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Cardozo FA, Feitosa V, Mendonça CMN, da Silva FVS, Converti A, de Souza Oliveira RP, Pessoa A. Enhanced production of N-acetyl-glucosaminidase by marine Aeromonas caviae CHZ306 in bioreactor. Braz J Microbiol 2023; 54:1533-1545. [PMID: 37610567 PMCID: PMC10485184 DOI: 10.1007/s42770-023-01088-x] [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: 05/31/2022] [Accepted: 07/31/2023] [Indexed: 08/24/2023] Open
Abstract
N-Acetyl-glucosaminidases (GlcNAcases) are exoenzymes found in a wide range of living organisms, which have gained great attention in the treatment of disorders related to diabetes, Alzheimer's, Tay-Sachs', and Sandhoff's diseases; the control of phytopathogens; and the synthesis of bioactive GlcNAc-containing products. Aiming at future industrial applications, in this study, GlcNAcase production by marine Aeromonas caviae CHZ306 was enhanced first in shake flasks in terms of medium composition and then in bench-scale stirred-tank bioreactor in terms of physicochemical conditions. Stoichiometric balance between the bioavailability of carbon and nitrogen in the formulated culture medium, as well as the use of additional carbon and nitrogen sources, played a central role in improving the bioprocess, considerably increasing the enzyme productivity. The optimal cultivation medium was composed of colloidal α-chitin, corn steep liquor, peptone A, and mineral salts, in a 5.2 C:N ratio. Optimization of pH, temperature, colloidal α-chitin concentration, and kLa conditions further increased GlcNAcase productivity. Under optimized conditions in bioreactor (i.e., 34 °C, pH 8 and kLa 55.2 h-1), GlcNAcase activity achieved 173.4 U.L-1 after 12 h of cultivation, and productivity no less than 14.45 U.L-1.h-1 corresponding to a 370-fold enhancement compared to basal conditions.
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Affiliation(s)
- Flávio Augusto Cardozo
- Departamento de Microbiologia, Instituto de Ciências Biomédicas, Universidade de São Paulo, São Paulo, Brasil.
| | - Valker Feitosa
- Departamento de Tecnologia Bioquímico-Farmacêutica, Faculdade de Ciências Farmacêuticas, Universidade de São Paulo, São Paulo, Brasil
- Departamento de Medicina e Enfermagem, Centro de Ciências Biológicas e da Saúde, Universidade Federal de Viçosa, Viçosa, Brasil
| | - Carlos Miguel Nóbrega Mendonça
- Departamento de Tecnologia Bioquímico-Farmacêutica, Faculdade de Ciências Farmacêuticas, Universidade de São Paulo, São Paulo, Brasil
- CICECO - Instituto de Materiais de Aveiro, Departamento de Química, Universidade de Aveiro, Aveiro, Portugal
| | - Francisco Vitor Santos da Silva
- Departamento de Tecnologia Bioquímico-Farmacêutica, Faculdade de Ciências Farmacêuticas, Universidade de São Paulo, São Paulo, Brasil
| | - Attilio Converti
- Departamento de Tecnologia Bioquímico-Farmacêutica, Faculdade de Ciências Farmacêuticas, Universidade de São Paulo, São Paulo, Brasil
- Dipartimento di Ingegneria Civile, Chimica e Ambientale, Università di Genova, Genova, Italia
| | | | - Adalberto Pessoa
- Departamento de Tecnologia Bioquímico-Farmacêutica, Faculdade de Ciências Farmacêuticas, Universidade de São Paulo, São Paulo, Brasil
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Kotb E, Alabdalall AH, Alghamdi AI, Ababutain IM, Aldakeel SA, Al-Zuwaid SK, Algarudi BM, Algarudi SM, Ahmed AA, Albarrag AM. Screening for chitin degrading bacteria in the environment of Saudi Arabia and characterization of the most potent chitinase from Streptomyces variabilis Am1. Sci Rep 2023; 13:11723. [PMID: 37474592 PMCID: PMC10359409 DOI: 10.1038/s41598-023-38876-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2023] [Accepted: 07/16/2023] [Indexed: 07/22/2023] Open
Abstract
Forty-six promising chitinolytic isolates were recovered during a screening for chitinolytic bacteria in the environment of Saudi Arabia. The top three isolates belonged to the genus Streptomyces. Streptomyces variabilis Am1 was able to excrete the highest amount of chitinases, reaching the maximum at 84 h with 0.5% yeast extract and nitrogen source and 2% galactose as a carbon source. Purification of chitinase by DEAE-Cellulose and Sephadex G75 improved the specific activity to 18.6-fold and the recovery to 23.8% and showed a mass at 56 kDa. The optimal catalysis of the purified chitinase was at 40 °C and pH 8 with high thermostability and pH stability as reflected by a midpoint temperature value of 66.6 °C and stability at pH 4-9. The protein reagents SDS, EDTA, and EGTA significantly inhibited the enzyme and the EDTA-chelated chitinase restored its activity after the addition of Fe2+ ions suggesting a metallo-chitinase type with ferric ions as cofactors. Chitinase exerted high antifungal activity against some phytopathogenic fungi. Interestingly, the tested Streptomyces were able to produce chitosan nanocubes along with chitosan from chitin degradation which may be an additional power in their antifungal activity in nature. This work also reveals the importance of unexplored environments as a pool of promising microorganisms with biotechnological applications.
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Affiliation(s)
- Essam Kotb
- Basic and Applied Scientific Research Center (BASRC), Imam Abdulrahman Bin Faisal University (IAU), P.O. Box 1982, Dammam, 31441, Saudi Arabia.
- Department of Biology, College of Science, Imam Abdulrahman Bin Faisal University (IAU), P.O. Box 1982, Dammam, 31441, Saudi Arabia.
| | - Amira H Alabdalall
- Basic and Applied Scientific Research Center (BASRC), Imam Abdulrahman Bin Faisal University (IAU), P.O. Box 1982, Dammam, 31441, Saudi Arabia
- Department of Biology, College of Science, Imam Abdulrahman Bin Faisal University (IAU), P.O. Box 1982, Dammam, 31441, Saudi Arabia
| | - Azzah I Alghamdi
- Basic and Applied Scientific Research Center (BASRC), Imam Abdulrahman Bin Faisal University (IAU), P.O. Box 1982, Dammam, 31441, Saudi Arabia
- Department of Biology, College of Science, Imam Abdulrahman Bin Faisal University (IAU), P.O. Box 1982, Dammam, 31441, Saudi Arabia
| | - Ibtisam M Ababutain
- Basic and Applied Scientific Research Center (BASRC), Imam Abdulrahman Bin Faisal University (IAU), P.O. Box 1982, Dammam, 31441, Saudi Arabia
- Department of Biology, College of Science, Imam Abdulrahman Bin Faisal University (IAU), P.O. Box 1982, Dammam, 31441, Saudi Arabia
| | - Sumayh A Aldakeel
- The National Center for Genomic Technology (NCGT), Life Science and Environment Research Institute, King Abdulaziz City for Science and Technology (KACST), Riyadh, Saudi Arabia
- Genomic of Infectious Diseases Laboratory, Saudi Center for Disease Prevention and Control, Public Health Authority, Riyadh, Saudi Arabia
| | - Safa K Al-Zuwaid
- Basic and Applied Scientific Research Center (BASRC), Imam Abdulrahman Bin Faisal University (IAU), P.O. Box 1982, Dammam, 31441, Saudi Arabia
- Department of Biology, College of Science, Imam Abdulrahman Bin Faisal University (IAU), P.O. Box 1982, Dammam, 31441, Saudi Arabia
| | - Batool M Algarudi
- Basic and Applied Scientific Research Center (BASRC), Imam Abdulrahman Bin Faisal University (IAU), P.O. Box 1982, Dammam, 31441, Saudi Arabia
- Department of Biology, College of Science, Imam Abdulrahman Bin Faisal University (IAU), P.O. Box 1982, Dammam, 31441, Saudi Arabia
| | - Sakina M Algarudi
- Basic and Applied Scientific Research Center (BASRC), Imam Abdulrahman Bin Faisal University (IAU), P.O. Box 1982, Dammam, 31441, Saudi Arabia
- Department of Biology, College of Science, Imam Abdulrahman Bin Faisal University (IAU), P.O. Box 1982, Dammam, 31441, Saudi Arabia
| | - Asmaa A Ahmed
- Department of Statistics, Faculty of Commerce, Al-Azhar University (Girls' Branch), P.O. Box 11751, Cairo, Egypt
| | - Ahmed M Albarrag
- Department of Pathology, School of Medicine, King Saud University, Riyadh, Saudi Arabia
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Thakur D, Chauhan A, Jhilta P, Kaushal R, Dipta B. Microbial chitinases and their relevance in various industries. Folia Microbiol (Praha) 2023; 68:29-53. [PMID: 35972681 DOI: 10.1007/s12223-022-00999-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Accepted: 07/31/2022] [Indexed: 01/09/2023]
Abstract
Chitin, the second most abundant biopolymer on earth after cellulose, is composed of β-1,4-N-acetylglucosamine (GlcNAc) units. It is widely distributed in nature, especially as a structural polysaccharide in the cell walls of fungi, the exoskeletons of crustaceans, insects, and nematodes. However, the principal commercial source of chitin is the shells of marine or freshwater invertebrates. Microbial chitinases are largely responsible for chitin breakdown in nature, and they play an important role in the ecosystem's carbon and nitrogen balance. Several microbial chitinases have been characterized and are gaining prominence for their applications in various sectors. The current review focuses on chitinases of microbial origin, their diversity, and their characteristics. The applications of chitinases in several industries such as agriculture, food, the environment, and pharmaceutical sectors are also highlighted.
