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Bao X, Chong P, He C, Wang X, Zhang F. Mechanism on the promotion of host growth and enhancement of salt tolerance by Bacillaceae isolated from the rhizosphere of Reaumuria soongorica. Front Microbiol 2024; 15:1408622. [PMID: 38881656 PMCID: PMC11176432 DOI: 10.3389/fmicb.2024.1408622] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2024] [Accepted: 05/21/2024] [Indexed: 06/18/2024] Open
Abstract
Salt stress is a major abiotic stress that affects the growth of Reaumuria soongorica and many psammophytes in the desert areas of Northwest China. However, various Plant Growth-Promoting Rhizobacteria (PGPR) have been known to play an important role in promoting plant growth and alleviating the damaging effects of salt stress. In this study, three PGPR strains belonging to Bacillaceae were isolated from the rhizosphere of Reaumuria soongorica by morphological and molecular identification. All isolated strains exhibited capabilities of producing IAA, solubilizing phosphate, and fixing nitrogen, and were able to tolerate high levels of NaCl stress, up to 8-12%. The results of the pot-based experiment showed that salt (400 mM NaCl) stress inhibited Reaumuria soongorica seedlings' growth performance as well as biomass production, but after inoculation with strains P2, S37, and S40, the plant's height significantly increased by 26.87, 17.59, and 13.36%, respectively (p < 0.05), and both aboveground and root fresh weight significantly increased by more than 2 times compared to NaCl treatment. Additionally, inoculation with P2, S37, and S40 strains increased the content of photosynthetic pigments, proline, and soluble protein in Reaumuria soongorica seedlings under NaCl stress, while reducing the content of malondialdehyde and soluble sugars. Metabolomic analysis showed that strain S40 induces Reaumuria soongorica seedling leaves metabolome reprogramming to regulate cell metabolism, including plant hormone signal transduction and phenylalanine, tyrosine, and tryptophan biosynthesis pathways. Under NaCl stress, inoculation with strain S40 upregulated differential metabolites in plant hormone signal transduction pathways including plant hormones such as auxins (IAA), cytokinins, and jasmonic acid. The results indicate that inoculation with Bacillaceae can promote the growth of Reaumuria soongorica seedlings under NaCl stress and enhance salt tolerance by increasing the content of photosynthetic pigments, accumulating osmoregulatory substances, regulating plant hormone levels This study contributes to the enrichment of PGPR strains capable of promoting the growth of desert plants and has significant implications for the psammophytes growth and development in desert regions, as well as the effective utilization and transformation of saline-alkali lands.
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Affiliation(s)
- Xinguang Bao
- College of Forest of Gansu Agriculture University, Lanzhou, China
| | - Peifang Chong
- College of Forest of Gansu Agriculture University, Lanzhou, China
| | - Cai He
- Wuwei Academy of Forestry, Wuwei, China
| | - Xueying Wang
- College of Forest of Gansu Agriculture University, Lanzhou, China
| | - Feng Zhang
- College of Forest of Gansu Agriculture University, Lanzhou, China
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Alsiary WA, Madany MMY, AbdElgawad H. The pleiotropic role of Salinicoccus bacteria in enhancing ROS homeostasis and detoxification metabolism in soybean and oat to cope with pollution of triclosan. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2024; 207:108327. [PMID: 38271860 DOI: 10.1016/j.plaphy.2023.108327] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2023] [Accepted: 12/28/2023] [Indexed: 01/27/2024]
Abstract
Triclosan has been extensively used as a preservative in cosmetics and personal care products. However, its accumulation represents a real environmental threat. Thus, its phytotoxic impact needs more consideration. Our study was conducted to highlight the phytotoxic effect of triclosan on the growth, ROS homeostasis, and detoxification metabolism of two different plant species i.e., legumes (Glycine max) and grass (Avena sativa). Moreover, we investigated the potentiality of plant growth-promoting bacteria (ST-PGPB) in mitigating the phytotoxic effect of triclosan. Triclosan induced biomass (fresh and dry weights) reduction in both plants, but to a higher extent in oats. This decline was associated with a noticeable increment in the oxidative damage (e.g., MDA and H2O2) and detoxification metabolites such as metallothionein (MTC), phytochelatins (PCs), and glutathione-S-transferase (GST). This elevation was associated with a remarkable reduction in both enzymatic and non-enzymatic antioxidants. On the other hand, the bioactive strain of ST-PGPB, Salinicoccus sp. JzA1 significantly alleviated the harmful effect of triclosan on both soybean and oat plants by enhancing their biomass, photosynthesis, as well as levels of minerals (K, Ca, P, Mn, and Zn). In parallel, a striking quenching in oxidative damage and an obvious improvement in non-enzymatic (polyphenols, tocopherols, flavonoids) and enzymatic antioxidants were observed. Furthermore, Salinicoccus sp. JzA1 augmented the detoxification metabolism by enhancing the levels of phytochelatins, metallothionein, and glutathione-S-transferase (GST) activity in a species-specific manner which is more apparent in soybean rather than in oat plants. To this end, stress mitigating impact of Salinicoccus sp. JzA1 provides a basis to improve the resilience of crop species under cosmetics and personal care products toxicity.
