Photocontrol of Parasitism in a Parasitic Flowering Plant, Cuscuta japonica Chois, Cultured in Vitro

Far-red light induced mutual and self parasitism of Cuscutajaponica in vitro. Blue light was less effective than far-redlight because of its weak effect on induction of haustoria,although it stimulated mutual twining of stems. No parasitismwas observed under white or red light, or in darkness. (Received August 5, 1994; Accepted February 9, 1995)