Simulation on the light-response curves of electron transport rate of Quercus variabilis and Robinia pseudoacacia leaves in the Xiaolangdi area, China

doi:10.17521/cjpe.2018.0063

Abstract

Abstract:

Aims The objectives are to compare the merits and demerits of rectangular hyperbola, nonrectangular hyperbola and the electron transport rate light-response Ye model, to investigate the difference of electron transport rate between the shaded and sunlit leaves, and to discuss the influence of bioenvironmental factors on the characteristic parameters of electron transport rate.
Methods The light-response (J-I) curves of electron transport rate were measured by the LI-6400XT fluorescence measurement system in Quercus variabilis and Robinia pseudoacacia plantations in north China. The rectangular hyperbola, nonrectangular hyperbola and the Ye model were used to simulate electron transport rate of the light-response curves.
Important findings The results showed that the determination coefficient of the J-I curves fitted by three models were more than 0.96. Compared with the rectangular hyperbola and nonrectangular hyperbola, the determination coefficient of the Ye model was the highest (> 0.99). The dynamic downregulation of photosystem II and the saturated light intensity (I_sat) cannot be simulated and obtained by the rectangular hyperbola model and the nonrectangular hyperbola model. The maximum electron transport rate (J_max) obtained by the rectangular hyperbola model was obviously higher than the measured one. The dynamic downregulation of photosystem II was well simulated by the Ye model. The J_max and I_sat values obtained by the Ye model were close to the measured ones. The J_max values of the shaded leaves of Quercus variabilis and Robinia pseudoacacia were 25.0% and 18.0% lower than the sunlit leaves, respectively. The I_satvalues of the sunlit leaves of Q. variabilis and R. pseudoacacia were 26.0% and 10.1% higher than those of the shaded leaves. J_max of Q. variabilis and R. pseudoacacia was correlated with temperature. I_sat of R. pseudoacacia was correlated with temperature, soil water content and net photosynthetic rate. The initial slope (α) values of the J-I curves for Q. variabilis and R. pseudoacacia had significant negative relationships with net photosynthetic rate.

Key words: Quercus variabilis, Robinia pseudoacacia, Ye model, shaded leaf, sunlit leaf, electron transport rate

LI Li-Yuan, LI Jun, TONG Xiao-Juan, MENG Ping, ZHANG Jin-Song, ZHANG Jing-Ru. Simulation on the light-response curves of electron transport rate of Quercus variabilis and Robinia pseudoacacia leaves in the Xiaolangdi area, China[J]. Chin J Plant Ecol, 2018, 42(10): 1009-1021.

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Figures/Tables 5

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树种 Species	月份 Month	模型 Model	α	I_sat (μmol·m^-2·s^-1)	J_max (μmol·m^-2·s^-1)	R²
栓皮栎 Quercus variabilis	6月 June	实测 Measured	-	1 000	65.51	-
		直角双曲线模型 Rectangular hyperbola model	0.46 ± 0.06	-	69.94 ± 5.85	0.963
		非直角双曲线模型 Nonrectangular hyperbola model	0.27 ± 0.03	-	64.41 ± 4.61	0.985
		叶子飘模型 Ye model	0.35 ± 0.03	1 042.28 ± 96.81	65.23 ± 6.45	0.999
	7月 July	实测 Measured	-	1200	84.11	-
		直角双曲线模型 Rectangular hyperbola model	0.54 ± 0.05	-	89.48 ± 2.60	0.971
		非直角双曲线模型 Nonrectangular hyperbola model	0.29 ± 0.04	-	79.41 ± 1.48	0.994
		叶子飘模型 Ye model	0.41 ± 0.04	1 072.50 ± 46.54	82.04 ± 2.18	0.996
	8月 August	实测 Measured	-	1 200	101.98	-
		直角双曲线模型 Rectangular hyperbola model	0.50 ± 0.02	-	117.96 ± 7.03	0.973
		非直角双曲线模型 Nonrectangular hyperbola model	0.34 ± 0.08	-	105.33 ± 2.62	0.995
		叶子飘模型 Ye model	0.38 ± 0.02	1 184.70 ± 38.30	103.60 ± 5.17	0.996
	9月 September	实测 Measured	-	1 000	47.55	-
		直角双曲线模型 Rectangular hyperbola model	0.57 ± 0.06	-	49.94 ± 2.81	0.968
		非直角双曲线模型 Nonrectangular hyperbola model	0.28 ± 0.02	-	47.02 ± 2.60	0.992
		叶子飘模型 Ye model	0.44 ± 0.03	990.56 ± 231.06	48.20 ± 1.19	0.994
刺槐 Robinia pseudoacacia	6月 June	实测 Measured	-	1 000	63.57	-
		直角双曲线模型 Rectangular hyperbola model	0.47 ± 0.03	-	68.74 ± 5.31	0.970
		非直角双曲线模型 Nonrectangular hyperbola model	0.25 ± 0.01	-	62.43 ± 4.79	0.987
		叶子飘模型 Ye model	0.36 ± 0.02	1 043.59 ± 60.56	63.67 ± 4.14	0.997
	7月 July	实测 Measured	-	1500	178.89	-
		直角双曲线模型 Rectangular hyperbola model	0.50 ± 0.01	-	234.74 ± 2.78	0.978
		非直角双曲线模型 Nonrectangular hyperbola model	0.30 ± 0.01	-	183.35 ± 1.76	0.998
		叶子飘模型 Ye model	0.37 ± 0.01	1 437.14 ± 24.26	182.83 ± 1.21	0.998
	8月 August	实测 Measured	-	1 300	127.78	-
		直角双曲线模型 Rectangular hyperbola model	0.46 ± 0.02	-	156.02 ± 8.13	0.976
		非直角双曲线模型 Nonrectangular hyperbola model	0.28 ± 0.02	-	129.45 ± 6.91	0.997
		叶子飘模型 Ye model	0.36 ± 0.02	1 349.56 ± 28.31	128.97 ± 6.53	0.997
	9月 September	实测 Measured	-	1 200	121.21	-
		直角双曲线模型 Rectangular hyperbola model	0.50 ± 0.02	-	142.64 ± 5.45	0.975
		非直角双曲线模型 Nonrectangular hyperbola model	0.30 ± 0.01	-	118.55 ± 5.08	0.995
		叶子飘模型 Ye model	0.38 ± 0.01	1 275.05 ± 24.58	121.47 ± 4.87	0.998

