Distribution of roots, arbuscular mycorrhizal colonisation and spores around fast-growing tree species in Senegal

Ingleby, K.; Diagne, O.; Deans, J. D.; Lindley, Daniel; Neyra, Marc; Ducousso, Marc

doi:10.1016/s0378-1127(96)03875-3

Cited by 35 publications

(30 citation statements)

References 24 publications

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“…AMF were present in all roots and rhizosphere soil samples of acacia trees with low (12%) to moderate (67.3%) levels of colonization. This pattern is similar to that observed in other tropical systems such as (0 to 75% colonization) in acacia and other woody legume species in dry deciduous forest areas of Northern Ethiopia (Birhane et al, 2010), (31 to 64% colonization) in acacia and prosopis tree species in Senegal (Ingleby et al, 1997), (35 to 65% colonization) in acacia tree species, in India (Lakshman et al, 2001) and (56 to 73% colonization) in A. farnesiana and A. planifrons, in India (Udaiyan et al, 1996). This study showed intra-and interspecific variations in AM colonization among acacia plants (Table 3).…”

Section: Discussionsupporting

confidence: 89%

“…Low AMF spore numbers were also recorded in a survey of acacia tree species (49 to 67 spores 100 g -1 soil) in India (Lakshman et al, 2001) and in acacia and prosopis tree species (8 to 51 spores 100 g -1 soil) in Senegal (Ingleby et al, 1997). The variation in AMF spore density between samples could be due to factors such as climatic and edaphic properties, spatial and temporal variation, vegetation, host-specificity between fungi and plants, age of the host plants, disturbance, and differential sporulation ability of AMF taxa (Husband et al, 2002;Muthukumar and Udaiyan, 2002).…”

Section: Discussionmentioning

confidence: 71%

See 1 more Smart Citation

Diversity and abundance of arbuscular mycorrhizal fungi associated with acacia trees from different land use systems in Ethiopia

Belay¹,

Vestberg²,

Assefa³

2013

Afr. J. Microbiol. Res.

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Root samples and rhizosphere soil of nine acacia species (Acacia abyssinica, Faidherbia albida, A. nilotica, A. senegal, A. seyal, A. sieberiana, A. saligna, A. tortilis and A. robusta) were collected from Bishoftu, Zeway and Addis Ababa sites with different land use types to assess their Arbuscular Mycorrhizal Fungal (AMF) diversity, spore density and root colonization. The percentage of root length colonized by AMF was estimated. Spores, spore clusters and sporocarps extracted from soil samples were counted and morphologically identified to species or specific morphotype. Roots of all acacia species were colonized from low to moderate or relatively high levels by AMF with the occurrence of arbuscules, vesicles and hyphae. Arbuscules were however not detected in roots of A. senegal. The highest AM fungal colonization was found in A. seyal (67.3%) from open grazing field (OGF) at Zeway followed by A. nilotica (44%), whereas the lowest AMF colonization of 12% was recorded in A. saligna at Bishoftu. Rhizosphere soils harbored AMF fungal spores ranging from 3.7 spores g -1 soil in A. nilotica to 15.0 spores g -1 in A. seyal from open grazing field (OGF) at Zeway. A total of 41 AMF species in 14 genera and 7 families of the Glomeromycota were identified. Nine species belonged to Acaulospora, 6 to Funneliformis, 4 each to Gigaspora, Glomus, and Rhizophagus, 3 each to Claroideoglomus, and Scutellospora, 2 each to Racocetra and Diversispora, and 1 each to Entrophospora, Sclerocystis, Paraglomus and Pacispora. Moreover, 2 unidentified morphotypes each of Glomus, and Acaulospora and 1 of Archaeospora were isolated. Based on relative abundance and isolation frequency of spores, C. claroideum, C. etunicatum, C. luteum, F. geosporus and G. aggregatum were the dominant species in the study. The study showed that the acacia species were characterized by relatively high AMF colonization and very high AMF diversity. AMF spore density and AM root colonization in acacia roots were influenced by soil factors such as available P and soil texture.

