Xue Meijing, Shi Yajun, Xiang Jing, Zhang Yan, Qiu Hanxun, Chen Wenming, Zhang Jiliang
Ministry of Education Key Laboratory for Ecology of Tropical Islands, Key Laboratory of Tropical Animal and Plant Ecology of Hainan Province, College of Life Sciences, Hainan Normal University, Haikou 571158, China.
Hainan Provincial Key Laboratory of Ecological Civilization and Integrated Land-Sea Development, Hainan Normal University, Haikou 571158, China.
Toxics. 2024 Jun 25;12(7):456. doi: 10.3390/toxics12070456.
2,2',4,4'-tetra-bromodiphenytol ether (BDE-47) is one of the ubiquitous organic pollutants in mangrove sediments. To reveal the toxic effects of BDE-47 on mangrove plants, the mangrove species was used to investigate the photosynthetic capacity effects and the molecular mechanisms involved after BDE-47 exposure at environment-related levels (50, 500, and 5000 ng g dw). After a 60-day exposure, the photosynthetic capacity was inhibited in seedlings, and a decrease in the stomatal density and damage in the chloroplast ultrastructure in the leaves were found. Transcriptome sequencing showed that, following exposure to BDE-47, gene expression in photosynthesis-related pathways was predominantly suppressed in the leaves. The bioinformatics analysis indicated that BDE-47 exerts toxicity by inhibiting photosystem I activity and chlorophyll a/b-binding protein-related genes in the leaves of . Thus, this study provides preliminary theoretical evidence for the toxic mechanism effect of BDE-47 on photosynthesis in mangrove species.
2,2',4,4'-四溴二苯醚（BDE-47）是红树林沉积物中普遍存在的有机污染物之一。为揭示BDE-47对红树林植物的毒性效应，采用红树林物种研究了在环境相关水平（50、500和5000 ng g干重）下暴露于BDE-47后其光合能力效应及相关分子机制。暴露60天后，幼苗的光合能力受到抑制，叶片气孔密度降低，叶绿体超微结构受损。转录组测序表明，暴露于BDE-47后，叶片中光合作用相关途径的基因表达主要受到抑制。生物信息学分析表明，BDE-47通过抑制[物种名称未给出]叶片中的光系统I活性和叶绿素a/b结合蛋白相关基因发挥毒性作用。因此，本研究为BDE-47对红树林物种光合作用的毒性机制效应提供了初步理论证据。
