, Volume 43, Issue 3, pp 457–462 | Cite as

Photosynthetic responses of radish (Raphanus sativus var. longipinnatus) plants to infection by turnip mosaic virus

  • Y.-P. Guo
  • D.-P. GuoEmail author
  • Y. Peng
  • J.-S. Chen


Plant growth, chlorophyll (Chl) content, photosynthetic gas exchange, ribulose-1,5-bisphosphate carboxylase (RuBPCO) enzyme activity, and Chl fluorescence in radish (Raphanus sativus var. longipinnatus) plants were examined after turnip mosaic virus (TuMV) infection. Plant fresh mass, dry mass, Chl content, net photosynthetic rate (PN), transpiration rate (E), stomatal conductance (gs), and RuBPCO activity were significantly lower in infected plants after 5 weeks of virus infection as compared to healthy plants. The 5-week virus infection did not induce significant differences in intercellular CO2 concentration (Ci, photochemical efficiency of photosystem 2, PS2 (Fv/Fm), excitation capture efficiency of open PS2 reaction centres (Fv'/Fm'), effective quantum efficiency of photosystem 2 (ΔF/Fm'), and photochemical quenching (qP), but non-photochemical quenching (qN) and alternative electron sink (AES) were significantly enhanced. Thus the decreased plant biomass of TuMV-infected plants might be associated with the decreased photosynthetic activity mainly due to reduced RuBPCO activity.

Additional key words

chlorophyll fluorescence gas exchange photosystem 2 photochemical activity ribulose-1,5-bisphosphate carboxylase/oxygenase 



alternative electron sinks


intercellular CO2 concentration


CO2 carboxylation efficiency




transpiration rate


apparent electron transport rate


photochemical efficiency of PS2


excitation capture efficiency of open PS2 reaction centres


effective quantum efficiency of photosystem 2


stomatal conductance


photon flux density


net photosynthetic rate


photochemical quenching of chlorophyll fluorescence


non-photochemical quenching of chlorophyll fluorescence


ribulose-1,5-bisphosphate carboxylase/oxygenase


turnip mosaic virus


quantum efficiency CO2 assimilation


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Copyright information

© Institute of Experimental Botany, Academy of Sciences of the Czech Republic, Praha 2005

Authors and Affiliations

  1. 1.Department of Horticulture, College of Agriculture and BiotechnologyZhejiang UniversityHangzhouP. R. China
  2. 2.Institute of BioengineeringZhejiang University of SciencesHangzhou, XiashaP. R. China

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