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| Effects of different exogenous substances on the growth，physiology，and Cd accumulation in Aster subulatus Michx. grown under Cd contamination |
| Received:April 08, 2024 |
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| KeyWord:Cd accumulation;A. subulatus;phytoremediation;exogenous substances |
| Author Name | Affiliation | E-mail | | LIANG Xuelian | Agro-Products Quality Safety and Testing Technology Research Institute, Guangxi Academy of Agricultural Sciences, Nanning 530007, China | | | CHEN Wei | Agro-Products Quality Safety and Testing Technology Research Institute, Guangxi Academy of Agricultural Sciences, Nanning 530007, China | | | WANG Tianshun | Agro-Products Quality Safety and Testing Technology Research Institute, Guangxi Academy of Agricultural Sciences, Nanning 530007, China | | | XING Yihao | Genebank of Guangxi Academy of Agricultural Sciences, Nanning 530007, China | | | LU Weifan | Agro-Products Quality Safety and Testing Technology Research Institute, Guangxi Academy of Agricultural Sciences, Nanning 530007, China | | | LIAO Jie | Agro-Products Quality Safety and Testing Technology Research Institute, Guangxi Academy of Agricultural Sciences, Nanning 530007, China | | | TANG Li | Agro-Products Quality Safety and Testing Technology Research Institute, Guangxi Academy of Agricultural Sciences, Nanning 530007, China | | | WANG Haijun | Agro-Products Quality Safety and Testing Technology Research Institute, Guangxi Academy of Agricultural Sciences, Nanning 530007, China | | | JIANG Wenyan | Agro-Products Quality Safety and Testing Technology Research Institute, Guangxi Academy of Agricultural Sciences, Nanning 530007, China | duanmuzheng2010@163.com |
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| Abstract: |
| In order to improve the phytoremediation efficiency of the Aster subulatus Michx.（A. subulatus）, a Cd-hyperaccumulator, the effects of four exogenous substances on the growth, Cd accumulation and antioxidant system of A. subulatus was studied. In this study, the effects of biomass, Cd content, Cd accumulation, and the antioxidant system were analyzed in the application of glucosidine diphosphate （UDPG）and methyl jasmonate（MeJA）, spermidine（SPD）, and abscisic acid（ABA）on A. subulatus under sand culture condition with 30 mg·L-1 Cd. Compared with Cd treatment alone, application of ABA and UDPG significantly increased biomass and aboveground Cd accumulation. After application of 0.1 mg·L-1 ABA, aboveground dry weight and Cd accumulation increased by 107.1% and 152.2%, respectively; after application of 0.1 mg·L-1 UDPG, aboveground dry weight and Cd accumulation increased by 72.3% and 87.4%, respectively. Treatment of SPD increased the aboveground Cd content and the high concentration treatment alleviated the adverse effects of Cd on the growth of A. subulatus. MeJA treatment significantly inhibited the accumulation of Cd in A. subulatus. Treatment with 0.4 mg·L-1 MeJA and 5 mg·L-1 SPD significantly reduced the MDA content of A. subulatus leaves by 21.6% and 25.0%, respectively. Treatment with UDPG and 0.1 mg·L-1 ABA significantly increased the content of GSH and the activities of SOD and APX. In conclusion, exogenous application of appropriate concentrations of ABA and UDPG effectively alleviated the growth inhibition of Cd on A. subulatus, increased plant biomass and Cd accumulation, and improved the tolerance of A. subulatus to Cd. |
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