Inoculation ofRhododendron cv. Belle-Heller with two strains ofPhialocephala fortinii in two different substrates

Vohník, Martin; Lukančič, Simon; Bahor, Edi; Regvar, Marjana; Vosátka, Miroslav; Vodnik, Dominik

doi:10.1007/bf02803151

Cited by 40 publications

(24 citation statements)

References 24 publications

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“…In contrast to ErMF, the ecophysiological significance of DSE in ericaceous plants remains unclear. Vohník et al (2003) found a neutral effect of inoculation with two strains of P. fortinii s.l. on the growth parameters of Rhododendron cv.…”

Section: Discussionmentioning

confidence: 94%

“…), latitude (northern Greenland to northern Australia), and substrate composition, and represent an important part of local flora (Dostálková 1981). Rhododendron roots form a habitat for fungi-forming ErM (Moore-Pankhurst and Englander 1981; Duddridge and Read 1982;Douglas et al 1989;Currah et al 1993a;Usuki et al 2003;Vohník et al 2005), DSE association (Currah et al 1993b;Vohník et al 2003), EcM (Dighton and Coleman 1992), and AM (Dighton and Coleman 1992;Chaurasia et al 2005).…”

Section: Introductionmentioning

confidence: 97%

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The Co-occurrence and Morphological Continuum Between Ericoid Mycorrhiza and Dark Septate Endophytes in Roots of Six European Rhododendron Species

Vohník

Albrechtová

2011

Folia Geobot

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Ericaceae associate with a wide spectrum of root mycobionts, but the most common are ascomycetous ericoid mycorrhizal fungi and dark septate endophytes (DSE), followed by basidiomycetous fungi and glomeracean arbuscular mycorrhizal fungi. We investigated distribution and morphological diversity of ericoid mycorrhizae (ErM), DSE associations, ectomycorrhizae (EcM) and arbuscular mycorrhizae (AM) in hair roots of six European native Rhododendron species and found that i) while EcM and AM were absent, ErM and DSE associations were simultaneously present in all screened plants; ii) their levels were negatively correlated, suggesting Ericaceae preference for certain root-fungus association in certain habitats; iii) the highest ErM colonization occurred at sites in southern and central Europe, while the highest DSE colonization was found in a subarctic site in northern Finland and in a subalpine site in the Carpathians, suggesting a latitudinal/altitudinal shift in Ericaceae root-fungus associations; iv) some mycelia could simultaneously form structures corresponding to ErM and DSE association, which occasionally resulted in a unique ectendomycorrhizal colonization comprising an intercellular parenchymatous net and intracellular hyphal coils. These results indicate frequent interactions between ErM fungi and DSE in roots of European rhododendrons and a morphological continuum between ErM and DSE associations. The new ectendomycorrhizal type deserves further investigation.

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Section: Discussionmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 97%

The Co-occurrence and Morphological Continuum Between Ericoid Mycorrhiza and Dark Septate Endophytes in Roots of Six European Rhododendron Species

Vohník

Albrechtová

2011

Folia Geobot

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“…Some DSE can form structures morphologically resembling hyphal interfaces produced by mycorrhizal fungi for communication and nutrient exchange with their host plant [52,57,58], and the DSE colonization pattern in P. oceanica roots reported by Vohník et al [22] comprises dense parenchymatous nets/hyphal sheaths on the root surface which may morphologically resemble hyphal mantles produced by some ectomycorrhizal fungi. On one hand, based on the microscopic observations, it seems plausible that this DSE association is formed by the pleosporalean mycobiont discovered in this study.…”

Section: Discussionmentioning

confidence: 95%

Communities of Cultivable Root Mycobionts of the Seagrass Posidonia oceanica in the Northwest Mediterranean Sea Are Dominated by a Hitherto Undescribed Pleosporalean Dark Septate Endophyte

