Table 4.

Occurrence and relative abundance of the 30 most common oomycete OTUs (shown as a proportion of all of the high-quality fungal sequences) in the roots and soil of the five tree species that were bare-root cultivated in the forest nurseries. The data from the different forest nurseries are combined.

OTU	Reference	Similarity % a	Alnus glutinosa		Betula pendula		Picea abies		Pinus sylvestris		Quercus robur		All	All	Total %
			Roots %	Soil %	Roots %	Soil %	Roots %	Soil %	Roots %	Soil %	Roots %	Soil %	Roots %	Soil %
Pythium ultimum var. ultimum	AY598657	917/917 (100)	0.258	0.559	0.076	1.435	0.048	0.829	0.067	1.349	0.030	1.554	0.094	1.161	0.59
Pythium heterothallicum	AY598654	882/889 (99)	0.143	0.210	0.076	0.545	-	0.251	0.008	0.812	0.030	0.829	0.038	0.534	0.27
Pythium spiculum	HQ643790	972/978 (99)	0.072	0.047	0.038	0.040	0.032	0.088	1.243	0.114	-	-	0.423	0.068	0.26
Pythium sylvaticum	AY598645	997/999 (99)	0.172	0.326	0.496	0.385	0.088	0.138	0.243	0.057	0.030	0.466	0.177	0.238	0.21
Pythium irregulare	AY598702	1026/1029 (99)	0.043	0.280	0.076	0.133	0.128	0.301	0.151	0.114	0.091	0.207	0.113	0.198	0.15
Peronospora sp. 3993_148	MF372507	803/852 (94)	-	-	-	-	-	-	-	-	2.765	-	0.244	-	0.13
Pythium intermedium	KU211482	957/959 (99)	-	0.489	0.038	0.133	-	0.038	0.059	0.057	-	0.026	0.021	0.124	0.07
Pythium amasculinum	AY598671	856/857 (99)	0.029	-	-	0.159	0.008	0.025	0.008	0.023	-	0.363	0.011	0.093	0.05
Pythium sp. 3993_349	KU211471	894/907 (99)	0.014	0.047	-	0.053	0.024	-	0.008	0.057	-	0.363	0.013	0.077	0.04
Unidentified sp. 3993_508	MF570293	101/119 (85)	0.029	0.047	0.038	0.040	0.008	0.050	0.025	0.069	0.030	0.104	0.021	0.059	0.04
Pythium acanthicum	AY598617	858/859 (99)	0.014	-	-	0.013	0.040	0.050	0.017	0.057	0.030	0.104	0.024	0.043	0.03
Pythium apiculatum	HQ643443	948/954 (99)	0.072	0.023	-	0.120	-	0.063	-	0.011	0.061	-	0.019	0.049	0.03
Pythium rostratifingens	KU211363	1053/1064 (99)	0.115	0.023	0.038	0.066	-	-	-	0.034	0.030	0.104	0.027	0.040	0.03
Phytopythium citrinum	HM061322	852/857 (99)	-	-	0.496	-	-	-	0.008	-	0.030	-	0.040	-	0.02
Unidentified sp. 3993_709	KJ716873	724/865 (84)	-	-	-	-	0.016	-	0.109	0.011	-	-	0.040	0.003	0.02
Pythium pleroticum	AY598642	958/959 (99)	-	0.093	-	-	-	0.063	-	-	-	0.078	-	0.037	0.02
Pythium sp. 3993_1159	AY598639	940/966 (97)	0.086	-	-	-	-	0.075	-	-	-	-	0.016	0.019	0.02
Unidentified sp. 3993_729	HQ643756	226/240 (94)	-	-	-	-	0.064	0.013	0.008	0.023	-	-	0.024	0.009	0.02
Pythium rostratifingens	KU209835	962/969 (99)	-	0.047	-	0.053	-	0.050	-	-	-	-	-	0.031	0.01
Pythium sp. 3993_1163	AY598696	993/1036 (96)	0.043	-	-	-	-	0.013	-	0.034	-	0.078	0.008	0.022	0.01
Unidentified sp. 3993_943	MH671329	870/883 (99)	-	-	-	-	0.048	0.025	-	0.011	-	0.026	0.016	0.012	0.01
Unidentified sp. 3993_1191	KF318041	606/754 (80)	-	0.023	-	-	-	-	-	0.046	-	0.104	-	0.028	0.01
Phytophthora fragariae	KJ755093	896/905 (99)	0.029	0.116	0.038	-	-	-	-	-	-	-	0.008	0.015	0.01
Phytophthora pseudosyringae	EU074793	838/848 (99)	-	-	-	-	-	-	-	0.011	-	0.181	-	0.025	0.01
Pythium violae	AY598717	1001/1006 (99)	0.043	0.023	-	0.013	-	0.025	-	0.011	-	-	0.008	0.015	0.01
Unidentified sp. 3993_1954	LC176476	143/157 (91)	0.057	-	-	0.053	-	-	-	-	-	-	0.011	0.012	0.01
Unidentified sp. 3993_981	KF318041	602/754 (80)	-	0.023	-	0.040	-	-	-	-	-	0.104	-	0.025	0.01
Pythium sp. 3993_1117	JF431913	804/842 (95)	-	-	-	0.013	-	0.050	-	-	-	0.052	-	0.022	0.01
Unidentified sp. 3993_1171	KJ716873	797/854 (93)	0.014	-	-	0.040	-	-	-	-	-	0.078	0.003	0.019	0.01
Hyaloperonospora brassicae	MG757782	940/943 (99)	-	-	-	-	-	-	0.050	-	-	-	0.016	-	0.01
Total of 30 OTUs			1.232	2.377	1.412	3.336	0.503	2.148	2.007	2.905	3.130	4.816	1.414	2.977	2.14

^a Sequence similarity column shows base pairs compared between the query sequence and the reference sequence in the NCBI databases, with the percentage of the sequence similarity in parentheses.