5-Aminolevulinic acid could enhance the salinity tolerance by alleviating oxidative damages in Salvia miltiorrhiza

S. miltiorrhiza is a Chinese medicinal plant that widely cultivated. The root growth in are inhibited by soil salinity. Here we investigated the capability of regulator, 5-ALA to promote under different salt stresses. Five-month old roots were uniformly irrigated with levels solution i.e. 0, 100, 200 mM NaCl. After 3 days treatment, salt-treated plants sprayed concentrations ALA (0, 10 mg L-1, 20 L-1) on leaves and cultured for another 7 days. Results revealed treated produced significantly higher biomass sustaining leaf chlorophyll content stressed. L-1 up-regulated antioxidant enzymes activities studied salinity treatments. Positive effects defense systems also supported significant increase expression SOD isoenzymes genes (CSD1, FSD1 MSD2), response (DXS1, C4H, GGPPS) stress-related gene (MYB36 , MYB39) plants. This study suggested can protect from induced oxidative stress injury promoting system, boosting secondary metabolic pathways protecting photosynthetic pigments.