| 扁桃与桃光合作用特征的比较研究 |
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| 引用本文： | 潘晓云,曹琴东,王根轩,杨晓燕.扁桃与桃光合作用特征的比较研究[J].园艺学报,2002,29(5):403-407. |
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| 作者姓名： | 潘晓云 曹琴东 王根轩 杨晓燕 |
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| 作者单位： | ( 兰州大学干旱农业生态国家重点实验室, 兰州730000; 甘肃省绿色食品办公室, 兰州730030; 甘肃省农业科学院粮食作物研究所, 兰州730070) |
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| 基金项目： | 国家自然科学基金项目 ( 90 10 2 0 15 ,30 170 16 1)，国家重点基础研究专项基金项目 (G19990 1170 5 ) |
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| 摘 要： | 在田间条件下对扁桃和桃的光合生理生态特点进行了比较研究。结果表明: (1) 扁桃和桃的叶片的净光合速率(Pn) 日变化均呈双峰曲线型, 峰值在11 时, 次峰值在15 时, 11～14 时有“午休”现象; 在10～15 时扁桃叶片的Pn 显著高于桃, 14 时差值最大。(2) 扁桃和桃的光合生理生态参数有显著差异: 光合作用的最适温度分别为27 ℃、23 ℃, 适宜温度范围分别为20～35 ℃、15～30 ℃; 光合作用的光补偿点和饱和点分别为54mol·m-2·s-1和1 714μmol··m-2·s-1、23μmol··m-2·s-1和1 479μmol·m-2·s-1; CO2补偿点和饱和点分别为68μL·L-1和838μL·L-1、55μL·L-1和717μL·L-1; 光合作用适宜空气湿度分别为≤0. 89 kPa、≤1. 31 kPa (相当于20 ℃下相对湿度38 %和56 %) 。(3) 叶绿素荧光参数的日变化显示: 扁桃叶片的Fv’/ Fm’、qP 和ΦPS Ⅱ均大于桃; 而扁桃叶片的qN 小于桃。说明在当地条件下, 扁桃叶片PS Ⅱ光化学效率、PS Ⅱ电子传递量子效率以及通过光化学猝灭转换光能的作用均显著高于桃; 而以非光化学猝灭方式耗散光能的作用小于桃。
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| 关 键 词： | 扁桃 桃 净光合速率 叶绿素荧光 环境因子 |
| 文章编号： | 0513-353X(2002)05-0403-05 |
| 修稿时间： | 2002年1月25日 |
Comparative Study on Photosynthetic Characteristics between Almond and Peach |
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| Pan Xiaoyun,Cao Qindong,Wang Genxuan,and Yang Xiaoyan.Comparative Study on Photosynthetic Characteristics between Almond and Peach[J].Acta Horticulturae Sinica,2002,29(5):403-407. |
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| Authors: | Pan Xiaoyun Cao Qindong Wang Genxuan and Yang Xiaoyan |
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| Institution: | ( State Key Laboratory of Arid Agroecology , Lanzhou University , Lanzhou 730000 , China ; Green Food Office of Gansu , Lanzhou 730030 , China ; Crop Research Institute , Gansu Academy of Agricultural Science , Lanzhou 730070 , China) |
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| Abstract: | The photosynthetic characteristics of introduced almond (Prunus amygdalus cv.‘Nonpareil’) were studied in comparison with peach (Prunus persica cv.‘Qingfeng’). The curves of diurnal variation of net photosynthesis rate (Pn) in leaves of almond and peach showed two peaks , occurring at 11∶00 and 15∶00 , respectively. Midday depressions of Pn (11∶00 - 14∶00) were found in leaves of both almond and peach. Pn of almond leaves was significantly higher than that of peach between 10∶00 - 15∶00. Some physioecological parameters showed significant differences between almond and peach. The optimum temperature for Pn in almond and peach is 27 ℃and 23 ℃, respectively. The light compensation and saturation point of Pn in almond and peach leaves were 54μmol·m-2·s-1 and 1714μmol·m-2·s-1, 23μmol·m-2·s-1 and 1479μmol·m-2·s-1, respectively. The CO2 compensationand saturation point of Pn in almond and peach leaves were 68 μL·L-1 and 838μL·L-1, 55μL·L-1 and 717μL·L-1, respectively. The optimum degree of humidity for Pn in almond and peach is ≤0. 89 kPa and ≤1. 31 kPa. And the results of diurnal variations of chlorophyll fluorescence showed that Fv’/ Fm’、qP and ΦPS Ⅱin leaves of almond were significant higher than those of peach , and qN was lower than that of peach. |
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| Keywords: | Almond Peach Net photosynthesis rate Chlorophyll fluorescence Environmental factors |
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