mediating resilience to metalloid-induced stress in plants. Exogenous supplementation of the auxin or plant growth-promoting micro-organisms (PGPMs) alleviates metalloid uptake, localization, and accumulation in the plant tissues, thereby improving plant growth under metalloid stress. Moreover, auxin triggers various biological responses such as the production of enzymatic and non-enzymatic antioxidants to combat nitro-oxidative stress induced by the metalloids. However, an in-depth understanding of the auxin stimulated molecular and physiological responses to the metalloid toxicity needs to be investigated in future studies. The current review attempts to provide an update on the recent advances and the current state-of-the-art associated with auxin and metalloid interaction, which could be used as a start point to develop biotechnological tools and create an eco-friendly environment.
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Affiliation(s)
- Harshita Singh
- Department of Biotechnology, Indian Institute of Technology, Roorkee 247667, Uttarakhand, India
| | - Javaid Akhter Bhat
- National Center for Soybean Improvement, Key L aboratory of Biology and Genetics and Breeding for Soybean, Ministry of Agriculture, State Key Laboratory of Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing 210095, China
| | - Vijay Pratap Singh
- Plant Physiology Laboratory, Department of Botany, C.M.P. Degree College, University of Allahabad, Prayagraj 211002, India
| | - Francisco J Corpas
- Department of Biochemistry, Cell and Molecular Biology, Estación Experimental del Zaidín, Consejo Superior de Investigaciones Científicas (CSIC), C/Profesor Albareda, 1, 18008 Granada, Spain
| | - Shri Ram Yadav
- Department of Biotechnology, Indian Institute of Technology, Roorkee 247667, Uttarakhand, India.
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30
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Abbas S, Javed MT, Ali Q, Akram MS, Tanwir K, Ali S, Chaudhary HJ, Iqbal N. Elucidating Cd-mediated distinct rhizospheric and in planta ionomic and physio-biochemical responses of two contrasting Zea mays L. cultivars. PHYSIOLOGY AND MOLECULAR BIOLOGY OF PLANTS : AN INTERNATIONAL JOURNAL OF FUNCTIONAL PLANT BIOLOGY 2021; 27:297-312. [PMID: 33707870 PMCID: PMC7907289 DOI: 10.1007/s12298-021-00936-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2020] [Revised: 01/09/2021] [Accepted: 01/19/2021] [Indexed: 06/12/2023]
Abstract
Cadmium (Cd) in soil-plant system can abridge plant growth by initiating alterations in root zones. Hydroponics and rhizoboxes are useful techniques to monitor plant responses against various natural and/or induced metal stresses. However, soil based studies are considered more appropriate in order to devise efficient food safety and remediation strategies. The present research evaluated the Cd-mediated variations in elemental dynamics of rhizospheric soil together with in planta ionomics and morpho-physio-biochemical traits of two differentially Cd responsive maize cultivars. Cd-sensitive (31P41) and Cd-tolerant (3062) cultivars were grown in pots filled with 0, 20, 40, 60 and 80 µg/kg CdCl2 supplemented soil. The results depicted that the maize cultivars significantly influenced the elemental dynamics of rhizosphere as well as in planta mineral accumulation under applied Cd stress. The uptake and translocation of N, P, K, Ca, Mg, Zn and Fe from rhizosphere and root cell sap was significantly higher in Cd stressed cv. 3062 as compared to cv. 31P41. In sensitive cultivar (31P41), Cd toxicity resulted in significantly prominent reduction of biomass, leaf area, chlorophyll, carotenoids, protein contents as well as catalase activity in comparison to tolerant one (3062). Analysis of tolerance indexes (TIs) validated that cv. 3062 exhibited advantageous growth and efficient Cd tolerance due to elevated proline, phenolics and activity of antioxidative machinery as compared to cv. 31P41. The cv. 3062 exhibited 54% and 37% less Cd bio-concentration (BCF) and translocation factors (TF), respectively in comparison to cv. 31P41 under highest Cd stress regime. Lower BCF and TF designated a higher Cd stabilization by tolerant cultivar (3062) in rhizospheric zone and its potential use in future remediation plans.
