Chin J Plan Ecolo ›› 2015, Vol. 39 ›› Issue (11): 1093-1100.DOI: 10.17521/cjpe.2015.0106
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HU Wen-Hai1,2,*, ZHANG Si-Si2, XIAO Yi-An1,2, YAN Xiao-Hong1,2
Received:
2015-04-15
Accepted:
2015-09-30
Online:
2015-11-01
Published:
2015-12-02
Contact:
Wen-Hai HU
About author:
# Co-first authors
HU Wen-Hai,ZHANG Si-Si,XIAO Yi-An,YAN Xiao-Hong. Physiological responses and photo-protective mechanisms of two Rhododendron plants to natural sunlight after long term shading[J]. Chin J Plan Ecolo, 2015, 39(11): 1093-1100.
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URL: https://www.plant-ecology.com/EN/10.17521/cjpe.2015.0106
参数 Parameter | 比利时杜鹃 R. hybrida | 杜鹃 R. simsii | |||
---|---|---|---|---|---|
遮阴 Shade | 全光照 Sun | 遮阴 Shade | 全光照 Sun | ||
Fv/Fm | 0.793 ± 0.004a | 0.494 ± 0.029b | 0.817 ± 0.002a | 0.780 ± 0.002b | |
α | 0.392 ± 0.013a | 0.238 ± 0.018b | 0.333 ± 0.003a | 0.327 ± 0.007a | |
Jmax (μmol·m-2·s-1) | 64.9 ± 6.8a | 37.8 ± 5.3b | 63.1 ± 8.3a | 74.9 ± 4.4a | |
PARsat (μmol·m-2·s-1) | 808.8 ± 37.0a | 818.4 ± 21.2a | 849.4 ± 24.3b | 943.2 ± 17.2a |
Table 1 Effects of natural sunlight exposure after long-term shading on the maximal quantum efficiency of PSII (Fv/Fm), initial slope (α), maximum photosynthetic electron flow (Jmax) and maximum irradiance (PARsat) in Rhododendron hybrida and R. simsii leaves (mean ± SE, n = 5)
参数 Parameter | 比利时杜鹃 R. hybrida | 杜鹃 R. simsii | |||
---|---|---|---|---|---|
遮阴 Shade | 全光照 Sun | 遮阴 Shade | 全光照 Sun | ||
Fv/Fm | 0.793 ± 0.004a | 0.494 ± 0.029b | 0.817 ± 0.002a | 0.780 ± 0.002b | |
α | 0.392 ± 0.013a | 0.238 ± 0.018b | 0.333 ± 0.003a | 0.327 ± 0.007a | |
Jmax (μmol·m-2·s-1) | 64.9 ± 6.8a | 37.8 ± 5.3b | 63.1 ± 8.3a | 74.9 ± 4.4a | |
PARsat (μmol·m-2·s-1) | 808.8 ± 37.0a | 818.4 ± 21.2a | 849.4 ± 24.3b | 943.2 ± 17.2a |
Fig. 1 Rapid light curves of ETR(II) and ETR(I)/ETR(II) in Rhododendron hybrida and R. simsii leaves during transition from long-term shading to 5 days of sun exposures (mean ± SE, n = 5). ETR(I), ETR(II), apparent electron transport rate at PSI and PSII; PAR, photosynthetic active radiation.
Fig. 2 Rapid light curves of photochemical quenching (qP) and non-photochemical quenching (NPQ) in Rhododendron hybrida and R. simsii leaves during transition from long-term shading to 5 days of sunlight exposures (mean ± SE, n = 5). PAR, photosynthetic active radiation.
Fig. 3 Rapid light curves of effective PSII quantum (Y(II)), quantum yield of regulated energy dissipation (Y(NPQ)) and quantum yield of nonregulated energy dissipation (Y(NO)) in Rhododendron hybrida and R. simsii leaves during transition from long-term shading to 5 days of sunlight exposures (mean ± SE, n = 5). PAR, photosynthetic active radiation.
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