2015

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Seagrasses, a small group of submerged marine macrophytes, were reported to lack mycorrhizae, i.e., the root-fungus symbioses most terrestrial plants use for nutrient uptake. On the other hand, several authors detected fungal endophytes in seagrass leaves, shoots, rhizomes, and roots, and an anatomically and morphologically unique dark septate endophytic (DSE) association has been recently described in the roots of the Mediterranean seagrass Posidonia oceanica. Nevertheless, the global diversity of seagrass mycobionts is not well understood, and it remains unclear what fungus forms the DSE association in P. oceanica roots. We isolated and determined P. oceanica root mycobionts from 11 localities in the northwest Mediterranean Sea with documented presence of the DSE association and compared our results with recent literature. The mycobiont communities were low in diversity (only three species), were dominated by a single yet unreported marine fungal species (ca. 90 % of the total 177 isolates), and lacked common terrestrial and freshwater root mycobionts. Our phylogenetic analysis suggests that the dominating species represents a new monotypic lineage within the recently described Aigialaceae family (Pleosporales, Ascomycota), probably representing a new genus. Most of its examined colonies developed from intracellular microsclerotia occupying host hypodermis and resembling microsclerotia of terrestrial DSE fungi. Biological significance of this hitherto overlooked seagrass root mycobiont remains obscure, but its presence across the NW Mediterranean Sea and apparent root intracellular lifestyle indicate an intriguing symbiotic relationship with the dominant Mediterranean seagrass. Our microscopic observations suggest that it may form the DSE association recently described in P. oceanica roots.

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“…In order to compare our results with the literature we performed a meta-analysis (For details see Alberton et al 2005) based on 11 studies (Fernando and Currah 1996;Cameron 1998;Jumpponen et al 1998;Jumpponen and Trappe 1998b;Yu 2000;Hashimoto and Hyakumachi 2001;Schulz et al 2002;Vohník et al 2003Vohník et al , 2005Wu and Guo 2008;Grelet et al 2009). The meta-analysis showed for shoot biomass no significant effect (Response ratio R [inoculated/control]=1.05 (95% confidence interval of R=0.92-1.19; n=34), and a significant positive effect for root mass (R=1.30; 95% confidence interval of R = 1.05-1.61; n=16).…”

Section: Discussionmentioning

confidence: 99%

Dark septate root endophytic fungi increase growth of Scots pine seedlings under elevated CO2 through enhanced nitrogen use efficiency

2009

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Although increasing concentrations of atmospheric CO 2 are predicted to have substantial impacts on plant growth and functioning of ecosystems, there is insufficient understanding of the responses of belowground processes to such increases. We investigated the effects of different dark septate root endophytic (DSE) fungi on growth and nutrient acquisition by Pinus Under elevated CO 2 , the biomass of seedlings inoculated with DSE fungi was on average 17% higher than in control seedlings. Simultaneously, below-ground respiration doubled or trebled, and as a consequence carbon use efficiency by the DSE fungi significantly decreased. Shoot N concentration decreased on average by 57% under elevated CO 2 and was lowest in seedlings inoculated with S. vaccinii. Carbon gain by the seedlings despite reduced shoot N concentration indicates that DSE fungi increase plant nutrient use efficiency and are therefore more beneficial to the plant under elevated CO 2 .

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Inoculation ofRhododendron cv. Belle-Heller with two strains ofPhialocephala fortinii in two different substrates

Cited by 40 publications

References 24 publications

The Co-occurrence and Morphological Continuum Between Ericoid Mycorrhiza and Dark Septate Endophytes in Roots of Six European Rhododendron Species

The Co-occurrence and Morphological Continuum Between Ericoid Mycorrhiza and Dark Septate Endophytes in Roots of Six European Rhododendron Species

Communities of Cultivable Root Mycobionts of the Seagrass Posidonia oceanica in the Northwest Mediterranean Sea Are Dominated by a Hitherto Undescribed Pleosporalean Dark Septate Endophyte

Dark septate root endophytic fungi increase growth of Scots pine seedlings under elevated CO2 through enhanced nitrogen use efficiency

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