光合作用光响应模型的比较

doi:10.3773/j.issn.1005-264x.2008.06.016

摘要/Abstract

摘要：

用美国Li-Cor公司生产的Li-6400光合作用测定仪控制CO₂浓度和温度, 测量了华北平原冬小麦(Triticum aestivum)的光响应数据。分别用C₃植物光响应新模型、直角双曲线模型、非直角双曲线模型和Prado-Moraes模型拟合这些实测数据, 分析了由直角双曲线模型、非直角双曲线模型和Prado-Moraes模型拟合这些数据得到的最大净光合速率(The maximum net photosynthetic rate)远大于实测值, 而光饱和点(Light saturation point)远小于实测值的原因。结果表明, 由C₃植物光响应新模型拟合的结果与实测数据符合程度最高(R²=0.999 4和R²=0.998 7); 表观量子效率(Apparent quantum yield)不是一个理想的表示植物利用光能的指标, 建议用植物光响应曲线在光补偿点处的量子效率作为表示植物光能利用的指标。

关键词: 光响应新模型, 冬小麦, 最大净光合速率, 光饱和点, 表观量子效率

Abstract:

Aims Our objective is to compare a new photosynthetic light-response model with the non-rectangular hyperbola, rectangular hyperbola, and Prado-Moraes model in fitting data and obtaining the maximum net photosynthetic rate and the light saturation point.

Methods We measured the light-response of photosynthetic rate of winter wheat (Triticum aestivum) under the same chamber CO₂ concentration and different air temperatures in North China Plain using a gas analyzer Li-6400. The measured data were simulated by the new photosynthetic light-response model and the non-rectangular hyperbola, rectangular hyperbola and Prado-Moraes models, respectively.

Important findings The new photosynthetic light-response model shows advantage over the non-rectangular hyperbola, rectangular hyperbola, and Prado-Moraes models in fitting data on the maximum net photosynthetic rate and the light saturation point. The main photosynthetic parameters calculated by the new one were very close to the measured data (R²=0.999 4 and R²=0.998 7). Results showed that the apparent quantum was not an ideal indicator to assess the light use efficiency of plants. We suggest the apparent quantum yield be replaced by the quantum yield at the light compensation point due to the unity of the quantum yield for any C₃plantspecies under certain environmental conditions.

Key words: new photosynthetic light-response model, winter wheat (Triticum aestivum), the maximum net photosynthetic rate, light saturation point, apparent quantum yield

叶子飘, 于强. 光合作用光响应模型的比较. 植物生态学报, 2008, 32(6): 1356-1361. DOI: 10.3773/j.issn.1005-264x.2008.06.016

YE Zi-Piao, YU Qiang. COMPARISON OF NEW AND SEVERAL CLASSICAL MODELS OF PHOTOSYNTHESIS IN RESPONSE TO IRRADIANCE. Chinese Journal of Plant Ecology, 2008, 32(6): 1356-1361. DOI: 10.3773/j.issn.1005-264x.2008.06.016

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链接本文: https://www.plant-ecology.com/CN/10.3773/j.issn.1005-264x.2008.06.016

https://www.plant-ecology.com/CN/Y2008/V32/I6/1356

图/表 4

图1 不同气温条件下冬小麦的光响应曲线 Pn: 净光合速率 Net photosynthetic rate PAR: Photosynthetically active radiation Ta: 气温 Air temperature Ca: 气室的CO2浓度 Chamber CO2 concentration φ c: 在光补偿点的量子效率 Quantum yield at light compensation point Pmax: 最大净光合速率 Maximum net photosynthetic rate Isat: 光饱和点 Light saturation point Ic: 光补偿点 Light compensation point Rd: 暗呼吸速率 Dark respiration rate R2: 决定系数 Determination coefficient

Fig. 1 Light response curve of winter wheat (Triticum aestivum) under different temperatures

