Ionic nutrition of yeast—physiological mechanisms involved and implications for biotechnology

Jones, Rodney; Gadd, Geoffrey M.

doi:10.1016/0141-0229(90)90051-q

Cited by 117 publications

(72 citation statements)

References 145 publications

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“…The kinetics of monovalent cation transport are complex, with more than one binding site involved in translocation, and may be affected bv the surface and membrane potential (Borst-Pauwels, 1981;Jones & Gadd, 1990). Kinetic deviations in Kû ptake are found at low pH and also at high pH in the presence of other monovalent and divalent ions, e.g.…”

Section: Transport Of Toxic Metal Cations*mentioning

confidence: 99%

“…Both the electrical component (A^) and the chemical component (ApH) of the proton gradient (A/7H+) can vary with the external and intracellular pH and the external ion concentration thus affecting transport (Jones & Gadd, 1990). In yeast cells a (A/7^+) of approximately -150mV at pH 4-5 to -90 mV at pH 7-0 is maintained (De la Pena et al, 1982).…”

Section: Transport Of Toxic Metal Cations*mentioning

confidence: 99%

“…Biotechnological discussion relates only to the use of fungal biomass and products for environmental protection. Several important topics such as the roles of essential metal ions in fungal metabolism and differentiation (Jones & Gadd, 1990), yeast flocculation (Kuriyama, Umeda & Kobayashi, 1991), iron acquisition and function (Winkelmann, Van der Helm & Neilands, 1987;Winkelmann, 1992), interactions of metals with lichens (Nieboer, Richardson & Tomassini, 1978;Nash, 1990) and (organo)metal-containing fungicides and their effects (Cooney & Wuertz, 1989) are not covered in detail.…”

Section: G M Gaddmentioning

confidence: 99%

“…Such results may be explained by the existence of two K* transport systems or one system operating in two different ways. In addition, the Na'^/K^ selectivity of yeast depends on the stage of growth, a greater proportion of K"^ being accumulated in the logarithmic phase than in the stationary phase (Rodriguez-Navarro & Ramos, 1984;Jones & Gadd, 1990).…”

Section: Transport Of Toxic Metal Cations*mentioning

confidence: 99%

“…The main function of the mitochondrial ATPase is ATP synthesis via the mitochondrial respiratory chain. It is the plasma membrane and vacuolar ATPases that are associated with ion transport and intracellular compartmentation (see later) and regulation of intracellular pH (Jones & Gadd, 1990). …”

Section: Transport Of Toxic Metal Cations*mentioning

confidence: 99%

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Interactions of fungi with toxic metals

1993

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SUMMARY This review details the major interactions of fungi with toxic metal species. Physico‐chemical and biological aspects are discussed including definitions and classification of metals in biological contexts, mechanisms of metal fungitoxicity, resistance and tolerance, environmental influences and the occurrence of fungi in metal‐polluted habitats. Cellular interactions include extracellular precipitation and complexation, binding to cell walls, transport of monovalent and divalent metal cations, intracellular fates of toxic metal species (including metal‐binding proteins and peptides, and vacuolar compartmentation), and metal transformations including organometal(loid) synthesis. Significant interactions between metals and mycorrhizal fungi and macrofungi are summarized with reference to the amelioration of plant phytotoxicity and metal accumulation respectively. Biotechnological aspects of metal‐fungal interactions relate to the biological treatment of metal‐contaminated effluents and waste streams for metal removal/recovery and environmental protection.

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Section: Transport Of Toxic Metal Cations*mentioning

confidence: 99%

Section: Transport Of Toxic Metal Cations*mentioning

confidence: 99%