|
| Effect of exopolysaccharide from Enterococcus faecium on rice seed germination and seedling growth under cadmium stress |
| Received:February 22, 2020 |
| View Full Text View/Add Comment Download reader |
| KeyWord:exopolysaccharides;cadmium stress; |
| Author Name | Affiliation | E-mail | | LUO Sheng | Institute of Applied Microbiology, Jiangxi Agricultural University, Nanchang 330045, China
College of Bioscience and Bioengineering, Jiangxi Agricultural University, Nanchang 330045, China | | | ZHAO Ze-wen | Institute of Applied Microbiology, Jiangxi Agricultural University, Nanchang 330045, China
College of Bioscience and Bioengineering, Jiangxi Agricultural University, Nanchang 330045, China | | | REN Xin-yu | Institute of Applied Microbiology, Jiangxi Agricultural University, Nanchang 330045, China
College of Bioscience and Bioengineering, Jiangxi Agricultural University, Nanchang 330045, China | | | WEI Hong-yu | Institute of Applied Microbiology, Jiangxi Agricultural University, Nanchang 330045, China
College of Bioscience and Bioengineering, Jiangxi Agricultural University, Nanchang 330045, China | | | MA YA-jing | College of Bioscience and Bioengineering, Jiangxi Agricultural University, Nanchang 330045, China | | | PAN Qi-tao | College of Bioscience and Bioengineering, Jiangxi Agricultural University, Nanchang 330045, China | | | LI Rong-tong | College of Chemical Life and Materials, East China University of Technology, Nanchang 330013, China | | | GONG Guo-sheng | Jiangxi Wuyuan Kenong Industry Co., Ltd, Lichuan 344600, China | | | CHENG Xin | Institute of Applied Microbiology, Jiangxi Agricultural University, Nanchang 330045, China
College of Bioscience and Bioengineering, Jiangxi Agricultural University, Nanchang 330045, China | xincheng@jxau.edu.cn |
|
| Hits: 2154 |
| Download times: 1583 |
| Abstract: |
| The effect of Enterococcus faecium exopolysaccharide(EPS)on rice seed germination and seedling growth under Cd stress was investigated. Different concentrations of EPS(500 mg·L-1 and 1 000 mg·L-1)were added to the culture medium that contained Cd(20 mg·L-1 and 40 mg·L-1)to investigate the metabolic changes of rice seed germination and seedling growth. The results showed that Cd stress significantly inhibited the germination efficiency of rice seeds and decreased the development of various organs of the seedlings, whereas the addition of different concentrations of EPS(500 mg·L-1 and 1 000 mg·L-1) significantly improved the germination potential, germination rate, and root development of rice seeds under Cd stress; however, the germination of rice buds was significantly inhibited after germination. This inhibition was not observed during the growth stage of the rice seedlings. Under Cd stress, the content of flavonoids and anthocyanins in the rice seedlings treated with EPS increased 18.6%~208.7% and the activity of superoxide dismutase and peroxidase also increased, whereas the malondialdehyde content decreased significantly. Results from the fourier transform infrared test showed that the contents of carbohydrates, proteins, lipids, and carboxylates in rice leaves were increased with the addition of EPS under Cd stress, which might decrease the toxic effect of Cd in rice by enhancing the osmotic effect in leaves. The results of this study indicate that the EPS of E. faecium can significantly mitigate the toxic effects of Cd stress on rice seed sprouting and seedling growth. |
|
|
|
