Table II.

The effect of growth regulators on penetrance of the tnp mutant phenotype

Seedlings were grown on 1/2× MS 10 medium or medium supplemented with the indicated compound, and the number of seedlings with a wild-type (TNP) or tnp mutant phenotype (tnp) was counted 7 d postgermination. Independent experiments are separated by the dashed row. Asterisk (*) indicates that germination frequency was only approximately 25% of controls.

Medium	TNP	tnp	% tnp
1/2× MS 10	162	79	32.8
Naphthylacetic acid 10 nm	83	62	42.8
IAA 50 nm	75	168	69.1
2,4-D 10 nm	34	121	78.1
NPA 10 μm	86	107	55.4
NOA 10 μm	61	87	58.8
BA 100 nm	91	10	9.9
1-Aminocyclopropane-1-carboxylic acid 10 pm	104	43	29.3
GA 10 μm	96	57	37.3
1/2× MS 10	145	133	47.8
GA 10 nm	129	101	42.1
GA 100 nm	123	133	52.0
GA 1 μm	117	164	58.4
GA 10 μm	107	89	45.4
Paclobutrazol 10 nm	32	178	84.7
Paclobutrazol 100 nm*	13*	34*	72.3*
BA 10 nm	153	187	55.0
BA 100 nm	203	112	35.6
BA 1 μm	304	16	5.0
2,4-D 10 nm	42	192	82.1
2,4-D 100 nm	9	183	95.3
2,4-D 1 μm	4	224	98.2