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Martinez, C.; Buée, Marc; Jauneau, Alain; Bécard, Guillaume; Dargent, R.; Roux, Christophe

doi:10.1023/a:1012776919384

Cited by 13 publications

(9 citation statements)

References 19 publications

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“…with the same result, indicating no effects on their growth [30]. Another study conducted in 2001 by Martinez et al [33] showed that fractions of maize root exudates could induce the transition of yeast to a hyphal form. In later research, Sabbagh [34] analyzed the transcriptome expression of a haploid strain of S. reilianum using different concentrations of GR24, and most of the expressed sequence tag (EST) after SL application was related to genes taking part in cell respiration processes.…”

Section: Strigolactones and Pathogenic Fungimentioning

confidence: 53%

Strigolactones as mediators between fungi and plants

Kowalczyk

Hrynkiewicz

2018

Acta Mycol

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A constantly changing environment is challenging for all organisms on Earth, especially for terrestrial plants, which face several environmental stresses despite their static way of life. In attempts to understand the mechanisms responsible for plant growth and development, scientists have recently focused on a small group of carotenoid derivatives called “strigolactones” (SLs), which are synthesized mostly in the roots in response to a variety of external factors. Strigolactones are compounds that define plant plasticity towards many environmental factors, including the establishment of mycorrhizal symbiosis under nutrient-deficient conditions. As exogenous signals, they can stimulate the branching of arbuscular mycorrhizal fungal (AMF) hyphae and as endogenous signals they adjust a plant architecture, including changes within the roots, allowing host plant and fungi to meet. SLs can also function as signaling molecules that allow colonization and establishment of the later stages of mutualistic symbioses between organisms such as AMF. SLs act on AMF metabolism by stimulating its mitochondrial respiration. Genes encoding enzymes crucial for SL biosynthesis – CCD7 and CCD8 – are also found in gymnosperm genomes, which encourages speculation that strigolactones may also be part of a host-plant and ectomycorrhizal fungi signaling pathway during the establishment of symbiosis. Nevertheless, SLs impact on ectomycorrhiza formation remain unknown. The broad spectrum of SL bioactivity has made these compounds valuable from an industrial perspective. In the future, SLs may be commercialized in plant protection products, biostimulants, or as substances used in genetic engineering to allow the creation of crops capable of growing under disadvantageous conditions.

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Section: Strigolactones and Pathogenic Fungimentioning

confidence: 53%

Strigolactones as mediators between fungi and plants

Kowalczyk

Hrynkiewicz

2018

Acta Mycol

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“…lycopersici. Martinez et al (2001) reported that the fractions of root exudates could induce physiological transition (haploid to mycelium) of haploid strain of S. reilianum on artificial medium. They found that strigolactones do not affect the microconodial germination of the fungus.…”

Section: Discussionmentioning

confidence: 99%

“…Strigolactones are also important signals for arbuscular mycorrhizal fungi (AMF) (Akiyama and Hayashi, 2006;Besserer et al, 2006) which induce spore germination of Gigaspora margarita at below nanomolar concentration (Besserer et al, 2006). Other effects of strigolactones on fungi have been reported (Martinez et al, 2001;Sabbagh et al, 2008;Steinkellner et al, 2007). However, nothing is known about the role of strigolactones in interactions between the root and soil-inhabiting pathogenic fungi.…”

Section: Introductionmentioning

confidence: 99%

“…Solopathogenic strains of smut fungi in their sporidial (diploid) form are easily manipulated for in vitro assays. Martinez et al (2001) reported that the fractions of root exudates could induce physiological transition from haploid spordial stage to mycelial form in a strain of S. reilianum on artificial medium. The objective of this study was to test the effect of GR24 on metabolic and defense gene expression, cell respiration and inducition of changes in morphology in solopathogenic strain of S. reilianum (Sabbagh et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

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Effect of GR24, a synthetic analogue of strigolactones, on gene expression of solopathogenic strain of Sporisorium reilianum

Sabbagh¹

2011

Afr. J. Biotechnol.

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Sporisorium reilianum f.sp zeae, a basidiomycetous fungus belonging to Ustilaginaceae, is the causal agent of maize head smut. Its pathogenicity is initiated by fusion of two compatible sporidia which give rise to the formation of a dikaryotic pathogenic hyphe. In addition, pathogenic dimorphic diploid strains called solopathogens can be formed where no mating occurs. Strigolactones are the trace molecules in plant root exudates perceived by some fungi at subnanomolar concentrations that have been implicated in inducing spore germination in fungi. Cell respiration in fungal cells was measured through polarography and fluorescence assay. GR24, a synthetic analogue of strigolactones, induced a burst of cell respiration 1 h after adding GR24 (10-7 M) that gradually decreased at 5 and 8 h after addition of GR24. Quantitative polymerase chain reaction (qPCR) analysis showed that transcription levels of genes involved in cell respiration and a 12 kDa heat shock protein were up-regulated 1 h after the addition of GR24 to a culture of the solopathogenic strain but no influence was observed on the other pathogenicity genes and on the culture morphology. These results suggest that strigolactones influence the rhizosphere and play a role in plant-microbe interactions

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“…zeae, is a dimorphic phytopathogenic fungus with a haploid saprophytic phase and a diploid parasitic phase. The disease cycle starts when teliospores present in ears and tassels are carried by the wind and rain to be finally settled in the soil (Martinez et al, 2001), where they can survive up to five years (Matyac and Kommedahl, 1986). The fungus…”

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confidence: 99%

Resistance to Sporisorium reilianum f. sp. zeae in native maize germplasm

Márquez-Licona

Castillo-González

Vargas-Hernández

et al. 2020

RMF

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El carbón de la espiga del maíz (Sporisorium reilianum f. sp. zeae) es una enfermedad que se caracteriza porque el patógeno remplaza las inflorescencias por soros llenos de teliosporas. El objetivo de este estudio fue investigar la respuesta en campo de 55 poblaciones de maíz nativo a la infección por S. reilianum. Las poblaciones de maíz se colectaron en los estados de Guerrero (13), Oaxaca (13), Puebla (seis), Tlaxcala (12) y Estado de México (11). La semilla fue inoculada con teliosporas del patógeno, usando grenetina como adherente. El híbrido Az 41801 se utilizó como testigo. Las poblaciones fueron evaluadas en Mixquiahuala, Hidalgo, en los ciclos 2015 y 2016. La incidencia de la enfermedad se registró mediante la observación directa de signos y síntomas en las inflorescencias. La incidencia máxima de la enfermedad en las poblaciones de maíz fue de 28.8% y 22.2% en la primera y segunda evaluación, respectivamente, mientras que el testigo (Az 41801) presentó una incidencia de 70.7% y 42.3%. Considerando el origen geográfico, los maíces del Estado de México y Tlaxcala presentaron una menor incidencia de la enfermedad respecto al resto de las poblaciones, lo que indica la presencia de genes de resistencia a la enfermedad.

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Untitled

Cited by 13 publications

References 19 publications

Strigolactones as mediators between fungi and plants

Strigolactones as mediators between fungi and plants

Effect of GR24, a synthetic analogue of strigolactones, on gene expression of solopathogenic strain of Sporisorium reilianum

Resistance to Sporisorium reilianum f. sp. zeae in native maize germplasm

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