Toxic Effects of 2,2′,4,4′-Tetrabromodiphenyl Ether on Chinese Cabbage

Meng, Yuting; Liu, Boling; Ping, Zhang; Cui, Ping; Song, Yuhan; Qiu, Nianwei; Han, Guoliang; Zhou, Feng

doi:10.21273/hortsci13463-18

Cited by 6 publications

(2 citation statements)

References 27 publications

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“…The toxicity mechanism of PBDEs was found to be through directly damaging the membranes and interfering with the electron transfer in photosynthesis and respiration, which led to electron leakage and the production of reactive oxygen species (ROS) (Pereira et al 2013, Meng et al 2018a. Under pollution stresses, chloroplasts are the major organelles in plant cells that produce ROS.…”

Section: Introductionmentioning

confidence: 99%

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The toxicity of BDE-47 to the photosystem of Lemna minor fronds

Qiu¹,

Zhang²,

Yan³

et al. 2020

Biologia plant.

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To elucidate the toxicity of 2,2ʹ,4,4ʹ-tetrabromodiphenyl ether (BDE-47) on photosynthetic primary processes, in vivo and in vitro treatments of BDE-47 were performed. The 20-d treatment in vivo (5 -20 μg dm -3 ) suppressed the reproduction of duckweed (Lemna minor) and led to decline in chlorophyll (Chl) content of fronds. The most obvious features of BDE-47-treated fronds included a Chl a fluorescence rise at the J phase and a depression at the G phase, whereas significant fluorescence rises at the L, K, and J phases were found on the ΔVt curve of thylakoid membranes treated with 10 -15 mg dm -3 BDE-47 for 4 h (in vitro). In both in vivo and in vitro experiments, the BDE-47 treatments significantly reduced the density of the active reaction centers (RC/CSo), affected the efficiency and speed of photosynthetic electron transfer [the maximum quantum yield of photosystem (PS) II photochemistry -Fv/Fm, quantum yield for electron transport (at t = 0) -φEo, electron transport flux per excited cross section -ETo/CSo, and net rate of reaction centers closure at 300 and 100 μs -dV/ dto and dVG/dto, respectively], and increased energy dissipation [quantum yield for energy dissipation (at t = 0) -φDo, dissipated energy flux per reaction center -DIo/RC, and issipated energy flux per excited cross section -DIo/ CSo]. The BDE-47 at 5 -15 mg dm -3 had no impact on the minimum (initial) fluorescence (Fo) and total electron carriers per reaction center (Sm) of the thylakoid membranes, but PS II units were less tightly grouped (a positive L-band). On the contrary, there was no positive L-band on the difference between relative fluorescence intensities of the normalized induction curves from 50 μs to 300 μs (WK) of each BDE-47 treatment and control (ΔWK), and Fo and Sm increased after the treatment with BDE-47. The above results indicate that BDE-47 not only affected the permeability of thylakoid membranes, but also relaxed the structure of PS II, thereby affecting the function of PS II. In addition, BDE-47 could induce secondary damage to the PSs in duckweed fronds.

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Section: Introductionmentioning

confidence: 99%

“…The toxicity of PBDEs to photosystem was first reported in microalgae. It was later discovered that PBDEs are also toxic to the photosystem of higher plants (Meng et al 2018a). The above studies were performed to investigate the long-term and simple effect of PBDE on photosystems.…”

Section: Introductionmentioning

confidence: 99%