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Affiliation(s)
- Deepali Thakur
- Dr Yashwant Singh Parmar University of Horticulture and Forestry, Nauni, Solan, 173230, Himachal Pradesh, India
| | - Anjali Chauhan
- Dr Yashwant Singh Parmar University of Horticulture and Forestry, Nauni, Solan, 173230, Himachal Pradesh, India
| | - Prakriti Jhilta
- Dr Yashwant Singh Parmar University of Horticulture and Forestry, Nauni, Solan, 173230, Himachal Pradesh, India
| | - Rajesh Kaushal
- Dr Yashwant Singh Parmar University of Horticulture and Forestry, Nauni, Solan, 173230, Himachal Pradesh, India
| | - Bhawna Dipta
- ICAR-Central Potato Research Institute, Shimla, 171001, Himachal Pradesh, India.
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Yun T, Jing T, Zhou D, Zhang M, Zhao Y, Li K, Zang X, Zhang L, Xie J, Wang W. Potential Biological Control of Endophytic Streptomyces sp. 5-4 Against Fusarium Wilt of Banana Caused by Fusarium oxysporum f. sp. cubense Tropical Race 4. PHYTOPATHOLOGY 2022; 112:1877-1885. [PMID: 35471064 DOI: 10.1094/phyto-11-21-0464-r] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Fusarium wilt of banana caused by Fusarium oxysporum f. sp. cubense tropical race 4 (Foc TR4) is one of the most disastrous fungal diseases. Biological control is a promising strategy for controlling Fusarium wilt of banana. To explore endophytic actinomycetes as biocontrol resources against Foc TR4, antagonistic strains were isolated from different tissues of medicinal plants. Here, a total of 144 actinomycetes were isolated and belonged to Nonomuraea, Kitasatospora, and Streptomyces. Forty-three isolates exhibited antifungal activities against Foc TR4. The strain labeled with 5-4 isolated from roots of Piper austrosinense had a broad-spectrum antifungal activity by the production of chitinase and β-1,3-glucanase and was identified as Streptomyces hygroscopicus subsp. hygroscopicus 5-4. Furthermore, disease index of banana wilt was significantly reduced by application of strain 5-4 in comparison with application of Foc TR4 alone. Exogenous application of strain 5-4 increased the expression levels of defense genes such as (PAL), peroxidase (POD), pathogenesis-related protein 1 (PR-1), hydrolytic enzymes (β-1,3-glucanase), lysin motif receptor kinase 1 (LYK-1), and mitogen-activated protein kinase 1 (MPK-1). The antifungal mechanism assay demonstrated that extracts of strain 5-4 inhibited spore gemination and hyphal growth of Foc TR4, and caused abnormally swollen, deformity, and rupture of Foc TR4 hypha. Thus, S. hygroscopicus subsp. hygroscopicus 5-4 could be used as a potential biological agent for controlling Fusarium wilt of banana.
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Affiliation(s)
- Tianyan Yun
- Key Laboratory of Biology and Genetic Resources of Tropical Crops, Ministry of Agriculture, Hainan Institute for Tropical Agricultural Resources, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences (CATAS), Haikou, 571101, China
- Haikou Experimental Station, Chinese Academy of Tropical Agricultural Sciences, Haikou, 571101, China
| | - Tao Jing
- Haikou Experimental Station, Chinese Academy of Tropical Agricultural Sciences, Haikou, 571101, China
| | - Dengbo Zhou
- Key Laboratory of Biology and Genetic Resources of Tropical Crops, Ministry of Agriculture, Hainan Institute for Tropical Agricultural Resources, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences (CATAS), Haikou, 571101, China
| | - Miaoyi Zhang
- Key Laboratory of Biology and Genetic Resources of Tropical Crops, Ministry of Agriculture, Hainan Institute for Tropical Agricultural Resources, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences (CATAS), Haikou, 571101, China
| | - Yankun Zhao
- Key Laboratory of Biology and Genetic Resources of Tropical Crops, Ministry of Agriculture, Hainan Institute for Tropical Agricultural Resources, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences (CATAS), Haikou, 571101, China
| | - Kai Li
- Key Laboratory of Biology and Genetic Resources of Tropical Crops, Ministry of Agriculture, Hainan Institute for Tropical Agricultural Resources, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences (CATAS), Haikou, 571101, China
| | - Xiaoping Zang
- Haikou Experimental Station, Chinese Academy of Tropical Agricultural Sciences, Haikou, 571101, China
| | - Lu Zhang
- Ministry of Education Key Laboratory for Ecology of Tropical Islands, Key Laboratory of Tropical Animal and Plant Ecology of Hainan Province, College of Life Sciences, Hainan Normal University, Haikou 571158, China
| | - Jianghui Xie
- Key Laboratory of Biology and Genetic Resources of Tropical Crops, Ministry of Agriculture, Hainan Institute for Tropical Agricultural Resources, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences (CATAS), Haikou, 571101, China
| | - Wei Wang
- Key Laboratory of Biology and Genetic Resources of Tropical Crops, Ministry of Agriculture, Hainan Institute for Tropical Agricultural Resources, Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences (CATAS), Haikou, 571101, China
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Alwahshi KJ, Purayil GP, Saeed EE, Abufarajallah HA, Aldhaheri SJ, AbuQamar SF, El-Tarabily KA. The 1-aminocyclopropane-1-carboxylic acid deaminase-producing Streptomyces violaceoruber UAE1 can provide protection from sudden decline syndrome on date palm. FRONTIERS IN PLANT SCIENCE 2022; 13:904166. [PMID: 35968092 PMCID: PMC9373858 DOI: 10.3389/fpls.2022.904166] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2022] [Accepted: 06/27/2022] [Indexed: 05/27/2023]
Abstract
In the United Arab Emirates (UAE), sudden decline syndrome (SDS) is one of the major fungal diseases caused by Fusarium solani affecting date palm plantations. To minimize the impact of the causal agent of SDS on date palm, native actinobacterial strains isolated from rhizosphere soils of healthy date palm plants were characterized according to their antifungal activities against F. solani DSM 106836 (Fs). Based on their in vitro abilities, two promising biocontrol agents (BCAs), namely Streptomyces tendae UAE1 (St) andStreptomyces violaceoruber UAE1 (Sv), were selected for the production of antifungal compounds and cell wall degrading enzymes (CWDEs), albeit their variations in synthesizing 1-aminocyclopropane-1-carboxylic acid (ACC) deaminase (ACCD). Although both isolates showed antagonism when applied 7 days before the pathogen in the greenhouse experiments, the ACCD-producing Sv was relatively superior in its efficacy against SDS over the non-ACCD-producing St. This was evident from the symptoms of SDS in diseased date palm seedlings which were greatly reduced by Sv compared to St. On a scale of 5.0, the estimated disease severity indices in Fs-diseased seedlings were significantly (P < 0.05) reduced from 4.8 to 1.5 and 0.5 by St and Sv, respectively. Thus, the number of conidia of Fs recovered from plants pre-treated with both BCAs was comparable, but significantly (P < 0.05) reduced compared to plants without any BCA treatment. In addition, a significant (P < 0.05) decrease in ACC levels of both the root and shoot tissues was detected inSv + Fs seedlings to almost similar levels of healthy seedlings. However, in planta ACC levels highly increased in seedlings grown in soils infested with the pathogen alone or amended with St prior to F. solani infestation (St + Fs). This suggests a major role of ACCD production in relieving the stress of date palm seedlings infected with F. solani, thus supporting the integrated preventive disease management programs against this pathogen. This is the first report of effective rhizosphere actinobacterial BCAs to provide protection against SDS on date palm, and to help increase agricultural productivity in a more sustainable manner in the UAE and the other arid regions.
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Affiliation(s)
- Khawla J. Alwahshi
- Department of Biology, College of Science, United Arab Emirates University, Al-Ain, United Arab Emirates
- Research Station Section, Abu Dhabi Agriculture and Food Safety Authority, Abu Dhabi, United Arab Emirates
| | - Gouthaman P. Purayil
- Department of Biology, College of Science, United Arab Emirates University, Al-Ain, United Arab Emirates
| | - Esam Eldin Saeed
- Khalifa Center for Genetic Engineering and Biotechnology, United Arab Emirates University, Al-Ain, United Arab Emirates
| | - Haneen A. Abufarajallah
- Department of Biology, College of Science, United Arab Emirates University, Al-Ain, United Arab Emirates
| | - Shama J. Aldhaheri
- Department of Biology, College of Science, United Arab Emirates University, Al-Ain, United Arab Emirates
| | - Synan F. AbuQamar
- Department of Biology, College of Science, United Arab Emirates University, Al-Ain, United Arab Emirates
| | - Khaled A. El-Tarabily
- Department of Biology, College of Science, United Arab Emirates University, Al-Ain, United Arab Emirates
- Khalifa Center for Genetic Engineering and Biotechnology, United Arab Emirates University, Al-Ain, United Arab Emirates
- Harry Butler Institute, Murdoch University, Murdoch, WA, Australia
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Alblooshi AA, Purayil GP, Saeed EE, Ramadan GA, Tariq S, Altaee AS, El-Tarabily KA, AbuQamar SF. Biocontrol Potential of Endophytic Actinobacteria against Fusarium solani, the Causal Agent of Sudden Decline Syndrome on Date Palm in the UAE. J Fungi (Basel) 2021; 8:jof8010008. [PMID: 35049948 PMCID: PMC8779766 DOI: 10.3390/jof8010008] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2021] [Revised: 12/16/2021] [Accepted: 12/18/2021] [Indexed: 01/07/2023] Open
Abstract
Thirty-one endophytic streptomycete and non-streptomycete actinobacteria were isolated from healthy date palm root tissues. In vitro screening revealed that the antifungal action of isolate #16 was associated with the production of cell-wall degrading enzymes, whereas with diffusible antifungal metabolites in isolate #28, albeit their production of volatile antifungal compounds. According to the 16S rRNA gene sequencing, isolates #16 and #28 were identified as Streptomyces polychromogenes UAE2 (Sp; GenBank Accession #: OK560620) and Streptomyces coeruleoprunus UAE1 (Sc; OK560621), respectively. The two antagonists were recovered from root tissues until 12 weeks after inoculation, efficiently colonized root cortex and xylem vessels, indicating that the date palm roots are a suitable habitat for these endophytic isolates. At the end of the greenhouse experiments, the development of sudden decline syndrome (SDS) was markedly suppressed by 53% with the application of Sp and 86% with Sc, confirming their potential in disease management. Results showed that the estimated disease severity indices in diseased seedlings were significantly (p < 0.05) reduced from 4.75 (scale of 5) to 2.25 or 0.67 by either Sp or Sc, respectively. In addition, conidial numbers of the pathogen significantly (p < 0.05) dropped by 38% and 76% with Sp and Sc, respectively, compared to infected seedlings with F. solani (control). Thus, the suppression of disease symptoms was superior in seedlings pre-inoculated with S. coeruleoprunus, indicating that the diffusible antifungal metabolites were responsible for F. solani retardation in these plants. This is the first report of actinobacteria naturally existing in date palm tissues acting as microbial antagonists against SDS on date palm.