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Affiliation(s)
- Waleed A Alsiary
- Department of Environmental Sciences, Faculty of Meteorology, Environment and Arid Land Agriculture, King Abdulaziz University, Jeddah, 21441, Saudi Arabia
| | - Mahmoud M Y Madany
- Department of Botany and Microbiology, Faculty of Science, Cairo University, Giza, 12613, Egypt; Biology Department, College of Science, Taibah University, Al-Madinah Al-Munawwarah 41411, Saudi Arabia.
| | - Hamada AbdElgawad
- Department of Botany, Faculty of Science, Beni-Suef University, Beni-Suef, Egypt
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Shen S, Li Y, Chen M, Huang J, Liu F, Xie S, Kong L, Pan Y. Reduced cadmium toxicity in rapeseed via alteration of root properties and accelerated plant growth by a nitrogen-fixing bacterium. JOURNAL OF HAZARDOUS MATERIALS 2023; 449:131040. [PMID: 36821906 DOI: 10.1016/j.jhazmat.2023.131040] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2023] [Revised: 02/09/2023] [Accepted: 02/17/2023] [Indexed: 06/18/2023]
Abstract
Cd accumulation in crops has become a global environmental problem because it endangers human health. Screening for microorganisms that can reduce Cd accumulation in crops is a possible measure to address this issue. However, success has been limited, and most previous work did not involve bacteria. In the present study, a strain of N-fixing bacteria (Burkholderia spp.) that exhibits high levels of Cd tolerance was screened. The ability of this bacterium to reduce Cd in rapeseed was then assessed in sterile hydroponic and open soil culture systems. In the hydroponic system, the Burkholderia inoculum promoted Cd fixation in rapeseed roots and thus reduced Cd enrichment in aboveground edible tissues (leaves). The mechanisms were related to increased activity of pectin methylesterase in root cell walls, and the transformation of the chemical form of root Cd from "active" (NaCl-extracted) to "inert" (HCl-extracted and residual Cd) states. Additionally, Burkholderia accelerated plant growth, thus shortening the period in which the plant is available for Cd absorption. In the soil culture system, Burkholderia also reduced Cd enrichment in rapeseed leaves in the presence of other microorganisms. Thus, the bacterial strain shows potential for broad application for reducing the accumulation of Cd in crops.
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Affiliation(s)
- Shili Shen
- Institute for Ecological Research and Pollution Control of Plateau Lakes, School of Ecology and Environmental Science, Yunnan University, Kunming 650091, Yunnan, China; Yunnan Key Laboratory for Plateau Mountain Ecology and Restoration of Degraded Environments, School of Ecology and Environmental Sciences, Yunnan University, Kunming 650091, Yunnan, China; School of Ecology and Environmental Sciences, Yunnan University, Kunming 650091, Yunnan, China
| | - Yinghan Li
- School of Ecology and Environmental Sciences, Yunnan University, Kunming 650091, Yunnan, China
| | - Mingbiao Chen
- School of Ecology and Environmental Sciences, Yunnan University, Kunming 650091, Yunnan, China; Instititue of International Rivers and Eco-security, Yunnan Key Laboratory of International Rivers and Trans-Boundary Eco-security, Yunnan University, Kunming 650091, China
| | - Juan Huang
- Instititue of International Rivers and Eco-security, Yunnan Key Laboratory of International Rivers and Trans-Boundary Eco-security, Yunnan University, Kunming 650091, China
| | - Feng Liu
- Wuzhou Agricultural Products Quality and Safety Comprehensive Testing Center, Wuzhou 543000, Guangxi, China
| | - Shijie Xie
- Yunnan Key Laboratory for Plateau Mountain Ecology and Restoration of Degraded Environments, School of Ecology and Environmental Sciences, Yunnan University, Kunming 650091, Yunnan, China; School of Ecology and Environmental Sciences, Yunnan University, Kunming 650091, Yunnan, China; Instititue of International Rivers and Eco-security, Yunnan Key Laboratory of International Rivers and Trans-Boundary Eco-security, Yunnan University, Kunming 650091, China
| | - Liping Kong
- Instititue of International Rivers and Eco-security, Yunnan Key Laboratory of International Rivers and Trans-Boundary Eco-security, Yunnan University, Kunming 650091, China
| | - Ying Pan
- Yunnan Key Laboratory for Plateau Mountain Ecology and Restoration of Degraded Environments, School of Ecology and Environmental Sciences, Yunnan University, Kunming 650091, Yunnan, China; School of Ecology and Environmental Sciences, Yunnan University, Kunming 650091, Yunnan, China.
