Transcription factor that binds DNA motifs 5'-CGT[AG](5N)NACG[ACT][AC][AT][ACG][ACT]-3' and 5'-CACG[ACT][AC][AT][AGT][CT]-3' in target genes promoters. Promotes leaf senescence and reduces fruit yield and sugar content, probably by establishing abscisic acid (ABA) homeostasis. Expressed in roots, stem, flowers, and leaves. Accumulates during age-dependent and dark-induced leaf senescence. The NAC domain includes a DNA binding domain and a dimerization domain. In plants lacking both NAP1 and NAP2, delayed leaf senescence but enhanced fruit yield and sugar content, likely due to prolonged leaf photosynthesis in aging plants.