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Ulrich Disko - One of the best experts on this subject based on the ideXlab platform.
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interspecies cooperations of Abutilon theophrasti with root colonizing microorganisms disarm boa oh allelochemicals
Plant Signaling & Behavior, 2017Co-Authors: Margot Schulz, Dieter Sicker, Oliver Schackow, Lothar Hennig, Diana Hofmann, Ulrich Disko, Andrey Yurkov, Meike Siebers, Cristina Ganimede, Letizia MondaniAbstract:ABSTRACTA facultative, microbial micro-community colonizing roots of Abutilon theophrasti Medik. supports the plant in detoxifying hydroxylated benzoxazolinones. The root micro-community is composed of several fungi and bacteria with Actinomucor elegans as a dominant species. The yeast Papiliotrema baii and the bacterium Pantoea ananatis are actively involved in the detoxification of hydroxylated benzoxazolinones by generating H2O2. At the root surface, laccases, peroxidases and polyphenol oxidases cooperate for initiating polymerization reactions, whereby enzyme combinations seem to differ depending on the hydroxylation position of BOA-OHs. A glucosyltransferase, able to glucosylate the natural benzoxazolinone detoxification intermediates BOA-5- and BOA-6-OH, is thought to reduce oxidative overshoots by damping BOA-OH induced H2O2 generation. Due to this detoxification network, growth of Abutilon theophrasti seedlings is not suppressed by BOA-OHs. Polymer coats have no negative influence. Alternatively, ...
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6-Hydroxy-5-nitrobenzo[d]oxazol-2(3H)-one—A degradable derivative of natural 6-Hydroxybenzoxazolin-2(3H)-one produced by Pantoea ananatis
Taylor & Francis Group, 2017Co-Authors: Margot Schulz, Dieter Sicker, Oliver Schackow, Lothar Hennig, Diana Hofmann, Ulrich Disko, Marina Ventura, Kateryna BasyukAbstract:Pantoea ananatis is a bacterium associated with other microorganisms on Abutilon theophrasti Medik. roots. It converts 6-hydroxybenzoxazolin-2(3H)-one (BOA-6-OH), a hydroxylated derivative of the allelochemical benzoxazolin-2(3H)-one, into 6-hydroxy-5-nitrobenzo[d]oxazol-2(3H)-one. The compound was identified by NMR and mass spectrometric methods. In vitro synthesis succeeded with Pantoea protein, with isolated proteins from the Abutilon root surface or with horseradish peroxidase in the presence of nitrite and H2O2. Nitro-BOA-6-OH is completely degraded further by Pantoea ananatis and Abutilon root surface proteins. Under laboratory conditions, 6-hydroxy-5-nitrobenzo[d]oxazol-2(3H)-one inhibits Lepidium sativum seedling growth whereas Abutilon theophrasti is much less affected. Although biodegradable, an agricultural use of 6-hydroxy-5-nitrobenzo[d]oxazol-2(3H)-one is undesirable because of the high toxicity of nitro aromatic compounds to mammals
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Abutilon theophrasti s defense against the allelochemical benzoxazolin 2 3h one support by actinomucor elegans
Journal of Chemical Ecology, 2014Co-Authors: Margot Schulz, Diana Hofmann, Sevda Haghi Kia, Emmanuel Ayah, Alexander Schouten, Carmen Mullenborn, Christian Paetz, Bernd Schneider, Ulrich DiskoAbstract:Abutilon theophrasti Medik., previously found to be rather insensitive to benzoxazinoid containing rye mulch and the allelochemical benzoxazolin-2(3H)-one (BOA), can be associated with the zygomycete Actinomucor elegans, whereby the fungus colonizes the root relatively superficially and mainly in the maturation zone. The fungus mitigates necrosis of the cotyledons when seedlings are incubated with 2 mM BOA, in contrast to those that lack the fungus. In liquid cultures of the fungus, tryptophan was identified. The accumulation of tryptophan is increased in presence of BOA. This amino acid seems to be important in protecting Abutilon against BOA and its derivatives since it suppressed the accumulation of BOA derived, highly toxic 2-aminophen-oxazin-3-one (APO) in the medium and on the root surface during BOA incubations of Abutilon seedlings. Although A. elegans is insensitive to BOA and APO, the fungus is not able to protect the plant against harmful effects of APO, when seedlings are treated with the compound. Abutilon can detoxify BOA via BOA-6-OH glucosylation probably by a cell wall associated glucosyltransferase, but only low amounts of the product accumulate. Low tryptophan concentrations can contribute to a degradation of the toxic intermediate BOA-6-OH by Fenton reactions, whereby the amino acid is oxidized. One of the oxidation products was identified as 4(1H)-quinolinone, which is the core substructure of the quorum sensing molecule 2-heptyl-3-hydroxy-4-quinolone. The mutualistic association of Abutilon theophrasti with Actinomucor elegans is considered as opportunistic and facultative. Such plant-fungus associations depend rather likely on environmental conditions, such as the mode of fertilization.
