Isolation and expression analysis of an ABSCISIC ACID-INSENSITIVE 3 (ABI3) homologue from Populus trichocarpa

Abstract

An ABSCISIC ACID-INSENSITIVE 3 (ABI3) homologous gene was isolated from poplar (Populus trichocarpa). The deduced protein of 736 amino acids showed sequence similarity to other VP1/ABI3 proteins within four regions. PtABI3 is encoded by a single gene in poplar and, as in Arabidopsis, highly expressed in developing seeds.