, Volume 56, Issue 2, pp 616–622 | Cite as

Effects of exogenous phenolic acids on photosystem functions and photosynthetic electron transport rate in strawberry leaves

  • X. F. Lu
  • H. Zhang
  • S. S. Lyu
  • G. D. DuEmail author
  • X. Q. Wang
  • C. H. Wu
  • D. G. Lyu
Original paper


Our study investigated the physiological and biochemical basis for the effects of exogenous phenolic acids on the function of the photosynthetic apparatus and photosynthetic electron transport rate in strawberry seedlings. Potted seedlings of the strawberry (Fragaria × ananassa Duch.) were used. Syringic acid inhibited net photosynthetic rate and water-use efficiency decreased. Additionally, primary quinone electron acceptor of the PSII reaction centre, the PSII reaction centre and the oxygen evolving complex were also impaired. Both the maximum quantum yield of the PSII primary photochemistry and the performance index on absorption basis were depressed, resulting in reduced function of the photosynthetic electron transport chain. Otherwise, low phthalic acid concentrations enhanced photosynthetic capacity, while high concentrations showed opposite effects. Syringic acid exhibited a higher toxic effect than that of phthalic acid which was more evident at higher concentrations.

Additional key words

chlorophyll fluorescence gas exchange phenolic acid 



reaction center area




intercellular CO2 concentration


transpiration rate


electron transport rate


fluorescence yield at 2 ms


fluorescence yield at 300 μs


maximal fluorescence yield of the light-adapted state


fresh mass


minimal fluorescence yield of the dark-adapted state


maximum quantum yield of PSII primary photochemistry


stomatal conductance


modulated reflection of PSI at 820 nm


oxygen evolving complex


phthalic acid


performance index on absorption basis


net photosynthetic rate


the chlorophyll a maximum absorption peak of molecules at 700 nm


the energy absorbed by active reaction center


syringic acid


relative variable fluorescence at 300 μs


relative variable fluorescence at the J-step


MR/MR0 maximal slope descending


MR/MR0 maximal slope increasing


relative variable fluorescence at the K-step


water-use efficiency (= PN/E)


the ratio of trapped exciton electrons to other electron acceptors downstream of QA.


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Copyright information

© The Institute of Experimental Botany 2018

Authors and Affiliations

  • X. F. Lu
    • 1
  • H. Zhang
    • 1
  • S. S. Lyu
    • 1
  • G. D. Du
    • 1
    • 2
    Email author
  • X. Q. Wang
    • 1
    • 2
  • C. H. Wu
    • 1
  • D. G. Lyu
    • 1
    • 2
  1. 1.College of HorticultureShenyang Agricultural UniversityShenyang, Liaoning ProvinceChina
  2. 2.Research Laboratory for Breeding and Physiology-Ecology of Northern Fruit Tree, Shenyang Agricultural UniversityLiaoning ProvinceShenyangChina

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