Chin J Plant Ecol ›› 2010, Vol. 34 ›› Issue (12): 1463-1471.DOI: 10.3773/j.issn.1005-264x.2010.12.013

• Research Articles • Previous Articles     Next Articles

Comparison of photosynthetic and fluorescence characteristics among taxa in Paeonia sect. Paeonia

JIAN Zai-You1,2, WANG Wen-Quan2,*(), MENG Li1, XU Gui-Fang1, WANG Qiu-Ling2, LI Wei-Dong2, YU Jing-Bo2   

  1. 1School of Biological Science and Technology, Henan Institute of Science and Technology, Xinxiang, Henan 453003, China
    2School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing 100102, China
  • Received:2010-01-13 Accepted:2010-05-07 Online:2010-01-13 Published:2010-12-28
  • Contact: WANG Wen-Quan


Aims Our aims are to compare the photosynthetic and fluorescence characteristics in different species in Paeonia sect. Paeonia and to determine how these species fit different circumstances in photosynthesis. This information will be important in protecting and using these wild resources.
Methods The LI-6400 Portable Photosynthesis System was used to determine diurnal photosynthetic changes, light-response curves and CO2-response curves of different species in sect. Paeonia under good growth conditions. The OS5-FL modulated chlorophyll fluorometer was used to determine their chlorophyll fluorescence characteristics. The light-response curves and CO2-response curves were simulated with modified rectangular and nonrectangular hyperbolic models.
Important findings We found an obvious difference between photosynthetic rates of species in sect. Paeonia. The simulated result with modified rectangular hyperbolic model is more consistent with the result determined than the other model. The index of light-response curves and CO2-response curves differ among species. Paeonia veitchii, P. anomala, P. mairei, P. anomala var. intermedia and P. lactiflora have the characteristic of “siesta”, but it is not obvious in P. lactiflora var. trichocarpa. The index of chlorophyll fluorescence characteristics reflects the photosynthetic characteristics. The photosynthetic characteristics of P. lactiflora and P. lactiflora var. trichocarpa embody their strong adaptability.

Key words: CO2-response curve, diurnal photosynthetic changes, light-response curve, Paeonia lactiflora, simulating model