|
| Effects of plant growth-promoting rhizobacteria on the copper enrichment ability of Sinosenecio oldhamianus and physicochemical properties of soil |
| Received:September 18, 2019 |
| View Full Text View/Add Comment Download reader |
| KeyWord:combined remediation;copper-contaminated soil;Sinosenecio oldhamianus;plant growth-promoting rhizobacteria |
| Author Name | Affiliation | E-mail | | SHEN Tian | College of Resources, Sichuan Agricultural University, Chengdu 611130, China | | | WANG Qiong-yao | Natural Resources Research Institute of Sichuan Province, Chengdu 610041, China | | | CUI Yong-liang | Natural Resources Research Institute of Sichuan Province, Chengdu 610041, China | | | YAN Min | College of Resources, Sichuan Agricultural University, Chengdu 611130, China | | | LI Yu-xin | College of Resources, Sichuan Agricultural University, Chengdu 611130, China | | | TU Wei-guo | Natural Resources Research Institute of Sichuan Province, Chengdu 610041, China | | | ZHANG Fang | College of Resources, Sichuan Agricultural University, Chengdu 611130, China | | | WANG Juan | College of Resources, Sichuan Agricultural University, Chengdu 611130, China | | | YU Xiu-mei | College of Resources, Sichuan Agricultural University, Chengdu 611130, China | yuxiumeicool@163.com |
|
| Hits: 2848 |
| Download times: 2751 |
| Abstract: |
| The aim of this study is to evaluate the effect of plant growth-promoting rhizobacteria(PGPR)on the absorption of Cu from soil by Sinosenecio oldhamianus. Specifically, the growth, nutrition, and Cu content of Sinosenecio oldhamianus grown in soils with different Cu contents and the changes in the soil physicochemical properties were determined after adding a PGPR mixture in a pot experiment. The results showed that the growth of Sinosenecio oldhamianus slowed with the increase in the soil Cu concentration, thereby indicating that the high concentration of Cu significantly inhibited the growth of Sinosenecio oldhamianus. The Cu was mainly enriched in the roots of Sinosenecio oldhamianus, and only approximately 18% of Cu was transferred to the aboveground part. The inoculation of the PGPR mixture increased the plant height, root length, contents of N, P, and K, and amount of Cu enriched in the roots of Sinosenecio oldhamianus in soils contaminated with different concentrations of Cu. In particular, when the soil Cu concentration was 600 mg·kg-1, PGPR increased the height and root length of Sinosenecio oldhamianus by 10.03 cm and 7.10 cm, respectively. The Cu content in the Sinosenecio oldhamianus roots increased by 14.01% in soil contaminated with 800 mg·kg-1 of Cu. PGPR also increased the soil urease, protease, invertase, and phosphatase activities by 80.28%, 217.11%, 43.26%, and 61.89%, respectively. The results suggest that multi-function PGPR can improve the Cu resistance and Cu enrichment ability of Sinosenecio oldhamianus in Cu-contaminated soil and improve soil quality. Thus, PGPR can be considered as a means to promote the remediation of Cu-contaminated soil using Sinosenecio oldhamianus. |
|
|
|