表1 4个光响应模型拟合冬小麦在20℃和360 μmol·mol-1 CO2时光响应数据所得结果与实测数据的比较

Table 1 Comparison of the measured data of winter wheat (Triticum aestivum) with the results fitted by four models at 20℃ and 360 μmol·mol-1 CO2 concentration

光合参数 Photosynthetic parameters	非直角双曲线模型 Nonrectangular hyperbola model	直角双曲线模型 Rectangular hyperbola model	P-M模型 Prado-Moraes model	C₃植物光响应模型 New photosynthetic model for C₃ species	测量值 Measured data
最大净光合速率 Maximum net photosynthetic rate (P_max, μmol CO ₂·m^-2·s^-1)	51.56	31.27	24.32	22.85	≈23
初始斜率 Initial slope (α)	0.103	0.084	0.060	0.067	-
光补偿点 Light compensation point (I_c, μmol·m ^-2·s^-1)	11.81	30.60	5.52	28.47	≈29
光饱和点 Light saturation point (I_sat, μmol·m ^-2·s^-1)	≈1 220	≈750	1 243.08	1 910.56	≈1 900
暗呼吸速率 Dark respiration rate (R_d, μmol CO ₂·m^-2·s^-1)	-1.21	-2.57	-1.243	-1.81	-1.8
决定系数 Determination coefficient (R²)	-	0.997 0	0.999 1	0.999 4	-

图2 冬小麦的光响应曲线(左)和在低光强时的光合响应曲线(右) Pn、PAR: 见图1 See Fig. 1

Fig. 2 Light-response curve of photosynthesis (left) and photosynthetic response to irradiance at lower levels of light intensity (right) for winter wheat

表2 不同拟合有效光合辐射区间的表观量子效率、光补偿点和暗呼吸速率

Table 2 Apparent quantum yield, light compensation point and dark respiration rate under different fitted scopes of PAR

光合有效辐射 Photosynthetically active radiation (PAR, μmol·m ^-2·s^-1)	≤200 μmol·m^-2·s^-1	≤180 μmol·m^-2·s^-1	≤160 μmol·m^-2·s^-1	≤140 μmol·m^-2·s^-1	≤120 μmol·m^-2·s^-1
表观量子效率 Apparent quantum yield (AQY)	0.049	0.050	0.052	0.054	0.055
光补偿点 Light compensation point ( I_c, μmol·m ^-2·s^-1)	28.16	28.80	29.23	30.00	30.18
暗呼吸速率 Dark respiration rate (R_d, μmol·m ^-2·s^-1)	-1.38	-1.44	-1.52	-1.62	-1.66

