Full Text Journal Articles by
Author Martti Vasar

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Different wheat cultivars exhibit variable responses to inoculation with arbuscular mycorrhizal fungi from organic and conventional farms.

David García de León, Tanel Vahter, Martin Zobel, Mati Koppel, Liina Edesi, John Davison, Saleh Al-Quraishy, Wael N Hozzein, Mari Moora, Jane Oja, Martti Vasar, Maarja Öpik,

The present study aimed to investigate the effects of arbuscular mycorrhizal (AM) fungal communities originating from organic and conventional agriculture on wheat growth and yield. Six different spring wheat cultivars released in different years in north and central European countries were considered. We hypothesised that AM fungal inoculum collected from ... Read more >>

PLoS ONE (PloS one)
[2020, 15(5):e0233878]

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Distinct arbuscular mycorrhizal fungal communities associate with different manioc landraces and Amazonian soils.

Clara P Peña-Venegas, Thomas W Kuyper, John Davison, Teele Jairus, Martti Vasar, Tjeerd Jan Stomph, Paul C Struik, Maarja Öpik,

Manioc (Manihot esculenta Crantz) is an important tropical crop that depends on arbuscular mycorrhizal (AM) association for its nutrition. However, little is known about the richness and species composition of AM fungal communities associating with manioc and possible differences across soils and manioc landraces. We studied the diversity and composition ... Read more >>

Mycorrhiza (Mycorrhiza)
[2019, 29(3):263-275]

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Root colonizing and soil borne communities of arbuscular mycorrhizal fungi differ among soybean fields with contrasting historical land use

Valeria Soledad Faggioli, Fernanda Covacevich, Gabriel Grilli, Maarja Öpik, Marta Noemí Cabello, Martti Vasar,

Arbuscular mycorrhizal fungi (AMF) are a key component of soil microbiota in natural and anthropogenic ecosystems. Even though soil type and climate conditioned land uses in the past, soybean cultivation has overrode such limitations and replaced the earlier diverse agro- and natural ecosystems in many countries of South America. We ... Read more >>

(Agriculture, ecosystems & environment.)
[2019, 269:174-182]

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Belowground plant parts are crucial for comprehensively estimating total plant richness in herbaceous and woody habitats.

Sabrina Träger, Maarja Öpik, Martti Vasar, Scott D Wilson,

Most studies consider aboveground plant species richness as a representative biodiversity measure. This approach inevitably assumes that the partitioning of total plant species richness into above- and belowground components is constant or at least consistent within and across vegetation types. However, with studies considering belowground plant richness still scarce and ... Read more >>

Ecology (Ecology)
[2019, 100(2):e02575]

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Non-random association patterns in a plant-mycorrhizal fungal network reveal host-symbiont specificity.

Siim-Kaarel Sepp, John Davison, Teele Jairus, Martti Vasar, Mari Moora, Martin Zobel, Maarja Öpik,

Arbuscular mycorrhizal (AM) fungi are obligate plant symbionts that have important functions in most terrestrial ecosystems, but there remains an incomplete understanding of host-fungus specificity and the relationships between species and functional groups of plants and AM fungi. Here, we aimed to provide a comprehensive description of plant-AM fungal interactions ... Read more >>

Mol. Ecol. (Molecular ecology)
[2019, 28(2):365-378]

Cited: 1 time

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Microbial island biogeography: isolation shapes the life history characteristics but not diversity of root-symbiotic fungal communities.

John Davison, Mari Moora, Maarja Öpik, Leho Ainsaar, Marc Ducousso, Inga Hiiesalu, Teele Jairus, Nancy Johnson, Philippe Jourand, Rein Kalamees, Kadri Koorem, Jean-Yves Meyer, Kersti Püssa, Ülle Reier, Meelis Pärtel, Marina Semchenko, Anna Traveset, Martti Vasar, Martin Zobel,

Island biogeography theory is one of the most influential paradigms in ecology. That island characteristics, including remoteness, can profoundly modulate biological diversity has been borne out by studies of animals and plants. By contrast, the processes influencing microbial diversity in island systems remain largely undetermined. We sequenced arbuscular mycorrhizal (AM) ... Read more >>

ISME J (The ISME journal)
[2018, 12(9):2211-2224]

Cited: 3 times

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Anthropogenic disturbance equalizes diversity levels in arbuscular mycorrhizal fungal communities

David García de León, Cherdchai Phosri, Huyuan Feng, Inga Hiiesalu, John Davison, Kadri Koorem, Maarja Öpik, Mari Moora, Martin Zobel, Martti Vasar, Siim‐Kaarel Sepp, Teele Jairus, Yongjun Liu,

The arbuscular mycorrhizal (AM) symbiosis is a key plant–microbe interaction in sustainable functioning ecosystems. Increasing anthropogenic disturbance poses a threat to AM fungal communities worldwide, but there is little empirical evidence about its potential negative consequences. In this global study, we sequenced AM fungal DNA in soil samples collected from ... Read more >>

(Global change biology.)
[2018, 24(6):2649-2659]

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Anthropogenic disturbance equalizes diversity levels in arbuscular mycorrhizal fungal communities.

