Hebelomas as Mycorrhizal Fungi

Hacskaylo, Edward; Bruchet, G.

doi:10.2307/2484235

Cited by 30 publications

(12 citation statements)

References 3 publications

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“…Unlike R. roseolus, S. punctipes, and the ectendotrophic species, R. ochraceorubens has not yet been shown to form mycorrhizae (E. Hacskaylo, private communication). There is good evidence that 19 of the Hebeloma species are capable of being mycorrhizal (3). Therefore, our data combined with that of others (1, 2) comprise a mixed picture as to the possibility that cytokinin production by the fungus is fundamental in the mycorrhizal relationship.…”

Section: Discussionsupporting

confidence: 69%

Detection and Identification of Cytokinins Produced by Mycorrhizal Fungi

Crafts¹,

Miller²

1974

Plant Physiol.

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Several fungi including six species of the genus Rhizopogon, 22 species of Hebeloma and one of Agaricus have been screened for production of cytokinins. The screening was done by cul turing cytokinin-requiring soybean callus tissue alongside the fungus on a medium lacking a cytokinin supply. Growth of the soybean callus indicated production of cytokinins by the fungus. Of the fungi tested, only R. ochraceorubens A. H. Smith gave off sufficient cytokinin to be detected. Although a number of mycorrhizal species are now known to make and give off cytokinins, an even larger number apparently do not do so under the conditions of screening employed. An unidentified ectendotrophic species definitely gave off trans-zeatin, which has been crystallized, and probably trans-ribosylzeatin. Suillus punctipes (Pk.) Sing. apparently produced the same two cyto. kinins.The growth patterns of roots in mycorrhizal associations with fungi are commonly different from those of unassociated roots.The suspected roles of auxins, cytokinins, and other plant hormones in these growth modifications recently have been discussed and reviewed quite thoroughly by Slankis (18). Reports from this laboratory have emphasized the possible involvement of cytokinins in the mycorrhizal associations. Both zeatin and ribosylzeatin were crystallized from media in which Rhizopogon roseolus (Corda) Hollos had been cultured and the presumed ribonucleotide was detected (10, 11). Additionally, definite evidence for the production of cytokinins by the mycorrhizal fungi Suillus punctipes (Pk.) Sing., S. cothernatus Sing., Amanita rubescens (Pers. ex Fr.) S. F. Gray, and an unidentified ectendotrophic species was presented (13). We now offer evidence for the identity of cytokinins produced by S. punctipes and the ectendotrophic species and extend the list of species tested for hormone production.

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Section: Discussionsupporting

confidence: 69%

Detection and Identification of Cytokinins Produced by Mycorrhizal Fungi

Crafts¹,

Miller²

1974

Plant Physiol.

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“…Most of the ectomycorrhizal fungi do not usually fruit in pure culture or even when cultivated in the presence of the host plant. Of those showing a tendency to fruit, most belong to the genus Hebeloma (Hacskaylo & Bruchet, 1972;Bruchet, 1973;Debaud, Pepin & Bruchet, 1981a, b) or to the Boletaceae (Modess, 1941;Pantidou, 1961Pantidou, , 1962Pantidou, , 1964MacLaughlin, 1964MacLaughlin, , 1970. Some of the boletes associated with birch formed primordia and immature fruit bodies in pure culture.…”

Section: Introductionmentioning

confidence: 99%

IN VITRO FRUITING UNDER CONTROLLED CONDITIONS OF THE ECTOMYCORRHIZAL FUNGUS HEBELOMA CYLINDROSPORUM ASSOCIATED WITH PINUS PINASTER

Debaud

1987

New Phytologist

112

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SUMMARYThe ectomycorrhizal fungus Hebeloma cylindrosporum Romagnesi produced sporulating fruit bodies under axenic conditions on a synthetic medium when cultivated with its usual host plant Pinus pinaster (Sol.). In the absence of the host plant, H. cylindrosporum only formed primordia or immature fruit bodies. In 1 1 Erlenmeyer flasks, the fungal fruiting started about one and half months after the inoculation of one-month-old P. pinaster plants by the mycelium of H. cylindrosporum, and a total of 144 fruit bodies appeared in 45 flasks during a 9-5-month fruiting period. At 18 °C, the mean number of basidiomes developed per flask was about 3 5. A thermal shock of + 6 °C for 5 d did not signiflcantly affect the mean number of basidiomes per flask but modified the time course of their rate of formation. Spores were collected from the fruit bodies and were found to be capable of germinating.

