Senescence in Detached Betel Leaves: Role of the Petiole

Science  23 Jan 1970:
Vol. 167, Issue 3917, pp. 387-388
DOI: 10.1126/science.167.3917.387


Removal of the petiole from detached betel leaves delays onset of leaf senescence; the delay is nearly proportional to the extent of depetiolation. An agar diffusate from intact midrib or excised petioles induces normal senescence in depetiOlated leave.