(Ahn et al., 2005; Tunc-Ozdemir et al., 2009). Ahn et al. (2005) have shown that spraying with thiamine increased
resistance to fungal, bacterial and viral infections both in Arabidopsis thaliana, rice and cucumber. It was also shown that reduced expression of a rice gene with a putative function in thiamine biosynthesis was associated with lower resistance towards bacterial pathogens and that the resistance could be complemented with exogenous thiamine