Changes in the composition and diversity of AMF communities mediated by management practices in a Mediterranean soil are related with increases in soil biological activity

Alguacil, M.M.; Torrecillas, E.; García‐Orenes, Fuensanta; Roldán, A.

doi:10.1016/j.soilbio.2014.05.002

Cited by 82 publications

(43 citation statements)

References 74 publications

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“…Enzyme activities are involved in nutrient cycling and decomposition of organic matter and respond quickly to any form of change occurring in the system. The importance of urease, dehydrogenase, and total carbohydrates in shaping AMF communities suggests that, in the semiarid soils studied, where biological activity is generally very low (86), the structure of AMF assemblages is partly determined by the soil parameters directly related to microbial activity (13). Our results also showed that the phylogenetic compositions of AMF communities in soils with high (THA) or low (THP) microbiological activity were not phylogenetically clustered.…”

Section: Discussionmentioning

confidence: 56%

“…There is no doubt that soil type has a role in the AMF distribution (10,34,35,40,(77)(78)(79)(80), and our work also demonstrated that soil type is a major factor driving AMF assemblages, after elimination of the host factor and other environmental variables not related to soil characteristics. Although individual soil characteristics have been reported to play important roles in AMF community structure and composition (7,11,13,40,42,78,(81)(82)(83), very limited data sets regarding soil characteristics were used in these studies, and the relative incidences of each soil property determined after complete soil characterization have not been reported previously.…”

Section: Discussionmentioning

confidence: 99%

“…Those studies considered AMF communities associated with different host plants in many different ecosystems. However, studies comparing the occurrence of specific AMF species and communities in different soil types are scarce and have focused mainly on cultivated soils and different land uses (10)(11)(12)(13). Differences in soil types have been reported to be key factors determining AMF community composition (10), and this is particularly relevant in stressed environments such as serpentine soils (14)(15)(16), thermal soils (17), heavy metal soils, and saline soils (18)(19)(20)(21)(22)(23).…”

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confidence: 99%

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Soil Characteristics Driving Arbuscular Mycorrhizal Fungal Communities in Semiarid Mediterranean Soils

Alguacil

Torres

Montesinos‐Navarro

et al. 2016

Appl Environ Microbiol

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We investigated communities of arbuscular mycorrhizal fungi (AMF) in the roots and the rhizosphere soil of Brachypodium retusum in six different natural soils under field conditions. We explored phylogenetic patterns of AMF composition using indicator species analyses to find AMF associated with a given habitat (root versus rhizosphere) or soil type. We tested whether the AMF characteristics of different habitats or contrasting soils were more closely related than expected by chance. Then we used principal-component analysis and multivariate analysis of variance to test for the relative contribution of each factor in explaining the variation in fungal community composition. Finally, we used redundancy analysis to identify the soil properties that significantly explained the differences in AMF communities across soil types. The results pointed out a tendency of AMF communities in roots to be closely related and different from those in the rhizosphere soil. The indicator species analyses revealed AMF associated with rhizosphere soil and the root habitat. Soil type also determined the distribution of AMF communities in soils, and this effect could not be attributed to a single soil characteristic, as at least three soil properties related to microbial activity, i.e., pH and levels of two micronutrients (Mn and Zn), played significant roles in triggering AMF populations. IMPORTANCECommunities of arbuscular mycorrhizal fungi (AMF) are main components of soil biota that can determine the productivity of ecosystems. These fungal assemblages vary across host plants and ecosystems, but the main ecological processes that shape the structures of these communities are still largely unknown. A field study in six different soil types from semiarid areas revealed that AMF communities are significantly influenced by habitat (soil versus roots) and soil type. In addition, three soil properties related to microbiological activity (i.e., pH and manganese and zinc levels) were the main factors triggering the distribution of AMF. These results contribute to a better understanding of the ecological factors that can shape AMF communities, an important soil microbial group that affects multiple ecosystem functions.A rbuscular mycorrhizal fungi (AMF) represent an important soil microbial group that affects multiple ecosystem functions and processes, including nutrient cycling, plant productivity and competition, and plant diversity. As a consequence, the number of ecological studies concerning AMF has increased considerably in recent years (1-9). Those studies considered AMF communities associated with different host plants in many different ecosystems. However, studies comparing the occurrence of specific AMF species and communities in different soil types are scarce and have focused mainly on cultivated soils and different land uses (10-13). Differences in soil types have been reported to be key factors determining AMF community composition (10), and this is particularly relevant in stressed environments such as serpentine soi...

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Section: Discussionmentioning

confidence: 56%

Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

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Soil Characteristics Driving Arbuscular Mycorrhizal Fungal Communities in Semiarid Mediterranean Soils

Alguacil

Torres

Montesinos‐Navarro

et al. 2016

Appl Environ Microbiol

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“…The lower number of species detected in the present work, compared with such a study, may be a consequence of the specific environment of the Bhot spot area^, the methodology used (morphological vs molecular) or the material analysed (spores vs roots). Actually, in root material, only sequences of colonizing AMF are retrieved, leading to the detection of lower species richness than in soil (Hempel et al 2007;Balestrini et al 2010;Alguacil et al 2014). Fig.…”

Section: Identification Of Root Colonizing Amfmentioning

confidence: 99%

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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“…In Italy, Njeru et al (2014) reported a beneficial effect of CC on the AMF colonization of the subsequent organic maize crop. Other studies in the Mediterranean areas of SE Spain reported the effects of management practices on AMF (Alguacil et al, 2014), but most of the research is focused on natural ecosystems (Barea et al, 2011;Ortiz et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Biological and other soil parameters response to winter cover crops in a mediterranean irrigated system

González¹

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Changes in the composition and diversity of AMF communities mediated by management practices in a Mediterranean soil are related with increases in soil biological activity

Cited by 82 publications

References 74 publications

Soil Characteristics Driving Arbuscular Mycorrhizal Fungal Communities in Semiarid Mediterranean Soils

Soil Characteristics Driving Arbuscular Mycorrhizal Fungal Communities in Semiarid Mediterranean Soils

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

Biological and other soil parameters response to winter cover crops in a mediterranean irrigated system

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