Abstract
Soil metal contamination leads to a decrease in a yield of crops and is a threat to human health. In the present study, the properties (i.e., photosynthetic pigments, gas-exchange parameters, chlorophyll fluorescence, biomass, leaf area, leaf mass per area) of three green vegetables (i.e., Brassica chinensis, Chrysanthemum coronarium, Brassica alboglabra) grown under various Cu treatments [0, 200, 400, and 600 mg(Cu) kg–1] were measured and analysed. The results showed that soil Cu contamination resulted in the damage of photosynthetic pigments, negative effects on gas exchange, and hampered growth of all three vegetables. However, it did not significantly influence PSII functions of the three vegetables. It indicates that soil Cu contamination negatively affected photosynthesis particularly due to stomatal factors, but not due to the damage of photosynthetic apparatus.
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Abbreviations
- ABS/RC:
-
absorption
- Car:
-
carotenoids
- Chl:
-
chlorophyll
- C i :
-
intercellular CO2 concentration
- DFabs :
-
driving forces
- DI0/RC:
-
dissipation at t = 0
- E :
-
transpiration rate
- ET0/RC:
-
electron transport at t = 0
- Fm :
-
maximum Chl fluorescence intensity
- F0 :
-
minimum Chl fluorescence intensity
- Fv/Fm :
-
maximum yield of PSII photochemistry
- gs:
-
stomatal conductance
- HCu:
-
high Cu contamination
- LA:
-
leaf area
- LCu:
-
low Cu contamination
- LMA:
-
leaf mass per area
- MCu:
-
middle Cu contamination
- OEC:
-
oxygen-evolving complex
- PIabs :
-
photosynthetic performance index
- P N :
-
net photosynthetic rate
- QA :
-
primary bound plastoquinone
- QB :
-
secondary bound plastoquinone
- RC:
-
reaction center
- TR0/RC:
-
energy flux for trapping at t = 0
- φE0 :
-
probability that an absorbed photon will move an electron into the electron transport chain
- φP0 :
-
maximum quantum yield of primary photochemistry
- ΨE0 :
-
efficiency with which a trapped exciton can move an electron into the electron transport chain
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Acknowledgements: We thank three anonymous reviewers and the associate editor for their constructive comments that improved this manuscript. This study was partly supported by Natural Science Foundation of China (31370589) and the Open Project Program of Provincial Key Laboratory of Eco-Industrial Green Technology, Wuyi University. We would like to thank L.-R. Lin, A.-L. Liu, and L.-Y. Zhu, Fuqing Branch of Fujian Normal University, for their help in experiment.
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Lin, MZ., Jin, MF. Soil Cu contamination destroys the photosynthetic systems and hampers the growth of green vegetables. Photosynthetica 56, 1336–1345 (2018). https://doi.org/10.1007/s11099-018-0831-7
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DOI: https://doi.org/10.1007/s11099-018-0831-7