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Wu X, Fan Y, Wang R, Zhao Q, Ali Q, Wu H, Gu Q, Borriss R, Xie Y, Gao X. Bacillus halotolerans KKD1 induces physiological, metabolic and molecular reprogramming in wheat under saline condition. FRONTIERS IN PLANT SCIENCE 2022; 13:978066. [PMID: 36035675 PMCID: PMC9404337 DOI: 10.3389/fpls.2022.978066] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/25/2022] [Accepted: 07/26/2022] [Indexed: 06/15/2023]
Abstract
Salt stress decreases plant growth and is a major threat to crop yields worldwide. The present study aimed to alleviate salt stress in plants by inoculation with halophilic plant growth-promoting rhizobacteria (PGPR) isolated from an extreme environment in the Qinghai-Tibetan Plateau. Wheat plants inoculated with Bacillus halotolerans KKD1 showed increased seedling morphological parameters and physiological indexes. The expression of wheat genes directly involved in plant growth was upregulated in the presence of KKD1, as shown by real-time quantitative PCR (RT-qPCR) analysis. The metabolism of phytohormones, such as 6-benzylaminopurine and gibberellic acid were also enhanced. Mining of the KKD1 genome corroborated its potential plant growth promotion (PGP) and biocontrol properties. Moreover, KKD1 was able to support plant growth under salt stress by inducing a stress response in wheat by modulating phytohormone levels, regulating lipid peroxidation, accumulating betaine, and excluding Na+. In addition, KKD1 positively affected the soil nitrogen content, soil phosphorus content and soil pH. Our findings indicated that KKD1 is a promising candidate for encouraging wheat plant growth under saline conditions.
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Affiliation(s)
- Xiaohui Wu
- Key Laboratory of Integrated Management of Crop Diseases and Pests, Ministry of Education, Department of Plant Pathology, College of Plant Protection, Nanjing Agricultural University, Nanjing, China
- State Key Laboratory of Plateau Ecology and Agriculture, Department of Grassland Science, College of Agricultural and Husbandry, Qinghai University, Xining, China
| | - Yaning Fan
- Key Laboratory of Integrated Management of Crop Diseases and Pests, Ministry of Education, Department of Plant Pathology, College of Plant Protection, Nanjing Agricultural University, Nanjing, China
| | - Ruoyi Wang
- Key Laboratory of Integrated Management of Crop Diseases and Pests, Ministry of Education, Department of Plant Pathology, College of Plant Protection, Nanjing Agricultural University, Nanjing, China
| | - Qian Zhao
- Key Laboratory of Integrated Management of Crop Diseases and Pests, Ministry of Education, Department of Plant Pathology, College of Plant Protection, Nanjing Agricultural University, Nanjing, China
| | - Qurban Ali
- Key Laboratory of Integrated Management of Crop Diseases and Pests, Ministry of Education, Department of Plant Pathology, College of Plant Protection, Nanjing Agricultural University, Nanjing, China
| | - Huijun Wu
- Key Laboratory of Integrated Management of Crop Diseases and Pests, Ministry of Education, Department of Plant Pathology, College of Plant Protection, Nanjing Agricultural University, Nanjing, China
| | - Qin Gu
- Key Laboratory of Integrated Management of Crop Diseases and Pests, Ministry of Education, Department of Plant Pathology, College of Plant Protection, Nanjing Agricultural University, Nanjing, China
| | - Rainer Borriss
- Institut für Biologie, Humboldt Universität, Berlin, Germany
- Nord Reet UG, Greifswald, Germany
| | - Yongli Xie
- State Key Laboratory of Plateau Ecology and Agriculture, Department of Grassland Science, College of Agricultural and Husbandry, Qinghai University, Xining, China
| | - Xuewen Gao
- Key Laboratory of Integrated Management of Crop Diseases and Pests, Ministry of Education, Department of Plant Pathology, College of Plant Protection, Nanjing Agricultural University, Nanjing, China
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Adhikary A, Saini R, Kumar R, Singh I, Ramakrishna W, Kumar S. Pseudomonas citronellolis alleviates arsenic toxicity and maintains cellular homeostasis in chickpea (Cicer arietinum L.). PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2022; 184:26-39. [PMID: 35623111 DOI: 10.1016/j.plaphy.2022.05.014] [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] [Revised: 04/23/2022] [Accepted: 05/13/2022] [Indexed: 06/15/2023]
