Table 2 Number of Nod factors produced by the wild type R. tropici strain CIAT 899 and the nodD3, nodD4 and nodD5 mutants when grown in control B⁻ medium [20], with 3.4 μM of apigenin or salt (NaCl 300 mM). The structures of Nod factors under each condition are shown in Additional file 1: Table S1, Additional file 2: Table S2 and Additional file 3: Table S3

From: Opening the “black box” of nodD3, nodD4 and nodD5 genes of Rhizobium tropici strain CIAT 899