Abstract: Rich in various nutrients and active substances,algae have important economic value and application prospects. Nowadays,open runway pool is often used in algal cultivation,the cost of which is low,but easily affected by environmental conditions. Inappropriate environmental conditions（temperature,acidity,heavy metal,UV,salinity and light stress,etc.）could cause the increase of production cost and the decrease of production output and quality,thus this would severely hinder the development of algal farming and related industries. Additives can not only effectively promote the growth of algae and also alleviate the damage of adverse environmental conditions. In this paper,the application of additives in algae growth and stress resistance in recent years is summarized and the related mechanisms of various additives are sorted and clarified. The results showed that the application of additives in algae was mostly limited to the measurement of growth and physiological indexes,such as the cell density,the photosystem activity,the content of osmotic regulation substance and lipid content,the activity of catalase and nitrate reductase,etc. Only a few studies have extended the expressions of defense genes by molecular technology,trying to further explore the molecular mechanism of algae stress resistance. This paper is expected to provide theoretical basis for researchers to further clarify the signal transduction mechanism of common additives in algae and improve the yield and quality of algal products caused by abiotic stress,which is of great practical significance.

Key words: algae, additives, mechanisms, growth, resistance