Perennial plant species from semiarid gypsum soils support higher AMF diversity in roots than the annual Bromus rubens

Alguacil, M.M.; Torrecillas, E.; Roldán, A.; Díaz, G.; Torres, M.P.

doi:10.1016/j.soilbio.2012.02.024

Cited by 40 publications

(27 citation statements)

References 36 publications

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“…This finding is in line with two recent studies which both showed the annuals and perennials had distinct AMF community composition in roots Alguacil et al 2012). However, they found a higher or lower diversity of AMF in the annuals than the perennials.…”

Section: Discussionsupporting

confidence: 93%

Differential effects of abiotic factors and host plant traits on diversity and community composition of root-colonizing arbuscular mycorrhizal fungi in a salt-stressed ecosystem

Guo

Gong

2013

Mycorrhiza

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Arbuscular mycorrhizal fungi (AMF) were investigated in roots of 18 host plant species in a salinized south coastal plain of Laizhou Bay, China. From 18 clone libraries of 18S rRNA genes, all of the 22 AMF phylotypes were identified into Glomus, of which 18 and 4 were classified in group A and B in the phylogenetic tree, respectively. The phylotypes related to morphologically defined Glomus species occurred generally in soil with higher salinity. AMF phylotype richness, Shannon index, and evenness were not significantly different between root samples from halophytes vs. non-halophytes, invades vs. natives, or annuals vs. perennials. However, AMF diversity estimates frequently differed along the saline gradient or among locations, but not among pH gradients. Moreover, UniFrac tests showed that both plant traits (salt tolerance, life style or origin) and abiotic factors (salinity, pH, or location) significantly affected the community composition of AMF colonizers. Redundancy and variation partitioning analyses revealed that soil salinity and pH, which respectively explained 6.9 and 4.2 % of the variation, were the most influential abiotic variables in shaping the AMF community structure. The presented data indicate that salt tolerance, life style, and origin traits of host species may not significantly affect the AMF diversity in roots, but do influence the community composition in this salinized ecosystem. The findings also highlight the importance of soil salinity and pH in driving the distribution of AMF in plant and soil systems.

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Section: Discussionsupporting

confidence: 93%

Differential effects of abiotic factors and host plant traits on diversity and community composition of root-colonizing arbuscular mycorrhizal fungi in a salt-stressed ecosystem

Guo

Gong

2013

Mycorrhiza

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“…Oehl et al (9), in an extensive study, found that soil type is a key factor determining the composition of the AMF community. Recent AMF diversity studies have revealed that the AMF community composition is host plant dependent (16,17,21,22,(59)(60)(61)(62)(63)(64). Interestingly, when we focused on the plant and AMF communities inhabiting gypsum soils, we also found differences between the AMF harbored in gypsophyte and gypsovag plants.…”

Section: Discussionmentioning

confidence: 58%

“…Specifically, plant-AMF symbioses and AMF diversity have been studied recently in gypsum ecosystems, where it has been found that the AMF community is host plant dependent (20,21), such that different AMF communities colonize perennial and annual plant species (22), and gypsovags exhibit a higher AMF infection rate than gypsophytes (5). Despite these previous findings, it still remains unknown whether the community composition of the AMF colonizing the roots of gypsovags differs markedly from that for gypsophytes when both are growing in gypsum soils.…”

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confidence: 99%

Modularity Reveals the Tendency of Arbuscular Mycorrhizal Fungi To Interact Differently with Generalist and Specialist Plant Species in Gypsum Soils

Torrecillas

Alguacil

Roldán

et al. 2014

Appl Environ Microbiol

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Patterns in plant-soil biota interactions could be influenced by the spatial distribution of species due to soil conditions or by the functional traits of species. Gypsum environments usually constitute a mosaic of heterogeneous soils where gypsum and nongypsum soils are imbricated at a local scale. A case study of the interactions of plants with arbuscular mycorrhizal fungi (AMF) in gypsum environments can be illustrative of patterns in biotic interactions. We hypothesized that (i) soil characteristics might affect the AMF community and (ii) there are differences between the AMF communities (modules) associated with plants exclusive to gypsum soils (gypsophytes) and those associated with plants that show facultative behavior on gypsum and/or marlylimestone soils (gypsovags). We used indicator species and network analyses to test for differences between the AMF communities harbored in gypsophyte and gypsovag plants. We recorded 46 operational taxonomic units (OTUs) belonging to nine genera of Glomeromycota. The indicator species analysis showed two OTUs preferentially associating with gypsum soils and three OTUs preferentially associating with marly-limestone soils. Modularity analysis revealed that soil type can be a major factor shaping AMF communities, and some AMF groups showed a tendency to interact differently with plants that had distinct ecological strategies (gypsophytes and gypsovags). Characterization of ecological networks can be a valuable tool for ascertaining the potential influence of above-and below-ground biotic interactions (plant-AMF) on plant community composition.

