Cloning and Function Characteristic of GhDWF 4,an Ortholog of Arabidopsis DWF 4 from Upland Cotton (Gossypium hirsutum L.)

As one of the longest cells characterized in plant kingdom,cotton fibers were regarded as an ideal material for studying plant cell growth and development.In recent years,several reports revealed that brassinosteroids (BRs) play an important role in the growth and development of cotton fiber.To further investigate the effect of BRs on fiber cell development and illuminate the mechanism of BRs action,we cloned GhDWF4,an ortholog of Arabidopsis DWF4 from upland cotton (Gossypium hirsuturn L.).