%0 Journal Article %A N. Kotabin and Y. Tahara and K. Issakul and O. Chunhachart %D 2015 %J International Journal of Bioengineering and Life Sciences %B World Academy of Science, Engineering and Technology %I Open Science Index 105, 2015 %T Potential of γ-Polyglutamic Acid for Cadmium Toxicity Alleviation in Rice %U https://publications.waset.org/pdf/10002305 %V 105 %X Cadmium (II) (Cd) is one of the major toxic elemental pollutants, which is hazardous for humans, animals and plants. γ- Polyglutamic acid (γ-PGA) is an extracellular biopolymer produced by several species of Bacillus which has been reported to be an effective biosorbent for metal ions. The effect of γ-PGA on growth of rice grown under laboratory conditions was investigated. Rice seeds were germinated and then grown at 30±1°C on filter paper soaked with Cd solution and γ-PGA for 7 days. The result showed that Cd significantly inhibited the growth of roots, shoots by reducing root, and shoot lengths. Fresh and dry weights also decreased compared with control; however, the addition of 500 mg·L-1 γ-PGA alleviated rice seedlings from the adverse effects of Cd. The analysis of physiological traits revealed that Cd caused a decrease in the total chlorophyll and soluble protein contents and amylase activities in all treatments. The Cd content in seedling tissues increased for the Cd 250 μM treatment (P %P 994 - 998