最大电子传递速率的确定及其对电子流分配的影响

叶子飘,段世华,安婷,康华靖

Determination of maximum electron transport rate and its impact on allocation of electron flow

Zi-Piao YE,Shi-Hua DUAN,Ting AN,Hua-Jing KANG

表2 由非直角双曲线模型(模型I)和光合电子流对光响应机理模型(模型II)拟合两种光照条件下光合作用对光的响应曲线(A_n-I)得到的光合参数及观测数据(平均数±标准误差, n = 5)

Table 2 Observed data and photosynthetic parameters fitted by non-rectangular hyperbola model (model I) and the mechanistic model of light-response of electron transport rate (model II) for light-response curves of photosynthesis (A_n-I curves) of soybean under two light environments, respectively (mean ± SE, n = 5).

参数 Parameter	处理 Treatment
	遮阴 Shading			全日照 Full sunlight
	模型I Model I	模型II Model II	测量值 Observed value	模型I Model I	模型II Model II	测量值 Observed value
初始斜率 Initial slope of A-I curve, α (mmol·mol^-1)	0.061 ± 0.044^b	0.081 ± 0.032^a	-	0.064 ± 0.025^a	0.069 ± 0.025^a	-
最大净光合速率 Maximum net photosynthetic rate, A_nmax(mmol·m^-2·s^-1)	31.28 ± 1.33^a	26.92 ± 1.23^b	?27.23	45.56 ± 1.41^a	35.52 ± 1.26^b	?36.17
饱和光强 Saturated irradiance, I_sat(mmol ·m^-2·s^-1)	-	1 569.96 ± 24.89	?1 600	-	1 998.36 ± 36.45	?1 800
光补偿点 Light compensation point, I_c(mmol·m^-2·s^-1)	40.65 ± 2.85^a	40.83 ± 2.74^a	?41.59	51.49 ± 3.52^a	51.62 ± 3.45^a	?51.96
暗呼吸速率 Dark respiration, R_d(mmol·m^-2 ·s^-1)	2.42 ± 0.87^b	2.99 ± 0.58^a	?3.12	3.19 ± 0.56^a	3.45 ± 0.42^a	?3.51
确定系数 Determination coefficient, R²	0.999	0.999	0.999	0.999	0.999	0.999