A nucleic acid molecule complementary to all or part of a sequence selected from the group consisting of SEQ ID NO:1684, SEQ ID NO:1685, SEQ ID NO:1686 and SEQ ID NO:1687, wherein the expression of the nucleic acid molecule as antisense RNA blocks the expression of D. v. virgifera V-ATPASE, and wherein the nucleic acid molecule hybridizes to a sequence selected from the group consisting of SEQ ID NO:1684, SEQ ID NO:1685, SEQ ID NO:1686 and SEQ ID NO:1687 under wash conditions of 0.2×SSC at 65° C., and wherein the nucleic acid molecule is operably linked to a heterologous promoter that causes transcription of DNA in plant cells.