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| Effects of Different Growth Regulators on Cadmium Accumulation by Sedum alfredii H. |
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| KeyWord:Sedum alfredii H; cadmium accumulation; plant growth regulators; phytoremediation |
| Author Name | Affiliation | | HE Bing | College of Agriculture, Guangxi University, Nanning 530004, China | | LU Qin-yu | College of Agriculture, Guangxi University, Nanning 530004, China | | LI Yan-yan | College of Agriculture, Guangxi University, Nanning 530004, China | | CHEN Xiao-qin | College of Agriculture, Guangxi University, Nanning 530004, China | | WANG Xue-li | College of Agriculture, Guangxi University, Nanning 530004, China | | GU Ming-hua | College of Agriculture, Guangxi University, Nanning 530004, China |
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| Abstract: |
| Enhancing heavy metal accumulation in hyperaccumulator has been a hot topic. In the present study, the impact of plant growth regulators（PGRs） on growth and Cd accumulation of Sedum alfredii H., a Cd hyperaccumulator, was investigated under hydroponic condition with 0.10 mmol·L-1 Cd. Four kinds of PGRs were sprayed on leaves. Application of abscisic acid（ABA） increased shoot biomass and Cd concentration, thus enhancing Cd accumulation in shoots. Supplying indole-3-acetic acid（IAA） increased shoot biomass and improved leaf Cd detoxiation, thus promoting shoot Cd accumulation. Similarly, the treatment of 6-benzylaminopurine（6-BA） also enhanced shoot Cd accumulation due to improved shoot biomass and leaf detoxification. However, addition of ethylene（ETH） decreased shoot Cd accumulation as a result of suppression of both shoot growth and Cd upward transport. The results of present study indicate that proper applications of ABA, IAA, and 6-BA could improve Cd phytoextraction efficiency of heavy metal hyperaccumulators. |
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