Abstract: This paper reviews the adaptive changes of main anatomical structures of root system including cortical tissue, casparian strip and vascular cylinder under stress conditions, and reveals the responses of the roots to different stress conditions by selfadjustment and even alternation of structure. It is suggested that future research should be conducted to investigate the plasticity of root anatomical structure under different stress conditions. In addition, index systems of screening stressresistant varieties should be established by combining morphological, anatomical and physiological metabolic parameters of plants.

Key words: leaf N and P stoichiometry, rocky desertification, plant functional group