Variation in propagule numbers of vesicular-arbuscular mycorrhizal fungi in a semi-arid soil

McGee, Peter

doi:10.1016/s0953-7562(89)80092-9

Cited by 95 publications

(61 citation statements)

References 33 publications

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“…6-7 (Plenchette et al, 1989), or >11 in a fallowed plot of the long term experiment of Deherain (INRA, Research Center of Versailles, France) (Plenchette, 1989). Since the number of spores is rather high one could have expected higher soil infectivity, but this can be explained by observations which show that there are only very low numbers of viable spores in soils of disturbed ecosystems (Brundrett and Abbott, 1994;Diop et al, 1994;McGee, 1989). The results obtained in our study do not provide evidence for a beneficial effect of increased duration of fallow on mycorrhizal soil infectivity, but they clearly demonstrate the benefit of protecting the fallow from grazing during reestablishment of vegetation.…”

Section: Discussioncontrasting

confidence: 60%

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The mycorrhizal soil infectivity and arbuscular mycorrhizal fungal spore communities in soils of different aged fallows in Senegal

Duponnois

Plenchette

Thioulouse

et al. 2001

Applied Soil Ecology

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This work was carried out to determine the influence of the duration of fallow and of physico-chemical components of soils on the distribution of endomycorrhizal fungal spores and the mycorrhizal soil infectivity. The mycorrhization of indigenous plants from the fallows was examined and it was concluded that, except for Cassia obtusifolia, fungal colonization was poorly developed. No correlation was established between spore populations and duration of fallow or between grazed and fenced areas. The relationships between abundance of mycorrhizal spores and the physico-chemical characteristics of the soils were markedly variable among species of mycorrhizal fungi. The results did not provide evidence of a beneficial effect of increased length of fallowing on mycorrhizal soil infectivity, but they did demonstrated the positive effect of preventing grazing on the re-establishment of vegetation during the fallow period.

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Section: Discussioncontrasting

confidence: 60%

“…Soil disturbance by grazing or erosion results in loss of AM propagules (Mosse, 1986), particularly in semiarid ecosystems (e.g. McGee, 1989), which decreases the mycorrhizal soil infectivity potential and thus limits the re-establishment of indigenous plants communities (Sylvia, 1990).…”

Section: Introductionmentioning

confidence: 99%

The mycorrhizal soil infectivity and arbuscular mycorrhizal fungal spore communities in soils of different aged fallows in Senegal

Duponnois

Plenchette

Thioulouse

et al. 2001

Applied Soil Ecology

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“…The fraction of viable spores in the total number of spores varied between 4.2 and 11.5% during the rainy period and between 3.9 and 9.8% during the dry period. According to McGee (1989), the number of viable spores in arid and semi-arid regions is usually relatively low. Lima et al (2007) also observed that the number of viable spores was low, oscillating between 1.5 and 3.7% of the totalnumber of spores, regardless of the land use system.…”

Section: Resultsmentioning

confidence: 99%

<b>Arbuscular mycorrhizal fungi within agroforestry and traditional land use systems in semi-arid Northeast Brazil</b> - doi: 10.4025/actasciagron.v35i3.16213

