Arbuscular Mycorrhizas and Dark Septate Fungi in Lycopodium paniculatum (Lycopodiaceae) and Equisetum bogotense (Equisetaceae) in a Valdivian Temperate Forest of Patagonia, Argentina

Fernández, Natalia; Messuti, Marı́a Inés; Fontenla, Sonia

doi:10.1640/0002-8444(2008)98[117:amadsf]2.0.co;2

Cited by 26 publications

(24 citation statements)

References 36 publications

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“…However, in order to clarify conflicting evidence for symbionts we made our own critical observations. As reported by previous authors (Boullard, ; Dhillon, ; Fernández et al, ), we found both AM fungi with vesicles and dark septate hyphae in old roots of six species of Equisetum from different habitats, viz., E. arvense, E. fluviatile, E. giganteum, E. hyemale, E. telmateia and E. variegatum . Fungi were never observed in young roots with intact apices and DNA sequencing produced negative results (Rimington et al, unpublished data).…”

Section: Systematic Surveysupporting

confidence: 89%

“…Whether or not dark septate hyphae (see Burgeff, ; Boullard, ; Iqbal et al, ; Dhillon, ; Nadarajah & Nawawi, ; Moteetee et al, ; Mandyam & Jumpponen, ; Fernández et al, ; Lehnert et al, ; Sudová et al, ; Muthukumar & Prabia, ; Muthuraja et al, ; Lara‐Pérez et al, , for examples) form any kind of mutualistic relationship with pteridophytes has not been explored, but on the evidence to date this would seem unlikely. We are not aware of any published ultrastructural study showing such hyphae in a host cell with healthy cytoplasm in any land plant let alone a pteridophyte, and definitive evidence for a function in seed plants has not yet been forthcoming (Jumpponen & Trappe, ; Jumpponen, ; Newsham, ).…”

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confidence: 99%

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Pteridophyte fungal associations: Current knowledge and future perspectives

Pressel

Bidartondo

Field

et al. 2016

J of Sytematics Evolution

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Current understanding of the nature and function of fungal associations in pteridophytes is surprisingly patchy given their key evolutionary position, current research foci on other early-branching plant clades, and major efforts at unravelling mycorrhizal evolution and the mechanisms underlying this key interaction between plants and fungi. Here we provide a critical review of current knowledge of fungal associations across pteridophytes and consider future directions making recommendations along the way. From a comprehensive survey of the literature, a confused picture emerges: suggestions that members of the Lycopsida harbour Basidiomycota fungi contrast sharply with extensive cytological and recent molecular evidence pointing to exclusively Glomeromycota and/or Mucoromycotina associations in this group. Similarly, reports of dark septate, assumingly ascomycetous, hyphae in a range of pteridophytes, advocating a mutualistic relationship, are not backed by functional evidence and the fact that the fungus invariably occupies dead host tissue points to saprotrophy and not mutualism. The best conclusion that can be reached based on current evidence is that the fungal symbionts of pteridophytes belong to the two fungal lineages Mucoromycotina and Glomeromycota. Do symbiotic fungi and host pteridophytes engage in mutually beneficial partnerships? To date, only two pioneering studies have addressed this key question demonstrating reciprocal exchange of nutrients between the sporophytes of Ophioglossum vulgatum and Osmunda regalis and their fungal symbionts. There is a pressing need for more functional investigations also extending to the gametophyte generation and coupled with in vitro isolation and resynthesis studies to unravel the effect of the fungi on their host.

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Section: Systematic Surveysupporting

confidence: 89%

mentioning

confidence: 99%

Pteridophyte fungal associations: Current knowledge and future perspectives

Pressel

Bidartondo

Field

et al. 2016

J of Sytematics Evolution

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“…Algunas familias como Dryopteridaceae, Equisetaceae, Hymenophyllaceae, Lycopodiaceae y Polypodiaceae (grammítidos) forman asociaciones con HSO que se distinguen por ser dematiáceos a hialinos, con hifas septadas, presencia ocasional de microesclerocios y células moniliformes (Fernández, Messuti, & Fontenla, 2008;Lehnert et al, 2009;Kessler et al, 2009). La presencia de los HSO en las diferentes familias de helechos y licófitas podría sugerir que estos hongos tienen un papel ecológico importante para el crecimiento y desarrollo de las especies.…”

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Micorriza arbuscular, Mucoromycotina y hongos septados oscuros en helechos y licófitas con distribución en México: una revisión global

