Editing Texas root rot (section)

== Pathogenesis ==
As a soil borne pathogen, ''P. omnivora'' enters the plant host via the roots.<ref name=":1" /> It penetrates the host by growing infectious hyphae that cover the host plant root's epidermis and eventually infects epidermis and cortical cell junctions of plant host instead of having specialized penetration organs like an appressoria.<ref name=":1" /> From there the fungal pathogen infects root vascular system and begin cause cortical root lesions, which is most pronounced in cotton. Microarray analysis and gene expression profiling revealed that certain pathways related to plant defense such as jasmonic acid, ethylene, and flavonoid production were reduced at later infectious stages.<ref name=":2">{{Cite journal|last=Uppalapati, S. R. |display-authors=etal |year=2009|title=Global Gene Expression Profiling During ''Medicago truncatula''–''Phymatotrichopsis omnivora'' Interaction Reveals a Role for Jasmonic Acid, Ethylene, and the Flavonoid Pathway in Disease Development|journal= [[Molecular Plant-Microbe Interactions]] |volume=22|issue=1|pages=7–17|doi=10.1094/mpmi-22-1-0007|pmid=19061398|doi-access=free}}</ref> This suggests that ''P. omnivora'' is able to suppress the production of these phytochemical defenses to ensure disease success.<ref name=":2" />