ATP8A1 and infection: The potential role of AtPP2-A3 and AtPP2-A8 genes in infection of A. thaliana roots and development of syncytia induced by beet cyst nematode (H. schachtii) was explored using T-DNA mutants (pp2-a3-1, pp2-a3-2, and pp2-a8-1), overexpressing lines (PP2-A3oe7/1, PP2-A3oe9/5, PP2-A3oe10/7, PP2-A8oe2/5, PP2-A8oe5/3, and PP2-A8oe8/2) and Col-0 wild-type plants.