C4作物电子传递速率对CO2响应模型的构建及应用

叶子飘,段世华,安婷,康华靖

Construction of CO2-response model of electron transport rate in C4 crop and its application

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

表1 由模型I拟合玉米和千穗谷的光合作用对CO2的响应曲线(Ac-Ca)得到光合参数以及相应的估算值(平均值±标准误差, n = 5)

Table 1 Estimated values and results fitted by model I for CO2-response curves of photosynthesis (Ac-Ca) in maize and grain amaranth (mean ± SE, n = 5)

光合参数 Photosynthetic parameter 玉米 Maize 千穗谷 Grain amaranth 拟合值 Fitted value 估算值 Estimated value 拟合值 Fitted value 估算值 Estimated value αc 0.247 ± 0.033b — 0.334 ± 0.022a — Ac-max (mmol·m-2·s-1) 59.12 ± 0.67b ? 60.39 69.97 ± 0.71a ? 70.49 Ca-sat (mmol·mol-1) 1 335.74 ± 196.52a ? 1 400 976.25 ± 12.06b ? 1 000 Γ (mmol·mol-1) 4.35 ± 2.08b ? 4.25b 12.77 ± 0.53a ? 13.41 Rl (mmol·m-2·s-1) 1.13 ± 0.64b ? 0.24 2.44 ± 0.15a ? 0.28 R2 0.997 — 0.991 —