Archives of Phytopathology and Plant Protection (2010) 43, 1643-1657

Maria Luisa Izaguirre-Mayoral and Mario Jose Garrido (2010)
Propyl gallate, a free radical scavenger, counteracts the benefits of exogenously applied salicylic acid and aggravates the deleterious effects of the Southern bean mosaic virus in Rhizobium-nodulated Phaseolus vulgaris plants
Archives of Phytopathology and Plant Protection 43 (16), 1643-1657
Abstract: Infection of Rhizobium-nodulated Phaseolus vulgaris by the southern bean mosaic virus (SBMV) markedly decreased the growth and nodulation of plants. Exogenous applications of salicylic acid (SA) at concentrations > 10 μM further decreased growth and nodulation of virus-infected (V) plants. Only SA concentration of 5 μM in the solution improved the growth, nodulation, chlorophyll concentration and the catabolism of ureide in leaves of V plants. The spray of leaves with 2 mM propyl gallate (+Pg) decreased growth, nodulation as well as the chlorophyll and leaf ureide concentrations in V plants, regardless of the concentration of SA at which plants were grown. Ultrastructural damages in leaf cells caused by SBMV were also enhanced in V+Pg plants. The massive proliferation of virus particles and the presence of virus crystalline arrays within symbiosomes of nodules in V+Pg plants were attributed to proliferation of branched plasmodesmata in leaf vascular-parenchyma cell walls that facilitated virus movement. Virus particles were never observed in leaf and nodule tissues of V plants not sprayed with Pg. Exogenous applications of SA hindered while Pg increased the symbiotic performance of H plants, pointing out the complexity to be addressed in breeding for virus resistance in Rhizobium-nodulated beans.
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Link to article at publishers website
Database assignments for author(s): Maria Luisa Izaguirre-Mayoral

Research topic(s) for pests/diseases/weeds:
general biology - morphology - evolution

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Southern bean mosaic virus	Beans (Phaseolus)