Degradation of juglone by Pseudomonas putida J 1

Rettenmaier, H

doi:10.1016/0378-1097(83)90058-7

Cited by 11 publications

(13 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Juglone has been documented as a potent allelopathic compound (Jose, 2002;Ponder and Tadros, 1985;Rietveld, 1983;Willis, 2000). In Germany, Rettenmaier et al (1983) isolated the bacterium Pseudomonas putida, which can catabolise juglone, from soils beneath walnut trees. The steps involved in juglone degradation are: Juglone fi 3-hydroxyjuglone fi 2,3-dihydroxybenzoate fi 2-hydroxymuconicacid semialdehyde (Rettenmaier et al, 1983).…”

Section: Microorganisms Influence Allelopathic Activitiesmentioning

confidence: 99%

“…In Germany, Rettenmaier et al (1983) isolated the bacterium Pseudomonas putida, which can catabolise juglone, from soils beneath walnut trees. The steps involved in juglone degradation are: Juglone fi 3-hydroxyjuglone fi 2,3-dihydroxybenzoate fi 2-hydroxymuconicacid semialdehyde (Rettenmaier et al, 1983). Schmidt (1988) reported the rapid degradation of juglone in the presence of the soil bacterium, Pseudomonas putida J1 in soils in the USA.…”

Section: Microorganisms Influence Allelopathic Activitiesmentioning

confidence: 99%

See 1 more Smart Citation

Soil Microorganisms: An Important Determinant of Allelopathic Activity

2005

View full text Add to dashboard Cite

Current evidence illustrates the significance of soil microbes in influencing the bioavailability of allelochemicals. This review discusses (i) the significance of soil microorganisms in influencing allelopathic expression, (ii) different ways of avoiding microbial degradation of putative allelochemicals, and (iii) the need of incorporating experiments on microbial modification of allelochemicals in laboratory bioassays for allelopathy. Several climatic and edaphic factors affect the soil microflora; therefore, allelopathy should be assessed in a range of soil types. Allelopathy can be better understood in terms of soil microbial ecology, and appropriate methodologies are needed to evaluate the roles of soil microorganisms in chemicallymediated interactions between plants.

show abstract

Section: Microorganisms Influence Allelopathic Activitiesmentioning

confidence: 99%

Section: Microorganisms Influence Allelopathic Activitiesmentioning

confidence: 99%

Soil Microorganisms: An Important Determinant of Allelopathic Activity

2005

View full text Add to dashboard Cite

show abstract

“…In some cases, the microbial degradation products of the allelopathic chemicals pose potential phytotoxic effects, while some of the microbially transformed products of allelochemicals decrease their level of phytotoxic effect as compared to the original compounds [3], [18], [19], [20], [21], [22], [23], [24], [25]. Several studies reported microbial degradation of previously characterized allelochemicals such as sorgoleone, juglone, benzoxazinoids, and other flavonoids [26], [27], [28], [29], while there is no information available on the degradation of m -tyrosine by means of bacterial isolates.…”

Section: Introductionmentioning

confidence: 99%

Biodegradation of the Allelopathic Chemical m-Tyrosine by Bacillus aquimaris SSC5 Involves the Homogentisate Central Pathway

2013

View full text Add to dashboard Cite

m-Tyrosine is an amino acid analogue, exuded from the roots of fescue grasses, which acts as a potent allelopathic and a broad spectrum herbicidal chemical. Although the production and toxic effects of m-tyrosine are known, its microbial degradation has not been documented yet. A soil microcosm study showed efficient degradation of m-tyrosine by the inhabitant microorganisms. A bacterial strain designated SSC5, that was able to utilize m-tyrosine as the sole source of carbon, nitrogen, and energy, was isolated from the soil microcosm and was characterized as Bacillus aquimaris. Analytical methods such as HPLC, GC-MS, and 1H-NMR performed on the resting cell samples identified the formation of 3-hydroxyphenylpyruvate (3-OH-PPA), 3-hydroxyphenylacetate (3-OH-PhAc), and homogentisate (HMG) as major intermediates in the m-tyrosine degradation pathway. Enzymatic assays carried out on cell-free lysates of m-tyrosine-induced cells confirmed transamination reaction as the first step of m-tyrosine degradation. The intermediate 3-OH-PhAc thus obtained was further funneled into the HMG central pathway as revealed by a hydroxylase enzyme assay. Subsequent degradation of HMG occurred by ring cleavage catalyzed by the enzyme homogentisate 1, 2-dioxygenase. This study has significant implications in terms of understanding the environmental fate of m-tyrosine as well as regulation of its phytotoxic effect by soil microorganisms.

show abstract

“…Accumulation of juglone at phytotoxic levels also depends upon the microbial ecology of soils. The bacterium Pseudomonas putida , isolated from soils beneath walnut in Germany, was shown to convert juglone to 2-hydroxymuconic acid (Rettenmaier et al 1983). Soil ecology is therefore an understudied but important determinant of allelopathic activities (Inderjit 2001).…”

Section: Introductionmentioning

confidence: 99%

Challenges, achievements and opportunities in allelopathy research

Inderjit

Weston

Duke³

2005

Journal of Plant Interactions

View full text Add to dashboard Cite

Allelopathy is defined as the suppression of any aspect of growth and/or development of one plant by another through the release of chemical compounds. Although allelopathic interference has been demonstrated many times using in vitro experiments, few studies have clearly demonstrated allelopathy in natural settings. This difficulty reflects the complexity in examining and demonstrating allelopathic interactions under field conditions. In this paper we address a number of issues related to the complexity of allelopathic interference in higher plants: These are: (i) is a demonstrated pattern or zone of inhibition important in documenting allelopathy? (ii) is it ecologically relevant to explain the allelopathic potential of a species based on a single bioactive chemical? (iii) what is the significance of the various modes of allelochemical release from the plant into the environment? (iv) do soil characteristics clearly influence allelopathic activity? (v) is it necessary to exclude other plant interference mechanisms?, and (vi) how can new achievements in allelopathy research aid in solving problems related to relevant ecological issues encountered in research conducted upon natural systems and agroecosystems? A greater knowledge of plant interactions in ecologically relevant environments, as well as the study of biochemical pathways, will enhance our understanding of the role of allelopathy in agricultural and natural settings. In addition, novel findings related to the relevant enzymes and genes involved in production of putative allelochemicals, allelochemical persistence in the rhizosphere, the molecular target sites of allelochemicals in sensitive plant species and the influence of allelochemicals upon other organisms will likely lead to enhanced utilization of natural products for pest management or as pharmaceuticals and nutraceuticals. This review will address these recent findings, as well as the major challenges which continue to influence the outcomes of allelopathy research.

show abstract

Degradation of juglone by Pseudomonas putida J 1

Cited by 11 publications

References 6 publications

Soil Microorganisms: An Important Determinant of Allelopathic Activity

Soil Microorganisms: An Important Determinant of Allelopathic Activity

Biodegradation of the Allelopathic Chemical m-Tyrosine by Bacillus aquimaris SSC5 Involves the Homogentisate Central Pathway

Challenges, achievements and opportunities in allelopathy research

Contact Info

Product

Resources

About