## 2 Results and Discussion
### Plant Growth Promotion Potential
#### 2.4.1 Nutrient (N, P, S, Fe) Acquisition
\begin{table}
\begin{tabular}{c c c c c} \hline \hline
**Gene** & **Accession Number** & **KO Number** & **Gene Product** & **Activity** \\ \hline _iscS_ & MBG8561789.1 & K04487 & Cysteine desulfurase & Nitrogen fixation \\ _iscU_ & MBG8560681.1 & K04488 & Nitrogen fixation protein nifu & \\ \hline _gcd_ & MBG8562075.1 & K00117 & Quinoprotein glucose dehydrogenase & Phosphate \\  & & & (EC:1.1.5.2) & solubilization \\ _pqqA_ & MBG8558041.1 & K06135 & Pyrroloquinoline quinone biosynthesis & \\  & & & protein A & \\ _pqqB_ & MBG8558042.1 & K06136 & Pyrroloquinoline quinone biosynthesis & \\  & & & protein B & \\ _pqqC_ & MBG8558043.1 & K06137 & Pyrroloquinoline-quinone synthase & \\  & & & (EC:1.3.3.11) & \\ _pqqD_ & MBG8558044.1 & K06138 & Pyrroloquinoline quinone biosynthesis & \\  & & & protein D & \\ _pqqE_ & MBG8558045.1 & K06139 & Pqqa peptide cyclase (EC:1.21.98.4) & \\ _ppa_ & MBG8560327.1 & K01507 & Inorganic pyrophosphate (EC:3.6.1.1) & \\  & & & Exopolyn phosphatase/guanosine-5\({}^{\prime}\)- & \\ _prx-gppA_ & MBG8558276.1 & K01524 & triphosphate,3\({}^{\prime}\)-diphosphate & \\  & & & pyrophosphatase (EC:3.6.1.11 3.6.1.40) & \\ _pstB_ & MBG8558408.1 & K02036 & Phosphate transport system ATP-binding & \\  & & & protein (EC:7.3.2.1) & \\ _pstA_ & MBG8558409.1 & K02038 & Phosphate transport system permease protein & \\ _pstC_ & MBG8558410.1 & K02037 & Phosphate transport system permease protein & \\  & & & substrate-binding protein & \\ _pit_ & MBG8560129.1 & K16322 & Low-affinity inorganic phosphate transporter & \\ _ploB_ & MBG8558402.1 & K07657 & Two-component system. Ompr family. & \\  & & & Phosphate regulation response regulator phob & \\  & & & Two-component system. Ompr family. & \\ _phoR_ & MBG8558403.1 & K07636 & Phosphate regulon sensor histidine kinase & \\  & & & phor (EC:2.7.13.3) & \\ _phoU_ & MBG8558407.1 & K02039 & Phosphate transport system protein & \\ \hline _ssuA_ & MBG8561374.1 & K15553 & Sulfonate transport system & \\  & & & substrate-binding protein & \\ _ssuB_ & MBG8560999.1 & K15555 & Sulfonate transport system ATP-binding & \\  & & & protein (EC:7.6.2.14) & \\ _ssuC_ & MBG8561372.1 & K15554 & Sulfonate transport system permease protein & \\ _ssuD_ & MBG8561373.1 & K04091 & Alkanesulfonate monooxygenase & \\ _ssuE_ & MBG8561375.1 & K00299 & FMN reductase (EC:1.5.1.38) & \\ _cysP_ & MBG8561508.1 & K02048 & Sulfate/thiosulfate transport system & \\  & & substrate-binding protein & \\ _cysU_ & MBG8561415.1 & K02046 & Sulfate/thiosulfate transport system & \\  & & & permease protein & \\ _cysW_ & MBG8561414.1 & K02047 & Sulfate/thiosulfate transport system & \\  & & & permease protein & \\ _cysA_ & MBG8561413.1 & K02045 & Sulfate/thiosulfate transport system & \\  & & & ATP-binding protein (EC:7.3.2.3) & \\ _cysI_ & MBG8558903.1 & K00381 & Sulfate reductase (NADPH) hemoprotein & \\  & & & beta-component (EC:1.8.1.2) & \\ _cysJ_ & MBG8560698.1 & K00380 & Sulfate reductase (NADPH) flavoprotein & \\  & & & alpha-component (EC:1.8.1.2) & \\ _CTH_ & MBG8560530.1 & K01758 & Cystathionine \(\gamma\)-lysae & \\ _CBS_ & MBG8560531.1 & K01697 & Cystathionine \(\beta\)-lysae & \\ _TST_ & MBG8560836.1 & K01011 & Thiosulfate/3-mercaptoethanolpyruvate & \\  & & & sulfurtransferase & \\ \hline \hline \end{tabular}
\end{table} 
Table 4: Products of the genes involved in the most important plant growth promotion traits presented in the genome of the ZCR6 strain. Phosphorus is another essential nutrient for plants; however, a large proportion exists in an insoluble form and is thus unavailable for plants. Some soil bacteria play important roles in regulating P availability. This process is mainly mediated by enzymes involved in (1) inorganic P solubilization and organic P mineralization, (2) P uptake and transport, and (3) P starvation response regulation encoded by three corresponding groups of genes [34]. Genome analysis of the ZCR6 strain revealed the presence of genes from all three groups.