Relationship between Photosynthetic Fluorescence Parameters of Algae and the Initial Biomass in the Measurement of Water Quality Biological Toxicity

Min CHEN; Gaofang YIN; Nanjing ZHAO; Tingting GAN; Mengyuan GU; Peilong QI; Zhichao DING; Lu WANG; Chun FENG; Xiaoling ZHANG

doi:10.3788/gzxb20225105.0517001

Journals >Acta Photonica Sinica >Volume 51 >Issue 5 >Page 0517001 > Article

Acta Photonica Sinica
Vol. 51, Issue 5, 0517001 (2022)

Relationship between Photosynthetic Fluorescence Parameters of Algae and the Initial Biomass in the Measurement of Water Quality Biological Toxicity

Min CHEN^1、2、3, Gaofang YIN^1、3、*, Nanjing ZHAO^1、3、*, Tingting GAN^1、2、3, Mengyuan GU^1、2、3, Peilong QI^1、2、3, Zhichao DING^1、2、3, Lu WANG^1、2、3, Chun FENG^1、2、3, and Xiaoling ZHANG⁴

Author Affiliations

¹Key Laboratory of Environmental Optics and Technology，Anhui Institute of Optic and Fine Mechanics，Hefei Institutes of Physical Science，China Academy of Sciences，Hefei 230031，China

²University of Science and Technology of China，Hefei 230026，China

³Key Laboratory of Optical Monitoring Technology for Environment，Hefei 230031，China

⁴Anhui University，Hefei 230039，China

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DOI: 10.3788/gzxb20225105.0517001 Cite this Article

Min CHEN, Gaofang YIN, Nanjing ZHAO, Tingting GAN, Mengyuan GU, Peilong QI, Zhichao DING, Lu WANG, Chun FENG, Xiaoling ZHANG. Relationship between Photosynthetic Fluorescence Parameters of Algae and the Initial Biomass in the Measurement of Water Quality Biological Toxicity[J]. Acta Photonica Sinica, 2022, 51(5): 0517001 Copy Citation Text

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Under short-term stress，the toxic response of 11 photosynthetic fluorescence parameters corresponding to different initial chlorophyll concentrations to 10 ug·L-1 DCMU

Fig. 1. Under short-term stress，the toxic response of 11 photosynthetic fluorescence parameters corresponding to different initial chlorophyll concentrations to 10 ug·L^-1 DCMU

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Fig. 2. The trend of 11 photosynthetic fluorescence parameters with chlorophyll concentration

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Fig. 3. The value of the parameter and the corresponding DCMU toxicity data EC₂₀ change trend with the initial chlorophyll concentration

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Parameter	Description
F₀	Minimum fluorescence yield（measured at open reaction centres state）
F_m	Maximal fluorescence output（measured at closed reaction centres state）
F_v	Variable fluorescence yield，F_v=F_m-F₀
F_v/F_m	The maximum photochemical quantum yield of PSII
Yield	The effective quantum yield of PSII photochemical energy conversion
α	Maximal light utilization coefficient，initial slope of the rP-E curve
rP	Relative PSII electron transfer rate
Ek	The onset of light saturation
σ_PSⅡ	Absorption cross section of PSII photochemistry（without ambient light）
τ_es	Time constant associated with the re-opening of a closed RCII with an empty Q_B site
JVPⅡ	PSII flux per unit volume

Table 1. Photosynthetic fluorescence parameters obtained from FRRf^［14］

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Parameter		Initial chlorophyll concentration/μg·L^-1								Recommended concentration/（μg·L^-1）
Parameter		4	10	20	100	200	500	1 000	2 000	Recommended concentration/（μg·L^-1）
F_v/F_m	EC₅₀	>40	15.33	15.58	15.75	15.35	16.05	16.62	17.16	10~2 000
	EC₂₀	6.83	3.21	3.30	3.17	2.99	3.42	3.37	3.43
	R²	0.987	0.998	0.999	0.997	0.997	0.994	1	1
Yield	EC₅₀	10.76	7.31	7.13	6.83	6.61	6.74	6.63	8.56	10~2 000
	EC₂₀	3.33	1.72	1.63	1.68	1.66	1.73	1.95	2.10
	R²	0.999	0.997	1	0.987	1	0.998	1	0.996
α	EC₅₀	11.57	7.76	6.43	6.24	6.21	6.12	6.66	7.16	10~2 000
	EC₂₀	3.78	2.10	1.84	1.86	1.81	1.93	2.34	2.20
	R²	0.999	0.989	0.999	0.987	1	0.994	1	0.998
rP	EC₅₀	10.96	7.84	7.13	6.83	6.61	6.71	6.64	8.54	10~2 000
	EC₂₀	3.33	1.75	1.66	1.68	1.64	1.73	1.96	2.21
	R²	0.999	0.996	1	0.997	1	0.998	1	0.996
σ_PSⅡ	EC₅₀	18.90	4.32	4.29	4.08	3.80	3.95	3.80	3.46	10~2 000
	EC₂₀	3.65	1.28	1.02	1.17	1.27	1.22	1.13	1.30
	R²	0.988	0.979	0.998	0.984	0.982	0.924	0.900	0.976
τ_es	EC₅₀	8.94	5.13	4.854	4.85	4.43	4.45	4.68	4.65	10~2 000
	EC₂₀	5.18	2.02	1.93	1.92	1.76	1.99	2.24	2.34
	R²	0.989	0.988	0.999	1	0.999	1	0.999	0.999
Ek	EC₅₀	>40	-	-	-	-	-	-	>40	-
	EC₂₀	20.518	-	-	-	-	-	-	2.084 88
	R²	0.526	-	-	-	-	-	-	0.625
F₀	EC₅₀	8.11	7.85	6.27	5.49	2.25	2.35	2.66	-	200~1 000
	EC₂₀	2.16	2.43	2.53	2.56	<1	1.001	1.00	-
	R²	0.876	0.887	0.972	1	1	0.993	0.991	-
F_m	EC₅₀	>40	>40	>40	>40	>40	>40	>40	-	200~1 000
	EC₂₀	8.80	7.66	6.38	5.23	3.53	3.38	3.59	-
	R²	0.867	0.834	0.810	0.879	0.986	0.983	0.962	-
F_v	EC₅₀	>40	>40	>40	>40	>40	>40	>40	>40	200~1 000
	EC₂₀	16.10	15.74	15.42	14.79	11.70	10.43	9.78	8.40
	R²	0.991	0.984	0.995	0.986	0.967	0.952	0.998	0.650
JVPⅡ	EC₅₀	-	-	＞40	-	-	-	-	-	-
	EC₂₀	-	-	5.289	-	-	-	-	-
	R²	-	-	0.666	-	-	-	-	-

Table 2. DCMU-related toxicity data（μg·L^-1）and dose-effect curve fitting effect（R²）obtained by photosynthetic fluorescence parameters under different initial biomass

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