
Sweet potato SPAP1 is a typical aspartic protease and participates in ethephon-mediated leaf senescence
Keywords: CCI, chlorophyll content index; DAB, diaminobenzidine; MES, 2-(N-morpholino)ethanesulphonic acid; PSI, plant specific insert; RACE, rapid amplification of cDNA ends; RT-PCR, reverse transcription-polymerase chain reactionAspartic protease; Ethephon; Leaf