Abstract
Ability of watermelon endophytic bacteria to suppress development of leaf spot disease caused by Colletotrichum sp. A studi on assay of endophytic bacteria to control Colletotrichum sp., causal agent of leaf spot disease on watermelon, was conducted. Colletotrichum sp. was isolated from infected leaf of leaf spot disease, while endophytic bacteria were isolated from stem, leaf, and root of watermelon healthy plant. Antagonistic assay was conducted by dual culture method. Hyphal abnormalities as a result of antagonistic assay was observed using light microscope. To determine the ability of endophytic bacterial isolates to control leaf spot disease, watermelon seeds were treated by dipping the seed in endophytic bacterial suspension. Seven endophytic bacterial isolates showed to inhibit Colletotrichum sp. to some extent. Two isolates DS 01 and BS 01 showed relatively high inhibition zone compared to others, therefore were choosen for further study. Abnormal hyphae such as broken, lysis, twisted, curled, and swollen hyphae were recorded as the result of antagonistic assay. Watermelon seed treatment revealed that dipping the seed in endophytic bacterial suspension of DS 01 and BS 01 reduced leaf spot disease to 12 and 24%, but inhibited seed growth by 12% and 44%, respectively. It seemed that all treatments showed to reduce seedling performance i.e seedling height, leaf number, and dry weight, compared to that of (-) control. DS 01 however seemed to increase dry weight of watermelon plants.
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Claims 10
Claim · model-written summary
Seven endophytic bacterial isolates inhibited Colletotrichum sp. to some extent in dual culture.
- Taxon
- watermelon
Citrullus lanatuse0 - Interactor
- Colletotrichum sp.
Colletotrichume0pathogen - Second interactor
- endophytic bacterial isolatese1biocontrol_agent
- Outcome
- inhibit Colletotrichum sp.e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A studi on assay of endophytic bacteria to control Colletotrichum sp., causal agent of leaf spot disease on watermelon, was conducted”
e1“Seven endophytic bacterial isolates showed to inhibit Colletotrichum sp. to some extent”
Claim · model-written summary
Isolates DS 01 and BS 01 showed a relatively high inhibition zone compared with the others.
- Taxon
- watermelonCitrullus lanatuse0
- Material
- DS 01 and BS 01e2
- Outcome
- inhibition zonee2
- Direction
- highe2
- Comparator
- otherse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A studi on assay of endophytic bacteria to control Colletotrichum sp., causal agent of leaf spot disease on watermelon, was conducted”
e2“Two isolates DS 01 and BS 01 showed relatively high inhibition zone compared to others”
Claim · model-written summary
Antagonistic assay produced broken, lysed and twisted Colletotrichum hyphae.
- Taxon
- watermelonCitrullus lanatuse0
- Treatment
- antagonistic assaye3
- Interactor
- Colletotrichum sp.Colletotrichume0pathogen
- Outcome
- broken, lysis, twistede3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A studi on assay of endophytic bacteria to control Colletotrichum sp., causal agent of leaf spot disease on watermelon, was conducted”
e3“Abnormal hyphae such as broken, lysis, twisted, curled, and swollen hyphae were recorded as the result of antagonistic assay”
Claim · model-written summary
Antagonistic assay produced curled and swollen Colletotrichum hyphae.
- Taxon
- watermelonCitrullus lanatuse0
- Treatment
- antagonistic assaye3
- Interactor
- Colletotrichum sp.Colletotrichume0pathogen
- Outcome
- curled, and swollen hyphaee3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A studi on assay of endophytic bacteria to control Colletotrichum sp., causal agent of leaf spot disease on watermelon, was conducted”
e3“Abnormal hyphae such as broken, lysis, twisted, curled, and swollen hyphae were recorded as the result of antagonistic assay”
Claim · model-written summary
Seed dipping in the DS 01 suspension reduced leaf spot disease to 12.
