Influence of propagating soil on the mycorrhizal succession of birch seedlings transplanted to a field site

Fleming, L. V.; Deacon, J.W.; Last, F. T.; Donaldson, S. J.

doi:10.1016/s0007-1536(84)80111-4

Cited by 40 publications

(10 citation statements)

References 6 publications

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“…One model of ectomycorrhizal fungus succession is derived from studies at the Institute of Terrestrial Ecology in Scotland (Deacon et al 1983;Dighton et al 1986;Fleming 1983;Fleming et al 1984Fleming et al , 1986Last et al 1987;Mason et al 1982Mason et al , 1983. This model suggests that early ectomycorrhizal communities are composed of a narrow selection of non-host-specific (early stage) fungi which colonize young seedlings or younger regions of the root systems (Deacon and Fleming 1992).…”

Section: Introductionmentioning

confidence: 99%

Occurrence of ectomycorrhizal fungi on the forefront of retreating Lyman Glacier (Washington, USA) in relation to time since deglaciation

2002

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Glacier forefronts provide a unique system for studying primary succession of plants and fungi. We constructed a chronosequence of ectomycorrhizal fungus occurrence on the forefront of Lyman Glacier in the North Cascades mountain range in Washington, USA. The plant communities established on non-vegetated substrate as patchily distributed plant individuals and developed towards complex vegetation with a variety of ectomycorrhizal hosts, including Salix commutata, S. phylicifolia, Abies lasiocarpa, Larix lyallii, Pinus contorta, Tsuga mertensiana and additional infrequent taxa. A most probable number assay of non-vegetated substrates over the chronosequence indicated that ectomycorrhizal propagules were few or absent in the non-vegetated areas adjacent to the glacier terminus but increased with time since deglaciation. Ectomycorrhizal fungus sporocarps occurred as soon as the first host plants of substantial size were present. However, none were observed with the most recently established hosts--small A. lasiocarpa seedlings. Only four species (Cortinarius decipiens, C. tenebricus, Inocybe lacera, and Laccaria cf. montana) occurred on substrate deglaciated for less than 40 years. Three of these species (C. tenebricus, I. lacera, and L. cf. montana) occurred along the chronosequence to the terminal moraine on substrate deglaciated for 70-100 years. An additional five species (one unidentified species each of Cortinarius and Lactarius, Cortinarius mutabilis, Lactarius uvidus var. montanus, and Suillus cavipes) occurred only on the oldest substrate. Our results support the current "early- and late-stage" model of ectomycorrhizal fungus succession in that additional species enter the community over time. However, we hypothesize that diversification of the mycorrhizal fungus community in this primary successional habitat resulted from an increasing diversity of host plants along with changing habitat attributes.

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Section: Introductionmentioning

confidence: 99%

Occurrence of ectomycorrhizal fungi on the forefront of retreating Lyman Glacier (Washington, USA) in relation to time since deglaciation

2002

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“…This species is consequently frequently found, but not exclusively, in forest stands developing on sand dunes along the Atlantic or even the Mediterranean coast (Contu, 1991). In this respect, H. cylindrosporum can be qualified, as many other Hebeloma species (Last et al ., 1983; Fleming et al ., 1984), as a pioneer species, which thrives in newly established forests where humus accumulation is low, or in disturbed habitats (Guidot et al ., 2002b). In South‐West France, along the Atlantic coast, fruit bodies of H. cylindrosporum form late in the autumn, usually between mid‐October and early December (Gryta et al ., 1997).…”

Section: Taxonomy Distribution Autecology and Host Range Of Hmentioning

confidence: 99%

Hebeloma cylindrosporum– a model species to study ectomycorrhizal symbiosis from gene to ecosystem

et al. 2004

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Contents Summary 481 Introduction 482 Taxonomy, distribution, autecology, and host range of H. cylindrosporum 482 The Hebeloma cylindrosporum toolbox 483 Mycorrhiza differentiation 486 Nutritional interactions 488 Genetic diversity and dynamics of H. cylindrosporum populations in P. pinaster forest ecosystems 491 Future directions 494 Acknowledgements 494 References 494 Summary The basidiomycete Hebeloma cylindrosporum has been extensively studied with respect to mycorrhiza differentiation and metabolism and also to population dynamics. Its life cycle can be reproduced in vitro and it can be genetically transformed. Combined biochemical, cytological, genetical and molecular approaches led to the characterisation of mutant strains affected in mycorrhiza formation. These studies demonstrated the role of fungal auxin as a signal molecule in mycorrhiza formation and should allow the characterisation of essential fungal genes necessary to achieve a compatible symbiotic interaction. Random sequencing of cDNAs has identified numerous key functional genes which allowed dissection of essential nitrogen assimilation pathways. H. cylindrosporum also proved to be a remarkable model species to uncover the dynamics of natural populations of ectomycorrhizal fungi and the way in which they respond and adapt to anthropogenic disturbance of the forest ecosystem. Although studies on mycorrhiza differentiation and functioning and those on the population dynamics of H. cylindrosporum have been carried out independently, they are likely to converge in a renewed molecular ecophysiology which will envisage how ectomycorrhizal symbiosis functions under varying field conditions.

