Pseudomonas helianthi

{{Short description|Species of bacterium}}

{{Speciesbox

| image =

| genus = Pseudomonas

| species = helianthi

| authority = Elasri et al. 2001

| type_strain = [http://www.angers.inra.fr/cfbp/resultsuite.php?r0=1694&r1=Pseudomonas%20syringae%20pv.%20tagetis&r2=Pseudomonas&r3=syringae&r4=tagetis&r5=&r6=souche%20pathotype&r7=NCPPB%202488,%20ICMP%204091,%20LMG%205090&r8=&r9=Bradbury%20J.F.%20B5063&r10=Tagetes%20erecta&r11=&r12=1972&r13=Zimbabwe&r14=&r15=&r16=&r17=&r18=&r19=&r20=&r21=(Hellmers%201955)%20Young,%20Dye%20et%20Wilkie%201978 CFPB 1694]

| synonyms =

| subdivision_ranks = Pathovars

| subdivision =

• "P. h." pv. helianthi
• "P. h." pv. tagetis

}}

"Pseudomonas helianthi" is a Gram-negative plant pathogenic bacterium that infects a variety of plants. It was once considered a pathovar of Pseudomonas syringae, but following DNA-relatedness studies, it was recognized as a separate species and P. syringae pv. tagetis was incorporated into it, as well.{{cite journal |author=Gardan |title=DNA relatedness among the pathovars of Pseudomonas syringae and description of Pseudomonas tremae sp. nov. and Pseudomonas cannabina sp. nov. (ex Sutic and Dowson 1959) |journal=Int J Syst Bacteriol |volume=49 |pages=469–78 |date=Apr 1999 |pmid=10319466 |last2=Shafik |first2=H |last3=Belouin |first3=S |last4=Broch |first4=R |last5=Grimont |first5=F |last6=Grimont |first6=PA |doi=10.1099/00207713-49-2-469 |display-authors=1 |issue=2|doi-access=free }} Since no official name has yet been given, it is referred to by the epithet 'Pseudomonas helianthi' .{{cite journal |author=Elasri |title=Acyl-Homoserine Lactone Production Is More Common among Plant-Associated Pseudomonas spp. than among Soilborne Pseudomonas spp |journal=Appl Environ Microbiol |volume=67 |issue=3 |pages=1198–209 |date=Mar 2001 |pmid=11229911 |doi=10.1128/AEM.67.3.1198-1209.2001 |last2=Delorme |first2=S |last3=Lemanceau |first3=P |last4=Stewart |first4=G |last5=Laue |first5=B |last6=Glickmann |first6=E |last7=Oger |first7=PM |last8=Dessaux |first8=Y |pmc=92714 |bibcode=2001ApEnM..67.1198E |display-authors=1}}