Abstract: act：Changes of activities of protective enzymes superoxide dismutase(SOD)，catalase (0 )，peroxidase(PoD)] and MDA contents in leaf and root of asparagus bean [ Vigna unquiculata W． ssp． (L．) Verd．cultivars differing in sensitivity to phosphorus-deficiency under phosphorus-deficiency
stress were studied． Under P deficiency stress, activities of protective enzymes in ‘Luhua bai’ increased or increased more，however that in ‘Erlu bai ’ decreased or increased less． Under P．deficiency P-activities of
SOD and POD in asparagus bean seedling root increased， enhanced llgnification of root and vessel diferentiation, then enhanced root capability of translocation and absorption of water and nutrient， that of ‘hlhu8 bai’increased iilore．

Key words: Asparagus bean, Phosphorus, Lipid pemxidation, Protective enzymes