A basidiomycete isolated from a <i>Pisonia</i> mycorrhiza forms sheathing mycorrhizas with transfer cells on <i>Pisonia grandis</i> R. Br.

Cairney, John; Rees, B. J.; Allaway, W. G.; Ashford, A. E.

doi:10.1111/j.1469-8137.1994.tb07533.x

Cited by 23 publications

(7 citation statements)

References 11 publications

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“…The work of Ashford and her colleagues indicates also that, in common with yeasts, short-chain polyphosphate polymers produced by the ECM basidiomycete Pisolithus tinctorius (Pers.) Coker & Couch are stored in the vacuole (Ashford et al, 1986(Ashford et al, , 1994Orlovich & Ashford, 1993). Confirmation of the accumulation of polyphosphates in the vacuole is of considerable significance.…”

Section: Nutrient Absorptionmentioning

confidence: 99%

“…Confirmation of the accumulation of polyphosphates in the vacuole is of considerable significance. Rapid incorporation of P, into polyphosphates following comparttnentalization in the vacuole proi'ides a mechanism not only for maintaining low Pj concentrations in the cytoplasm (Jennings, 1989;Ashford et al, 1994), but also for maintaining low P, concentrations within the vacuole. As outlined above, vacuolar P, concentrations might well be important in regulating Pj absorption from the external solution.…”

Section: Nutrient Absorptionmentioning

confidence: 99%

“…Strullu et al, 1982;Ashford et aL, 1986). Unlike calciunti po!y-Ps, potassium poiy-Ps are soluble, suggesting that where K* is the counter-ion, poly-P exists in vacuoles in a form suitable for long distance translocation (Ashford et al, 1994). The motile vacuolar system that exists in and between cells of ECM fungal hyphae (Shepherd et aL, 1993 a, 6) might provide a route for poly-P translocation along hyphae (Ashford et al, 1994).…”

Section: Ectomycorrhizal Symbiosismentioning

confidence: 99%

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Physiological heterogeneity within fungal mycelia: an important concept for a functional understanding of the ectomycorrhizal symbiosis

Cairney

Burke²

1996

New Phytologist

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SUMM.ARYIndividual mycelia of filamentous fungi display considerable heterogeneity at the physiological level. Important physiological processes such as nutrient absorption, extracellular enzyme secretion and solute translocation occur differentially within an individual mycelium, and vary according to spatio-temporal changes in patterns of gene expression as the mycelium develops and senesces. In ectomycorrhiza] (ECM) fungi, gene expression appears to be strongly influenced by interaction with the soil environment and the host root. The ECM mycelium is thus a complex and dynamic entity wherein discrete regions display particular physiological attributes. Physiological heterogeneity is important in the overall functioning of the symbiosis. In the particular case of movement of phosphorus from soil to host root in the ECM symbiosis, heterogeneity might provide the driving force for the integrated processes of absorption, translocation and transfer. It is suggested that it is only by considering the sum of the seemingly disparate physiological processes within the heterogeneous mycelium that mycorrhizal functioning can be fully understood.

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Section: Nutrient Absorptionmentioning

confidence: 99%

Section: Nutrient Absorptionmentioning

confidence: 99%

Section: Ectomycorrhizal Symbiosismentioning

confidence: 99%

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Physiological heterogeneity within fungal mycelia: an important concept for a functional understanding of the ectomycorrhizal symbiosis

Cairney

Burke²

1996

New Phytologist

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“…Further transfer of nutrients from the fungus to the host takes place through the symbiotic interface and comprehensive reviews have been given recently [13–15]. Transfer cell structures within ectomycorrhizas have been described [16, 17]. The organization of the Hartig net in mature mycorrhizal roots formed by Amanita muscaria and Picea abies has been studied [16].…”

Section: Introductionmentioning

confidence: 99%

Physiology of organic nitrogen acquisition by ectomycorrhizal fungi and ectomycorrhizas

