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Zhang X, Sun J, Zhao M. Enhanced metronidazole removal by binary-species photoelectrogenic biofilm of microaglae and anoxygenic phototrophic bacteria. J Environ Sci (China) 2022; 115:25-36. [PMID: 34969452 DOI: 10.1016/j.jes.2021.07.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Revised: 07/14/2021] [Accepted: 07/14/2021] [Indexed: 06/14/2023]
Abstract
High efficient removal of antibiotics during nutriments recovery for biomass production poses a major technical challenge for photosynthetic microbial biofilm-based wastewater treatment since antibiotics are always co-exist with nutriments in wastewater and resist biodegradation due to their strong biotoxicity and recalcitrance. In this study, we make a first attempt to enhance metronidazole (MNZ) removal from wastewater using electrochemistry-activated binary-species photosynthetic biofilm of Rhodopseudomonas Palustris (R. Palustris) and Chlorella vulgaris (C. vulgaris) by cultivating them under different applied potentials. The results showed that application of external potentials of -0.3, 0 and 0.2 V led to 11, 33 and 26-fold acceleration in MNZ removal, respectively, as compared to that of potential free. The extent of enhancement in MNZ removal was positively correlated to the intensities of photosynthetic current produced under different externally applied potentials. The binary-species photoelectrogenic biofilm exhibited 18 and 6-fold higher MNZ removal rate than that of single-species of C. vulgaris and R. Palustris, respectively, due to the enhanced metabolic interaction between them. Application of an external potential of 0V significantly promoted the accumulation of tryptophan and tyrosine-like compounds as well as humic acid in extracellular polymeric substance, whose concentrations were 7.4, 7.1 and 2.0-fold higher than those produced at potential free, contributing to accelerated adsorption and reductive and photosensitive degradation of MNZ.
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Affiliation(s)
- Xubin Zhang
- Guangzhou Key Laboratory of Environmental Catalysis and Pollution Control, Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China
| | - Jian Sun
- Guangzhou Key Laboratory of Environmental Catalysis and Pollution Control, Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China.
| | - Mengmeng Zhao
- Guangzhou Key Laboratory of Environmental Catalysis and Pollution Control, Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, School of Environmental Science and Engineering, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China
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2
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The periodic table of photosynthetic purple non-sulfur bacteria: intact cell-metal ions interactions. Photochem Photobiol Sci 2021; 21:101-111. [PMID: 34748197 DOI: 10.1007/s43630-021-00116-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2021] [Accepted: 10/12/2021] [Indexed: 10/19/2022]
Abstract
Photosynthetic purple non-sulfur bacteria (PNB) have been widely utilized as model organisms to study bacterial photosynthesis. More recently, the remarkable resistance of these microorganisms to several metals ions called particular interest. As a result, several research efforts were directed toward clarifying the interactions of metal ions with PNB. The mechanisms of metal ions active uptake and bioabsorption have been studied in detail, unveiling that PNB enable harvesting and removing various toxic ions, thus fostering applications in environmental remediation. Herein, we present the most important achievements in the understanding of intact cell-metal ions interactions and the approaches utilized to study such processes. Following, the application of PNB-metal ions interactions toward metal removal from contaminated environments is presented. Finally, the possible coupling of PNB with abiotic electrodes to obtain biohybrid electrochemical systems is proposed as a sustainable pathway to tune and enhance metal removal and monitoring.
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3
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Stephens S, Mahadevan R, Allen DG. Engineering Photosynthetic Bioprocesses for Sustainable Chemical Production: A Review. Front Bioeng Biotechnol 2021; 8:610723. [PMID: 33490053 PMCID: PMC7820810 DOI: 10.3389/fbioe.2020.610723] [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: 09/27/2020] [Accepted: 12/01/2020] [Indexed: 11/13/2022] Open
Abstract
Microbial production of chemicals using renewable feedstocks such as glucose has emerged as a green alternative to conventional chemical production processes that rely primarily on petroleum-based feedstocks. The carbon footprint of such processes can further be reduced by using engineered cells that harness solar energy to consume feedstocks traditionally considered to be wastes as their carbon sources. Photosynthetic bacteria utilize sophisticated photosystems to capture the energy from photons to generate reduction potential with such rapidity and abundance that cells often cannot use it fast enough and much of it is lost as heat and light. Engineering photosynthetic organisms could enable us to take advantage of this energy surplus by redirecting it toward the synthesis of commercially important products such as biofuels, bioplastics, commodity chemicals, and terpenoids. In this work, we review photosynthetic pathways in aerobic and anaerobic bacteria to better understand how these organisms have naturally evolved to harness solar energy. We also discuss more recent attempts at engineering both the photosystems and downstream reactions that transfer reducing power to improve target chemical production. Further, we discuss different methods for the optimization of photosynthetic bioprocess including the immobilization of cells and the optimization of light delivery. We anticipate this review will serve as an important resource for future efforts to engineer and harness photosynthetic bacteria for chemical production.
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Affiliation(s)
- Sheida Stephens
- Department of Chemical Engineering and Applied Chemistry, University of Toronto, Toronto, ON, Canada
| | - Radhakrishnan Mahadevan
- Department of Chemical Engineering and Applied Chemistry, University of Toronto, Toronto, ON, Canada.,Institute of Biomedical Engineering, University of Toronto, Toronto, ON, Canada
| | - D Grant Allen
- Department of Chemical Engineering and Applied Chemistry, University of Toronto, Toronto, ON, Canada
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4
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Wu P, Zhang X, Niu T, Wang Y, Liu R, Zhang Y. The imidacloprid remediation, soil fertility enhancement and microbial community change in soil by Rhodopseudomonas capsulata using effluent as carbon source. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2020; 267:114254. [PMID: 32911333 DOI: 10.1016/j.envpol.2020.114254] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2019] [Revised: 02/09/2020] [Accepted: 02/21/2020] [Indexed: 05/20/2023]
Abstract
The effects of Rhodopseudomonas capsulata (R. capsulata) in the treated effluent of soybean processing wastewater (SPW) on the remediation of imidacloprid in soil, soil fertility, and the microbial community structure in soil were studied. Compared with the control group, with the addition of effluent containing R. capsulata, imidacloprid was effectively removed, soil fertility was enhanced, and the microbial community structure was improved. Molecular analysis indicated that imidacloprid could exert induction effects on expression of cpm gene and regulation effects on the synthesis of cytochrome P450 monooxygenases (P450) by activating HKs gene in two-component system (TCS). For R. capsulata, this induction process required 1 day. The synthesis of P450 occurred 1 day after inoculation, because R. capsulata are a type of archaea and imidacloprid is an environmental stress. Before expression of the cpm gene and synthesis of P450, R. capsulata need a period of time to adapt to external imidacloprid stimulation. However, the lack of organic matter in the soil cannot sustain R. capsulata growth for more than 1 day. In four groups with added effluent, the remaining organic matter in the effluent provided a sufficient carbon source and energy for R. capsulata. Five days later, the microbial community structure was improved by R. capsulata in the soil. The new technique could be used to remediate imidacloprid, enhance soil fertility, treat SPW and realize the recycling and reuse of wastewater and R. capsulata cells.
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Affiliation(s)
- Pan Wu
- School of Environment and Resources, Dalian Minzu University, Dalian, 116600, China; School of Resources and Environment, Northeast Agricultural University, Harbin, 150030, China
| | - Xuewei Zhang
- School of Environment and Resources, Dalian Minzu University, Dalian, 116600, China
| | - Tong Niu
- School of Environment and Resources, Dalian Minzu University, Dalian, 116600, China
| | - Yanling Wang
- Department of Anesthesiology, The Third Affiliated Hospital of SunYat-Sen University, Guangzhou, 510630, China
| | - Rijia Liu
- School of Environment and Resources, Dalian Minzu University, Dalian, 116600, China.
| | - Ying Zhang
- School of Environment and Resources, Dalian Minzu University, Dalian, 116600, China.
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5
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Wu P, Liu Y, Song X, Wang Y, Sheng L, Wang H, Zhang Y. Rhodopseudomonas sphaeroides treating mesosulfuron-methyl waste-water. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2020; 262:114166. [PMID: 32443208 DOI: 10.1016/j.envpol.2020.114166] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2019] [Revised: 01/23/2020] [Accepted: 02/10/2020] [Indexed: 06/11/2023]
Abstract
The soybean processing wastewater (SPW) supplementation to facilitate the simultaneously treatment (SPW and mesosulfuron-methyl) of wastewater and production of biological substances by Rhodopseudomonas sphaeroides (R. sphaeroides) was discussed. Compared with the control group, with the addition of SPW, mesosulfuron-methyl was removed, and the yields of single-cell proteins, carotenoids, and bacteriochlorophyll were increased. In the 3 mg/L dose group, the mesosulfuron-methyl removal rate reached 97% after 5 days. Molecular analysis revealed that mesosulfuron-methyl exhibited induction effects on expression of the cpm gene and regulation effects on the synthesis of cytochrome P450 monooxygenases (P450) by activating HKs gene in TCS signal transduction pathway. For R. sphaeroides, this induction process required 1 day. The synthesis of P450 occurred 1 day after inoculation. Prior to expressing cpm gene and synthesizing P450, R. sphaeroides need a period of time to adapt to external mesosulfuron-methyl stimulation. However, the R. sphaeroides growth could not be maintained for more than 1 day due to the lack of organic matter in the raw wastewater. The SPW supplementation provided a sufficient carbon source in four groups with added SPW. After 5 days, R. sphaeroides became the dominant microflora in the wastewater. This new method could complete the treatment of mixed wastewater, the increased of biological substances output and the reuse of wastewater and R. sphaeroides cells as resources at the same time.
