The Effect of Soil Acidity on Microbial Activity in Soils

Robson, A. D.; Abbott, Lynette

doi:10.1016/b978-0-12-590655-5.50009-8

Cited by 96 publications

(42 citation statements)

References 84 publications

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“…It has been observed that large number of spores can occur over a wide range of soil pH (Read et al, 1976), soil phosphate levels (Jeffries et al, 1988) and salinity (Gerdemann, 1968). There are also marked differences among species and strains of AM fungi in the effects of soil properties on their distribution and abundance (Robson and Abbott, 1989). The results obtained in this study confirm this variability.…”

Section: Discussionsupporting

confidence: 79%

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: Discussionsupporting

confidence: 79%

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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“…For example, Glomus prefers neutral or slightly alkaline pH (Zambolim and Siqueira, 1985;Schenck and Siqueira, 1987), while Gigaspora, Entrophospora, Sclerocystis favor acid soils (da Silva et al, 2005). Soil pH could affect spore germination (Green et al, 1976;Hepper, 1984), hyphal growth and formation (Abbott and Robson, 1985), thus, ultimately influence the quantity and quality of AMF colonization and alter the community composition (Robson and Abbott, 1989;Coughlan et al, 2000). We suppose that in the Realgar mining area low pH suppressed the development of local plants, and indirectly affected the AMF biodiversity, as the plant Shannon-Wiener richness index in sampling site S2 was lowest (0.73) and was significantly different from other sites except site S4.…”

Section: Discussionmentioning

confidence: 99%

The molecular diversity of arbuscular mycorrhizal fungi in the arsenic mining impacted sites in Hunan Province of China

Sun

Zhang

et al. 2016

Journal of Environmental Sciences

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Arbuscular mycorrhizal fungi (AMF) can establish a mutualistic association with most terrestrial plants even in heavy metal contaminated environments. It has been documented that high concentrations of toxic metals, such as arsenic (As) in soil could adversely affect the diversity and function of AMF. However, there are still gaps in understanding the community composition of AMF under long-term As contaminations. In the present study, six sampling sites with different As concentrations were selected in the Realgar mining area in Hunan Province of China. The AMF biodiversity in the rhizosphere soils of the dominant plant species was investigated by sequencing the nuclear small subunit ribosomal RNA (SSU rRNA) gene fragments using 454-pyrosequencing technique. A total of 11 AMF genera were identified, namely Rhizophagus, Glomus, Funneliformis, Acaulospora, Diversispora, Claroideoglomus, Scutellopora, Gigaspora, Ambispora, Praglomus, and Archaeospora, among which Glomus, Rhizophagus, and Claroideoglomus clarodeum were detected in all sampling sites, and Glomus was the dominant AMF genus in the Realgar mining area. Redundancy analysis indicated that soil pH, total As and Cd concentrations were the main factors influencing AMF community structure. There was a negative correlation between the AMF species richness and the total As concentration in the soil, but no significant correlation between the Shannon-Wiener index of the AMF and plants. Our study showed that high As concentrations can exert a selective effect on the AMF populations.

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“…Variations in moisture (Anderson et al, 1983), organic matter content (Klironomos et al, 1993), pH (Robson & Abbott, 1989), and temperature (Koske, 1987) may affect abundance of AMF spores.…”

Section: Introductionmentioning

confidence: 99%

Arbuscular mycorrhizal fungal communities in native and in replanted Araucaria forest

Moreira¹,

Baretta

Tsai³

et al. 2009

Sci. agric. (Piracicaba, Braz.)

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Araucaria angustifolia is an important Brazilian conifer, but it is endangered of extinction due to excessive logging. The objective of the present case study was to survey data on the diversity of AMF in Araucaria angustifolia forests, and to learn whether it is possible to discriminate between the AMF communities associated with natural, introduced, and impacted-byanthropogenic-action ecosystems. Three ecosystems representative of the Campos do Jordão (São Paulo State, Brazil) region were selected, as follows: (i) a native climax forest, with predominance of Araucaria trees, without anthropogenic interference (NF), (ii) Araucaria forest introduced in 1959 (RE), and (iii) Araucaria forest introduced in 1958, submitted to accidental fire in July 2001 (RF). Sampling of rhizosphere soil was performed at a 0-20 cm depth around each Araucaria tree, and 2 m from the trunk, in the months of May and October, 2002. AMF spores were separated from the soil, counted, and taxonomically identified, while the roots were evaluated for mycorrhizal colonization. The ecological indices R (Richness), Is (Simpson's dominance index) and H (Shannon's diversity index) were calculated. All the data were submitted to univariate (two-way ANOVA) and correspondence analysis (CA). Considering both samplings and the three areas, twenty-six AMF species were found, distributed among five genera, Acaulospora and Glomus being the most frequent ones. There were no differences among the three areas for R, Is, and H. CA demonstrated that there is a spatial separation among the three areas, and the AMF that preferentially associated with each area.

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The Effect of Soil Acidity on Microbial Activity in Soils

Cited by 96 publications

References 84 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

The molecular diversity of arbuscular mycorrhizal fungi in the arsenic mining impacted sites in Hunan Province of China

Arbuscular mycorrhizal fungal communities in native and in replanted Araucaria forest

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