Seasonal variation of phenolic compounds in Zostera marina (Zosteraceae) from the Baltic Sea Author Li, Yan * & Pharmazeutisches Institut, Abteilung Pharmazeutische Biologie, Christian-Albrechts-Universitat ¨ zu Kiel, Gutenbergstrasse 76, 24118, Kiel, Germany Author R, Lucie Author Scarpato, Silvia Author Çiçek, Serhat Sezai Author Jordheim, Monica Author Stenclov, Tereza Author Strnad, Miroslav Author Mangoni, Alfonso Author Zidorn, Christian text Phytochemistry 2022 113099 2022-04-30 196 1 10 http://dx.doi.org/10.1016/j.phytochem.2022.113099 journal article 54876 10.1016/j.phytochem.2022.113099 efc7c65f-708f-41b9-8e63-c864febf03cd 1873-3700 8257030

Table 2 Phenolic amounts in plants collected in different months. Data are expressed as mg/g (dry weight, DW) of plant material (mean values ± s.d.).

Sample	Aug. 2019	Sept.	Oct. 2019	Nov. 2019	Dec. 2019	Jan. 2020	Feb. 2020	Mar. 2020	Apr. 2020	May 2020	Jun. 2020	Jul. 2020
a TDS: total disulfated flavonoids. b TMS: total mono-sulfated flavonoids. c TF: total flavonoids. d TPA: total phenolic acids. e var: variable, only detected in two samples, but absent from the remaining samples. f nq: not quantified, concentration too low.
		2019
Flavonoids
1	nq	nq	0.03 ±	0.03 ±	0.02 ±	0.02 ±	nq	0.04 ±	0.03 ±	0.04 ±	0.08 ±	var
			0.00	0.00	0.00	0.00		0.01	0.00	0.01	0.02
5	var e	var	0.03 ±	0.03 ±	0.02 ±	0.02 ±	nq	0.04 ±	0.03 ±	0.05 ±	0.14 ±	0.06 ±
			0.00	0.00	0.00	0.00		0.00	0.00	0.01	0.02	0.00
7	nq f	nq	nq	nq	nq	nq	nq	nq	0.04 ±	0.02 ±	0.05 ±	0.02 ±
									0.00	0.00	0.01	0.00
9	0.02 ±	nq	0.07 ±	0.12 ±	0.06 ±	0.03 ±	nq	0.04 ±	0.20 ±	0.06 ±	0.32 ±	0.05 ±
	0.00		0.01	0.01	0.00	0.00		0.00	0.01	0.01	0.03	0.00
10	0.05 ±	0.03 ±	0.53 ±	1.25 ±	0.76 ±	0.13 ±	var	0.27 ±	0.79 ±	0.15 ±	1.30 ±	0.51 ±
	0.00	0.00	0.06	0.05	0.02	0.01		0.02	0.03	0.02	0.12	0.03
15	0.03 ±	0.02 ±	0.18 ±	0.44 ±	0.23 ±	0.07 ±	nq	0.33 ±	0.72 ±	0.19 ±	1.24 ±	0.39 ±
	0.00	0.00	0.01	0.03	0.00	0.01		0.01	0.03	0.00	0.09	0.03
16	0.02 ±	nq	0.05 ±	0.08 ±	0.07 ±	0.03 ±	nq	0.04 ±	0.07 ±	0.04 ±	0.14 ±	0.04 ±
	0.00		0.01	0.01	0.00	0.01		0.00	0.01	0.00	0.02	0.00
17	0.02 ±	nq	0.09 ±	0.22 ±	0.16 ±	0.05 ±	nq	0.10 ±	0.27 ±	0.06 ±	0.31 ±	0.10 ±
	0.00		0.01	0.01	0.01	0.01		0.01	0.01	0.01	0.03	0.01
Phenolic acids
18	0.10 ±	0.05 ±	0.14 ±	0.13 ±	0.10 ±	0.06 ±	0.04 ±	0.04 ±	0.10 ±	0.12 ±	0.15 ±	0.08 ±
	0.00	0.00	0.01	0.02	0.01	0.02	0.01	0.00	0.01	0.01	0.01	0.01
19	0.14 ±	0.04 ±	0.10 ±	0.10 ±	0.07 ±	0.04 ±	0.03 ±	0.05 ±	0.12 ±	0.11 ±	0.39 ±	0.07 ±
	0.03	0.01	0.01	0.01	0.00	0.00	0.00	0.03	0.01	0.02	0.04	0.01
20	0.25 ±	nq	1.92 ±	3.87 ±	1.63 ±	0.14 ±	nq	0.78 ±	7.80 ±	0.85 ±	15.7 ± 1.5	0.32 ±
	0.07		0.41	0.28	0.16	0.02		0.16	0.49	0.16		0.01
21	0.02 ±	nq	0.07 ±	0.14 ±	0.06 ±	0.03 ±	nq	nq	0.13 ±	0.10 ±	0.51 ±	var
	0.00		0.02	0.02	0.01	0.01			0.02	0.01	0.05
TDS a	0.07 ±	0.03 ±	0.62 ±	1.47 ±	0.92 ±	0.18 ±		0.37 ±	1.06 ±	0.21 ±	1.61 ±	0.61 ±
	0.00	0.00	0.06	0.05	0.02	0.01		0.01	0.03c	0.02	0.12	0.03
TMS b	0.07 ±	0.02 ±	0.30 ±	0.64 ±	0.37 ±	0.12 ±		0.40 ±	0.99 ±	0.30 ±	1.70 ±	0.48 ±
	0.00	0.00	0.01	0.03	0.01	0.01		0.01	0.03	0.03	0.09	0.03
TF c	0.14 ±	0.05 ±	0.98 ±	2.16 ±	1.34 ±	0.34 ±		0.86 ±	2.14 ±	0.61 ±	3.57 ±	1.17 ±
	0.02	0.01	0.11	0.08	0.04	0.01		0.04	0.10	0.04	0.35	0.04
TPA d	0.51 ±	0.09 ±	2.23 ±	4.25 ±	1.86 ±	0.27 ±	0.07 ±	0.87 ±	8.15 ±	1.18 ±	16.8 ± 1.5	0.48 ±
	0.07	0.03	0.41	0.28	0.16	0.02	0.00	0.16	0.49	0.17		0.06