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Affiliation(s)
- Pan Wu
- School of Environment and Resources, Dalian Minzu University, Dalian, 116600, China; School of Resources and Environment, Northeast Agricultural University, Harbin, 150030, China
| | - Yuxin Liu
- School of Environment and Resources, Dalian Minzu University, Dalian, 116600, China; School of Resources and Environment, Northeast Agricultural University, Harbin, 150030, China
| | - Xue Song
- School of Environment and Resources, Dalian Minzu University, Dalian, 116600, China; School of Resources and Environment, Northeast Agricultural University, Harbin, 150030, China
| | - Yanling Wang
- Department of Anesthesiology, The Third Affiliated Hospital of SunYat-Sen University, Guangzhou, 510630, China
| | - Luying Sheng
- School of Environment and Resources, Dalian Minzu University, Dalian, 116600, China; School of Resources and Environment, Northeast Agricultural University, Harbin, 150030, China.
| | - Haimei Wang
- School of Environment and Resources, Dalian Minzu University, Dalian, 116600, China; School of Resources and Environment, Northeast Agricultural University, Harbin, 150030, China.
| | - Ying Zhang
- School of Environment and Resources, Dalian Minzu University, Dalian, 116600, China; School of Resources and Environment, Northeast Agricultural University, Harbin, 150030, China.
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6
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Gaffney EM, Grattieri M, Beaver K, Pham J, McCartney C, Minteer SD. Unveiling salinity effects on photo-bioelectrocatalysis through combination of bioinformatics and electrochemistry. Electrochim Acta 2020; 337. [PMID: 32308212 DOI: 10.1016/j.electacta.2020.135731] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Little is known about the adaptation strategies utilized by photosynthetic microorganisms to cope with salinity changes happening in the environment, and the effects on microbial electrochemical technologies. Herein, bioinformatics analysis revealed a metabolism shift in Rhodobacter capsulatus resulting from salt stress, with changes in gene expression allowing accumulation of compatible solutes to balance osmotic pressure, together with the up-regulation of the nitrogen fixation cycle, an electron sink of the photosynthetic electron transfer chain. Using the transcriptome evidence of hindered electron transfer in the photosynthetic electron transport chain induced by adaption to salinity, increased understanding of photo-bioelectrocatalysis under salt stress is achieved. Accumulation of glycine-betaine allows immediate tuning of salinity tolerance but does not provide cell stabilization, with a 40 ± 20% loss of photo-bioelectrocatalysis in a 60 min time scale. Conversely, exposure to or inducing the expression of the Rhodobacter capsulatus gene transfer agent tunes salinity tolerance and increases cell stability. This work provides a proof of concept for the combination of bioinformatics and electrochemical tools to investigate microbial electrochemical systems, opening exciting future research opportunities.
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Affiliation(s)
- Erin M Gaffney
- Department of Chemistry, University of Utah, 315 S 1400 E Room 2020, Salt Lake City, 84112, Utah, USA
| | - Matteo Grattieri
- Department of Chemistry, University of Utah, 315 S 1400 E Room 2020, Salt Lake City, 84112, Utah, USA
| | - Kevin Beaver
- Department of Chemistry, University of Utah, 315 S 1400 E Room 2020, Salt Lake City, 84112, Utah, USA
| | - Jennie Pham
- Department of Chemistry, University of Utah, 315 S 1400 E Room 2020, Salt Lake City, 84112, Utah, USA
| | - Caitlin McCartney
- Department of Chemistry, University of Utah, 315 S 1400 E Room 2020, Salt Lake City, 84112, Utah, USA.,Departments of Chemistry, Brown University, 324 Brook Street Box H, Providence, 02912, Rhode Island, USA
| | - Shelley D Minteer
- Department of Chemistry, University of Utah, 315 S 1400 E Room 2020, Salt Lake City, 84112, Utah, USA
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7
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Wu P, Zhang Q, Wang Y, Zhang Y, Chen Z, Cao B, Wu Y, Zhu F, Li N. RETRACTED: Clothianidin wastewater treatment and the accumulation of high-value biochemical by Rhodopseudomonas spheroides. BIORESOURCE TECHNOLOGY 2019; 294:122073. [PMID: 31521982 DOI: 10.1016/j.biortech.2019.122073] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/04/2019] [Revised: 08/21/2019] [Accepted: 08/24/2019] [Indexed: 06/10/2023]
Abstract
This article has been retracted: please see Elsevier Policy on Article Withdrawal (https://www.elsevier.com/about/our-business/policies/article-withdrawal). This article has been retracted at the request of the Authors and the Editor-in-Chief. The paper is retracted because of a high level of duplication of "Rhodopseudomonas palustris wastewater treatment: cyhalofop-butyl removal, biochemicals production and mathematical model establishment. Bioresource. Tech. 2019, 282: 390-397 As such this article represents a severe abuse of the scientific publishing system. The scientific community takes a very strong view on this matter and apologies are offered to readers of the journal that this was not detected during the submission process. The first author, Pan Wu, takes full responsibility for these actions, a stance supported by Dalian Minzu University and Northeast Agricultural University, Harbin, where the research took place.
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Affiliation(s)
- Pan Wu
- School of Environment and Resources, Dalian Minzu University, Dalian116600, China; School of Resources and Environment, Northeast Agricultural University, Harbin150030, China
| | - Qian Zhang
- School of Environment and Resources, Dalian Minzu University, Dalian116600, China
| | - Yanling Wang
- Department of Anesthesiology, the Third Affiliated Hospital of SunYat-Sen University, Guangzhou510630, China
| | - Ying Zhang
- School of Environment and Resources, Dalian Minzu University, Dalian116600, China; School of Resources and Environment, Northeast Agricultural University, Harbin150030, China.
| | - Zhaobo Chen
- School of Environment and Resources, Dalian Minzu University, Dalian116600, China; School of Resources and Environment, Northeast Agricultural University, Harbin150030, China
| | - Bo Cao
- School of Environment and Resources, Dalian Minzu University, Dalian116600, China; School of Resources and Environment, Northeast Agricultural University, Harbin150030, China
| | - Yuan Wu
- School of Environment and Resources, Dalian Minzu University, Dalian116600, China; School of Resources and Environment, Northeast Agricultural University, Harbin150030, China
| | - Feifei Zhu
- Forest and Wastewater Ecology, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang110164, China
| | - Ning Li
- School of Environment and Resources, Dalian Minzu University, Dalian116600, China; School of Resources and Environment, Northeast Agricultural University, Harbin150030, China
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8
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Wu P, Mo W, Chen Z, Wang Y, Cui Y, Zhang Y, Song Y, Jin L, Hou Y, Zhu F, Cao B, Li N. The removal of cyhalofop-butyl in soil by surplus Rhodopseudanonas palustris in wastewater purification. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2019; 245:168-172. [PMID: 31152960 DOI: 10.1016/j.jenvman.2019.03.027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2018] [Revised: 03/04/2019] [Accepted: 03/06/2019] [Indexed: 06/09/2023]
Abstract
The biorestoration of cyhalofop-butyl and fertility in soil using Rhodopseudanonas palustris (R. palustris) in the treated wastewater were investigated in this research. Cyhalofop-butyl was not degraded under control group. The treated wastewater containing R. palustris degraded cyhalofop-butyl and remediated fertility. Interestingly, the cyhalofop-butyl-hydrolyzing carboxylesterase gene was expressed after inoculation 24 h. Subsequently, the cyhalofop-butyl-hydrolyzing carboxylesterase were synthesized to degrade cyhalofop-butyl. The cyhalofop-butyl started to be degraded after inoculation 24 h. The cyhalofop-butyl as stimulus signal induced cyhalofop-butyl-hydrolyzing carboxylesterase gene expression through signal transduction pathway. This process took 24 h for R. palustris as they were ancient bacteria. The residual organics in the wastewater provided sufficient carbon sources and energy for R. palustris under three dosage groups. The new method completed the remediation of cyhalofop-butyl pollution, the improvement of soil fertility and soybean processing wastewater treatment simultaneously, and realized the resource reutilization of wastewater and R. palustris as sludge.
