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 (developmental, light-induced and ABA-induced senescence) and regulates fruit yield and sugar content, probably by establishing abscisic acid (ABA) homeostasis. Activates the expression of senescence and ABA associated genes including NCED1, ABCG40, CYP707A2, SAG113, SGR1 and PAO, by directly binding to their promoters. Expressed in roots, stem, flowers, and leaves. Accumulates during age-dependent and dark-induced leaf senescence. Induced by abscisic acid (ABA). The NAC domain includes a DNA binding domain and a dimerization domain. Delayed leaf senescence (including delayed leaf yellowing phenotype under darkness or after ABA treatment) but enhanced fruit yield and sugar content, likely due to prolonged leaf photosynthesis in aging plants; these phenotypes are increased in plants lacking both NAP1 and NAP2.