Plant roots exude a wide variety of metabolites including carbohydrates, proteins, vitamins, amino acids, and other organic
compounds . Some compounds in root exudates may act as allelochemicals to participate in rhizosphere interactions between
plants and other organisms .
This study showed that therewas a correlation with allelochemical 5,7,40-trihydroxy-30,50-dimethoxyflavone
exuded from alleloparhic rice roots and enzyme activities in rice soil