Photosynthetic Characteristics and Light Response Model Fitting of Wolfberry

doi:10.11924/j.issn.1000-6850.casb20190900678

Abstract

Abstract:

The paper aims to understand the photosynthetic characteristics of wolfberry, explore the applicability of different light response models to wolfberry photosynthesis, and provide a theoretical basis for the breeding new varieties. The paper used ‘14-Z44’, ‘14-2-3-20’ and ‘Ningqi 1’ as the materials, compared the leaf morphology physiology and photosynthetic characteristics, fitted the photosynthetic light response curve with different light response models of the three varieties. The leaf morphology and biomass were significantly different between ‘14-2-3-20’ and ‘Ningqi 1’, and there was no difference in leaf thickness and specific leaf weight. Compared with the measured values, the photosynthetic rates of the measurement points fitted by the rectangular hyperbola model and the non-rectangular hyperbola model were the closest to the measured values, but the photosynthetic parameters were significantly different with the measured values. The light response curve and photosynthetic parameters fitted by the modified rectangular hyperbola model were close to the measured values, and there was light inhibition. Compared with ‘Ningqi 1’, the photosynthetic parameters of ‘14-2-3-20’ and ‘14-z44’ were lower in LCP, LSP, Rd and higher in α, the Pn_max of ‘14-2-3-20’ was the highest. The comprehensive analysis shows that the modified rectangular hyperbola model is more suitable for fitting the wolfberry light response curve. ‘14-2-3-20’ has strong ability to use low light, high photosynthetic capacity under strong light, is not easy to be light suppressed, and has potential value in breeding high-yield varieties

Key words: wolfberry, leaf, light response model, photoresponse curve, photosynthetic parameter

CLC Number:

S663.9

He Xinru, Wang Qinping, Qin Ken, Dai Guoli, Zhou Jun, Zhao Ruiqiu. Photosynthetic Characteristics and Light Response Model Fitting of Wolfberry[J]. Chinese Agricultural Science Bulletin, 2020, 36(28): 57-62.

Figures/Tables 4

References 28

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材料	叶长/mm	叶宽/mm	叶面积/ mm²	叶厚/mm	叶鲜重/g	叶干重/g	比叶重/(mg/mm²)	叶绿素
宁杞1号	46.40±10.9b	8.47±2.1b	255.6±98.7b	0.52±0.07a	0.16±0.03b	0.02±0.005b	0.080±0.01a	64.2±2.6a
14-2-3-20	67.48±12.9a	15.14±4.1a	567.0±201.8a	0.46±0.15ab	0.26±0.11a	0.04±0.02a	0.078±0.003a	61.3±2.5ab
14-Z44	65.55±6.4a	12.21±2.0a	476.0±103.4a	0.36±0.05b	0.19±0.03ab	0.03±0.009a	0.063±0.002a	60.5±2.4b

材料	叶长/mm	叶宽/mm	叶面积/ mm²	叶厚/mm	叶鲜重/g	叶干重/g	比叶重/(mg/mm²)	叶绿素
宁杞1号	46.40±10.9b	8.47±2.1b	255.6±98.7b	0.52±0.07a	0.16±0.03b	0.02±0.005b	0.080±0.01a	64.2±2.6a
14-2-3-20	67.48±12.9a	15.14±4.1a	567.0±201.8a	0.46±0.15ab	0.26±0.11a	0.04±0.02a	0.078±0.003a	61.3±2.5ab
14-Z44	65.55±6.4a	12.21±2.0a	476.0±103.4a	0.36±0.05b	0.19±0.03ab	0.03±0.009a	0.063±0.002a	60.5±2.4b

材料	模型	α	Pn_max/[μmol/(m²·s)]	LCP/[μmol/(m²·s)]	LSP/[μmol/(m²·s)]	Rd/[μmol/(m²·s)]
宁杞1号	实测值	—	≈18.72	≈111.96	≈1800	≈3.426
	RHM	0.052	42.037	65.019	873.423	3.381
	NHM	0.044	32.726	89.9	833.659	3.955
	MRHM	0.036	18.262	106.996	1741.657	3.578
14-2-3-20	实测值	—	≈21.05	≈46.82	≈1500	≈1.648
	RHM	0.07	47.116	24.386	640.625	1.707
	NHM	0.054	31.979	42.8	635.037	3.313
	MRHM	0.044	20.675	45.092	1601.886	1.906
14-Z44	实测值	—	≈17.44	≈38.62	≈1200	≈2.074
	RHM	0.111	35.261	21.225	338.892	2.356
	NHM	0.101	23.68	28.5	262.97	2.88
	MRHM	0.08	19.004	34.068	1639.608	2.503

材料	模型	α	Pn_max/[μmol/(m²·s)]	LCP/[μmol/(m²·s)]	LSP/[μmol/(m²·s)]	Rd/[μmol/(m²·s)]
宁杞1号	实测值	—	≈18.72	≈111.96	≈1800	≈3.426
	RHM	0.052	42.037	65.019	873.423	3.381
	NHM	0.044	32.726	89.9	833.659	3.955
	MRHM	0.036	18.262	106.996	1741.657	3.578
14-2-3-20	实测值	—	≈21.05	≈46.82	≈1500	≈1.648
	RHM	0.07	47.116	24.386	640.625	1.707
	NHM	0.054	31.979	42.8	635.037	3.313
	MRHM	0.044	20.675	45.092	1601.886	1.906
14-Z44	实测值	—	≈17.44	≈38.62	≈1200	≈2.074
	RHM	0.111	35.261	21.225	338.892	2.356
	NHM	0.101	23.68	28.5	262.97	2.88
	MRHM	0.08	19.004	34.068	1639.608	2.503

	Pn_max	Rd	LCP	LSP	叶面积	比叶重	叶绿素
Pn_max	1
Rd	-0.473^*	1
LCP	-0.508^*	0.669^**	1
LSP	0.648^**	-0.518^*	-0.038	1
叶面积	0.141	-0.493^*	-0.600^**	0.041	1
比叶重	0.594^**	-0.014	0.059	0.552^*	-0.263	1
叶绿素	0.12	0.292	0.46	0.335	-0.211	0.441	1