Abstract
In the present study, cell-free cultures of four isolates of Rhizobium leguminosarum, an isolate of Azotobacter chroococcum and compost tea were investigated for their biocontrol potential against the root parasitic weed Orobanche crenata. Individual cell-free cultures of Azotobacter chroococcum or Rhizobium sp., dual and mixture of cell-free cultures of Rhizobium spp. or compost tea were applied to infested pots in greenhouse conditions. The treatments showed variable effects on many developmental parameters of both faba bean and broomrape. Significant decrease in the number of broomrape attachments, dry weight of the attached tubercles on faba bean roots and the reduction in percentage of broomrape seed germination were recorded. Compost tea, individual and mixture of R. leguminosarum isolates were more reducing on broomrape germination and growth than A. chroococcum alone did; being the former treatment is the best. The reduction in broomrape incidence by compost tea was due to certain phenotypic mechanisms, which acted alone or in combination. These mechanisms included negative effect of natural stimulant broomrape on seed germination, prevention of radical penetration inside the host roots, parasite yield reduction, and thus increasing the growth and vitality of faba bean. In vitro experiment indicated that seed germination percentage of broomrape was also negatively affected by the combination of root-exudates and compost tea. Radical apexes of the germinated seeds were distorted. These distortions may prevent the radicals to follow up the infestation. In conclusion, the study presents the potential of R. leguminosarum isolates and compost tea in biocontrol of broomrape. More investigations should be carried out with viable bacterial cells on the parasite plant before use in sustainable agricultural systems.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 9
Claim · model-written summary
Treatments decreased broomrape attachments on faba bean.
- Taxon
- faba bean
Vicia fabae0 - Treatment
- treatmentse1
- Interactor
- broomrapee0weed
- Outcome
- number of broomrape attachmentse0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Significant decrease in the number of broomrape attachments, dry weight of the attached tubercles on faba bean roots and the reduction in percentage of broomrape seed germination were recorded.”
t0“The Potential of Cell-free Cultures of Rhizobium leguminosarum, Azotobacter chroococcum and Compost Tea as Biocontrol Agents for Faba Bean Broomrape (Orobanche crenata Forsk.)”
e1“The treatments showed variable effects on many developmental parameters of both faba bean and broomrape.”
Claim · model-written summary
Treatments decreased dry weight of attached broomrape tubercles on faba bean roots.
- Taxon
- faba beanVicia fabae0
- Treatment
- treatmentse1
- Interactor
- broomrapee0weed
- Outcome
- dry weight of the attached tubercles on faba bean rootse0
- Direction
- decreasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Significant decrease in the number of broomrape attachments, dry weight of the attached tubercles on faba bean roots and the reduction in percentage of broomrape seed germination were recorded.”
t0“The Potential of Cell-free Cultures of Rhizobium leguminosarum, Azotobacter chroococcum and Compost Tea as Biocontrol Agents for Faba Bean Broomrape (Orobanche crenata Forsk.)”
e1“The treatments showed variable effects on many developmental parameters of both faba bean and broomrape.”
Claim · model-written summary
Treatments reduced broomrape seed germination.
- Taxon
- Faba BeanVicia fabat0
- Treatment
- Compost Teat0
- Interactor
- broomrapee0weed
- Outcome
- broomrape seed germinatione0
- Direction
- reductione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the reduction in percentage of broomrape seed germination were recorded.”
t0“The Potential of Cell-free Cultures of Rhizobium leguminosarum, Azotobacter chroococcum and Compost Tea as Biocontrol Agents for Faba Bean Broomrape (Orobanche crenata Forsk.)”
Claim · model-written summary
Compost tea reduced broomrape germination and growth more than A. chroococcum alone.
- Taxon
- Faba BeanVicia fabat0
- Treatment
- Compost teae0
- Interactor
- broomrapee0weed
- Outcome
- broomrape germination and growthe0
- Direction
- more reducinge0
- Comparator
- A. chroococcum alonee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compost tea, individual and mixture of R. leguminosarum isolates were more reducing on broomrape germination and growth than A. chroococcum alone did; being the former treatment is the best.”
t0“Faba Bean Broomrape”
Claim · model-written summary
R. leguminosarum isolates reduced broomrape germination and growth more than A. chroococcum alone.
- Taxon
- Faba BeanVicia fabat0
- Treatment
- individual and mixture of R. leguminosarum isolatese0
- Interactor
- broomrapee0weed
- Second interactor
- R. leguminosarum
Rhizobium leguminosarume0biocontrol_agent - Outcome
- broomrape germination and growthe0
- Direction
- more reducinge0
- Comparator
- A. chroococcum alonee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compost tea, individual and mixture of R. leguminosarum isolates were more reducing on broomrape germination and growth than A. chroococcum alone did; being the former treatment is the best.”
t0“Faba Bean Broomrape”
Claim · model-written summary
Compost tea increased faba bean growth and vitality by reducing broomrape incidence.
- Taxon
- faba beanVicia fabae0
- Interactor
- parasitee0weed
- Outcome
- growth and vitality of faba beane0
- Qualifier
- parasite yield reductione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“parasite yield reduction, and thus increasing the growth and vitality of faba bean.”
Claim · model-written summary
Root exudates combined with compost tea reduced broomrape seed germination in vitro.
- Taxon
- Faba BeanVicia fabat0
- Treatment
- combination of root-exudates and compost teae0
- Interactor
- broomrapee0weed
- Outcome
- seed germination percentage of broomrapee0
- Direction
- negatively affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“seed germination percentage of broomrape was also negatively affected by the combination of root-exudates and compost tea.”
t0“Faba Bean Broomrape”
Claim · model-written summary
Germinated broomrape seeds had distorted radicle apices.
- Taxon
- Faba BeanVicia fabat0
- Outcome
- Radical apexes of the germinated seeds were distortede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Radical apexes of the germinated seeds were distorted.”
t0“Faba Bean Broomrape”
Claim · model-written summary
The authors recommend further investigation of viable bacterial cells before agricultural use.
- Taxon
- Faba BeanVicia fabat0
- Outcome
- More investigations should be carried out with viable bacterial cells on the parasite plante0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“More investigations should be carried out with viable bacterial cells on the parasite plant before use in sustainable agricultural systems.”
t0“Faba Bean Broomrape”
The same questions in other papers
Rhizobium leguminosarum · growth · Vicia faba (faba bean)Results agree
4 papers in the same direction as this paper
- positive
- positive
- positive
1 paper more in this group
See all 5 papers →allelopathy · growth · Vicia faba (faba bean)Positive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- negative
- positive
fertilization · growth · Vicia faba (faba bean)Positive and negative results
66 papers in the same direction as this paper · 6 in the opposite direction
- negative
- no effect
- no effect
69 papers more in this group
See all 73 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.