树种 Species	月份 Month	模型 Model	α	I_sat (μmol·m^-2·s^-1)	J_max (μmol·m^-2·s^-1)	R²
栓皮栎 Quercus variabilis	6月 June	实测 Measured	-	1 000	65.51	-
		直角双曲线模型 Rectangular hyperbola model	0.46 ± 0.06	-	69.94 ± 5.85	0.963
		非直角双曲线模型 Nonrectangular hyperbola model	0.27 ± 0.03	-	64.41 ± 4.61	0.985
		叶子飘模型 Ye model	0.35 ± 0.03	1 042.28 ± 96.81	65.23 ± 6.45	0.999
	7月 July	实测 Measured	-	1200	84.11	-
		直角双曲线模型 Rectangular hyperbola model	0.54 ± 0.05	-	89.48 ± 2.60	0.971
		非直角双曲线模型 Nonrectangular hyperbola model	0.29 ± 0.04	-	79.41 ± 1.48	0.994
		叶子飘模型 Ye model	0.41 ± 0.04	1 072.50 ± 46.54	82.04 ± 2.18	0.996
	8月 August	实测 Measured	-	1 200	101.98	-
		直角双曲线模型 Rectangular hyperbola model	0.50 ± 0.02	-	117.96 ± 7.03	0.973
		非直角双曲线模型 Nonrectangular hyperbola model	0.34 ± 0.08	-	105.33 ± 2.62	0.995
		叶子飘模型 Ye model	0.38 ± 0.02	1 184.70 ± 38.30	103.60 ± 5.17	0.996
	9月 September	实测 Measured	-	1 000	47.55	-
		直角双曲线模型 Rectangular hyperbola model	0.57 ± 0.06	-	49.94 ± 2.81	0.968
		非直角双曲线模型 Nonrectangular hyperbola model	0.28 ± 0.02	-	47.02 ± 2.60	0.992
		叶子飘模型 Ye model	0.44 ± 0.03	990.56 ± 231.06	48.20 ± 1.19	0.994
刺槐 Robinia pseudoacacia	6月 June	实测 Measured	-	1 000	63.57	-
		直角双曲线模型 Rectangular hyperbola model	0.47 ± 0.03	-	68.74 ± 5.31	0.970
		非直角双曲线模型 Nonrectangular hyperbola model	0.25 ± 0.01	-	62.43 ± 4.79	0.987
		叶子飘模型 Ye model	0.36 ± 0.02	1 043.59 ± 60.56	63.67 ± 4.14	0.997
	7月 July	实测 Measured	-	1500	178.89	-
		直角双曲线模型 Rectangular hyperbola model	0.50 ± 0.01	-	234.74 ± 2.78	0.978
		非直角双曲线模型 Nonrectangular hyperbola model	0.30 ± 0.01	-	183.35 ± 1.76	0.998
		叶子飘模型 Ye model	0.37 ± 0.01	1 437.14 ± 24.26	182.83 ± 1.21	0.998
	8月 August	实测 Measured	-	1 300	127.78	-
		直角双曲线模型 Rectangular hyperbola model	0.46 ± 0.02	-	156.02 ± 8.13	0.976
		非直角双曲线模型 Nonrectangular hyperbola model	0.28 ± 0.02	-	129.45 ± 6.91	0.997
		叶子飘模型 Ye model	0.36 ± 0.02	1 349.56 ± 28.31	128.97 ± 6.53	0.997
	9月 September	实测 Measured	-	1 200	121.21	-
		直角双曲线模型 Rectangular hyperbola model	0.50 ± 0.02	-	142.64 ± 5.45	0.975
		非直角双曲线模型 Nonrectangular hyperbola model	0.30 ± 0.01	-	118.55 ± 5.08	0.995
		叶子飘模型 Ye model	0.38 ± 0.01	1 275.05 ± 24.58	121.47 ± 4.87	0.998

