Variations in phytoremediation potential and phytoavailability of heavy metals in different Salix genotypes subjected to seasonal flooding
文献类型： 外文期刊
作者： Yang, Weidong 1 ; Liu, Di 2 ; Wang, Yuyan 2 ; Hussain, Bilal 1 ; Zhao, Fengliang 3 ; Ding, Zheli 4 ; Yang, Xiaoe 1 ; Zhu, 1 ;
作者机构： 1.Zhejiang Univ, Coll Environm & Resource Sci, Key Lab Environm Remediat & Ecol Hlth, Minist Educ, Hangzhou 310058, Peoples R China
2.Jiujiang Univ, Jiangxi Yangtze River Econ Zone Res Inst, Jiujiang 332005, Peoples R China
3.Chinese Acad Trop Agr Sci CATAS, Inst Environm & Plant Protect, Haikou 571101, Hainan, Peoples R China
4.Chinese Acad Trop Agr Sci CATAS, Haikou Expt Stn, Haikou, Hainan, Peoples R China
5.Hainan Univ, Coll Trop Crops, 58 Renmin Rd, Haikou 570228, Hainan, Peoples R China
6.Bahauddin Zakariya Univ, Dept Environm Sci, Multan, Pakistan
关键词： Salix genotypes; Heavy metals; Flooding; Metal phytoavailability; Phytomanagement
期刊名称：JOURNAL OF ENVIRONMENTAL MANAGEMENT （ 影响因子：6.789； 五年影响因子：6.914 ）
ISSN： 0301-4797
年卷期： 2021 年 299 卷
页码：
收录情况： SCI
摘要： Climate-related flooding poses a potential challenge to phytoremediation of metal polluted areas. In the present study, uptake, translocation and accumulation of heavy metals (Cd, Zn and Cu), and their phytoavailability in six flood-tolerant Salix genotypes were investigated under simulated seasonal flooding conditions (non-flooding conditions were kept as the control). Plants were cultivated in a greenhouse with open windows using the soil polluted with Cd, Zn and Cu for 110 days. All the control (non-flooded) genotypes did not exhibit visible toxic symptoms, whereas the flooded genotypes showed leaf chlorosis and developed both lenticels and adventitious roots. Biomass production and metal accumulation in tissues varied with Salix genotypes. The flooded genotypes dramatically decreased aerial biomass production compared with corresponding non-flooded genotypes. All the control Salix genotypes showed relatively high accumulation for Cd, Zn and Cu in aerial parts due to high EDTAextractable metals in the rhizosphere, exhibiting phytoextraction features. In contrast, the flooded genotypes drastically decreased uptake, translocation, accumulation, and extraction capacities for Cd, Zn and Cu in aerial parts, differing with genotypes, and tended to phyto-stabilize them in roots, especially Cu. This study indicated that flooding is a leading factor on phytoremediation efficiency for contaminated sites with willows.
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