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Characterization of Ectomycorrhizal species through molecular biology tools and morphotyping Scientia Agricola
Clasen,Bárbara Estevão; Silveira,Andressa de Oliveira; Baldoni,Daiana Bortoluzzi; Montagner,Daiane Fiuza; Jacques,Rodrigo Josemar Seminoti; Antoniolli,Zaida Inês.
ABSTRACT: Mycorrhizae are mutualistic associations between fungi and plant roots. These symbiotic associations are abundant and occur in 75 to 80 % of plants. Ectomycorrhizal fungi are very important in ecosystems, because their mutualistic association with plants of different species helps nutrients and water absorption, as well as protection of the host plant against pathogens and abiotic stresses. Most ectomycorrhizal fungi belong to the Basidiomycota class, such as the following genera: Amanita, Hebeloma, Hysterangium, Laccaria, Lactarius, Rhizopogon, Russula, Scleroderma, Suillus, Tricholoma, among others. Morphological studies on ectomycorrhizae report important results in understanding the species biodiversity. However, the use of molecular biology...
Tipo: Info:eu-repo/semantics/article Palavras-chave: PCR; Ectomycorrhizal fungi; Molecular identification; Morphotype.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162018000300246
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Effect of the mycorrhizal symbiosis time in the antioxidant activity of fungi and Pinus pinaster roots, stems and leaves IPB - Escola Superior Agrária
Reis, Filipa S.; Ferreira, Isabel C.F.R.; Martins, Anabela.
The ectomycorrhizal (ECM) symbiosis that develops between the roots of host trees and the soil ECM fungi is an important factor towards the survival, health and growth of these trees, as it stimulates their water and nutrient uptake. Ectomycorrhizal colonization can result in the deposition of phenolic compounds in peripheral cortex cells and a similar answer can be recognized as one way of plant defense against pathogenic infections. The aim of the present work was the evaluation of antioxidant potential of the ectomycorrhizal fungi, Paxillus involutus and Pisolithus arhizus, in presence and absence of the symbiont – Pinus pinaster –, in response to the symbiotic association, under different contact periods (45 days and 48 h). Phenolic contents in...
Tipo: Article Palavras-chave: Ectomycorrhizal fungi; Pinus pinaster; Symbiosis; Contact period; Antioxidant potential.
Ano: 2011 URL: http://hdl.handle.net/10198/6234
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Evaluación y cuantificación de las comunidades microbianas asociadas con las raíces micorrizadas de Pinus Montezumae y Pinus greggii. Colegio de Postgraduados
Reyes Molina, Samanta Adriana.
La ectomicorriza (ECM) es una simbiosis de enorme importancia estructural y funcional en los ecosistemas forestales boreales, templados y algunos tropicales. A su vez, la ECM establece relaciones simbióticas con diversos grupos de organismos dentro de los que se incluyen otros grupos microbianos, tales como hongos, bacterias y actinomicetos. Diversas investigaciones han determinado que el establecimiento, propagación y dinámica de los hongos ectomicorrízicos en las raíces de sus hospederos se encuentra influenciado por diversos microorganismos rizosféricos y de la micorrizósfera. El objetivo del presente trabajo fue evaluar las comunidades microbianas asociadas con las ECMs establecidas entre Pinus greggii y P. montezumae y tres hongos ectomicorrízicos...
Palavras-chave: Bacterias promotoras del crecimiento vegetal; Hongos ectomicorrízicos; Colonización micorrízica; Plant growth-promoting bacteria; Ectomycorrhizal fungi; Mycorrhizal colonization; Maestría; Botánica.
Ano: 2011 URL: http://hdl.handle.net/10521/472
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Evaluación y cuantificación de las comunidades microbianas asociadas con las raíces micorrizadas de Pinus Montezumae y Pinus greggii. Colegio de Postgraduados
Reyes Molina, Samanta Adriana.
La ectomicorriza (ECM) es una simbiosis de enorme importancia estructural y funcional en los ecosistemas forestales boreales, templados y algunos tropicales. A su vez, la ECM establece relaciones simbióticas con diversos grupos de organismos dentro de los que se incluyen otros grupos microbianos, tales como hongos, bacterias y actinomicetos. Diversas investigaciones han determinado que el establecimiento, propagación y dinámica de los hongos ectomicorrízicos en las raíces de sus hospederos se encuentra influenciado por diversos microorganismos rizosféricos y de la micorrizósfera. El objetivo del presente trabajo fue evaluar las comunidades microbianas asociadas con las ECMs establecidas entre Pinus greggii y P. montezumae y tres hongos ectomicorrízicos...
Palavras-chave: Bacterias promotoras del crecimiento vegetal; Hongos ectomicorrízicos; Colonización micorrízica; Plant growth-promoting bacteria; Ectomycorrhizal fungi; Mycorrhizal colonization; Maestría; Botánica.
Ano: 2011 URL: http://hdl.handle.net/10521/472
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Growth response of Pinus densiflora seedlings inoculated with three indigenous ectomycorrhizal fungi in combination BJM
Dalong,M; Luhe,W; Guoting,Y; Liqiang,M; Chun,L.