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Affiliation(s)
- Aisha A. Alblooshi
- Department of Biology, College of Science, United Arab Emirates University, Al Ain 15551, United Arab Emirates; (A.A.A.); (G.P.P.); (G.A.R.); (A.S.A.)
| | - Gouthaman P. Purayil
- Department of Biology, College of Science, United Arab Emirates University, Al Ain 15551, United Arab Emirates; (A.A.A.); (G.P.P.); (G.A.R.); (A.S.A.)
| | - Esam Eldin Saeed
- Khalifa Center for Genetic Engineering and Biotechnology, United Arab Emirates University, Al Ain 15551, United Arab Emirates; (E.E.S.)
| | - Gaber A. Ramadan
- Department of Biology, College of Science, United Arab Emirates University, Al Ain 15551, United Arab Emirates; (A.A.A.); (G.P.P.); (G.A.R.); (A.S.A.)
| | - Saeed Tariq
- Department of Anatomy, College of Medicine and Health Sciences, United Arab Emirates University, Al Ain 15551, United Arab Emirates; (S.T.)
| | - Amna S. Altaee
- Department of Biology, College of Science, United Arab Emirates University, Al Ain 15551, United Arab Emirates; (A.A.A.); (G.P.P.); (G.A.R.); (A.S.A.)
| | - Khaled A. El-Tarabily
- Department of Biology, College of Science, United Arab Emirates University, Al Ain 15551, United Arab Emirates; (A.A.A.); (G.P.P.); (G.A.R.); (A.S.A.)
- Harry Butler Institute, Murdoch University, Murdoch, WA 6150, Australia
- Correspondence: (K.A.E.-T.); (S.F.A.); Tel.: +971-3-713-6518 (K.A.E.-T.); +971-3-713-6733 (S.F.A.)
| | - Synan F. AbuQamar
- Department of Biology, College of Science, United Arab Emirates University, Al Ain 15551, United Arab Emirates; (A.A.A.); (G.P.P.); (G.A.R.); (A.S.A.)
- Correspondence: (K.A.E.-T.); (S.F.A.); Tel.: +971-3-713-6518 (K.A.E.-T.); +971-3-713-6733 (S.F.A.)
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Pervaiz M, Sadiq S, Sadiq A, Younas U, Ashraf A, Saeed Z, Zuber M, Adnan A. Azo-Schiff base derivatives of transition metal complexes as antimicrobial agents. Coord Chem Rev 2021. [DOI: 10.1016/j.ccr.2021.214128] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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Effectiveness of Augmentative Biological Control of Streptomyces griseorubens UAE2 Depends on 1-Aminocyclopropane-1-Carboxylic Acid Deaminase Activity against Neoscytalidium dimidiatum. J Fungi (Basel) 2021; 7:jof7110885. [PMID: 34829174 PMCID: PMC8618148 DOI: 10.3390/jof7110885] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2021] [Revised: 10/14/2021] [Accepted: 10/15/2021] [Indexed: 11/17/2022] Open
Abstract
To manage stem canker disease on royal poinciana, actinobacterial isolates were used as biological control agents (BCAs) based on their strong in vitro inhibitory effects against Neoscytalidiumdimidiatum. Streptomyces griseorubens UAE2 and Streptomyces wuyuanensis UAE1 had the ability to produce antifungal compounds and cell-wall-degrading enzymes (CWDEs). Only S. griseorubens, however, restored the activity of 1-aminocyclopropane-1-carboxylate (ACC) deaminase (ACCD). In vivo apple fruit bioassay showed that lesion development was successfully constrained by either isolates on fruits inoculated with N. dimidiatum. In our greenhouse and container nursery experiments, S. griseorubens showed almost complete suppression of disease symptoms. This was evident when the preventive treatment of S. griseorubens significantly (p < 0.05) reduced the numbers of conidia of N. dimidiatum and defoliated leaves of royal poinciana seedlings to lesser levels than when S. wuyuanensis was applied, but comparable to control treatments (no pathogen). The disease management of stem canker was also associated with significant (p < 0.05) decreases in ACC levels in royal poinciana stems when S. griseorubens was applied compared to the non-ACCD-producing S. wuyuanensis. This study is the first to report the superiority of antagonistic actinobacteria to enhance their effectiveness as BCAs not only for producing antifungal metabolites and CWDEs but also for secreting ACCD.
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New Mononuclear and Binuclear Cu(II), Co(II), Ni(II), and Zn(II) Thiosemicarbazone Complexes with Potential Biological Activity: Antimicrobial and Molecular Docking Study. Molecules 2021; 26:molecules26082288. [PMID: 33920893 PMCID: PMC8071257 DOI: 10.3390/molecules26082288] [Citation(s) in RCA: 31] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Revised: 04/07/2021] [Accepted: 04/08/2021] [Indexed: 12/14/2022] Open
Abstract
Herein, we report the synthesis of eight new mononuclear and binuclear Co2+, Ni2+, Cu2+, and Zn2+ methoxy thiosemicarbazone (MTSC) complexes aiming at obtaining thiosemicarbazone complex with potent biological activity. The structure of the MTSC ligand and its metal complexes was fully characterized by elemental analysis, spectroscopic techniques (NMR, FTIR, UV-Vis), molar conductivity, thermogravimetric analysis (TG), and thermal differential analysis (DrTGA). The spectral and analytical data revealed that the obtained thiosemicarbazone-metal complexes have octahedral geometry around the metal center, except for the Zn2+-thiosemicarbazone complexes, which showed a tetrahedral geometry. The antibacterial and antifungal activities of the MTSC ligand and its (Co2+, Ni2+, Cu2+, and Zn2+) metal complexes were also investigated. Interestingly, the antibacterial activity of MTSC- metal complexes against examined bacteria was higher than that of the MTSC alone, which indicates that metal complexation improved the antibacterial activity of the parent ligand. Among different metal complexes, the MTSC- mono- and binuclear Cu2+ complexes showed significant antibacterial activity against Bacillus subtilis and Proteus vulgaris, better than that of the standard gentamycin drug. The in silico molecular docking study has revealed that the MTSC ligand could be a potential inhibitor for the oxidoreductase protein.
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Application of Bio-Friendly Formulations of Chitinase-Producing Streptomyces cellulosae Actino 48 for Controlling Peanut Soil-Borne Diseases Caused by Sclerotium rolfsii. J Fungi (Basel) 2021; 7:jof7030167. [PMID: 33669115 PMCID: PMC7996487 DOI: 10.3390/jof7030167] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2021] [Revised: 02/22/2021] [Accepted: 02/23/2021] [Indexed: 02/07/2023] Open
Abstract
Of ten actinobacterial isolates, Streptomyces cellulosae Actino 48 exhibited the strongest suppression of Sclerotium rolfsii mycelium growth and the highest chitinase enzyme production (49.2 U L-1 min-1). The interaction between Actino 48 and S. rolfsii was studied by scanning electron microscope (SEM), which revealed many abnormalities, malformations, and injuries of the hypha, with large loss of S. rolfsii mycelia density and mass. Three talc-based formulations with culture broth, cell-free supernatant, and cell pellet suspension of chitinase-producing Actino 48 were characterized using SEM, Fourier transform infrared spectroscopy (FTIR), and a particle size analyzer. All formulations were evaluated as biocontrol agents for reducing damping-off, root rot, and pods rot diseases of peanut caused by S. rolfsii under greenhouse and open-field conditions. The talc-based culture broth formulation was the most effective soil treatment, which decreased the percentage of peanut diseases under greenhouse and open-field conditions during two successive seasons. The culture broth formulation showed the highest increase in the dry weight of peanut shoots, root systems, and yielded pods. The transcriptional levels of three defense-related genes (PR-1, PR-3, and POD) were elevated in the culture broth formulation treatment compared with other formulations. Subsequently, the bio-friendly talc-based culture broth formulation of chitinase-producing Actino 48 could potentially be used as a biocontrol agent for controlling peanut soil-borne diseases caused by S. rolfsii.
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Katiski da Costa Stuart A, Lee Furuie J, Aparecida Cassilha Zawadneak M, Chapaval Pimentel I. Increased mortality of the European pepper moth Duponchelia fovealis (Lepidoptera:Crambidae) using entomopathogenic fungal consortia. J Invertebr Pathol 2020; 177:107503. [PMID: 33207222 DOI: 10.1016/j.jip.2020.107503] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2019] [Revised: 11/04/2020] [Accepted: 11/09/2020] [Indexed: 12/18/2022]
Abstract
The European pepper moth (Duponchelia fovealis) is an invasive pest affecting crops in many countries. The use of chemicals to control D. fovealis is not only ineffective but is hazardous to the environment. The most effective way to reduce this invasive species is biological control using entomopathogenic fungi. Furthermore, the use of combining entomopathogenic fungi is a novel and underexplored approach in the field of biocontrol research. The compatibility of different strains of Beauveria bassiana, Purpureocillium lilacinum, and Isaria javanica was evaluated by forming two-fungi consortia. The pathogenicity of these consortia against D. fovealis, as well as the related enzymatic activities, were investigated. Seven consortia increased D. fovealis mortality, showing synergistic activity. One consortium formed by two strains of B. bassiana produced highest control. Moreover, these consortia also demonstrated increased chitinase and lipase activities. Higher mortality of D. fovealis by these consortia was mainly associated with enzyme production. One consortium, also formed by two strains of B. bassiana, was unique in producing lower D. fovealis mortality than the two strains alone. The potential use of entomopathogenic fungal consortia is a promising alternative approach for biological control. Most of the consortia used in this study improved control of D. fovealis, showed synergistic activity and could be a suitable strategy to control this pest.