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Affiliation(s)
- Saghir Abbas
- Department of Botany, Faculty of Life Sciences, Government College University, Faisalabad, 38000 Pakistan
| | - Muhammad Tariq Javed
- Department of Botany, Faculty of Life Sciences, Government College University, Faisalabad, 38000 Pakistan
| | - Qasim Ali
- Department of Botany, Faculty of Life Sciences, Government College University, Faisalabad, 38000 Pakistan
| | - Muhammad Sohail Akram
- Department of Botany, Faculty of Life Sciences, Government College University, Faisalabad, 38000 Pakistan
| | - Kashif Tanwir
- Department of Botany, Faculty of Life Sciences, Government College University, Faisalabad, 38000 Pakistan
| | - Shafaqat Ali
- Department of Environmental Sciences and Engineering, Government College University, Faisalabad, 38000 Pakistan
- Department of Biological Sciences and Technology, China Medical University, Taichung, 40402 Taiwan
| | - Hassan Javed Chaudhary
- Department of Plant Sciences, Faculty of Biological Sciences, Quaid-I-Azam University, Islamabad, 45320 Pakistan
| | - Naeem Iqbal
- Department of Botany, Faculty of Life Sciences, Government College University, Faisalabad, 38000 Pakistan
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Tanwir K, Javed MT, Abbas S, Shahid M, Akram MS, Chaudhary HJ, Iqbal M. Serratia sp. CP-13 alleviates Cd toxicity by morpho-physio-biochemical improvements, antioxidative potential and diminished Cd uptake in Zea mays L. cultivars differing in Cd tolerance. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2021; 208:111584. [PMID: 33396107 DOI: 10.1016/j.ecoenv.2020.111584] [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: 06/29/2020] [Revised: 10/11/2020] [Accepted: 10/27/2020] [Indexed: 05/13/2023]
Abstract
Cadmium (Cd) is highly toxic for plant metabolic processes even in low concentration due to higher retention rates, longer half-life and non-biodegradable nature. The current study was designed to assess the bioremediation potential of Cd tolerant PGPR, Serratia sp. CP-13 together with two differentially Cd tolerant maize cultivars (MMRI-Yellow, Sahiwal-2002) selected amongst ten cultivars after screening. The maize cultivars were grown under different Cd treatments (0, 6, 12, 18, 24, 30 µM) in Petri plates both with and without Serratia sp. CP-13 inoculation. Treated plants were analyzed for their biomass accumulation, chlorophylls, carotenoids, proline, anthocyanin, protein, malondialdehyde (MDA), H2O2 as well as for antioxidants (POD, SOD, CAT) and mineral elements (Ca, Mg, Zn, K, Fe, Na, Cd). The maize cultivar MMRI-Yellow (tolerant) and Sahiwal-2002 (sensitive) exhibited significant reduction in leaf area, nutrient contents, plant biomass, activity of antioxidants, total proteins, photosynthetic pigments as well as flavonoids with increased production of H2O2, proline, MDA and relative membrane permeability (RMP) under Cd stress. However, this reduction was cultivar specific and recorded higher in cv. Sahiwal-2002 as compared to MMRI-Yellow. Application of Serratia sp. CP-13 significantly augmented plant biomass, photosynthetic pigments, antioxidative machinery, as well as flavonoids and proline while diminishing H2O2, RMP MDA production even under Cd stress in studied cultivars. Furthermore, CP-13 inoculation assisted the Cd stressed plants to sustain an optimal level of essential nutrients (Ca, Mg, Zn, K, Fe) except for Na and Cd which responded antagonistically. It was inferred that both inoculated maize cultivars exhibited better health and metabolism but substantial Cd tolerance was acquired by the sensitive cv. Sahiwal-2002 than the tolerant cv. MMRI-Yellow under applied Cd regimes. Furthermore, studied maize cultivars depicted maximum Cd tolerance in order of 30 < 24 < 18 < 12 < 6 < 0 µM Cd treatments under Serratia sp. CP-13 inoculation. Findings of current work highlighted the importance of Serratia sp. CP-13 and its inoculation impact on morpho-physio-biochemical attributes of maize growth under Cd dominant environment, which is likely an addition towards efficient approaches for bacterially-assisted Cd bioremediation and minimal Cd retention in edible plant parts.
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Affiliation(s)
- Kashif Tanwir
- Department of Botany, Faculty of Life Sciences, Government College University, Faisalabad 38000, Pakistan
| | - Muhammad Tariq Javed
- Department of Botany, Faculty of Life Sciences, Government College University, Faisalabad 38000, Pakistan.
