期刊
CHEMOSPHERE
卷 181, 期 -, 页码 382-389出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2017.04.095
关键词
Decapitation; Apical dominance; Phytoextraction; Cadmium; Celosia argentea Linn
资金
- Natural Science Foundation of China [41471270]
- National Key Research and Development Program of China [2016YFD0800804]
- Natural Science Foundation of Guangxi [2014GXNSFGA118009, 2013GXNSFEA053002]
The effect of decapitation on enhancing plant growth and Cd accumulation in Celosia argentea Linn. was evaluated using a pot experiment. Decapitation significantly enhanced the growth of C argentea. The numbers of branch and leaf in the decapitated plants (DP) were significantly higher than those in undecapitated plants (UDP, p < 0.05). Decapitation increased the biomass by 75%-105% for roots, 108% -152% for stems, and 80%-107% for leaves. Although the transpiration and photosynthesis rates were not significantly different between DP and UPD, decapitation significantly increased the total leaf area and total transpiration per plant (p < 0.05). The higher total transpiration per plant resulted in a higher leaf Cd concentration in DP. DP accumulated Cd in shoots (197, 275, and 425 mu g plant(-1)) that were 2.5-2.8 times higher than UDP (78, 108, and 152 mu g plant(-1)), with the soils containing 1, 5, and 10 mg kg(-1) Cd. Results suggested that decapitation is a novel and convenient method to improve the phytoextraction efficiency of C argentea in Cd contaminated soils. (C) 2017 Elsevier Ltd. All rights reserved.
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