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Bioresources and Bioprocessing

Table 2 Parameters of the relative electron transport rate (rETR) versus irradiance curves of haploid (1N) and diploid (2N) Emiliania huxleyi after acclimation to growth light or 1 h of acute exposure to PAR or PAR + UVR

From: Different photosynthetic responses of haploid and diploid Emiliania huxleyi (Prymnesiophyceae) to high light and ultraviolet radiation

 

1N

2N

Growth light

PAR

PAR + UVR

Growth light

PAR

PAR + UVR

rETRmax

42.4 ± 2.6b

27.8 ± 1.9d

26.0 ± 2.5d

54.7 ± 2.8a

53.1 ± 5.8a

36.2 ± 2.2c

a

0.19 ± 0.01b

0.16 ± 0.01c

0.14 ± 0.01d

0.22 ± 0.00a

0.22 ± 0.01a

0.17 ± 0.01c

Ek

221 ± 21a

173 ± 5b

199 ± 28ab

245 ± 10a

245 ± 21a

215 ± 24a

  1. The growth light, PAR and UVR were 20.8 W m−2 (100 µmol photons m−2 s−1), 83.3 W m−2 (400 µmol photons m−2 s−1) and 19.0 W m−2, respectively. rETRmax, maximum relative electron transport rate; a, slope of the light-limited portion of the rETR versus irradiance curve; Ek (µmol photons m−2 s−1), the irradiance at which energy becomes saturated for electron transport. The values are shown as the mean ± standard deviation (n = 3). Different letters denote significantly different means between different life-cycle phases and radiation treatments (P < 0.05)
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