Abstract: This paper summarized the research progress on the action mechanisms of allelopathy in inhibiting algae, i.e., affecting the photosynthesis of algal cell, destroying algal cell membrane, changing the antioxidant enzyme activities in algal cells, and affecting algal cell ultrastructure and gene expression, etc. Mainly through reducing chlorophyll a content, destroying photosystem II and cell ultrastructure, making cell membrane structure lysis and gene expression abnormal, changing enzyme activities, and damaging antioxidant system, allelochemicals can reduce the number of algal cells and inhibit the growth of algae. The prospective research issues in this field were also proposed, with the focus on gene expression and molecular and genetic mechanisms, aimed to provide theoretical bases for developing safe and efficient allelochemicals in algal inhibition.

Key words: Sogatella furcifera, Rice varieties, Tolerance, Nutrient component in rice plants