Effect of Secondary Metabolites of Plant Entophyte on Physiological Mechanism in Pepper Seedlings Under Drought Stress

Taking secondary metabolites of plant entophyte as material,and pepper seedling as research object,PEG-6000 was used to simulate the drought stress environment,the effect of secondary metabolites of plant entophyte on plant height,leaf length,stem diameter,fresh weight,dry weight,the number of fibrous roots,leaf relative water content,relative membrane permeability,and content of proline of pepper seedling were investigated,the effect of secondary metabolites of plant entophyte on physiological mechanism in pepper seedlings under drought stress were studied.The results showed that,the plant height,leaf length,stem diameter,the number of fibrous roots,fresh weight,dry weight,leaf relative water content,and content of proline of the group treated by secondary metabolites were increased by 30.91%,14.76%,129.57%,33.33%,33.37%,43.79%,8.71%and 14.90%respectively compared to control(CK).The relative membrane permeability was decreased by 14.63%compared to CK.These results suggested the secondary metabolites of plant entophyte could enhance drought resistance ability of pepper seedlings through adjusting drought adaptability including morphology and physiological characteristics.