Plant growth regulators from the edible mushroom Leccinum extremiorientale

Two compounds were isolated from the edible mushroom Leccinum extremiorientale. In the bioassay examining plant growth regulatory activity using lettuce, compound 1 promoted the root growth as low as 100 nmol/paper dose-dependently and inhibited the hypocotyl growth at 1000 nmol/paper. Compound 2 inhibited the root and hypocotyl growth at 1000 nmol/paper.