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Evaluation of the acute toxic response induced by triazophos to the non-target green algae Chlorella pyrenoidosa.
Pestic Biochem Physiol. 2022 Mar; 182:105036.PB

Abstract

Residues of triazophos in aquatic ecosystems due to extensive use for controlling pests in agriculture has became worldwide concern, while the toxic response of triazophos on the non-target green algae in aquatic environment is not well studied. Therefore, the acute (96 h) toxic effects of 1 and 10 mg/L triazophos on green algae Chlorella pyrenoidosa were evaluated in present study. The results showed that the growth was notably inhibited when treated with triazophos and the 96 h-EC50 (median inhibition concentration) were 12.79 mg/L. The content of photosynthetic pigments (including chl a, chl b, total-chl and carotinoids) clearly decreased under two treatments after 48 h and 96 h with exception for the values at 48 h exposure in 1 mg/L treatment. In addition, the transcript abundance of photosynthesis-related genes (psbA, psbC and rbcL) showed obvious decrease in above two treatments after exposure 96 h to triazophos. In response to 10 mg/L triazophos treatment, the morphology of thylakoid chloroplast of algal cells were obviously damaged. It was also found that starch granules increased with down-regulation of atpB gene expression in 10 mg/L treatment, which suggests that triazophos may inhibit the energy metabolism of C. pyrenoidosa. Moreover, the algal growth inhibition was along with the increase of intracellular reactive oxygen species (ROS), activity of antioxidant enzymes and malondialdehyde content indicating oxidative damage and lipid peroxidation in the algal cells. Our findings reveal that triazophos has potential toxicity and environmental risks to one of the primary producers green algae.

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Authors+Show Affiliations

Su Q
College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi 712100, China.
Zheng J
Shaanxi Environmental Investigation and Assessment Center, Xi'an, Shaanxi 710054, China.
Xi J
College of Grassland Agriculture, Northwest A&F University, Yangling, Shaanxi 712100, China.
Yang J
Chinese Sturgeon Research Institute, China Three Gorges Corporation, Yichang, Hubei 443100, China.
Wang L
College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi 712100, China. Electronic address: fisherwanglx@nwsuaf.edu.cn.
Xiong D
College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi 712100, China. Electronic address: xiongdongmei@nwsuaf.edu.cn.

MeSH

ChlorellaEcosystemOrganothiophosphatesTriazolesWater Pollutants, Chemical

Pub Type(s)

Journal Article

Language

eng

PubMed ID

35249646

Citation

Su, Qi, et al. "Evaluation of the Acute Toxic Response Induced By Triazophos to the Non-target Green Algae Chlorella Pyrenoidosa." Pesticide Biochemistry and Physiology, vol. 182, 2022, p. 105036.
Su Q, Zheng J, Xi J, et al. Evaluation of the acute toxic response induced by triazophos to the non-target green algae Chlorella pyrenoidosa. Pestic Biochem Physiol. 2022;182:105036.
Su, Q., Zheng, J., Xi, J., Yang, J., Wang, L., & Xiong, D. (2022). Evaluation of the acute toxic response induced by triazophos to the non-target green algae Chlorella pyrenoidosa. Pesticide Biochemistry and Physiology, 182, 105036. https://doi.org/10.1016/j.pestbp.2022.105036
Su Q, et al. Evaluation of the Acute Toxic Response Induced By Triazophos to the Non-target Green Algae Chlorella Pyrenoidosa. Pestic Biochem Physiol. 2022;182:105036. PubMed PMID: 35249646.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Evaluation of the acute toxic response induced by triazophos to the non-target green algae Chlorella pyrenoidosa. AU - Su,Qi, AU - Zheng,Juan, AU - Xi,Jiejun, AU - Yang,Jing, AU - Wang,Lixin, AU - Xiong,Dongmei, Y1 - 2022/01/10/ PY - 2021/08/21/received PY - 2021/12/22/revised PY - 2022/01/03/accepted PY - 2022/3/7/entrez PY - 2022/3/8/pubmed PY - 2022/3/9/medline KW - Acute toxicity KW - Chlorella pyrenoidosa KW - Oxidative damage KW - Photpsynthesis KW - Triazophos KW - Ultrastructural morphology SP - 105036 EP - 105036 JF - Pesticide biochemistry and physiology JO - Pestic Biochem Physiol VL - 182 N2 - Residues of triazophos in aquatic ecosystems due to extensive use for controlling pests in agriculture has became worldwide concern, while the toxic response of triazophos on the non-target green algae in aquatic environment is not well studied. Therefore, the acute (96 h) toxic effects of 1 and 10 mg/L triazophos on green algae Chlorella pyrenoidosa were evaluated in present study. The results showed that the growth was notably inhibited when treated with triazophos and the 96 h-EC50 (median inhibition concentration) were 12.79 mg/L. The content of photosynthetic pigments (including chl a, chl b, total-chl and carotinoids) clearly decreased under two treatments after 48 h and 96 h with exception for the values at 48 h exposure in 1 mg/L treatment. In addition, the transcript abundance of photosynthesis-related genes (psbA, psbC and rbcL) showed obvious decrease in above two treatments after exposure 96 h to triazophos. In response to 10 mg/L triazophos treatment, the morphology of thylakoid chloroplast of algal cells were obviously damaged. It was also found that starch granules increased with down-regulation of atpB gene expression in 10 mg/L treatment, which suggests that triazophos may inhibit the energy metabolism of C. pyrenoidosa. Moreover, the algal growth inhibition was along with the increase of intracellular reactive oxygen species (ROS), activity of antioxidant enzymes and malondialdehyde content indicating oxidative damage and lipid peroxidation in the algal cells. Our findings reveal that triazophos has potential toxicity and environmental risks to one of the primary producers green algae. SN - 1095-9939 UR - https://www.unboundmedicine.com/medline/citation/35249646/Evaluation_of_the_acute_toxic_response_induced_by_triazophos_to_the_non_target_green_algae_Chlorella_pyrenoidosa_ DB - PRIME DP - Unbound Medicine ER -