Table 1. Effects of Mn and Zn on mycelial growth, sporangia production, sporangia release and zoospore germination of P. nicotianae.

The values are means ± SD of three replicates from repeating tests. Values in each column by different letters are significantly different at P < 0.05 (Duncan’s multiple range test).

Indexes	Manganese concentration (mg/L)						Zinc concentration (mg/L)
	0	0.1	1	10	100	200	0	0.1	0.5	1	5	10	20
Colony diameter (mm)	67.7 ± 0.5a	65.4 ± 1.7b	63.6 ± 2.0b	55.4 ± 0.2c	53.5 ± 1.1c	45.6 ± 0.8d	67.7 ± 0.5a	67.8 ± 2.0a	66.1 ± 3.0ab	64.9 ± 2.0ab	64.0 ± 1.2bc	61.1 ± 1.7c	54.6 ± 2.3d
Sporangium number	75.2 ± 4.3a	51.2 ± 3.5b	29.5 ± 2.5c	21.2 ± 0.7d	16.1 ± 2.6e	9.6 ± 0.6f	75.2 ± 4.3a	60.0 ± 5.0b	58.7 ± 7.0b	44.3 ± 4.0c	42.7 ± 4.0c	40.0 ± 2.0cd	32.7 ± 2.1d
Sporangial release rate (%)	74.7 ± 4.2a	42.5 ± 2.7b	25.1 ± 1.6c	15.6 ± 0.7d	11.7 ± 1.6d	3.9 ± 0.3e	74.7 ± 4.2a	74.4 ± 2.6a	71.1 ± 2.4ab	68.8 ± 1.5b	67.3 ± 1.9bc	63.3 ± 3.0c	58.2 ± 3.2d
Zoospore germination rate (%)	72.9 ± 1.2a	58.1 ± 2.5b	53.8 ± 1.7c	51.1 ± 1.6c	41.8 ± 1.9d	37.0 ± 1.5e	72.9 ± 1.2a	69.7 ± 1.8b	58.6 ± 1.9c	60.7 ± 1.8c	51.6 ± 2.4d	43.4 ± 1.2e	44.7 ± 1.5e