David García de León, John Davison, Mari Moora, Maarja Öpik, Huyuan Feng, Inga Hiiesalu, Teele Jairus, Kadri Koorem, Yongjun Liu, Cherdchai Phosri, Siim-Kaarel Sepp, Martti Vasar, Martin Zobel,

The arbuscular mycorrhizal (AM) symbiosis is a key plant-microbe interaction in sustainable functioning ecosystems. Increasing anthropogenic disturbance poses a threat to AM fungal communities worldwide, but there is little empirical evidence about its potential negative consequences. In this global study, we sequenced AM fungal DNA in soil samples collected from ... Read more >>

Glob Chang Biol (Global change biology)
[2018, 24(6):2649-2659]

Cited: 2 times

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Dynamics of arbuscular mycorrhizal fungal community structure and functioning along a nitrogen enrichment gradient in an alpine meadow ecosystem.

Shengjing Jiang, Yongjun Liu, Jiajia Luo, Mingsen Qin, Nancy Collins Johnson, Maarja Öpik, Martti Vasar, Yuxing Chai, Xiaolong Zhou, Lin Mao, Guozhen Du, Lizhe An, Huyuan Feng,

Nitrogen (N) availability is increasing dramatically in many ecosystems, but the influence of elevated N on the functioning of arbuscular mycorrhizal (AM) fungi in natural ecosystems is not well understood. We measured AM fungal community structure and mycorrhizal function simultaneously across an experimental N addition gradient in an alpine meadow ... Read more >>

New Phytol. (The New phytologist)
[2018, 220(4):1222-1235]

Cited: 4 times

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Soybean cultivation supports a diverse arbuscular mycorrhizal fungal community in central Argentina

David García de León, Juan José Cantero, Mari Moora, Maarja Öpik, John Davison, Martti Vasar, Teele Jairus, Martin Zobel,

Arbuscular mycorrhizal (AM) symbiosis is a key plant-microbe interaction in sustainable ecosystems. Increasing land use intensity poses a threat to AM fungal communities, yet little is known of the impact of agricultural land use on AM fungal communities in many regions and cultivation types. The last few decades have witnessed ... Read more >>

Agric., Ecosyst. Environ., Appl. Soil Ecol. (Applied soil ecology : a section of Agriculture, Ecosystems & Environment)
[2018, 124:289-297]

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Effects of land use on arbuscular mycorrhizal fungal communities in Estonia.

Siim-Kaarel Sepp, Teele Jairus, Martti Vasar, Martin Zobel, Maarja Öpik,

Arbuscular mycorrhizal (AM) fungal communities vary across habitat types, as well as across different land use types. Most relevant research, however, has focused on agricultural or other severely human-impacted ecosystems. Here, we compared AM fungal communities across six habitat types: calcareous grassland, overgrown ungrazed calcareous grassland, wooded meadow, farmyard lawn, ... Read more >>

Mycorrhiza (Mycorrhiza)
[2018, 28(3):259-268]

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The role of plant mycorrhizal type and status in modulating the relationship between plant and arbuscular mycorrhizal fungal communities.

Lena Neuenkamp, Mari Moora, Maarja Öpik, John Davison, Maret Gerz, Minna Männistö, Teele Jairus, Martti Vasar, Martin Zobel,

Interactions between communities of plants and arbuscular mycorrhizal (AM) fungi shape fundamental ecosystem properties. Experimental evidence suggests that compositional changes in plant and AM fungal communities should be correlated, but empirical data from natural ecosystems are scarce. We investigated the dynamics of covariation between plant and AM fungal communities during ... Read more >>

New Phytol. (The New phytologist)
[2018, 220(4):1236-1247]

Cited: 4 times

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More bang for the buck? Can arbuscular mycorrhizal fungal communities be characterized adequately alongside other fungi using general fungal primers?