Abstract
Arsenic is a hazardous metalloid that causes detrimental effects on plant growth and metabolism. Plants accumulate arsenic in edible parts that consequently enter the food chain leading to many health problems. Metal tolerant plant growth-promoting bacteria (PGPB) ameliorate heavy metal toxicity. In this study, the effect of arsenic (As5+) and the role of PGPB Pseudomonas citronellolis (PC) in mitigating As5+ toxicity and associated metabolic alterations in chickpea were assessed. Five chickpea varieties (PBG1, GPF2, PDG3, PDG4 and PBG5) were evaluated for arsenic accumulation, translocation, and its interference with metabolic and defense processes. As5+ (40 mg kg-1) interfered with plant metabolism and enhanced the antioxidative and carbohydrate metabolizing enzyme's activity but PC treatment maintained the activity at par with control. PC also facilitated the accumulation of As5+ in the root system and restricted its translocation to the shoot. Further, to map the metabolic changes, Gas chromatography Mass Spectroscopy (GC-MS) based metabolite profiling and gene expression analysis (qRT-PCR) were performed in the best and worst-performing chickpea varieties (PBG1 and PBG5). 48 metabolites of various metabolic pathways (amino acid, carbohydrate, and fatty acid) were altered in As5+ and PC treatment. Gene expressions showed correlation with biochemical analysis of the antioxidative enzymes and carbohydrate metabolizing enzymes while PC treatment improved chlorophyll biosynthesis enzyme CaDALA expression in As5+ treated plants. Therefore, PC mitigates As5+ toxicity by restricting it in the roots thereby maintaining the cellular homeostasis under As5+ stress in chickpeas.
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Affiliation(s)
- Arindam Adhikary
- Centre for Biosciences, Central University of Punjab, School of Basic and Applied Sciences, Bathinda, Punjab, 151401, India
| | - Rashmi Saini
- Centre for Biosciences, Central University of Punjab, School of Basic and Applied Sciences, Bathinda, Punjab, 151401, India
| | - Rashpal Kumar
- Centre for Biosciences, Central University of Punjab, School of Basic and Applied Sciences, Bathinda, Punjab, 151401, India
| | - Inderjit Singh
- Department of Plant Breeding and Genetics, Punjab Agricultural University, Ludhiana, Punjab, 141027, India
| | - Wusirika Ramakrishna
- Department of Biochemistry, Central University of Punjab, School of Basic Sciences, Bathinda, Punjab, 151401, India
| | - Sanjeev Kumar
- Centre for Biosciences, Central University of Punjab, School of Basic and Applied Sciences, Bathinda, Punjab, 151401, India; Department of Botany, Central University of Punjab, School of Basic Sciences, Bathinda, Punjab, 151401, India.
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Kaya C, Sarıoglu A, Ashraf M, Alyemeni MN, Ahmad P. The combined supplementation of melatonin and salicylic acid effectively detoxifies arsenic toxicity by modulating phytochelatins and nitrogen metabolism in pepper plants. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2022; 297:118727. [PMID: 34973379 DOI: 10.1016/j.envpol.2021.118727] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Revised: 11/28/2021] [Accepted: 12/20/2021] [Indexed: 06/14/2023]
Abstract
The main objective of the study was to assess if joint application of melatonin (MT, 0.1 mM) and salicylic acid (SA 0.5 mM) could improve tolerance of pepper plants to arsenic (As) as sodium hydrogen arsenate heptahydrate (0.05 mM). The imposition of arsenic stress led to accumulation of As in roots and leaves, and increased contents of leaf proline, phytochelatins, malondialdehyde (MDA) and H2O2, but it reduced plant biomass, chlorophylls (Chl), PSII maximum efficiency (Fv/Fm) and leaf water potential. Melatonin and SA applied jointly or alone enhanced nitrogen metabolism by triggering the activities of glutamate synthase, glutamine synthetase, and nitrite reductases and nitrate. In comparison with a single treatment of MT or SA, the joint treatment of MT and SA had better impact on enhancing growth and key biological events and decreasing tissue As content. This clearly shows a cooperative function of both agents in enhancing tolerance to As-toxicity in pepper plants.
