| 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 |
- 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)