The rmc locus does not affect plant interactions or defence-related gene expression when tomato (Solanum lycopersicum) is infected with the root fungal parasite, Rhizoctonia

Functional Plant Biology : FPB
Ling-Ling GaoSally Smith

Abstract

A tomato mutant with reduced mycorrhizal colonisation, rmc, confers resistance to almost all arbuscular mycorrhizal (AM) fungal species tested, although there is variation in colonisation of different root cell layers by different fungi and one species of AM fungus can colonise this mutant relatively normally. These variations indicate a high degree of specificity in relation to AM colonisation. We explored the possibility of specificity or otherwise in interactions between rmc and three non-AM root-infecting fungi, Rhizoctonia solani anastomosis groups (AG) 4 and AG8, and binucleate Rhizoctonia (BNR). There were no differences between the wild type tomato 76R and rmc in the speed or extent to which these fungi infected roots or caused disease. Infection by R. solani induced high levels of defence-related gene expression in both tomato genotypes relative to non-infected plants. In contrast, with BNR the expression of these genes was not induced or induced to a much lower extent than with R. solani. The expression of defence-related genes with these two non-AM fungi was very similar in the two plant genotypes. It was different from effects observed during colonisation by AM fungi, which enhanced expression of defence-related gen...Continue Reading

References

Jan 1, 1992·Plant Molecular Biology·S W LeeJ Robb
Aug 16, 2002·Current Opinion in Plant Biology·Barbara N Kunkel, David M Brooks
May 15, 2003·Molecular Plant-microbe Interactions : MPMI·Rakefet David-SchwartzYoram Kapulnik
Jul 10, 2003·Molecular Plant-microbe Interactions : MPMI·Gloria NombelaMariano Muñiz
Jul 3, 2004·Current Opinion in Plant Biology·Martin Parniske

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Citations

Jan 19, 2012·PloS One·Hamid R Asghari, Timothy R Cavagnaro
Aug 1, 2007·Functional Plant Biology : FPB·Timothy R CavagnaroLouise E Jackson

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Datasets Mentioned

BETA
M69248
M80608

Methods Mentioned

BETA
PCR
electrophoresis

Software Mentioned

ImageQuaNT
Genstat

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