参考文献 26

[1]	Chen GY (陈根云), Yu GL (俞冠路), Chen Y (陈悦), Xu DQ (许大全) (2006). Exploring the observation methods of photosynthetic responses to light and carbon dioxide. Journal of Plant Physiology and Molecular Biology (植物生理与分子生物学学报), 32,691-696. (in Chinese with English abstract)
[2]	Eilers PHC, Peeters JCH (1988). A model for the relationship between light intensity and the rate of photosynthesis in phytoplankton. Ecological Modelling, 42,199-215.
[3]	Evans JG, Jakonbsen I, Ögren E (1993). Photosynthetic light-response curves. 2. Gradients of light absorption and photosynthetic capacity. Planta, 189,191-200.
[4]	Falkowski PG, Wirick CD (1981). A simulation model of the effects of vertical mixing on primary productivity. Marine Biology, 65,69-75.
[5]	Farquhar GD, Caemmerers S, Berry JA (1980). A biochemical model of photosynthetic CO ₂ assimilation in leaves of C ₃ species. Planta, 149,78-90. DOI URL PMID
[6]	Fasham MJR, Platt T (1983). Photosynthesis response of phytoplankton to light: a physiological model. Proceedings of the Royal Society of London, Series B: Biological Sciences, 219,355-370.
[7]	Gao J (高峻), Meng P (孟平), Wu B (吴斌), Zhang JS (张劲松), Chu JM (禇健民) (2006). Photosynthesis and transpiration of Salvia miltiorrhiza in tree-herb system of Prunus dulcis and Salvia miltiorrhiza. Journal of Beijing Forestry University (北京林业大学学报), 28(2),64-67. ( in Chinese with English abstract).
[8]	Jassby AD, Platt T (1976). Mathematical formulation of the relationship between photosynthesis and light for phytoplankton. Limnology and Oceanography, 21,540-547.
[9]	Hand DW, Warren WJW, Acock B (1993). Effects of light and CO ₂ on net photosynthetic rates of stands of aubergine and Amaranthus. Annals of Botany, 71,209-216.
[10]	Kyei-Boahen S, Lada R, Astatkie T, Gordon R, Caldwell C (2003). Photosynthetic response of carrots to varying irradiances. Photosynthetica, 41,1-5.
[11]	Leakey ADB, Uribelarrea M, Ainsworth EA, Naidu SL, Rogers A, Ort DR, Long SP (2006). Photosynthesis, productivity, and yield of maize are not affected by open-air elevation of CO ₂ concentration in the absence of drought. Plant Physiology, 140,779-790. DOI URL PMID
[12]	Marshall B, Biscoe PV (1980). A model for C ₃ leaves describing the dependence of net photosynthesis on irradiance. Journal of Experimental Botany, 31,29-39.
[13]	Megard ROD, Tonkyn W, Senft WH (1984). Kinetics of oxygenic photosynthesis in planktonic algae. Journal of Plankton Research, 6,325-337.
[14]	Olsson T, Leverenz JW (1994). Non-uniform stomata closure and the apparent convexity of the photosynthetic photon flux density response curve. Plant,Cell & Environment, 17,701-710.
[15]	Prado CHBA, Moraes JAPV (1997). Photosynthetic capacity and specific leaf mass in twenty woody species of Cerrado vegetation under field condition. Photosynthetica, 33,103-112.
[16]	Richardson A, Berlyn G (2002). Changes in foliar spectral reflectance and chlorophyll fluorescence of four temperate species following branch cutting. Tree Physiology, 22,499-506. DOI URL PMID
[17]	Robert ES, Mark A, John SB (1984). Kok effect and the quantum yield of photosynthesis. Plant Physiology, 75,95-101. URL PMID
[18]	Rubio FC, Camacho FG, Sevilla JMF, Chisti Y, Grima EM (2003). A mechanistic model of photosynthesis in microalgae. Biotechnology and Bioengineering, 81,459-473. DOI URL PMID
[19]	Thornley JHM (1976). Mathematical Models in Plant Physiology. Academic Press, London, 86-110.
[20]	Walker DA (1989). Automated measurement of leaf photosynthetic O ₂ evolution as a function of photon flux density. Philosophical Transactions of the Royal Society London B, 323,313-326.
[21]	Webb WL, Newton M, Starr D (1974). Carbon dioxide exchange of Alnus rubra: a mathematical model. Oecologica, 17,281-291.
[22]	Ye ZP (叶子飘) (2007). Application of light-response model in estimating the photosynthesis of super-hybrid rice combinationⅡ—Youming 86. Chinese Journal of Ecology(生态学杂志), 26,1323-1326. (in Chinese with English abstract)
[23]	Ye ZP (2007). A new model for relationship between light intensity and the rate of photosynthesis in Oryza sativa. Photosynthetica, 45,637-640.
[24]	Yu Q, Zhang YQ, Liu YF, Shi PL (2004). Simulation of the stomatal conductance of winter wheat in response to light, temperature and CO ₂ changes. Annals of Botany, 93,435-441. DOI URL PMID
[25]	Zeng XM (曾小美), Yuan L (袁琳), Shen YG (沈允刚) (2002). Response of photosynthesis to light intensity in intact and detached leaves of Arabidopsis thaliana. Plant Physiology Communications(植物生理学通讯), 38,25-26. (in Chinese with English abstract)
[26]	Zonneveld C (1998). Photoinhibition as affected by photoacclimation in phytoplankton: a model approach. Journal of Theoretical Biology, 193,115-123.

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