Intra- and interspecific variation in patterns of organic and inorganic nitrogen utilization by three Australian Pisolithus species

Anderson, Ian C.; Chambers, Susan M.; Cairney, John

doi:10.1017/s0953756299008813

Cited by 46 publications

(22 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Despite the reported variation in amino acid preference, there was no consistent pattern in amino acid preference that separated the epacrid endophytes from H. ericae (Whittaker & Cairney, 2001). By contrast to the W. pungens endophytes, isolates of the ectomycorrhizal genus Pisolithus from a similar dry sclerophyll forest habitat were found by Anderson et al . (1999) to use the basic amino acids arginine and histidine very poorly.…”

Section: Epacrid Plant Hostsmentioning

confidence: 64%

Biology of mycorrhizal associations of epacrids (Ericaceae)

Cairney

Ashford

2002

New Phytologist

View full text Add to dashboard Cite

SummaryEpacrids, a group of southern hemisphere plants formerly considered members of the separate family Epacridaceae, are in fact most closely allied to the Vaccinioid tribe (Ericaceae). Epacrids and other extant ericoid mycorrhiza-forming plants appear to have a monophyletic origin. In common with many Ericaceae they form ericoid mycorrhizas. ITS sequence data indicate that the fungi forming ericoid mycorrhizas with epacrids and other extant Ericaceae are broadly similar, belonging to a poorly defined group of ascomycetes with phylogenetic affinities to Helotiales. The basic development and structure of ericoid mycorrhizal infections in epacrids is similar to other Ericaceae. However, data are limited on the structure and physiology of both hair roots and ericoid mycorrhizas for all Ericaceae. Relatively little is known about the functional significance of ericoid mycorrhizas in epacrids in southern hemisphere habitats that are often poor in organic matter accumulation. However the abilities of fungal endophytes of epacrids to utilize organic N and P substrates equal those of endophytes from northern hemisphere heathland plant hosts. Investigations using 15 N/ 13 C-labelled organic N substrates suggest that mycorrhizal endophytes are important, at least, to the N nutrition of their epacrid hosts in some habitats.© New Phytologist (2002) 154: 305 -326

show abstract

Section: Epacrid Plant Hostsmentioning

confidence: 64%

Biology of mycorrhizal associations of epacrids (Ericaceae)

Cairney

Ashford

2002

New Phytologist

View full text Add to dashboard Cite

show abstract

“…In those ECM fungi that have been successfully cultured, the ability to use ammonium ( ) is a universal trait (Smith & Read, 1997). The use of nitrate as an N source has so far only been examined in a small number of ECM fungi and the results suggest that utilization is very variable, both between and within species (France & Reid, 1984;Ho & Trappe, 1987;Anderson et al, 1999). A few ECM species (e.g.…”

Section: Introductionmentioning

confidence: 99%

Growth on nitrate and occurrence of nitrate reductase‐encoding genes in a phylogenetically diverse range of ectomycorrhizal fungi

et al. 2008

View full text Add to dashboard Cite

Summary• Ectomycorrhizal (ECM) fungi are often considered to be most prevalent under conditions where organic sources of N predominate. However, ECM fungi are increasingly exposed to nitrate from anthropogenic sources. Currently, the ability of ECM fungi to metabolize this nitrate is poorly understood.• Here, growth was examined among 106 isolates, representing 68 species, of ECM fungi on nitrate as the sole N source. In addition, the occurrence of genes coding for the nitrate reductase enzyme (nar gene) in a broad range of ectomycorrhizal fungi was investigated.• All isolates grew on nitrate, but there was a strong taxonomic signature in the biomass production, with the Russulaceae and Amanita showing the lowest growth. Thirty-five partial nar sequences were obtained from 43 tested strains comprising 31 species and 10 genera. These taxa represent three out of the four clades of the Agaricales within which ECM fungi occur. No nar sequences were recovered from the Russulaceae and Amanita, but Southern hybridization showed that the genes were present.• The results demonstrate that the ability to utilize nitrate as an N source is widespread in ECM fungi, even in those fungi from boreal forests where the supply of nitrate may be very low.

show abstract

“…It has been shown that some ectomycorrhizal (ECM) fungi associated with boreal tree species can readily utilise a wide range of amino acids (Finlay et al 1992;Keller 1996;Dickie et al 1998). Some ECM species can also grow on more complex organic N sources, including proteins (Lundeberg 1970;Abuzinadah and Read 1986a, b;Leake and Read 1989;Finlay et al 1992;Keller 1996;Anderson et al 1999) and chitin (Leake and Read 1990). The ability of ECM fungi to utilise protein as an N source has received special attention and the classification of fungi according to their ability to grow on a protein (bovine serum albumin, BSA) compared with ammonium has been proposed (Abuzinadah and Read 1986c).…”

Section: Introductionmentioning

confidence: 99%

Use of different nitrogen sources by the edible ectomycorrhizal mushroom Cantharellus cibarius

2002

View full text Add to dashboard Cite

The growth of three strains of Cantharellus cibarius on liquid media containing ammonium, nitrate and bovine serum albumin (BSA) in different combinations was determined. The most readily utilisable source of N was ammonium. BSA utilisation was limited compared with media containing ammonium. Growth on nitrate was also poor, suggesting a limited capacity of C. cibarius to metabolise this nitrogen source. There was some indication of considerable intraspecific variation within C. cibarius in the utilisation of nitrogen sources. Possible links between atmospheric nitrogen deposition and the observed decrease of sporocarp formation by C. cibarius in Europe are discussed. We highlight the potential ecological significance of bacteria associated with C. cibarius which may circumvent the need for fungal extracellular enzymes to access complex nitrogen sources.

show abstract

Intra- and interspecific variation in patterns of organic and inorganic nitrogen utilization by three Australian Pisolithus species

Cited by 46 publications

References 43 publications

Biology of mycorrhizal associations of epacrids (Ericaceae)

Biology of mycorrhizal associations of epacrids (Ericaceae)

Growth on nitrate and occurrence of nitrate reductase‐encoding genes in a phylogenetically diverse range of ectomycorrhizal fungi

Use of different nitrogen sources by the edible ectomycorrhizal mushroom Cantharellus cibarius

Contact Info

Product

Resources

About