Keywords: 
• botany /
• ABC transporter /
• structure /
• expression /
• biological function /
• review

Abstract: The ATP-binding cassette（ABC） transporter family is a large protein family, including complete and half transporter proteins，with a variety of functions. The core unit of the complete ABC transporter protein contains two nucleotide-binding domains（NBDs） and two transmembrane domain（TMD） regions，while the half transporter consists of only one MSD and one NBD. The plant ABC transporter is not only relevant to transportation of hormones，lipids，metal ions, secondary metabolites, and exogenous substance in plants，but it is also beneficial to many important physiological processes, such as plant and pathogen interactions and ion channel regulation in plants. Thus, it is an important plant membrane transport protein family. The plant ABC transporter is divided into eight subfamilies（A-H）. Genome sequencing in pattern plants has enhanced the discovery and study of ABC transporter genes. In recent years various subfamily genes have been cloned from different plants followed by their expression and functional analysis. Recent studies have concentrated mainly on members of the ABCB，ABCC，and ABCG subfamilies，but the structure and function of every subfamily varies widely with their expressions differing in manifold ways. This paper summarizes recent advances in the ABC transporter family；systematically elaborates the structure，expression，and biological function of plant ABC transporter genes；and proposes further research.［Ch，1 tab. 49 ref.］