Comparative effects of the soil microflora on ectomycorrhizal inoculation of conifer seedlings

McAfee, B. J.; Fortin, J. A.

doi:10.1111/j.1469-8137.1988.tb04185.x

Cited by 32 publications

(14 citation statements)

References 22 publications

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“…This fungus is well adapted to disturbed sites and enhances the reestablishment of plants, but only in areas where other fungi are absent (McAfee and Fortin 1988). P. tinctorius has been used for inoculation of seedlings in reforestation projects, but these experiments were not always successful (Castellano 1996).…”

Section: Discussionmentioning

confidence: 99%

Post-fire, seasonal and annual dynamics of the ectomycorrhizal community in a Quercus ilex L. forest over a 3-year period

Román

Miguel

2005

Mycorrhiza

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Two study plots, burned and control, were established in autumn 1998 in a Quercus ilex forest located in northern Spain, part of which had been affected by a low intensity fire in 1994. Soil samples for ectomycorrhizae (ECM) were taken over a 3-year period in each study plot in spring, summer, autumn and winter. ECM morphotypes were identified and the relative abundance of each morphotype in each soil sample calculated, along with species richness, Shannon diversity index and percentage of mycorrhization in each soil sample. The relative abundance of certain ECM morphotypes differed between burned and control plots, and the percentage of mycorrhizal tips was significantly lower in the burned than in the control plot. Nevertheless, there were no significant differences in the diversity, species richness or species composition of the ECM community in the burned and control plots. The dominant ECM morphotypes in both stands were Cenococcum geophilum and several thelephoroid fungi. Sphaerosporella brunnea and Pisolithus tinctorius thrived especially in the burned plot, whereas three ectomycorrhizal morphotypes assigned to the genus Hebeloma were especially abundant in the control plot. There was no significant variation in the relative abundance of the ECM morphotypes between seasons, but ECM community species richness was highest in autumn and lowest in summer. The percentage of mycorrhizal tips reached a maximum in winter, with its minimum in autumn. Collection of samples over the 3-year period also enabled us to detect a significant increase in percentage of ECM colonisation in the burned stand over time.

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Section: Discussionmentioning

confidence: 99%

Post-fire, seasonal and annual dynamics of the ectomycorrhizal community in a Quercus ilex L. forest over a 3-year period

Román

Miguel

2005

Mycorrhiza

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“…Other facvide further information on fungal-root physiology interactors such as the absence of associated microflora, nutrient tions during water stress. An understanding of the mechanisms levels, temperature, soil pH, fungal growth factors, and plant determining intraspecific variability in mycelial strand forroot exudates also affect development of the extramatrical mation, extension of the extramatrical phase, and physiologphase (Bethelenfalvay et al 1988;Coutts and Nicoll 1990; ical response to adverse stress could advance our kncwledge Erland et al 1990;Garbaye and Bowen 1987;McAffee and and enable us to apply biotechnology to reforestation. Fortin 1988; Slankis 1974).…”

Section: Recent Research Conducted Bymentioning

confidence: 98%

Genetic variations of ectomycorrhizal fungi: extramatrical phase of Pisolithus sp.

Lamhamedi¹,

Fortin²

1991

Can. J. Bot.