Ylva Lekberg, Martti Vasar, Lorinda S Bullington, Siim-Kaarel Sepp, Pedro M Antunes, Rebecca Bunn, Beau G Larkin, Maarja Öpik,

New Phytol. (The New phytologist)
[2018, 220(4):971-976]

Cited: 3 times

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Plant traits determine the phylogenetic structure of arbuscular mycorrhizal fungal communities.

Álvaro López-García, Sara Varela-Cervero, Martti Vasar, Maarja Öpik, José M Barea, Concepción Azcón-Aguilar,

Functional diversity in ecosystems has traditionally been studied using aboveground plant traits. Despite the known effect of plant traits on the microbial community composition, their effects on the microbial functional diversity are only starting to be assessed. In this study, the phylogenetic structure of arbuscular mycorrhizal (AM) fungal communities associated ... Read more >>

Mol. Ecol. (Molecular ecology)
[2017, 26(24):6948-6959]

Cited: 6 times

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Increased sequencing depth does not increase captured diversity of arbuscular mycorrhizal fungi.

Martti Vasar, Reidar Andreson, John Davison, Teele Jairus, Mari Moora, Maido Remm, J P W Young, Martin Zobel, Maarja Öpik,

The arrival of 454 sequencing represented a major breakthrough by allowing deeper sequencing of environmental samples than was possible with existing Sanger approaches. Illumina MiSeq provides a further increase in sequencing depth but shorter read length compared with 454 sequencing. We explored whether Illumina sequencing improves estimates of arbuscular mycorrhizal ... Read more >>

Mycorrhiza (Mycorrhiza)
[2017, 27(8):761-773]

Cited: 4 times

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Land-use intensity and host plant simultaneously shape the composition of arbuscular mycorrhizal fungal communities in a Mediterranean drained peatland.

Valentina Ciccolini, Laura Ercoli, John Davison, Martti Vasar, Maarja Öpik, Elisa Pellegrino,

Land-use change is known to be a major threat to biodiversity and ecosystem services in Mediterranean areas. However, the potential for different host plants to modulate the effect of land-use intensification on community composition of arbuscular mycorrhizal fungi (AMF) is still poorly understood. To test the hypothesis that low land-use ... Read more >>

FEMS Microbiol. Ecol. (FEMS microbiology ecology)
[2016, 92(12):]

Cited: 3 times

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Diversity of root-associated arbuscular mycorrhizal fungal communities in a rubber tree plantation chronosequence in Northeast Thailand.

Laetitia Herrmann, Didier Lesueur, Lambert Bräu, John Davison, Teele Jairus, Henri Robain, Agnès Robin, Martti Vasar, Wanpen Wiriyakitnateekul, Maarja Öpik,

Rubber tree (Hevea brasiliensis) is of major economic importance in Southeast Asia and for small land holders in Thailand in particular. Due to the high value of latex, plantations are expanding into unsuitable areas, such as the northeast province of Thailand where soil fertility is very low and therefore appropriate ... Read more >>

Mycorrhiza (Mycorrhiza)
[2016, 26(8):863-877]

Cited: 4 times

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Hierarchical assembly rules in arbuscular mycorrhizal (AM) fungal communities

John Davison, Maarja Öpik, Mari Moora, Martin Zobel, Martti Vasar, Teele Jairus,

Processes controlling the assembly of microorganism communities are poorly understood. In taxonomic groups where many organisms are only described from environmental DNA, phylogenetic relationships may provide a proxy for functional attributes. We used a null model approach to compare the phylogenetic diversity of arbuscular mycorrhizal (AM) fungal communities coexisting within ... Read more >>

Soil Biol. Biochem. (Soil biology & biochemistry)
[2016, 97:63-70]

Cited: 4 times

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Sequence variation in nuclear ribosomal small subunit, internal transcribed spacer and large subunit regions of Rhizophagus irregularis and Gigaspora margarita is high and isolate-dependent.

Odile Thiéry, Martti Vasar, Teele Jairus, John Davison, Christophe Roux, Paula-Ann Kivistik, Andres Metspalu, Lili Milani, Ülle Saks, Mari Moora, Martin Zobel, Maarja Öpik,

Arbuscular mycorrhizal (AM) fungi are known to exhibit high intra-organism genetic variation. However, information about intra- vs. interspecific variation among the genes commonly used in diversity surveys is limited. Here, the nuclear small subunit (SSU) rRNA gene, internal transcribed spacer (ITS) region and large subunit (LSU) rRNA gene portions were ... Read more >>

Mol. Ecol. (Molecular ecology)
[2016, 25(12):2816-2832]

Cited: 17 times

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Symbiont dynamics during ecosystem succession: co-occurring plant and arbuscular mycorrhizal fungal communities.

