TABLE 1.

Distribution of blcC among Agrobacterium and Rhizobium isolates

StrainaBiovarfTraR-QS (reference)bC58 blcC homolog(s)cGrowth ond:
GlucoseGBL
Agrobacterium spp.
    C58*1E, S (39)SA+, G+++++++++++
    A6*1E, S (59)SA+++++++++++
    15955*1E, S (16)SA+++++++++
    R101E, S (18)SA+++++++++++
    Ach51E, S (59)SA++++++++++
    IIBv71NDSA++++++++++
    Chry5*1E, S (34)SA++++++++
    Ant4*1E (51)SA+++++++++
    Bo542*1E, S (34)SA+++++
    T371E (14)SA++++++
    K599*1S (4)SA++++++
    B6S3e1E, S (46)SA+++++
    B6-Schile1E, S (46)SA+++++
    K84*2E, S (35)SA, G+++++
    J732NDSA++++++
    AB2-73*2E (50)SA+++++
    A4*2E, S (36)SA+++++
    K299*2E (35)SA++++++
    81962E (36)SA+++++
    S43SSA+++++
    TM43NDSA+++++
R. leguminosarum 3841NAE, S (55)G++++++++++
R. etli CFN42NAE, S (48)G++++++
  • a All listed strains are held in our collection. Strains marked with an asterisk have been reported to produce N-(3-oxooctanoyl)-l-homoserine lactone (4).

  • b TraR-QS, presence of a plasmid coding for a TraR-type quorum-sensing system; E, experimentally determined; S, determined by sequence analysis; ND, no data available.

  • c Determined by moderate-stringency Southern analysis using a blcC probe (SA+ and SA) and by Blastn, Blastp, and TBlastn analyses of genome sequences available in public databases (G+ and G).

  • d Growth on solid minimal medium with the indicated substrate as the sole carbon source was assessed visually and graded from +++++ (luxuriant growth) to − (no detectable growth).

  • e Two isolates of strain B6 with different plasmid complements (20).

  • f NA, not applicable.