## 3 Results
### Antimicrobial Activities of Selected Strains  
The antimicrobial activities against the bacterial phytopathogens _Pseudomonas syringae_ pv. _syringae_ Cc1 (_Pss_), _Pectobacterium carotovorum_ NCPPB 312 (_Pc_), _Clavibacter michiganensis_ subsp. _michiganensis_ OP3 (_Cmm_), and _Agrobacterium tamefaciens_ C58C1 (_At_) were evaluated for the 21 selected strains. Ten isolates showed activity against _Pss_, eight against _Pc_, five against _At_, and 14 against _Cmm_ (Table 4). Ten strains that presented antimicrobial activity against INA bacteria (_Pss_ and _Pc_) were selected for the following studies. Six selected strains belong to _Pseudomonas_ genus (TmR1b, TmR5a, GcR15a, NUR4a, TmR7, and CcR1d), whereas four strains are member of the Actinobacteria phylum (_Arthobacter_ sp. BmP28, _Cutobacterium_ sp. BmP22c, _Brachybacterium_ sp. TmP30, and _Frondihabitans_ sp. GpP26d) (Figure 4).  
\begin{table}
\begin{tabular}{c c c c c} \hline \hline
**Strains** & **PS at RT/PS at** & _nifH/_ & **PST at RT/** & _nifH/_ \\  & **4 \({}^{\circ}\)C** & _acdS_ & **4 \({}^{\circ}\)C** & _acdS_ \\ \hline _Pseudomonas_ sp. TmR1b * & +/+ & +/\(-\) & _Stentrophomonas_ sp. TmP43c * & \(-/-\) & +/+ \\ _Pseudomonas_ sp. TmR34a & +/+ & +/\(-\) & _Stentrophomonas_ sp. TmR19b & \(-/-\) & +/\(-\) \\ _Pseudomonas_ sp. TmR35a & +/+ & +/\(-\) & _Brevundomonas_ sp. CpR34a & \(-/-\) & +/\(-\) \\ _Pseudomonas_ sp. TmR5a * & +/+ & +/+ & _Arthobacter_ sp. BmP28 * & +/\(-\) & +/+ \\ _Pseudomonas_ sp. GcR15a * & \(-/-\) & +/+ & _Arthobacter_ sp. BmR37 & +/\(-\) & +/\(-\) \\ _Pseudomonas_ sp. NUR4a * & +/+ & \(-/+\) & _Arthobacter_ sp. CpR32a & \(-/-\) & +/\(-\) \\ _Pseudomonas_ sp. BIR7b * & +/+ & +/+ & _Peaarthbroacher_ sp. BIR11a & \(-/-\) & +/\(-\) \\ _Pseudomonas_ sp. BIR3 * & +/+ & +/+ & _Pseudirdirdrobacher_ sp. TmP42 & \(-/-\) & +/\(-\) \\ _Pseudomonas_ sp. TmR7 * & +/+ & +/+ & _Pseudirdirdrobacher_ sp. GcR10 & \(-/-\) & +/\(-\) \\ _Pseudomonas_ sp. CeR1d * & +/+ & +/\(-\) & _Curtobacterium_ sp. GcR11a & \(-/-\) & +/\(-\) \\ _Serratia_ sp. CpR7a & +/+ & \(-/-\) & _Curtobacterium_ sp. BmP22c * & \(-/-\) & \(-/+\) \\ _Serratia_ sp. TmR3a * & +/+ & +/\(-\) & _Curtobacterium_ sp. BmP18c * & \(-/-\) & \(-/-\) \\ _Stenrophonomas_ sp. BmP26c & \(-/-\) & +/\(-\) & _Brachybacterium_ sp. TmP24d & \(-/-\) & +/+ \\ _Pseudrophonomas_ sp. BmP35 * & \(-/-\) & +/+ & _Brachybacterium_ sp. TmP30 & \(-/-\) & +/+ \\ _Pseudrophonomas_ sp. CpP23d * & \(-/-\) & +/+ & _Frondihabitans_ sp. GpP26d * & \(-/-\) & +/+ \\ _Stenrophonomas_ sp. CpR10 * & \(-/-\) & +/+ & _Sprosarcina_ sp. HgT2b * & \(-/-\) & +/+ \\ _Stenrophonomas_ sp. CpR13a & \(-/-\) & +/+ & _Sporosarcina_ sp. Hs8 * & \(-/-\) & +/+ \\ _Stenrophonomas_ sp. CpR8a & \(-/-\) & +/+ & _Bacillus_ sp. GcP2b & +/\(-\) & \(-/-\) \\ _Stenrophonomas_ sp. CpR12a & \(-/-\) & +/\(-\) & _Pedobacter_ sp. CpR35b & \(-/-\) & \(-/-\) \\ _Stenrophonomas_ sp. GpR8b & \(-/-\) & +/+ & _Flavobacterium_ sp. CpR5c * & +/+ & +/\(-\) \\ _Stenrophonomas_ sp. GcR23 * & \(-/-\) & +/+ & +/+ & \\ \hline \hline \end{tabular}
* Selected strains. +, positive activity/amplification; \(-\), negative activity/amplification; PS, phosphate solubilization; RT, room temperature.  
\end{table}
Table 3: Selected strains showing the higher phosphate solubilization activity and presence of _nifH_ and _acdS_ genes revealed by PCR.