两种杜鹃花属植物对长期遮阴后全光照环境的生理响应及其光保护机制

胡文海, 张斯斯, 肖宜安, 闫小红

Physiological responses and photo-protective mechanisms of two Rhododendron plants to natural sunlight after long term shading

HU Wen-Hai,ZHANG Si-Si,XIAO Yi-An,YAN Xiao-Hong

表1 长期遮阴后全光照5天对比利时杜鹃和杜鹃叶片PSII最大光化学效率(F_v/F_m)、初始斜率(α)、最大光合电子传递速率(J_max)和饱和光强(PAR_sat)的影响(平均值±标准误差, n = 5)

Table 1 Effects of natural sunlight exposure after long-term shading on the maximal quantum efficiency of PSII (F_v/F_m), initial slope (α), maximum photosynthetic electron flow (J_max) and maximum irradiance (PAR_sat) 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
参数 Parameter	遮阴 Shade	全光照 Sun	遮阴 Shade	全光照 Sun
F_v/F_m	0.793 ± 0.004^a	0.494 ± 0.029^b	0.817 ± 0.002^a	0.780 ± 0.002^b
α	0.392 ± 0.013^a	0.238 ± 0.018^b	0.333 ± 0.003^a	0.327 ± 0.007^a
J_max (μmol·m^-2·s^-1)	64.9 ± 6.8^a	37.8 ± 5.3^b	63.1 ± 8.3^a	74.9 ± 4.4^a
PAR_sat (μmol·m^-2·s^-1)	808.8 ± 37.0^a	818.4 ± 21.2^a	849.4 ± 24.3^b	943.2 ± 17.2^a