The elongation of Arabidopsis hypocotyls is regulated by many factors such as light, phytohormones, transcription factors and the
cytoskeleton. Microtubule is a member of cytoskeleton which plays an important role in hypocotyls elongation. The organization and dynamics
of microtubules are regulated by microtubule associated proteins (MAPs). Recent years, several MAPs involve in the regulation of hypocotyls
elongation mediated by upstream signals are identified. This review summarizes the recent progress and classifies the MAPs participate in the
regulation of hypocotyls elongation into two categories, the positive and negative regulators.