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Abstract:

Ferns, which are usually colonizing different environments and their roots frequently present mycorrhization, have two adult stages in their life cycle, the sporophytic and the gametophytic phase. This paper describes the experimental mycorrhizal association between Pteris vittata leptosporangiate fern and a strain of Glomus intraradices during the life cycle of the fern, from spore germination to the development of a mature sporophyte. The aim of this study was to compare the colonization pattern of in vitro cultures of G. intraradices along the fern life cycle with those found in nature. For this, mature spores were obtained from fertile P. vittata fronds growing in walls of Buenos Aires city, Argentina. Roots were stained and observed under the light microscope for arbuscular mycorrhizal colonization. Approximately, 75 fern spores were cultured in each pot filled with a sterile substrate and G. intraradices (BAFC N° 51.331) as inoculum on the surface. After germination took place, samples were taken every 15 days until the fern cycle was completed. In order to determine colonization dynamics each sample was observed under optical and confocal microscope after staining. Gametophyte was classified as Adiantum type. Male and female gametangia were limited to the lower face, mycorrhizal colonization started when they were differentiated and took place through the rhizoids. Spores and vesicles were not found in this cycle stage. Paris-type mycorrhizal colonization was established in the midrib and in the embrionary foot. It was colonized by external mycelium. When the first root was developed soil inoculum colonized de novo this structure and Arum-type colonization was observed. This study proves that the type of colonization is determined by the structure of the host, not by the fungus. Both the gametophyte and embryo foot have determined growth and Paris-type colonization, while, sporophyte roots have undetermined growth and Arum-type colonization. The structures found in vitro cultures were highly similar to those found under natural conditions.

Registro:

Documento: Artículo
Título:Mycorrhizal association in gametophytes and sporophytes of the fern Pteris vittata (Pteridaceae) with Glomus intraradices
Autor:Martinez, A.E.; Chiocchio, V.; Em, L.T.; Rodriguez, M.A.; Godeas, A.M.
Filiación:Departamento de Biodiversidad y Biología Experimental, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Av. Int. Güiraldes s/N, Pabellón II, Ciudad Universitaria. 1428, Buenos Aires, Argentina
Cátedra de Microbiología Agrícola y Ambiental, Facultad de Agronomía, Universidad de Buenos Aires, Av. San Martín 4453, 1417. Buenos Aires, Argentina
INBA, CONICET, Argentina
Palabras clave:Arum colonization; Glomus intraradices; Paris colonization; Pteridophyta-gametophyte-sporophyte; Pteris vittata; article; bacterial spore; brake fern; flower; Glomeromycota; microbiology; mycorrhiza; physiology; Germ Cells, Plant; Glomeromycota; Mycorrhizae; Pteris; Spores; Adiantum; Arbuscular; Arum; Bacteria (microorganisms); Filicophyta; Fungi; Glomus intraradices; Pteridaceae; Pteridium; Pteridophyta; Pteris; Pteris vittata
Año:2012
Volumen:60
Número:2
Página de inicio:857
Página de fin:865
Título revista:Revista de Biologia Tropical
Título revista abreviado:Rev. Biol. Trop.
ISSN:00347744
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00347744_v60_n2_p857_Martinez

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Citas:

---------- APA ----------
Martinez, A.E., Chiocchio, V., Em, L.T., Rodriguez, M.A. & Godeas, A.M. (2012) . Mycorrhizal association in gametophytes and sporophytes of the fern Pteris vittata (Pteridaceae) with Glomus intraradices. Revista de Biologia Tropical, 60(2), 857-865.
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00347744_v60_n2_p857_Martinez [ ]
---------- CHICAGO ----------
Martinez, A.E., Chiocchio, V., Em, L.T., Rodriguez, M.A., Godeas, A.M. "Mycorrhizal association in gametophytes and sporophytes of the fern Pteris vittata (Pteridaceae) with Glomus intraradices" . Revista de Biologia Tropical 60, no. 2 (2012) : 857-865.
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00347744_v60_n2_p857_Martinez [ ]
---------- MLA ----------
Martinez, A.E., Chiocchio, V., Em, L.T., Rodriguez, M.A., Godeas, A.M. "Mycorrhizal association in gametophytes and sporophytes of the fern Pteris vittata (Pteridaceae) with Glomus intraradices" . Revista de Biologia Tropical, vol. 60, no. 2, 2012, pp. 857-865.
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00347744_v60_n2_p857_Martinez [ ]
---------- VANCOUVER ----------
Martinez, A.E., Chiocchio, V., Em, L.T., Rodriguez, M.A., Godeas, A.M. Mycorrhizal association in gametophytes and sporophytes of the fern Pteris vittata (Pteridaceae) with Glomus intraradices. Rev. Biol. Trop. 2012;60(2):857-865.
Available from: https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00347744_v60_n2_p857_Martinez [ ]