不同砧木对克瑞森无核葡萄叶片光合光效的影响

目的]分析不同砧木对克瑞森无核葡萄光合性能影响,为筛选优良适宜克瑞森无核葡萄的砧木品种提供参考.方法]以7种不同砧木5BB、5C、101-14MG、110R、SO4、188-08和贝达嫁接的6年生克瑞森无核和克瑞森无核自根苗为试材,采用SPAD502测定相对叶绿素含量;TPS-2光合仪测定光合参数,运用直角双曲线修...

Effects of Different Rootstocks on Photosynthetic Efficiency of Grape Leaves in Crimson Seedless Grape

【Objective】 To analyze the effects of different rootstocks on photosynthetic performance of Crimson seedless grape with a view to providing reference for the selection of excellent rootstocks suitable for the grape. 【Methods】 SPAD502 was used to determine the relative chlorophyll content of 6 year old Crimson seedless and Crimson seedless self-root seedlings grafted with 7 different rootstocks, 5BB, 5C, 101-14MG, 110R, SO4, 188-08 and Beta. The TPS-2 photosynthetic apparatus was used to measure the photosynthetic parameters, and data models such as right-angle hyperbolic correction model and Freundlich model were used to fit the data, and the saturation light intensity and light compensation point were calculated. 【Results】 The results showed that there were significant or extremely significant differences in leaf indexes between different rootstocks of scion Crimson seedless and self-root seedlings. The leaf area and SPAD of the 101-14MG grafted Crimson were the highest, reaching 146.85 mm² and 44.99, and the maximum net photosynthetic rate of the stock 5BB grafting was the highest, reaching 17.68 μmol/(m ²·s). The second rate was 101-14MG, which was 16.01 μmol/(m²·s), slightly less than that of 5BB grafting. The net photosynthetic rate of Crimson without nucleation was the lowest in 118-08 grafting, which was 12.31 μmol/(m²·s). Rootstocks with good performance in dark respiration rate were 188-08 and Beta, with dark respiration rate of only 1.36and 1.33 μmol/(m² ·s). The 101-14MG grafted Crimson nucleus-free light compensation point was the highest (95.58 μmol/(m ²·s)), followed by 110R, and the lowest (45.92 μmol/(m²·s)). The Crimson and the Crimson without nucleus were grafted with stock 101-14MG and 5BB. The utilization rate of Crimson without nucleus was the highest (1.850%), followed by that of Crimson without nucleus (1.625%) with 5BB grafting. 【Conclusion】 The results showed that rootstock 101-14MG significantly increased the leaf area and chlorophyll content of scion Crimson seedless grape. The maximum net photosynthetic rate, quantum efficiency and light adaptation range of rootstock 101-14MG and 5 BB grafted with Crimson seedless grape were better than those of other rootstocks, which is beneficial to improve photosynthesis of scion Crimson seedless grape leaves.