Pinus densiflora seedlings were inoculated with three indigenous ectomycorrhizal fungi (Cenococcum geophilum, Rhizopogon roseolus and Russula densifolia) in single-, two-, and three-species treatments. After 8 months, the colonization rates of each ectomycorrhizal species, seedling growth and the nutrition were assessed in each treatment. P. densiflora seedlings inoculated with different ECM species composition showed an increase in height and basal diameter and improved seedling root and shoot nutrition concentrations compared to control treatment. Generally, combined inoculation had a more positive influence on the seedlings than the single inoculation. The three-species inoculation presented the highest growth and basal diameter and concentration of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Ectomycorrhizal fungi; Pinus densiflora; Combined inoculation.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822011000300045
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Mycorrhizal induction of phenolic compounds and antioxidant properties of fungi and seedlings during the early steps of symbiosis. IPB - Escola Superior Agrária
Reis, Filipa S.; Ferreira, Isabel C.F.R.; Barros, Lillian; Santos-Buelga, Celestino; Martins, Anabela.
Ectomycorrhizal (ECM) symbiosis plays a major role in nutrient cycling and the functioning of forest ecosystems. Trees with well developed ectomycorrhizas are more resistant to environmental stresses such as drought and to biotic stresses such as root pathogens. The establishment of ECM symbiosis is triggered by signals produced by both partners. These signals lead to morphological changes and a complex development of specific structures in both the plant root and the fungus. The development of the ECM fungi, Paxillus involutus and Pisolithus arhizus, in presence and absence of the symbiont – Pinus pinaster- was evaluated, as well as their antioxidant properties and phenolic compounds composition in response to the symbiotic association. ECM fungi grew...
Tipo: Article Palavras-chave: Antioxidant activity; Ectomycorrhizal fungi; Phenolic compounds; Pinus pinaster seedlings; Symbiosis.
Ano: 2011 URL: http://hdl.handle.net/10198/6229
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Physiological-enzymatic characteristics and inoculation of mycelial strains of Descolea antarctica Sing. in Nothofagus seedlings Electron. J. Biotechnol.
Valenzuela,Eduardo; Hipp,Joseline; Alonso,Claudia; Godoy,Roberto; Alberdi,Miren; Alvarez,Maricel; Saavedra,Isabel.
At present, reforestation has focused on native forests with anthropogenic intervention and eroded soils. There is interest in producing Nothofagus seedlings which can overcome adverse conditions encountered on reforestation sites. It is necessary to find new fungi that can be utilized as mycorrhizal inoculants and that enable the seedlings to increase their tolerance to adverse conditions. Two ectomycorrhizal strains of the fungus Descolea antarctica (D1 and D2) were cultured at different temperatures, pH levels and the activities of amylases, cellulases, and phosphatases were determined. In greenhouse and nursery trials, the growth responses of inoculated Nothofagus obliqua seedlings were evaluated. D1 and D2 exhibited the highest growth rates at 23ºC....
Tipo: Journal article Palavras-chave: Cellulose; Ectomycorrhizal fungi; Nothofagus; PH; Phosphatase; Temperature.
Ano: 2008 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582008000200012
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Polymorphism in the internal transcribed spacer (ITS) of the ribosomal DNA of 26 isolates of ectomycorrhizal fungi. Repositório Alice
GOMES, E. A.; KASUYA, M.C.M.; BARROS, E.G. de; BORGES, A.C.; ARAUJO, E.F..
Inter- and intraspecific variation among 26 isolates of ectomycorrhizal fungi belonging to 8 genera and 19 species were evaluated by analysis of the internal transcribed sequence (ITS) of the rDNA region using restriction fragment length polymorphism (RFLP). The ITS region was first amplified by polymerase chain reaction (PCR) with specific primers and then cleaved with different restriction enzymes. Amplification products, which ranged between 560 and 750 base pairs (bp), were obtained for all the isolates analyzed. The degree of polymorphism observed did not allow proper identification of most of the isolates. Cleavage of amplified fragments with the restriction enzymes Alu I, Hae III, Hinf I, and Hpa II revealed extensive polymorphism. All eight genera...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: DNA fingerprinting; Ectomycorrhizal fungi; Internal transcribed spacer (ITS); PCR-RFLP; Ribosomal DNA (rDNA).
Ano: 2002 URL: http://www.alice.cnptia.embrapa.br/handle/doc/488489
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Polymorphism in the internal transcribed spacer (ITS) of the ribosomal DNA of 26 isolates of ectomycorrhizal fungi Genet. Mol. Biol.
Gomes,Eliane A.; Kasuya,Maria Catarina M.; Barros,Everaldo G. de; Borges,Arnaldo C.; Araújo,Elza F..
