Aerobic IAA degradation pathways identified in microbes.

<p>Blue arrows showed the iad-pathway, the typical examples are <i>Bradyrhizobium japonicum</i> [<a href="http://www.plosbiology.org/article/info:doi/10.1371/journal.pbio.3002921#pbio.3002921.ref023" target="_blank">23</a>] and <i>Variovorax paradoxus</i> [<a href="http://www.plosbiology.org/article/info:doi/10.1371/journal.pbio.3002921#pbio.3002921.ref024" target="_blank">24</a>]. Red arrows showed the iac-pathway, the typical examples are <i>Pseudomonas putida</i>, <i>Paraburkholderia phytofirmans</i>, and <i>Caballeronia glathei</i> [<a href="http://www.plosbiology.org/article/info:doi/10.1371/journal.pbio.3002921#pbio.3002921.ref018" target="_blank">18</a>,<a href="http://www.plosbiology.org/article/info:doi/10.1371/journal.pbio.3002921#pbio.3002921.ref020" target="_blank">20</a>,<a href="http://www.plosbiology.org/article/info:doi/10.1371/journal.pbio.3002921#pbio.3002921.ref022" target="_blank">22</a>]. Black arrows showed pathways were not well classified so far. In 1961, Tsubokura and colleagues reported that IAA was biotransformed to 2-formaminobenzoylacetate and fruther decomposed into anthranilate by a bacterium isolated from air [<a href="http://www.plosbiology.org/article/info:doi/10.1371/journal.pbio.3002921#pbio.3002921.ref070" target="_blank">70</a>]. It is reported that <i>Lysinibacillus xylanilyticus</i> strain MA transformed tryptophan to IAA and then decarboxylated to produce 3-methylindole (skatole) [<a href="http://www.plosbiology.org/article/info:doi/10.1371/journal.pbio.3002921#pbio.3002921.ref071" target="_blank">71</a>], and the downstream pathways of skatole catabolism were firstly identified in <i>Pseudomonas</i> (Migula) in 1958 [<a href="http://www.plosbiology.org/article/info:doi/10.1371/journal.pbio.3002921#pbio.3002921.ref072" target="_blank">72</a>].</p> <p>(PDF)</p>