The Occurrence of Gibberellin-like Substances in Cereal Grasses

Abstract

The occurrence of gibberellin-like substances in extracts of shoots, roots and immature grains of rice and maize, and shoots and immature grains of wheat was examined by the rice seedling method after chromatography on paper with ammoniacal iso-propanol.
Gibberellin-like substances were present in amounts approximately equivalent to 0.1-0.5μg. of gibberellin A₃ per 100g. fresh weight in shoots and roots, and 0.5-1.5μg. in immature grains.
The necessity for the use of intact green plants for bioassay of hormones, which are responsible for elongation in shoots, is discussed.