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Affiliation(s)
- Pan Wu
- School of Environment and Resources, Dalian Minzu University, Dalian, 116600, China; School of Resources and Environment, Northeast Agricultural University, Harbin, 150030, China
| | - WenTao Mo
- School of Environment and Resources, Dalian Minzu University, Dalian, 116600, China
| | - Zhaobo Chen
- School of Environment and Resources, Dalian Minzu University, Dalian, 116600, China
| | - Yanling Wang
- Department of Anesthesiology, The Third Affiliated Hospital of SunYat-Sen University, Guangzhou, 510630, China
| | - Yubo Cui
- School of Environment and Resources, Dalian Minzu University, Dalian, 116600, China.
| | - Ying Zhang
- School of Environment and Resources, Dalian Minzu University, Dalian, 116600, China; School of Resources and Environment, Northeast Agricultural University, Harbin, 150030, China.
| | - Yantao Song
- School of Environment and Resources, Dalian Minzu University, Dalian, 116600, China
| | - Liming Jin
- School of Environment and Resources, Dalian Minzu University, Dalian, 116600, China
| | - Yanxi Hou
- School of Environment and Resources, Dalian Minzu University, Dalian, 116600, China
| | - Feifei Zhu
- Forest and Soil Ecology, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, 110164, China
| | - Bo Cao
- School of Resources and Environment, Northeast Agricultural University, Harbin, 150030, China
| | - Ning Li
- School of Environment and Resources, Dalian Minzu University, Dalian, 116600, China; School of Resources and Environment, Northeast Agricultural University, Harbin, 150030, China
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Wu P, Han Z, Mo W, Wu X, Chen Z, Zhang Y, Wang Y, Cui Y, Dong Y, Sun H, Zou X. Soybean processing wastewater supported the removal of propyzamide and biochemical accumulation from wastewater by Rhodopseudomonas capsulata. Bioprocess Biosyst Eng 2019; 42:1375-1384. [PMID: 31172262 DOI: 10.1007/s00449-019-02137-2] [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: 08/13/2018] [Accepted: 12/15/2018] [Indexed: 11/25/2022]
Abstract
Simultaneous (SPW and propyzamide) wastewater treatment and the production of biochemicals by Rhodopseudomonas capsulata (R. capsulata) were investigated with supplement of soybean processing wastewater (SPW). Compared to control group, propyzamide was removed and biochemicals production were enhanced with the supplement of SPW. Propyzamide induced camH gene expression through activating MAPKKKs gene in MAPK signal transduction pathway. The induction of camH gene and CamH occurs after 1 day for R. capsulata. However, lack of organics in original wastewater did not maintain R. capsulata growth for over 1 day. The supplement of SPW provided sufficient carbon source for R. capsulata under three addition dosages. This new method resulted in the mixed (SPW and propyzamide) wastewater treatment and improvement of biochemicals simultaneously, as well as the realization of reutilization of wastewater and R. capsulata as sludge. Meanwhile, high-order nonlinear mathematical model of the relationship between propyzamide removal rate, Xt and Xt/r, was established.
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Affiliation(s)
- Pan Wu
- School of Environment and Resources, Dalian Minzu University, Dalian, 116600, China
- School of Resources and Environment, Northeast Agricultural University, Harbin, 150030, China
| | - Ziqiao Han
- School of Environment and Resources, Dalian Minzu University, Dalian, 116600, China
| | - Wentao Mo
- School of Environment and Resources, Dalian Minzu University, Dalian, 116600, China
| | - Xiaozhen Wu
- School of Environment and Resources, Dalian Minzu University, Dalian, 116600, China
| | - Zhaobo Chen
- School of Environment and Resources, Dalian Minzu University, Dalian, 116600, China.
- School of Resources and Environment, Northeast Agricultural University, Harbin, 150030, China.
| | - Ying Zhang
- School of Environment and Resources, Dalian Minzu University, Dalian, 116600, China.
- School of Resources and Environment, Northeast Agricultural University, Harbin, 150030, China.
| | - Yanling Wang
- Department of Anesthesiology, The Third Affiliated Hospital of Sun Yat-Sen University, Guangzhou, 510630, China
| | - Yubo Cui
- School of Environment and Resources, Dalian Minzu University, Dalian, 116600, China
| | - Yuying Dong
- School of Environment and Resources, Dalian Minzu University, Dalian, 116600, China
- School of Resources and Environment, Northeast Agricultural University, Harbin, 150030, China
| | - Hongjie Sun
- School of Environment and Resources, Dalian Minzu University, Dalian, 116600, China
- School of Resources and Environment, Northeast Agricultural University, Harbin, 150030, China
| | - Xuejun Zou
- School of Environment and Resources, Dalian Minzu University, Dalian, 116600, China
- School of Resources and Environment, Northeast Agricultural University, Harbin, 150030, China
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10
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Assessing the Stimulatory Effect of Indole-3-Acetic Acid on Growth and Sustenance of Yeasts Isolated from Traditional Fermentative Sources Maintained by Six Ethnic Communities of Asssam, North-East India. JOURNAL OF PURE AND APPLIED MICROBIOLOGY 2019. [DOI: 10.22207/jpam.13.2.27] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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11
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Wu P, Chen Z, Zhang Y, Wang Y, Zhu F, Cao B, Wu Y, Li N. Rhodopseudomonas palustris wastewater treatment: Cyhalofop-butyl removal, biochemicals production and mathematical model establishment. BIORESOURCE TECHNOLOGY 2019; 282:390-397. [PMID: 30884459 DOI: 10.1016/j.biortech.2018.11.087] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2018] [Revised: 11/22/2018] [Accepted: 11/23/2018] [Indexed: 06/09/2023]
Abstract
Simultaneous (SPW and cyhalofop-butyl) wastewater treatment and the production of biochemicals by Rhodopseudomonas palustris (R. palustris) was investigated with supplementation of soybean processing wastewater (SPW). Compared to control group, cyhalofop-butyl was removed and single cell protein, carotenoid, bacteriochlorophyll productions were enhanced with the supplementation of SPW. Cyhalofop-butyl removal reached 100% after 5 days under 4000 mg/L COD group. Cyhalofop-butyl induced chbH gene expression to synthesize cyhalofop-butyl-hydrolyzing carboxylesterase through activating MAPKKKs, MAPKKs, MAPKs genes in MAPK signal transduction pathway. The induction process took one day for R. palustris. However, lack of organics in original wastewater did not maintain R. palustris growth for over one day. The supplementation of SPW provided sufficient carbon source. This new method resulted in the mixed wastewater treatment and improvement of biochemicals simultaneously, as well as the realization of reutilization of R. palustris. High-order non-linear mathematical model of the relationship between Rchb, Xc, and Xt was established.
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Affiliation(s)
- Pan Wu
- School of Environment and Resources, Dalian Minzu University, Dalian 116600, China; School of Resources and Environment, Northeast Agricultural University, ChinSchool of Environment and Resources, Harbin 150030, China
| | - Zhaobo Chen
- School of Environment and Resources, Dalian Minzu University, Dalian 116600, China; School of Resources and Environment, Northeast Agricultural University, ChinSchool of Environment and Resources, Harbin 150030, China
| | - Ying Zhang
- School of Environment and Resources, Dalian Minzu University, Dalian 116600, China; School of Resources and Environment, Northeast Agricultural University, ChinSchool of Environment and Resources, Harbin 150030, China.
| | - Yanling Wang
- Department of Anesthesiology, the Third Affiliated Hospital of SunYat-Sen University, Guangzhou 510630, China
| | - Feifei Zhu
- Forest and Soil Ecology, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110164, China
| | - Bo Cao
- School of Environment and Resources, Dalian Minzu University, Dalian 116600, China
| | - Yuan Wu
- School of Environment and Resources, Dalian Minzu University, Dalian 116600, China; School of Resources and Environment, Northeast Agricultural University, ChinSchool of Environment and Resources, Harbin 150030, China
| | - Ning Li
- School of Environment and Resources, Dalian Minzu University, Dalian 116600, China; School of Resources and Environment, Northeast Agricultural University, ChinSchool of Environment and Resources, Harbin 150030, China
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12
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Wu P, Zhang Y, Chen Z, Wang Y, Zhu F, Cao B, Wu Y, Li N. The organophosphorus pesticides in soil was degradated by Rhodobacter sphaeroides after wastewater treatment. Biochem Eng J 2019. [DOI: 10.1016/j.bej.2018.07.019] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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13
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Peng X, Wang Y, Tang LJ, Li XX, Xiao YW, Zhang ZB, Yan RM, Yang HL, Chang J, Zhu B, Zhu D. Yeasts from Nanfeng mandarin plants: occurrence, diversity and capability to produce indole-3-acetic acid. BIOTECHNOL BIOTEC EQ 2018. [DOI: 10.1080/13102818.2018.1487337] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
Affiliation(s)
- Xuan Peng
- Key Laboratory of Protection and Utilization of Subtropical Plant Resources of Jiangxi Province, Jiangxi Normal University, Nanchang, PR China
| | - Ya Wang
- Key Lab of Bioprocess Engineering of Jiangxi Province, College of Life Sciences, Jiangxi Science and Technology Normal University, Nanchang, PR China
| | - Li Juan Tang
- Key Laboratory of Protection and Utilization of Subtropical Plant Resources of Jiangxi Province, Jiangxi Normal University, Nanchang, PR China
| | - Xi Xi Li
- Science and Technology College, Jiangxi University of Traditional Chinese Medicine, Nanchang, PR China
| | - Yi Wen Xiao
- Key Lab of Bioprocess Engineering of Jiangxi Province, College of Life Sciences, Jiangxi Science and Technology Normal University, Nanchang, PR China
| | - Zhi Bin Zhang
- Key Laboratory of Protection and Utilization of Subtropical Plant Resources of Jiangxi Province, Jiangxi Normal University, Nanchang, PR China
| | - Ri Ming Yan
- Key Laboratory of Protection and Utilization of Subtropical Plant Resources of Jiangxi Province, Jiangxi Normal University, Nanchang, PR China
| | - Hui Lin Yang
- Key Laboratory of Protection and Utilization of Subtropical Plant Resources of Jiangxi Province, Jiangxi Normal University, Nanchang, PR China
| | - Jun Chang
- Key Lab of Bioprocess Engineering of Jiangxi Province, College of Life Sciences, Jiangxi Science and Technology Normal University, Nanchang, PR China
| | - Bo Zhu
- Processing Engineering Technology Research Center of Nanfeng Mandarin of Jiangxi Province, BO Jun Industrial, Nanchang, PR China
| | - Du Zhu
- Key Laboratory of Protection and Utilization of Subtropical Plant Resources of Jiangxi Province, Jiangxi Normal University, Nanchang, PR China
- Key Lab of Bioprocess Engineering of Jiangxi Province, College of Life Sciences, Jiangxi Science and Technology Normal University, Nanchang, PR China
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Senthil Kumar C, Jacob T, Devasahayam S, Thomas S, Geethu C. Multifarious plant growth promotion by an entomopathogenic fungus Lecanicillium psalliotae. Microbiol Res 2018; 207:153-160. [DOI: 10.1016/j.micres.2017.11.017] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2017] [Revised: 10/20/2017] [Accepted: 11/28/2017] [Indexed: 10/18/2022]
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15
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Su P, Tan X, Li C, Zhang D, Cheng J, Zhang S, Zhou X, Yan Q, Peng J, Zhang Z, Liu Y, Lu X. Photosynthetic bacterium Rhodopseudomonas palustris GJ-22 induces systemic resistance against viruses. Microb Biotechnol 2017; 10:612-624. [PMID: 28296178 PMCID: PMC5404195 DOI: 10.1111/1751-7915.12704] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2016] [Revised: 02/05/2017] [Accepted: 02/20/2017] [Indexed: 01/09/2023] Open
Abstract
Photosynthetic bacteria (PSB) have been extensively used in agriculture to promote plant growth and to improve crop quality. Their potential application in plant disease management, however, is largely overlooked. In this study, the PSB strain Rhodopseudomonas palustris GJ-22 was investigated for its ability to induce resistance against a plant virus while promoting plant growth. In the field, a foliar spray of GJ-22 suspension protected tobacco plants against tobacco mosaic virus (TMV). Under axenic conditions, GJ-22 colonized the plant phyllosphere and induced resistance against TMV. Additionally, GJ-22 produced two phytohormones, indole-3-acetic acid and 5-aminolevulinic acid, which promote growth and germination in tobacco. Furthermore, GJ-22-inoculated plants elevated their immune response under subsequent TMV infection. This research may give rise to a novel biological agent with a dual function in disease management while promoting plant growth.
