Boron is an essential nutrient element for plant and plays an important role in many physiological processes of higher plants.Root is an important organ for absorbing the water and nutrients,and affects the growth and development of plants.This review is focused on recent researches about the regulation and physiological metabolism of roots under boron deficiency,the regulatory mechanism of root growth and nutrition absorption under low boron condition.In addition,this paper summarized effects of boron on stability of root cell walls,growth and development and nitrogen fixing capacity of root nodule of leguminous plants.Finally,problems and prospects of researches about the effects of boron on plant roots were proposed.