| | - Saghir Abbas
- Department of Botany, Faculty of Life Sciences, Government College University, Faisalabad 38000, Pakistan
| | - Muhammad Shahid
- Department of Bioinformatics and Biotechnology, Government College University, Faisalabad 38000, Pakistan
| | - Muhammad Sohail Akram
- Department of Botany, Faculty of Life Sciences, Government College University, Faisalabad 38000, Pakistan
| | - Hassan Javed Chaudhary
- Department of Plant Sciences, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad 45320, Pakistan
| | - Muhammad Iqbal
- Department of Botany, Faculty of Life Sciences, Government College University, Faisalabad 38000, Pakistan
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Chen L, Hu WF, Long C, Wang D. Exogenous plant growth regulator alleviate the adverse effects of U and Cd stress in sunflower (Helianthus annuus L.) and improve the efficacy of U and Cd remediation. CHEMOSPHERE 2021; 262:127809. [PMID: 32781331 DOI: 10.1016/j.chemosphere.2020.127809] [Citation(s) in RCA: 47] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2020] [Revised: 07/17/2020] [Accepted: 07/22/2020] [Indexed: 05/22/2023]
Abstract
Plant growth regulators (PGRs) are widely used in agricultural activities and have the potential to improve plant growth and plant tolerance against metal stress. PGR-assisted phytoextraction is now an effective and inexpensive method for enhancing the plant removal of toxic metals from soil. In this study, we conducted experiments to determine the effects of PGR treatments on soil uranium (U) and cadmium (Cd) removal by sunflowers as well as their stress response to U and Cd contamination. We found that the plant growth was inhibited by combined U and Cd stress in sunflowers compared with that of the control; however, the application of exogenous PGR had reduced the combined U and Cd stress by stimulating photosynthesis, decreasing the levels of active oxygen and lipid peroxidation, and enhancing the activity of the antioxidant defence systems. Exogenous PGR also increased the uptake of U and Cd by sunflowers and therefore, improved their U and Cd remediation efficiency. Moreover, indoleacetic acid (IAA) was the most effective PGR at removing U and Cd in the soil; the U and Cd removal efficiency was 484.21% and 238.85% higher in the 500 mg L-1 IAA application compared with that of the control without PGR application, respectively. Furthermore, none of the PGR treatments significantly influenced the available U and Cd contents in soil. Our results, therefore, may provide some detailed understanding on the technologies for the sustainable remediation of U and Cd contaminated soil by the combination of PGR treatments and phytoextraction.
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Affiliation(s)
- Li Chen
- College of Life Science and Engineering, Southwest University of Science and Technology, Mianyang, 621010, Sichuan, People's Republic of China; College of Architecture and Environment, Sichuan University, Chengdu, 610065, Sichuan, People's Republic of China.
| | - Wei-Fang Hu
- Institute of Agricultural Resources and Environment, Guangdong Academy of Agricultural Sciences, Guangzhou, 510000, Guangdong, People's Republic of China.
| | - Chan Long
- College of Life Science and Engineering, Southwest University of Science and Technology, Mianyang, 621010, Sichuan, People's Republic of China.
| | - Dan Wang
- College of Life Science and Engineering, Southwest University of Science and Technology, Mianyang, 621010, Sichuan, People's Republic of China.
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Zhang M, Jin Z, Zhang X, Wang G, Li R, Qu J, Jin Y. Alleviation of Cd phytotoxicity and enhancement of rape seedling growth by plant growth-promoting bacterium Enterobacter sp. Zm-123. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:33192-33203. [PMID: 32524410 DOI: 10.1007/s11356-020-09558-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2020] [Accepted: 06/01/2020] [Indexed: 06/11/2023]
Abstract
The present study aims to investigate the impact of a metal-tolerant bacterium on metal detoxification and rape seedling growth promotion under Cd stress. The results showed that the isolated bacterium Enterobacter sp. Zm-123 has capability to resist Cd (200 mg/L), produce IAA (26.67 mg/L) and siderophores (82.34%), and solubilize phosphate (137.5 mg/L), etc. Zm-123 inoculation significantly enhanced the fresh weight of rape seedlings from 9.47 to 19.98% and the root length from 10.42 to 57.05% compared with non-inoculation group under different concentrations of Cd (0, 0.5, 1, 3, 5 mg/L) (p < 0.05). It also significantly increased the content of chlorophyll, soluble sugar, soluble protein, and proline (p < 0.05) in rape seedlings. Moreover, a significant elevation in catalase (CAT) and peroxidase (POD) activities and a significant reduction in malondialdehyde (MDA), electrolyte leakage (EL), and Cd content in rape seedlings were detected owing to Zm-123 inoculation (p < 0.05). The combined results imply that strain Zm-123 can alleviate the Cd phytotoxicity and promote the rape seedling growth by improving the physiological activity and antioxidant level, which can be potentially applied to protect plants from Cd toxicity.
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Affiliation(s)
- Meng Zhang
- College of Resources and Environmental Science, Northeast Agricultural University, Harbin, 150030, China
| | - Zonghui Jin
- College of Resources and Environmental Science, Northeast Agricultural University, Harbin, 150030, China
| | - Xu Zhang
- College of Resources and Environmental Science, Northeast Agricultural University, Harbin, 150030, China
| | - Guoliang Wang
- College of Resources and Environmental Science, Northeast Agricultural University, Harbin, 150030, China
| | - Rui Li
- College of Resources and Environmental Science, Northeast Agricultural University, Harbin, 150030, China
| | - Juanjuan Qu
- College of Resources and Environmental Science, Northeast Agricultural University, Harbin, 150030, China.
| | - Yu Jin
- College of Resources and Environmental Science, Northeast Agricultural University, Harbin, 150030, China.
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