Localization and induction of oxalate decarboxylase in the brown-rot wood decay fungus Postia placenta

Micales, Jessie A.

doi:10.1016/s0964-8305(97)00009-7

Cited by 57 publications

(48 citation statements)

References 13 publications

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“…68,69 Phenolic exudates are also reported to increase the availability of micro and macronutrients by formation of organic metal complexes. 70 depends on the host genome. Therefore, phenolic compounds could enhance the initial stages of AM establishment, but root penetration and AM development are likely regulated by the host plant and subsequent interactions with the fungal partner.…”

Section: Rhizobium-legume Symbiosismentioning

confidence: 99%

Phenolic acids act as signaling molecules in plant-microbe symbioses

Mandal

Chakraborty

Dey

2010

Plant Signaling & Behavior

607

326

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Section: Rhizobium-legume Symbiosismentioning

confidence: 99%

Phenolic acids act as signaling molecules in plant-microbe symbioses

Mandal

Chakraborty

Dey

2010

Plant Signaling & Behavior

607

326

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“…By contrast, the enzymatic degradative system of white-rot fungi has an optimal pH action much higher (pH around 3e4,5, and exceptionally 5; Westermark and Ericksson, 1974;Hatakka, 1994;Swamy and Ramsay, 1999), and thus enzymatic rather than abiotic degradation could be favored. In the process of lignin degradation by white-rot fungi, degradation of oxalate by the oxalate decarboxylase (Micales, 1997;Watanabe et al, 2003) or the oxalate oxidase (Dutton and Evans, 1996) could degrade oxalate as a source of H 2 O 2 that can be utilized afterwards as an oxidant by lignin or manganese peroxidase (for example see Kuan and Tien, 1993). In addition, the activity of an intracellular oxalate decarboxylase has been shown in at least four species of white-rot fungi (Dichomitus squalens, Phanerochaete sanguinea, Trametes ochracea, and T. versicolor), which was also tentatively assigned to a role in the production of important intermediates in the degradation of lignin (Makela et al, 2002).…”

Section: Calcium Oxalate Disappearancementioning

confidence: 99%

Experimental calcium-oxalate crystal production and dissolution by selected wood-rot fungi

Guggiari

Bloque

Aragno

et al. 2011

International Biodeterioration & Biodegradation

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a b s t r a c tTwenty-six species of white-rotting Agaricomycotina fungi (Basidiomycota) were screened for their ability to produce calcium-oxalate (CaOx) crystals in vitro. Most were able to produce CaOx crystals in malt agar medium in the absence of additional calcium. In the same medium enriched with Ca 2þ , all the species produced CaOx crystals (weddellite or whewellite). Hyphae of four species (Ganoderma lucidum, Polyporus ciliatus, Pycnoporus cinnabarinus, and Trametes versicolor) were found coated with crystals (weddellite/whewellite). The production of CaOx crystals during the growth phase was confirmed by an investigation of the production kinetics for six of the species considered in the initial screening (Pleurotus citrinopileatus, Pleurotus eryngii, Pleurotus ostreatus, P. cinnabarinus, Trametes suaveolens, and T. versicolor). However, the crystals produced during the growth phase disappeared from the medium over time in four of the six species (P. citrinopileatus, P. eryngii, P. cinnabarinus, and T. suaveolens). For P. cinnabarinus, the disappearance of the crystals was correlated with a decrease in the total oxalate concentration measured in the medium from 0.65 mg mm À2 (at the maximum accumulation rate) to 0.30 mg mm À2. The decrease in the CaOx concentration was correlated with a change in mycelia morphology. The oxalate dissolution capability of all the species was also tested in a medium containing calcium oxalate as the sole source of carbon (modified Schlegel medium). Three species (Agaricus blazei, Pleurotus tuberregium, and P. ciliatus) presented a dissolution halo around the growth zone. This study shows that CaOx crystal production is a widespread phenomenon in white-rot fungi, and that an excess of Ca 2þ can enhance CaOx crystal production. In addition, it shows that some white-rot fungal species are capable of dissolving CaOx crystals after growth has ceased. These results highlight a diversity of responses around the production or dissolution of calcium oxalate in white-rot fungi and reveal an unexpected potential importance of fungi on the oxalate cycle in the environment.

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“…Such fungi have their value in bioremedaition of CCA (copper, chromium, arsenic) or CCB (copper, chromium, boron) treated wood waste by complexing the metals through oxalic acids (Samuel et al 2003). Oxalate decarboxylases of these fungi converting oxalic acid to formic acid and carbon dioxide and providing a buffered environment facilitaing the wood decay process have found some interest in the past (Micales 1997) but otherwise enzymes in this group of fungi found so far little interest. A first genome of a brown-rot has recently been released to the public (Postia placenta; http://genome.jgi-psf.org/Pospl1/Pospl1.home.html) and with Serpula lacrymans a second brown-rot genome is pending for sequencing (http://www.jgi.doe.gov/ sequencing/allinoneseqplans.php).…”

Section: Discussionmentioning

confidence: 99%

Wood production, wood technology, and biotechnological impacts

Kües¹

2007

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Localization and induction of oxalate decarboxylase in the brown-rot wood decay fungus Postia placenta

Cited by 57 publications

References 13 publications

Phenolic acids act as signaling molecules in plant-microbe symbioses

Phenolic acids act as signaling molecules in plant-microbe symbioses

Experimental calcium-oxalate crystal production and dissolution by selected wood-rot fungi

Wood production, wood technology, and biotechnological impacts

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