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Affiliation(s)
- Andressa Katiski da Costa Stuart
- Department of Basic Pathology, Sector of Biological Sciences, Federal University of Paraná, PO Box 19031, CEP 81531-990, Curitiba, Paraná, Brazil.
| | - Jason Lee Furuie
- Department of Basic Pathology, Sector of Biological Sciences, Federal University of Paraná, PO Box 19031, CEP 81531-990, Curitiba, Paraná, Brazil
| | - Maria Aparecida Cassilha Zawadneak
- Department of Basic Pathology, Sector of Biological Sciences, Federal University of Paraná, PO Box 19031, CEP 81531-990, Curitiba, Paraná, Brazil
| | - Ida Chapaval Pimentel
- Department of Basic Pathology, Sector of Biological Sciences, Federal University of Paraná, PO Box 19031, CEP 81531-990, Curitiba, Paraná, Brazil
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12
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Lutz S, Thuerig B, Oberhaensli T, Mayerhofer J, Fuchs JG, Widmer F, Freimoser FM, Ahrens CH. Harnessing the Microbiomes of Suppressive Composts for Plant Protection: From Metagenomes to Beneficial Microorganisms and Reliable Diagnostics. Front Microbiol 2020; 11:1810. [PMID: 32849417 PMCID: PMC7406687 DOI: 10.3389/fmicb.2020.01810] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2020] [Accepted: 07/09/2020] [Indexed: 01/20/2023] Open
Abstract
Soil-borne diseases cause significant yield losses worldwide, are difficult to treat and often only limited options for disease management are available. It has long been known that compost amendments, which are routinely applied in organic and integrated farming as a part of good agricultural practice to close nutrient cycles, can convey a protective effect. Yet, the targeted use of composts against soil-borne diseases is hampered by the unpredictability of the efficacy. Several studies have identified and/or isolated beneficial microorganisms (i.e., bacteria, oomycetes, and fungi) from disease suppressive composts capable of suppressing pathogens (e.g., Pythium and Fusarium) in various crops (e.g., tomato, lettuce, and cucumber), and some of them have been developed into commercial products. Yet, there is growing evidence that synthetic or complex microbial consortia can be more effective in controlling diseases than single strains, but the underlying molecular mechanisms are poorly understood. Currently, a major bottleneck concerns the lack of functional assays to identify the most potent beneficial microorganisms and/or key microbial consortia from complex soil and compost microbiomes, which can harbor tens of thousands of species. This focused review describes microorganisms, which have been isolated from, amended to or found to be abundant in disease-suppressive composts and for which a beneficial effect has been documented. We point out opportunities to increasingly harness compost microbiomes for plant protection through an integrated systems approach that combines the power of functional assays to isolate biocontrol and plant growth promoting strains and further prioritize them, with functional genomics approaches that have been successfully applied in other fields of microbiome research. These include detailed metagenomics studies (i.e., amplicon and shotgun sequencing) to achieve a better understanding of the complex system compost and to identify members of taxa enriched in suppressive composts. Whole-genome sequencing and complete assembly of key isolates and their subsequent functional profiling can elucidate the mechanisms of action of biocontrol strains. Integrating the benefits of these approaches will bring the long-term goals of employing microorganisms for a sustainable control of plant pathogens and developing reliable diagnostic assays to assess the suppressiveness of composts within reach.
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Affiliation(s)
- Stefanie Lutz
- Agroscope, Research Group Molecular Diagnostics, Genomics and Bioinformatics, Wädenswil, Switzerland.,SIB Swiss Institute of Bioinformatics, Wädenswil, Switzerland
| | - Barbara Thuerig
- Research Institute of Organic Agriculture (FiBL), Department of Crop Sciences, Frick, Switzerland
| | - Thomas Oberhaensli
- Research Institute of Organic Agriculture (FiBL), Department of Crop Sciences, Frick, Switzerland
| | | | - Jacques G Fuchs
- Research Institute of Organic Agriculture (FiBL), Department of Crop Sciences, Frick, Switzerland
| | - Franco Widmer
- Agroscope, Research Group Molecular Ecology, Zurich, Switzerland
| | - Florian M Freimoser
- Agroscope, Research Group Phytopathology and Zoology in Fruit and Vegetable Production, Wädenswil, Switzerland
| | - Christian H Ahrens
- Agroscope, Research Group Molecular Diagnostics, Genomics and Bioinformatics, Wädenswil, Switzerland.,SIB Swiss Institute of Bioinformatics, Wädenswil, Switzerland
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Shivalee A, Lingappa K, Mahesh D. Influence of bioprocess variables on the production of extracellular chitinase under submerged fermentation by Streptomyces pratensis strain KLSL55. J Genet Eng Biotechnol 2018; 16:421-426. [PMID: 30733755 PMCID: PMC6353736 DOI: 10.1016/j.jgeb.2017.12.006] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2017] [Revised: 12/12/2017] [Accepted: 12/29/2017] [Indexed: 11/23/2022]
Abstract
Chitinases are the enzymes which are capable of hydrolyzing chitin to its monomer N-acetyl glucosamine (GlcNac). Present study emphasizes on the impact of critical process variables on the production of chitinase from Streptomyces pratensis strain KLSL55. Initially the isolate was noticed to produce 84.67 IU chitinase in basal production medium. At optimization of bioprocess variables, the physical parameters pH of 8.00, 40 °C of incubation temperature, agitation speed of 160 rpm and 1.25 mL of spore suspension were found optimum for improved production of chitinase. Further, formulated production medium with 1.5% colloidal chitin, 1.25% fructose greatly influenced the chitinase production. At all described optimum conditions with formulated production media, a total of 14.30-fold increment was achieved in the chitinase production with final activity of 1210.67 IU when compared to the initial fermentation conditions in basal production medium.
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Affiliation(s)
| | - K. Lingappa
- Department of Post Graduate Studies and Research in Microbiology, Gulbarga University, Kalaburagi 585106, Karnataka, India
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14
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Alibrahim KA, Al-Saif FA, Alghamdi MT, El-Shahawi MS, Moustafa YM, Refat MS. Synthesis, spectroscopic, thermal, antimicrobial and electrochemical characterization of some novel Ru(iii), Pt(iv) and Ir(iii) complexes of pipemidic acid. RSC Adv 2018; 8:22515-22529. [PMID: 35539728 PMCID: PMC9081379 DOI: 10.1039/c8ra03879a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2018] [Accepted: 06/09/2018] [Indexed: 11/21/2022] Open
Abstract
Three new solid complexes of pipemidic acid (Pip-H) with Ru3+, Pt4+ and Ir3+ were synthesized and characterized. Pipemidic acid acts as a uni-dentate chelator through the nitrogen atom of the -NH piperazyl ring. The spectroscopic data revealed that the general formulas of Pip-H complexes are [M(L) n (Cl) x ]·yH2O ((1) M = Ru3+, L: Pip-H, n = 3, x = 3, y = 6; (2) M = Pt4+, L: Pip-NH4, n = 2, x = 4, y = 0 and (3) M = Ir3+, L: Pip-H, n = 3, x = 3, y = 6). The number of water molecules with their locations inside or outside the coordination sphere were assigned via thermal analyses (TG, DTG). The DTG curves refer to 2-3 thermal decomposition steps where the first decomposition step at a lower temperature corresponds to the loss of uncoordinated water molecules followed by the decomposition of Pip-H molecules at higher temperatures. Thermodynamic parameters (E*, ΔS*, ΔH* and ΔG*) were calculated from the TG curves using Coats-Redfern and Horowitz-Metzeger non-isothermal models. X-ray powder diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM) techniques were carefully used to assign properly the particle sizes of the prepared Pip-H complexes. The biological enhancement of Pip-H complexes rather than free chelate were assessed in vitro against four kinds of bacteria G(+) (Staphylococcus epidermidis and Staphylococcus aureus) and G(-) (Klebsiella and Escherichia coli) as well as against the human breast cancer (MCF-7) tumor cell line.
