Abstract
The bacterial disease of castor in the Sudan has been reinvestigated. Typically the disease symptoms are brown or black, round or angular lesions on leaves; occasionally the thin succulent branches are attacked, but not the vascular tissue. The bacterium responsible for the disease was previously thought to be Pseudomonas solanacearum E.F.Sm. but comparative studies show that the Sudan species differs in pathogenicity and physiology from P. solanacearum. It closely resembles Xanthomonas ricinicola (Elliott) Dowson (= Bacterium ricini Yoshi and Takimoto) in characters, host range and pathogenic effects. In culture on solid media the growth of X. ricinicola is typically yellow, while that of the Sudan species is dirty white; but this difference is not considered sufficient to justify the establishment of a new species. The author proposes the specific name ricini originally adopted by Archibald (1927) and Yoshi & Takimoto (1928), for the species of Xanthomonas causing the leaf blight disease of castor, and considers that the causal organism in the Sudan is an atypical strain of this species.
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Claims 5
Claim · model-written summary
Castor bacterial leaf blight shows brown or black, round or angular lesions on leaves.
- Taxon
- RICINUS COMMUNIS
Ricinus communist0 - Organ / stage
- leavese1
- Outcome
- disease symptomse1
- Qualifier
- brown or black, round or angular lesionse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“CASTOR (RICINUS COMMUNIS L.)”
e1“Typically the disease symptoms are brown or black, round or angular lesions on leaves”
Claim · model-written summary
The Sudan castor pathogen closely resembles Xanthomonas ricinicola in characters, host range and pathogenic effects.
- Taxon
- RICINUS COMMUNISRicinus communist0
- Interactor
- Xanthomonas ricinicolae2pathogen
- Outcome
- characters, host range and pathogenic effectse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“CASTOR (RICINUS COMMUNIS L.)”
e2“It closely resembles Xanthomonas ricinicola (Elliott) Dowson (= Bacterium ricini Yoshi and Takimoto) in characters, host range and pathogenic effects”
Claim · model-written summary
The Sudan castor pathogen differs in pathogenicity and physiology from Pseudomonas solanacearum.
- Taxon
- RICINUS COMMUNISRicinus communist0
- Interactor
- P. solanacearume3other
- Outcome
- pathogenicity and physiologye3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“CASTOR (RICINUS COMMUNIS L.)”
e3“comparative studies show that the Sudan species differs in pathogenicity and physiology from P. solanacearum”
Claim · model-written summary
On solid media the Sudan castor pathogen grows dirty white, whereas X. ricinicola grows typically yellow.
- Taxon
- RICINUS COMMUNISRicinus communist0
- Interactor
- X. ricinicolae4pathogen
- Outcome
- growthe4
- Qualifier
- typically yellow, while that of the Sudan species is dirty whitee4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“CASTOR (RICINUS COMMUNIS L.)”
e4“In culture on solid media the growth of X. ricinicola is typically yellow, while that of the Sudan species is dirty white”
Claim · model-written summary
The Sudan castor leaf blight causal organism is an atypical strain of Xanthomonas ricinicola, under the proposed name ricini.
- Taxon
- RICINUS COMMUNISRicinus communist0
- Material
- specific name ricinie5
- Outcome
- causal organisme5
- Qualifier
- atypical strain of this speciese5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“CASTOR (RICINUS COMMUNIS L.)”
e5“The author proposes the specific name ricini originally adopted by Archibald (1927) and Yoshi & Takimoto (1928), for the species of Xanthomonas causing the leaf blight disease of castor, and considers that the causal organism in the Sudan is an atypical strain of this species”