UV-B辐射增强对甘薯光合特性和紫外吸收物质的影响

孟凡来,郭华春

Effects of Enhanced UV-B on Photosynthetic Characteristics and UV-Absorbing Compounds of Sweet Potato

Fanlai Meng,Huachun Guo

表1 UV-B辐射增强对甘薯叶片光合参数的影响

Table 1 Effects of enhanced UV-B on the photosynthetic parameters of sweet potato leaves

指标Index 处理 Treatment 处理时间Treatment time (d) 20 40 60 80 100 Pn [μmol CO2/(m2·s)] CK 25.25±1.16a 22.11±1.28a 29.51±2.47a 19.19±1.69a 19.91±1.95a T1 22.71±1.88b 19.24±0.78b 17.14±1.73b 15.70±0.88b 12.35±0.25b T2 18.79±1.03c 15.74±1.24c 16.62±1.55b 13.62±1.45b 11.97±1.45b Gs [mol H2O/(m2·s)] CK 0.45±0.05b 0.74±0.07a 0.35±0.05b 0.27±0.03b 0.19±0.02b T1 0.39±0.02b 0.77±0.06a 0.46±0.04a 0.32±0.01a 0.11±0.00c T2 0.62±0.04a 0.50±0.06b 0.32±0.04b 0.28±0.03ab 0.25±0.02a Ci [mol H2O/mol] CK 266.98±9.81b 321.28±7.10a 226.58±13.19c 253.96±14.11b 228.00±15.71b T1 253.86±16.02b 320.71±5.31a 298.49±13.23a 280.80±12.78a 200.99±5.69c T2 320.67±5.58a 310.95±10.47a 275.22±7.18b 286.03±15.08a 305.11±5.29a Tr [mmol H2O/(m2·s)] CK 11.74±0.58a 8.70±1.20a 9.97±2.05ab 8.82±0.79a 3.86±0.72b T1 10.02±1.07b 9.24±0.40a 10.74±0.90a 8.73±0.64a 2.39±0.05c T2 12.35±1.08a 7.43±0.47b 8.11±0.22b 8.41±1.22a 5.68±0.30a Ls CK 0.29±0.02a 0.16±0.01ab 0.54±0.07a 0.36±0.03a 0.47±0.06b T1 0.33±0.04a 0.14±0.01b 0.22±0.02b 0.27±0.04b 0.53±0.01a T2 0.17±0.01b 0.17±0.01a 0.27±0.02b 0.26±0.04b 0.23±0.01c