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Affiliation(s)
- Pin Su
- Hunan Academy of Agricultural SciencesHunan Plant Protection InstituteChangsha410125China
| | - Xinqiu Tan
- Hunan Academy of Agricultural SciencesHunan Plant Protection InstituteChangsha410125China
| | - Chenggang Li
- Hunan Academy of Agricultural SciencesHunan Plant Protection InstituteChangsha410125China
| | - Deyong Zhang
- Hunan Academy of Agricultural SciencesHunan Plant Protection InstituteChangsha410125China
| | - Ju'e Cheng
- Hunan Academy of Agricultural SciencesHunan Plant Protection InstituteChangsha410125China
| | - Songbai Zhang
- Hunan Academy of Agricultural SciencesHunan Plant Protection InstituteChangsha410125China
| | - Xuguo Zhou
- Department of EntomologyUniversity of KentuckyLexingtonKY40546USA
| | - Qingpin Yan
- Hunan Academy of Agricultural SciencesHunan Plant Protection InstituteChangsha410125China
| | - Jing Peng
- Hunan Academy of Agricultural SciencesHunan Plant Protection InstituteChangsha410125China
| | - Zhuo Zhang
- Hunan Academy of Agricultural SciencesHunan Plant Protection InstituteChangsha410125China
| | - Yong Liu
- Hunan Academy of Agricultural SciencesHunan Plant Protection InstituteChangsha410125China
| | - Xiangyang Lu
- College of Bioscience and BiotechnologyHunan Agricultural UniversityChangsha410128China
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16
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Sun PF, Fang WT, Shin LY, Wei JY, Fu SF, Chou JY. Indole-3-acetic acid-producing yeasts in the phyllosphere of the carnivorous plant Drosera indica L. PLoS One 2014; 9:e114196. [PMID: 25464336 PMCID: PMC4252105 DOI: 10.1371/journal.pone.0114196] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2014] [Accepted: 11/03/2014] [Indexed: 11/18/2022] Open
Abstract
Yeasts are widely distributed in nature and exist in association with other microorganisms as normal inhabitants of soil, vegetation, and aqueous environments. In this study, 12 yeast strains were enriched and isolated from leaf samples of the carnivorous plant Drosera indica L., which is currently threatened because of restricted habitats and use in herbal industries. According to similarities in large subunit and small subunit ribosomal RNA gene sequences, we identified 2 yeast species in 2 genera of the phylum Ascomycota, and 5 yeast species in 5 genera of the phylum Basidiomycota. All of the isolated yeasts produced indole-3-acetic acid (IAA) when cultivated in YPD broth supplemented with 0.1% L-tryptophan. Growth conditions, such as the pH and temperature of the medium, influenced yeast IAA production. Our results also suggested the existence of a tryptophan-independent IAA biosynthetic pathway. We evaluated the effects of various concentrations of exogenous IAA on yeast growth and observed that IAA produced by wild yeasts modifies auxin-inducible gene expression in Arabidopsis. Our data suggest that yeasts can promote plant growth and support ongoing prospecting of yeast strains for inclusion into biofertilizer for sustainable agriculture.
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Affiliation(s)
- Pei-Feng Sun
- Department of Biology, National Changhua University of Education, Changhua 500, Taiwan, R.O.C
| | - Wei-Ta Fang
- Graduate Institute of Environmental Education, National Taiwan Normal University, Taipei 116, Taiwan, R.O.C
| | - Li-Ying Shin
- Department of Biology, National Changhua University of Education, Changhua 500, Taiwan, R.O.C
| | - Jyuan-Yu Wei
- Department of Biology, National Changhua University of Education, Changhua 500, Taiwan, R.O.C
| | - Shih-Feng Fu
- Department of Biology, National Changhua University of Education, Changhua 500, Taiwan, R.O.C
| | - Jui-Yu Chou
- Department of Biology, National Changhua University of Education, Changhua 500, Taiwan, R.O.C
- * E-mail:
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17
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Wong WT, Tseng CH, Hsu SH, Lur HS, Mo CW, Huang CN, Hsu SC, Lee KT, Liu CT. Promoting effects of a single Rhodopseudomonas palustris inoculant on plant growth by Brassica rapa chinensis under low fertilizer input. Microbes Environ 2014; 29:303-13. [PMID: 25130882 PMCID: PMC4159042 DOI: 10.1264/jsme2.me14056] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Several Rhodopseudomonas palustris strains have been isolated from rice paddy fields in Taiwan by combining the Winogradsky column method and molecular marker detection. These isolates were initially screened by employing seed germination and seedling vigor assays to evaluate their potential as inoculants. To fulfill the demand in the present farming system for reducing the application of chemical fertilizers, we assessed the plant growth-promoting effects of the R. palustris YSC3, YSC4, and PS3 inoculants on Brassica rapa chinensis (Chinese cabbage) cultivated under a half quantity of fertilizer. The results obtained showed that supplementation with approximately 4.0×10(6) CFU g(-1) soil of the PS3 inoculant at half the amount of fertilizer consistently produced the same plant growth potential as 100% fertility, and also increased the nitrogen use efficiency of the applied fertilizer nutrients. Furthermore, we noted that the plant growth-promotion rate elicited by PS3 was markedly higher with old seeds than with new seeds, suggesting it has the potential to boost the development of seedlings that were germinated from carry-over seeds of poor quality. These beneficial traits suggest that the PS3 isolate may serve as a potential PGPR inoculant for integrated nutrient management in agriculture.
