scholarly journals Changes in an Arbuscular Mycorrhizal Fungi Community Along an Environmental Gradient

Plants ◽  
2020 ◽  
Vol 9 (1) ◽  
pp. 52 ◽  
Author(s):  
Vieira ◽  
Silva ◽  
Escobar ◽  
Silva ◽  
Moura ◽  
...  
Keyword(s):  
Arbuscular Mycorrhizal Fungi ◽  
Mycorrhizal Fungi ◽  
Environmental Gradient ◽  
Environmental Changes ◽  
Clay Content ◽  
Arbuscular Mycorrhizal ◽  
Additional Species ◽  
Field Samples ◽  
Determining Factors ◽  
Semi Arid Region

Gradual environmental changes are determining factors in the disposition of plants and associated organisms, such as arbuscular mycorrhizal fungi (AMF). The objective of this study was to evaluate the AMF species communities in a tropical semi-arid region of NE Brazil under decreasing clay content at a mountain top area forming a vegetative mosaic of dry forests, savanna-like shrubland and humid montane forests. Through field and trap culture samples, 80 species of AMF were identified belonging to 25 genera, of which Acaulospora and Glomus were the most representative. In general, representatives of the order Gigasporales were indicators of sites with lower clay content and showed greater abundance in these sites. As expected, less richness was found in the site with higher clay content, but there was no variation in the Shannon-Weaver index in the gradient studied. The areas showed different assemblies of AMF among the sites with higher and lower clay content, and the main factors structuring the species were carbon, clay and potential acidity. In addition, field samples and trap cultures showed different assemblies; through the use of cultures it was possible to detect additional species. Soil properties have been found to be determinants for the distribution of these microorganisms and further studies in different vegetation types can help to understand the ecological preferences of AMF species.

scholarly journals Arbuscular mycorrhizal fungi (Glomeromycota) of the Vistula Bar

2014 ◽  
Vol 37 (1-2) ◽  
pp. 39-62 ◽  
Author(s):  
Janusz Błaszkowski ◽  
Iwona Adamska ◽  
Beata Czerniawska
Keyword(s):  
Arbuscular Mycorrhizal Fungi ◽  
Mycorrhizal Fungi ◽  
Sand Dunes ◽  
Arbuscular Mycorrhizal ◽  
Fungal Species ◽  
Field Samples ◽  
North Eastern ◽  
Dry Soil ◽  
Soil Mixtures ◽  
Plant Families

The occurrence of arbuscular mycorrhizal fungi (AMF) of the, phylum <i>Glomeromycota</i> associated with plants of maritime sand dunes of the Vistula Bar localed in north-eastern Poland was investigated. The presence of AMF was revealed based on spores isolated from field-collected root-rhizosphere soil mixtures and two-cycle pot trap cultures established with parts of these mixtures. The mixtures came from under five species in four plant families. Spores of AMF occurred in 54.8% of the field samples and belonged to eight species. Additionally, culturing of root-soil mixtures in trap cultures revealed nine species and three undescribed morphotypes carlier not found in the field samples. Considering the number of records of species and morphotypes in the field samples and trap cultures, the fungal species most frequently occurring in dunes of the Vistula Bar is <i>Scutellospora dipurpurescens</i>, followed by <i>Archaeospora trappei, Glomus laccatum</i>, and <i>Scu. armeniaca</i>. The overall average spore abundance in the field samples is low (4.48, range O-3l in 100g dry soil). The ovcrall average species richness determined based on spores from both the field and trap cultures was 2 l and ranged from 0 lo 7 in 100g dry soil. The plant harbouring the highest number of species of AMF was <i>Festuca rubra</i>. Of the maritime dune sites of Poland examined to date, the species composition of AMF of the Vistula Bar is most similar to that of the Słowiński National Park. When the comparisons included 15 maritime dune areas located outside Poland, the highest similarity occurred in the Vistula Bar/Canada comparison.

scholarly journals Arbuscular mycorrhizal fungi activity in Haplic Luvisol on the semi-arid region of Pernambuco Brazil

2017 ◽  
Vol 60 (2) ◽  
pp. 185-191
Author(s):  
Emmanuella Vila Nova da Silva ◽  
Cláudia Elizabete Pereira de Lima ◽  
Wagner da Silva Oliveira ◽  
José de Paula Oliveira ◽  
Adália Cavalcanti do Espírito Santo Mergulhão ◽  
...  
Keyword(s):  
Arbuscular Mycorrhizal Fungi ◽  
Mycorrhizal Fungi ◽  
Arid Region ◽  
Arbuscular Mycorrhizal ◽  
Semi Arid Region ◽  
Semi Arid

scholarly journals Species richness and root colonization of arbuscular mycorrhizal fungi in Syngonanthus elegans, an endemic and threatened species from the Cerrado domain in Brazil

