Abstract
The purpose of this study was to determine the effect of several Pseudomonas isolates obtained from the rhizosphere of corn (Zea mays L.), sorghum (Sorghum bicolor Moench L.) and wheat (Triticum aestivum L.) on the seedling growth of these cereals and on stalk rot and grain yield of corn. Seeds of BoJac 56 and NC 5288 corn hybrids. Asgrow and Pioneer 8272 sorghum hybrids and Parker 76 and Scout wheat cultivars were coated with rhizobacteria (176 isolates) and germinated in nonautoclaved or autoclaved field soils in the greenhouse. The dry weights of cereals seedlings (3 wk old) were not significantly affected by bacterial treatments in the autoclaved soils regardless of plant species. Eight cereal Pseudomonas rhizobacteria increased seedling growth significantly in one or more of corn, sorghum or wheat cultivars in nonautoclaved soils in the greenhouse. The stand density, stalk and root rot incidence and grain yield of two corn hybrids were not improved by coating their seeds with growth-promoting rhizobacteria during 2 yr of field testing. Some isolates actually reduced the stand and grain yield of certain corn hybrids in the field. The effect of each rhizobacterium varied considerably between plant species and between cultivars within the same species. The growth-promoting rhizobacteria differed significantly in their ability to inhibit growth of 14 plant pathogenic bacteria and fungi on agar media.Key words: Biological control, antagonism, Pseudomonas, corn, sorghum, wheat, stalk rot
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Claims 7
Claim · model-written summary
Bacterial treatments did not significantly change cereal seedling dry weights in autoclaved soils.
- Taxon
- CORN, SORGHUM AND WHEATt0
- Treatment
- bacterial treatmentse0
- Outcome
- dry weights of cereals seedlingse0
- Direction
- not significantly affectede0
- Setting
- autoclaved soilse0
Not reportedComparator
Verbatim
e0“The dry weights of cereals seedlings (3 wk old) were not significantly affected by bacterial treatments in the autoclaved soils regardless of plant species”
t0“CORN, SORGHUM AND WHEAT”
Claim · model-written summary
Eight Pseudomonas rhizobacteria significantly increased cereal seedling growth in nonautoclaved greenhouse soils.
- Taxon
- corn, sorghum or wheat
Sorghum
Triticum aestivum
Zea mays subsp. mayse0 - Treatment
- Pseudomonas rhizobacteriae0
- Interactor
- Pseudomonas
Pseudomonase0symbiont - Outcome
- seedling growthe0
- Direction
- increasede0
- Setting
- nonautoclaved soils in the greenhousee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Eight cereal Pseudomonas rhizobacteria increased seedling growth significantly in one or more of corn, sorghum or wheat cultivars in nonautoclaved soils in the greenhouse”
Claim · model-written summary
Seed coating did not improve stand density or stalk and root rot incidence in corn field testing.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- coating their seeds with growth-promoting rhizobacteriae0
- Outcome
- stand density, stalk and root rot incidencee0
- Direction
- not improvede0
- Setting
- field testinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The stand density, stalk and root rot incidence and grain yield of two corn hybrids were not improved by coating their seeds with growth-promoting rhizobacteria during 2 yr of field testing”
Claim · model-written summary
Seed coating did not improve corn grain yield in field testing.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- coating their seeds with growth-promoting rhizobacteriae0
- Outcome
- grain yielde0
- Direction
- not improvede0
- Setting
- field testinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The stand density, stalk and root rot incidence and grain yield of two corn hybrids were not improved by coating their seeds with growth-promoting rhizobacteria during 2 yr of field testing”
Claim · model-written summary
Some isolates reduced corn stand and grain yield in the field.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- Some isolatese0
- Outcome
- stand and grain yielde0
- Direction
- reducede0
- Setting
- fielde0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Some isolates actually reduced the stand and grain yield of certain corn hybrids in the field”
Claim · model-written summary
Rhizobacterium effects varied by plant species and cultivar.
RhizobiumNot reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The effect of each rhizobacterium varied considerably between plant species and between cultivars within the same species”
t0“CORN, SORGHUM AND WHEAT”
Claim · model-written summary
Rhizobacteria differed in inhibition of plant pathogenic bacteria and fungi on agar.
- Taxon
- CORN, SORGHUM AND WHEATt0
- Interactor
- plant pathogenic bacteria and fungie0pathogen
- Second interactor
- rhizobacteriaHyphomicrobialese0biocontrol_agent
- Outcome
- inhibit growth of 14 plant pathogenic bacteria and fungie0
Verbatim
e0“The growth-promoting rhizobacteria differed significantly in their ability to inhibit growth of 14 plant pathogenic bacteria and fungi on agar media”
t0“CORN, SORGHUM AND WHEAT”
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See all 532 papers →8 of 10 groups shown: named compounds and organisms first, then groups whose results differ (checked claim by claim), then those with positive and negative results, then the smaller groups.
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.