Margot Schulz - One of the best experts on this subject based on the ideXlab platform.
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interspecies cooperations of Abutilon theophrasti with root colonizing microorganisms disarm boa oh allelochemicals
Plant Signaling & Behavior, 2017Co-Authors: Margot Schulz, Dieter Sicker, Oliver Schackow, Lothar Hennig, Diana Hofmann, Ulrich Disko, Andrey Yurkov, Meike Siebers, Cristina Ganimede, Letizia MondaniAbstract:ABSTRACTA facultative, microbial micro-community colonizing roots of Abutilon theophrasti Medik. supports the plant in detoxifying hydroxylated benzoxazolinones. The root micro-community is composed of several fungi and bacteria with Actinomucor elegans as a dominant species. The yeast Papiliotrema baii and the bacterium Pantoea ananatis are actively involved in the detoxification of hydroxylated benzoxazolinones by generating H2O2. At the root surface, laccases, peroxidases and polyphenol oxidases cooperate for initiating polymerization reactions, whereby enzyme combinations seem to differ depending on the hydroxylation position of BOA-OHs. A glucosyltransferase, able to glucosylate the natural benzoxazolinone detoxification intermediates BOA-5- and BOA-6-OH, is thought to reduce oxidative overshoots by damping BOA-OH induced H2O2 generation. Due to this detoxification network, growth of Abutilon theophrasti seedlings is not suppressed by BOA-OHs. Polymer coats have no negative influence. Alternatively, ...
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6-Hydroxy-5-nitrobenzo[d]oxazol-2(3H)-one—A degradable derivative of natural 6-Hydroxybenzoxazolin-2(3H)-one produced by Pantoea ananatis
Taylor & Francis Group, 2017Co-Authors: Margot Schulz, Dieter Sicker, Oliver Schackow, Lothar Hennig, Diana Hofmann, Ulrich Disko, Marina Ventura, Kateryna BasyukAbstract:Pantoea ananatis is a bacterium associated with other microorganisms on Abutilon theophrasti Medik. roots. It converts 6-hydroxybenzoxazolin-2(3H)-one (BOA-6-OH), a hydroxylated derivative of the allelochemical benzoxazolin-2(3H)-one, into 6-hydroxy-5-nitrobenzo[d]oxazol-2(3H)-one. The compound was identified by NMR and mass spectrometric methods. In vitro synthesis succeeded with Pantoea protein, with isolated proteins from the Abutilon root surface or with horseradish peroxidase in the presence of nitrite and H2O2. Nitro-BOA-6-OH is completely degraded further by Pantoea ananatis and Abutilon root surface proteins. Under laboratory conditions, 6-hydroxy-5-nitrobenzo[d]oxazol-2(3H)-one inhibits Lepidium sativum seedling growth whereas Abutilon theophrasti is much less affected. Although biodegradable, an agricultural use of 6-hydroxy-5-nitrobenzo[d]oxazol-2(3H)-one is undesirable because of the high toxicity of nitro aromatic compounds to mammals
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Abutilon theophrasti s defense against the allelochemical benzoxazolin 2 3h one support by actinomucor elegans
Journal of Chemical Ecology, 2014Co-Authors: Margot Schulz, Diana Hofmann, Sevda Haghi Kia, Emmanuel Ayah, Alexander Schouten, Carmen Mullenborn, Christian Paetz, Bernd Schneider, Ulrich DiskoAbstract:Abutilon theophrasti Medik., previously found to be rather insensitive to benzoxazinoid containing rye mulch and the allelochemical benzoxazolin-2(3H)-one (BOA), can be associated with the zygomycete Actinomucor elegans, whereby the fungus colonizes the root relatively superficially and mainly in the maturation zone. The fungus mitigates necrosis of the cotyledons when seedlings are incubated with 2 mM BOA, in contrast to those that lack the fungus. In liquid cultures of the fungus, tryptophan was identified. The accumulation of tryptophan is increased in presence of BOA. This amino acid seems to be important in protecting Abutilon against BOA