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Section: Discussionsupporting

confidence: 89%

Section: Discussionmentioning

confidence: 71%

Diversity and abundance of arbuscular mycorrhizal fungi associated with acacia trees from different land use systems in Ethiopia

Belay¹,

Vestberg²,

Assefa³

2013

Afr. J. Microbiol. Res.

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“…Spores of AM fungi were concentrated mostly in the soil surface layer (0-10 cm), which supports the view that spore production is at a maximum near the soil surface (Abbott and Robson, 1991;Ingleby et al, 1997). Though the spore numbers were not related to AM fungal colonization levels when all the forest types were considered together; significant relationships emerged when the forest types were considered separately (primary forest: r = 0.35; P < 0.002, secondary forest: r = 0.41; P < 0.001 and limestone forest: r = 0.49; P < 0.001, n = 40).…”

Section: Spore Numberssupporting

confidence: 78%

“…A decrease in AM colonization levels and root length with AM fungal structures is consistent with the view that mycorrhizal colonization decreases with depth (Abbott and Robson, 1991). However, this contradicts the results of Ingleby et al (1997), which failed to detect any decrease in mycorrhizal colonization levels with increasing soil depth in a legume tree plantation in Senegal. Similarly Moyersoen et al (1998) also failed to find variations in AM colonization levels with soil depth in rainforest in Korup National Park, Cameroon.…”

Section: Mycorrhizal Colonizationsupporting

confidence: 66%

Distribution of roots and arbuscular mycorrhizal associations in tropical forest types of Xishuangbanna, southwest China

Muthukumar

Sha

Yang

et al. 2003

Applied Soil Ecology

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Root distribution and mycorrhizal associations were compared in primary, secondary and limestone forests in Xishuangbanna, southwest China. Soil cores to a depth of 20 cm were collected at random points from four 50 m 2 quadrats in each forest type. Arbuscular mycorrhizal (AM) associations were the only form of mycorrhiza found in all forest types. The primary forest was characterized by high root mass, root lengths and AM colonization levels higher than other forest types. In contrast, secondary forests had greater AM fungal spore numbers and specific root length, indicating that plant species in secondary forests achieved a greater degree of soil exploration with less biomass allocation to roots. Root density, AM colonization and AM fungal spore numbers decreased with soil depth in all forest types. Although the correlation between AM colonization levels and spore numbers was insignificant when all forest types were considered together, significant relationships emerged when each forest type was considered individually. AM colonization and spore numbers were correlated with several root variables.

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“…Enquanto em CaatR permaneceu a vegetação nativa, embora perturbada, em CultP o desmatamento foi total, com substituição da mata nativa por agricultura ou pecuária de subsistência. Na camada de 7,5-15 cm o número de esporos viáveis não diferiu entre categorias de uso do solo, mas foi menor do que na camada superior; este último resultado coincidiu com a tendência encontrada em outros trabalhos (Bellgard, 1993;Ingleby et al, 1997).…”

Section: Resultados E Discussão Esporos Viáveis E Não-viáveisunclassified

Propágulos de fungos micorrízicos arbusculares em solos deficientes em fósforo sob diferentes usos, da região semi-arida no nordeste do Brasil

Lima

Salcedo

Fraga

2007

Rev. Bras. Ciênc. Solo

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Distribution of roots, arbuscular mycorrhizal colonisation and spores around fast-growing tree species in Senegal

Cited by 35 publications

References 24 publications

Diversity and abundance of arbuscular mycorrhizal fungi associated with acacia trees from different land use systems in Ethiopia

Diversity and abundance of arbuscular mycorrhizal fungi associated with acacia trees from different land use systems in Ethiopia

Distribution of roots and arbuscular mycorrhizal associations in tropical forest types of Xishuangbanna, southwest China

Propágulos de fungos micorrízicos arbusculares em solos deficientes em fósforo sob diferentes usos, da região semi-arida no nordeste do Brasil

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