High diversity of arbuscular mycorrhizal fungi in natural and anthropized sites of a Brazilian tropical dry forest (Caatinga)

Marinho, Frederico; Oehl, Fritz; Silva, Iolanda Ramalho da; Coyne, Danny; Veras, Joana Suassuna da Nóbrega; Maia, Leonor Costa

doi:10.1016/j.funeco.2018.11.014

Cited by 33 publications

(19 citation statements)

References 48 publications

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“…Neotropical dry forests are distinguished into 12 groups, based on the occurrence and frequency of their woody species (DRYFLOR et al 2016): (i) Mexico, (ii) Antilles, (iii) Central America-northern South America, (iv) northern inter-Andean valleys, (v) central inter-Andean valleys, (vi) central Andes coast, (vii) Tarapoto-Quillabamba, (viii) Apurimac-Mantaro, (ix) Piedmont, (x) Misiones, (xi) central Brazil, and (xii) Caatinga. For most of the floristic groups, no studies about mycorrhizal communities exist, with the exception of Mexico (i) (Aguilar-Fernandéz et al 2009, Carillo-Saucedo et al 2018, Guadarrama et al 2014 and Caatinga (xii) in Brazil (Sousa et al 2018, Marinho et al 2019, Teixeira-Rios et al 2018. All of these studies used spores to identify AMF, and based on that, the results show a high level of agreement with dominant representatives of the Glomeraceae and Acaulosporaceae.…”

Section: Introductionmentioning

confidence: 99%

Global AM fungi are dominating mycorrhizal communities in a tropical premontane dry forest in Laipuna, South Ecuador

Haug

Setaro²,

Suárez

2021

Mycol Progress

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Tropical dry forests are an intricate ecosystem with special adaptations to periods of drought. Arbuscular mycorrhizal fungi (AMF) are essential for plant survival in all terrestrial ecosystems but might be of even greater importance in dry forests as plant growth is limited due to nutrient and water deficiency during the dry season. Tropical dry forests in Ecuador are highly endangered, but studies about AMF communities are scarce. We investigated the AMF community of a premontane semi-deciduous dry forest in South Ecuador during the dry season. We estimated AMF diversity, distribution, and composition of the study site based on operational taxonomic units (OTUs) and compared the results to those from the tropical montane rainforest and páramo in South Ecuador. OTU delimitation was based on part of the small ribosomal subunit obtained by cloning and Sanger sequencing. Nearly all OTUs were Glomeraceae. The four frequent OTUs were Glomus, and comparison with the MaarjAM database revealed these to be globally distributed with a wide range of ecological adaptations. Several OTUs are shared with virtual taxa from dry forests in Africa. Ordination analysis of AMF communities from the tropical dry and montane rainforests in South Ecuador revealed a unique AMF community in the dry forest with only few overlapping OTUs. Most OTUs that were found in both dry and rainforests and on the two continents were globally distributed Glomus.

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Section: Introductionmentioning

confidence: 99%

Global AM fungi are dominating mycorrhizal communities in a tropical premontane dry forest in Laipuna, South Ecuador

Haug

Setaro²,

Suárez

2021

Mycol Progress

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“…The way the different AMF act on the production of extraradicular hyphae and glomalin depends on the physiology and the interaction of AMF with the host plant, allowing a better understanding of the functions that AMF exert in the soil (Hart;Reader, 2002;Oehl et al, 2006;Singh et al, 2018;Marinho et al, 2019). In another study, it was also verified that the effect of AMF should be included in the interpretation of soil aggregation under a "multifunctional" perspective of the ecology of this group of fungi (Rillig;Mummey, 2006;Carneiro et al, 2015).…”

Section: Resultsmentioning

confidence: 94%

“…The biological activity excerts essential function in the process of aggregate formation and soil structural stability. Among the groups of microorganisms that play important functions in the construction of the soil structure are the arbuscular mycorrhizal fungi (AMF), which act in the formation and stabilization of the aggregates, besides contributing in terms of nutritional benefits, support to diverse stresses and promotion of growth to the plants in different phytophysiognomies (Rubin;Stürmer, 2015;Zheng;Singh;Ghosh, 2018;Marinho et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Do different arbuscular mycorrhizal fungi affect the formation and stability of soil aggregates?