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“…This is a high level of AMF community richness considering that only a single plant species was studied. In previous studies focusing on much more diverse plant communities in semiarid Mediterranean ecosystems (17)(18)(19), we have found values for AMF community richness in individual plant species ranging between 8 and 20. All samples from epiphytic plants showed AMF sequences, thus confirming that S. tenerrimus epiphytic plants establish a symbiotic relationship with AMF.…”

Section: Discussionmentioning

confidence: 78%

“…Six OTU were found exclusively in samples from epiphytes; of these, Glo G2 was the most abundant, although it was only found in two locations. This AMF was described as a new type of Glomeraceae by Wubet et al (34) from the roots of trees in an Afromontane dry forest and was later reported in gypsum ecosystems from semiarid areas (18). Therefore, we cannot ascertain whether Glo G2 is an AMF with a preference for epiphytic life forms.…”

Section: Discussionmentioning

confidence: 87%

Influence of Habitat and Climate Variables on Arbuscular Mycorrhizal Fungus Community Distribution, as Revealed by a Case Study of Facultative Plant Epiphytism under Semiarid Conditions

Torrecillas

Torres

Alguacil

et al. 2013

Appl Environ Microbiol

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bIn semiarid Mediterranean ecosystems, epiphytic plant species are practically absent, and only some species of palm trees can support epiphytes growing in their lower crown area, such as Phoenix dactylifera L. (date palm). In this study, we focused on Sonchus tenerrimus L. plants growing as facultative epiphytes in P. dactylifera and its terrestrial forms growing in adjacent soils. Our aim was to determine the possible presence of arbuscular mycorrhizal fungi (AMF) in these peculiar habitats and to relate AMF communities with climatic variations. We investigated the AMF community composition of epiphytic and terrestrial S. tenerrimus plants along a temperature and precipitation gradient across 12 localities. Epiphytic roots were colonized by AMF, as determined by microscopic observation; all of the epiphytic and terrestrial samples analyzed showed AMF sequences from taxa belonging to the phylum Glomeromycota, which were grouped in 30 AMF operational taxonomic units. The AMF community composition was clearly different between epiphytic and terrestrial root samples, and this could be attributable to dispersal constraints and/or the contrasting environmental and ecophysiological conditions prevailing in each habitat. Across sites, the richness and diversity of terrestrial AMF communities was positively correlated with rainfall amount during the most recent growing season. In contrast, there was no significant correlation between climate variables and AMF richness and diversity for epiphytic AMF communities, which suggests that the composition of AMF communities in epiphytic habitats appears to be largely determined by the availability and dispersion of fungal propagules from adjacent terrestrial habitats. E piphytism is a characteristic life form of humid and perhumid tropical forest, especially those at middle and higher elevations denominated montane cloud forest. In Mediterranean ecosystems, epiphytic vegetation is restricted to some mesic habitats in temperate regions where ferns, lichens, and bryophytes are common as epiphytes on the trunks of living trees. In semiarid Mediterranean ecosystems, characterized by low irregular annual rainfall and high temperatures (mild winter temperatures and hot summer), epiphytic plant species are practically absent. Actually, under these semiarid environmental conditions, only some species of palm trees can support epiphytes growing in their lower crown area, such as Phoenix canariensis (1), which is restricted to gardens, or Phoenix dactylifera (date palm), which is widely cultivated and frequently naturalized (2). In date palms the armpits of cut leafs form a good mechanical support place for epiphyte establishment and growth and also constitute an enabling environment for the accumulation of water and organic matter. Although several plant species can eventually be found as facultative epiphytes (epiphytes that can inhabit the canopy or ground interchangeably (3), the most common species and almost always present growing on date palm trunks is Sonchus tenerrimus L., a wi...

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Perennial plant species from semiarid gypsum soils support higher AMF diversity in roots than the annual Bromus rubens

Cited by 40 publications

References 36 publications

Differential effects of abiotic factors and host plant traits on diversity and community composition of root-colonizing arbuscular mycorrhizal fungi in a salt-stressed ecosystem

Differential effects of abiotic factors and host plant traits on diversity and community composition of root-colonizing arbuscular mycorrhizal fungi in a salt-stressed ecosystem

Modularity Reveals the Tendency of Arbuscular Mycorrhizal Fungi To Interact Differently with Generalist and Specialist Plant Species in Gypsum Soils

Influence of Habitat and Climate Variables on Arbuscular Mycorrhizal Fungus Community Distribution, as Revealed by a Case Study of Facultative Plant Epiphytism under Semiarid Conditions

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