Contribution of dark septate fungi to the nutrient uptake and growth of rice plants

Vergara, Carlos; Araujo, Karla Emanuelle Campos; Alves, Luiziene Soares; Souza, Sônia Regina de; Santos, Leandro Azevedo; Santa–Catarina, Claudete; Silva, Krisle da; Pereira, Gilmara Maria Duarte; Xavier, Gustavo Ribeiro; Zilli, Jerri Édson

doi:10.1016/j.bjm.2017.04.010

Cited by 57 publications

(55 citation statements)

References 63 publications

(89 reference statements)

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“…On the other hand Ascomycota is known to include "dark septate endophytes" (DSEs) and has been observed in roots of plants that grow in stressful and nutrient-limited [52] and have shown a positive effect on plant growth [53,54] probably because of nitrogen mineralization and pathogen protection [55].…”

Section: Discussionmentioning

confidence: 99%

Fungal and Bacterial Microbiome Associated with the Rhizosphere of Native Plants from the Atacama Desert

et al. 2020

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The rhizosphere microbiome is key in survival, development, and stress tolerance in plants. Salinity, drought, and extreme temperatures are frequent events in the Atacama Desert, considered the driest in the world. However, little information of the rhizosphere microbiome and its possible contribution to the adaptation and tolerance of plants that inhabit the desert is available. We used a high-throughput Illumina MiSeq sequencing approach to explore the composition, diversity, and functions of fungal and bacterial communities of the rhizosphere of Baccharis scandens and Solanum chilense native plants from the Atacama Desert. Our results showed that the fungal phyla Ascomycota and Basidiomycota and the bacterial phyla Actinobacteria and Proteobacteria were the dominant taxa in the rhizosphere of both plants. The linear discriminant analysis (LDA) effect size (LefSe) of the rhizosphere communities associated with B. scandens showed the genera Penicillium and Arthrobacter were the preferential taxa, whereas the genera Oidiodendron and Nitrospirae was the preferential taxa in S. chilense. Both plant showed similar diversity, richness, and abundance according to Shannon index, observed OTUs, and evenness. Our results indicate that there are no significant differences (p = 0.1) between the fungal and bacterial communities of both plants, however through LefSe, we find taxa associated with each plant species and the PCoA shows a separation between the samples of each species. This study provides knowledge to relate the assembly of the microbiome to the adaptability to drought stress in desert plants.

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Section: Discussionmentioning

confidence: 99%

Fungal and Bacterial Microbiome Associated with the Rhizosphere of Native Plants from the Atacama Desert

et al. 2020

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“…It has been suggested that DSEs mineralise proteins and peptides in the soil, making N more available for uptake by roots (Upson et al 2009). Although the reciprocal nutrient transport between DSEs and plants has been proven (Usuki and Narisawa 2007;Porras-Alfaro and Bayman 2011), and the contribution of DSEs to N uptake has been studied in detail (Usuki and Narisawa 2007;Upson et al 2009;Porras-Alfaro and Bayman 2011;Vergara et al 2017Vergara et al , 2018, the mechanisms behind the effects of those root colonisers on their hosts are not well understood. Generally, root-associated fungi can mobilise different nutrients and help the uptake of these nutrients by plants or bridge nutrient depletion zones and transport the nutrients via hyphae to the roots (Behie and Bidochka 2014;Souza et al 2015).…”