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Affiliation(s)
- Wai-Tak Wong
- Department of Agronomy, National Taiwan University
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18
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Nutaratat P, Srisuk N, Arunrattiyakorn P, Limtong S. Plant growth-promoting traits of epiphytic and endophytic yeasts isolated from rice and sugar cane leaves in Thailand. Fungal Biol 2014; 118:683-94. [PMID: 25110131 DOI: 10.1016/j.funbio.2014.04.010] [Citation(s) in RCA: 63] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2014] [Revised: 04/21/2014] [Accepted: 04/26/2014] [Indexed: 11/16/2022]
Abstract
A total of 1035 yeast isolates, obtained from rice and sugar cane leaves, were screened primarily for indole-3-acetic acid (IAA) production. Thirteen isolates were selected, due to their IAA production ranging from 1.2 to 29.3 mg g(-)(1) DCW. These isolates were investigated for their capabilities of calcium phosphate and ZnO(3) solubilisation, and also for production of NH(3), polyamine, and siderophore. Their 1-aminocyclopropane-1-carboxylate (ACC) deaminase, catalase and fungal cell wall-degrading enzyme activities were assessed. Their antagonism against rice fungal pathogens was also evaluated. Strain identification, based on molecular taxonomy, of the thirteen yeast isolates revealed that four yeast species - i.e. Hannaella sinensis (DMKU-RP45), Cryptococcus flavus (DMKU-RE12, DMKU-RE19, DMKU-RE67, and DMKU-RP128), Rhodosporidium paludigenum (DMKU-RP301) and Torulaspora globosa (DMKU-RP31) - were capable of high IAA production. Catalase activity was detected in all yeast strains tested. The yeast R. paludigenum DMKU-RP301 was the best IAA producer, yielding 29.3 mg g(-)(1) DCW, and showed the ability to produce NH3 and siderophore. Different levels of IAA production (7.2-9.7 mg g(-)(1) DCW) were found in four strains of C. flavus DMKU-RE12, DMKU-RE19, and DMKU-RE67, which are rice leaf endophytes, and strain DMKU-RP128, which is a rice leaf epiphyte. NH(3) production and carboxymethyl cellulase (CMCase) activity was also detected in these four strains. Antagonism to fungal plant pathogens and production of antifungal volatile compounds were exhibited in T. globosa DMKU-RP31, as well as a moderate level of IAA production (4.9 mg g(-)(1) DCW). The overall results indicated that T. globosa DMKU-RP31 might be used in two ways: enhancing plant growth and acting as a biocontrol agent. In addition, four C. flavus were also found to be strains of interest for optimal IAA production.
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Affiliation(s)
- Pumin Nutaratat
- Department of Microbiology, Faculty of Science, Kasetsart University, Chatuchak, Bangkok 10900, Thailand
| | - Nantana Srisuk
- Department of Microbiology, Faculty of Science, Kasetsart University, Chatuchak, Bangkok 10900, Thailand; Center for Advanced Studies in Tropical Natural Resources, NRU-KU, Kasetsart University, Chatuchak, Bangkok 10900, Thailand.
| | - Panarat Arunrattiyakorn
- Department of Chemistry, Faculty of Science, Srinakharinwirot University, Bangkok 10110, Thailand
| | - Savitree Limtong
- Department of Microbiology, Faculty of Science, Kasetsart University, Chatuchak, Bangkok 10900, Thailand; Center for Advanced Studies in Tropical Natural Resources, NRU-KU, Kasetsart University, Chatuchak, Bangkok 10900, Thailand
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McInnis CE, Blackwell HE. Non-native N-aroyl L-homoserine lactones are potent modulators of the quorum sensing receptor RpaR in Rhodopseudomonas palustris. Chembiochem 2013; 15:87-93. [PMID: 24281952 DOI: 10.1002/cbic.201300570] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2013] [Indexed: 12/14/2022]
Abstract
Quorum sensing (QS) is a process by which bacteria use low-molecular-weight signaling molecules (or autoinducers) to assess their local population densities and alter gene expression levels at high cell numbers. Many Gram-negative bacteria use N-acyl L-homoserine lactones (AHLs) with aliphatic acyl groups as signaling molecules for QS. However, bacteria that utilize AHLs with aroyl acyl groups have been recently discovered; they include the metabolically versatile soil bacterium Rhodopseudomonas palustris, which uses p-coumaroyl HL (p-cAHL) as its QS signal. This autoinducer is especially unusual because its acyl group is believed to originate from a monolignol (i.e., p-coumarate) produced exogenously by plants in the R. palustris environment, rather than through the endogenous fatty acid biosynthesis pathway like other native AHLs. As such, p-cAHL could signal not only bacterial density, but also the availability of an exogenous plant-derived substrate and might even constitute an interkingdom signal. Like other Gram-negative bacteria, QS in R. palustris is controlled by the p-cAHL signal binding its cognate LuxR-type receptor, RpaR. We sought to determine if non-native aroyl HLs (ArHLs) could potentially activate or inhibit RpaR in R. palustris, and thereby modulate QS in this bacterium. Herein, we report the testing of a set of synthetic ArHLs for RpaR agonism and antagonism by using a R. palustris reporter strain. Several potent non-native RpaR agonists and antagonists were identified. Additionally, the screening data revealed that lower concentrations of ArHL are required to strongly agonize RpaR than to antagonize it. Structure-activity relationship analyses of the active ArHLs indicated that potent RpaR agonists tend to have sterically small substituents on their aryl groups, most notably in the ortho position. In turn, the most potent RpaR antagonists were based on either the phenylpropionyl HL (PPHL) or the phenoxyacetyl HL (POHL) scaffold, and many contained an electron-withdrawing group at either the meta or para positions of the aryl ring. To our knowledge, the compounds reported herein represent the first abiotic chemical modulators of RpaR, and more generally, the first abiotic ligands capable of intercepting QS in bacteria that utilize native ArHL signals. In view of the origins of the p-cAHL signal in R. palustris, the largely unknown role of QS in this bacterium, and R. palustris' unique environmental lifestyles, we anticipate that these compounds could be valuable as chemical probes to study QS in R. palustris in a range of fundamental and applied contexts.
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Affiliation(s)
- Christine E McInnis
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Ave., Madison, WI 53706 (USA); Current address: Dow Microbial Control, The Dow Chemical Company, 727 Norristown Rd., P. O. Box 904, Spring House, PA 19477 (USA)
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20
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Llorens I, Untereiner G, Jaillard D, Gouget B, Chapon V, Carriere M. Uranium interaction with two multi-resistant environmental bacteria: Cupriavidus metallidurans CH34 and Rhodopseudomonas palustris. PLoS One 2012; 7:e51783. [PMID: 23251623 PMCID: PMC3520905 DOI: 10.1371/journal.pone.0051783] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2012] [Accepted: 11/06/2012] [Indexed: 11/28/2022] Open
Abstract
Depending on speciation, U environmental contamination may be spread through the environment or inversely restrained to a limited area. Induction of U precipitation via biogenic or non-biogenic processes would reduce the dissemination of U contamination. To this aim U oxidation/reduction processes triggered by bacteria are presently intensively studied. Using X-ray absorption analysis, we describe in the present article the ability of Cupriavidus metallidurans CH34 and Rhodopseudomonas palustris, highly resistant to a variety of metals and metalloids or to organic pollutants, to withstand high concentrations of U and to immobilize it either through biosorption or through reduction to non-uraninite U(IV)-phosphate or U(IV)-carboxylate compounds. These bacterial strains are thus good candidates for U bioremediation strategies, particularly in the context of multi-pollutant or mixed-waste contaminations.
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Affiliation(s)
- Isabelle Llorens
- ESRF-CRG-FAME, Polygone Scientifique Louis Néel, Grenoble, France
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21
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Hu CW, Lin MH, Huang HC, Ku WC, Yi TH, Tsai CF, Chen YJ, Sugiyama N, Ishihama Y, Juan HF, Wu SH. Phosphoproteomic analysis of Rhodopseudomonas palustris reveals the role of pyruvate phosphate dikinase phosphorylation in lipid production. J Proteome Res 2012; 11:5362-75. [PMID: 23030682 DOI: 10.1021/pr300582p] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Rhodopseudomonas palustris (R. palustris) is a purple nonsulfur anoxygenic phototrophic bacterium with metabolic versatility and is able to grow under photoheterotrophic and chemoheterotrophic states. It has uses in carbon management, carbon recycling, hydrogen generation, and lipid production; therefore, it has the potential for bioenergy production and biodegradation. This study is the first to identify the phosphoproteome of R. palustris including 100 phosphopeptides from 54 phosphoproteins and 74 phosphopeptides from 42 phosphoproteins in chemoheterotrophic and photoheterotrophic growth conditions, respectively. In the identified phosphoproteome, phosphorylation at the threonine residue, Thr487, of pyruvate phosphate dikinase (PPDK, RPA1051) was found to participate in the regulation of carbon metabolism. Here, we show that PPDK enzyme activity is higher in photoheterotrophic growth, with Thr487 phosphorylation as a possible mediator. Under the same photoheterotrophic conditions, R. palustris with overexpressed wild-type PPDK showed an enhanced accumulation of total lipids than those with mutant PPDK (T487V) form. This study reveals the role of the PPDK in the production of biodiesel material, lipid content, with threonyl-phosphorylation as one of the possible regulatory events during photoheterotrophic growth in R. palustris.
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Affiliation(s)
- Chia-Wei Hu
- Institute of Molecular and Cellular Biology, National Taiwan University, Taipei 106, Taiwan
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Limtong S, Koowadjanakul N. Yeasts from phylloplane and their capability to produce indole-3-acetic acid. World J Microbiol Biotechnol 2012; 28:3323-35. [PMID: 22886557 DOI: 10.1007/s11274-012-1144-9] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2012] [Accepted: 07/31/2012] [Indexed: 10/28/2022]
Abstract
Yeasts were isolated from the phylloplane of various plant species collected from seven provinces in Thailand. A total of 114 yeast strains and 10 strains of a yeast-like fungus were obtained by enrichment isolation from 91 out of 97 leaf samples (93.8 %). On the basis of the D1/D2 domain of the large subunit rRNA gene sequence similarity, 98 strains were identified to be of 36 yeast species in 18 genera belonging to Ascomycota viz. Candida, Clavispora, Cyberlindnera, Debaryomyces, Hanseniaspora, Hyphopichia, Kazachstania, Kluyveromyces, Kodamaea, Lachancea, Metschnikowia, Meyrozyma, Pichia, Starmerella, Torulaspora and Wickerhamomyces, and to Basidiomycota viz. Sporidiobolus and Trichosporon. Three strains were found to represent two novels Candida species which were previously described as C. sirachaensis and C. sakaeoensis. Ten strains of yeast-like fungus were identified as Aureobasidium pullulans of the phylum Ascomycota. Ascomycetous yeast species accounted altogether for 98.0 % of the 98 strains. The prevalent species was Candida tropicalis with a low frequency of isolation (14.3 %). Diversity of yeasts other than ballistoconidium-forming yeast in phylloplane in a tropical country in Asia has been reported for the first time. All strains obtained were accessed for the capability to produce IAA and result revealed that 39 strains in 20 species, one strain each of an undescribed and a novel species, and two unidentified strains showed the capability of producing IAA when cultivated in yeast extract peptone dextrose broth supplemented with 0.1 % L-tryptophan. All five strains of Candida maltosa produced relatively high concentrations of IAA.
