Identification of amino acids of the beet necrotic yellow vein virus p25 protein required for induction of the resistance response in leaves of Beta vulgaris plants

The Journal of General Virology
Soutaro ChibaTetsuo Tamada

Abstract

The RNA3-encoded p25 protein of beet necrotic yellow vein virus (BNYVV) is responsible for the production of rhizomania symptoms of sugar beet roots (Beta vulgaris subsp. vulgaris). Here, it was found that the presence of the p25 protein is also associated with the resistance response in rub-inoculated leaves of sugar beet and wild beet (Beta vulgaris subsp. maritima) plants. The resistance phenotype displayed a range of symptoms from no visible lesions to necrotic or greyish lesions at the inoculation site, and only very low levels of virus and viral RNA accumulated. The susceptible phenotype showed large, bright yellow lesions and developed high levels of virus accumulation. In roots after Polymyxa betae vector inoculation, however, no drastic differences in virus and viral RNA accumulation levels were found between plants with susceptible and resistant phenotypes, except at an early stage of infection. There was a genotype-specific interaction between BNYVV strains and two selected wild beet lines (MR1 and MR2) and sugar beet cultivars. Sequence analysis of natural BNYVV isolates and site-directed mutagenesis of the p25 protein revealed that 3 aa residues at positions 68, 70 and 179 are important in determining the resistanc...Continue Reading

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Sep 28, 2005·The Journal of General Virology·Audrey SchirmerOlivier Lemaire

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Citations

Oct 7, 2003·Annual Review of Phytopathology·Charles M Rush
Jan 24, 2009·Molecular Plant Pathology·Graham R D McGrannMark Stevens
Jan 12, 2012·Genetika·A K Butorina, A V Kornienko
Dec 29, 2020·EFSA Journal·UNKNOWN EFSA Panel on Plant Health (PLH)Claude Bragard

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