Factors Controlling the Distribution of Vesicular-Arbuscular Mycorrhizal Fungi in Relation to Soil pH

Porter, WM; Robson, A. D.; Abbott, Lynette

doi:10.2307/2403901

Cited by 53 publications

(26 citation statements)

References 17 publications

(8 reference statements)

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“…We speculate that predominance of the Acaulosporaceae in our study could be the result of either contemporary ecological (e.g., soil chemical characteristics, plant species) or historical factors (e.g., dispersal, local extinction). Soil factors have been implicated as determinants of AMF distribution and members of Acaulosporaceae could be favored by the low pH found in soils of all three stages as has been reported in the literature for distinct ecosystems (Porter et al 1987;Siqueira et al 1989). Conversely, considering that our study encompasses areas in secondary succession up to 40 years after land abandonment, we could hypothesize that members of Acaulosporaceae are dominant in early to intermediate stages while Glomeraceae predominates in more advanced stages of the succession process or in undisturbed areas of tropical forests.…”

Section: Number Of Viable Sporesmentioning

confidence: 84%

Occurrence of arbuscular mycorrhizal fungi in soils of early stages of a secondary succession of Atlantic Forest in South Brazil

et al. 2006

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RESUMO -(Ocorrência de fungos micorrízicos arbusculares em solos de estádios iniciais de uma sucessão secundária da Floresta Atlântica no Sul do Brasil). A diversidade de fungos micorrízicos arbusculares (FMAs) e o potencial de inóculo micorrízico foram determinados em estádios de sucessão secundária da Floresta Atlântica. Dentro de cada estádio -pioneiro, capoeirinha e capoeirão -quatro transectos foram estabelecidos e três amostras de solo foram obtidas por transecto. A comunidade vegetal foi dominada por Pteridium aquilinium no estádio pioneiro e Dodonaea viscosa e P. aquilinium foram co-dominantes na capoeirinha. No capoeirão, Miconia cinnamomifolia foi dominante seguida por Euterpe edulis. O número total de esporos foi significativamente maior na capoeirinha do que nos outros estádios, embora o número de esporos viáveis permaneceu constante entre os estádios sucessionais. Acaulosporaceae e Glomeraceae foram as famílias predominantes e perfizeram 83% do total de esporos recuperados. Dos 18 morfotipos de esporos recuperados, 10 foram alocados para espécies conhecidas, com uma espécie de Acaulospora sp. e uma de Glomus sp. sendo os esporuladores predominantes e presentes em todas as amostras. O indíce de diversidade de Simpson e a eqüitabilidade para as espécies de FMAs não diferiram significativamente entre os estádios sucessionais e a riqueza específica de FMAs foi negativamente correlacionada com a riqueza específica vegetal. O solo da Capoeirinha apresentou o maior potencial de inóculo (37%). A dominância da comunidade micorrízica por poucos esporuladores e a relação entre diversidade fúngica e vegetal são discutidos.Palavras-chave: Glomerales, fungos micorrízicos arbusculares, Floresta Atlântica, sucessão vegetal secundária, diversidade de espécies ABSTRACT -(Occurrence of arbuscular mycorrhizal fungi in soils of early stages of a secondary succession of Atlantic Forest in South Brazil). Arbuscular mycorrhizal fungi (AMF) species diversity and mycorrhizal inoculum potential were assessed in areas representative of stages of secondary succession in the Brazilian Atlantic Rain Forest. Within each stage -pioneer, 'capoeirinha' and 'capoeirão'-four transects were established and three soil samples were taken along each transect. The plant community was dominated by Pteridium aquilinium in the pioneer stage, while Dodonaea viscosa and P. aquilinium were co-dominants in the 'capoeirinha' stage. In capoeirão, Miconia cinnamomifolia was dominant followed by Euterpe edulis. Total spore number per 100 g soil was significantly larger in the 'capoeirinha' stage than in the other stages, although the number of viable spores was similar among stages. Acaulosporaceae and Glomeraceae were the predominant families accounting for 83% of the total spores recovered. Of the 18 spore morphotypes, 10 were allocated to known species, with Acaulospora sp. and Glomus sp. being the dominants recovered in all samples. Simpson's index of diversity and evenness for AMF species were not significantly different among the successional st...

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Section: Number Of Viable Sporesmentioning

confidence: 84%

Occurrence of arbuscular mycorrhizal fungi in soils of early stages of a secondary succession of Atlantic Forest in South Brazil

et al. 2006

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“…Furthermore, anthropogenic increases in N and P deposition will alter the geographic distributions of AM fungi. Many more edaphic characteristics could directly affect AM fungal species distributions, but this area of research has been previously reviewed Lambert et al 1980;Porter et al 1987). Our brevity in this section should not be interpreted to indicate that edaphic properties are not an important control of AM fungal species distributions.…”

Section: Edaphic Characteristicsmentioning

confidence: 99%

Macroecology of Microbes – Biogeography of the Glomeromycota

2008

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“…Soil pH is a factor that normally affects the development of mycorrhizal symbiosis (17,28,31), mainly at acidic levels when the soil presents high Al + and H + contents, which are toxic to AMF (26,30) and cause the adsorption of phosphorus, making it unavailable to the plant.…”

Section: Root Colonizationmentioning

confidence: 99%

Successive cultivation of maize and agricultural practices on root colonization, number of spores and species of arbuscular mycorrhizal fungi

Carrenho

Silva

Trufem

et al. 2001

Braz. J. Microbiol.

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A large number of propagules and a broad spectrum of species are two important components of ecosystem (including agroecosystem) sustainability. Previous studies carried out in temperate areas showed that repeated monoculture leads to a decrease in the species abundance of arbuscular mycorrhizal fungi (AMF). This study evaluated the influence of maize monoculture and its agricultural practices on AMF during three consecutive cropping years in a Brazilian field. At the end of each cycle, soil and root samples were evaluated for species composition, spore populations and root colonization by AMF. The AMF community present during this period was scored according to the Spearman rank correlation and Principal Components Analysis. The mean percent root colonization values for the three cultivation periods were: 66.9, 60.7 and 70.5, respectively. Seven species were detected in the first year, Scutellospora persica being the most abundant (24.1% of spores) and Glomus macrocarpum the most observed (100% of samples). In the second year, Glomus etunicatum was the species with the greatest number of spores (24.7%) and, like G. macrocarpum, the most frequently observed (90%) in a community of thirteen. In the third year, twenty-three AMF species were identified, Scutellospora sp. 1 being the most abundant (17.4%), and Gigaspora decipiens and Glomus claroideum the most frequent (both with a relative frequency of 70%). The main soil factors influencing root colonization and sporulation by AMF were pH (and related properties), phosphorus and organic matter contents.

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Factors Controlling the Distribution of Vesicular-Arbuscular Mycorrhizal Fungi in Relation to Soil pH

Cited by 53 publications

References 17 publications

Occurrence of arbuscular mycorrhizal fungi in soils of early stages of a secondary succession of Atlantic Forest in South Brazil

Occurrence of arbuscular mycorrhizal fungi in soils of early stages of a secondary succession of Atlantic Forest in South Brazil

Macroecology of Microbes – Biogeography of the Glomeromycota

Successive cultivation of maize and agricultural practices on root colonization, number of spores and species of arbuscular mycorrhizal fungi

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