Effect of Chromium on the Axenic Growth and Phosphatase Activity of Ectomycorrhizal Fungi, Laccaria laccata and Suillus bovinus

Raman, N.; Srinivasan, V.; Ravi, Manish

doi:10.1007/s001280292

Cited by 8 publications

(6 citation statements)

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“…However, this inhibition was >50% (when compared to control) only at the higher Ni 2+ tested concentrations (0.2 and 0.8 mM). The inhibition of macrofungi growth by toxic metals was previously demonstrated in several ectomycorrhizal fungi, namely, aluminum, zinc, copper, chromium, cadmium, and lead for Laccaria laccata − ; cadmium, copper, lead, zinc, and chromium for Suillus bovinus , ; cadmium, copper, lead, and zinc for Hebeloma crustuliniforme, Suillus luteus, and Lactarius turpis ; aluminum, cadmium, copper, lead, and zinc for Paxillus involutus , ; aluminum, arsenic, cadmium, chromium, nickel, and lead for Laccaria fraterna ; and aluminum, arsenic, cadmium, chromium, nickel, lead, iron, copper, and zinc for Pisolithus tinctorius − . Among all of the heavy metals tested, Ni was indicated to be the most toxic as expressed by the growth decrease and ectomycorrhiza formation .…”

Section: Discussionmentioning

confidence: 77%

Tolerance and Stress Response of Macrolepiota procera to Nickel

Baptista

Ferreira

Soares

et al. 2009

J. Agric. Food Chem.

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Nickel (Ni) is an essential element for many organisms; however, it is very toxic at high concentrations and also depending on the species. In macrofungi the mechanisms underlying their Ni tolerance are poorly documented. This study examines, for the first time, the participation of the antioxidative system in Macrolepiota procera exposed to different Ni2+ concentrations and their relation with Ni tolerance. The effect of the pH on Ni tolerance was also evaluated. The fungus was cultivated on solid medium with different NiCl2 concentrations (0.05, 0.2, 0.8 mM) at pH 4, 6, and 8, and fungi growth and Ni uptake were determined. The antioxidative enzymes catalase (CAT) and superoxide dismutase (SOD) and the production of hydrogen peroxide H2O2 were evaluated on fungal submerged cultures within the first hours of Ni2+ exposure. Results showed that M. procera growth decreased when Ni2+ concentrations increased, reaching a maximum growth inhibition (>80%) up to 0.2 mM of NiCl2. Ni uptake increased proportionally to Ni increase in the medium. Both Ni tolerance and Ni accumulation were affected by medium pH. Microscope observations showed differences in the size of spores produced by fungi at different Ni concentrations. Ni exposure induced oxidative stress, as indicated by the production of H2O2, the levels of which seem to be regulated by the antioxidant enzymes SOD and CAT. The time variation pattern of SOD and CAT activities indicated that the former has a greater role in alleviating the stress. The results obtained suggested that tolerance of M. procera to Ni2+ is associated with the ability of this macrofungus to initiate an efficient antioxidant defense system.

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Section: Discussionmentioning

confidence: 77%

Tolerance and Stress Response of Macrolepiota procera to Nickel

Baptista

Ferreira

Soares

et al. 2009

J. Agric. Food Chem.

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“…Raman and Sambandan (1998) have also reported that the high concentration of metals reduces the growth and protein content in mycorrhizal fungi. Raman et al (2002) have reported that the biomass decreased with increasing concentration of chromium in Laccaria laccata and Suillus bovinus. Higher concentrations of Cr adversely affect the growth of microorganisms and interfere with nucleic acid synthesis (Ogawa et al 1989).…”

