The biomass,leaf SP content,MDA content,SOD activity,and POD activity of plants at different stages were measured to analyze their physiological responses to flooding stress and exogenous 6-BA by simulat-ing flooding with exogenous 6-BA treatment in pots using annual Salix matsudana × alba cuttings as the material.The findings indicated that the SP content of leaves under flooding stress showed a decreasing trend and reduced photosynthetic product accumulation,the antioxidant enzyme activity increased and then decreased,and the MDA content increased significantly at 45 d.Exogenous 6-BA had a significant effect on photosynthetic product accu-mulation and protective enzyme system of plants under stress.The study showed that the annual Salix hybrid showed strong tolerance to flooding,and the spraying of 6-BA at a concentration of 30 mg/L in the first and middle stages had a significant effect on improving photosynthetic product accumulation and enhancing the leaf protective enzyme system.
Salix matsudana x albawaterlogging stress6-BAprotective enzyme systemredundancy ana-lysis
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