2016 ◽  
Vol 40 (3) ◽  
pp. 326-336 ◽  
Author(s):  
Hesmael Antonio Orlandi Costa ◽  
Sidney Luiz Stürmer ◽  
Carla Ragonezi ◽  
Paulo Henrique Grazziotti ◽  
Danielle Cristina Fonseca Santos Grazziotti ◽  
...  
Keyword(s):  
Species Richness ◽  
Arbuscular Mycorrhizal Fungi ◽  
Threatened Species ◽  
Mycorrhizal Fungi ◽  
Arbuscular Mycorrhizal ◽  
Mycorrhizal Colonization ◽  
Additional Species ◽  
Wide Range ◽  
Amf Communities ◽  
Glomus Sp

ABSTRACT Syngonanthus elegans is an endangered plant species occurring in the Brazilian Cerrado whose interaction with arbuscular mycorrhizal fungi (AMF) is poorly understood. The aim of this work was to evaluate the occurrence of AMF species and mycorrhizal colonization of S. elegans in two sampling areas named "Soberbo" stream (Soberbo) and "Parque Nacional das Sempre-Vivas" (Park), both found in Diamantina-MG, Brazil. In each area, one plot (100 x 100 m) was established, and roots and soil samples near the roots were collected from 10 plants in each plot. Further sampling included three specimens each of Loudetiopsis chrysothrix and Xyris sp.. Typical mycorrhizal colonization structures were observed in S. elegans roots, and colonization was measured at 75%. Considering both sites and all three hosts, 26 AMF species were recovered, 8 of which were identified only at the genus level. Glomus sp. 1, Scutellospora pernambucana, Acaulospora cavernata and Acaulospora mellea were classified as dominant in both areas. Other species were also considered dominant, including Glomus sp. 4 in Soberbo and Dentiscutata biornata and Gigaspora albida in Park. Trap cultures revealed the presence of seven additional species. For S. elegans, AMF species richness was slightly higher in Park than in Soberbo. Simpson diversity and evenness were slightly higher in Soberbo for S. elegans-associated AMF communities. Overall, S. elegans is highly colonized by arbuscular mycorrhizal fungi and is associated with a wide range of AMF species in the field, suggesting that this association is important for the establishment and survival of this threatened species. Some of the observed species may be new to science.

scholarly journals Precipitation shapes communities of arbuscular mycorrhizal fungi in Tibetan alpine steppe

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
Jing Zhang ◽  
Fang Wang ◽  
Rongxiao Che ◽  
Ping Wang ◽  
Hanke Liu ◽  
...  
Keyword(s):  
Arbuscular Mycorrhizal Fungi ◽  
Community Composition ◽  
Plant Species ◽  
Mycorrhizal Fungi ◽  
Environmental Changes ◽  
Regional Scale ◽  
Arbuscular Mycorrhizal ◽  
Future Climate Change ◽  
Alpine Steppe ◽  
Amf Communities

Abstract Tibetan Plateau is one of the largest and most unique habitats for organisms including arbuscular mycorrhizal fungi (AMF). However, it remains unclear how AMF communities respond to key environmental changes in this harsh environment. To test if precipitation could be a driving force in shaping AMF community structures at regional scale, we examined AMF communities associated with dominant plant species along a precipitation gradient in Tibetan alpine steppe. Rhizosphere soils were collected from five sites with annual precipitation decreasing from 400 to 50 mm. A total of 31 AMF operational taxonomic units (OTUs) were identified. AMF community composition varied significantly among sites, whereas AMF community composition did not vary among plant species. Path analysis revealed that precipitation directly affected AMF hyphal length density, and indirectly influenced AMF species richness likely through the mediation of plant coverage. Our results suggested that water availability could drive the changes of AMF communities at regional scale. Given the important roles AMF could play in the dynamics of plant communities, exploring the changes of AMF communities along key environmental gradients would help us better predict the ecosystem level responses of the Tibetan vegetation to future climate change.

Diversity of arbuscular mycorrhizal fungi along an environmental gradient in the Brazilian semiarid

2014 ◽  
Vol 84 ◽  
pp. 166-175 ◽  
Author(s):  
Iolanda Ramalho da Silva ◽  
Catarina Maria Aragão de Mello ◽  
Reginaldo Alves Ferreira Neto ◽  
Danielle Karla Alves da Silva ◽  
André Laurênio de Melo ◽  
...  
Keyword(s):  
Arbuscular Mycorrhizal Fungi ◽  
Mycorrhizal Fungi ◽  
Environmental Gradient ◽  
Arbuscular Mycorrhizal ◽  
Brazilian Semiarid
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