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Affiliation(s)
- Khuloud A Alibrahim
- College of Science, Princess Nourah bint Abdulrahman University, Department of Chemistry Kingdom of Saudi Arabia
| | - Foziah A Al-Saif
- College of Science, Princess Nourah bint Abdulrahman University, Department of Chemistry Kingdom of Saudi Arabia
| | - M T Alghamdi
- Department of Chemistry, Faculty of Science, King Abdulaziz University Jeddah P. O. Box 80203 Saudi Arabia
| | - M S El-Shahawi
- Department of Chemistry, Faculty of Science, King Abdulaziz University Jeddah P. O. Box 80203 Saudi Arabia
- Department of Chemistry, Faculty of Science, Damiatta University Damiatta Egypt
| | - Y M Moustafa
- Faculty of Applied Science, Umm Al-Qura University P. O. Box 16722 Makkah 21955 Saudi Arabia
| | - Moamen S Refat
- Department of Chemistry, Faculty of Science, Taif University Al-Hawiah, P. O. Box 888 Zip Code 21974 Taif Saudi Arabia
- Department of Chemistry, Faculty of Science, Port Said University Port Said Egypt
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15
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Kamil FH, Saeed EE, El-Tarabily KA, AbuQamar SF. Biological Control of Mango Dieback Disease Caused by Lasiodiplodia theobromae Using Streptomycete and Non-streptomycete Actinobacteria in the United Arab Emirates. Front Microbiol 2018; 9:829. [PMID: 29780366 PMCID: PMC5945903 DOI: 10.3389/fmicb.2018.00829] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2018] [Accepted: 04/11/2018] [Indexed: 11/13/2022] Open
Abstract
Dieback caused by the fungus Lasiodiplodia theobromae is an important disease on mango plantations in the United Arab Emirates (UAE). In this study, 53 actinobacterial isolates were obtained from mango rhizosphere soil in the UAE, of which 35 (66%) were classified as streptomycetes (SA) and 18 (34%) as non-streptomycetes (NSA). Among these isolates, 19 (12 SA and 7 NSA) showed antagonistic activities against L. theobromae associated with either the production of diffusible antifungal metabolites, extracellular cell-wall-degrading enzymes (CWDEs), or both. Using a "novel" mango fruit bioassay, all isolates were screened in vivo for their abilities to reduce lesion severity on fruits inoculated with L. theobromae. Three isolates, two belonging to Streptomyces and one to Micromonospora spp., showed the strongest inhibitory effect against this pathogen in vitro and were therefore selected for tests on mango seedlings. Our results revealed that the antifungal action of S. samsunensis UAE1 was related to antibiosis, and the production of CWDEs (i.e., chitinase) and siderophores; whilst S. cavourensis UAE1 and M. tulbaghiae UAE1 were considered to be associated with antibiotic- and CWDE-production, respectively. Pre-inoculation in greenhouse experiments with the most promising actinobacterial isolates resulted in very high levels of disease protection in mango seedlings subsequently inoculated with the pathogen. This was evident by the dramatic reduction in the estimated disease severity indices of the mango dieback of individual biocontrol agent (BCA) applications compared with the pathogen alone, confirming their potential in the management of mango dieback disease. L. theobromae-infected mango seedlings treated with S. samsunensis showed significantly reduced number of defoliated leaves and conidia counts of L. theobromae by 2- and 4-fold, respectively, in comparison to the other two BCA applications. This indicates that the synergistic antifungal effects of S. samsunensis using multiple modes of action retarded the in planta invasion of L. theobromae. This is the first report of BCA effects against L. theobromae on mango seedlings by microbial antagonists. It is also the first report of actinobacteria naturally existing in the soils of the UAE or elsewhere that show the ability to suppress the mango dieback disease.
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Affiliation(s)
- Fatima H Kamil
- Department of Biology, United Arab Emirates University, Al-Ain, United Arab Emirates
| | - Esam E Saeed
- Department of Biology, United Arab Emirates University, Al-Ain, United Arab Emirates
| | - Khaled A El-Tarabily
- Department of Biology, United Arab Emirates University, Al-Ain, United Arab Emirates.,School of Veterinary and Life Sciences, Murdoch University, Murdoch, WA, Australia
| | - Synan F AbuQamar
- Department of Biology, United Arab Emirates University, Al-Ain, United Arab Emirates
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Edelvio DBG, Leo RLD, Rita DCMDM. Actinomycetes bioactive compounds: Biological control of fungi and phytopathogenic insect. ACTA ACUST UNITED AC 2018. [DOI: 10.5897/ajb2017.16323] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
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17
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Mishra A, Singh SP, Mahfooz S, Bhattacharya A, Mishra N, Shirke PA, Nautiyal CS. Bacterial endophytes modulates the withanolide biosynthetic pathway and physiological performance in Withania somnifera under biotic stress. Microbiol Res 2018; 212-213:17-28. [PMID: 29853165 DOI: 10.1016/j.micres.2018.04.006] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2017] [Revised: 03/22/2018] [Accepted: 04/21/2018] [Indexed: 12/14/2022]
Abstract
Despite the vast exploration of endophytic microbes for growth enhancement in various crops, knowledge about their impact on the production of therapeutically important secondary metabolites is scarce. In the current investigation, chitinolytic bacterial endophytes were isolated from selected medicinal plants and assessed for their mycolytic as well as plant growth promoting potentials. Among them the two most efficient bacterial endophytes namely Bacillus amyloliquefaciens (MPE20) and Pseudomonas fluorescens (MPE115) individually as well as in combination were able to modulate withanolide biosynthetic pathway and tolerance against Alternaria alternata in Withania somnifera. Interestingly, the expression level of withanolide biosynthetic pathway genes (3-hydroxy-3-methylglutaryl co-enzyme A reductase, 1-deoxy-D-xylulose-5-phosphate reductase, farnesyl di-phosphate synthase, squalene synthase, cytochrome p450, sterol desaturase, sterol Δ-7 reductase and sterol glycosyl transferases) were upregulated in plants treated with the microbial consortium under A. alternata stress. In addition, application of microbes not only augmented withaferin A, withanolide A and withanolide B content (1.52-1.96, 3.32-5.96 and 12.49-21.47 fold, respectively) during A. alternata pathogenicity but also strengthened host resistance via improvement in the photochemical efficiency, normalizing the oxidized and non-oxidized fraction, accelerating photochemical and non-photochemical quantum yield, and electron transport rate. Moreover, reduction in the passively dissipated energy of PSI and PSII in microbial combination treated plants corroborate well with the above findings. Altogether, the above finding highlights novel insights into the underlying mechanisms in application of endophytes and emphasizes their capability to accelerate biosynthesis of withanolides in W. somnifera under biotic stress caused by A. alternata.
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Affiliation(s)
- Aradhana Mishra
- Division of Plant Microbe Interaction, Council of Scientific and Industrial Research-National Botanical Research Institute, Lucknow, 226001, India.
| | - Satyendra Pratap Singh
- Division of Plant Microbe Interaction, Council of Scientific and Industrial Research-National Botanical Research Institute, Lucknow, 226001, India; Department of Microbiology, Mewar University, Gangrar, Chittorgarh, Rajasthan, 312901, India
| | - Sahil Mahfooz
- Division of Plant Microbe Interaction, Council of Scientific and Industrial Research-National Botanical Research Institute, Lucknow, 226001, India
| | - Arpita Bhattacharya
- Division of Plant Microbe Interaction, Council of Scientific and Industrial Research-National Botanical Research Institute, Lucknow, 226001, India
| | - Nishtha Mishra
- Division of Plant Microbe Interaction, Council of Scientific and Industrial Research-National Botanical Research Institute, Lucknow, 226001, India
| | - Pramod Arvind Shirke
- Plant Physiology Lab, CSIR-National Botanical Research Institute, Rana Pratap Marg, Lucknow, 226001, India.
| | - C S Nautiyal
- Division of Plant Microbe Interaction, Council of Scientific and Industrial Research-National Botanical Research Institute, Lucknow, 226001, India.
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18
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Vurukonda SSKP, Giovanardi D, Stefani E. Plant Growth Promoting and Biocontrol Activity of Streptomyces spp. as Endophytes. Int J Mol Sci 2018; 19:E952. [PMID: 29565834 PMCID: PMC5979581 DOI: 10.3390/ijms19040952] [Citation(s) in RCA: 210] [Impact Index Per Article: 35.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2018] [Revised: 03/12/2018] [Accepted: 03/16/2018] [Indexed: 01/12/2023] Open
Abstract
There has been many recent studies on the use of microbial antagonists to control diseases incited by soilborne and airborne plant pathogenic bacteria and fungi, in an attempt to replace existing methods of chemical control and avoid extensive use of fungicides, which often lead to resistance in plant pathogens. In agriculture, plant growth-promoting and biocontrol microorganisms have emerged as safe alternatives to chemical pesticides. Streptomyces spp. and their metabolites may have great potential as excellent agents for controlling various fungal and bacterial phytopathogens. Streptomycetes belong to the rhizosoil microbial communities and are efficient colonizers of plant tissues, from roots to the aerial parts. They are active producers of antibiotics and volatile organic compounds, both in soil and in planta, and this feature is helpful for identifying active antagonists of plant pathogens and can be used in several cropping systems as biocontrol agents. Additionally, their ability to promote plant growth has been demonstrated in a number of crops, thus inspiring the wide application of streptomycetes as biofertilizers to increase plant productivity. The present review highlights Streptomyces spp.-mediated functional traits, such as enhancement of plant growth and biocontrol of phytopathogens.
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Affiliation(s)
| | - Davide Giovanardi
- Department of Life Sciences, University of Modena and Reggio Emilia, via Amendola 2, 42122 Reggio Emilia, Italy.
| | - Emilio Stefani
- Department of Life Sciences, University of Modena and Reggio Emilia, via Amendola 2, 42122 Reggio Emilia, Italy.
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Veliz EA, Martínez-Hidalgo P, Hirsch AM. Chitinase-producing bacteria and their role in biocontrol. AIMS Microbiol 2017; 3:689-705. [PMID: 31294182 PMCID: PMC6604996 DOI: 10.3934/microbiol.2017.3.689] [Citation(s) in RCA: 86] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2017] [Accepted: 07/19/2017] [Indexed: 11/30/2022] Open
Abstract
Chitin is an important component of the exteriors of insects and fungi. Upon degradation of chitin by a number of organisms, severe damage and even death may occur in pathogens and pests whose external surfaces contain this polymer. Currently, chemical fungicides and insecticides are the major means of controlling these disease-causing agents. However, due to the potential harm that these chemicals cause to the environment and to human and animal health, new strategies are being developed to replace or reduce the use of fungal- and pest-killing compounds in agriculture. In this context, chitinolytic microorganisms are likely to play an important role as biocontrol agents and pathogen antagonists and may also function in the control of postharvest rot. In this review, we discuss the literature concerning chitin and the basic knowledge of chitin-degrading enzymes, and also describe the biocontrol effects of chitinolytic microorganisms and their potential use as more sustainable pesticides and fungicides in the field.