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“…by photosynthate from a linked more compatible host. Massicotte et al (1994) drew a comparison with mycorrhizal succession on Betula pendula Roth (e.g., Fleming 1983;Fleming et al 1984), where late-stage fungi, such as Lactarius and Tuber, formed EM with birch seedlings grown either in mycorrhizal soil (i.e., soil from immediately beneath a birch tree) in the greenhouse or with access to roots of mature birch trees in the field. Conversely, early-stage fungi, such as Thelephora and Hebeloma, formed EM with birch seedlings grown either in nonmycorrhizal soil (i.e., soil taken far away from a birch tree) or in isolation from mature birch trees in the field.…”

Section: Effect Of Mixturementioning

confidence: 99%

Shared compatibility of ectomycorrhizae on Pseudotsuga menziesii and Betula papyrifera seedlings grown in mixture in soils from southern British Columbia

Simard¹,

Molina²,

Smith³

et al. 1997

Can. J. For. Res.

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Seedlings of Pseudotsuga menziesii (Mirb.) Franco and Betula papyrifera Marsh. were grown in the greenhouse in monoculture and dual culture in soils collected from a young mixed species plantation in the southern interior of British Columbia. The objectives of the study were (i) to evaluate the ability of P. menziesii and B. papyrifera to share compatible ectomycorrhizal fungi in order to assess their potential for hyphal linkages and (ii) to study the influence of neighboring seedlings on ectomycorrhizae occurrence. Eleven ectomycorrhizal morphotypes were recognized, seven of which P. menziesii and B. papyrifera seedlings shared in common over 90% of their root tips. The abundance and frequency of Rhizopogon, E-strain I, and Tuber on P. menziesii, and the frequency of Lactarius, Hebeloma, and Cenococcum on B. papyrifera, were affected by the presence of a neighboring seedling. The number of ectomycorrhizal morphotypes shared in common and colonization of root tips by common types were slightly greater when P. menziesii and B. papyrifera were grown in dual culture rather than in monoculture.Résumé : Des semis de Pseudotsuga menziesii (Mirb.) Franco et de Betula papyrifera Marsh. ont été cultivés en serres, en monoculture ou en culture mixte, dans du sol prélevé dans une jeune plantation d'espèces mixtes dans le sud de la zone continentale en Colombie-Britannique. Cette étude avait pour objectifs (i) d'évaluer la capacité de P. menziesii et de B. papyrifera de partager des champignons ectomycorhiziens compatibles dans le but d'évaluer la possibilité qu'ils forment des liens fongiques et (ii) d'étudier l'influence des semis avoisinants sur l'occurence des ectomycorhizes. Onze types morphologiques furent identifiés dont sept que les semis de P. menziesii et de B. papyrifera partageaient sur plus de 90% de leurs extrémités racinaires. L'abondance et la fréquence de Rhizopogon, de la race E 1 et de Tuber sur P. menziesii et de Lactarius, Hebeloma et Cenococcum sur B. papyrifera étaient affectées par la présence d'un semis avoisinant. Le nombre de types morphologiques partagés et la colonisation des extrémités racinaires par les types les plus répandus étaient légèrement plus élevés lorsque P. menziesii et B. papyrifera étaient cultivés en culture mixte qu'en monoculture. [Traduit par la Rédaction]

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Influence of propagating soil on the mycorrhizal succession of birch seedlings transplanted to a field site

Cited by 40 publications

References 6 publications

Occurrence of ectomycorrhizal fungi on the forefront of retreating Lyman Glacier (Washington, USA) in relation to time since deglaciation

Occurrence of ectomycorrhizal fungi on the forefront of retreating Lyman Glacier (Washington, USA) in relation to time since deglaciation

Hebeloma cylindrosporum– a model species to study ectomycorrhizal symbiosis from gene to ecosystem

Shared compatibility of ectomycorrhizae on Pseudotsuga menziesii and Betula papyrifera seedlings grown in mixture in soils from southern British Columbia

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