and its derivatives since it suppressed the accumulation of BOA derived, highly toxic 2-aminophen-oxazin-3-one (APO) in the medium and on the root surface during BOA incubations of Abutilon seedlings. Although A. elegans is insensitive to BOA and APO, the fungus is not able to protect the plant against harmful effects of APO, when seedlings are treated with the compound. Abutilon can detoxify BOA via BOA-6-OH glucosylation probably by a cell wall associated glucosyltransferase, but only low amounts of the product accumulate. Low tryptophan concentrations can contribute to a degradation of the toxic intermediate BOA-6-OH by Fenton reactions, whereby the amino acid is oxidized. One of the oxidation products was identified as 4(1H)-quinolinone, which is the core substructure of the quorum sensing molecule 2-heptyl-3-hydroxy-4-quinolone. The mutualistic association of Abutilon theophrasti with Actinomucor elegans is considered as opportunistic and facultative. Such plant-fungus associations depend rather likely on environmental conditions, such as the mode of fertilization.
Muhammad Jamshaid - One of the best experts on this subject based on the ideXlab platform.
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antibacterial and irritant activities of organic solvent extracts of agave americana linn albizzia lebbek benth achyranthes aspera linn and Abutilon indicum linn a preliminary investigation
Pakistan Journal of Zoology, 2010Co-Authors: M T J Khan, Khurshid Ahmad, M N Alvi, B Mansoor, Mohd Saeed, F Z Khan, Muhammad JamshaidAbstract:Hexane, chloroform and ethanol extracts of leaves of Agave americana L., seeds of Albizzia lebbek Benth and Achyranthes aspera L., and the whole plant of Abutilon indicum were tested for the antibacterial activity against Gram positive and Gram negative bacteria. Ethanol and chlorofonn extracts of Agave americana and Achyranthes aspera and ethanol extract of Albizzia lebbek exhibited mild to moderate antibiotic activity. Vacuum liquid chromatography isolated fractions from chloroform extract of Achyranthes aspera displayed antibacterial activity against Bacillus subtilis, Escherichia coli and Pseudomonas aeruginosa. The antibacterial range of ethanol extract of Abutilon indicum was prominent than those of other organic extracts. Chloroform and ethanol extracts of Agave americana exhibited acute as well as chronic irritant activity on applying to the inner ear of male albino rabbits.
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antibacterial and irritant activities of organic solvent extracts of agave americana linn albizzia lebbek benth achyranthes aspera linn and Abutilon indicum linn a preliminary investigation
Pakistan Journal of Zoology, 2010Co-Authors: M T J Khan, Khurshid Ahmad, M N Alvi, B Mansoor, F Z Khan, Muhammad Saeed, Muhammad JamshaidAbstract:Hexane, chloroform and ethanol extracts of leaves of Agave americana L., seeds of Albizzia lebbek Benth and Achyranthes aspera L., and the whole plant of Abutilon indicum were tested for the antibacterial activity against Gram positive and Gram negative bacteria. Ethanol and chlorofonn extracts of Agave americana and Achyranthes aspera and ethanol extract of Albizzia lebbek exhibited mild to moderate antibiotic activity. Vacuum liquid chromatography isolated fractions from chloroform extract of Achyranthes aspera displayed antibacterial activity against Bacillus subtilis, Escherichia coli and Pseudomonas aeruginosa. The antibacterial range of ethanol extract of Abutilon indicum was prominent than those of other organic extracts. Chloroform and ethanol extracts of Agave americana exhibited acute as well as chronic irritant activity on applying to the inner ear of male albino rabbits.
Diana Hofmann - One of the best experts on this subject based on the ideXlab platform.
