Dark Septate Endophytes (DSE) in Boreal and Subarctic Forests

2018 ◽  
pp. 105-117 ◽  
Author(s):  
Anna Liisa Ruotsalainen
Keyword(s):  
Dark Septate Endophytes

scholarly journals Temporal and Spatial Dynamics of Dark Septate Endophytes in the Roots of Lycium ruthenicum in the Desert Region of Northwest China

Agronomy ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 648
Author(s):  
Li Han ◽  
Jingxin Shi ◽  
Chao He ◽  
Xueli He
Keyword(s):  
Species Diversity ◽  
Spatial Dynamics ◽  
Northwest China ◽  
Dark Septate Endophytes ◽  
Desert Ecosystems ◽  
Lycium Ruthenicum ◽  
Different Seasons ◽  
Application Potential ◽  
First Time ◽  
Hydrolyzable Nitrogen

With the intensification of desertification in northwest China, drought has become a serious environmental problem restricting plant growth and ecological restoration. Recently, dark septate endophytes (DSEs) have attracted more attention because of their ability to improve plants’ resistance to drought. Here, we investigated DSE colonization and species diversity in roots of Lycium ruthenicum collected from Anxi and Minqin, in northwest China, during July, September, and December 2019. This study aimed to evaluate the influence of seasonality and sampling sites on DSEs. In different seasons, DSE colonization varied with the phenology of L. ruthenicum. At different sites, DSE colonization significantly differed. Four isolates were reported in desert ecosystems for the first time. The results showed microsclerotial colonization was directly affected by changing seasons, while hyphal colonization and species diversity were directly affected by sampling sites. The soil organic carbon, pH, alkaline phosphatase, and alkali-hydrolyzable nitrogen were the main predictors of DSE colonization and species diversity. We conclude that DSE colonization and diversity showed significant spatial–temporal heterogeneity and were closely related to soil factors. This research provides a basis for the further understanding of the ecological functions of DSEs and their application potential for vegetative restoration and agricultural cultivation in drylands.

scholarly journals Mycorrhiza Reduces Adverse Effects of Dark Septate Endophytes (DSE) on Growth of Conifers

PLoS ONE ◽  
2012 ◽  
Vol 7 (8) ◽  
pp. e42865 ◽  
Author(s):  
Vanessa Reininger ◽  
Thomas N. Sieber
Keyword(s):  
Adverse Effects ◽  
Dark Septate Endophytes

scholarly journals Inoculation With Ectomycorrhizal Fungi and Dark Septate Endophytes Contributes to the Resistance of Pinus spp. to Pine Wilt Disease

2021 ◽  
Vol 12 ◽  
Author(s):  
Honglong Chu ◽  
Haihua Wang ◽  
Yanan Zhang ◽  
Zhumei Li ◽  
Chunyan Wang ◽  
...  
Keyword(s):  
Community Structure ◽  
Microbial Community ◽  
Ectomycorrhizal Fungi ◽  
Microbial Community Structure ◽  
Pine Wilt Disease ◽  
Wilt Disease ◽  
Dark Septate Endophytes ◽  
Pine Wilt ◽  
Microbial Carbon ◽  
Pinus Spp

Pine wilt disease (PWD) is a deadly disease to pines (Pinus spp.) worldwide. The occurrence of PWD can reduce the relative abundance of root ectomycorrhizal fungi (ECMF) and dark septate endophytes (DSE). However, the effects of exogenous ECMF/DSE inoculation on the rhizosphere microbial community structure of Pinus tabulaeformis infected by pine wood nematode (PWN) is little known. Here, we tested how ECMF/DSE may improve resistance to PWD by quantifying microbial carbon biomass and soil enzymatic activity among different treatments at 6 and 9 months after PWN infection. Denaturing gradient gel electrophoresis (DGGE) was used to study the microbial community structure at 3, 6, and 9 months after PWN infection in the rhizosphere of P. tabulaeformis seedlings inoculated with ECMF/DSE. The results showed that exogenous ECMF/DSE inoculation reduced the disease severity caused by PWN infection. After PWN infection, the rhizosphere microbial carbon of seedlings inoculated with Amanita vaginata, Suillus bovinus, Gaeumannomyces cylindrosporus, and Paraphoma chrysanthemicola was 38.16, 49.67, 42.11, and 96.05% higher than that of the control group, respectively. Inoculation of ECMF/DSE inhibited the decrease of rhizosphere microbial biomass caused by PWN infection. The richness and diversity of P. tabulaeformis rhizosphere fungi at 9 months were reduced by PWN infection but partially recovered by the exogenous fungi (ECMF/DSE) inoculation except for P. chrysanthemicola, which indicates a role of ECMF/DSE in maintaining stability of the microbial community. Inoculation with ECMF/DSE increased the beneficial bacterial (Thauera sp., Mesorhizobium sp., etc.) and fungal groups (Tomentella ellisii, Wilcoxina mikolae, etc.) of in the rhizosphere. In summary, exogenous ECMF/DSE inoculation could increase P. tabulaeformis resistance to PWD probably by improving the rhizosphere microenvironment.

scholarly journals Patterns of root colonization by arbuscular mycorrhizal fungi and dark septate endophytes across a mostly-unvegetated, high-elevation landscape

