Diversity of arbuscular mycorrhizal fungi in the Brazilian's Cerrado and in soybean under conservation and conventional tillage

Pontes, Juliana Souza de; Oehl, Fritz; Pereira, Cícero Donizete; Machado, Cynthia Torres de Toledo; Coyne, Danny; Silva, Danielle Karla Alves da; Maia, Leonor Costa

doi:10.1016/j.apsoil.2017.04.023

Cited by 51 publications

(24 citation statements)

References 63 publications

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“…AMF diversity was not affected by fertilization. This does not agree with previous studies that showed that soil AMF diversity decreases after fertilization ( de Pontes et al., 2017 , Tian et al., 2013 , Wang et al., 2011 ). The influence of soil fertilizer on the diversity of AMF remains controversial, and the inconsistency of these results may be attributed to the application rate of fertilization ( Mathimaran et al., 2005 ), soil properties ( Verbruggen et al., 2012 ) and host plant species ( Gosling et al., 2013 ).…”

Section: Discussioncontrasting

confidence: 99%

N-P fertilization did not reduce AMF abundance or diversity but alter AMF composition in an alpine grassland infested by a root hemiparasitic plant

Wang¹,

Sui²,

Liu³

et al. 2018

Plant Diversity

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Fertilization has been shown to have suppressive effects on arbuscular mycorrhizal fungi (AMF) and root hemiparasites separately in numerous investigations, but its effects on AMF in the presence of root hemiparasites remain untested. In view of the contrasting nutritional effects of AMF and root hemiparasites on host plants, we tested the hypothesis that fertilization may not show strong suppressive effects on AMF when a plant community was infested by abundant hemiparasitic plants. Plants and soil samples were collected from experimental field plots in Bayanbulak Grassland, where N and P fertilizers had been applied for three continuous years for control against a spreading root hemiparasite, Pedicularis kansuensis. Shoot and root biomass of each plant functional group were determined. Root AMF colonization levels, soil spore abundance, and extraradical hyphae length density were measured for three soil depths (0–10 cm, 10–20 cm, 20–30 cm). Partial 18S rRNA gene sequencing was used to detect AMF diversity and community composition. In addition, we analyzed the relationship between relative abundance of different AMF genera and environmental factors using Spearman's correlation method. In contrast to suppressive effects reported by many previous studies, fertilization showed no significant effects on AMF root colonization or AMF species diversity in the soil. Instead, a marked increase in soil spore abundance and extraradical hyphae length density were observed. However, fertilization altered relative abundance and AMF composition in the soil. Our results support the hypothesis that fertilization does not significantly influence the abundance and diversity of AMF in a plant community infested by P. kansuensis.

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Section: Discussioncontrasting

confidence: 99%

N-P fertilization did not reduce AMF abundance or diversity but alter AMF composition in an alpine grassland infested by a root hemiparasitic plant

Wang¹,

Sui²,

Liu³

et al. 2018

Plant Diversity

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“…In addition, AMF communities in maize crops varied distinctly, indicating that tillage practice altered the AMF communities in maize crops (Fig. 6), in partial agreement with previous data 73,74 . Moreover, tillage management induced more changes to the AMF communities in maize roots than the type of cover crops.…”

Section: Influence Of Tillage and Cover Crops On Shifts In Amf Communsupporting

confidence: 90%

Amplicon sequencing analysis of arbuscular mycorrhizal fungal communities colonizing maize roots in different cover cropping and tillage systems