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interspecies cooperations of Abutilon theophrasti with root colonizing microorganisms disarm boa oh allelochemicals
Plant Signaling & Behavior, 2017Co-Authors: Margot Schulz, Dieter Sicker, Oliver Schackow, Lothar Hennig, Diana Hofmann, Ulrich Disko, Andrey Yurkov, Meike Siebers, Cristina Ganimede, Letizia MondaniAbstract:ABSTRACTA facultative, microbial micro-community colonizing roots of Abutilon theophrasti Medik. supports the plant in detoxifying hydroxylated benzoxazolinones. The root micro-community is composed of several fungi and bacteria with Actinomucor elegans as a dominant species. The yeast Papiliotrema baii and the bacterium Pantoea ananatis are actively involved in the detoxification of hydroxylated benzoxazolinones by generating H2O2. At the root surface, laccases, peroxidases and polyphenol oxidases cooperate for initiating polymerization reactions, whereby enzyme combinations seem to differ depending on the hydroxylation position of BOA-OHs. A glucosyltransferase, able to glucosylate the natural benzoxazolinone detoxification intermediates BOA-5- and BOA-6-OH, is thought to reduce oxidative overshoots by damping BOA-OH induced H2O2 generation. Due to this detoxification network, growth of Abutilon theophrasti seedlings is not suppressed by BOA-OHs. Polymer coats have no negative influence. Alternatively, ...
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6-Hydroxy-5-nitrobenzo[d]oxazol-2(3H)-one—A degradable derivative of natural 6-Hydroxybenzoxazolin-2(3H)-one produced by Pantoea ananatis
Taylor & Francis Group, 2017Co-Authors: Margot Schulz, Dieter Sicker, Oliver Schackow, Lothar Hennig, Diana Hofmann, Ulrich Disko, Marina Ventura, Kateryna BasyukAbstract:Pantoea ananatis is a bacterium associated with other microorganisms on Abutilon theophrasti Medik. roots. It converts 6-hydroxybenzoxazolin-2(3H)-one (BOA-6-OH), a hydroxylated derivative of the allelochemical benzoxazolin-2(3H)-one, into 6-hydroxy-5-nitrobenzo[d]oxazol-2(3H)-one. The compound was identified by NMR and mass spectrometric methods. In vitro synthesis succeeded with Pantoea protein, with isolated proteins from the Abutilon root surface or with horseradish peroxidase in the presence of nitrite and H2O2. Nitro-BOA-6-OH is completely degraded further by Pantoea ananatis and Abutilon root surface proteins. Under laboratory conditions, 6-hydroxy-5-nitrobenzo[d]oxazol-2(3H)-one inhibits Lepidium sativum seedling growth whereas Abutilon theophrasti is much less affected. Although biodegradable, an agricultural use of 6-hydroxy-5-nitrobenzo[d]oxazol-2(3H)-one is undesirable because of the high toxicity of nitro aromatic compounds to mammals
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Abutilon theophrasti s defense against the allelochemical benzoxazolin 2 3h one support by actinomucor elegans
Journal of Chemical Ecology, 2014Co-Authors: Margot Schulz, Diana Hofmann, Sevda Haghi Kia, Emmanuel Ayah, Alexander Schouten, Carmen Mullenborn, Christian Paetz, Bernd Schneider, Ulrich DiskoAbstract:Abutilon theophrasti Medik., previously found to be rather insensitive to benzoxazinoid containing rye mulch and the allelochemical benzoxazolin-2(3H)-one (BOA), can be associated with the zygomycete Actinomucor elegans, whereby the fungus colonizes the root relatively superficially and mainly in the maturation zone. The fungus mitigates necrosis of the cotyledons when seedlings are incubated with 2 mM BOA, in contrast to those that lack the fungus. In liquid cultures of the fungus, tryptophan was identified. The accumulation of tryptophan is increased in presence of BOA. This amino acid seems to be important in protecting Abutilon against BOA and its derivatives since it suppressed the accumulation of BOA derived, highly toxic 2-aminophen-oxazin-3-one (APO) in the medium and on the root surface during BOA incubations of Abutilon seedlings. Although A. elegans is insensitive to BOA and APO, the fungus is not able to protect the plant against harmful effects of APO, when seedlings are treated with the compound. Abutilon can detoxify BOA via BOA-6-OH glucosylation probably by a cell wall associated glucosyltransferase, but only low amounts of the product accumulate. Low tryptophan concentrations can contribute to a degradation of the toxic intermediate BOA-6-OH by Fenton reactions, whereby the amino acid is oxidized. One of the oxidation products was identified as 4(1H)-quinolinone, which is the core substructure of the quorum sensing molecule 2-heptyl-3-hydroxy-4-quinolone. The mutualistic association of Abutilon theophrasti with Actinomucor elegans is considered as opportunistic and facultative. Such plant-fungus associations depend rather likely on environmental conditions, such as the mode of fertilization.
