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Strigolactones stimulate arbuscular mycorrhizal fungi by activating mitochondria

Besserer, Arnaud ; Puech-Pagès, Virginie ; Kiefer, Patrick ; Gomez-Roldan, Victoria ; Jauneau, Alain ; Roy, Sébastien ; Portais, Jean-Charles ; Roux, Christophe ; Bécard, Guillaume ; Séjalon-Delmas, Nathalie Chory, Joanne

PLoS biology, 2006-07, Vol.4 (7), p.e226-e226 [Periódico revisado por pares]

United States: Public Library of Science

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Título:
Strigolactones stimulate arbuscular mycorrhizal fungi by activating mitochondria
Autor: Besserer, Arnaud ; Puech-Pagès, Virginie ; Kiefer, Patrick ; Gomez-Roldan, Victoria ; Jauneau, Alain ; Roy, Sébastien ; Portais, Jean-Charles ; Roux, Christophe ; Bécard, Guillaume ; Séjalon-Delmas, Nathalie
Chory, Joanne
Assuntos: Botany ; Daucus carota - chemistry ; Ecology ; Fungi ; Fungi - growth & development ; Germination ; Gigaspora rosea ; Glomus intraradices ; Hyphae - drug effects ; Hyphae - growth & development ; Lactones - analysis ; Lactones - pharmacology ; Lotus ; Microbiology ; Microscopy ; Mitochondria ; Mitochondria - drug effects ; Mitochondria - metabolism ; Mycorrhizae - drug effects ; Mycorrhizae - growth & development ; Mycorrhizae - metabolism ; Orobanchaceae - growth & development ; Orobanche ; Plant Roots - chemistry ; Plant Science ; Plants ; Seeds ; Seeds - growth & development ; Sesquiterpenes - analysis ; Sesquiterpenes - pharmacology ; Soil microorganisms ; Sorghum ; Sorghum - chemistry ; Spores, Fungal - physiology ; Striga ; Studies ; Yeast and Fungi
É parte de: PLoS biology, 2006-07, Vol.4 (7), p.e226-e226
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
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Descrição: The association of arbuscular mycorrhizal (AM) fungi with plant roots is the oldest and ecologically most important symbiotic relationship between higher plants and microorganisms, yet the mechanism by which these fungi detect the presence of a plant host is poorly understood. Previous studies have shown that roots secrete a branching factor (BF) that strongly stimulates branching of hyphae during germination of the spores of AM fungi. In the BF of Lotus, a strigolactone was found to be the active molecule. Strigolactones are known as germination stimulants of the parasitic plants Striga and Orobanche. In this paper, we show that the BF of a monocotyledonous plant, Sorghum, also contains a strigolactone. Strigolactones strongly and rapidly stimulated cell proliferation of the AM fungus Gigaspora rosea at concentrations as low as 10(-13) M. This effect was not found with other sesquiterperne lactones known as germination stimulants of parasitic weeds. Within 1 h of treatment, the density of mitochondria in the fungal cells increased, and their shape and movement changed dramatically. Strigolactones stimulated spore germination of two other phylogenetically distant AM fungi, Glomus intraradices and Gl. claroideum. This was also associated with a rapid increase of mitochondrial density and respiration as shown with Gl. intraradices. We conclude that strigolactones are important rhizospheric plant signals involved in stimulating both the pre-symbiotic growth of AM fungi and the germination of parasitic plants.
Editor: United States: Public Library of Science
Idioma: Inglês

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Strigolactones stimulate arbuscular mycorrhizal fungi by activating mitochondria

Besserer, Arnaud ; Puech-Pagès, Virginie ; Kiefer, Patrick ; Gomez-Roldan, Victoria ; Jauneau, Alain ; Roy, Sébastien ; Portais, Jean-Charles ; Roux, Christophe ; Bécard, Guillaume ; Séjalon-Delmas, Nathalie Chory, Joanne

United States: Public Library of Science

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