Section: Introductionmentioning

confidence: 99%

Impact of dark septate endophytes on tomato growth and nutrient uptake

Yakti

Kovács

Vági

et al. 2018

Plant Ecology & Diversity

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Background: Dark septate endophytes (DSEs) represent a form-group of ascomycetous fungi that inhabit the roots of a wide range of plant species, but our knowledge on their interaction with the host plants is still limited. Aims: This study was conducted to examine the effect of DSEs on the nutrition and growth of tomato (Solanum lycopersicum) in order to assess their potential application in horticultural plant production. Methods: The capacity of two model DSE species, Periconia macrospinosa and Cadophora sp. to mobilise different forms of N and P (organic and inorganic) was analysed, and an in vitro bio assay with tomato plantlets was applied to screen the compatibility of these fungi with the plant. Pot-culture experiments with and without compartments were conducted to study the effects of these DSEs on the growth and nutrient uptake of tomato plants grown with organic and inorganic N and P sources. Results: Periconia macrospinosa, but not Cadophora sp., increased the root and shoot biomass of tomato plants when organic nutrient resources were present, and both DSEs promoted shoot growth when cultivated with inorganic fertilisers. Analysis of N and P concentrations indicated that the growth response of tomato with inorganic fertilisation was not based on DSE-improved plant nutrition. However, P. macrospinosa improved N uptake from organic sources. Conclusion: The positive effects of DSEs seem to be due to nutrient mobilisation rather than to hyphal transport to the plant.

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“…Certain Ascomycota including DSE form mycorrhizae in plant roots and enhance plant nutrient uptake and growth [37,38]. Lin et al [39] found that Ascomycota, Basidiomycota, and Zygomycota strongly tolerated heavy metal contamination. Moreover, Proteobacteria, Actinobacteria, Chloro exi, Firmicutes, and Acidobacteria predominated in the licorice rhizosphere under drought stress regardless of DSE inoculation.…”

Section: Discussionmentioning

confidence: 99%

Variation of soil microbiome in licorice rhizosphere driven with inoculating dark septate endophytes under drought stress

He¹,

Wang²,

Hou³

et al. 2020

Preprint

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BackgroundDark septate endophytes (DSE) are facultative biotrophic ascomycetes that colonize plant roots either alone or with arbuscular mycorrhizal (AM) fungi. DSE may provide nutrients to their plant hosts and help them adapt to various abiotic and biotic stresses. DSE inoculation under drought stress increased the biomass, root exudates, and AM fungi in the licorice (Glycyrrhiza uralensis Fisch.) rhizosphere. We conducted a pot experiment to establish whether the responses of licorice to DSE inoculation under drought stress are caused by changes in the rhizosphere microbiome. Each pot was inoculated with either Acrocalymma vagum or Paraboeremia putaminum. One set of pots was inoculated with a sterile culture medium. All three DSE-treated and uninoculated pots were subjected either to a well-watered (70% field water capacity, FWC) or drought stress (30% FWC) water regime. Rhizosphere microbiome compositions were measured by Illumina MiSeq sequencing of the 16S and ITS2 rRNA genes.ResultsIn total, 1,278 fungal and 1,583 bacterial operational taxonomic units (OUTs) were obtained at a 97% sequence similarity level. Ascomycota were the predominant fungi and Proteobacteria, Actinobacteria, Chloroflexi and Firmicutes were the predominant bacteria. DSE inoculation and water regime significantly influenced the rhizosphere microbiome composition. However, the effects of DSE on the fungal community were greater than those on the bacterial community. Paraboeremia putaminum exerted a stronger impact on the licorice rhizosphere microbiome than Acrocalymma vagum under drought stress. The observed changes in edaphic factors (water condition, soil organic matter, available N, available P, and available K) caused by DSE inoculation could be explained by the variations in rhizosphere microbiome composition. A network analysis indicated that DSE inoculation augmented the relative abundance of beneficial symbiotrophic fungi and growth-promoting bacteria but diminished the relative abundance of pathogens in the licorice rhizosphere.ConclusionsThe present study showed that the licorice rhizosphere microbial community differed between the DSE-inoculated and uninoculated plants. DSE had a stronger influence on the fungal than on the bacterial rhizosphere community under drought stress. These give us the guidance to develop biofertilizers with DSE consortia to enhance the cultivation of medicinal plants by shaping soil microbial community structure in dryland agriculture.

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Contribution of dark septate fungi to the nutrient uptake and growth of rice plants

Cited by 57 publications

References 63 publications

Fungal and Bacterial Microbiome Associated with the Rhizosphere of Native Plants from the Atacama Desert

Fungal and Bacterial Microbiome Associated with the Rhizosphere of Native Plants from the Atacama Desert

Impact of dark septate endophytes on tomato growth and nutrient uptake

Variation of soil microbiome in licorice rhizosphere driven with inoculating dark septate endophytes under drought stress

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