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作物杂志,2017, 第4期: 96–104 doi: 10.16035/j.issn.1001-7283.2017.04.017

• 生理生化·植物营养·栽培耕作 • 上一篇    下一篇

青稞光合作用5种光响应模型的比较分析

侯维海,王建林,旦巴,胡单   

  1. 西藏农牧学院植物科学学院/高原作物分子育种实验室,860000,西藏林芝
  • 收稿日期:2017-04-13 修回日期:2017-06-27 出版日期:2017-08-15 发布日期:2018-08-26
  • 通讯作者: 王建林
  • 作者简介:侯维海,硕士研究生,从事作物遗传育种研究
  • 基金资助:
    国家自然科学基金(31560362);西藏特色农牧资源研发协同创新中心-作物研究方向(XZXTCX-2015-03);西藏特色农牧资源研发协同创新中心-作物研究方向(XBTSZWXK-2015-01)

Comparison of Photosynthesis-Light Response Curve Fitting Model of Hulless Barley

Hou Weihai,Wang Jianlin, ,Hu Dan   

  1. Institute of Plant Sciences/Plateau Crop Molecular Breeding Laboratory,Xizang Agiriculture and Animal Husbandry College,Linzhi 860000,Tibet,China
  • Received:2017-04-13 Revised:2017-06-27 Online:2017-08-15 Published:2018-08-26
  • Contact: Jianlin Wang

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摘要：

以西藏主栽春青稞品种喜马拉雅22为试验材料,于开花期,利用LI-6400XT光合仪分别测定了倒1叶、倒2叶、倒3叶的光合光响应曲线,应用直角双曲线模型(RH)、非直角双曲线模型(NRH)、直角双曲线修正模型(MRH)、指数模型(EM)、修正指数模型(MEM)拟合青稞不同叶位的光响应曲线,比较和分析各模型的拟合参数。结果表明:模型RH、NRH拟合的青稞倒1、倒2、倒3叶最大净光合速率(Pnmax)均高于实测值,而模型EM拟合值均小于实测值;模型RH、NRH拟合的青稞倒1、倒2、倒3叶光饱和点(Is)远小于实测值,而模型EM拟合值略小于实测值;模型MRH拟合的Pnmax、Is均与青稞不同叶位叶片实测值接近。模型MEM由于光抑制项为负值,导致Pnmax和Is无法计算。在高光合有效辐射条件下[PAR>1 200μmol photons/(m 2·s)],只有MRH拟合的青稞倒1、倒2、倒3叶光合光响应曲线与实测光响应曲线最为接近,且拟合优度最佳。5种模型的拟合效果为MRH>MEM>EM>RH、NRH。

关键词: 青稞, 光响应模型, 净光合速率, 光响应曲线

Abstract:

Astract The mostly planted hulless barley species “Himalaya 22” in Tibet was used as the test material, and LI-6400XT photosynthetic apparatus was used to measure the photosynthetic light response curves of barley leaves in the 1st, 2nd and 3rd leaf at the flowering stage, and the rectangle hyperbola curve model (RH), modified rectangle hyperbolic curve model (MRH), exponential model (EM) and modified exponential model (MEM) were used to portray the light response curves of barley leaves at different positions. The fitting parameters of each model were compared and analyzed. The results showed that the maximum net photosynthetic rate (Pnmax) of barley leaves in the 1st, 2nd and 3rd leaf fitted by RH and NRH model was higher than the measured values, while the EM model fitting values were less than the measured value. The light saturation points (Is) of barley leaves in the 1st, 2nd and 3rd leaf fitted by RH and NRH were far less than the measured values, while the EM model fitting values were slightly less than the measured value; the Pnmax and Is of MRH were close to the measured values of the highland barley leaves at different position. Due to light suppression, the phase of the MRH model was negative, leading to that the Pnmax and Is could not be calculated. Under the condition of strong photosynthetically active radiation light (PAR>1 200μmol photon/m2·s), only the photosynthetic light response curve of barley leaves in the 1st, 2nd and 3rd leaf fitted by the model MRH was the closest to the measured photosynthetic curve with the best goodness of fit. The model fittng ranking was as follow: MRH model> MEM model> EM> RH, NRH model, therefore, the model MRH was the best fitting model of hulless barley.

