AI Article Synopsis
- Ceylon leadwort is an ornamental plant that can tolerate lead pollution and has beneficial pharmacological properties due to its ability to produce various secondary metabolites.
- The study examined how the plant adapts to lead toxicity through changes in its photosynthetic system when grown in different concentrations of lead.
- Results showed that lower lead levels didn't significantly affect photosynthesis, while higher levels led to reduced photosynthetic pigments and structural changes in chloroplasts, indicating the plant's strategy to cope with lead was to accumulate it in roots and alter its photosynthetic processes.
Article Abstract
Ceylon leadwort () is ornamental plant known for its pharmacological properties arising from the abundant production of various secondary metabolites. It often grows in lead polluted areas. The aim of presented study was to evaluate the survival strategy of to lead toxicity via photosynthetic apparatus acclimatization. Shoots of were cultivated on media with different Pb concentrations (0.0, 0.05, and 0.1 g Pb∙l). After a four-week culture, the efficiency of the photosynthetic apparatus of plants was evaluated by Chl fluorescence measurement, photosynthetic pigment, and Lhcb1, PsbA, PsbO, and RuBisCo protein accumulation, antioxidant enzymes activity, and chloroplast ultrastructure observation. Plants from lower Pb concentration revealed no changes in photosynthetic pigments content and light-harvesting complex (LHCII) size, as well as no limitation on the donor side of Photosystem II Reaction Centre (PSII RC). However, the activity and content of antioxidant enzymes indicated a high risk of limitation on the acceptor side of Photosystem I. In turn, plants from 0.1 g Pb∙l showed a significant decrease in pigments content, LHCII size, the amount of active PSII RC, oxygen-evolving complex activity, and significant remodeling of chloroplast ultrastructure indicated limitation of PSII RC donor side. Obtained results indicate that plants acclimate to lead toxicity by Pb accumulation in roots and, depending on Pb concentration, by adjusting their photosynthetic apparatus via the activation of alternative (cyclic and pseudocyclic) electron transport pathways.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7084747 | PMC |
| http://dx.doi.org/10.3390/ijms21051866 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!