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Effects of the red:far-red light ratio on photosynthetic characteristics of greenhouse cut Chrysanthemum - Short communication

Author

Listed:
  • Z.Q. Yang

    (Jiangsu Key Laboratory of Agricultural Meteorology, Nanjing University of Information Science Technology, Nanjing, China
    College of Applied Meteorology, Nanjing University of Information Science Technology, Nanjing, China)

  • Y.X. Li

    (Jiangsu Key Laboratory of Agricultural Meteorology, Nanjing University of Information Science Technology, Nanjing, China
    College of Applied Meteorology, Nanjing University of Information Science Technology, Nanjing, China)

  • J.B. Zhang

    (College of Applied Meteorology, Nanjing University of Information Science Technology, Nanjing, China)

  • J. Zhang

    (College of Applied Meteorology, Nanjing University of Information Science Technology, Nanjing, China)

  • J. Zhu

    (College of Applied Meteorology, Nanjing University of Information Science Technology, Nanjing, China)

  • L.L. Gu

    (College of Applied Meteorology, Nanjing University of Information Science Technology, Nanjing, China)

  • B. Zhang

    (College of Applied Meteorology, Nanjing University of Information Science Technology, Nanjing, China)

Abstract

For the use of LED as a light source to regulate the photosynthesis of chrysanthemum leaves under greenhouse conditions, the effects of different red (660 ± 30 nm) to far-red (730 ± 30 nm) radiation ratios (R:FR) on the photosynthetic characteristics and chlorophyll fluorescence parameters of chrysanthemum leaves were studied. Red and far-red LED light sources were combined in different proportions to produce four R:FR ratio treatments: 0.5, 2.5, 4.5 and 6.5. The chlorophyll a content, SPAD value, net photosynthetic rate, light-saturated maximum photosynthetic rate, CO2-saturated carboxylation rate, apparent quantum efficiency and carboxylation efficiency were all the highest under the R:FR ratio of 2.5, followed by the R:FR ratio of 4.5. Potential photochemical efficiency of photosystem II, photochemical quenching and electron transport rate for the R:FR ratios of 2.5 and 4.5 were markedly higher than those for 0.5 and 6.5, however, those parameters did not differ significantly between the R:FR ratios of 2.5 and 4.5.

Suggested Citation

  • Z.Q. Yang & Y.X. Li & J.B. Zhang & J. Zhang & J. Zhu & L.L. Gu & B. Zhang, 2013. "Effects of the red:far-red light ratio on photosynthetic characteristics of greenhouse cut Chrysanthemum - Short communication," Horticultural Science, Czech Academy of Agricultural Sciences, vol. 40(1), pages 40-43.
    • Handle: RePEc:caa:jnlhor:v:40:y:2013:i:1:id:43-2012-hortsci
    DOI: 10.17221/43/2012-HORTSCI
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