Aquatic Microbiology with Reference to Tannin Degradation

Mahadevan, A.; Muthukumar, Ganapathy

doi:10.1007/bf00016235

Cited by 28 publications

(14 citation statements)

References 21 publications

(13 reference statements)

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“…Previous studies of Myriophyllum-associated bacteria focused on potential pathogens useful for the biological control of M. spicatum (Chand et al 1992) or on rhizosphere bacteria involved in nitrogen metabolism (Blotnick et al 1980). So far, the majority of studies focusing on tannin-degrading bacteria are either from environments exposed to industrial tannery waste (Chowdhury et al 2004, Franco et al 2005 or from investigations of intestinal bacteria in tannin-feeding invertebrates and vertebrates (Goel et al 2005, Smith et al 2005, while little evidence exists for such specialised bacteria in natural waters, most of them from anaerobic environments (Mahadevan & Muthukumar 1980, Schink et al 2000. In contrast to other major submerged aquatic angiosperms, M. spicatum produces and releases high concentrations of hydrolysable polyphenols (Smolders et al 2000, Choi et al 2002, Gross 2003.…”

Section: Discussionmentioning

confidence: 99%

Degradation of gallic acid and hydrolysable polyphenols is constitutively activated in the freshwater plant-associated bacterium Matsuebacter sp. FB25

Müller¹,

Hempel²,

Philipp³

et al. 2007

Aquat. Microb. Ecol.

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Hydrolysable polyphenols are present in Myriophyllum spicatum L. at high concentrations of up to 25% of dry matter and are also excreted. Bacteria associated with the submerged macrophyte M. spicatum isolated from the surrounding water column and epiphytic biofilm were tested for their ability to degrade polyphenols. Several bacterial isolates were capable of growing with tannic acid as the sole carbon and energy source, among them Matsuebacter sp. FB25, Agrobacterium vitis EB26 and Pseudomonas sp. FB22. Cell suspensions of Matsuebacter sp. precultured on succinate were capable of degrading gallic acid, while those of A. vitis were not, indicating the constitutive presence of gallate-degrading enzymes in the former. When cells were precultured on gallic or tannic acid, cell suspensions of both strains exhibited an enhanced degradation rate of gallic acid. M. spicatum-derived hydrolysable polyphenols, which are comparable in structure to tannic acid, resulted in the same enhanced degradation rate of gallic acid or tellimagrandin II, the major M. spicatum polyphenol, by cell suspensions of Matsuebacter sp. FB25. The presence of polyphenoldegrading bacteria in the vicinity of M. spicatum explains the observed fast disappearance of tellimagrandin II and other hydrolysable polyphenols after excretion and has implications for allelochemical interference with competitors, herbivores and potential pathogenic microorganisms. The presence of Matsuebacter sp. and other polyphenol-degrading strains in such environments suggests a sufficiently strong effect of M. spicatum exudates to bring about selection in favour of highly specialised bacteria.KEY WORDS: Hydrolysable polyphenol · Submerged macrophyte · Allelochemistry · Biofilm · Betaproteobacteria · Burkholderiales · Myriophyllum spicatum · TanninResale or republication not permitted without written consent of the publisher

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Section: Discussionmentioning

confidence: 99%

Degradation of gallic acid and hydrolysable polyphenols is constitutively activated in the freshwater plant-associated bacterium Matsuebacter sp. FB25

Müller¹,

Hempel²,

Philipp³

et al. 2007

Aquat. Microb. Ecol.

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“…Müller et al (2007) were the first to show that distinct bacterial groups isolated from the biofilm and the surrounding water column of the allelopathically active submerged macrophyte M. spicatum are able to degrade polyphenolic allelochemicals. This was surprising as polyphenols are known for their anti-bacterial properties (Walenciak et al, 2002), and polyphenol degrading bacteria were only known from anaerobic environments (Mahadevan and Muthukumar, 1980;Schink et al, 2000). Specialized bacteria in the vicinity of allelopathically active submerged macrophytes might be thus one reason for the rapid disappearance of allelochemicals from the water column.…”

Section: Iiii Factors Influencing Sensitivities Of Algae To Allelocmentioning

confidence: 99%

Allelopathic effects of submerged macrophytes on phytoplankton

Eigemann¹

2017

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“…However, the impacts of R. mangle invasion on benthic ecosystem functioning, in particular, how mangroves modify sediment metabolism and C-remineralization processes in the Hawaiian coastal zone, remain essentially unexplored. Rhizophora mangle detritus is rich in tannins, which can be toxic to benthic detritivores, interfering with digestive enzymes (Mahadevan and Muthukumar, 1980;Neilson et al, 1986;Alongi, 1987;Sessegolo and Lana, 1991). Therefore, we postulate that mangrove invasion will favor microbial C-remineralization processes by limiting macrofaunal consumption and assimilation of detrital carbon (Alongi, 1987;Tietjen and Alongi, 1990;Robertson et al, 1992).…”

mentioning

confidence: 95%

Impacts of exotic mangrove forests and mangrove deforestation on carbon remineralization and ecosystem functioning in marine sediments

et al. 2010

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Abstract. To evaluate how mangrove invasion and removal can modify short-term benthic carbon cycling and ecosystem functioning, we used stable-isotopically labeled algae as a deliberate tracer to quantify benthic respiration and C-flow over 48 h through macrofauna and bacteria in sediments collected from (1) an invasive mangrove forest, (2) deforested mangrove sites 2 and 6 years after removal of above-sediment mangrove biomass, and (3) two mangrove-free control sites in the Hawaiian coastal zone. Sediment oxygen consumption (SOC) rates averaged over each 48 h investigation were significantly greater in the mangrove and mangrove removal site experiments than in controls and were significantly correlated with total benthic (macrofauna and bacteria) biomass and sedimentary mangrove biomass (SMB). Bacteria dominated short-term Cprocessing of added microalgal-C and benthic biomass in sediments from the invasive mangrove forest habitat and in the 6-yr removal site. In contrast, macrofauna were the most important agents in the short-term processing of microalgal-C in sediments from the 2-yr mangrove removal site and control sites. However, mean faunal abundance and C-uptake rates in sediments from both removal sites were significantlyCorrespondence to: A. K. Sweetman (asw@niva.no) higher than in control cores, which collectively suggest that community structure and short-term C-cycling dynamics of sediments in habitats where mangroves have been cleared can remain fundamentally different from un-invaded mudflat sediments for at least 6-yrs following above-sediment mangrove removal. In summary, invasion by mangroves can lead to dramatic shifts in benthic ecosystem function, with sediment metabolism, benthic community structure and shortterm C-remineralization dynamics being affected for years following invader removal.

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Aquatic Microbiology with Reference to Tannin Degradation

Abstract: Tannins in aquatic environment cause harmful effects to aquatic life. They are inhibitory to microbial growth, respiration and metabolism. A few microorganisms degrade tannins and the factors influencing degradation are discussed. The need for coordinated approach is emphasized.

Cited by 28 publications

References 21 publications

Degradation of gallic acid and hydrolysable polyphenols is constitutively activated in the freshwater plant-associated bacterium Matsuebacter sp. FB25

Degradation of gallic acid and hydrolysable polyphenols is constitutively activated in the freshwater plant-associated bacterium Matsuebacter sp. FB25

Allelopathic effects of submerged macrophytes on phytoplankton

Impacts of exotic mangrove forests and mangrove deforestation on carbon remineralization and ecosystem functioning in marine sediments

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