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Affiliation(s)
- Esteban A Veliz
- Department of Molecular Cell and Developmental Biology, Molecular Biology Institute, University of California, Los Angeles, 90095-1606, USA
| | | | - Ann M Hirsch
- Department of Molecular Cell and Developmental Biology, Molecular Biology Institute, University of California, Los Angeles, 90095-1606, USA
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20
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Rostami A, Hinc K, Goshadrou F, Shali A, Bayat M, Hassanzadeh M, Amanlou M, Eslahi N, Ahmadian G. Display of B. pumilus chitinase on the surface of B. subtilis spore as a potential biopesticide. PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY 2017; 140:17-23. [PMID: 28755689 DOI: 10.1016/j.pestbp.2017.05.008] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2016] [Revised: 04/09/2017] [Accepted: 05/30/2017] [Indexed: 06/07/2023]
Abstract
BACKGROUND Chitinases can inhibit the growth of many fungal diseases which are a great threat for global agricultural production. Biological control of pathogens like fungi, is believed to be one of the best ways to eliminate the adverse effects of plant pathogens. To this end, we expressed and displayed a chitinase from Bacillus pumilus (ChiS) on the surface of Bacillus subtilis spores, as a biocontrol agent. RESULT ChiS enzyme from B. pumilus was expressed on the spores of B. subtilis using CotG as a carrier protein. Immunofluorescence microscopy confirmed the expression of ChiS on the surface of the spores. Enzyme activity assay showed that the surface displayed ChiS was active and was also able to inhibit the growth of Rhizoctonia solani and Trichoderma harzianum fungi. Western blot analysis also indicated that CotG-ChiS is partially processed after display. Molecular dynamics simulation showed that the stability of the heterologous protein was decreased after fusion. CONCLUSION ChiS was successfully displayed on the surface of Bacillus spores by fusion to the CotG, one of the main spore coat proteins. In-vitro experiments showed that the displayed enzyme was effective in growth inhibition of R. solani and T. harzianum fungi.
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Affiliation(s)
- Amin Rostami
- Department of Industrial and Environmental Biotechnology, National Institute of Genetics Engineering and Biotechnology (NIGEB), Tehran, Iran; Department of Physiology, School of Allied Medical Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Krzysztof Hinc
- Department of Medical Biotechnology, Intercollegiate Faculty of Biotechnology, UG-MUG, Gdansk, Poland
| | - Fatemeh Goshadrou
- Department of Physiology, School of Allied Medical Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Abbas Shali
- Department of Industrial and Environmental Biotechnology, National Institute of Genetics Engineering and Biotechnology (NIGEB), Tehran, Iran
| | - Mahdieh Bayat
- Department of Industrial and Environmental Biotechnology, National Institute of Genetics Engineering and Biotechnology (NIGEB), Tehran, Iran
| | - Malihe Hassanzadeh
- Department of Medicinal Chemistry, Drug Design and Development Research Center, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
| | - Massoud Amanlou
- Department of Medicinal Chemistry, Drug Design and Development Research Center, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
| | - Negin Eslahi
- Department of Industrial and Environmental Biotechnology, National Institute of Genetics Engineering and Biotechnology (NIGEB), Tehran, Iran
| | - Gholamreza Ahmadian
- Department of Industrial and Environmental Biotechnology, National Institute of Genetics Engineering and Biotechnology (NIGEB), Tehran, Iran.
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21
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Saeed EE, Sham A, Salmin Z, Abdelmowla Y, Iratni R, El-Tarabily K, AbuQamar S. Streptomyces globosus UAE1, a Potential Effective Biocontrol Agent for Black Scorch Disease in Date Palm Plantations. Front Microbiol 2017; 8:1455. [PMID: 28824584 PMCID: PMC5534479 DOI: 10.3389/fmicb.2017.01455] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2017] [Accepted: 07/18/2017] [Indexed: 12/21/2022] Open
Abstract
Many fungal diseases affect date palm causing considerable losses in date production worldwide. We found that the fungicide Cidely® Top inhibited the mycelial growth of the soil-borne pathogenic fungus Thielaviopsis punctulata, the causal agent of black scorch disease of date palm, both in vitro and in vivo. Because the use of biocontrol agents (BCAs) can minimize the impact of pathogen control on economic and environmental concerns related to chemical control, we aimed at testing local actinomycete strains isolated from the rhizosphere soil of healthy date palm cultivated in the United Arab Emirates (UAE) against T. punctulata. The selected isolate can thus be used as a potential agent for integrated disease management programs. In general, the BCA showed antagonism in vitro and in greenhouse experiments against this pathogen. The most promising actinomycete isolate screened showed the highest efficacy against the black scorch disease when applied before or at the same time of inoculation with T. punctulata, compared with BCA or fungicide application after inoculation. The nucleotide sequence and phylogenetic analyses using the 16S ribosomal RNA gene with other Streptomyces spp. in addition to morphological and cultural characteristics revealed that the isolated UAE strain belongs to Streptomyces globosus UAE1. The antagonistic activity of S. globosus against T. punctulata, was associated with the production by this strain of diffusible antifungal metabolites i.e., metabolites that can inhibit mycelial growth of the pathogen. This was evident in the responses of the vegetative growth of pure cultures of the pathogen when exposed to the culture filtrates of the BCA. Altogether, the pathogenicity tests, disease severity indices and mode of action tests confirmed that the BCA was not only capable of suppressing black scorch disease symptoms, but also could prevent the spread of the pathogen, as a potential practical method to improve disease management in the palm plantations. This is the first report of an actinomycete, naturally occurring in the UAE with the potential for use as a BCA in the management of the black scorch disease of date palms in the region.
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Affiliation(s)
| | | | | | | | | | - Khaled El-Tarabily
- Department of Biology, United Arab Emirates UniversityAl Ain, United Arab Emirates
| | - Synan AbuQamar
- Department of Biology, United Arab Emirates UniversityAl Ain, United Arab Emirates
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22
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Al Zoubi W, Al-Hamdani AAS, Ahmed SD, Ko YG. A new azo-Schiff base: Synthesis, characterization, biological activity and theoretical studies of its complexes. Appl Organomet Chem 2017. [DOI: 10.1002/aoc.3895] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Wail Al Zoubi
- School of Materials Science and Engineering; Yeungnam University; Gyeongsan 38541 Republic of Korea
| | | | - Susan Duraid Ahmed
- Department of Chemistry, College of Science for Women; Baghdad University; Baghdad Iraq
| | - Young Gun Ko
- School of Materials Science and Engineering; Yeungnam University; Gyeongsan 38541 Republic of Korea
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Plant growth-promoting actinobacteria: a new strategy for enhancing sustainable production and protection of grain legumes. 3 Biotech 2017; 7:102. [PMID: 28560641 DOI: 10.1007/s13205-017-0736-3] [Citation(s) in RCA: 72] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2016] [Accepted: 04/19/2017] [Indexed: 10/19/2022] Open
Abstract
Grain legumes are a cost-effective alternative for the animal protein in improving the diets of the poor in South-East Asia and Africa. Legumes, through symbiotic nitrogen fixation, meet a major part of their own N demand and partially benefit the following crops of the system by enriching soil. In realization of this sustainability advantage and to promote pulse production, United Nations had declared 2016 as the "International Year of pulses". Grain legumes are frequently subjected to both abiotic and biotic stresses resulting in severe yield losses. Global yields of legumes have been stagnant for the past five decades in spite of adopting various conventional and molecular breeding approaches. Furthermore, the increasing costs and negative effects of pesticides and fertilizers for crop production necessitate the use of biological options of crop production and protection. The use of plant growth-promoting (PGP) bacteria for improving soil and plant health has become one of the attractive strategies for developing sustainable agricultural systems due to their eco-friendliness, low production cost and minimizing consumption of non-renewable resources. This review emphasizes on how the PGP actinobacteria and their metabolites can be used effectively in enhancing the yield and controlling the pests and pathogens of grain legumes.
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Suriya J, Bharathiraja S, Manivasagan P, Kim SK. Enzymes From Rare Actinobacterial Strains. ADVANCES IN FOOD AND NUTRITION RESEARCH 2016; 79:67-98. [PMID: 27770864 DOI: 10.1016/bs.afnr.2016.08.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Actinobacteria constitute rich sources of novel biocatalysts and novel natural products for medical and industrial utilization. Although actinobacteria are potential source of economically important enzymes, the isolation and culturing are somewhat tough because of its extreme habitats. But now-a-days, the rate of discovery of novel compounds producing actinomycetes from soil, freshwater, and marine ecosystem has increased much through the developed culturing and genetic engineering techniques. Actinobacteria are well-known source of their bioactive compounds and they are the promising source of broad range of industrially important enzymes. The bacteria have the capability to degrade a range of pesticides, hydrocarbons, aromatic, and aliphatic compounds (Sambasiva Rao, Tripathy, Mahalaxmi, & Prakasham, 2012). Most of the enzymes are mainly derived from microorganisms because of their easy of growth, minimal nutritional requirements, and low-cost for downstream processing. The focus of this review is about the new, commercially useful enzymes from rare actinobacterial strains. Industrial requirements are now fulfilled by the novel actinobacterial enzymes which assist the effective production. Oxidative enzymes, lignocellulolytic enzymes, extremozymes, and clinically useful enzymes are often utilized in many industrial processes because of their ability to catalyze numerous reactions. Novel, extremophilic, oxidative, lignocellulolytic, and industrially important enzymes from rare Actinobacterial population are discussed in this chapter.
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Affiliation(s)
- J Suriya
- School of Environmental Sciences, Bharathidasan University, Tiruchirappalli, Tamil Nadu, India
| | - S Bharathiraja
- CAS in Marine Biology, Annamalai University, Porto Novo, Tamil Nadu, India
| | - P Manivasagan
- Marine Bioprocess Research Center, Pukyong National University, Busan, Republic of Korea.
| | - S-K Kim
- Marine Bioprocess Research Center, Pukyong National University, Busan, Republic of Korea; Specialized Graduate School Science & Technology Convergence, Pukyong National University, Busan, Republic of Korea.