树种 Species	月份 Month	叶位 Leaf position	拟合/实测 Fitted/measured	α	I_sat(μmol·m^-2·s^-1)	J_max(μmol·m^-2·s^-1)	R²
栓皮栎 Quercus variabilis	6月 June	阴生叶 Shaded leaf	拟合 Fitted	0.39 ± 0.07	1 019.31 ± 55.64	55.17 ± 7.31	0.993
			实测 Measured	-	1 000	55.49	-
		阳生叶 Sunlit leaf	拟合 Fitted	0.32 ± 0.01	1 075.41 ± 139.41	75.66 ± 7.80	0.997
			实测 Measured	-	1 000	75.53	-
	7月 July	阴生叶 Shaded leaf	拟合 Fitted	0.44 ± 0.03	981.87 ± 179.95	69.97 ± 7.69	0.994
			实测 Measured	-	1 000	68.65	-
		阳生叶 Sunlit leaf	拟合 Fitted	0.41 ± 0.07	1 172.54 ± 172.76	95.22 ± 4.41	0.996
			实测 Measured	-	1 500	94.99	-
	8月 August	阴生叶 Shaded leaf	拟合 Fitted	0.40 ± 0.04	1 092.35 ± 97.59	86.36 ± 7.47	0.996
			实测 Measured	-	1 000	85.40	-
		阳生叶 Sunlit leaf	拟合 Fitted	0.38 ± 0.02	1 246.39 ± 9.25	121.32 ± 5.96	0.997
			实测 Measured	-	1 200	120.60	-
	9月 September	阴生叶 Shaded leaf	拟合 Fitted	0.48 ± 0.08	736.50 ± 86.71	44.07 ± 0.08	0.995
			实测 Measured	-	1 000	43.59	-
		阳生叶 Sunlit leaf	拟合 Fitted	0.42 ± 0.06	1 141.58 ± 119.35	53.75 ± 4.93	0.991
			实测 Measured	-	1 800	53.54	-
刺槐 Robinia pseudoacacia	6月 June	阴生叶 Shaded leaf	拟合 Fitted	0.37 ± 0.02	1 045.23 ± 74.27	57.01 ± 6.10	0.993
			实测 Measured	-	1 000	57.47	-
		阳生叶 Sunlit leaf	拟合 Fitted	0.37 ± 0.02	1 047.57 ± 76.42	70.38 ± 4.50	0.997
			实测 Measured	-	1 000	69.67	-
	7月 July	阴生叶 Shaded leaf	拟合 Fitted	0.38 ± 0.01	1 265.91 ± 33.74	168.49 ± 5.99	0.997
			实测 Measured	-	1 000	166.75	-
		阳生叶 Sunlit leaf	拟合 Fitted	0.36 ± 0.02	1 654.66 ± 48.58	200.67 ± 8.92	0.999
			实测 Measured	-	1 800	199.69	-
	8月 August	阴生叶 Shaded leaf	拟合 Fitted	0.36 ± 0.02	1 316.81 ± 39.36	112.22 ± 7.87	0.997
			实测 Measured	-	1 200	111.20	-
		阳生叶 Sunlit leaf	拟合 Fitted	0.37 ± 0.02	1 372.99 ± 25.97	145.84 ± 9.12	0.996
			实测 Measured	-	1 800	144.59	-
	9月 September	阴生叶 Shaded leaf	拟合 Fitted	0.40 ± 0.01	1 240.05 ± 50.69	112.46 ± 5.47	0.995
			实测 Measured	-	1 000	111.86	-
		阳生叶 Sunlit leaf	拟合 Fitted	0.37 ± 0.01	1 303.29 ± 46.66	130.79 ± 5.67	0.998
			实测 Measured	-	1 200	133.03	-

