EIF4E and infection: Constitutive expression of potato4E:pvr12, a modified Russet Burbank potato eIF4E that contained three mutations (I70N, L82R and D112N) similar to the amino acid substitutions in the natural PVY-resistance pvr12 allele in Capsicum annuum, protected tetraploid Russet Burbank, Russet Norkotah, and Atlantic potato cultivars from PVYO, PVYN:O and PVYNTN infection [27, 28, 30].