et al. 2019

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Soil structure, which is defined by the arrangement of the particles and the porous space forming aggregates, is one of the most important properties of the soil. Among the biological factors that influence the formation and stabilization of soil aggregates, arbuscular mycorrhizal fungi (AMF) are distinguished due to extrarradicular hyphae and glomalin production. In this context, the objective of this study was to evaluate different AMF (Acaulospora colombiana, Acaulospora longula, Acaulospora morrowiae, Paraglomus occultum and Gigaspora margarita) associated with Urochloa brizantha (A. Rich.) Stapf on soil aggregate stability. The study was conducted in a completely randomized design, using an Oxisol and autoclaved sand 2:1 (v/v), with seven treatments: five AMF; and treatments with plants without inoculation and with only the soil, with 5 replicates. The experiment was conducted during 180 days and the following variables were evaluated: mycelium total length (TML); production of easily extractable glomalin-related soil protein (GRSP) in the soil and aggregate classes; stability of the dry and immersed in water aggregates through the mean geometric diameter (MGD) and the mean weighted diameter (MWD) of aggregates; and the soil aggregate stability index (ASI). It was observed that the inoculation favored soil aggregation, with a high incidence of A. colombiana, which presented the highest MGD, TML and GRSP production in the aggregates with Ø>2.0mm and for A. colombiana and A. morrowiae in the aggregates with Ø<0.105 mm, when compared to the treatment without inoculation. These results show that there is a distinction between the effects of different AMF on the formation and stability of soil aggregates.

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“…Also, when prospecting micro-propagation efforts of bamboo, the local AMF community should be taken into account, as local and specific mycorrhizal fungi may have better results on plant growth and survival than non-local and non-specific mycorrhizal fungi (Marín et al 2018); this specificity may be reflected on this study, as the AMF genus Sclerocystis was found in only one rhizospheric soil sample of A. verticillatum (Table 2). The northern and central areas of Brazil have been extremely understudied in terms of mycorrhizal ecology and biodiversity (Bueno et al 2017), albeit noticeable exceptions (de Assis et al 2018;Marinho et al 2019), most research has been concentrated in natural and agricultural ecosystems of the southern part of the country (Bueno et al 2017;Davison et al 2015). More studies on mycorrhizal diversity are needed to fill these knowledge gaps in the northern part of Brazil, in particular on species with a very high commercial interest as bamboo, where very little mycorrhizal research has been conducted.…”

Section: Discussionmentioning

confidence: 99%

Arbuscular Mycorrhizal Fungi Associated with Bamboo Under Cerrado Brazilian Vegetation

Moura

Souza

Vieira

et al. 2019

J Soil Sci Plant Nutr

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Most studies on bamboo have evaluated their commercial use but few have investigated their associated arbuscular mycorrhizal fungi (AMF). These symbiont fungi are fundamental on plant growth, nutrient cycling, biodiversity maintenance, etc., particularly on acidic/dystrophic soils as those of the Brazilian Cerrado. This study aimed to characterize the community composition and ecological interactions of AMF associated with the bamboo species Actinocladum verticillatum and Bambusa vulgaris vittata, under Cerrado vegetation in central Brazil. Roots and rhizospheric soil samples of A. verticillatum and B. vulgaris vittata were collected on 12 plots in the Gurupi (Tocantis state) and Porangatu (Goiás state) microregions. The roots' mycorrhizal colonization rate, rhizospheric soil' spore density, and the associated AMF genera were evaluated. There were no differences in the radical mycorrhizal colonization rates among the two bamboo species, although B. vulgaris vittata showed higher spore density than A. verticillatum. The genera Acaulospora, Claroideglomus, Diversispora, Scutellospora, Glomus, and Gigaspora were identified in both bamboo species, while Sclerocystis was present only on A. verticillatum. The genera Acaulospora, Diversispora, and Glomus were frequently found together. This study may be a first step to future AMF-based bamboo micropropagation efforts in the Cerrado Brazilian vegetation.

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High diversity of arbuscular mycorrhizal fungi in natural and anthropized sites of a Brazilian tropical dry forest (Caatinga)

Cited by 33 publications

References 48 publications

Global AM fungi are dominating mycorrhizal communities in a tropical premontane dry forest in Laipuna, South Ecuador

Global AM fungi are dominating mycorrhizal communities in a tropical premontane dry forest in Laipuna, South Ecuador

Do different arbuscular mycorrhizal fungi affect the formation and stability of soil aggregates?

Arbuscular Mycorrhizal Fungi Associated with Bamboo Under Cerrado Brazilian Vegetation

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