Impact of agricultural management on arbuscular mycorrhizal fungal communities in Kenyan ferralsol

Mathimaran, Natarajan; Ruh, R.; Jama, Bashir; Verchot, Louis; Frossard, Emmanuel; Jansa, Jan

doi:10.1016/j.agee.2006.06.004

Cited by 121 publications

(79 citation statements)

References 53 publications

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“…In addition, OTU GIG_S26, grouping many sequences related to Gigasporales, was found in soil under all treatments. This finding was rather unexpected since members of this family are not usually detected (either as spores or sequences obtained from crop plants) in agricultural fields upon soil disturbance imposed either through agricultural use or by heavy landscaping machinery (Jansa et al 2003;Mathimaran et al 2007), but are in line with the results of Oehl et al (2005Oehl et al ( ,2010 based on spore identification tools from field samples. The results obtained with the GOCC56/GOCC427 primer pair highlights the difficulty of detecting Paraglomeraceae in root samples, as already reported by (Hijri et al 2006).…”

Section: Each Primer Combination Contributes To Amf Diversity Descripsupporting

confidence: 68%

Effects of different management practices on arbuscular mycorrhizal fungal diversity in maize fields by a molecular approach

et al. 2012

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Effects of different management practices on arbuscular mycorrhizal fungal diversity in maize fields by a molecular approach / R. Borriello; E. Lumini; M. Girlanda; P. Bonfante; V. Bianciotto. AbstractAs obligate mutualistic symbionts, arbuscular mycorrhizal fungi (AMF) colonize the roots of many agricultural crops, and it is often claimed that agricultural practices are detrimental to AMF. As a result, agroecosystems impoverished in AMF may not get the fully expected range of benefits from these fungi. Using molecular markers on DNA extracted directly from soil and roots, we studied the effects of different management practices (tillage and N fertilization) on the AMF communities colonizing an experimental maize field in Central Italy. Our molecular analysis based on three different nuclear rRNA regions (18S, 28S and ITS) allowed us to assess AMF biodiversity. Glomeraceae members were the main colonizer, and they co-occurred with Gigasporaceae and Paraglomus regardless of the management practices applied. Diversisporaceae and Entrophosporaceae members were instead detected in the N-fertilized soils and in the untreated soil, respectively. The results obtained indicated that the general AMF assemblages structure and composition in the maize field plots appear to be primarily influenced by N fertilization and, to a lesser extent, by tillage. This study also validates the usefulness of multiple molecular markers to consolidate and refine the assessment of the environmental AMF diversity.

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Section: Each Primer Combination Contributes To Amf Diversity Descripsupporting

confidence: 68%

Effects of different management practices on arbuscular mycorrhizal fungal diversity in maize fields by a molecular approach

et al. 2012

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“…Other works reported either consistent findings (Mathimaran et al 2007) or contrasting results, showing that winter cover crops and subsequent crops shared similar AMF communities (Higo et al 2014(Higo et al , 2015. Possible explanations of changes in AMF species abundance found in our work may entail either host preference or seasonal variations.…”

Section: Effect Of Ld and Hd Cover Crop Treatments On Amf Diversitycontrasting

confidence: 48%

Changes in the composition of native root arbuscular mycorrhizal fungal communities during a short-term cover crop-maize succession

et al. 2016

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Arbuscular mycorrhizal fungi (AMF) establish mutualistic associations with the most important agricultural food and feed crops, sustaining plant growth, nutrient uptake and tolerance of biotic and abiotic stresses. Scanty information is available on the role played by crop identity and diversity as a driving force shaping AMF species communities in the field, in particular in low-input and organic farming, where crop rotation and the use of cover crops are common practices. Here, using a molecular approach, we investigated whether plant communities established in low and high diversity cover crop treatments affect the composition of native AMF root communities of subsequent maize in a Mediterranean organic agroecosystem. A total of 16 AMF sequence types were detected, with Acaulospora cavernata as the most abundant phylotype, accounting for 37.4 % of the sequences, followed by Funneliformis mosseae, Claroideoglomus lamellosum and Rhizoglomus intraradices. Sequences matching to Funneliformis caledonium, Diversispora aurantia, Diversispora epigaea and Archaeospora schenckii corresponded to less than 2.0 % of the total. The most abundant sequences retrieved in plants from cover crop treatments were represented by A. cavernata, while sequences in maize roots were related to F. mosseae, R. intraradices and Glomus sp. Such data show for the first time a change in the composition of native AMF communities colonizing maize roots, which was independent of the identity and diversity of the preceding crop. Our findings suggest that host preference may represent a strong driver of AMF community dynamics in agroecosystems, differentially boosting or depressing AMF species, possibly in relation to their functional significance.

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“…Mathimaran et al (2007) found 18 species in Kenyan ferralsol soil and Emmanuel et al (2010) recorded 17 AMF species from soil fertility management systems in Nigeria. According to Helgason et al (1998), woodlands have higher AM fungal species richness and diversity compared to agricultural ecosystems.…”

Section: Discussionmentioning

confidence: 99%

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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Impact of agricultural management on arbuscular mycorrhizal fungal communities in Kenyan ferralsol

Cited by 121 publications

References 53 publications

Effects of different management practices on arbuscular mycorrhizal fungal diversity in maize fields by a molecular approach

Effects of different management practices on arbuscular mycorrhizal fungal diversity in maize fields by a molecular approach

Changes in the composition of native root arbuscular mycorrhizal fungal communities during a short-term cover crop-maize succession

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

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