播种至苗期不同阶段低温对玉米幼苗生长及生理抗性的影响

菅立群, 张翼飞, 杨克军, 王玉凤, 陈天宇, 张继卫, 张津松, 李庆, 刘天昊, 肖珊珊, 彭程, 王宝生

Effects of Low Temperature under Different Phases between Sowing and Seedling Periods on Growth and Physiological Resistance of Maize Seedlings

Jian Liqun, Zhang Yifei, Yang Kejun, Wang Yufeng, Chen Tianyu, Zhang Jiwei, Zhang Jinsong, Li Qing, Liu Tianhao, Xiao Shanshan, Peng Cheng, Wang Baosheng

表3 不同阶段低温、低温持续天数对玉米幼苗光合作用与抗性生理特性的交互效应

Table 3 Interactive effects of low temperature treatment phases and durations on characteristics of maize seedling leaf photosynthesis and physiological indexes for resistance

试验因素 Experimental factor 处理 Treatment SPAD Fv/Fm 可溶性蛋白含量 Soluble protein content (mg/g FW) 脯氨酸含量 Proline content (μg/g FW) 可溶性糖含量 Soluble sugar content (mg/g FW) 丙二醛含量 Malondialdehyde content (μmol/g FW) P P1 33.94a 0.764a 2.85e 24.90d 0.62e 3.45e P2 33.72a 0.760a 2.98d 25.28cd 0.67d 3.66d P3 33.35a 0.752b 3.00d 26.05c 0.80c 4.11c P4 29.74c 0.737d 3.33a 30.52a 0.93a 4.55a P5 31.30b 0.743cd 3.29b 29.11b 0.83b 4.35b P6 31.92b 0.749bc 3.11c 28.74b 0.81c 4.14c D D0 36.13a 0.767a 2.37f 20.66f 0.44f 2.95f D1 33.35b 0.756b 2.73e 23.24e 0.62e 3.71e D2 32.55b 0.753bc 2.96d 25.82d 0.72d 4.01d D3 31.33c 0.747cd 3.23c 29.38c 0.83c 4.26c D4 30.71cd 0.742de 3.52b 31.36b 0.94b 4.51b D5 29.91d 0.738e 3.75a 34.16a 1.11a 4.81a F值F-value P 29.28** 14.17** 382.70** 72.26** 450.61** 188.36** D 54.20** 15.42** 2 921.27** 349.68** 1 940.62** 470.94** P×D 1.80* 0.93 86.20** 4.97** 31.30** 9.32**