Toxic oligopeptides in the cyanobacterium Planktothrix agardhii-dominated blooms and their effects on duckweed (Lemnaceae) development | Knowledge and Management of Aquatic Ecosystems

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Table 1

Characteristics of two different Planktothrix-dominated bloom samples and their crude extracts.

Species contribution to the biomass	Extract code	Biomass (mg FW L⁻¹)	Chlorophyll a (mg L⁻¹)	Total MCs (mg L⁻¹)	MCs in biomass (μg mg⁻¹ FW)	MCs variants (%)

						[Asp³, Mdha⁷] MC-RR + [Ser⁷]MC-RR	[Asp³, dha⁷] MC-LR	[Asp³]MC-HtyR
P. agardhii (97%), Aph. gracile (1.8%), Dolichospermum spp. (0.9%)	Pa-A	1142 ± 30	29.66 ± 0.07	14.80 ± 0.35	12.96	95.0 ± 0.4^a	3.2 ± 1.7	1.8 ± 0.8
P. agardhii (95%), M. aeruginosa (5%)	Pa-B	2776 ± 69	72.11 ± 2.50	0.55 ± 0.01	0.20	61.0 ± 4.1	38.6 ± 4.0	0.4 ± 0.04

Only [Ser⁷]MC-RR detected. Total MC concentration was set as 100%. Data are expressed as means ± SD, n = 5.

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