Table A2.

Induction of β-galactosidase activity in A. tumefaciens NTL4 (pZLR4) by AHLs obtained from supernatants of peanut-nodulating rhizobial strains.

Strain	Activity *
A. tumefaciens NTL4 (pTiC58ΔaccR) ▪	349.6 ± 27.5
A. tumefaciens NTL4 ▴	47.0 ± 10.0
A. tumefaciens NTL4 (pZLR4) ♦	47.0 ± 5.0
Low AHL-like inducer activity (≤ 100)
PC29	68.7 ± 16.0
PC27	94.6 ± 6.1
PC30	70.2 ± 12.1
PC34	94.3 ± 8.7
6H	91.9 ± 6.0
Moderate AHL-like inducer activity (≥ 100 < 200)
15A	123.5 ± 30.3
20AG	129.3 ± 35.8
62AG	109.3 ± 22.6
27LA	101.8 ± 42.6
36A	118.5 ± 17.0
PC3	102.2 ± 12.8
62B	197.1 ± 10.7
55AG	153.9 ± 4.4
High AHL-like inducer activity (≥ 200)
P8A	369.7 ± 15.5
P8B	411.8 ± 17.1
PC31	678.9 ± 50.4

^*β-Gal activity expressed in Miller units;

^▪Control +;

^▴Control −;

^♦Biosensor strain under control conditions (no AHL added).