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Affiliation(s)
- Savitree Limtong
- Department of Microbiology, Faculty of Science, Kasetsart University, Bangkok, 10900, Thailand.
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Prasuna ML, Mujahid M, Sasikala C, Ramana CV. L-Phenylalanine catabolism and L-phenyllactic acid production by a phototrophic bacterium, Rubrivivax benzoatilyticus JA2. Microbiol Res 2012; 167:526-31. [PMID: 22494897 DOI: 10.1016/j.micres.2012.03.001] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2011] [Revised: 03/06/2012] [Accepted: 03/11/2012] [Indexed: 11/30/2022]
Abstract
A phototrophic bacterium (Rubrivivax benzoatilyticus JA2) grows at the expense of L-phenylalanine as sole source of nitrogen but not as carbon source. Near stoichiometric yields of L-phenylpyruvic acid (0.4 mM) and L-phenyllactate (0.4 mM) were observed from L-phenylalanine (0.9 mM consumed). Aminotransfarase and dehydrogenase activities involved in the formation of L-phenylpyruvic acid and L-phenyllactate were demonstrated unequivocally in Rubrivivax benzoatilyticus JA2. Growth conditions and carbon sources had an influence on L-phenyllactate production. The process yielded a maximum of 0.92 mM L-phenyllactate from L-phenylalanine (1 mM) when fructose served as carbon source for R. benzoatilyticus JA2.
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Affiliation(s)
- M Lakshmi Prasuna
- Department of Plant Sciences, University of Hyderabad, Hyderabad 500046, India
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Lo SC, Shih SH, Chang JJ, Wang CY, Huang CC. Enhancement of photoheterotrophic biohydrogen production at elevated temperatures by the expression of a thermophilic clostridial hydrogenase. Appl Microbiol Biotechnol 2012; 95:969-77. [PMID: 22460592 DOI: 10.1007/s00253-012-4017-0] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2011] [Revised: 03/05/2012] [Accepted: 03/06/2012] [Indexed: 10/28/2022]
Abstract
The working temperature of a photobioreactor under sunlight can be elevated above the optimal growth temperature of a microorganism. To improve the biohydrogen productivity of photosynthetic bacteria at higher temperatures, a [FeFe]-hydrogenase gene from the thermophile Clostridium thermocellum was expressed in the mesophile Rhodopseudomonas palustris CGA009 (strain CGA-CThydA) using a log-phase expression promoter P( pckA ) to drive the expression of heterogeneous hydrogenase gene. In contrast, a mesophilic Clostridium acetobutylicum [FeFe]-hydrogenase gene was also constructed and expressed in R. palustris (strain CGA-CAhydA). Both transgenic strains were tested for cell growth, in vivo hydrogen production rate, and in vitro hydrogenase activity at elevated temperatures. Although both CGA-CThydA and CGA-CAhydA strains demonstrated enhanced growth over the vector control at temperatures above 38 °C, CGA-CThydA produced more hydrogen than the other strains. The in vitro hydrogenase activity assay, measured at 40 °C, confirmed that the activity of the CGA-CThydA hydrogenase was higher than the CGA-CAhydA hydrogenase. These results showed that the expression of a thermophilic [FeFe]-hydrogenase in R. palustris increased the growth rate and biohydrogen production at elevated temperatures. This transgenic strategy can be applied to a broad range of purple photosynthetic bacteria used to produce biohydrogen under sunlight.
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Affiliation(s)
- Shou-Chen Lo
- Department of Life Sciences, National Chung Hsing University, 250 Kuo Kuang Road, Taichung, Taiwan, Republic of China
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25
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Dimethyl sulfoxide and ethanol elicit increased amyloid biogenesis and amyloid-integrated biofilm formation in Escherichia coli. Appl Environ Microbiol 2012; 78:3369-78. [PMID: 22389366 DOI: 10.1128/aem.07743-11] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Escherichia coli directs the assembly of functional amyloid fibers termed "curli" that mediate adhesion and biofilm formation. We discovered that E. coli exhibits a tunable and selective increase in curli protein expression and fiber assembly in response to moderate concentrations of dimethyl sulfoxide (DMSO) and ethanol. Furthermore, the molecular alterations resulted in dramatic functional phenotypes associated with community behavior, including (i) cellular agglutination in broth, (ii) altered colony morphology, and (iii) increased biofilm formation. Solid-state nuclear magnetic resonance (NMR) spectra of intact pellicles formed in the presence of [(13)C(2)]DMSO confirmed that DMSO was not being transformed and utilized directly for metabolism. Collectively, the chemically induced phenotypes emphasize the plasticity of E. coli's response to environmental stimuli to enhance amyloid production and amyloid-integrated biofilm formation. The data also support our developing model of the extracellular matrix as an organized assembly of polymeric components, including amyloid fibers, in which composition relates to bacterial physiology and community function.
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Inglesby AE, Beatty DA, Fisher AC. Rhodopseudomonas palustris purple bacteria fed Arthrospira maxima cyanobacteria: demonstration of application in microbial fuel cells. RSC Adv 2012. [DOI: 10.1039/c2ra20264f] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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27
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Revealing the functions of the transketolase enzyme isoforms in Rhodopseudomonas palustris using a systems biology approach. PLoS One 2011; 6:e28329. [PMID: 22174789 PMCID: PMC3234253 DOI: 10.1371/journal.pone.0028329] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2011] [Accepted: 11/05/2011] [Indexed: 01/08/2023] Open
Abstract
Background Rhodopseudomonas palustris (R. palustris) is a purple non-sulfur anoxygenic phototrophic bacterium that belongs to the class of proteobacteria. It is capable of absorbing atmospheric carbon dioxide and converting it to biomass via the process of photosynthesis and the Calvin–Benson–Bassham (CBB) cycle. Transketolase is a key enzyme involved in the CBB cycle. Here, we reveal the functions of transketolase isoforms I and II in R. palustris using a systems biology approach. Methodology/Principal Findings By measuring growth ability, we found that transketolase could enhance the autotrophic growth and biomass production of R. palustris. Microarray and real-time quantitative PCR revealed that transketolase isoforms I and II were involved in different carbon metabolic pathways. In addition, immunogold staining demonstrated that the two transketolase isoforms had different spatial localizations: transketolase I was primarily associated with the intracytoplasmic membrane (ICM) but transketolase II was mostly distributed in the cytoplasm. Comparative proteomic analysis and network construction of transketolase over-expression and negative control (NC) strains revealed that protein folding, transcriptional regulation, amino acid transport and CBB cycle-associated carbon metabolism were enriched in the transketolase I over-expressed strain. In contrast, ATP synthesis, carbohydrate transport, glycolysis-associated carbon metabolism and CBB cycle-associated carbon metabolism were enriched in the transketolase II over-expressed strain. Furthermore, ATP synthesis assays showed a significant increase in ATP synthesis in the transketolase II over-expressed strain. A PEPCK activity assay showed that PEPCK activity was higher in transketolase over-expressed strains than in the negative control strain. Conclusions/Significance Taken together, our results indicate that the two isoforms of transketolase in R. palustris could affect photoautotrophic growth through both common and divergent metabolic mechanisms.
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Mujahid M, Sasikala C, Ramana CV. Production of indole-3-acetic acid and related indole derivatives from L-tryptophan by Rubrivivax benzoatilyticus JA2. Appl Microbiol Biotechnol 2010; 89:1001-8. [DOI: 10.1007/s00253-010-2951-2] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2010] [Revised: 10/08/2010] [Accepted: 10/09/2010] [Indexed: 10/18/2022]
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L-Tryptophan catabolism by Rubrivivax benzoatilyticus JA2 occurs through indole 3-pyruvic acid pathway. Biodegradation 2010; 21:825-32. [PMID: 20217460 DOI: 10.1007/s10532-010-9347-y] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2009] [Accepted: 02/28/2010] [Indexed: 10/19/2022]
Abstract
Rubrivivax benzoatilyticus JA2 utilizes L: -tryptophan as the sole source of nitrogen for growth, and it has a doubling time of approximately 11 h (compared to 8 h with ammonium chloride). With cell free extracts in the presence of 2-oxoglutarate, indole-3-pyruvic acid, indole-3-acetaldehyde, indole-3-acetic acid, isatin, benzaldehyde, gallic acid and pyrogallol were identified using high performance liquid chromatography (HPLC) and liquid chromatography-mass spectroscopy (LC-MS) analysis. The conversion of L: -tryptophan into indole 3-pyruvic acid and glutamate by an enzyme aminotransferase was confirmed and the catabolism of indole-3-pyruvic acid via side chain oxidation followed by ring oxidation, gallic acid and pyrogallol were confirmed as metabolites. In addition, the proposed pathway sequential conversion of indole-3-pyruvic acid to the end product of pyrogallol was identified, including an enzymatic step that would convert isatin to benzaldehyde by an enzyme yet to be identified. At this stage of the study, the enzyme tryptophan aminotransferase in R. benzoatilyticus JA2 was demonstrated.
