Arbuscular mycorrhizal community structure on co-existing tropical legume trees in French Guiana

Brearley, Francis Q.; Elliott, David R.; Iribar, Amaia; Sen, Robin

doi:10.1007/s11104-016-2818-0

Cited by 15 publications

(12 citation statements)

References 65 publications

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“…SMITH & SMITH (2011a) reported that intracellular hyphae, arbuscules, and structures with intermediate morphology are involved in the transfer of nutrients to the host plant, not arbuscules alone. Therefore, the presence of the Paris morphological pattern in acerola roots is a positive factor for nutrient absorption in the crop, enhancing plant growth, which was also noted in other plant species in a study conducted by BREARLEY et al (2016). Similar findings were also reported by HARIKUMAR et al (2015) in plants with the Paris morphological pattern with satisfactory growth.…”

Section: Resultssupporting

confidence: 84%

Morphological pattern of colonization by mycorrhizal fungi and the microbial activity observed in Barbados cherry crops

et al. 2017

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Our objective was to evaluate the morphological pattern of colonization by arbuscular mycorrhizal fungi (AMF) as well as to study the microbiological activity of the soil on family farms where Barbados cherry was cultivated. Soil and root samples were selected from four areas in the municipality of Maranguape-CE where Barbados cherry was grown, which were named according to the age of plants in the following manner: A1-3, A2-3, and A3-3 (3 years), and A4-2 (2 years). After sampling, the arbuscular mycorrhizal colonization, morphological colonization pattern, basal soil respiration (SBR), and density of mycorrhizal spores (DS) were analyzed. The Paris-type morphological pattern was predominant in the root system of Barbados cherry; the affinity of this pattern in the culture was clear. Time of installation and management of Barbados cherry orchards in family farming areas promoted reduction in SBR. P levels in the soil may have negatively influenced root colonization and density of mycorrhizal spores.

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Section: Resultssupporting

confidence: 84%

Morphological pattern of colonization by mycorrhizal fungi and the microbial activity observed in Barbados cherry crops

et al. 2017

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“…Most VT detected in this study belonged to the Glomeraceae, which is the most widespread family in natural and managed ecosystems (Lumini et al ., ; Oehl et al ., ; Brearley et al ., ). Surprisingly, Paraglomeraceae, a family rarely detected in high numbers even in other tropical and temperate grasslands (Uhlmann et al ., ; Moora et al ., ; Xiang et al ., ) was the most abundant family in Gorongosa National Park (GNP) grasslands.…”

Section: Discussionmentioning

confidence: 98%

Arbuscular mycorrhizal fungi communities from tropical Africa reveal strong ecological structure

et al. 2016

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SummaryUnderstanding the distribution and diversity of arbuscular mycorrhizal fungi (AMF) and the rules that govern AMF assemblages has been hampered by a lack of data from natural ecosystems. In addition, the current knowledge on AMF diversity is biased towards temperate ecosystems, whereas little is known about other habitats such as dry tropical ecosystems.We explored the diversity and structure of AMF communities in grasslands, savannas, dry forests and miombo in a protected area under dry tropical climate (Gorongosa National Park, Mozambique) using 454 pyrosequencing.In total, 147 AMF virtual taxa (VT) were detected, including 22 VT new to science. We found a high turnover of AMF with ˂ 12% of VT present in all vegetation types. Forested areas supported more diverse AMF communities than savannas and grassland. Miombo woodlands had the highest AMF richness, number of novel VT, and number of exclusive and indicator taxa.Our data reveal a sharp differentiation of AMF communities between forested areas and periodically flooded savannas and grasslands. This marked ecological structure of AMF communities provides the first comprehensive landscape-scale evidence that, at the background of globally low endemism of AMF, local communities are shaped by regional processes including environmental filtering by edaphic properties and natural disturbance.

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“…Other studies using ribosomal DNA barcodes (not necessarily the ITS1 barcoding region) to distinguish taxa have encountered high AMF diversity in tropical forests: Husband et al (2002) found 30 OTUs associating with two tree species, and Haug et al (2010) found 102 AMF associating with 23 different tree genera. Another study detected 34 taxa associating with two tree species using denaturing gradient gel electrophoresis (Brearley et al 2016). To our knowledge, no other study has identified a greater alpha diversity of AMF at one site (but see discussion on limitations of DNA metabarcoding below).…”

Section: Discussionmentioning

confidence: 96%

“…Another study detected 34 taxa associating with two tree species using denaturing gradient gel electrophoresis (Brearley et al . ). To our knowledge, no other study has identified a greater alpha diversity of AMF at one site (but see discussion on limitations of DNA metabarcoding below).…”

Section: Discussionmentioning

confidence: 97%

Community composition and diversity of Neotropical root‐associated fungi in common and rare trees

et al. 2018

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Interactions between plants and root‐associated fungi can affect the assembly, diversity, and relative abundances of tropical plant species. Host–symbiont compatibility and some degree of host specificity are prerequisites for these processes to occur, and these prerequisites may vary with host abundance. However, direct assessments of whether specificity of root‐associated fungi varies with host abundance are lacking. Here, in a diverse tropical forest in Los Tuxtlas, Mexico, we couple DNA metabarcoding with a sampling design that controls for host phylogeny, host age, and habitat variation, to characterize fungal communities associated with the roots of three confamilial pairs of host species that exhibit contrasting (high and low) relative abundances. We uncovered a functionally and phylogenetically diverse fungal community composed of 1,038 OTUs (operational taxonomic units with 97% genetic similarity), only 14 of which exhibited host specificity. Host species was a significant predictor of fungal community composition only for the subset of OTUs composed of putatively pathogenic fungi. We found no significant difference in the number of specialists associating with common versus rare trees, but we found that host abundance was negatively correlated with the diversity of root fungal communities. This latter result was significant for symbiotrophs (mostly arbuscular mycorrhizal fungi) and, to a lesser extent, for pathotrophs (mostly plant pathogens). Thus, root fungal communities differ between common and rare trees, which may impact the strength of conspecific negative density dependence. Further studies from other tropical sites and host lineages are warranted, given the role of root‐associated fungi in biodiversity maintenance.

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Arbuscular mycorrhizal community structure on co-existing tropical legume trees in French Guiana

Cited by 15 publications

References 65 publications

Morphological pattern of colonization by mycorrhizal fungi and the microbial activity observed in Barbados cherry crops

Morphological pattern of colonization by mycorrhizal fungi and the microbial activity observed in Barbados cherry crops

Arbuscular mycorrhizal fungi communities from tropical Africa reveal strong ecological structure

Community composition and diversity of Neotropical root‐associated fungi in common and rare trees

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