Disruption of a gene predicted to encode a solute binding protein of an ABC transporter reduces transmission of Spiroplasma citri by the leafhopper Circulifer haematoceps

Applied and Environmental Microbiology
A BoutareaudColette Saillard

Abstract

Spiroplasma citri is transmitted from plant to plant by phloem-feeding leafhoppers. In an attempt to identify mechanisms involved in transmission, mutants of S. citri affected in their transmission must be available. For this purpose, transposon (Tn4001) mutagenesis was used to produce mutants which have been screened for their ability to be transmitted by the leafhopper vector Circulifer haematoceps to periwinkle plants. With one mutant (G76) which multiplied in leafhoppers as efficiently as S. citri wild-type (wt) strain GII-3, the plants showed symptoms 4 to 5 weeks later than those infected with wt GII-3. Thirty to fifty percent of plants exposed to leafhoppers injected with G76 remained symptomless, whereas for wt GII-3, all plants exposed to the transmission showed severe symptoms. This suggests that the mutant G76 was injected into plants by the leafhoppers less efficiently than wt GII-3. To check this possibility, the number of spiroplasma cells injected by a leafhopper through a Parafilm membrane into SP4 medium was determined. Thirty times less mutant G76 than wt GII-3 was transmitted through the membrane. These results suggest that mutant G76 was affected either in its capacity to penetrate the salivary glands and/or...Continue Reading

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Citations

Jan 28, 2005·Molecular Plant-microbe Interactions : MPMI·Aurélie AndréJoël Renaudin
Dec 9, 2008·Molecular Plant-microbe Interactions : MPMI·Xiaodong BaiSaskia A Hogenhout
Apr 7, 2010·Applied and Environmental Microbiology·Patricia CarleXavier Foissac
Apr 30, 2008·BMC Genomics·Colette SaillardXavier Foissac
Feb 16, 2010·Biologicals : Journal of the International Association of Biological Standardization·Gail E Gasparich
Aug 19, 2008·Molecular Plant Pathology·Saskia A HogenhoutShigetou Namba
Mar 24, 2016·BMC Microbiology·Marie-Pierre DubranaColette Saillard
Aug 25, 2016·Frontiers in Plant Science·Laura M Perilla-Henao, Clare L Casteel
Mar 13, 2015·FEMS Microbiology Ecology·Luis M BolañosEsperanza Martínez-Romero

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