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Toxicity of linear alkylbenzene sulfonate to aquatic plant Potamogeton perfoliatus L
Ist Teil von
Environmental science and pollution research international, 2018-11, Vol.25 (32), p.32303-32311
Ort / Verlag
Berlin/Heidelberg: Springer Berlin Heidelberg
Erscheinungsjahr
2018
Quelle
MEDLINE
Beschreibungen/Notizen
Aquatic plants play an important role in maintaining the health of water environment in nature. Studies have shown that linear alkylbenzene sulfonate (LAS), a type of omnipresent pollutant, can cause toxic damage to aquatic plants. In the present research, we studied the physiological and growth response of submerged plant
Potamogeton perfoliatus
L. to different concentrations of LAS (0.1, 1.0, 10.0, 20.0, and 50.0 mg l
−1
). The results showed that LAS is toxic to
P. perfoliatus
, and the toxicity is dose-dependent. Only slightly reversible oxidative damages were observed in the physiological parameters of
P. perfoliatus
when
P. perfoliatus
was exposed to lower LAS doses (< 10 mg l
−1
): soluble sugar, soluble protein, H
2
O
2
, and malondialdehyde (MDA) content in
P. perfoliatus
increased significantly at 0.1 mg l
−1
and then returned to normal levels at 1.0 mg l
−1
. Antioxidant enzymes were activated before the LAS concentration reached 10 mg l
−1
, and the activities of superoxide dismutase (SOD), catalase (CAT), and photosynthesis pigment content declined significantly when the concentration of LAS exceeded 10 mg l
−1
. In addition, at higher concentrations (20–50 mg l
−1
) of LAS, dry weight and fresh weight of
P. perfoliatus
showed significant declines. The results indicate that LAS above 10 mg l
−1
can cause serious physiological and growth damage to
P. perfoliatus
.