Effects of alginic acid on radish growth and osmotic adjustment substance content under cadmium stress

Abstract

To study the effects of alginic acid on the growth of vegetables, a pot experiment was conducted to study the effects of spraying alginic acid at different dilution folds on the growth and osmotic adjustment substance content of radish under cadmium stress condition. The results showed that the biomass, leaf length and leaf width of radish with 600, 900, 1200 and 1500 dilution folds alginic acid were higher than those of the control, while the soluble protein content, relative conductivity and malondialdehyde content of the radish were lower than those of the control. When the dilution factor of alginic acid is 600 dilution folds, the biomass, leaf length and leaf width of radish's roots, root tubers, leaves and edible parts all reach the maximum. Increased by 19.39%, 35.27%, 19.74%, 29.44%, 22.11% and 14.01% compared with the control, respectively; the soluble protein content, relative conductivity and MDA content of radish reached the lowest, which were 38.76%, 29.86% and 35.61% lower than the control, respectively. Sprayed diluted alginic acid can promote the growth of radish, and the best dilution factor is 600 dilution folds.