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“…, 10, 17~, 15, 34, 36, 38, 42 h, 48, 53, 56, 57, 58, 62, 65, 6fj, 68; B =02, 10, 23, 37, 38, 62, 65; C=37, 58, (59, 70 A--16, 17,, 62 Alvarez and Cobb (1977) 7 Ammirati et al (1987) 8 Bi et al (1987) 9 Bills (1986a) 10 Bills et al (1986) 11 Bills and Miller (1987) 12 Brunner and Horak (1988) 13 Bryan and Zak (1961) 14 Cotter (1987) 15 Croghan (1984) 16 Danielson (1984) 17 Danielson et al (1985) 18 Dighton (1983) 19 Doak (1934) 20 Ekwebelam (1973) 21 Froidevaux (1975) 22 Froidevaux and Amiet (1975) 23 Godbout and Fortin (1983) 24 Godbout and Fortin (1985) 25 Hacskaylo (1951) 26 Hacskaylo and Bruchet (1972) 27 Hacskaylo and Palmer (1955) 28 Hacskaylo and Vozzo (1967) 29 Harvey et al (1976) 30 Hatch and Hatch (1933) 31 Homola and Mistretta (1977) 32 Jacobson (1990) 33 Krangauz (1955) 34 Kropp and Trappe (1982) 35 Largent et al (1980) 36 Lee et al (1987) 37 Leon and Guzman (1980) 38 Maas and Stuntz (1969) 39 Marx and Davey (1969) 40 McAfee and Fortin (1986) 41 McArdle (1932) 42 Mejstrik (1973) 43 Melin (1923) 44 Melin (1924) 45 Melin (1925a) 46 Melin (1925b...…”

Section: Lactarius Corrugismentioning

confidence: 99%

“…The number of fungi that have been associated with the ectomycorrhizae of Virginia pine has increased since Trappe's 1962 survey (Bills 1986b(Bills , c, 1989Bills and Miller 1984;Hacskaylo 1965;Hacskaylo and Bruchet 1972;Marx and Bryan 1970;Miller et al 1986;Schramm 1966;Stankis 1984), as has the number associated with pitch pine (Berry 1982;Bills 1986cBills , 1989Lee 1984;Marx and Bryan 1970;Schramm 1966;Stankis 1984;Tullose 1984). However, except for the report of Stankis (1984), little new information has been recorded for Table Mountain pine, which is endemic in the Appalachian Mountains with limited distribution elsewhere (Zobel 1969).…”

Section: Introductionmentioning

confidence: 99%

Fruiting of ectomycorrhizal basidiomycetes on unburned and prescribed burned hard-pine/hardwood plots after drought-breaking rainfalls on the Allegheny Mountains of southwestern Virginia

1994

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Abstract.A headfire upward along the crest to the peak of a foothill during February 1988 had been prescribed to lower the possibility of a wildfire during the dry season on the Jefferson National Forest. Some surface litter plus annual and perennial stems on one-half of a stand of Pinus pungens/P, rigida had been destroyed. Subsequent development of ectomycorrhizal sporophores of basidiomycetes was recorded regularly within equal areas of burned and unburned portions and within a nearby unburned stand of P. virginiana.Each plot had a few ectomycorrhizal hardwoods, mainly Quercus spp. First fruiting was noted under burned P. pungens 3 weeks after a general rain in mid-July and after 4 weeks under both. By the end of November, when fruiting ceased, 138 separable taxa had been collected of which 95 had been identified. A list of the fungi and data on current and previously reported host associations, occurrence on each of the substrates, times and frequencies of fruiting, periodicity of genera, and variations in weather conditions are presented.

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Hebelomas as Mycorrhizal Fungi

Cited by 30 publications

References 3 publications

Detection and Identification of Cytokinins Produced by Mycorrhizal Fungi

Detection and Identification of Cytokinins Produced by Mycorrhizal Fungi

IN VITRO FRUITING UNDER CONTROLLED CONDITIONS OF THE ECTOMYCORRHIZAL FUNGUS HEBELOMA CYLINDROSPORUM ASSOCIATED WITH PINUS PINASTER

Fruiting of ectomycorrhizal basidiomycetes on unburned and prescribed burned hard-pine/hardwood plots after drought-breaking rainfalls on the Allegheny Mountains of southwestern Virginia

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