- Taxon
- watermelonCitrullus lanatuse0
- Material
- DS 01e4
- Treatment
- dipping the seed in endophytic bacterial suspension of DS 01e4
- Interactor
- Colletotrichum sp.Colletotrichume0pathogen
- Outcome
- leaf spot diseasee4
- Direction
- reducede4
- Value
- 12e4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A studi on assay of endophytic bacteria to control Colletotrichum sp., causal agent of leaf spot disease on watermelon, was conducted”
e4“Watermelon seed treatment revealed that dipping the seed in endophytic bacterial suspension of DS 01 and BS 01 reduced leaf spot disease to 12 and 24%, but inhibited seed growth by 12% and 44%, respectively”
Claim · model-written summary
Seed dipping in the BS 01 suspension reduced leaf spot disease to 24%.
- Taxon
- watermelonCitrullus lanatuse0
- Material
- BS 01e4
- Treatment
- dipping the seed in endophytic bacterial suspension of DS 01 and BS 01e4
- Interactor
- Colletotrichum sp.Colletotrichume0pathogen
- Outcome
- leaf spot diseasee4
- Direction
- reducede4
- Value
- 24%e4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A studi on assay of endophytic bacteria to control Colletotrichum sp., causal agent of leaf spot disease on watermelon, was conducted”
e4“Watermelon seed treatment revealed that dipping the seed in endophytic bacterial suspension of DS 01 and BS 01 reduced leaf spot disease to 12 and 24%, but inhibited seed growth by 12% and 44%, respectively”
Claim · model-written summary
Seed dipping in the DS 01 suspension inhibited seed growth by 12%.
- Taxon
- watermelonCitrullus lanatuse0
- Material
- DS 01e4
- Treatment
- dipping the seed in endophytic bacterial suspension of DS 01e4
- Outcome
- seed growthe4
- Direction
- inhibitede4
- Value
- 12%e4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A studi on assay of endophytic bacteria to control Colletotrichum sp., causal agent of leaf spot disease on watermelon, was conducted”
e4“Watermelon seed treatment revealed that dipping the seed in endophytic bacterial suspension of DS 01 and BS 01 reduced leaf spot disease to 12 and 24%, but inhibited seed growth by 12% and 44%, respectively”
Claim · model-written summary
Seed dipping in the BS 01 suspension inhibited seed growth by 44%.
- Taxon
- watermelonCitrullus lanatuse0
- Material
- BS 01e4
- Treatment
- dipping the seed in endophytic bacterial suspension of DS 01 and BS 01e4
- Outcome
- seed growthe4
- Direction
- inhibitede4
- Value
- 44%e4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A studi on assay of endophytic bacteria to control Colletotrichum sp., causal agent of leaf spot disease on watermelon, was conducted”
e4“Watermelon seed treatment revealed that dipping the seed in endophytic bacterial suspension of DS 01 and BS 01 reduced leaf spot disease to 12 and 24%, but inhibited seed growth by 12% and 44%, respectively”
Claim · model-written summary
All treatments reduced seedling height, leaf number and dry weight compared with the negative control.
- Taxon
- watermelonCitrullus lanatuse0
- Treatment
- all treatmentse5
- Outcome
- seedling height, leaf number, and dry weighte5
- Direction
- reducee5
- Comparator
- (-) controle5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A studi on assay of endophytic bacteria to control Colletotrichum sp., causal agent of leaf spot disease on watermelon, was conducted”
e5“It seemed that all treatments showed to reduce seedling performance i.e seedling height, leaf number, and dry weight, compared to that of (-) control”
Claim · model-written summary
DS 01 seemed to increase dry weight of watermelon plants compared with the negative control.
- Taxon
- watermelonCitrullus lanatuse0
- Treatment
- DS 01e6
- Outcome
- dry weighte6
- Direction
- increasee6
- Qualifier
- seemede6
- Comparator
- (-) controle5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A studi on assay of endophytic bacteria to control Colletotrichum sp., causal agent of leaf spot disease on watermelon, was conducted”
e5“It seemed that all treatments showed to reduce seedling performance i.e seedling height, leaf number, and dry weight, compared to that of (-) control”
e6“DS 01 however seemed to increase dry weight of watermelon plants”
The same questions in other papers
application · growth · Citrullus lanatus (watermelon)Positive and negative results
2 papers in the same direction as this paper · 13 in the opposite direction
- positive
- positive
- positive
12 papers more in this group
See all 16 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.