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Affiliation(s)
- Cengiz Kaya
- Soil Science and Plant Nutrition Department, Harran University, Sanliurfa, Turkey
| | - Ali Sarıoglu
- Soil Science and Plant Nutrition Department, Harran University, Sanliurfa, Turkey
| | - Muhammad Ashraf
- University of Lahore, Lahore, Pakistan; International Centre for Chemical and Biological Sciences, University of Karachi, Pakistan
| | - Mohammed Nasser Alyemeni
- Botany and Microbiology Department, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - Parvaiz Ahmad
- Botany and Microbiology Department, College of Science, King Saud University, Riyadh, Saudi Arabia.
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Selim S, AbdElgawad H, Reyad AM, Alowaiesh BF, Hagagy N, Al-Sanea MM, Alsharari SS, Madany MMY. Potential use of a novel actinobacterial species to ameliorate tungsten nanoparticles induced oxidative damage in cereal crops. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2022; 171:226-239. [PMID: 34973889 DOI: 10.1016/j.plaphy.2021.11.042] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/09/2021] [Revised: 11/25/2021] [Accepted: 11/28/2021] [Indexed: 06/14/2023]
Abstract
Tungsten nanoparticles (WNPs) could induce hazard impact on plant growth and development; however, no study investigated their phytotoxicity. On the other hand, plant growth-promoting bacteria (PGPB) can effectively reduce WNPs toxicity. To this end, Nocardiopsis sp. was isolated and employed to mitigate the phytotoxic effect of WNPs on three crops (wheat, barley, and oat). Soil contamination with WPNs induced the W accumulation in all tested crops, inhibited both growth and photosynthesis and induced oxidative damage. On the other hand, pre-inoculation with Nocardiopsis sp. significantly reduced W level in treated plants. Concomitantly, Nocardiopsis sp. strikingly mitigated the inhibitory effect of WNPs by augmenting both growth and reactive oxygen species (ROS) homeostasis. To cope with heavy metal stress, all the tested species orchestrated their antioxidant homeostasis through enhancing the production of antioxidant metabolites (e.g., phenolics, flavonoids and tocopherols) and elevated the activities of ROS-scavenging enzymes (e.g., APX, POX, CAT, as well as the enzymes involved in AsA/GSH cycle). Moreover, pre-inoculation with Nocardiopsis sp. improved the detoxification metabolism by enhancing the accumulation of phytochelatins (PCs), metallothionein (MTC) and glutathione-S-transferase (GST) in grasses grown in WNPs-contaminated soils. Overall, restrained ROS homeostasis and improved WNPs detoxification systems were the bases underlie the WNPs stress mitigating impact of Nocardiopsis sp treatment.
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Affiliation(s)
- Samy Selim
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, Jouf University, Sakaka, 72341, Saudi Arabia.
| | - Hamada AbdElgawad
- Botany and Microbiology Department, Faculty of Science, Beni-Suef University, Beni-Suef, 62511, Egypt
| | - Ahmed Mohamed Reyad
- Biology Department, Faculty of Science, Jazan University, Jazan, Saudi Arabia; Botany and Microbiology Department, Faculty of Science, Beni-Suef University, Beni-Suef, 62511, Egypt
| | - Bassam F Alowaiesh
- Biology Department, College of Science, Jouf University, Sakaka, P.O. Box 72341, Saudi Arabia
| | - Nashwa Hagagy
- Department of Biology, College of Science and Arts at Khulis, University of Jeddah, Jeddah, Saudi Arabia; Botany and Microbiology Department, Faculty of Science, Suez Canal University, Ismailia, 41522, Egypt
| | - Mohammad M Al-Sanea
- Pharmaceutical Chemistry Department, College of Pharmacy, Jouf University, Sakaka, 72341, Aljouf Province, Saudi Arabia
| | - Salam S Alsharari
- Biology Department, College of Science, Jouf University, Sakaka, P.O. Box 72341, Saudi Arabia
| | - Mahmoud M Y Madany
- Department of Botany and Microbiology, Faculty of Science, Cairo University, Giza, 12613, Egypt.
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