Common gene expression in Medicago truncatula roots in response to Pseudomonas fluorescens colonization, mycorrhiza development and nodulation

•  Beneficial rhizosphere microorganisms may share similar molecular steps during root colonization. To test this hypothesis, we compared Medicago truncatula Gaertn. gene expression in roots colonized, or not colonized, by Glomus mosseae BEG12, Pseudomonas fluorescens C7R12 or Sinorhizobium meliloti...

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Veröffentlicht in:The New phytologist. - 1979. - 161(2004), 3 vom: 20. März, Seite 855-863
1. Verfasser: Sanchez, L (VerfasserIn)
Weitere Verfasser: Weidmann, S, Brechenmacher, L, Batoux, M, Van Tuinen, D, Lemanceau, P, Gianinazzi, S, Gianinazzi-Pearson, V
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2004
Zugriff auf das übergeordnete Werk:The New phytologist
Schlagworte:Journal Article Glomus mosseae Medicago truncatula Pseudomonas fluorescens Sinorhizobium meliloti gene expression root colonization
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520 |a •  Beneficial rhizosphere microorganisms may share similar molecular steps during root colonization. To test this hypothesis, we compared Medicago truncatula Gaertn. gene expression in roots colonized, or not colonized, by Glomus mosseae BEG12, Pseudomonas fluorescens C7R12 or Sinorhizobium meliloti 2011. •  Pseudomonas fluorescens C7R12 formed colonies on the surface of M. truncatula roots and colonized root tissues intercellularly and intracellularly in a way similar to that previously described for other plants. •  Semiquantitative reverse transcriptase polymerase chain reaction of a set of 12 mycorrhiza upregulated M. truncatula genes revealed different expression profiles in roots 3 weeks after inoculation with P. fluorescens or S. meliloti. Pseudomonas fluorescens colonization activated seven of the plant genes while nodulated root systems showed increased expression in only three genes and five appeared to be downregulated. •  This first report of similar gene induction by a fluorescent pseudomonad and a mycorrhizal fungus in roots supports the hypothesis that some plant cell programmes may be shared during root colonization by these beneficial microorganisms. Less similarity existed in expression of the gene set with nodulation by S. meliloti 
650 4 |a Journal Article 
650 4 |a Glomus mosseae 
650 4 |a Medicago truncatula 
650 4 |a Pseudomonas fluorescens 
650 4 |a Sinorhizobium meliloti 
650 4 |a gene expression 
650 4 |a root colonization 
700 1 |a Weidmann, S  |e verfasserin  |4 aut 
700 1 |a Brechenmacher, L  |e verfasserin  |4 aut 
700 1 |a Batoux, M  |e verfasserin  |4 aut 
700 1 |a Van Tuinen, D  |e verfasserin  |4 aut 
700 1 |a Lemanceau, P  |e verfasserin  |4 aut 
700 1 |a Gianinazzi, S  |e verfasserin  |4 aut 
700 1 |a Gianinazzi-Pearson, V  |e verfasserin  |4 aut 
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