phytobacterial

The story

1. Proto-Indo-European*bʰuH-
2. Proto-Indo-European*bʰuHyéti
3. Ancient Greekφῠ́ω (phŭ́ō)
4. Ancient Greekφῠτός (phŭtós)
5. Ancient Greekφῠτόν (phŭtón)
6. Englishphyto-
7. Ancient Greekβακτηρία (baktēría)
8. Ancient Greekβακτήριον (baktḗrion)
9. New Latinbactēria
10. Englishbacteria
11. Proto-Indo-European*h₂el-
12. Proto-Indo-European*h₂élisder.?
13. Englishbacterial
14. English todayphytobacterial

From phyto- + bacterial.