2018 ◽  
Vol 36 ◽  
pp. 63-74 ◽  
Author(s):  
Clifton P. Bueno de Mesquita ◽  
Samuel A. Sartwell ◽  
Emma V. Ordemann ◽  
Dorota L. Porazinska ◽  
Emily C. Farrer ◽  
...  
Keyword(s):  
Arbuscular Mycorrhizal Fungi ◽  
Mycorrhizal Fungi ◽  
Root Colonization ◽  
Arbuscular Mycorrhizal ◽  
High Elevation ◽  
Dark Septate Endophytes

Dark septate endophytes present different potential to solubilize calcium, iron and aluminum phosphates

2017 ◽  
Vol 111 ◽  
pp. 25-32 ◽  
Author(s):  
F.N. Spagnoletti ◽  
N.E. Tobar ◽  
A. Fernández Di Pardo ◽  
V.M. Chiocchio ◽  
R.S. Lavado
Keyword(s):  
Dark Septate Endophytes ◽  
Aluminum Phosphates ◽  
Calcium Iron

scholarly journals Unravelling the Role of Melanin in Cd and Zn Tolerance and Accumulation of Three Dark Septate Endophytic Species

2020 ◽  
Vol 8 (4) ◽  
pp. 537
Author(s):  
Charlotte Berthelot ◽  
Asfaw Zegeye ◽  
Dalia A. Gaber ◽  
Michel Chalot ◽  
Philipp Franken ◽  
...  
Keyword(s):  
Trace Element ◽  
Cell Walls ◽  
Functional Trait ◽  
Dark Septate Endophytes ◽  
Melanin Synthesis ◽  
Melanin Production ◽  
Cd Accumulation ◽  
Series Of Experiments ◽  
Zn Tolerance

Dark septate endophytes (DSEs) are often trace element (TE)-tolerant fungi and are abundant in TE-polluted environments. The production of melanin, a black polymer found in cell walls, was hypothesized by several authors to play a role in the TE tolerance of DSEs. To test this hypothesis, we established a series of experiments using albino strains and melanin inhibitors and examined the responses to Cd and Zn. Six DSEs belonging to genera Cadophora sp., Leptodontidium sp. and Phialophora mustea, were evaluated. The strains mainly produced 1,8-dihydroxynaphthalene (DHN) melanin whereas 3,4-dihydroxyphenylalanin melanin was also synthetized. Cd and Zn decreased melanin synthesis in most of the strains. A reduction in melanin concentration in hyphae through the use of tricyclazole, an inhibitor of DHN-melanin synthesis, did not reduce the tolerance of the strains to Cd and Zn. Similarly, albino mutants of Leptodontidium sp. were not more sensitive to Cd and Zn than the WT strain. Moreover, tricyclazole-treated colonies accumulated less Cd but more Zn compared to untreated colonies. The Cd and Zn contents of Leptodontidium albino strains were variable and similar to that of the WT. The results suggest that melanin production is not an important functional trait that contributes to Cd and Zn tolerance, but might contribute to Cd accumulation.

scholarly journals Selection of arbuscular mycorrhizal fungi for sugarcane in four soils with the presence of dark septate endophytes

2019 ◽  
Vol 42 ◽  
pp. e42477 ◽  
Author(s):  
Rosalba Ortega Fors ◽  
Orivaldo José Saggin Júnior ◽  
Marco Aurélio Carbone Carneiro ◽  
Ricardo Luis Louro Berbara
Keyword(s):  
Arbuscular Mycorrhizal Fungi ◽  
Mycorrhizal Fungi ◽  
Root Colonization ◽  
Arbuscular Mycorrhizal ◽  
Dark Septate Endophytes ◽  
P Availability ◽  
P Nutrition ◽  
P Content ◽  
Selection Of ◽  
Scutellospora Calospora

The present study aimed to select efficient arbuscular mycorrhizal fungi (AMF) for sugarcane growth and P nutrition in four soils that spontaneously contained dark septate endophytes (DSE). The effect of nine AMF isolates was evaluated individually in sugarcane presprouted seedlings (SP81-3250) grown under greenhouse conditions for a 120-day period. The isolates that stimulated plant growth in the soils with low P availability were Acaulospora colombiana (ACOL), Claroideoglomus etunicatum (CETU), Gigaspora margarita (GMAR), Rhizophagus clarus (RCLA) and Scutellospora calospora (SCAL). Compared to the Yellow Argisol, which had the highest P level, the Red-Yellow Argisol, with an intermediate P content, increased plant height. Compared to the other treatments, inoculation with ACOL, RCLA, and SCAL resulted in higher foliar P content in plants grown in soils with high to intermediate P levels. Root colonization by AMF and DSE was verified in the plants, with the coexistence of both fungal groups in the same plant and/or root fragment. However, AMF colonization was low compared to DSE colonization. The cooccurrence of DSE and AMF was higher in the plants inoculated with ACOL, RCLA, SCAL, and Dentiscutata heterogama. ACOL, CETU, GMAR, RCLA, and SCAL are AMF isolates that have the potential to establish a mycorrhizal inoculant for sugarcane that would be effective in several soils.

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