Application of plant growth-promoting rhizobacteria (PGPR) in combination with a mild strain of Cucumber mosaic virus (CMV) associated with viral satellite RNAs to enhance growth and protection against a virulent strain of CMV in tomato

An indigenous strain of Cucumber mosaic virus (CMV) associated with a naturally occurring benign viral satellite RNA (345 bp long), referred to as CMV-KU1, although effective as a protective biocontrol agent against the damaging effects of the virulent CMV-16 strain, produced negative side-effects s...

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Bibliographic Details
Published in:Canadian journal of plant pathology 2012-04, Vol.34 (2), p.177-186
Main Authors: Dashti, Narjes H, Ali, Nedaa Y, Cherian, Vineetha M, Montasser, Magdy S
Format: Article
Language:English
Subjects:
adverse effects
ARN satellite du virus
Benign
biological control
biological control agents
Cucumber mosaic virus
disease prevention
enzyme-linked immunosorbent assay
fruit yield
greenhouse experimentation
growth retardation
lutte intégrée
pathogens
plant growth-promoting rhizobacteria
Pseudomonas aeruginosa
rhizobactéries bénéfiques à la croissance des plantes
satellite RNA
Solanum
Stenotrophomonas
tomate
tomato
tomatoes
vegetative growth
vigor
viral satellite RNA
virulent strains
virus de la mosaïque du concombre
viruses
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Summary:An indigenous strain of Cucumber mosaic virus (CMV) associated with a naturally occurring benign viral satellite RNA (345 bp long), referred to as CMV-KU1, although effective as a protective biocontrol agent against the damaging effects of the virulent CMV-16 strain, produced negative side-effects such as mild stunting, vigour reduction and about 20% yield loss in tomato (Solanum lycopersicon L.) plants. The efficacy of using a mixture of two plant growth-promoting rhizobacteria (PGPR) strains, Pseudomonas aeruginosa and Stenotrophomonas rhizophilia, to compensate for vegetative and yield loss caused by CMV-KU1 in tomato plants, was evaluated in greenhouse experiments. In addition to promoting plant growth, PGPRs are known to enhance systemic defences in plants against foliar pathogens such as viruses that attack tissues distant to PGPR sphere of activity. The use of PGPR and CMV-KU1 together successfully promoted vegetative growth and fruit yield in tomato plants to values equivalent to that of the healthy controls. The combination used also enhanced overall protection of the plants against the severe CMV-16 virus with about 91.3% disease prevention. Serological analysis using enzyme-linked immunosorbent assay (ELISA) also indicated a lower incidence of CMV-16 infection in protected test plants.
ISSN:1715-2992
0706-0661
1715-2992
DOI:10.1080/07060661.2012.685495