Higo

Tatewaki

Iida

et al. 2020

Sci Rep

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Our understanding regarding the influence of intensive agricultural practices, including cover cropping and tillage, on communities of arbuscular mycorrhizal fungi (AMF) is lacking. This would prove to be an obstacle in the improvement of current maize (Zea mays L.) production. therefore, using amplicon sequencing, we aimed to clarify how AMF communities and their diversity in maize roots vary under different cover cropping systems and two types of tillage (rotary and no tillage). Two kinds of cover crops (hairy vetch and brown mustard) and fallow treatments were established with rotary or no tillage in rotation with maize crops. Tillage and no tillage yielded a set of relatively common AMF operational taxonomic units (OTUs) in the maize crops, representing 78.3% of the total OTUs. The percentage of maize crop OTUs that were specific to only tillage and no tillage were 9.6% and 12.0%, respectively. We found that tillage system significantly altered the AMF communities in maize roots. However, the AMF communities of maize crops among cover cropping treatments did not vary considerably. Our findings indicate that compared with cover cropping, tillage may shape AMF communities in maize more strongly. Growing cover crops and practicing conservation tillage are agricultural practices worldwide that have been recommended to promote soil fertility. In particular, Williams et al. 1 reported that conservation tillage, including reduced or no tillage, modifies water-holding capacity and structure of soil in conservative agricultural systems. In general, conservation tillage can improve soil aggregation, increase the amount of soil organic carbon in the surface layer, and reduce erosion 2,3. Moreover, conservation tillage enhances soil microbial diversity and the abundance of beneficial functional soil microorganisms 3,4. The soil microbial communities stimulated by conservation tillage can play important roles in soil aggregation, soil carbon sequestration, and soil nutrition; improve water use efficiencies; and influence crop yields 5,6. The practice of cover cropping potentially reduces soil and wind erosion 7 , enhances soil organic matter 8 , inhibits weed establishment 9 , and increases the abundance and activity of arbuscular mycorrhizal fungi (AMF) 10. Indeed, crops with AMF have a greater capacity to take up phosphorus (P), zinc (Zn), and water 10 than crops without AMF. This greater capacity generally results in robust crop growth under conditions of limited nutrient availability or drought. AMF also contribute to increasing plant resistance against pathogens and help make crops generally healthier 11-13. AMF also contribute to crop health indirectly because of their effects on soil processes in agricultural settings 14,15. In particular, they can contribute to soil health, soil aggregate formation, and soil stability by increasing the soil's nutrient cycling and organic matter content 16,17. However, certain agricultural practices have negative influences on AMF abundance and functions 18,19. For example, convent...

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“…Glomerospores have key characteristics for identification at the species level, and many studies on AMF have been successfully conducted based on morphological identification [61,62]. In the present study, a total of 35 AMF species were detected via spore morphology in the planted forest, compared with 27 AMF species found in a tropical rainforest [57], 58 AMF species observed in the Brazilian Atlantic forest [63], and 25 AMF species noted in a subtropical forest [29].…”

Section: Discussionmentioning

confidence: 56%

Arbuscular Mycorrhizal Fungi Associated with Tree Species in a Planted Forest of Eastern China

Wang

Zhang

et al. 2019

Forests

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Arbuscular mycorrhizal fungi (AMF) play an important role in the establishment and maintenance of plant communities in forest ecosystems. Most previous studies about AMF have been conducted in natural forests, and little attention has been paid to trees in planted forests. This study investigated AMF associated with tree species and the relationships between edaphic factors and AMF communities in a planted forest of eastern China. We found high total AMF colonization rates in the roots of Carya illinoensis (Wangenh.) K. Koch, Zelkova serrata (Thunb.) Makinoz, Taxodium ‘zhongshansha’, Eucommia ulmoides Oliv., and Elaeagnus pungens Thunb., ranging from 62.07% to 100%, indicating that AMF can establish effective symbiotic relationships with these tree species. The AMF colonization rate was significantly and negatively correlated with soil phosphorus, while AMF colonization intensity was significantly and negatively correlated with soil moisture content, total carbon, and organic matter content. Spore density was in the range of 4.38 to 76.38 spores per g soil. In total, 35 AMF species from 10 genera were identified. Glomus and Acaulospora were the dominant genera. Acaulospora foveata and Septoglomus constrictum were the dominant species. AMF communities differed among the tree species and were closely related to edaphic factors, and AMF diversity was significantly related to soil carbon and pH. Our results revealed the colonization, community, and diversity of AMF associated with tree species, as well as their relationships with edaphic factors, in planted forests. Our findings can be used to provide insight on the utilization and management of AMF to maintain sustainable management of planted forests.

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Diversity of arbuscular mycorrhizal fungi in the Brazilian's Cerrado and in soybean under conservation and conventional tillage

Cited by 51 publications

References 63 publications

N-P fertilization did not reduce AMF abundance or diversity but alter AMF composition in an alpine grassland infested by a root hemiparasitic plant

N-P fertilization did not reduce AMF abundance or diversity but alter AMF composition in an alpine grassland infested by a root hemiparasitic plant

Amplicon sequencing analysis of arbuscular mycorrhizal fungal communities colonizing maize roots in different cover cropping and tillage systems

Arbuscular Mycorrhizal Fungi Associated with Tree Species in a Planted Forest of Eastern China

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