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Abstract:

Neotyphodium endophytes and arbuscular mycorrhizal (AM) fungi are common constituents of natural grasslands. The plant-endophyte symbiosis can introduce changes in soil conditions that affect the density and activity of different functional groups of soil organisms. In the present work we performed in vitro assays to evaluate the effect of root and endophyte exudates on the pre-infective state of mycorrhizal fungi (Gigaspora margarita and G. rosea). Plant roots of Bromus setifolius from populations of Patagonia, and four strains of Neotyphodium were used to obtain the exudates. Root exudates of infected plants, at a high concentration, significantly increased AMF hyphal branches and length relative to exudates from naturally endophyte free plants. The effect of Neotyphodium endophyte exudates on AMF mycelial length varied depending on strain and the concentration used, suggesting a differential interaction between endophyte and AMF species. AMF hyphal branches were increased by Neotyphodium fungal exudates in both mycorrhizal species. A few previous studies have suggested that Neotyphodium endophytes can reduce mycorrhizal sporulation and colonization of host roots in commonly-cultivated agronomic hosts. In this study we report the opposite effect in B. setifolius. This study reports the direct and positive effect of root exudates from plants in symbiosis with Neotyphodium, on AMF pre-infective state. Further, identical effects were detected using exudates from Neotyphodium endophytes. © 2011 Springer Science+Business Media B.V.

Registro:

Documento: Artículo
Título:Evidence for leaf endophyte regulation of root symbionts: Effect of Neotyphodium endophytes on the pre-infective state of mycorrhizal fungi
Autor:Novas, M.V.; Iannone, L.J.; Godeas, A.M.; Scervino, J.M.
Filiación:Departamento de Biodiversidad y Biología Experimental, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Av. Intendente Güiraldes 2160. Pab. II, 4 piso, C1428EHA Buenos Aires, Argentina
Departamento de Ingeniería Química, Facultad de Ingeniería, Universidad de Buenos Aires, Buenos Aires, Argentina
Lab. Microbiología Del Suelo, Departamento de Biodiversidad y Biología Experimental, Universidad de Buenos Aires, Buenos Aires, Argentina
Palabras clave:Arbuscular mycorrhiza; Bromus setifolius; Endophytes; Interaction; Native grass; Neotyphodium; agronomy; bioassay; colonization; endophyte; functional group; fungus; grass; grassland; host-symbiont interaction; infectivity; mycorrhiza; native species; root; soil microorganism; sporulation; symbiont; Arbuscular; Bromus; Bromus setifolius; Fungi; Gigaspora margarita; Neotyphodium
Año:2011
Volumen:55
Número:1
Página de inicio:19
Página de fin:28
DOI: http://dx.doi.org/10.1007/s13199-011-0140-4
Título revista:Symbiosis
Título revista abreviado:Symbiosis
ISSN:03345114
CODEN:SYMBE
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03345114_v55_n1_p19_Novas

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Citas:

---------- APA ----------
Novas, M.V., Iannone, L.J., Godeas, A.M. & Scervino, J.M. (2011) . Evidence for leaf endophyte regulation of root symbionts: Effect of Neotyphodium endophytes on the pre-infective state of mycorrhizal fungi. Symbiosis, 55(1), 19-28.
http://dx.doi.org/10.1007/s13199-011-0140-4
---------- CHICAGO ----------
Novas, M.V., Iannone, L.J., Godeas, A.M., Scervino, J.M. "Evidence for leaf endophyte regulation of root symbionts: Effect of Neotyphodium endophytes on the pre-infective state of mycorrhizal fungi" . Symbiosis 55, no. 1 (2011) : 19-28.
http://dx.doi.org/10.1007/s13199-011-0140-4
---------- MLA ----------
Novas, M.V., Iannone, L.J., Godeas, A.M., Scervino, J.M. "Evidence for leaf endophyte regulation of root symbionts: Effect of Neotyphodium endophytes on the pre-infective state of mycorrhizal fungi" . Symbiosis, vol. 55, no. 1, 2011, pp. 19-28.
http://dx.doi.org/10.1007/s13199-011-0140-4
---------- VANCOUVER ----------
Novas, M.V., Iannone, L.J., Godeas, A.M., Scervino, J.M. Evidence for leaf endophyte regulation of root symbionts: Effect of Neotyphodium endophytes on the pre-infective state of mycorrhizal fungi. Symbiosis. 2011;55(1):19-28.
http://dx.doi.org/10.1007/s13199-011-0140-4