Amorphophallus muelleri Blume synonym of A. oncophyllus (porang) is one of the species of
porang that grows in Indonesia, especially in East Java. It has a high economic value
because the tubers contain glucomannan. Earlier work reported that harvest timing and
length of storage affected secondary metabolite containing on plants. The study objective
was to determine the glucomannan content of porang at 1, 2 months before dormant, at
dormant and length of storage time (1 and 2 months after dormant) at room temperature …