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魔芋为天南星科、魔芋属植物的块根.我国主要分布在南方各省山地高原区,资源十分丰富.魔芋经加工后制成的精粉,主要含葡甘聚糖,其特点是具有很强的吸水性,吸水膨胀80～100倍.膨胀后的葡甘聚糖,在加热的碱液中则转化为不可逆的凝胶.利用这一特性,代替琼脂制备食用菌斜面培养基,可降低生产成本.
Konjac is Araceae, konjac root tuber.Our country is mainly distributed in the mountainous plateau area of the southern provinces, the resource is very rich.Konjac processed refined flour, mainly containing glucomannan, which is characterized by a strong water absorption The water-swelling is 80 to 100. The expanded glucomannan is transformed into an irreversible gel in the heated lye, which can reduce the production cost by using the agar to prepare the edible fungi slant culture medium.