Arsenic accumulation by aquatic macrophyte coontail (Ceratophyllum demersum L.) exposed to arsenite, and the effect of iron on the uptake of arsenite and arsenate

Content Provider	Semantic Scholar
Author	Khang, Huynh Vinh Hatayama, Masayoshi Inoue, Chihiro
Copyright Year	2012
Abstract	In this study, the aquatic macrophyte Ceratophyllum demersum L. (coontail or hornwort) was tested for its efficiency of arsenic (As) uptake under laboratory conditions. Our results revealed that the solution pH had a significant effect on As accumulation by C. demersum (p < 0.001). The accumulation was highest at pH 5 and decreased as pH values increased. Plants that were exposed to various concentrations of arsenite (As(III)) for 24 and 48 h, exhibited tolerance and toxic responses, respectively. As accumulation by C. demersum depended on the concentrations of As(III) and the duration of exposure (p < 0.001). At 40 μM after 24 h, plants accumulated 227.5 μg As g−1 dw and showed no visible symptoms of toxicity. However, after 48 h, As level reached 302.4 μg g−1 dw and biomass production decreased significantly. Toxic effects were evident by plant necrosis and negative biomass production, leading to a decrease in the amount of accumulated As. Also, the addition of iron (Fe) into the nutrient solutions (0.18 mM) had contrasting effects on the uptake of 2 As species – the uptake of As(III) was enhanced by the presence of Fe, but the uptake of arsenate (As(V)) was considerably inhibited.
Starting Page	47
Ending Page	52
Page Count	6
File Format	PDF HTM / HTML
DOI	10.1016/j.envexpbot.2012.04.008
Volume Number	83
Alternate Webpage(s)	https://msuecoeng.files.wordpress.com/2015/06/eeb2547.pdf
Alternate Webpage(s)	https://doi.org/10.1016/j.envexpbot.2012.04.008
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article