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2 由模型II拟合玉米和千穗谷的光合电子传递速率对CO2的响应曲线(J-Ca )得到Jmax和Ca-sat等参数以及相应的估算值(平均值±标准误差, n = 5)

Table 2 Estimated values and results fitted by model II for CO2-response curves of photosynthetic electron transport rate (J-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 αce (mol·m-2·s-1) 1.215 ± 0.543a — 1.208 ± 0.357a — Jmax (mmol·m-2·s-1) 262.41 ± 1.64b ? 265.66 393.07 ± 37.84a ? 397.82 Ca-sat (mmol·mol-1) 1 198.58 ± 342.78a ? 1 200 1 229.10 ± 59.14a ? 1 200 J0 (mmol·m-2·s-1) 22.22 ± 8.35a ? 27.69 27.43 ± 4.97a ? 29.26 R2 0.978 — 0.992 —