Decomposition of Plant Tannins by Some Soil Microorganisms

Lewis, Jan; Starkey, Robert L.

doi:10.1097/00010694-196904000-00001

Cited by 87 publications

(40 citation statements)

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“…Nevertheless, some microorganisms degrade this compound by producing tannase and play an active role in the soil for nutrient recycling through decomposition of tannin-containing plant materials (Lewis and Starkey, 1969). Though a few bacterial strains have been reported to produce tannase (Deschamps et al, 1983;Kumar et al, 1999;, this may be the first observation that B. cereus is also a tannase producer.…”

Section: Resultsmentioning

confidence: 99%

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Production and characterization of tannase from Bacillus cereus KBR9.

Mondal

Banerjee

et al. 2001

J. Gen. Appl. Microbiol.

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A tannase-producing soil bacteria has been isolated and identified as Bacillus cereus. It can degrade tannic acid and produce maximum tannase (0.22 U/ml) at stationary phases of growth (24 h). Maximum growth and enzyme production occurred with initial medium pH of 4.5-5.0. Partial purified tannase showed optimum activity at pH 4.5 and 40°C. It remains stable up to 30°C and pH 4.5 to 5.0. The enzyme is salt tolerant, stable up to 2 M of NaCl and retains 82% original activity in 3 M.

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Section: Resultsmentioning

confidence: 99%

“…Tannic acid is a polyphenolic compound, because of which it is generally considered an antinutrient and antimicrobial agent (Lewis and Starkey, 1969). But a large number of fungi have been reported to degrade tannins by producing tannase (Bhat et al, 1998;Lekha and Lonsane, 1997).…”

Section: Introductionmentioning

confidence: 99%

Production and characterization of tannase from Bacillus cereus KBR9.

Mondal

Banerjee

et al. 2001

J. Gen. Appl. Microbiol.

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“…Many microorganisms (4,8) especially fungi are known to produce this enzyme both as membrane bound and extracellular forms. This enzyme is extremely important in the recycling of plant biomass (I1), in treating tannery effluents and also in the production of gallic acid, a chemical used in pharmaceuticals (6).…”

mentioning

confidence: 99%

Screening of extracellular tannase-producing fungi: Development of a rapid and simple plate assay.

Bradoo

Gupta

Saxena

1996

J. Gen. Appl. Microbiol.

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“…Numerous studies have documented tannase-producing microorganisms since the discovery of tannase in 1867 (van Tieghem 1867), even if, tannaseproducing bacteria have been less studied (Aguilar-Zárate et al 2014). To the authors' knowledge, the fi rst study reporting that bacteria, an Achromobacter sp., was capable of hydrolysing tannins as sole energy source was reported by Lewis and Starkey (1969). Since then the interest on tannin-degrading bacteria has increased and isolation of new strains from different sources have been reported (Aguilar-Zárate et al 2014).…”

Section: Discussionmentioning

confidence: 99%

Extracellular tannase-producing bacteria detected in the digestive tracts of freshwater fishes (Actinopterygii: Cyprinidae and Cichlidae)

Talukdar¹,

Ringø²,

Ghosh³

2016

Acta Ichthyol. Piscat.

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Talukdar S., Ringø E., Ghosh K. 2016. Extracellular tannase-producing bacteria detected in the digestive tracts of freshwater fi shes (Actinopterygii: Cyprinidae and Cichlidae). Acta Ichthyol. Piscat. 46 (3): 201-210.Background. Although, presence of tannase-producing and/or tannin tolerant gut bacteria has been documented in ruminants and non-ruminant herbivores, the topic is rarely addressed in fi sh. The present study aimed at enumeration of autochthonous tannase-producing bacteria in the gut of freshwater teleosts. Gastrointestinal (GI) tracts of the fi sh studied were divided into proximal (PI) and distal (DI) parts, homogenized and plated onto Tryptone Soya Agar (TSA) plates. The pure colonies were spotted on selective tannic acid (TA) agar plates to determine the tannase-producing bacteria. Extracellular tannase-producing capacity of the isolates was determined through qualitative and quantitative assay using TA media plates or broth, respectively at three different pH levels (5.5, 7.0, and 8.5). Further, 16S rRNA gene fragments of the promising tannase-producing bacteria were sequenced, aligned, analysed, identifi ed, and deposited to the GenBank. Results. Totally 685 strains were isolated on TSA plates, of which 116 strains (37 from PI and 79 from DI) grow on TA media and were defi ned as tannase-producers. The highest percentage of tannase-producing strains was noticed in the DI regions of grass carp, Ctenopharyngodon idella (38.98%), and tilapia, Oreochromis niloticus (37.74%). The lowest frequency of tannase-producing bacteria was revealed in PI region of catla, Catla catla (2.12%). The intestine of Indian major carps was relatively poorly colonized by tannase-producing bacteria compared to that of exotic carps. Evaluation of tannase-producing capacity revealed that the majority of the isolates exhibited maximum extracellular tannase production at pH 7.0. Quantitative evaluation, showed highest tannase activity by strain HMT1 (0.28 ± 0.001 U) isolated from silver carp, Hypophthalmichthys molitrix, followed by strains ONH2Ph (0.19 ± 0.005) and ONH13B (0.17 ± 0.009 U) isolated from tilapia. Analyses of the 16S rRNA partial gene sequences revealed that strains ONH2Ph and ONH13B showed high similarity to Bacillus subtilis (KP765736) and Brevibacillus agri (KP765734), respectively. Whereas, strain HMT1 was most closely related to Klebsiella variicola (KP765735). Conclusions. The study revealed existence of tannase-producing bacterial symbionts within fi sh GI tracts. Tannindegrading bacteria detected in the presently reported study might aid in overcoming the anti-nutritional effects of dietary tannins within fi sh gut.

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Decomposition of Plant Tannins by Some Soil Microorganisms

Cited by 87 publications

References 0 publications

Production and characterization of tannase from Bacillus cereus KBR9.

Production and characterization of tannase from Bacillus cereus KBR9.

Screening of extracellular tannase-producing fungi: Development of a rapid and simple plate assay.

Extracellular tannase-producing bacteria detected in the digestive tracts of freshwater fishes (Actinopterygii: Cyprinidae and Cichlidae)

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