Official websites use. Share sensitive information only on official, secure websites. Correspondence: liebe ifz-goettingen. A comparative transcriptome analysis was performed to elucidate transcriptomic changes associated with disease development.
Both viruses reprogrammed the transcriptional network, but a large number of transcription factors involved in plant defence were upregulated in BNYVV-infected plants. A strong activation of pathogenesis-related proteins by both viruses suggests a salicylic acid or jasmonic acid mediated-defence response, but the data also indicate that both viruses counteract the SA-mediated defence. The ethylene signal transduction pathway was strongly downregulated which probably increases the susceptibility of sugar beet to Benyvirus infection.
Keywords: auxin, Benyvirus , plant hormone, pathogenesis related protein, resistance, salicylic acid, transcriptome. Beet necrotic yellow vein virus is the causal agent of rhizomania disease in sugar beet and is distributed worldwide [ 2 ], whereas BSBMV occurs only in sugar beet growing areas in the United States [ 3 , 4 ]. Both viruses are transmitted by the soil-borne plasmodiophoromycete Polymyxa betae that infects the root tissue of young sugar beet plants [ 5 , 6 ].
Resting spores of the plasmodiophoromycete containing infectious virus particles can survive in the soil for decades. Although, both viruses are closely related species with a similar host range and the same vector species, symptoms induced in their major host plant sugar beet show marked differences [ 7 ]. Roots of BNYVV-infected plants display severe disease symptoms including reduced size, deformation, and necrosis of vascular tissue.
Extensive proliferation of lateral roots LRs leading to a root beard is the characteristic feature of rhizomania disease. The symptoms in systemically infected leaves are characterized by vein yellowing and necrosis but are seldom observed in the field. In contrast, symptoms of BSBMV-infected plants are mainly restricted to leaves that display light yellow vein banding, mottling, mosaic patterns, and growth disorders.