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LAMHAMEDI, M. S., and FOKTIN, J. A. 1991. Genetic variations of ectomycorrhizal fungi: extramatrical phase of Pisolirhus sp. Can. J . Bot. 69: 1927Bot. 69: -1934. The ability of 28 monokaryons and 78 reconstituted dikaryons of Pisolirhus sp. from South Africa to form rnycelial strands in association with Pinus pinusrer was tested under aseptic and non-aseptic conditions. All monokaryotic and some dikaryotic cultures failed to form mycelial strands either on agar medium or in growth pouches. The remaining dikaryotic cultures showed wide genetic variation in the development of mycelial strands and in the extension of their extrarnatrical phase. The exploration of the surrounding environment by the extramatrical phase from synthesized Pirzus pirzuster -dikaryotic cultures of the Pisolittzl~s sp. depended largely upon the type of medium used, being more extensive in soil than on nutrient agar medium. Microscopic observation showed that mycelial strands were formed by aggregations of hyphae. Large central hyphae with disorganized cytoplasm were observed in some strands. The results are discussed in relation to nutrient and water absorption.Key \vords: Pisolitlzus sp., Pirzus pi~zaster, genetic, extramatrical phase, mycelial strands. LAMHAMEDI, M. S., et FORTIN, J . A. 1991. Genetic variations of ectomycorrhizal fungi: extramatrical phase of Pisolitlzus sp. Can. J. Bot. 69 : 1927-1934. La capacite de 28 monocaryons et de 78 dicaryons provenant d'Afrique du Sud de former des cordons rnycCliens a Ct C testCe sous des conditions steriles et non stkriles. Tous les monokaryons et certains dikaryons n'ont pas form6 des cordons myceliens en milieu gtlosC et en sachet de croissance. Le reste des cultures dikaryotiques ont montrC une large variabilitk g6nCtique quant au developpement des cordons myckliens et i I'extension de la phase extramatricielle. L'exploration de la phase extrarnatricielle, issue de I'association symbiotique Pirzus pirzusrer-dikaryons de Pisolirhus sp. depend du milieu environnant et a Ctd plus extensive sur le sol que sur le milieu nutritif gdosk. Les observations microscopiques ont lnontre que les cordons mycCliens sont formes par des aggregations d'hyphes. Les cytoplasmes dCsorganisCs ont CtC observes chez les larges hyphcs centraux. Les resultats sont discutCs en relation avec I'absorption de I'eau et des ClCrnents nutritifs.

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“…'Mee and Fortin (1988) wilh tamarack, where seedlings inoculated vviih P. tinctorius formed mycorrhizae (57%) under aseptic conditiotis. Although, in similar condition;., inoculation with H. cytindrosporutn showed extensive mycelial deveioptiicnt on the root system, only a few short roots (8?…”

Section: Discussiotimentioning

confidence: 99%

Controlled mycorrhizal initiation as a means to improve root development in somatic embryo plantlets of hybrid larch (Larix x eurolepis)

Piola¹,

Rohr²,

Aderkas³

1995

Physiol Plant

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Controlled mycorrhizal initiation as a means to improve root development in somatic embryo plantlets of hybrid larch {Larix X eurolepis) ¥. Piola, R. Rohr and P. von Aderkas Piola, F., Rohr, R. and von Aderkas, P. 1995. Controlled mycorrhizal initiation as a means to improve root development in somatic embryo plantlets of hybrid larch (Larix x eurolepis). -Physioi. Plant. 95: 575-580.This study represents the first report of in vitro myconhization of somatic embrj'O-derived plantlets. Effects of fungi on the rooting of plantlets as well as on their ultrastruaure were studied. Embryo-de rived plantlets of a hybrid larch (Larix x eurolepis Henry) were grown aseptically in the presence of four ectomycorrhizal ftingi. One montfi after inoculation with Laccaria laccata, Hebeloma cylindrosporum and Pisolithus tinctorius, the number of plantlets which had developed a well-growing root system was significantly improved compared with controls. Furthertnore, root branching was strongly stimulated by L. laccata and Ft. cylindrosporum, which were more efficient species than P. tinctorius and Suiilus grevillei. Development of the root system was concomitantly accompanied by an enhancement of shoot growth, except for plantlets inoculated with S. greviliei. which died after three to six months. At the ultrastructural level, cross-sections of lateral roots made six months after inoculation, showed the presence of a Hardg net in the case of L. laccata and H cylindrosporum, whereas no such net was observed with the two other fungi. With 5. greviliei, some perforating hyphae penetrated the cortical cells and resulted in cell death. Evidence of a relationship between structure and efficiency of the association was found.

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Comparative effects of the soil microflora on ectomycorrhizal inoculation of conifer seedlings

Cited by 32 publications

References 22 publications

Post-fire, seasonal and annual dynamics of the ectomycorrhizal community in a Quercus ilex L. forest over a 3-year period

Post-fire, seasonal and annual dynamics of the ectomycorrhizal community in a Quercus ilex L. forest over a 3-year period

Genetic variations of ectomycorrhizal fungi: extramatrical phase of Pisolithus sp.

Controlled mycorrhizal initiation as a means to improve root development in somatic embryo plantlets of hybrid larch (Larix x eurolepis)

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