Chalot¹,

Brun²

1998

FEMS Microbiology Reviews

311

112

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Ectomycorrhizal fungi are symbiotically associated microorganisms which ecological importance has been repeatedly demonstrated. There has been a considerable amount of research aimed at assessing the ability of ectomycorrhizal fungi and ectomycorrhizas to utilize organic nitrogen sources. The fate of soil proteins, peptides and amino acids has been studied from a number of perspectives. Exocellular hydrolytic enzymes have been detected and characterized in a number of ectomycorrhizal and ericoid fungi. Studies on amino acid transport through the plasma membrane have demonstrated the ability of ectomycorrhizal fungi to take up the products of proteolytic activities. Investigations on intracellular metabolism of amino acids have allowed the identification of the metabolic pathways involved. Possible intracellular compartmentation of amino acids will be examined by immunocytochemistry. Further translocation of amino acids in symbiotic tissues has been established by experiments using isotopic tracers, although the exact nature of the nitrogenous compounds transferred at the symbiotic interface remained unclear. One of the main future challenges in the physiology of organic nitrogen acquisition is to determine the nature, the regulation and the location of N-compound transporters at the soil-fungus and fungus-plant interfaces. The molecular approach which is just emerging in this particular research area will greatly improve our knowledge. Future research should also address the extent of competition between different ectomycorrhizal species and between different microbial populations for organic nitrogen.

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“…The isolation method has been used for several decades, and many fungal symbionts have been established as pure cultures from mycorrhizas on a variety of host plants (Harley, 1959;Bj6rkman, 1960;Zak and Bryan, 1963;Zak and Marks, 1964;Lamb and Richards, 1970;Chu-Chou, 1979;Warcup and McGee, 1983;Danielson, 1984;Warcup, 1985;Erland and S6derstrom, 1990;Cairney et al, 1994;Yamada and Katsuya, 1995;Zelmer and Currah, 1995). However, until recently this method has not been popular due to the difficulty of isolating and identifying fungal symbionts (Zak, 1973;Molina and Palmer, 1982;Heinonen-Tanski and Holopainen, 1991 ;Brundrett et al, 1996).…”

mentioning

confidence: 99%

Isolation of Tricholoma matsutake and T. bakamatsutake cultures from field-collected ectomycorrhizas

Yamada¹,

Ogura²,

Degawa

et al. 2001

Mycoscience

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Tricholoma matsutake was isolated into pure cultures from field samples of ectomycorrhizas on Pinus densiflora. The mycorrhizal tips were collected at different times of the year from a colony of T. matsutake in a P. densiflora stand, The mycorrhizal tips were continuously washed with sterilized distilled water and diluted Tween 80 solution, surface-sterilized with calcium hypochlorite solution, and inoculated on several kinds of nutrient agar media, Most of the mycorrhizal tips collected in winter and spring produced colonies that were morphologically similar to cultures of T. matsutake isolated from basidiocarps, The identity of isolates obtained from mycorrhizas was further confirmed to be T. matsutake based on fungal morphology and RFLP patterns of PCR amplified rDNA, The feasibility of T. bakamatsutake isolation into pure culture from ectomycorrhizas on Quercus serrata was also confirmed. These results indicated that mycelium of matsutake mushrooms can be isolated into pure culture from ectomycorrhizas at different times of the year, Mycorrhizas of both T. matsutake and T. bakamatsutake were not observed to have any specific association with soil fungi such as Mortierella spp,

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A basidiomycete isolated from a Pisonia mycorrhiza forms sheathing mycorrhizas with transfer cells on Pisonia grandis R. Br.

Cited by 23 publications

References 11 publications

Physiological heterogeneity within fungal mycelia: an important concept for a functional understanding of the ectomycorrhizal symbiosis

Physiological heterogeneity within fungal mycelia: an important concept for a functional understanding of the ectomycorrhizal symbiosis

Physiology of organic nitrogen acquisition by ectomycorrhizal fungi and ectomycorrhizas

Isolation of Tricholoma matsutake and T. bakamatsutake cultures from field-collected ectomycorrhizas

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