Mingchun Liu - One of the best experts on this subject based on the ideXlab platform.
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Abutilon theophrasti medic episperms as a total flavonoids fraction for pharmaceutical applications in vitro antioxidant antibacterial anti inflammatory activities extraction technology and hplc ms profiles
Industrial Crops and Products, 2019Co-Authors: Chunlian Tian, Cancan Cui, Hong Wang, Yuru Guo, Peng Qiu, Mingchun LiuAbstract:Abstract Abutilon theophrasti Medic. is widely distributed around the world, and the episperms part is rich in phenols and flavonoids compounds. The current study focused on the extraction technology, components analysis, in vitro antioxidant, antibacterial, and anti-inflammatory activities of total flavonoids from Abutilon theophrasti Medic. episperms. The extraction process of total flavonoids fraction was optimized by response surface method, and the antioxidant, antibacterial, and anti-inflammatory activities were evaluated with the assay of radical scavenging activity and reducing power, micro-dilution broth method, and lipopolysaccharide induced mouse mononuclear macrophage leukemia cells RAW 264.7 model, respectively. The maximum extraction yield was achieved with concentration of ethanol solution 10%, ratio of solvent to material 30:1 ml/g, and ultrasonic extraction time 29.52 min. Moreover, seven compositions from total flavonoids fraction were detected separately, and four compounds were identified by high performance liquid chromatography-diode array detector-electrospray ionization-mass spectran. In addition, total flavonoids fraction from Abutilon theophrasti Medic. episperms exhibited a better antioxidant activity demonstrated by ferric ion reducing antioxidant power, 2, 2′ - azino - bis (3-ethylbenzothiazoline -6-sulfonic acid diammonium salt, and 2, 2 -diphenyl -1-picrylhydrazyl radicals scavenging ability, and antibacterial against Escherichia coli, Salmonella, Staphyloccocus aureus, and Streptococcus, and anti-inflammatory activities in lipopolysaccharide induced RAW 264.7 cells. In a word, the present findings suggest that the total flavonoids fraction from Abutilon theophrasti Medic. episperms was a very interesting candidate for the research and development of natural and healthy antioxidant, antibacterial, and anti-inflammatory agent for food, pharmaceutical, and medicine industries.
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Chemical compositions, extraction technology, and antioxidant activity of petroleum ether extract from Abutilon theophrasti Medic. leaves
'Informa UK Limited', 2018Co-Authors: Chunlian Tian, Hong Wang, Yuru Guo, Xiang Gao, Jie Yang, Mingchun LiuAbstract:Petroleum ether extract from Abutilon theophrasti Medic. leaves was optimized by response surface methodology, and the optimal extraction conditions were as follows: ratio of solvent to material (20.12 mL/g), extraction time (5.45 h), and Soxhlet extraction temperature (61.32°C). And the yield of petroleum ether extract collected in August, September, and October was (2.05 ± 0.02)%, (2.39 ± 0.01)%, and (2.32 ± 0.02)%, respectively. The September and October extracts exhibited a better antioxidant activity, which was proved by DPPH·scavenging ability (IC50 value of 327.5 and 331.5 μg/mL), ABTS·+ scavenging ability (IC50 value of 170.1 and 182.1 μg/mL), and reducing power (0.31 and 0.28 mmol Fe2+/100 μg/mL). Meanwhile, the gas chromatograph-mass spectrometry analysis revealed that the main antioxidant components contained 9, 12, 15-octadecatrienoic acid and 9, 12, 15-octadecatrienoic acid, ethyl ester (Z,Z,Z) in three petroleum ether extracts. Therefore, petroleum ether extract from Abutilon theophrasti Medic. leaves can be a potential resource of natural antioxidants in pharmaceutical, medicine, food, and chemical industries