Inter- and intraspecific variation among 26 isolates of ectomycorrhizal fungi belonging to 8 genera and 19 species were evaluated by analysis of the internal transcribed sequence (ITS) of the rDNA region using restriction fragment length polymorphism (RFLP). The ITS region was first amplified by polymerase chain reaction (PCR) with specific primers and then cleaved with different restriction enzymes. Amplification products, which ranged between 560 and 750 base pairs (bp), were obtained for all the isolates analyzed. The degree of polymorphism observed did not allow proper identification of most of the isolates. Cleavage of amplified fragments with the restriction enzymes Alu I, Hae III, Hinf I, and Hpa II revealed extensive polymorphism. All eight genera...
Tipo: Info:eu-repo/semantics/article Palavras-chave: DNA fingerprinting; Ectomycorrhizal fungi; Internal transcribed spacer (ITS); PCR-RFLP; Ribosomal DNA (rDNA).
Ano: 2002 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572002000400018
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Response to water deficit of Nothofagus dombeyi plants inoculated with a specific (Descolea antárctica Sing) and non-specific (Pisolithus tinctorious (Pers.) Coker & Couch) ectomycorrhizal fungi RChHN
ALBERDI,MIREN; ÁLVAREZ,MARICEL; VALENZUELA,EDUARDO; GODOY,ROBERTO; OLIVARES,ERICK; BARRIENTOS,MÓNICA.
The influence of the specific Descolea antárctica {Da) and the non-specific Pisolithus tinctorious {Pt) ectomycorrhizal fungi on some physiological leaf parameters of the Chilean evergreen Nothofagus dombeyi subjected to a low soil water potential (-1.6 to -1.9 MPa in a growth chamber for 35 days) and a high water potential (-0.07 to -0.09 MPa, control) was studied. Drought decreased the water status and increased carbohydrates in mycorrhizal and non-mycorrhizal plants, appearing Z)a-mycorrhizal and non mycorrhizal plants better osmotically adjusted (OA= 0.60 MPa and 0.52 MPa, respectively) than ft-mycorrhizal (0.39 MPa). Proline is not involved in the O A of mycorrhizal plants. The inoculation of N. dombeyi with both ectomycorrhizal fungi favored a better...
Tipo: Journal article Palavras-chave: Nothofagus dombeyi; Ectomycorrhizal fungi; Water deficit; Osmotic adjustment; Performance of the PS II.
Ano: 2007 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2007000400009
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Revision of Lactarius from Mexico. Additional new records Naturalis
Montoya, Leticia; Bandala, Victor M..
Three species of Lactarius from Mexico were studied: L. deceptivus, L. luteolus and L. rimosellus. The latter two concern new records from western Mexico and from the Gulf of Mexico region, respectively, and the former was found on new localities. A study of their respective type collections and those of L. tomentosomarginatus and L. echinatus was made in order to support the identity of Mexican specimens. Based on a morphological study we propose reducing L. tomentosomarginatus to synonymy of L. deceptivus and agree with other authors that L. echinatus is conspecific with L. luteolus. Descriptions and illustrations are given of the three Mexican records.
Tipo: Article / Letter to the editor Palavras-chave: Russulales; Taxonomy; Ectomycorrhizal fungi; Type studies.
Ano: 2005 URL: http://www.repository.naturalis.nl/record/532475
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Taxonomy of Tricholoma in northern Europe based on ITS sequence data and morphological characters Naturalis
Heilmann-Clausen, J.; Christensen, M.; Frøslev, T.G.; Kjøller, R..
Based on molecular and morphological data we investigated the taxonomy and phylogeny of the ectomycorrhizal genus Tricholoma in northern Europe. Our phylogenetic tree confirmed the presence of at least 72 well circumscribed species within the region. Of these, three species, viz. T. boreosulphurescens, T. bryogenum and T. ilkkae are described as new to science, based on morphological, distributional, ecological and molecular data. Several other terminal branches represent putative cryptic taxa nested within classical species or species groups. Molecular type studies and/or designation of sequenced neotypes are needed in these groups, before the taxonomy can be settled. In general our phylogenetic analysis supported previous suprageneric classification...
Tipo: Article / Letter to the editor Palavras-chave: Agarics; Biogeography; Cryptic species; Ectomycorrhizal fungi; Host selection; Morphological traits; Phylogeny; Tricholomataceae.
Ano: 2017 URL: http://www.repository.naturalis.nl/record/614530
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The role of mycorrhization helper bacteria in the establishment and action of ectomycorrhizae associations BJM
Rigamonte,Tatiana Alves; Pylro,Victor Satler; Duarte,Gabriela Frois.
More than 95 % short roots of most terrestrial plants are colonized by mycorrhizal fungi as soon as they emerge in the upper soil profiles. The establishment of mycorrhizal association involves profound morphological and physiological changes in root and fungus. It is affected by other rhizospheric microorganisms, specifically by the bacteria. Bacteria may have developed mechanisms of selective interaction with surrounding microorganisms, with neutral or positive effects on mycorrhizal associations, but negative effect on root pathogens in general. Because of the beneficial effect of bacteria on mycorrhizae, the concept of Mycorrhization Helper Bacteria (MHB) was created. Five main actions of MHB on mycorrhizae were proposed: in the receptivity of root to...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Mycorrhization Helper Bacteria; MHB; Ectomycorrhizal fungi; Pseudomonas.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822010000400002
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