Interspecific Transfer of Ca‐45 and P‐32 by Root Systems

Woods, Frank W.; Brock, Kirby

doi:10.2307/1934943

Cited by 45 publications

(13 citation statements)

References 8 publications

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“…Such transfer could involve two live plants but may also occur between senescent and live roots of the same plant, different plants of the same species, or plants of different species. Woods and Brock (1964) injected tree stumps with radioactive Ca and P and recovered isotope in nearby vegetation, but this experiment is open to considerable criticism since dying roots attached to the tree stumps would certainly release isotope into the soil, where it could be picked up by the soil mycelium in the normal way. More recently, Read et al (1979) claimed to have demonstrated transfer of 32p between Plantago and Festuca spp.…”

Section: Competition Between Species In Mixed Communitiesmentioning

confidence: 99%

Ecology of Mycorrhizae and Mycorrhizal Fungi

Mosse

Stribley

LeTacon³

1981

Advances in Microbial Ecology

225

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Section: Competition Between Species In Mixed Communitiesmentioning

confidence: 99%

Ecology of Mycorrhizae and Mycorrhizal Fungi

Mosse

Stribley

LeTacon³

1981

Advances in Microbial Ecology

225

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“…These constellations of hyphal bridges among root systems have been suggested to be pathways for inter-plant movement of fixed-carbon by both ECM [21] and AM [22] fungi, mineral nutrients such as nitrogen [23], [24] and phosphorus [25], [26] by both types of mycorrhizal fungi, and water, the latter especially by ECM networks [27].…”

Section: Introductionmentioning

confidence: 99%

Arbuscular-Mycorrhizal Networks Inhibit Eucalyptus tetrodonta Seedlings in Rain Forest Soil Microcosms

et al. 2013

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Eucalyptus tetrodonta, a co-dominant tree species of tropical, northern Australian savannas, does not invade adjacent monsoon rain forest unless the forest is burnt intensely. Such facilitation by fire of seedling establishment is known as the "ashbed effect." Because the ashbed effect might involve disruption of common mycorrhizal networks, we hypothesized that in the absence of fire, intact rain forest arbuscular mycorrhizal (AM) networks inhibit E. tetrodonta seedlings. Although arbuscular mycorrhizas predominate in the rain forest, common tree species of the northern Australian savannas (including adult E. tetrodonta) host ectomycorrhizas. To test our hypothesis, we grew E. tetrodonta and Ceiba pentandra (an AM-responsive species used to confirm treatments) separately in microcosms of ambient or methyl-bromide fumigated rain forest soil with or without severing potential mycorrhizal fungus connections to an AM nurse plant, Litsea glutinosa. As expected, C. pentandra formed mycorrhizas in all treatments but had the most root colonization and grew fastest in ambient soil. E. tetrodonta seedlings also formed AM in all treatments, but severing hyphae in fumigated soil produced the least colonization and the best growth. Three of ten E. tetrodonta seedlings in ambient soil with intact network hyphae died. Because foliar chlorosis was symptomatic of iron deficiency, after 130 days we began to fertilize half the E. tetrodonta seedlings in ambient soil with an iron solution. Iron fertilization completely remedied chlorosis and stimulated leaf growth. Our microcosm results suggest that in intact rain forest, common AM networks mediate belowground competition and AM fungi may exacerbate iron deficiency, thereby enhancing resistance to E. tetrodonta invasion. Common AM networks–previously unrecognized as contributors to the ashbed effect–probably help to maintain the rain forest–savanna boundary.

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“…These linkages allow for carbon and nutrient transfer between tree species and could play an important role in ameliorating light competition and sharing scarce resources (Woods and Brock 1964;Finlay and Read 1986;Perry et al 1989;Simard et al 1997a). These linkages allow for carbon and nutrient transfer between tree species and could play an important role in ameliorating light competition and sharing scarce resources (Woods and Brock 1964;Finlay and Read 1986;Perry et al 1989;Simard et al 1997a).…”

Section: Introductionmentioning

confidence: 99%

A comparison of ectomycorrhiza communities from three conifer species planted on forest gap edges

Kranabetter¹,

Hayden²,

Wright³

1999

Can. J. Bot.

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We examined the ectomycorrhiza communities on lodgepole pine (Pinus contorta var. latifolia Engelm), white spruce (Picea glauca (Moench) Voss), and subalpine fir (Abies lasiocarpa (Hook.) Nutt) seedlings planted together on mature-forest edges in northwestern British Columbia. We examined 32 seedlings of each tree species, grouped by pairs along the north and south edges of eight gaps. We found 74 morphotypes in total, with an average of 52 morphotypes per tree species. Morphotypes with emanating hyphae or strands made up 60% of the overall ectomycorrhiza community. Multihost fungi averaged almost 60% of total morphotypes in species comparisons, although some of the multihost fungi appeared to have tree host preferences. The average community similarity, based on morphotype abundance, was 52% between conifer species, and 37% for morphotypes with emanating hyphae or strands. Within planted groups, between seedlings 1-2 m apart, community similarity ranged from 2 to 40% for morphotypes with emanating hyphae or strands. In mature, mixed forests, the infrequent occurrence of many multihost ectomycorrhizae created a wide range in the probability of hyphal linkages between neighboring seedlings.Résumé : Les auters ont examiné les communautés ectomycorhiziennes du pin lodgepole (Pinus contorta var. latifolia Engelm.) de l'épinette blanche (Picea glauca (Moench) Voss), et de sapin subalpin (Abies lasiocarpa (Hook.) Nutt) sur des semis plantés ensemble, à l'orée de forêts matures, dans le nord-ouest de la Colombie britannique. Ils ont examiné 32 plantules de chacune des trois espèces, groupées en paires, au nord et au sud de huit clairières. Ils ont trouvé 78 morphotypes entout, avec une moyenne de 52 morphotypes par espèce d'arbre. Les morphotypes munis d'hyphes irradiantes et de cordons mycéliens constituent 60% de l'ensemble de la communauté ectomycorhizienne. Les champignons à hôtes multiples comptent en moyenne pour presque 60% du total des morphotypes en comparant les espèces, bien que certains des champignongs à hôtes multiple semblent avoir une essence préférée. La similarité moyenne des communautés, basée sur l'abondance des morphotypes, est de 53% entre les espèces confériennes, et 37% pour les morphotypes munis d'hyphes irradiantes et de cordons mycéliens. À l'intérieur des groupes plantés, 1-2 m entre les plantules, la similarité des communautés va de 2-40% pour les morphotypes avec hyphes irradiaantes et cordons mycéliens. Dans les forêts mixtes immatures, la rare occurrence d'ectomycorhizes à hôtes multiples crée une grande amplitude dans la probabilité de continuité mycélienne entre des plantules voisines.

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Interspecific Transfer of Ca‐45 and P‐32 by Root Systems

Cited by 45 publications

References 8 publications

Ecology of Mycorrhizae and Mycorrhizal Fungi

Ecology of Mycorrhizae and Mycorrhizal Fungi

Arbuscular-Mycorrhizal Networks Inhibit Eucalyptus tetrodonta Seedlings in Rain Forest Soil Microcosms

A comparison of ectomycorrhiza communities from three conifer species planted on forest gap edges

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