Studies on the effects of ammonium salts on rice roots. : (2) Chemotropism of roots.

Abstract

1. Chemotropism of seedling roots of rice was observed in agar. 2. For ammonium ion, roots of paddy rice and upland rice showed chemotropism, but none for nitrate and several other ions. 3. Ammonium and nitrate ions diffused in agar with respective concentration gradients.