FAN Da-Yong,FU Zeng-Juan,XU Wen-Ting,XIE Zong-Qiang. A new method to measure and calculate light intensity and light quality simultaneously by using portable spectrometer[J]. Chin J Plan Ecolo, 2015, 39(9): 917-923.
Fig. 1 Spectrums of four experimental LED lamps and quantum yield of detector. The data source of quantum yield of detector: the instruction manual of AvaSpec-ULS2048×16/64 spectrometer.
Fig. 1 Spectrums of four experimental LED lamps and quantum yield of detector. The data source of quantum yield of detector: the instruction manual of AvaSpec-ULS2048×16/64 spectrometer.
Fig. 2 Relationships between photosynthetic photon flux density (PPFDλ) and the accumulated counts in the range of 400-700 nm (ACλ) of wavelength λ.
Fig. 2 Relationships between photosynthetic photon flux density (PPFDλ) and the accumulated counts in the range of 400-700 nm (ACλ) of wavelength λ.
Fig. 3 The Relationship between Countsλ/PPFDλ and 1/λQE(λ). Countsλ / PPFDλ, counts of wavelength λ / photosynthetic photon flux density of wavelength λ; QE (λ), quantum efficiency of CCD of wavelength λ.
Fig. 3 The Relationship between Countsλ/PPFDλ and 1/λQE(λ). Countsλ / PPFDλ, counts of wavelength λ / photosynthetic photon flux density of wavelength λ; QE (λ), quantum efficiency of CCD of wavelength λ.
Fig. 4 Spectrum of natural light and the relationship between calculated PPFD (PPFDc) and measured PPFD (PPFDm). PPFD, photosynthetic photon flux density.
Fig. 4 Spectrum of natural light and the relationship between calculated PPFD (PPFDc) and measured PPFD (PPFDm). PPFD, photosynthetic photon flux density.
Fig. 5 Spectrums of a blue light LED (wave peak = 453 nm) measured with different integral times (A) and the relationship between accumulated counts and integral time (B). The integration time of blue LED spectra in figure 5A from top to bottom, are 60, 50, 40, 30, 20, 15, 10, 8, 6 and 4 ms, respectively.
Fig. 5 Spectrums of a blue light LED (wave peak = 453 nm) measured with different integral times (A) and the relationship between accumulated counts and integral time (B). The integration time of blue LED spectra in figure 5A from top to bottom, are 60, 50, 40, 30, 20, 15, 10, 8, 6 and 4 ms, respectively.
Table 1 Calculated photosynthetoc photon flux density (PPFD) with different integral times
Hakala M, Touminen I, Keränen M, Tyystjärvi T, Tyystjärvi E (2005). Evidence for the role of the oxygen-evolving manganese complex in photoinhibition of photosystem II.Biochimica et Biophysica Acta, 1706, 68-80.
[2]
Lambers H, Chapin FS III, Pons TL (2008). Plant Physiological Ecology. Springer, New York.
Terashima I, Fujita T, Inoue T, Chow WS, Oguchi R (2009). Green light drives leaf photosynthesis more efficiently than red light in strong white light: Revisiting the enigmatic question of why leaves are green.Plant and Cell Physiology, 50, 684-697.
[5]
Yamamoto Y, Shen JR, Takahashi Y (2014). Editorial: Unraveling the molecular dynamics of thylakoids under light stress.Plant and Cell Physiology, 55, 1203-1205.
[6]
Zhang WF, Fan DY, Xie ZQ, Jiang XH (2005). The seasonal photosynthetic responses of seedlings of the endangered plant Cathaya argyrophylla to different growth light environments.Biodiversity Science, 13, 387-397.(in Chinese with English abstract)