Photosynthetic efficiency of perennial ryegrass (Lolium perenne L.) seedlings in response to Ni and Cd stress

Perennial ryegrass is a grass species used to establish lawns in urban areas where pollution is a major environmental problems. Cadmium (Cd) and nickel (Ni) contribute significantly to these pollutants and may cause photosynthetic limitation. The main objective of this work was to perform a comprehe...

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Published in:Scientific reports 2023-04, Vol.13 (1), p.5357-5357, Article 5357
Main Authors: Dąbrowski, Piotr, Keutgen, Anna Jadwiga, Keutgen, Norbert, Sierka, Edyta, Baczewska-Dąbrowska, Aneta Helena, Mojski, Jacek, Pawluśkiewicz, Bogumiła, Sieczko, Leszek, Kalaji, Hazem M.
Format: Article
Language:English
Subjects:
631/443
631/449
704/172
Cadmium
Cadmium - toxicity
Chlorophyll
Cultivars
Efficiency
Electron transport
Grasses
Heavy metals
Humanities and Social Sciences
Lolium - metabolism
Lolium perenne
multidisciplinary
Nickel
Photosynthesis - physiology
Photosystem
Photosystem II
Photosystem II Protein Complex - metabolism
Plant growth
Reflectance
Science
Science (multidisciplinary)
Seedlings
Seedlings - metabolism
Urban areas
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Summary:Perennial ryegrass is a grass species used to establish lawns in urban areas where pollution is a major environmental problems. Cadmium (Cd) and nickel (Ni) contribute significantly to these pollutants and may cause photosynthetic limitation. The main objective of this work was to perform a comprehensive analysis of photosynthetic efficiency of perennial ryegrass seedlings under Cd and Ni stress. Some of the main indices of photosynthetic efficiency (prompt and delayed chlorophyll-a fluorescence signals and modulated reflectance at 820 nm) were compared with growth parameters. Two cultivars were tested: 'Niga' and 'Nira'. A decrease in photosystem (PS) II and PSI activity was observed. This was due to an increase in nonradiative dissipation of the PSII antenna, a decrease in PSII antenna size, or a decrease in the number of photosynthetic complexes with fully closed PSII RCs. Efficiency of electron transport was decreased. The effect on the modulated reflectance signal could indicate a restriction in electron flow from PSII to PSI. The correlation between photosynthetic efficiency parameters, such as Area, Fo, Fm, and Fv, and growth parameters, confirmed that some photosynthetic efficiency parameters can be used as indicators for early detection of heavy metal effects.
ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-023-32324-x