Abstract
Root-rotted samples of grapevine cv. superior were collected from Nobaria province, Beheira Governorate, Egypt. Fusarium oxysporum Schlech. was the most fungal causing root-rot syndrome of grapevine and directly affected the yield productivity. Seven isolates of Streptomyces were isolated from grapevine rhizospheric soil and screened for antagonistic activities against F. oxysporum on dual culture plate. All isolates showed antifungal activity, but isolate No. 1 exhibited the highest activity. It was identified as Streptomyces alni according to morphological, cultural, physiological and biochemical studies. The properties of the antagonism were revealed by scanning electron microscopy (SEM) examination of F. oxysporum and S. alni on PDA medium. The forms of antagonism found in this study according to the interaction between the S. alni and the pathogen indicated a hyperparasite, including inhibition of fungal growth and colonisation of S. alni over F. oxysporum hyphae. Also, malformation and lysis of F. oxysporum hyphae and conidiophores were observed. Conidia and normal branches of fungal hyphae were absent. Greenhouse and field studies were performed to evaluate the ability of S. alni and some commercial biofertilisers incorporated into the soil for root-rot control. Pot trails indicated that antagonistic S. alni isolate and biofertilisers i.e. blue green algae, phosphoren and rhizobacterin reduced the root-rot incidence of grapevine plants Cv. superior. Soil treatment before sowing with 50 ml of S. alni suspension (1 × 108 spore/ml) + 50 g of rhizobacterin for each pot was the best and significant treatment reduced root-rot of grapevine plants. Also, the total count of F. oxysporum in rhizosphere soil of grapevine treated plants was reduced compared with control. Under field conditions, drenching soil of diseased grape trees with a spore suspension of S. alni (1 × 108 spore/ml) 200 ml/tree + 250 g/tree of rhizobacterien caused a significant reduction in root rot of treated grapevine trees as well as high fruit yield/tree when compared with other treatments. The obtained results suggest that S. alni could be used successfully in combination with biofertilisers, as environmentally safe, for controlling root-rot of grapevine and other soil-borne plant pathogens especially with organic farming systems.
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Claims 14
Claim · model-written summary
Fusarium oxysporum was the most common fungal cause of grapevine root rot and affected yield.
- Interactor
- Fusarium oxysporum Schlech.
_(Fusarium_oxysporum_f.sp._batatas)_1234227-PPT-Clemson_University.jpg?width=60)
Fusarium oxysporume0pathogen - Outcome
- root-rot syndrome of grapevinee0
VitisOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
_(Fusarium_oxysporum_f.sp._batatas)_1234227-PPT-Clemson_University.jpg?width=500)
Verbatim
e0“Fusarium oxysporum Schlech. was the most fungal causing root-rot syndrome of grapevine and directly affected the yield productivity.”
Claim · model-written summary
All seven Streptomyces isolates had antifungal activity against F. oxysporum.
- Interactor
- F. oxysporumFusarium oxysporume0pathogen
- Second interactor
- Streptomyces
Streptomycese0biocontrol_agent - Outcome
- antifungal activitye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“grapevine”
e0“Seven isolates of Streptomyces were isolated from grapevine rhizospheric soil and screened for antagonistic activities against F. oxysporum on dual culture plate. All isolates showed antifungal activity”
Claim · model-written summary
Streptomyces isolate No. 1 showed the highest antifungal activity.
- Material
- isolate No. 1e0
- Interactor
- StreptomycesStreptomycest1biocontrol_agent
- Outcome
- antifungal activitye0
- Direction
- higheste0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“grapevine”
t1“Streptomyces”
e0“All isolates showed antifungal activity, but isolate No. 1 exhibited the highest activity.”
Claim · model-written summary
Isolate No. 1 was identified as Streptomyces alni.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“grapevine”
e0“It was identified as Streptomyces alni according to morphological, cultural, physiological and biochemical studies.”
Claim · model-written summary
S. alni inhibited F. oxysporum growth and colonized its hyphae in culture.
- Interactor
- F. oxysporumFusarium oxysporume0pathogen
- Second interactor
- S. alnie0biocontrol_agent
- Outcome
- inhibition of fungal growth and colonisation of S. alni over F. oxysporum hyphaee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“grapevine”
e0“inhibition of fungal growth and colonisation of S. alni over F. oxysporum hyphae.”
