Quantifying light response of photosynthesis: addressing the long-standing limitations of non-rectangular hyperbolic model
文献类型： 外文期刊
作者： Ye, Z. P. 1 ; Duan, S. H. 2 ; Chen, X. M. 3 ; Duan, H. L. 4 ; Gao, C. P. 5 ; Kang, H. J. 6 ; An, T. 1 ; Zhou, S. X. 8 ;
作者机构： 1.Jinggangshan Univ, Maths & Phys Coll, Jian 343009, Jiangxi, Peoples R China
2.Jinggangshan Univ, Sch Life Sci, Jian 343009, Jiangxi, Peoples R China
3.Jiangxi Acad Agr Sci, Soil Fertilizer & Environm Resources Inst, Nanchang 330200, Jiangxi, Peoples R China
4.Nanchang Inst Technol, Jiangxi Prov Key Lab Restorat Degraded Ecosyst &, Nanchang 330099, Jiangxi, Peoples R China
5.Inner Mongolia Agr Univ, Coll Grassland Resources & Environm, Key Lab Grassland Resources,Minist Educ,Inner Mon, Minist Agr & Rural Affairs,Key Lab Forage Cultiva, Hohhot 010011, Peoples R China
6.Wenzhou Acad Agr Sci, Wenzhou 325006, Peoples R China
7.Southern Zhejiang Key Lab Crop Breeding, Wenzhou 325001, Peoples R China
8.New Zealand Inst Plant & Food Res Ltd, Hawkes Bay 4130, New Zealand
关键词： light-response curve; maximum net photosynthetic rate; model; photoinhibition; photosynthesis; saturation light intensity
期刊名称：PHOTOSYNTHETICA （ 影响因子：2.562； 五年影响因子：2.838 ）
ISSN： 0300-3604
年卷期： 2021 年 59 卷 1 期
页码：
收录情况： SCI
摘要： Light intensity (I) fluctuates rapidly and is the most important environmental factor affecting photosynthesis. Accurate characterization of light-response curve of leaf-scale photosynthesis (P-N-I curve) is fundamental for understanding P-N-I relations at the whole-plant and ecosystem scales. A robust P-N-I model should be accurate in reproducing P-N-I curves over light-limited, light-saturated, and photoinhibitory I levels, and ideally returning key quantitative traits defining the curves, including initial slope of increase (alpha), dark respiration rate (R-D), the maximum net photosynthetic rate (P-Nmax), and the corresponding saturation intensity (I-sat). We need to improve a model reproduction of (1) P-N-I responses over low I levels and (2) the widely reported decline of P-N at photoinhibitory I levels. Our observation-modelling comparison, shown by the widely used non-rectangular hyperbolic model, led to (1) underestimation of RD, (2) overestimation of P-Nmax, and (3) failure in reproducing the photoinhibitory response when I surpassed the cultivar-specific I-sat. In contrast, our model addressed the above limitations extremely well. The results highlighted the accuracy and robustness of our model, especially in (1) returning key traits defining the curve and (2) reproducing the curve over both low [i.e., 0-50 mu mol(photon) m(-2) s(-1)] and photoinhibitory I levels (i.e., beyond I-sat).
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