Phytoene synthase, Auxin response protein, Glutamate descarboxilase, Glutamate dehydrogenase 2 (GDH2), Cysteine proteinase (RD21A), Invertase/pectin methylesterase inhibitor family protein, CBL-interacting protein kinase 6 (CIPK6) exhibited reduced expression in PNRSV, PLMVd and PNRSV-PLMVd infected samples compared to the healthy control plants, and Glutamate decarboxylase was induced upon infection. The gene discussed is GLUD2; the disease is infection.