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Synthesis and investigation of thermal properties of vanadyl complexes with azo-containing Schiff-base dyes. JOURNAL OF SAUDI CHEMICAL SOCIETY 2016. [DOI: 10.1016/j.jscs.2012.08.001] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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26
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Aliabadi N, Aminzadeh S, Karkhane AA, Haghbeen K. Thermostable chitinase from Cohnella sp. A01: isolation and product optimization. Braz J Microbiol 2016; 47:931-940. [PMID: 27528085 PMCID: PMC5052389 DOI: 10.1016/j.bjm.2016.07.009] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2015] [Accepted: 04/04/2016] [Indexed: 11/28/2022] Open
Abstract
Twelve bacterial strains isolated from shrimp farming ponds were screened for their growth activity on chitin as the sole carbon source. The highly chitinolytic bacterial strain was detected by qualitative cup plate assay and tentatively identified to be Cohnella sp. A01 based on 16S rDNA sequencing and by matching the key morphological, physiological, and biochemical characteristics. The cultivation of Cohnella sp. A01 in the suitable liquid medium resulted in the production of high levels of enzyme. The colloidal chitin, peptone, and K2HPO4 represented the best carbon, nitrogen, and phosphorus sources, respectively. Enzyme production by Cohnella sp. A01 was optimized by the Taguchi method. Our results demonstrated that inoculation amount and temperature of incubation were the most significant factors influencing chitinase production. From the tested values, the best pH/temperature was obtained at pH 5 and 70°C, with Km and Vmax values of chitinase to be 5.6mg/mL and 0.87μmol/min, respectively. Ag+, Co2+, iodoacetamide, and iodoacetic acid inhibited the enzyme activity, whereas Mn2+, Cu2+, Tweens (20 and 80), Triton X-100, and EDTA increased the same. In addition, the study of the morphological alteration of chitin treated by enzyme by SEM revealed cracks and pores on the chitin surface, indicating a potential application of this enzyme in several industries.
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Affiliation(s)
- Nasrin Aliabadi
- National Institute of Genetic Engineering and Biotechnology, Department of Industrial and Environmental Biotechnology, Bioprocess Engineering Group, Tehran, Iran
| | - Saeed Aminzadeh
- National Institute of Genetic Engineering and Biotechnology, Department of Industrial and Environmental Biotechnology, Bioprocess Engineering Group, Tehran, Iran.
| | - Ali Asghar Karkhane
- National Institute of Genetic Engineering and Biotechnology, Department of Industrial and Environmental Biotechnology, Bioprocess Engineering Group, Tehran, Iran
| | - Kamahldin Haghbeen
- National Institute of Genetic Engineering and Biotechnology, Department of Industrial and Environmental Biotechnology, Bioprocess Engineering Group, Tehran, Iran
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Singh S, Gaur R. Evaluation of antagonistic and plant growth promoting activities of chitinolytic endophytic actinomycetes associated with medicinal plants against Sclerotium rolfsii
in chickpea. J Appl Microbiol 2016; 121:506-18. [DOI: 10.1111/jam.13176] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2016] [Revised: 03/30/2016] [Accepted: 05/03/2016] [Indexed: 11/28/2022]
Affiliation(s)
- S.P. Singh
- Department of Microbiology; Mewar University, Gangrar; Chittorgarh India
| | - R. Gaur
- Department of Microbiology; Mewar University, Gangrar; Chittorgarh India
- Department of Microbiology; Dr R. M. L. Avadh University; Faizabad India
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Kaur T, Kaur A, Sharma V, Manhas RK. Purification and Characterization of a New Antifungal Compound 10-(2,2-dimethyl-cyclohexyl)-6,9-dihydroxy-4,9-dimethyl-dec-2-enoic Acid Methyl Ester from Streptomyces hydrogenans Strain DH16. Front Microbiol 2016; 7:1004. [PMID: 27446043 PMCID: PMC4926525 DOI: 10.3389/fmicb.2016.01004] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2016] [Accepted: 06/13/2016] [Indexed: 11/15/2022] Open
Abstract
In agriculture, biocontrol agents have been emerged as safe alternative to chemical pesticides where Streptomyces spp. and their metabolites constitute a great potential for their exploration as potent agents for controlling various fungal phytopathogens. The present study reports an antifungal compound purified from Streptomyces hydrogenans strain DH16, a soil isolate, using silica gel chromatography and semi preparative HPLC. The compound was characterized using various spectroscopic techniques (IR, 1H and 13C NMR) and named 10-(2,2-dimethyl-cyclohexyl)-6,9-dihydroxy-4,9-dimethyl-dec-2-enoic acid methyl ester (SH2). Compound (SH2) showed significant inhibitory activity against fungal phytopathogens and resulted in severe morphological aberrations in their structure. Minimal inhibitory and minimal fungicidal concentrations of the compound ranged from 6.25 to 25 μg/ml and 25 to 50 μg/ml, respectively. In vivo evaluation of the compound showed strong control efficacy against Alternaria brassicicola, a seed borne pathogen, on radish seeds. In comparison to mancozeb and carbendazim, the compound was more effective in controlling damping off disease. Additionally, it promoted plant growth with increased rate of seed germination, and displayed no phytotoxicity. The compound retained its antifungal activity after its exposure to temperature of 100°C and sunlight for 1 h. Furthermore, the compound (SH2) when tested for its biosafety was found to be non-cytotoxic, and non-mutagenic against Salmonella typhimurium TA98 and TA100 strains. This compound from S. hydrogenans strain DH16 has not been reported earlier, so this new compound can be developed as an ideal safe and superior biofungicide for the control of various fungal plant diseases.
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Affiliation(s)
- Talwinder Kaur
- Department of Microbiology, Guru Nanak Dev University Amritsar, India
| | - Amarjeet Kaur
- Department of Microbiology, Guru Nanak Dev University Amritsar, India
| | - Vishal Sharma
- Department of Pharmaceutical Sciences, Guru Nanak Dev University Amritsar, India
| | - Rajesh K Manhas
- Department of Microbiology, Guru Nanak Dev University Amritsar, India
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Boughachiche F, Rachedi K, Duran R, Lauga BEA, Karama S, Bouyoucef, Boulezaz S, Boukrouma M, Boutaleb H, Boulahrouf A. Optimization of alkaline protease production by Streptomyces sp. strain isolated from saltpan environment. ACTA ACUST UNITED AC 2016. [DOI: 10.5897/ajb2016.15259] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
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30
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El-Megharbel SM. Ag(I), Cu(II), and Cd(II) sulfacetamide complexes: Synthesis, spectral, thermal study, and antimicrobial activity assessment. RUSS J GEN CHEM+ 2016. [DOI: 10.1134/s1070363216040368] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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31
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Abd El-Halim HF, Mohamed GG. Synthesis, spectroscopic studies, thermal analyses, biological activity of tridentate coordinated transition metal complexes of bi(pyridyl-2-ylmethyl)amine]ligand. J Mol Struct 2016. [DOI: 10.1016/j.molstruc.2015.09.030] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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32
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El-Megharbel SM, El-Metwaly NM, Refat MS. Synthesis of uranyl(II), vanadyl(II) and zirconyl urate complexes, spectral, thermal and biological studies. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2015; 149:263-270. [PMID: 25965173 DOI: 10.1016/j.saa.2015.04.069] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2014] [Revised: 03/21/2015] [Accepted: 04/22/2015] [Indexed: 06/04/2023]
Abstract
Three urate chelations were obtained when uric acid was reacted with UO2(CH3COO)2H2O, VOSO4·XH2O and ZrOCl2·XH2O salts with neutralized with 0.1 M NaOH aqueous media. The 1:2 metal-to-ligand complexes [(UO2)2(C5H2N4O3)2](H2O), [(ZrO)2(H2O)2(C5H2N4O3)2] and [VO((C5H3N4O3)2] were characterized by elemental analyses, molar conductivity, (infrared, Raman and UV-vis) spectra, effective magnetic moment in Bohr magnetons, and thermal analysis (TG/DTG). The urate ligand coordinates as mononegative bidentate donor towards the mononuclear central vanadium atom and coordinated as binegative tetradentate mode towards the binuclear dioxouranium and zirconyl centers. The antibacterial activity of the metal complexes were tested against some kind of bacteria and fungi strains and compared with uric acid. The ligand, ZrO(II) and UO2(II) complex showed a week potential degradation on calf thymus DNA, whereas VO(II) complex slightly degraded the DNA.
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Affiliation(s)
- Samy M El-Megharbel
- Department of Chemistry, Faculty of Science, Taif University, Taif 888, Saudi Arabia; Department of Chemistry, Faculty of Science, Zagazig University, Egypt
| | - Nashwa M El-Metwaly
- Department of Chemistry, Faculty of Science, Mansoura University, Egypt; Department of Chemistry, Faculty of Applied Science, Umm Al-Qura University, Makkah, Saudi Arabia
| | - Moamen S Refat
- Department of Chemistry, Faculty of Science, Taif University, Taif 888, Saudi Arabia; Department of Chemistry, Faculty of Science, Port Said University, Port Said, Egypt.