et al. 2013

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ABSTRACT. The diversity of arbuscular mycorrhizal fungi (AMF) can be a critical factor in enhancing both the productivity and the diversity of plants in ecosystems, and the plants in the ecosystem also strongly influence the occurrence of these fungi. The relationships between different land use systems and AMF communities in the semi-arid region of the State of Paraíba, NE Brazil were evaluated. The experiment followed a split-plot randomized block design, with four replicates. The main plots were defined by the presence or absence of trees (gliricidia and maniçoba), while the split plots were defined by three land use systems: 1) traditional cropping of maize + beans, 2) buffel grass pasture, and 3) prickly pear forage crop. The presence of trees increased sporulation, mycorrhizal colonization and the production of infective propagules of AMF in all three land use systems. Greater production of glomalin-related soil protein (GRSP) occurred in the prickly pear plots regardless of the presence or absence of trees. Species belonging to the Glomus genus predominated regardless of the presence of trees, land use systemor soil sampling period.Keywords: mycorrhizae, agroecosystems, glomalin.Fungos micorrízicos arbusculares em sistemas agroflorestais e sistemas tradicionais de uso da terra no semi-árido do nordeste do Brasil RESUMO. A diversidade de fungos micorrízicos arbusculares (FMA) pode ser um fator crucial para aumentar a produtividade e diversidade de plantas nos ecossistemas, e em contrapartida, as plantas também influenciam fortemente a ocorrência desses fungos. Foi avaliada a relação entre diferentes sistemas de uso da terra e as comunidades de FMA na região semi-árida do Estado da Paraíba, Nordeste do Brasil. O experimento foi conduzido em esquema de parcelas subdividas em blocos casualizados, com quatro repetições. A presença ou ausência de árvores (gliricídia e maniçoba) foram parcelas principais e três sistemas de uso da terra foram as subparcelas: 1) cultivo tradicional de milho + feijão; 2) pastagem de capim buffel e 3) cultivo de palma forrageira. A presença das árvores aumentou a colonização micorrízica, esporulação e produção de propágulos de FMA em todos os três sistemas de uso da terra. Houve maior produção de proteínas do solo relacionadas à glomalina pelos FMA em parcelas com o cultivo de palma forrageira, independentemente da presença das árvores. Espécies de FMA pertencentes ao gênero Glomus predominaram independentemente da presença das árvores, do sistema de uso da terra e do período de amostragem do solo.Palavras-chave: micorrizas, agroecossistemas, glomalina.

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“…Survival of arbuscular mycorrhizal fungi has been examined in the southern part of Australia. The fungi appear to survive mainly as hyphal networks (Jasper, Abbott & Robson, 1987;McGee, 1989;Bellgard, 1993), hyphae in dried root fragments (Tommerup & Abbott, 1981) and spores. Spores are common in agricultural soils (Mosse & Bowen, 1968;Abbott & Robson, 1977;Hayman & Stovold, 1979) and it is assumed that spores and fungi in root fragments are the main source of infection at the beginning of the growing season in soils used for cropping (Abbott & Gazey, 1994).…”

Section: Introductionmentioning

confidence: 99%

“…Crops are grown and annual native plants complete their life cycle during the period of available moisture. Spore germination is suppressed when soil temperatures are high (Tommerup, 19836;McGee, 1989). Some species of arbuscular mycorrhizal fungi m the family Acaulosporaceae have spores that go through a period of obligatory dormancy before germination (Tommerup, 1983«;Gazey, Abbott & Robson, 1993 ;McGee, unpublished) preventing germination during summer.…”

Section: Introductionmentioning

confidence: 99%

Survival of propagules of arbuscular mycorrhizal fungi in soils in eastern Australia used to grow cotton

et al. 1997

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SUMMARYSoil-borne spores and hj^phae of arbuscular mycorrhizal fungi are important propagules in cracking clay soils of northern NSW, Australia. In these soils, senescent roots were uncommon. Although c. 4-200 spores g~^ soil were found, less than 6 % established arbuscular mycorrhizas in trap plants, and this percentage declined over 24 months. Using tetrazolium red as a vital stain, 16-21 % of spores from field soils were found to be viable in fresh soil and 6-7 % after 24 months of storage. Using fluorescein diacetate, the length of stained hyphae of c. 0-5 m g~^ soil was shown to be halved over 32 wk. The density of viable propagules of arbuscular mycorrhizal fungi in soil declined over time and was reduced by severe disturbance. The fungi that survived to 12 months included a species thought to form dormant spores, while those initiating infection after 24 months, did not.

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Variation in propagule numbers of vesicular-arbuscular mycorrhizal fungi in a semi-arid soil

Cited by 95 publications

References 33 publications

The mycorrhizal soil infectivity and arbuscular mycorrhizal fungal spore communities in soils of different aged fallows in Senegal

The mycorrhizal soil infectivity and arbuscular mycorrhizal fungal spore communities in soils of different aged fallows in Senegal

<b>Arbuscular mycorrhizal fungi within agroforestry and traditional land use systems in semi-arid Northeast Brazil</b> - doi: 10.4025/actasciagron.v35i3.16213

Survival of propagules of arbuscular mycorrhizal fungi in soils in eastern Australia used to grow cotton

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