Zoospore interspecific signaling promotes plant infection by Phytophthora

BMC Microbiology

Table 1 Effect of purified AI-2 on encystment and germination of P. nicotianae zoospores after overnight incubation at 23°C

Conc. of AI-2 (μM)	No. of cysts		No. of germinating cysts		No. of empty cells		No. of lysed zoospores^a
	M^b	Std^b	M	Std	M	Std	M	Std
0	5	0.3	12	2.3	39	1.0	1	3.8
0.01	10	0.3	7	0.5	22	1.3	17	1.0
0.1	5	0.5	4	0.8	22	0.8	25	0.5
1	2	0.3	0	0.0	21	1.8	33	2.0
10	11	0.5	0	0.0	22	2.1	19	2.5
100	20	1.0	0	0.0	0	0.0	36	1.0
1000	14	1.3	0	0.0	0	0.0	42	1.3

^a Difference between the total number of zoospores (56 ± 4) in SDW and those countable in AI-2 at each concentration.
^b M is the mean from 12 replicate fields (at 100×) of three assays. Std is the standard deviation.

ISSN: 1471-2180