不同矮化中间砧木对库尔勒香梨光合特性的影响

doi:10.6048/j.issn.1001-4330.2020.09.013

摘要/Abstract

摘要： 【目的】 研究中矮1号、中矮2号、中矮3号和杜梨对库尔勒香梨光合荧光特性的影响,为筛选适宜库尔勒香梨矮化密植栽培的砧木提供理论基础。【方法】 采用Li-6400光合仪及FMS-2脉冲调制式荧光仪对4种不同矮化中间砧木库尔勒香梨叶片进行光合及荧光参数的测定,分析不同砧木的库尔勒香梨的光合特性和叶绿素荧光特性差异。【结果】 不同矮化中间砧木库尔勒香梨的Pn日变化均呈“双峰”曲线,都有明显的光合“午休”现象,光合“午休”现象是由非气孔限制因素导致;中矮1号的净光合速率(Pn)日均值、水分利用率(WUE)日均值均高于其他3个砧木的Pn日均值和WUE日均值;不同矮化中间砧木对库尔勒香梨的气孔导度(Gs)没有显著影响;中矮1号的实际光化学效率(ΦPSII)、非光化学淬灭系数(CNPQ)、PSII电子传递速率(ETR)的值为最高;不同矮化中间砧木对库尔勒香梨的光化学淬灭系数(CqP)、PSⅡ潜在光化学活性(Fv/Fo)值没有显著影响。【结论】 中矮1号作为库尔勒香梨的砧木优于其他2个矮化砧木和杜梨,可以作为库尔勒香梨的优良砧木。

关键词: 库尔勒香梨; 矮化砧木; 光合特性; 叶绿素荧光

Abstract: 【Objective】 To evaluate the effects of Zhongai-1, Zhongai-2, Zhongai-3 and Duli on photosynthetic and fluorescence characteristics of Korla fragrant pear in the hope of providing a theoretical basis for choosing suitable dwarfing interstocks to close planting cultivation of Korla fragrant pear.【Methods】 The photosynthesis and fluorescence parameters of four different dwarfing interstock Korla fragrant pear leaves were measured by using the Li-6400 photosynthesis apparatus and FMS-2 pulse modulation fluorescence instrument, and the differences were analyzed.【Results】 The daily changes of Pn of Korla fragrant pears with different dwarfing interstocks showed a double peak curve, and there was an obvious photosynthetic "noon break" phenomenon, which was caused by non-stomatal limiting factors; The daily mean values of Pn and WUE of Zhongai 1 were higher than those of the other three interstocks; Different dwarfing interstocks had no significant effect on the Gs of Korla fragrant pear; ΦPSⅡ, CNPQ, ETR , Fm, Fv/Fo values of Zhongai 1 were the highest; Different dwarfing interstocks had no significant effect on the Cqp, Fv/Fm values of Korla fragrant pears.【Conclusion】 From the perspective of photosynthesis and chlorophyll fluorescence characteristics, Zhongai 1 as the interstock of Korla fragrant pear is superior to the other two dwarfing interstocks and Duli, which can be considered as an excellent interstock of Korla fragrant pear.

Key words: Korla fragrant pear; dwarf rootstock; photosynthetic characteristics; chlorophyll fluorescence

中图分类号:

S661.2

阿布来克·尼牙孜, 章世奎, 樊国全, 王绍鹏, 王亚铜, 杜润清. 不同矮化中间砧木对库尔勒香梨光合特性的影响[J]. 新疆农业科学, 2020, 57(9): 1681-1688.

Abulaike Niyazi, ZHANG Shikui, FAN Guoquan, WANG Shaopeng, WANG Yatong, Du Runqing. Effects of Different Dwarf Interstocks on Photosynthetic Characteristics of Korla Fragrant Pear[J]. Xinjiang Agricultural Sciences, 2020, 57(9): 1681-1688.

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