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- Title
Growth, gas exchange, and leaf anatomy of Echinodorus grandiflorus (Cham. & Schltr.) Micheli under Pb contamination.
- Authors
Ribeiro, Estefânia Santos; Pereira, Marcio Paulo; de Castro, Evaristo Mauro; de Resende Baroni, Gabriel; Duarte, Vinícius Politi; de Pádua, Maxwell Pereira; Pereira, Fabricio José
- Abstract
Lead (Pb) can be deposited in aquatic environments that are especially subject to pollution due to wastewater and sewage disposal. This study aimed to evaluate the tolerance of Echinodorus grandiflorus (Cham. & Schltr.) Micheli to Pb and changes in growth, gas exchange, and leaf anatomy. Experiments were conducted with E. grandiflorus plants exposed to the following Pb concentrations in nutrient solution: [0; 0.75; 1.5; 3.0 and 9.0 μM Pb (NO 3)2] in a greenhouse for 60 days. At the end of the experiment, the lead concentration, growth, leaf gas exchange, and changes in leaf anatomy were evaluated. There was no mortality of E. grandiflorus plants, and they accumulated higher concentrations of Pb proportional to the concentration of the pollutant in the solution. Pb did not cause significant changes in growth, stomatal conductance, transpiration, and Ci/Ca rate but reduced the photosynthesis in E. grandiflorus. The leaf anatomy showed significant changes in the presence of Pb, reducing the epidermis and chlorophyll parenchyma. E. grandiflorus demonstrated tolerance to Pb, surviving and growing under contamination; however, it negatively modified its leaf anatomy and photosynthesis in the presence of the metal.
- Subjects
DAMASCUS (Syria); LEAF anatomy; SEWAGE disposal; LEAD; GAS exchange in plants; GASES; CHLOROPHYLL
- Publication
Environmental Science & Pollution Research, 2024, Vol 31, Issue 28, p41059
- ISSN
0944-1344
- Publication type
Article
- DOI
10.1007/s11356-024-33851-4