Abscisic Acid Induces Formation of Floating Leaves in the Heterophyllous Aquatic Angiosperm Potamogeton nodosus

Science  22 Sep 1978:
Vol. 201, Issue 4361, pp. 1135-1138
DOI: 10.1126/science.201.4361.1135


Potamogeton nodosus tubers produce floating-type instead of submersed-type leaves when exposed to 10–5 molar synthetic abscisic acid. Abscisic acid-induced leaves have stomata on upper leaf surfaces and higher width/length ratios than controls. These effects are wholly or partially overcome by simultaneous exposure to abscisic acid combined with gibberellic acid, kinetin, or benzyladenine.