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Mujahid M, Sasikala C, Ramana CV. Aniline-induced tryptophan production and identification of indole derivatives from three purple bacteria. Curr Microbiol 2010; 61:285-90. [PMID: 20852980 DOI: 10.1007/s00284-010-9609-2] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2010] [Accepted: 02/04/2010] [Indexed: 11/28/2022]
Abstract
Growth on aniline by three purple non-sulfur bacteria (Rhodospirillum rubrum ATCC 11170, Rhodobacter sphaeroides DSM 158, and Rubrivivax benzoatiliticus JA2) as nitrogen, or carbon source could not be demonstrated. However in its presence, production of indole derivatives was observed with all the strains tested. At least 14 chromatographically (HPLC) distinct peaks were observed at the absorption maxima of 275-280 nm from aniline induced cultures. Five major indoles were identified based on HPLC and LC-MS/MS analysis. While tryptophan was the major common metabolite for all the three aniline induced cultures, production of indole-3-acetic acid was observed with Rvi. benzoatilyticus JA2 alone, while indole-3-aldehyde was identified from Rvi. benzoatilyticus JA2 and Rba. sphaeroides DSM 158. Indole-3-ethanol was identified only from Rsp. rubrum ATCC 1170 and anthranilic acid was identified from Rba. sphaeroides DSM 158.
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Affiliation(s)
- Md Mujahid
- Department of Plant Sciences, School of Life Sciences, University of Hyderabad, P.O. Central University, Hyderabad 500 046, India
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31
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Ranjith NK, Sasikala C, Ramana CV. Catabolism of L-phenylalanine and L-tyrosine by Rhodobacter sphaeroides OU5 occurs through 3,4-dihydroxyphenylalanine. Res Microbiol 2007; 158:506-11. [PMID: 17616348 DOI: 10.1016/j.resmic.2007.04.008] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2006] [Revised: 04/26/2007] [Accepted: 04/27/2007] [Indexed: 10/23/2022]
Abstract
Rhodobacter sphaeroides OU5 utilized l-phenylalanine as sole source of nitrogen for growth. The metabolites of l-phenylalanine catabolism, i.e. 4-hydroxy phenylalanine (l-tyrosine), 3,4-dihydroxyphenylalanine (DOPA), 3,4-dihydroxyphenyl-pyruvic acid (DOPP), 3,4-dihydroxyphenyllactic acid (DOPLA), 3,4-dihydroxyphenyl-acetic acid (DOPAc) and 3,4-dihydroxybenzoic acid (PC), were identified using liquid chromatography-mass spectroscopy (LC-MS). With 2-oxoglutarate as an amino acceptor, DOPA aminotransferase activity was observed with cell-free extracts and the product DOPP was confirmed through mass analysis. Reductive deamination of DOPA also occurred in the absence of 2-oxoglutarate, whose products were 3,4-dihydroxyphenylpropionic acid (DPPA) and ammonia. The enzyme DOPA-reductive deaminase (DOPARDA) was purified to its homogeneity and characterized. DOPARDA has an obligate requirement for NADH and is functional at low concentrations of the substrate (<150 microM). The molecular mass of the purified enzyme was approximately 274kD and the enzyme could be a heterotetramer of 110, 82, 43 and 39kD subunits as determined by SDS-PAGE.
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Affiliation(s)
- N K Ranjith
- Department of Plant Sciences, School of Life Sciences, University of Hyderabad, P.O. Central University, Hyderabad 500 046, India
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32
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Usha P, Sasikala C, Ramana CV. Light-dependent assimilation of trans-cinnamate by Rhodobacter sphaeroides OU5. Curr Microbiol 2007; 54:410-3. [PMID: 17503150 DOI: 10.1007/s00284-006-0440-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2006] [Accepted: 12/06/2006] [Indexed: 11/27/2022]
Abstract
We present a novel light-dependent metabolism of an aromatic compound (trans-cinnamate) that is assimilatory rather than dissimilatory. Light-dependent assimilation of trans-cinnamate was observed by both growing and resting cells of Rhodobacter sphaeroides OU5. Trans-cinnamate assimilation could be correlated with simultaneous formation of both phenylalanine and tyrosine at near-stoichiometric ratios. Trans-cinnamate assimilation was promoted by carbon source and electron donors, such as glucose, pyruvate, or alpha-ketoglutarate, whereas malate, succinate, fumarate, and acetate were inhibitory.
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Affiliation(s)
- P Usha
- Department of Plant Sciences, School of Life Sciences, University of Hyderabad, P.O. Central University, Hyderabad, 500 046, India
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33
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Patrusheva EV, Fedorov AS, Belera VV, Minkevich IG, Tsygankov AA. Synthesis of bacteriochlorophyll a by the purple nonsulfur bacterium Rhodobacter capsulatus. APPL BIOCHEM MICRO+ 2007. [DOI: 10.1134/s000368380702010x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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34
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Ramana CV, Sasikala C, Arunasri K, Anil Kumar P, Srinivas TNR, Shivaji S, Gupta P, Süling J, Imhoff JF. Rubrivivax benzoatilyticus sp. nov., an aromatic, hydrocarbon-degrading purple betaproteobacterium. Int J Syst Evol Microbiol 2006; 56:2157-2164. [PMID: 16957114 DOI: 10.1099/ijs.0.64209-0] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
A brown-coloured bacterium was isolated from photoheterotrophic (benzoate) enrichments of flooded paddy soil from Andhra Pradesh, India. On the basis of 16S rRNA gene sequence analysis, strain JA2(T) was shown to belong to the class Betaproteobacteria, related to Rubrivivax gelatinosus (99 % sequence similarity). Cells of strain JA2(T) are Gram-negative, motile rods with monopolar single flagella. The strain contained bacteriochlorophyll a and most probably the carotenoids spirilloxanthin and sphaeroidene, but did not have internal membrane structures. Intact cells had absorption maxima at 378, 488, 520, 590, 802 and 884 nm. No growth factors were required. Strain JA2(T) grew on benzoate, 2-aminobenzoate (anthranilate), 4-aminobenzoate, 4-hydroxybenzoate, phthalate, phenylalanine, trans-cinnamate, benzamide, salicylate, cyclohexanone, cyclohexanol and cyclohexane-2-carboxylate as carbon sources and/or electron donors. The DNA G+C content was 74.9 mol%. Based on DNA-DNA hybridization studies, 16S rRNA gene sequence analysis and morphological and physiological characteristics, strain JA2(T) is different from representatives of other photosynthetic species of the Betaproteobacteria and was recognised as representing a novel species, for which the name Rubrivivax benzoatilyticus sp. nov. is proposed. The type strain is JA2(T) (=ATCC BAA-35(T)=JCM 13220(T)=MTCC 7087(T)).
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Affiliation(s)
- Ch V Ramana
- Department of Plant Sciences, School of Life Sciences, University of Hyderabad, PO Central University, Hyderabad 500 046, India
| | - Ch Sasikala
- Environmental Microbial Biotechnology Laboratory, Center for Environment, Institute of Science and Technology, J.N.T. University, Kukatpally, Hyderabad 500 072, India
| | - K Arunasri
- Environmental Microbial Biotechnology Laboratory, Center for Environment, Institute of Science and Technology, J.N.T. University, Kukatpally, Hyderabad 500 072, India
| | - P Anil Kumar
- Environmental Microbial Biotechnology Laboratory, Center for Environment, Institute of Science and Technology, J.N.T. University, Kukatpally, Hyderabad 500 072, India
| | - T N R Srinivas
- Environmental Microbial Biotechnology Laboratory, Center for Environment, Institute of Science and Technology, J.N.T. University, Kukatpally, Hyderabad 500 072, India
| | - S Shivaji
- Center for Cellular and Molecular Biology, Uppal Road, Hyderabad 500 007, India
| | - P Gupta
- Center for Cellular and Molecular Biology, Uppal Road, Hyderabad 500 007, India
| | - J Süling
- Leibniz-Institut für Meereswissenschaften, IFM-GEOMAR, Marine Mikrobiologie, Düsternbrooker Weg 20, 24105 Kiel, Germany
| | - J F Imhoff
- Leibniz-Institut für Meereswissenschaften, IFM-GEOMAR, Marine Mikrobiologie, Düsternbrooker Weg 20, 24105 Kiel, Germany
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Shanker V, Rayabandla SM, Kumavath RN, Chintalapati S, Chintalapati R. Light-Dependent Transformation of Aniline to Indole Esters by the Purple Bacterium Rhodobacter sphaeroides OU5. Curr Microbiol 2006; 52:413-7. [PMID: 16732448 DOI: 10.1007/s00284-005-0057-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2005] [Accepted: 07/12/2005] [Indexed: 10/24/2022]
Abstract
In an attempt to understand the aromatic hydrocarbon metabolism by purple bacteria that do not grow at their expense, we earlier reported 2-aminobenzoate transformation by a purple non-sulfur bacterium, Rhodobacter sphaeroides OU5 (Sunayana et al., 2005, J Ind Microbiol Biotech 32:41-45), which is extended in the present study with aniline, a major environmental pollutant. Aniline did not support photo (light anaerobic) or chemo (dark aerobic) heterotrophic growth of Rhodobacter sphaeroides OU5 either as a sole source of carbon or nitrogen. However, light-dependent aniline transformation was observed in the culture supernatants and the products were identified as indole derivatives. The transformation was dependent on a tricarboxylate intermediate, fumarate. Five intermediates of the aniline biotransformation pathway were isolated and identified as indole esters having a mass of 443, 441, 279, 189, and 167 with unstoichiometric total indole yields of 0.16 mM: from 5 mM: of aniline consumed. The pathway proposed based on these intermediates suggest a novel xenobiotic detoxification process in bacteria.