David García de León, Mari Moora, Maarja Öpik, Lena Neuenkamp, Maret Gerz, Teele Jairus, Martti Vasar, C Guillermo Bueno, John Davison, Martin Zobel,

Although mycorrhizas are expected to play a key role in community assembly during ecological succession, little is known about the dynamics of the symbiotic partners in natural systems. For instance, it is unclear how efficiently plants and arbuscular mycorrhizal (AM) fungi disperse into early successional ecosystems, and which, if either, ... Read more >>

FEMS Microbiol. Ecol. (FEMS microbiology ecology)
[2016, 92(7):]

Cited: 12 times

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AM fungal communities inhabiting the roots of submerged aquatic plant Lobelia dortmanna are diverse and include a high proportion of novel taxa.

Mari Moora, Maarja Öpik, John Davison, Teele Jairus, Martti Vasar, Martin Zobel, R Lutz Eckstein,

While the arbuscular mycorrhizal (AM) symbiosis is known to be widespread in terrestrial ecosystems, there is growing evidence that aquatic plants also form the symbiosis. It has been suggested that symbiosis with AM fungi may represent an important adaptation for isoëtid plants growing on nutrient-poor sediments in oligotrophic lakes. In ... Read more >>

Mycorrhiza (Mycorrhiza)
[2016, 26(7):735-745]

Cited: 4 times

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Impact of alien pines on local arbuscular mycorrhizal fungal communities-evidence from two continents.

Antonio Gazol, Martin Zobel, Juan José Cantero, John Davison, Karen J Esler, Teele Jairus, Maarja Öpik, Martti Vasar, Mari Moora,

The introduction of alien plants can influence biodiversity and ecosystems. However, its consequences for soil microbial communities remain poorly understood. We addressed the impact of alien ectomycorrhizal (EcM) pines on local arbuscular mycorrhizal (AM) fungal communities in two regions with contrasting biogeographic histories: in South Africa, where no native EcM ... Read more >>

FEMS Microbiol. Ecol. (FEMS microbiology ecology)
[2016, 92(6):fiw073]

Cited: 8 times

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The composition of arbuscular mycorrhizal fungal communities differs among the roots, spores and extraradical mycelia associated with five Mediterranean plant species.

Sara Varela-Cervero, Martti Vasar, John Davison, José Miguel Barea, Maarja Öpik, Concepción Azcón-Aguilar,

Arbuscular mycorrhizal fungi (AMF) are essential constituents of most terrestrial ecosystems. AMF species differ in terms of propagation strategies and the major propagules they form. This study compared the AMF community composition of different propagule fractions - colonized roots, spores and extraradical mycelium (ERM) - associated with five Mediterranean plant ... Read more >>

Environ. Microbiol. (Environmental microbiology)
[2015, 17(8):2882-2895]

Cited: 24 times

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The composition of arbuscular mycorrhizal fungal communities in the roots of a ruderal forb is not related to the forest fragmentation process.

Gabriel Grilli, Carlos Urcelay, Leonardo Galetto, John Davison, Martti Vasar, Ülle Saks, Teele Jairus, Maarja Öpik,

Land-use changes and forest fragmentation have strong impact on biodiversity. However, little is known about the influence of new landscape configurations on arbuscular mycorrhizal fungal (AMF) community composition. We used 454 pyrosequencing to assess AMF diversity in plant roots from a fragmented forest. We detected 59 virtual taxa (VT; phylogenetically ... Read more >>

Environ. Microbiol. (Environmental microbiology)
[2015, 17(8):2709-2720]

Cited: 9 times

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Anthropogenic land use shapes the composition and phylogenetic structure of soil arbuscular mycorrhizal fungal communities.

Mari Moora, John Davison, Maarja Öpik, Madis Metsis, Ülle Saks, Teele Jairus, Martti Vasar, Martin Zobel,

Arbuscular mycorrhizal (AM) fungi play an important role in ecosystems, but little is known about how soil AM fungal community composition varies in relation to habitat type and land-use intensity. We molecularly characterized AM fungal communities in soil samples (n = 88) from structurally open (permanent grassland, intensive and sustainable ... Read more >>

FEMS Microbiol. Ecol. (FEMS microbiology ecology)
[2014, 90(3):609-621]

Cited: 26 times

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