Simulation of Light Response Curve of Spring Wheat in Semi-arid Rainfed Area Under Drought Stress

doi:10.11924/j.issn.1000-6850.casb20190800546

Abstract

Abstract:

To reveal the adaptability of drought stress in semi-arid rainfed areas to spring wheat light response model, through the analysis and comparison of four kinds of light response curve models, the applicability of drought stress to the spring wheat light response model was discussed. The results showed that continuous drought stress significantly reduced the net photosynthetic rate of spring wheat leaves, and the rehydration in the late stage of reproductive growth caused the over-compensation effect of T1 and T2 treatment. The fitting results of the light response parameters under each model showed that the maximum net photosynthetic rate had the best simulation effect in the exponential model, the light compensation point had the best fitting effect in the right angle hyperbolic correction model, and the dark breathing rate had the best fitting effect in the exponential model. The right angle hyperbolic correction model in the four models had the best simulation results. In summary, drought stress significantly reduced the photosynthetic capacity of spring wheat leaves and decreased the photosynthetic activity of wheat mesophyll cells, however, the hydration in the late stage of stress caused the photosynthetic capacity of T₁ and T₂treated wheat leaves to recover, and the overcompensation effect appeared.

Key words: spring wheat, light response curve, light response model, drought stress, semi-arid rainfed area

CLC Number:

Yang Yang, Ma Yihao, Wang Runyuan, Qi Yue, Zhang Kai. Simulation of Light Response Curve of Spring Wheat in Semi-arid Rainfed Area Under Drought Stress[J]. Chinese Agricultural Science Bulletin, 2020, 36(29): 15-24.

Figures/Tables 5

References 35

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光响应模型	处理	初始量子效率	最大净光合速	光饱和点	光补偿点	暗呼吸速率
实测值	CK	—	≈13.82	≈1900	≈27	≈1.34
	T1	—	≈16.92	≈2100	≈19	≈0.95
	T2	—	≈18.00	≈2100	≈20	≈1.01
	T3	—	≈5.93	≈1500	≈31	≈1.11
直角双曲线模型	CK	0.0466	17.3251	647.27	25.3003	1.103
	T1	0.0581	21.8965	636.84	21.4302	1.1772
	T2	0.0659	22.9871	667.6	21.2007	1.317
	T3	0.0689	10	487.39	57.0902	2.8217
非直角双曲线模型	CK	0.0465	17.3239	674.187	25.278	1.1017
	T1	0.0452	20.0765	582.635	18.7252	0.8289
	T2	0.053	21.397	619.96	19.4075	1.0015
	T3	0.0301	7.3137	472.76	33.7707	0.9415
指数模型	CK	0.0305	13.2997	1011.53	35.4721	1.0392
	T1	0.0402	16.8747	960.71	26.5826	1.0366
	T2	0.0449	17.794	912.08	23.8026	1.0384
	T3	0.0227	5.7391	612.24	55.9197	1.1377
直角双曲线修正模型	CK	0.0466	16.2217	2143.4297	25.2988	1.1029
	T1	0.0505	16.9527	2278.7092	19.311	0.9384
	T2	0.0591	18.0902	2485.6595	19.7813	1.1173
	T3	0.0328	5.7968	1552.8482	32.7074	0.9578

