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引用次数: 0
摘要
本研究考察了重金属(包括镉、铅和锌)对冠突鹃叶绿素含量和叶片细胞结构的影响。在暴露于不同浓度的金属(0.015、0.065、0.250、1 和 4 毫克/升)后,研究人员对叶绿素含量、叶绿体数量、薄片细胞变化和金属积累进行了调查。叶绿素含量采用分光光度法进行评估,叶绿体数量和叶片细胞变化则在光学显微镜下进行检测。通过 ICP-MS 对金属积累进行了量化。研究结果表明,镉显著降低了叶绿素 a 的含量,而铅和锌的影响很小。镉和铅的暴露减少了叶片细胞中叶绿体的数量,而锌则没有影响。苔藓吸收金属的能力随着接触水平的提高而增强,这表明它有可能成为重金属污染的生物监测器。细胞在镉和铅的作用下死亡,主要发生在中间和顶端的薄片区域,而锌则没有影响。这项研究揭示了冠突散囊菌的重金属毒性,强调了其对环境监测的重要性。要全面了解这一关键问题,必须进一步研究重金属对叶绿体毒性的机制和后果。
Metal toxicity in Bryum coronatum Schwaegrichen: impact on chlorophyll content, lamina cell structure, and metal accumulation.
This research examined the impact of heavy metals, including Cd, Pb, and Zn, on chlorophyll content and lamina cell structure in Bryum coronatum. After exposure to varying metal concentrations (0.015, 0.065, 0.250, 1, and 4 mg/L), chlorophyll content, chloroplast numbers, lamina cell change, and metal accumulation were investigated. Chlorophyll content was assessed using spectrophotometry, whereas chloroplast numbers and lamina cell changes were examined under a light microscope. Metal accumulation was quantified through ICP-MS. The findings revealed that Cd notably reduced chlorophyll a content, while Pb and Zn showed minimal influence. Cd and Pb exposure decreased the number of chloroplasts in lamina cells, with no impact from Zn. The moss's capacity to absorb metals increased with higher exposure levels, indicating its potential as a biomonitor for heavy metal pollution. Cell mortality occurred in response to Cd and Pb, primarily in the median and apical lamina regions, while Zn had no effect. This study sheds light on heavy metal toxicity in B. coronatum, underscoring its significance for environmental monitoring. Further research on the mechanisms and consequences of heavy metal toxicity in bryophytes is essential for a comprehensive understanding of this critical issue.
期刊介绍:
The International Journal of Phytoremediation (IJP) is the first journal devoted to the publication of laboratory and field research describing the use of plant systems to solve environmental problems by enabling the remediation of soil, water, and air quality and by restoring ecosystem services in managed landscapes. Traditional phytoremediation has largely focused on soil and groundwater clean-up of hazardous contaminants. Phytotechnology expands this umbrella to include many of the natural resource management challenges we face in cities, on farms, and other landscapes more integrated with daily public activities. Wetlands that treat wastewater, rain gardens that treat stormwater, poplar tree plantings that contain pollutants, urban tree canopies that treat air pollution, and specialized plants that treat decommissioned mine sites are just a few examples of phytotechnologies.