Degradation of 3,5-dinitro-o-cresol by Rhizobium and Azotobacter SPP.

Hamdi, Y.A.; Tewfik, M.S.

doi:10.1016/0038-0717(70)90003-9

Cited by 20 publications

(5 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The versatility of rhizobia in utilizing aromatic substances has been studied (Hamdi and Tewfik 1970;Hussien et al 1974;Parker et al 1977;Glenn and Dilworth 1981;Muthukumar et al 1982;Parke and Ornston 1984;Chen et al 1984). Nutritional diversity of the Rhizobiaceae to different phenolic substances has been surveyed (Parke and Ornston 1984) and chemotaxis of rhizobia to aromatic compounds has been demonstrated (Parke et al 1985).…”

Section: Introductionmentioning

confidence: 99%

Utilization of catechin and its metabolites by Bradyrhizobium japonicum

Hopper

Mahadevan

1991

Appl Microbiol Biotechnol

View full text Add to dashboard Cite

Catechin, a condensed tannin was utilized as sole carbon source by Bradyrhizobium japonicum. Protocatechuic acid, phloroglucinolcarboxylic acid, phloroglucinol, resorcinol and hydroxyquinol were identified as intermediates of catechin degradation. The aromatic substrates favoured good growth up to 5 or 10 mM. B. japonicum tolerated up to 50 mM catechin and phloroglucinolcarboxylic acid, 40 mM phloroglucinol and resorcinol, 30 mM protocatechuic acid and 10 mM hydroxyquinol. Catechin-induced cells oxidized catechin more rapidly than uninduced cells. The two final ring compounds of the catechin catabolic pathway, protocatechuic acid and hydroxyquinoL were oxidized differentially. The enzymes of the catechin degradative pathway were inducible in B. japonicum.

show abstract

Section: Introductionmentioning

confidence: 99%

Utilization of catechin and its metabolites by Bradyrhizobium japonicum

Hopper

Mahadevan

1991

Appl Microbiol Biotechnol

View full text Add to dashboard Cite

show abstract

“…4-Amino-2-methyl-6-nitrophenol, 5-amino-3-methylcatechol, and 2,4,5-trihydroxytoluene were postulated as metabolites of DNOC. In contrast to reduction of the nitro groups of DNOC, several authors describe that microbial degradation of DNOC is indicated by accumulation of nitrite and decoloration of the culture fluid (9,10,14,15).…”

mentioning

confidence: 99%

Initial hydrogenation and extensive reduction of substituted 2,4-dinitrophenols

Lenke¹,

Knackmuss²

1996

Appl Environ Microbiol

View full text Add to dashboard Cite

Rhodococcus erythropolis HL 24-1 isolated as a 2,4-dinitrophenol-degrading organism can utilize 2-chloro-4,6-dinitrophenol as the sole nitrogen, carbon, and energy source under aerobic conditions. This compound is metabolized with liberation of stoichiometric amounts of chloride and nitrite. Under anaerobic conditions, 2,4-dinitrophenol was transiently accumulated in the culture fluid, indicating a reductive elimination of chloride. During aerobic bioconversion of 2-amino-4,6-dinitrophenol by R. erythropolis HL 24-1, a reductive elimination of nitrite leading to 2-amino-6-nitrophenol was observed. Elimination of chloride or nitrite by the initial formation of a hydride Meisenheimer complex is discussed. A methyl group in the ortho position of the 2,4-dinitrophenol gives rise to an extensive reduction of the aromatic ring under aerobic conditions. Thus, 2-methyl-4,6-dinitrophenol was shown to be converted to the two diastereomers of 4,6-dinitro-2-methylhexanoate as dead-end metabolites which were identified by spectroscopic methods.

show abstract

“…2 ), also has once been reported to be able to grow within lignin as carbon source 39 . Moreover, Azotobacter are capable of degrading many molecules with complicated structures, such as phenols 40 41 , carbohydrates 42 and organic acids 43 . It could be speculated that Azotobacter played an important role in the retting process by degrading lignins and waxes.…”

Section: Discussionmentioning

confidence: 99%

Bacterial succession and metabolite changes during flax (Linum usitatissimum L.) retting with Bacillus cereus HDYM-02

Zhao

Liu

Pan

et al. 2016

Sci Rep

View full text Add to dashboard Cite

High-throughput sequencing and GC-MS (gas chromatography-mass spectrometry) were jointly used to reveal the bacterial succession and metabolite changes during flax (Linum usitatissimum L.) retting. The inoculation of Bacillus cereus HDYM-02 decreased bacterial richness and diversity. This inoculum led to the replacement of Enterobacteriaceae by Bacillaceae. The level of aerobic Pseudomonadaceae (mainly Azotobacter) and anaerobic Clostridiaceae_1 gradually increased and decreased, respectively. Following the addition of B. cereus HDYM-02, the dominant groups were all degumming enzyme producers or have been proven to be involved in microbial retting throughout the entire retting period. These results could be verified by the metabolite changes, either degumming enzymes or their catalytic products galacturonic acid and reducing sugars. The GC-MS data showed a clear separation between flax retting with and without B. cereus HDYM-02, particularly within the first 72 h. These findings reveal the important bacterial groups that are involved in fiber retting and will facilitate improvements in the retting process.

show abstract

Degradation of 3,5-dinitro-o-cresol by Rhizobium and Azotobacter SPP.

Cited by 20 publications

References 3 publications

Utilization of catechin and its metabolites by Bradyrhizobium japonicum

Utilization of catechin and its metabolites by Bradyrhizobium japonicum

Initial hydrogenation and extensive reduction of substituted 2,4-dinitrophenols

Bacterial succession and metabolite changes during flax (Linum usitatissimum L.) retting with Bacillus cereus HDYM-02

Contact Info

Product

Resources

About