Abstract
The angular leaf spot disease caused by Xanthomonas fragariae is an important plant disease with major impact for the strawberry nursery industry. Currently there is no plant protection product available for controlling the disease effectively. Planting of resistant cultivars seems to be promising, but all commercially used cultivars are susceptible and no donor with a high level of resistance has yet been found. Therefore, a total of 145 genotypes from the Fruit Genebank Dresden (Germany) were evaluated for resistance to X. fragariae by artificial inoculation. Six genotypes were classified as partly resistant, out of which only two (US4808 and US4809) are octoploid. Fragaria vesca f. alba , Fragaria nilgerrensis ‘Yunnan’, F. vesca ‘Illa Martin’ and F. moschata ‘Bauwens’ were also classified as partially resistant, but they are only of limited use for breeding because of their variable ploidy level. Fully resistant genotypes could not be detected. The systemic dispersal of the bacteria in strawberry plants was investigated after inoculation of leaves with X. fragariae strain XF3.9.C and the GFP‐tagged strain XF3.9.C (pKAN) . The systemic spread was evaluated after 3, 7, 14 and 28 days post‐inoculation (dpi) by nested PCR and fluorescence microscopy. After 3 dpi, X. fragariae could be found in all tissues tested including the inoculated leaf, its petiole, the rhizome, the heart bud up to the youngest fully expanded leaf and its petiole. The systemic spread was also detectable in partially resistant genotypes.
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Claims 9
Claim · model-written summary
Six strawberry genotypes were partly resistant to X. fragariae.
- Taxon
- strawberry
_single2.jpg?width=60)
Fragaria ×ananassat0 - Interactor
- Xanthomonas fragariaeXanthomonas fragariaet0pathogen
- Outcome
- partly resistante0
- Value
- Six genotypese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_single2.jpg?width=500)
Verbatim
e0“Six genotypes were classified as partly resistant, out of which only two (US4808 and US4809) are octoploid.”
t0“Xanthomonas fragariae in strawberry germplasm”
Claim · model-written summary
US4808 and US4809 were the two octoploid partly resistant genotypes.
- Taxon
- strawberryFragaria ×ananassat0
- Material
- US4808 and US4809e0
- Interactor
- Xanthomonas fragariaeXanthomonas fragariaet0pathogen
- Outcome
- partly resistante0
- Value
- twoe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Six genotypes were classified as partly resistant, out of which only two (US4808 and US4809) are octoploid.”
t0“Xanthomonas fragariae in strawberry germplasm”
Claim · model-written summary
Fragaria vesca f. alba was partially resistant.
- Taxon
- Fragaria vesca
Fragaria vescae0 - Material
- Fragaria vesca f. albae0
- Interactor
- Xanthomonas fragariaeXanthomonas fragariaet0pathogen
- Outcome
- partially resistante0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fragaria vesca f. alba , Fragaria nilgerrensis ‘Yunnan’, F. vesca ‘Illa Martin’ and F. moschata ‘Bauwens’ were also classified as partially resistant”
t0“Xanthomonas fragariae in strawberry germplasm”
Claim · model-written summary
Fragaria nilgerrensis ‘Yunnan’ was partially resistant.
- Taxon
- Fragaria nilgerrensis
Fragaria nilgerrensise0 - Material
- ‘Yunnan’e0
- Interactor
- Xanthomonas fragariaeXanthomonas fragariaet0pathogen
- Outcome
- partially resistante0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fragaria vesca f. alba , Fragaria nilgerrensis ‘Yunnan’, F. vesca ‘Illa Martin’ and F. moschata ‘Bauwens’ were also classified as partially resistant”
t0“Xanthomonas fragariae in strawberry germplasm”
Claim · model-written summary
F. vesca ‘Illa Martin’ was partially resistant.
- Taxon
- F. vescaFragaria vescae0
- Material
- ‘Illa Martin’e0
- Interactor
- Xanthomonas fragariaeXanthomonas fragariaet0pathogen
- Outcome
- partially resistante0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fragaria vesca f. alba , Fragaria nilgerrensis ‘Yunnan’, F. vesca ‘Illa Martin’ and F. moschata ‘Bauwens’ were also classified as partially resistant”
t0“Xanthomonas fragariae in strawberry germplasm”
Claim · model-written summary
F. moschata ‘Bauwens’ was partially resistant.
- Taxon
- F. moschata
Fragaria moschatae0 - Material
- ‘Bauwens’e0
- Interactor
- Xanthomonas fragariaeXanthomonas fragariaet0pathogen
- Outcome
- partially resistante0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fragaria vesca f. alba , Fragaria nilgerrensis ‘Yunnan’, F. vesca ‘Illa Martin’ and F. moschata ‘Bauwens’ were also classified as partially resistant”
t0“Xanthomonas fragariae in strawberry germplasm”
Claim · model-written summary
Fully resistant strawberry genotypes were not detected.
- Taxon
- strawberryFragaria ×ananassat0
- Interactor
- Xanthomonas fragariaeXanthomonas fragariaet0pathogen
- Outcome
- Fully resistant genotypes could not be detectede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Fully resistant genotypes could not be detected.”
t0“Xanthomonas fragariae in strawberry germplasm”
Claim · model-written summary
X. fragariae reached all tested strawberry tissues by 3 dpi.
- Taxon
- strawberryFragaria ×ananassat0
- Organ / stage
- inoculated leaf, its petiole, the rhizome, the heart bud up to the youngest fully expanded leaf and its petiolee0
- Interactor
- X. fragariaeXanthomonas fragariaee0pathogent0
- Outcome
- X. fragariae could be found in all tissues testede0
- Value
- 3 dpie0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“After 3 dpi, X. fragariae could be found in all tissues tested including the inoculated leaf, its petiole, the rhizome, the heart bud up to the youngest fully expanded leaf and its petiole.”
t0“Xanthomonas fragariae in strawberry germplasm”
Claim · model-written summary
Systemic X. fragariae spread occurred in partially resistant strawberry genotypes.
- Taxon
- strawberryFragaria ×ananassat0
- Interactor
- Xanthomonas fragariaeXanthomonas fragariaet0pathogen
- Outcome
- systemic spread was also detectable in partially resistant genotypese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The systemic spread was also detectable in partially resistant genotypes.”
t0“Xanthomonas fragariae in strawberry germplasm”