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33
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Ligational behavior of clioquinol antifungal drug towards Ag(I), Hg(II), Cr(III) and Fe(III) metal ions: Synthesis, spectroscopic, thermal, morphological and antimicrobial studies. J Mol Struct 2015. [DOI: 10.1016/j.molstruc.2014.12.081] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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34
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Zaky M, El-Sayed MY, El-Megharbel SM, Taleb SA, Refat MS. Synthesis, chemical structure elucidation, and biological studies on the effect of some vital metal ions on sulfadoxine. RUSS J GEN CHEM+ 2015. [DOI: 10.1134/s1070363215010314] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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35
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El-Megharbel SM, Hamza RZ, Refat MS. Synthesis, spectroscopic and thermal studies of Mg(II), Ca(II), Sr(II) and Ba(II) diclofenac sodium complexes as anti-inflammatory drug and their protective effects on renal functions impairment and oxidative stress. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2015; 135:915-928. [PMID: 25163458 DOI: 10.1016/j.saa.2014.07.101] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2014] [Revised: 07/12/2014] [Accepted: 07/29/2014] [Indexed: 06/03/2023]
Abstract
The main task of our present study is the preparation of newly complexes of Mg(II), Ca(II), Sr(II) and Ba(II) with diclofenac which succeeded to great extent in alleviating the side effects of diclofenac alone and ameliorating the kidney function parameters and antioxidant capacities with respect to diclofenac treated group alone. The Mg(II), Ca(II), Sr(II) and Ba(II) with diclofenac have been synthesized and characterized using infrared, electronic and (1)H NMR spectral, thermogravimetric and conductivity measurements. The diclofenac ligand has been found to act as bidentate chelating agent. Diclofenac complexes coordinate through the oxygen's of the carboxyl group. The molar ratio chelation is 1:2 (M(2+)-dic) with general formula [M(dic)2(H2O)2]⋅nH2O. Antibacterial screening of the alkaline earth metal complexes against Escherichia coli (Gram-ve), Bacillus subtilis (Gram+ve) and anti-fungal (Asperagillus oryzae, Asperagillus niger, Asperagillus flavus) were investigated. The kidney functions in male albino rats were ameliorated upon treatment with metal complexes of dic, which are represented by decreasing the levels of urea and uric acid to be located within normal values. The other looks bright spot in this article is the assessment of antioxidant defense system including SOD, CAT and MDA with the help of Sr(2+), Mg(2+) and Ca(2+)-dic complexes. The hormones related to kidney functions and stresses have been greatly ameliorated in groups treated with dic complexes in comparable with dic treated group.
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Affiliation(s)
- Samy M El-Megharbel
- Department of Chemistry, Faculty of Science, Taif University, Al-Haweiah, P.O. Box 888, Zip Code 21974, Taif, Saudi Arabia; Department of Chemistry, Faculty of Science, Zagazig University, Zagazig, Egypt
| | - Reham Z Hamza
- Department of Zoology, Faculty of Science, Zagazig University, Zagazig, Egypt
| | - Moamen S Refat
- Department of Chemistry, Faculty of Science, Taif University, Al-Haweiah, P.O. Box 888, Zip Code 21974, Taif, Saudi Arabia; Department of Chemistry, Faculty of Science, Port Said University, Port Said, Egypt.
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G. C. P, Yoo HY, Cho SS, Choi YH, Yoo JC. An Extracellular Chitinase from Streptomyces sp. CS147 Releases N-acetyl-d-glucosamine (GlcNAc) as Principal Product. Appl Biochem Biotechnol 2014; 175:372-86. [DOI: 10.1007/s12010-014-1267-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2014] [Accepted: 09/21/2014] [Indexed: 11/29/2022]
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Salman M, Refat MS, El-Korashy SA, Hussien MA. Synthesis and spectroscopic characterization of Zn(II), Cd(II), and Hg(II) ciprofloxacin complexes. RUSS J GEN CHEM+ 2014. [DOI: 10.1134/s1070363214090345] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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38
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Dai CH, Mao FL. Synthesis, structures, and antibacterial activity of Schiff-base cobalt(III) complexes. RUSS J COORD CHEM+ 2014. [DOI: 10.1134/s107032841402002x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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39
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40
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Zaky M, El-Sayed MY, El-Megharbel SM, Taleb SA, Refat MS. Complexes of nalidixic acid with some vital metal ions: Synthesis, chemical structure elucidation, and antimicrobial evaluation. RUSS J GEN CHEM+ 2014. [DOI: 10.1134/s1070363213120475] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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41
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Abd El-Wahed MG, El-Megharbel SM, El-Sayed MY, Zahran YM, Refat MS. Synthesis of several new lanthanide Glimepiride complexes for evaluation of microbial activity. RUSS J GEN CHEM+ 2014. [DOI: 10.1134/s1070363213120402] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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42
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Atta AH, El-Shenawy AI, Koura FA, Refat MS. Synthesis and Characterization of Some Selenium Nanometric Compounds: Spectroscopic, Biological and Antioxidant Assessments. ACTA ACUST UNITED AC 2014. [DOI: 10.4236/wjnse.2014.42009] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Vicencio AG, Santiago MT, Tsirilakis K, Stone A, Worgall S, Foley EA, Bush D, Goldman DL. Fungal sensitization in childhood persistent asthma is associated with disease severity. Pediatr Pulmonol 2014; 49:8-14. [PMID: 23401301 DOI: 10.1002/ppul.22779] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/28/2012] [Accepted: 11/03/2012] [Indexed: 11/09/2022]
Abstract
RATIONALE Recent observations, especially in adults, suggest that asthma severity may be associated with fungal sensitization. Other studies suggest that some patients with severe asthma and fungal sensitization may benefit from anti-fungal therapy. Currently, the prevalence of fungal sensitization among children with severe asthma is not well characterized. METHODS We determined prevalence of fungal sensitization among children with moderate to severe persistent asthma and compared clinical characteristics between sensitized and non-sensitized children, including asthma severity, serum immunoglobulin E, and pulmonary function. RESULTS Of the 64 children enrolled, 25 (39%) had evidence of sensitization to one or more fungi. Nineteen of 25 (76%) children with fungal sensitization were categorized as severe persistent compared to 13 of 39 (33%) children without evidence of fungal sensitization (odds ratio = 6.33, 95% confidence interval 2.04-19.68, P = 0.0014). Of 32 severe persistent asthmatics, 19 (59%) demonstrated evidence of fungal sensitization. Serum immunoglobulin E was significantly higher (P < 0.001), and pulmonary function (including FEV1, FEV1/FVC, and FEF25-75%) significantly lower in the fungal-sensitized patients (P = 0.016, 0.0004, and 0.002, respectively). Bronchial biopsy of sensitized children revealed basement membrane thickening and eosinophil infiltration. CONCLUSIONS Fungal sensitization in children with persistent asthma is associated with disease severity. Almost 60% of our severe persistent asthma patients had evidence of fungal sensitization and, based on our previous studies, may be potential candidates for anti-fungal therapy.
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Affiliation(s)
- Alfin G Vicencio
- Department of Pediatrics, Cohen Children's Medical Center, New Hyde Park, New York
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KAKKAR RITA, BHANDARI MAMTA, GABA RITU. DFT STUDY OF SOME TRIVALENT d- AND f-BLOCK METAL ION COMPLEXES OF ALLOXAN. JOURNAL OF THEORETICAL & COMPUTATIONAL CHEMISTRY 2013. [DOI: 10.1142/s0219633613500521] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Density functional calculations have been employed to elucidate the structures of some six coordinated complexes of alloxan monohydrate with some d- and f-block metals. Alloxan monohydrate may exist in the mono-ionized or di-ionized form in its complexes, and both states were investigated. It is found that when the metal ion is coordinated to three bidentate ligands, the structures are nearly trigonal prismatic, but replacement of a bidendate ligand by two monovalent ligands changes the geometry to deformed octahedral. The metal-alloxanate bonding is largely ionic for the lanthanoids. The calculated vibrational frequencies are in agreement with the experimentally determined ones.
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Affiliation(s)
- RITA KAKKAR
- Department of Chemistry, University of Delhi, Delhi-110 007, India
| | - MAMTA BHANDARI
- Department of Chemistry, University of Delhi, Delhi-110 007, India
| | - RITU GABA
- Department of Chemistry, University of Delhi, Delhi-110 007, India
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45
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Swiontek Brzezinska M, Jankiewicz U, Burkowska A. Purification and characterization of Streptomyces albidoflavus antifungal components. APPL BIOCHEM MICRO+ 2013. [DOI: 10.1134/s0003683813050025] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Abstract
Biological control of phytopathogenic fungi and insects continues to inspire the research and development of environmentally friendly bioactive alternatives. Potentially lytic enzymes, chitinases can act as a biocontrol agent against agriculturally important fungi and insects. The cell wall in fungi and protective covers, i.e. cuticle in insects shares a key structural polymer, chitin, a β-1,4-linked N-acetylglucosamine polymer. Therefore, it is advantageous to develop a common biocontrol agent against both of these groups. As chitin is absent in plants and mammals, targeting its metabolism will signify an eco-friendly strategy for the control of agriculturally important fungi and insects but is innocuous to mammals, plants, beneficial insects and other organisms. In addition, development of chitinase transgenic plant varieties probably holds the most promising method for augmenting agricultural crop protection and productivity, when properly integrated into traditional systems. Recently, human proteins with chitinase activity and chitinase-like proteins were identified and established as biomarkers for human diseases. This review covers the recent advances of chitinases as a biocontrol agent and its various applications including preparation of medically important chitooligosaccharides, bioconversion of chitin as well as in implementing chitinases as diagnostic and prognostic markers for numerous diseases and the prospect of their future utilization.
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Affiliation(s)
- Anand Nagpure
- University School of Biotechnology, Guru Gobind Singh Indraprastha University , New Delhi , India
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Alghool S, Zoromba MS, El-Halim HFA. Lanthanide amino acid Schiff base complexes: synthesis, spectroscopic characterization, physical properties and in vitro antimicrobial studies. J RARE EARTH 2013. [DOI: 10.1016/s1002-0721(12)60347-0] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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48
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Isolation of novel chitinolytic bacteria and production optimization of extracellular chitinase. JOURNAL OF GENETIC ENGINEERING AND BIOTECHNOLOGY 2013. [DOI: 10.1016/j.jgeb.2013.03.001] [Citation(s) in RCA: 128] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Alghool S, Abd El-Halim HF, Abd El-sadek MS, Yahia IS, Wahab LA. Synthesis, thermal characterization, and antimicrobial activity of lanthanum, cerium, and thorium complexes of amino acid Schiff base ligand. JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY 2013; 112:671-681. [DOI: 10.1007/s10973-012-2628-4] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/01/2023]
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Dai CH, Mao FL. Structure of a new schiff base cobalt(III) complex with antibacterial activity. J STRUCT CHEM+ 2013. [DOI: 10.1134/s0022476613030244] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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