The effects of copper on photosynthesis and biomolecules yield in Chlorolobion braunii
© 2019 Phycological Society of America.
| Veröffentlicht in: | Journal of phycology. - 1966. - 55(2019), 6 vom: 01. Dez., Seite 1335-1347 |
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| Format: | Online-Aufsatz |
| Sprache: | English |
| Veröffentlicht: |
2019
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| Zugriff auf das übergeordnete Werk: | Journal of phycology |
| Schlagworte: | Journal Article biochemical composition copper microalgae quantum yields rapid light curves Chlorophyll 1406-65-1 Copper 789U1901C5 mehr... |
| Zusammenfassung: | © 2019 Phycological Society of America. Our knowledge of the effects of copper on microalgal physiology is largely based on studies conducted with high copper concentrations; much less is known when environmentally relevant copper levels come into question. Here, we evaluated the physiology of Chlorolobion braunii exposed to free copper ion concentrations between 5.7 × 10-9 and 5.0 × 10-6 mol · L-1 , thus including environmentally relevant values. Population growth and maximum photosynthetic quantum yield of PSII were determined daily during the 96 h laboratory controlled experiment. Exponentially-growing cells (48 h) were analyzed for effective quantum yield and rapid light curves (RLC), and total lipids, proteins, carbohydrates, chlorophyll a and carotenoids were determined. The results showed that growth rates and population density decreased gradually as copper increased in experiment, but the photosynthetic parameters (maximum and effective quantum yields) and photochemical quenching (qP) decreased only at the highest free copper concentration tested (5.0 × 10-6 mol · L-1 ); nonphotochemical quenching (NPQ) increased gradually with copper increase. The RLC parameters Ek and rETRmax were inversely proportional to copper concentration, while α and Im decreased only at 5.0 × 10-6 mol · L-1 . The effects of copper in biomolecules yield (mg · L-1 ) varied depending on the biomolecule. Lipid yield increased at free copper concentration as low as 2.5 × 10-8 mol · L-1 , but proteins and carbohydrates were constant throughout |
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| Beschreibung: | Date Completed 08.05.2020 Date Revised 08.05.2020 published: Print-Electronic Citation Status MEDLINE |
| ISSN: | 1529-8817 |
| DOI: | 10.1111/jpy.12914 |