Section: Removal Of Chromium By R Leguminosarummentioning

confidence: 97%

Removal of chromium using Rhizobium leguminosarum

Raaman

Mahendran

Jaganathan

et al. 2011

World J Microbiol Biotechnol

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The chromium (Cr(III) and Cr(VI)) removal capability of Rhizobium leguminosarum was checked by estimating the amount of chromium in the medium before and after inoculation. To determine the efficiency of R. leguminosarum in removal of chromium, the influence of physical and chemical parameters such as temperature, pH and different concentrations (0.1-1.0 mM) of trivalent (Cr(III)) and hexavalent (Cr(VI)) chromium were studied. The chromium removal in aqueous solution by different size of active and inactivated biomass and immobilized cells of R. leguminosarum in a packed-bed column was also carried out. Results showed that in a medium containing up to 0.5 mM concentration of both Cr(III) and Cr(VI), R. leguminosarum showed optimal growth. The maximum chromium removal was at pH 7.0 and 35°C. Active biomass removed 84.4 ± 3.6% of Cr(III) and 77.3 ± 4.3% of Cr(VI) in 24 h of incubation time. However, inactivated biomass removed maximum chromium after 36 h of incubation. Immobilized bacterial cells in a packed-bed column removed 86.4 ± 1.7% of Cr(III) and 83.8 ± 2.2% of Cr(VI) in 16 and 20 h of incubation time, respectively.

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“…Penicillium ochrochloron precipitated cupric oxalate and cupric phosphate (Crusberg, 2004), whereas Penicillium cyclopium removed up to 95% supplied lead in the presence of phosphate (Tsekova et al, 2006). Laccaria laccata and Suillus bovinus have also been shown to produce more acid phosphatase in the presence of high concentrations of Cr (VI) (Raman et al, 2002). Under conditions of Cu and Cd toxicity, the ectomycorrhizal fungus Xerocomus chrysenteron was exuded soluble protein and acid phosphatase that appeared to be involved in metal tolerance and precipitation (Zheng et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

“…Under conditions of Cu and Cd toxicity, the ectomycorrhizal fungus Xerocomus chrysenteron was exuded soluble protein and acid phosphatase that appeared to be involved in metal tolerance and precipitation (Zheng et al, 2009). Laccaria laccata and Suillus bovinus have also been shown to produce more acid phosphatase in the presence of high concentrations of Cr (VI) (Raman et al, 2002).…”

Section: Introductionmentioning

confidence: 99%

Phosphatase‐mediated bioprecipitation of lead by soil fungi

Liang

Kierans

Ceci

et al. 2015

Environmental Microbiology

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Geoactive soil fungi were examined for their ability to release inorganic phosphate (Pi ) and mediate lead bioprecipitation during growth on organic phosphate substrates. Aspergillus niger and Paecilomyces javanicus grew in 5 mM Pb(NO3)2-containing media amended with glycerol 2-phosphate (G2P) or phytic acid (PyA) as sole P sources, and liberated Pi into the medium. This resulted in almost complete removal of Pb from solution and extensive precipitation of lead-containing minerals around the biomass, confirming the importance of the mycelium as a reactive network for biomineralization. The minerals were identified as pyromorphite (Pb5(PO4)3Cl), only produced by P. javanicus, and lead oxalate (PbC2O4), produced by A. niger and P. javanicus. Geochemical modelling of lead and lead mineral speciation as a function of pH and oxalate closely correlated with experimental conditions and data. Two main lead biomineralization mechanisms were therefore distinguished: pyromorphite formation depending on organic phosphate hydrolysis and lead oxalate formation depending on oxalate excretion. This also indicated species specificity in biomineralization depending on nutrition and physiology. Our findings provide further understanding of lead geomycology and organic phosphates as a biomineralization substrate, and are also relevant to metal immobilization biotechnologies for bioremediation, metal and P biorecovery, and utilization of waste organic phosphates.

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Effect of Chromium on the Axenic Growth and Phosphatase Activity of Ectomycorrhizal Fungi, Laccaria laccata and Suillus bovinus

Cited by 8 publications

References 0 publications

Tolerance and Stress Response of Macrolepiota procera to Nickel

Tolerance and Stress Response of Macrolepiota procera to Nickel

Removal of chromium using Rhizobium leguminosarum

Phosphatase‐mediated bioprecipitation of lead by soil fungi

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