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Affiliation(s)
- Vijay Shanker
- Department of Plant Sciences, School of Life Sciences, University of Hyderabad P.O. Central University, Hyderabad, 500 046, India
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Sunayana MR, Sasikala C, Ramana CV. Production of a novel indole ester from 2-aminobenzoate by Rhodobacter sphaeroides OU5. J Ind Microbiol Biotechnol 2005; 32:41-5. [PMID: 15726442 DOI: 10.1007/s10295-004-0193-y] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2004] [Accepted: 10/16/2004] [Indexed: 11/30/2022]
Abstract
Culture supernatants of Rhodobacter sphaeroides OU5 grown in the presence of 2-aminobenzoate gave an orange-red color-reaction with Salper's reagent, suggesting the presence of an indole derivative. This production was light-dependent and inducible only with 2-aminobenzoate. Replacement of 2-aminobenzoate with other 2-substituted benzoates did not result in the formation of indole. Fumarate appeared to be the conjugating molecule with 2-aminobenzoate, resulting in the formation of an indole derivative. The purified indole derivative was orange-brown in color, with a yields 0.34 mM from 1 mM 2-aminobenzoate. Infrared analysis suggested an indole ester and (1)H NMR analysis indicated an indole carboxylate, esterified with a terpenoid alcohol. The indole ester has a mass of 441 with the molecular formula C(27)H(39)NO(4). The IUPAC name of the compound is (3 E,5 E)-14-hydroxy-3,7,11-trimethyl-3,5-tetradecadienyl 2-(hydroxymethyl)-1 H-indole-3-carboxylate; and the common name given to this compound is sphestrin.
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Affiliation(s)
- M R Sunayana
- Department of Plant Sciences, School of Life Sciences, University of Hyderabad, P.O. Central University, Gachibowli, Hyderabad 500046, India
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Larimer FW, Chain P, Hauser L, Lamerdin J, Malfatti S, Do L, Land ML, Pelletier DA, Beatty JT, Lang AS, Tabita FR, Gibson JL, Hanson TE, Bobst C, Torres JLTY, Peres C, Harrison FH, Gibson J, Harwood CS. Complete genome sequence of the metabolically versatile photosynthetic bacterium Rhodopseudomonas palustris. Nat Biotechnol 2003; 22:55-61. [PMID: 14704707 DOI: 10.1038/nbt923] [Citation(s) in RCA: 480] [Impact Index Per Article: 22.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2003] [Accepted: 11/03/2003] [Indexed: 01/26/2023]
Abstract
Rhodopseudomonas palustris is among the most metabolically versatile bacteria known. It uses light, inorganic compounds, or organic compounds, for energy. It acquires carbon from many types of green plant-derived compounds or by carbon dioxide fixation, and it fixes nitrogen. Here we describe the genome sequence of R. palustris, which consists of a 5,459,213-base-pair (bp) circular chromosome with 4,836 predicted genes and a plasmid of 8,427 bp. The sequence reveals genes that confer a remarkably large number of options within a given type of metabolism, including three nitrogenases, five benzene ring cleavage pathways and four light harvesting 2 systems. R. palustris encodes 63 signal transduction histidine kinases and 79 response regulator receiver domains. Almost 15% of the genome is devoted to transport. This genome sequence is a starting point to use R. palustris as a model to explore how organisms integrate metabolic modules in response to environmental perturbations.
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Affiliation(s)
- Frank W Larimer
- Genome Analysis and Systems Modeling, Oak Ridge National Laboratory, One Bethel Valley Rd., Oak Ridge, Tennessee 37831, USA
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38
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Bent SJ, Gucker CL, Oda Y, Forney LJ. Spatial distribution of Rhodopseudomonas palustris ecotypes on a local scale. Appl Environ Microbiol 2003; 69:5192-7. [PMID: 12957901 PMCID: PMC194914 DOI: 10.1128/aem.69.9.5192-5197.2003] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The number, spatial distribution, and significance of genetically distinguishable ecotypes of prokaryotes in the environment are poorly understood. Oda et al. (Y. Oda, B. Star, L. A. Huisman, J. C. Gottschal, and L. J. Forney, Appl. Environ. Microbiol. 69:xxx-xxx, 2003) have shown that Rhodopseudomonas palustris ecotypes were lognormally distributed along a 10-m transect and that multiple strains of the species could coexist in 0.5-g sediment samples. To extend these observations, we investigated the clonal diversity of R. palustris in 0.5-g samples taken from the corners and center of a 1-m square. A total of 35 or 36 clones were recovered by direct plating from each sample and were characterized by BOX A1R repetitive element-PCR genomic DNA fingerprinting. Isolates with fingerprint images that were >/=80% similar to each other were defined as the same genotype. Among the 178 isolates studied, 32 genotypes were identified, and each genotype contained between 1 and 40 isolates. These clusters were consistent with minor variations found in 16S rRNA gene sequences. The Shannon indices of the genotypic diversity within each location ranged from 1.08 (5 genotypes) to 2.18 (13 genotypes). Comparison of the rank abundance of genotypes found in pairs of locations showed that strains from three locations were similar to each other, with Morisita-Horn similarity coefficients ranging from 0.59 to 0.71. All comparisons involving the remaining two locations resulted in coefficients between 0 and 0.12. From these results we inferred that the patterns of ecotype diversity at the sampling site are patchy at a 1-m scale and postulated that factors such as mixing, competitive interactions, and microhabitat variability are likely to be responsible for the maintenance of the similarities between some locations and the differences between others.
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Affiliation(s)
- S J Bent
- University of Idaho, Moscow, Idaho, USA
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Oda Y, Wanders W, Huisman LA, Meijer WG, Gottschal JC, Forney LJ. Genotypic and phenotypic diversity within species of purple nonsulfur bacteria isolated from aquatic sediments. Appl Environ Microbiol 2002; 68:3467-77. [PMID: 12089030 PMCID: PMC126784 DOI: 10.1128/aem.68.7.3467-3477.2002] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
To assess the extent of genotypic and phenotypic diversity within species of purple nonsulfur bacteria found in aquatic sediments, a total of 128 strains were directly isolated from agar plates that had been inoculated with sediment samples from Haren and De Biesbosch in The Netherlands. All isolates were initially characterized by BOX-PCR genomic DNA fingerprinting, and 60 distinct genotypes were identified. Analyses of 16S rRNA gene sequences of representatives of each genotype showed that five and eight different phylotypes of purple nonsulfur bacteria were obtained from the Haren and De Biesbosch sites, respectively. At the Haren site, 80.5% of the clones were Rhodopseudomonas palustris, whereas Rhodoferax fermentans and Rhodopseudomonas palustris were numerically dominant at the De Biesbosch site and constituted 45.9 and 34.4% of the isolates obtained, respectively. BOX-PCR genomic fingerprints showed that there was a high level of genotypic diversity within each of these species. The genomic fingerprints of Rhodopseudomonas palustris isolates were significantly different for isolates from the two sampling sites, suggesting that certain strains may be endemic to each sampling site. Not all Rhodopseudomonas palustris isolates could degrade benzoate, a feature that has previously been thought to be characteristic of the species. There were differences in the BOX-PCR genomic fingerprints and restriction fragment length polymorphisms of benzoate-coenzyme A ligase genes and form I and form II ribulose 1,5-bisphosphate carboxylase/oxygenase (RubisCO) genes between benzoate-degrading and non-benzoate-degrading genotypes. The ability to distinguish these two Rhodopseudomonas palustris groups based on multiple genetic differences may reflect an incipient speciation event resulting from adaptive evolution to local environmental conditions.
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Affiliation(s)
- Yasuhiro Oda
- Laboratory of Microbial Ecology, Center for Ecological and Evolutionary Studies, University of Groningen, 9751 NN Haren, The Netherlands
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Oda Y, Vries YP, Forney LJ, Gottschal JC. Acquisition of the ability for Rhodopseudomonas palustris to degrade chlorinated benzoic acids as the sole carbon source. FEMS Microbiol Ecol 2001. [DOI: 10.1111/j.1574-6941.2001.tb00891.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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