光响应模型	处理	初始量子效率	最大净光合速	光饱和点	光补偿点	暗呼吸速率
实测值	CK	—	≈13.82	≈1900	≈27	≈1.34
	T1	—	≈16.92	≈2100	≈19	≈0.95
	T2	—	≈18.00	≈2100	≈20	≈1.01
	T3	—	≈5.93	≈1500	≈31	≈1.11
直角双曲线模型	CK	0.0466	17.3251	647.27	25.3003	1.103
	T1	0.0581	21.8965	636.84	21.4302	1.1772
	T2	0.0659	22.9871	667.6	21.2007	1.317
	T3	0.0689	10	487.39	57.0902	2.8217
非直角双曲线模型	CK	0.0465	17.3239	674.187	25.278	1.1017
	T1	0.0452	20.0765	582.635	18.7252	0.8289
	T2	0.053	21.397	619.96	19.4075	1.0015
	T3	0.0301	7.3137	472.76	33.7707	0.9415
指数模型	CK	0.0305	13.2997	1011.53	35.4721	1.0392
	T1	0.0402	16.8747	960.71	26.5826	1.0366
	T2	0.0449	17.794	912.08	23.8026	1.0384
	T3	0.0227	5.7391	612.24	55.9197	1.1377
直角双曲线修正模型	CK	0.0466	16.2217	2143.4297	25.2988	1.1029
	T1	0.0505	16.9527	2278.7092	19.311	0.9384
	T2	0.0591	18.0902	2485.6595	19.7813	1.1173
	T3	0.0328	5.7968	1552.8482	32.7074	0.9578

光响应模型	处理	相对误差				平均值
光响应模型	处理	最大净光合速	光饱和点	光补偿点	暗呼吸速率	平均值
直角双曲线模型	CK	0.254	0.645	0.063	0.177	0.293
	T1	0.294	0.697	0.128	0.239	0.347
	T2	0.277	0.682	0.06	0.304	0.388
	T3	0.686	0.675	0.842	0.542	0.946
	平均值	0.378	0.675	0.273	0.566	0.473
非直角双曲线模型	CK	0.254	0.645	0.064	0.178	0.293
	T1	0.187	0.723	0.014	0.127	0.27
	T2	0.189	0.705	0.03	0.008	0.24
	T3	0.233	0.685	0.089	0.152	0.3
	平均值	0.216	0.689	0.049	0.116	0.268
指数模型	CK	0.038	0.468	0.314	0.224	0.259
	T1	0.003	0.543	0.399	0.091	0.256
	T2	0.011	0.566	0.19	0.028	0.196
	T3	0.032	0.592	0.804	0.025	0.361
	平均值	0.021	0.542	0.427	0.092	0.271
直角双曲线修正模型	CK	0.174	0.128	0.063	0.177	0.136
	T1	0.002	0.085	0.016	0.012	0.029
	T2	0.005	0.184	0.011	0.106	0.077
	T3	0.022	0.035	0.055	0.137	0.062
	平均值	0.051	0.108	0.036	0.108	0.074

光响应模型	处理	相对误差				平均值
光响应模型	处理	最大净光合速	光饱和点	光补偿点	暗呼吸速率	平均值
直角双曲线模型	CK	0.254	0.645	0.063	0.177	0.293
	T1	0.294	0.697	0.128	0.239	0.347
	T2	0.277	0.682	0.06	0.304	0.388
	T3	0.686	0.675	0.842	0.542	0.946
	平均值	0.378	0.675	0.273	0.566	0.473
非直角双曲线模型	CK	0.254	0.645	0.064	0.178	0.293
	T1	0.187	0.723	0.014	0.127	0.27
	T2	0.189	0.705	0.03	0.008	0.24
	T3	0.233	0.685	0.089	0.152	0.3
	平均值	0.216	0.689	0.049	0.116	0.268
指数模型	CK	0.038	0.468	0.314	0.224	0.259
	T1	0.003	0.543	0.399	0.091	0.256
	T2	0.011	0.566	0.19	0.028	0.196
	T3	0.032	0.592	0.804	0.025	0.361
	平均值	0.021	0.542	0.427	0.092	0.271
直角双曲线修正模型	CK	0.174	0.128	0.063	0.177	0.136
	T1	0.002	0.085	0.016	0.012	0.029
	T2	0.005	0.184	0.011	0.106	0.077
	T3	0.022	0.035	0.055	0.137	0.062
	平均值	0.051	0.108	0.036	0.108	0.074

标准误差	CK	T1	T2	T3
直角双曲线模型	0.1774	0.5750	0.1970	0.6980
非直角双曲线模型	0.1774	0.4556	0.0613	0.1654
指数模型	0.4534	0.4265	0.2568	0.1597
直角双曲线修正模型	0.1774	0.4757	0.0632	0.1080