Table 2.

Effects of calcium inhibitors on self-incompatible pollen tube growth

	Experiment 1			Experiment 2			Experiment 3			Average pollen tube growth (%)
	No. of pollen	No. pollen tubes	Pollen growth (%)	No. of pollen	No. of pollen tubes	Pollen growth (%)	No. of pollen	No. of pollen tubes	Pollen growth (%)
Control	98	0	0	105	0	0	126	0	0	0
La3+	84	48	57·1	84	53	63·1	137	81	59·1	59·8 ± 3**
Verapamil	205	77	37·6	144	49	34	167	71	42·5	38 ± 4*
Calcimycin	151	0	0	107	0	0	100	0	0	0
EGTA	130	0	0	100	0	0	114	0	0	0
Ruthenium red	105	0	0	126	0	0	100	0	0	0

Percentage pollen tube growth is given as mean ± s.d. of three replicate experiments. **P < 0·001; *P < 0·01 as determined by Student's t-test.