Lara-Pérez

Zulueta-Rodríguez

Andrade‐Torres

2017

RBT

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Arbuscular mycorrhizal, Mucoromycotina and dark septate fungi in ferns and lycophytes with distribution in Mexico: a global review. Ferns and lycophytes are a group of vascular plants of interest to understand the evolution of mycorrhizal interactions; their preservation is of relevance for their multiple ecological relations. The record of different taxonomic groups of fungi associated with ferns and lycophytes is fragmentary, and the criteria for it identification is inconsistent, which hinders the understanding and determination of mycorrhizal status. The aim of this study was to determine the percentage of the species of ferns and lycophytes with distribution in Mexico, and with information of fungal interactions. A checklist of the presence of arbuscular mycorrhizal fungi (AMF), Mucoromycotina and dark septate fungi (DSF) associated with ferns and lycophytes was integrated through an exhaustive global literature search. In this study, mycorrhizal species was considered by the presence of arbuscules to differentiate with hyphal, vesicular and coils colonization. The study gathered a checklist of mycorrhizal occurrences of 27 families, 61 genus and 137 species of ferns and lycophytes, which covers 13.4 % of the species, 91 % of the genus and 77 % of the families distributed in Mexico. The 78.1 % of the species showed colonization, 56.2 % by AMF, 29.9 % by DSF and 0.72 % by Mucoromycotina fungi. From the total of the species, the higher presences of colonization were in terrestrial, epiphytic, saxicolous, and aquatic plants with 76.6 %, 33.3 %, 20 %, and 6.3 %, respectively. The families of ferns and lycophytes with the higher number of species colonized were Pteridaceae, Polypodiaceae, Aspleniaceae and Dryopteridaceae. The present study showed the widespread associations of AMF and DSF in ferns and lycophytes of Mexico. It is urgently needed to include ferns and lycophytes in studies focused on endomycorhizal interactions, since only 28 species (28 %) were studied in Mexican ecosystems. The majority of studies were focused on sporophytic face (80 %). Nonetheless, to understand the role that plays the mycorrhiza in the establishment of ferns and lycophytes, it is necessary to include the gametophytic face in ecological, molecular and physiological experimental studies. This information is important to implement conservation strategies, because a considerable number of ferns and lycophytes species, depend on these mycorrhizal associations for their growth and survival. Rev. Biol. Trop. 65

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“…, Group 2), whereas terrestrial species tend to be consistently mycorrhizal (Fig. , Group 3) with a Paris ‐type colonization pattern .…”

Section: Discussionmentioning

confidence: 99%

Occurrence of arbuscular mycorrhizas and dark septate endophytes in pteridophytes from a patagonian rainforest, Argentina

2012

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Arbuscular mycorrhizas (AM) are one of the most widespread types of symbiotic associations. Pteridophytes occupy an important position in the evolution of vascular plants. However, their mycorrhizal state remains poorly understood. The aim of this work was to describe the general mycorrhizal status and the occurrence of dark septate endophytes (DSE) in the pteridophytic flora of a Valdivian temperate forest in Patagonia, Argentina. First, the roots of nine terrestrial species representing six families were examined, and this information was then compared with other surveys concerning the occurrence of AM in other pteridophytic species within the same Valdivian temperate forest. AM were recorded in 98.6% of the samples analyzed in this work and all of them corresponded to the Paris-type morphology. DSEs were also present within the roots of all terrestrial species. A comparison to published results in other ferns and lycophytes that have been studied in this Valdivian temperate forest (161 sporophytes, 21 species and 10 families) was made. Clear differences in colonization patterns between eusporangiate/leptosporangiate and epiphytic/terrestrial species became evident and are discussed.

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Arbuscular Mycorrhizas and Dark Septate Fungi in Lycopodium paniculatum (Lycopodiaceae) and Equisetum bogotense (Equisetaceae) in a Valdivian Temperate Forest of Patagonia, Argentina

Abstract: Arbuscular Mycorrhizas and Dark Septate Fungi in Lycopodium paniculatum (Lycopodiaceae) and Equisetum bogotense (Equisetaceae) in a Valdivian Temperate Forest of Patagonia, Argentina

Cited by 26 publications

References 36 publications

Pteridophyte fungal associations: Current knowledge and future perspectives

Pteridophyte fungal associations: Current knowledge and future perspectives

Micorriza arbuscular, Mucoromycotina y hongos septados oscuros en helechos y licófitas con distribución en México: una revisión global

Occurrence of arbuscular mycorrhizas and dark septate endophytes in pteridophytes from a patagonian rainforest, Argentina

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