Key words: Hulless barley, Light response model, Net photosynthetic rate, Light response curve

表1

青稞不同叶位光响应模型的参数估计值和拟合优度值"

光响应模型
Light response model		 器官Organ α AQE Pnmax
[μmol CO2/
(m2·s)]		 Is
[μmol CO2/(m2·s)]		 Ic
[μmol CO2/(m2·s)]		 Rd
[μmol CO2/(m2·s)]		 β λ γ ξ k
Pnmax实测值 倒1叶 - - ≈17.16 1 200~1 600 ≈17.40 - - - - - -
Pnmaxmeasured value 倒2叶 - - ≈14.30 1 200~1 600 ≈15.20 - - - - - -
倒3叶 - - ≈10.22 1 600~2 000 ≈12.00 - - - - - -
RH 倒1叶 0.101 0.05 20.59 428.12 8.43 0.818 - - - - -
倒2叶 0.100 0.05 17.17 414.93 16.42 1.499 - - - - -
倒3叶 0.062 0.03 11.87 419.37 12.18 0.710 - - - - -
NRH 倒1叶 0.067 0.05 18.70 395.12 16.04 1.053 - - - - 0.654
倒2叶 0.063 0.05 15.62 368.42 16.29 0.963 - - - - 0.678
倒3叶 0.056 0.03 11.65 392.20 11.87 0.635 - - - - 0.187
MRH 倒1叶 0.083 - 18.31 1 609.37 15.82 1.250 0.000091 - 0.003 - -
倒2叶 0.074 - 15.36 1 320.69 16.39 1.035 0.000127 - 0.003 - -
倒3叶 0.054 - 10.95 2 022.56 10.99 0.568 0.000049 - 0.004 - -
EM 倒1叶 0.063 - 16.35 1 209.00 14.10 - - - - - -
倒2叶 0.059 - 13.72 1 085.00 13.80 - - - - - -
倒3叶 0.037 - 9.79 1 223.09 4.46 - - - - - -
MEM 倒1叶 - 0.07 - - 15.46 1.008 -0.000027 15.705 16.713 0.004 -
倒2叶 - 0.06 13.73 1 229.40 12.66 0.740 0.000032 14.400 15.142 0.004 -
倒3叶 - 0.04 - - 8.98 5.000 -0.000058 8.915 9.246 0.004 -

图1

青稞倒1叶、倒2叶、倒3叶光响应曲线模型拟合值比较分析"

图2

高光照条件下,青稞倒1叶、倒2叶、倒3叶光响应曲线模型拟合值和测量值比较分析"

表2

青稞不同叶位光响应模型的拟合优度"

光响应模型
Light response model		 器官
Organ		 拟合优度Goodness of fit
AIC Ra2 RMSE MAPE R2
RH 倒1叶 -11.34 0.990 0.671 12.740 0.991
倒2叶 -9.14 0.983 0.722 10.582 0.985
倒3叶 -41.01 0.994 0.283 3.380 0.995
NRH 倒1叶 -18.55 0.992 0.551 6.650 0.994
倒2叶 -13.76 0.986 0.646 9.552 0.989
倒3叶 -41.47 0.995 0.291 3.013 0.996
MRH 倒1叶 -19.92 0.994 0.526 8.767 0.995
倒2叶 -22.62 0.992 0.481 8.034 0.994
倒3叶 -45.82 0.996 0.254 3.404 0.997
EM 倒1叶 -17.43 0.993 0.547 6.418 0.994
倒2叶 -14.33 0.988 0.588 9.468 0.990
倒3叶 -30.46 0.990 0.363 6.559 0.991
MEM 倒1叶 -18.03 0.992 0.560 6.537 0.994
倒2叶 -15.80 0.987 0.603 9.505 0.990
倒3叶 -33.06 0.990 0.379 6.558 0.992
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