文献类型： 外文期刊

作者： Ye, Zi-Piao ¹ ; Liu, Yu-Guo ² ; Kang, Hua-Jing ³ ; Duan, Hong-Lang ⁴ ; Chen, Xian-Mao ⁵ ; Zhou, Shuang-Xi ⁶ ;

作者机构： 1.Jinggangshan Univ, Maths & Phys Coll, Jian 343009, Jiangxi, Peoples R China

2.Chinese Acad Forestry, Inst Desertificat Studies, Beijing 100091, Peoples R China

3.Wenzhou Vocat Coll Sci & Technol, Wenzhou 325006, Zhejiang, Peoples R China

4.Nanchang Inst Technol, Jiangxi Prov Key Lab Restorat Degraded Ecosyst &, Nanchang 330099, Jiangxi, Peoples R China

5.Jiangxi Acad Agr Sci, Soil Fertilizer & Environm Resources Inst, Nanchang 330200, Jiangxi, Peoples R China

6.New Zealand Inst Plant & Food Res Ltd, Hawkes Bay 4130, New Zealand

关键词： Electron flow; Light response; Photoprotection; Photorespiration; Photosynthesis; Saturation light intensity

期刊名称：JOURNAL OF PLANT PHYSIOLOGY （ 影响因子：3.549； 五年影响因子：4.164 ）

ISSN： 0176-1617

年卷期： 2019 年 240 卷

页码：

收录情况： SCI

摘要： Suppression of photorespiration by low O-2 concentrations (Method 1) and simultaneous measurements of gas exchange and chlorophyll fluorescence (Method 2) are often used to estimate leaf photorespiration rate (R-p) of C-3 plants. However, it is largely unknown whether Method 1 and Method 2 can be used equivalently in estimating R-p. Using a field experiment on two wheat cultivars (T. aestivum JM22 and T. aestivum Z39-118) whose leaf gas exchange and chlorophyll fluorescence at low and normal O-2 concentrations (2% versus 21% O-2) were simultaneously measured across a wide range of light intensities (I), this study assessed the impacts of the two measures on R-p and its response under changing irradiance conditions. All the above quantities increased with the increasing I until reaching the cultivar-specific maximum values and the corresponding saturation light intensities. However, there were significant differences between R-p estimated by Method 1 and Method 2 at the I range from 150 to 2000 mu mol m(-2) S-1 for T. aestivum JM22 and from 150 to 1000 mu mol m(-2) S-1 for T. aestivum Z39-118. These findings demonstrated that the two methods cannot be used equivalently under changing irradiance conditions.