Abstract
Bacterial leaf streak symptoms on wheat are elongated translucent, water- soaked lesions were observed in five farms in Al-Karj region, Riyadh, Saudi Arabia Physiological characters of three isolates obtained from naturally diseases wheat plants confirmed as Xanthomonas translucens pv. translucens Isolates (i.e.XW1,XW2 and XW3). They characterized as Gram negative, short rod-cell with yellow- pigmented colonies tests which were positive were: motility, esculin hydrolysis, hypersensitivity on tobacco and utilizing arabinose and mannose. Tests which were negative were: Kovacs' oxidase, arginine dihydrolases, nitrate reduction and starch hydrolyse. Furthermore, the identification was confirmed by using Biolog system. Pathogenicty tests revealed that all isolates were able to induce leaf streak and black chaff symptoms when the bacterial suspension (108CFU) At inoculums density lower than 105 CFU/ml, no visible lesions were observed on the leaves segments after 14 days from inoculation. At inoculums concentrations higher than 106 CFU/ml, the number of lesions did not increase significantly with the increase in inoculum concentration. Greenhouse tests showed that cultivar Yocora rojo was susceptible to bacterial streak and black chaff. Yield loss was recorded 11.60 % compared with the other cultivars.
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Claims 8
Claim · model-written summary
Bacterial leaf streak lesions were seen on wheat on five farms.
- Taxon
- wheat
Triticum aestivume0 - Outcome
- elongated translucent, water- soaked lesionse0
- Setting
- Al-Karj region, Riyadh, Saudi Arabiae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Bacterial leaf streak symptoms on wheat are elongated translucent, water- soaked lesions were observed in five farms in Al-Karj region, Riyadh, Saudi Arabia”
Claim · model-written summary
The three wheat isolates were identified as Xanthomonas translucens pv. translucens by physiology and Biolog.
- Taxon
- wheatTriticum aestivume0
- Interactor
- Xanthomonas translucens pv. translucens
Xanthomonas translucens pv. translucense0pathogen - Outcome
- confirmed as Xanthomonas translucens pv. translucense0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Physiological characters of three isolates obtained from naturally diseases wheat plants confirmed as Xanthomonas translucens pv. translucens Isolates (i.e.XW1,XW2 and XW3)”
e1“the identification was confirmed by using Biolog system”
Claim · model-written summary
The pathogen isolates were Gram negative short rods with yellow colonies and the reported biochemical profile.
- Taxon
- wheatTriticum aestivume1
- Interactor
- Xanthomonas translucens pv. translucensXanthomonas translucens pv. translucense1pathogen
- Outcome
- Gram negative, short rod-cell with yellow- pigmented coloniese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“They characterized as Gram negative, short rod-cell with yellow- pigmented colonies tests which were positive were: motility, esculin hydrolysis, hypersensitivity on tobacco and utilizing arabinose and mannose. Tests which were negative were: Kovacs' oxidase, arginine dihydrolases, nitrate reduction and starch hydrolyse.”
e1“wheat plants confirmed as Xanthomonas translucens pv. translucens”
Claim · model-written summary
All isolates induced leaf streak and black chaff after inoculation.
- Taxon
- wheatTriticum aestivume1
- Treatment
- bacterial suspension (108CFU)e0
- Interactor
- Xanthomonas translucens pv. translucensXanthomonas translucens pv. translucense1pathogen
- Outcome
- leaf streak and black chaff symptomse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“all isolates were able to induce leaf streak and black chaff symptoms when the bacterial suspension (108CFU)”
e1“wheat plants confirmed as Xanthomonas translucens pv. translucens”
Claim · model-written summary
Inoculum below 105 CFU/ml produced no visible leaf lesions after 14 days.
- Taxon
- wheatTriticum aestivume1
- Treatment
- inoculums density lower than 105 CFU/mle0
- Interactor
- Xanthomonas translucens pv. translucensXanthomonas translucens pv. translucense1pathogen
- Outcome
- no visible lesionse0
- Qualifier
- after 14 days from inoculatione0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At inoculums density lower than 105 CFU/ml, no visible lesions were observed on the leaves segments after 14 days from inoculation”
e1“wheat plants confirmed as Xanthomonas translucens pv. translucens”
Claim · model-written summary
Lesion number did not increase significantly above 106 CFU/ml.
- Taxon
- wheatTriticum aestivume1
- Treatment
- inoculums concentrations higher than 106 CFU/mle0
- Interactor
- Xanthomonas translucens pv. translucensXanthomonas translucens pv. translucense1pathogen
- Outcome
- number of lesionse0
- Direction
- did not increasee0
- Comparator
- increase in inoculum concentratione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“At inoculums concentrations higher than 106 CFU/ml, the number of lesions did not increase significantly with the increase in inoculum concentration”
e1“wheat plants confirmed as Xanthomonas translucens pv. translucens”
Claim · model-written summary
Yocora rojo was susceptible to bacterial streak and black chaff in greenhouse tests.
- Taxon
- wheatTriticum aestivume1
- Material
- Yocora rojoe0
- Interactor
- Xanthomonas translucens pv. translucensXanthomonas translucens pv. translucense1pathogen
- Outcome
- susceptible to bacterial streak and black chaffe0
- Setting
- Greenhousee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Greenhouse tests showed that cultivar Yocora rojo was susceptible to bacterial streak and black chaff”
e1“wheat plants confirmed as Xanthomonas translucens pv. translucens”
Claim · model-written summary
The reported yield loss was 11.60% relative to other cultivars.
- Taxon
- wheatTriticum aestivume1
- Interactor
- Xanthomonas translucens pv. translucensXanthomonas translucens pv. translucense1pathogen
- Outcome
- Yield losse0
- Direction
- losse0
- Value
- 11.60 %e0
- Comparator
- the other cultivarse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Yield loss was recorded 11.60 % compared with the other cultivars”
e1“wheat plants confirmed as Xanthomonas translucens pv. translucens”