树种 Species	月份 Month	叶位 Leaf position	拟合/实测 Fitted/measured	α	I_sat(μmol·m^-2·s^-1)	J_max(μmol·m^-2·s^-1)	R²
栓皮栎 Quercus variabilis	6月 June	阴生叶 Shaded leaf	拟合 Fitted	0.39 ± 0.07	1 019.31 ± 55.64	55.17 ± 7.31	0.993
			实测 Measured	-	1 000	55.49	-
		阳生叶 Sunlit leaf	拟合 Fitted	0.32 ± 0.01	1 075.41 ± 139.41	75.66 ± 7.80	0.997
			实测 Measured	-	1 000	75.53	-
	7月 July	阴生叶 Shaded leaf	拟合 Fitted	0.44 ± 0.03	981.87 ± 179.95	69.97 ± 7.69	0.994
			实测 Measured	-	1 000	68.65	-
		阳生叶 Sunlit leaf	拟合 Fitted	0.41 ± 0.07	1 172.54 ± 172.76	95.22 ± 4.41	0.996
			实测 Measured	-	1 500	94.99	-
	8月 August	阴生叶 Shaded leaf	拟合 Fitted	0.40 ± 0.04	1 092.35 ± 97.59	86.36 ± 7.47	0.996
			实测 Measured	-	1 000	85.40	-
		阳生叶 Sunlit leaf	拟合 Fitted	0.38 ± 0.02	1 246.39 ± 9.25	121.32 ± 5.96	0.997
			实测 Measured	-	1 200	120.60	-
	9月 September	阴生叶 Shaded leaf	拟合 Fitted	0.48 ± 0.08	736.50 ± 86.71	44.07 ± 0.08	0.995
			实测 Measured	-	1 000	43.59	-
		阳生叶 Sunlit leaf	拟合 Fitted	0.42 ± 0.06	1 141.58 ± 119.35	53.75 ± 4.93	0.991
			实测 Measured	-	1 800	53.54	-
刺槐 Robinia pseudoacacia	6月 June	阴生叶 Shaded leaf	拟合 Fitted	0.37 ± 0.02	1 045.23 ± 74.27	57.01 ± 6.10	0.993
			实测 Measured	-	1 000	57.47	-
		阳生叶 Sunlit leaf	拟合 Fitted	0.37 ± 0.02	1 047.57 ± 76.42	70.38 ± 4.50	0.997
			实测 Measured	-	1 000	69.67	-
	7月 July	阴生叶 Shaded leaf	拟合 Fitted	0.38 ± 0.01	1 265.91 ± 33.74	168.49 ± 5.99	0.997
			实测 Measured	-	1 000	166.75	-
		阳生叶 Sunlit leaf	拟合 Fitted	0.36 ± 0.02	1 654.66 ± 48.58	200.67 ± 8.92	0.999
			实测 Measured	-	1 800	199.69	-
	8月 August	阴生叶 Shaded leaf	拟合 Fitted	0.36 ± 0.02	1 316.81 ± 39.36	112.22 ± 7.87	0.997
			实测 Measured	-	1 200	111.20	-
		阳生叶 Sunlit leaf	拟合 Fitted	0.37 ± 0.02	1 372.99 ± 25.97	145.84 ± 9.12	0.996
			实测 Measured	-	1 800	144.59	-
	9月 September	阴生叶 Shaded leaf	拟合 Fitted	0.40 ± 0.01	1 240.05 ± 50.69	112.46 ± 5.47	0.995
			实测 Measured	-	1 000	111.86	-
		阳生叶 Sunlit leaf	拟合 Fitted	0.37 ± 0.01	1 303.29 ± 46.66	130.79 ± 5.67	0.998
			实测 Measured	-	1 200	133.03	-

	栓皮栎 Quercus variabilis			刺槐 Robinia pseudoacacia
	α	I_sat	J_max	α	I_sat	J_max
T_a	-0.571	0.480	0.902^**	-0.477	0.801^*	0.806^*
SWC	-0.364	0.856	0.953^*	-0.344	0.965^*	0.912
P_n	-0.800^*	0.542	0.745^*	-0.719^*	0.764^*	0.661
Chl	-0.293	0.873	0.961^*	-0.435	0.933	0.871