Claim · model-written summary
F. oxysporum hyphae and conidiophores were malformed and lysed during antagonism.
- Interactor
- F. oxysporumFusarium oxysporume0pathogen
- Outcome
- malformation and lysis of F. oxysporum hyphae and conidiophorese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“grapevine”
e0“malformation and lysis of F. oxysporum hyphae and conidiophores were observed.”
Claim · model-written summary
Fungal conidia and normal hyphal branches were absent.
- Interactor
- F. oxysporumFusarium oxysporume1pathogen
- Outcome
- Conidia and normal branches of fungal hyphae were absente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“grapevine”
e0“Conidia and normal branches of fungal hyphae were absent.”
e1“F. oxysporum hyphae and conidiophores”
Claim · model-written summary
S. alni reduced grapevine root-rot incidence in pots.
- Material
- Cv. superiore0
- Treatment
- antagonistic S. alni isolatee0
- Interactor
- S. alnie0biocontrol_agent
- Outcome
- root-rot incidencee0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pot trails indicated that antagonistic S. alni isolate and biofertilisers i.e. blue green algae, phosphoren and rhizobacterin reduced the root-rot incidence of grapevine plants Cv. superior.”
Claim · model-written summary
Biofertilisers reduced grapevine root-rot incidence in pots.
- Material
- Cv. superiore0
- Treatment
- biofertilisers i.e. blue green algae, phosphoren and rhizobacterine0
- Outcome
- root-rot incidencee0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pot trails indicated that antagonistic S. alni isolate and biofertilisers i.e. blue green algae, phosphoren and rhizobacterin reduced the root-rot incidence of grapevine plants Cv. superior.”
Claim · model-written summary
S. alni suspension combined with rhizobacterin gave the best significant root-rot reduction in pots.
- Treatment
- 50 ml of S. alni suspension (1 × 108 spore/ml) + 50 g of rhizobacterin for each pote0
- Interactor
- S. alnie0biocontrol_agent
- Outcome
- root-rot of grapevine plantse0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“grapevine”
e0“Soil treatment before sowing with 50 ml of S. alni suspension (1 × 108 spore/ml) + 50 g of rhizobacterin for each pot was the best and significant treatment reduced root-rot of grapevine plants.”
Claim · model-written summary
F. oxysporum counts in treated grapevine rhizosphere soil were reduced versus control.
- Treatment
- treated plantse0
- Interactor
- F. oxysporumFusarium oxysporume0pathogen
- Outcome
- total count of F. oxysporum in rhizosphere soile0
- Direction
- reducede0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the total count of F. oxysporum in rhizosphere soil of grapevine treated plants was reduced compared with control.”
Claim · model-written summary
Field soil drenching with S. alni and rhizobacterien significantly reduced grapevine root rot.
Verbatim
e0“Under field conditions, drenching soil of diseased grape trees with a spore suspension of S. alni (1 × 108 spore/ml) 200 ml/tree + 250 g/tree of rhizobacterien caused a significant reduction in root rot of treated grapevine trees as well as high fruit yield/tree when compared with other treatments.”
Claim · model-written summary
Field soil drenching with S. alni and rhizobacterien yielded high fruit yield per tree.
Verbatim
e0“Under field conditions, drenching soil of diseased grape trees with a spore suspension of S. alni (1 × 108 spore/ml) 200 ml/tree + 250 g/tree of rhizobacterien caused a significant reduction in root rot of treated grapevine trees as well as high fruit yield/tree when compared with other treatments.”
Claim · model-written summary
The authors propose S. alni with biofertilisers for grapevine root-rot control.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“S. alni could be used successfully in combination with biofertilisers, as environmentally safe, for controlling root-rot of grapevine and other soil-borne plant pathogens especially with organic farming systems.”
The same questions in other papers
inoculation · disease · VitisPositive and negative results
18 papers in the same direction as this paper · 48 in the opposite direction
- negative
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