EPPO Data Sheets on Xanthomonas vesicatoria has mentioned that it was found on fruits of potato.
(http://www.eppo.int/QUARANTINE/bacteria/Xanthomonas_vesicatoria/XANTVE_ds.pdf)
Has anybody met xanthomonads capable to cause disease of potato?
If xanthomonads cannot infect potato, which specific compound or immunity mechanism can protect the plant from such infection?
Dear Alex, at present I don't have any experience/info respect to Xanth on potato. G
Giorgio, I am thinking of genetic factor that controls potato immunity to xanthomonads and chance to use it for other crops...
Dear Alex, I never read about infection of Xanthomonas on potato plants. I think that could be interesting to try an artificial infection... by using Xanthomonas isolated on tomato, for example....
Loredana, I guess that some strains of X. arboricola or X. raphani will infect potato, but we could see symptoms at high temperature only (24-25oC).
Alex Ignatov, if what you wanted to use the hypothesis of Xanthomonas not infecting potato is to search for candidate genetic factors that control immunity, then there are several plants outside potato that Xanthomonas species may not attack. I guess you can use those. Moreover, most Xanthomonas are host specific so you could simply use an X species that is pathogenic on one plant but not on another, and explore why it is not pathogenic on the other plant. Good luck Sir.
Interesting question. Never thought of patato fruit as normally we think if tubers. I just looked at potato fruits in google images and it is so much like tomato. Xanthomonas infects pepper and tomato on leaves as well as fruits. While it is potentially possible that Xanthomonas could infect potato, it is less likely because no one ever reported leaf spots on potato.
Parm,
Looking at leaf spots of potato people usually think of Alternaria sp or late blight.
Here, we have Clavibacter michiganensis sbsp. michiganensis Potato race that cause bacterial leaf blight at June-July, but not every year. Pantoea agglomerance -like bacteria are the most common in leaf spots (practically 100% pure, they are good antagonists), but nobody has proved so far that they can actually cause the disease.
I know that Pantoea often follow initial infection by Pseudomonas or Xanthomonas on other crops...
Alex
Be careful of artificial inoculations: I got Xanthomonas campestris pv campestris from cabbage to infect lettuce by artificial inoculation, with injection by syringe. The lettuce lesion was a classic V shaped chlorotic lesion running down the main vein.
We have endemic leaf spot of tomato and pepper in South Africa but not on potato or eggplant.. So Xanthomonas is probably limited to tomato and pepper.
Mark, thank you. I have some old results on brassicas inoculation by diverse xanthomonads . They were grouped in 3 types: 1st gave symptoms of V-shaped lesions after central rib inoculation (X. vitians, X. carotae, X. from onions), 2nd - HR reaction (X. vesicatoria, X. oryzae), 3rd - no symptoms, but bacteria were alive in plant tissue at least for 3 months (X. fuscans). By the way, lettice can be infected by many brassicas pathogens. Potato probably has unique chemical composition toxic for xanthomonads.
My view is that artificial inoculations often bypass important resistance mechnanisms which ensure that Xanthomonas sp. are fairly specific in their hosts.
Artificial inoculations give false results that do not reflect epidemiological competence.
Mark, sure, we will apply low dose spraying in wet chamber at different temperatures. I was well-trained in plant inoculation methods as a part of plant disease epidemics modelling at Soviet time :)))
Mark, Alex, I think that artificial inoculations can help in understanding genetic responses and not epidemiology
i agree with mark, additionally unlike Pseudomonads and pectobacterium the xanthomonas have less pectyolytic activity and compratively more cellulytic activity which make them less adaptive to potato while as bacteria like Erwinia can infect all vegetables including fleshy brassicas. as far as inoculation is concerned all these bacteria cn enter through wounds but it is the colonizing capacity that defines the host to any pathogen
@Khurshid
I have just found that some Pseudomonas syringae pv. syringae (?) were isolated from potato plants. We have strains of Pss from potato tubers, but believed that it was a rare case. Do you think that it is due to pectolytic activity, which is absent in in Ps according to LOPAT? Actually, it can be P. viridiflava, which is in Ps group as well...
Article RNA-Seq of potato plants reveals a complex of new latent bac...
Maybe, this is an answer...
- Badges
- Science topic
- Similar topics
- Agricultural Science
- Agronomy