Abstract
Forty yeast strains isolated from soils taken from different locations in Egypt were tested for their P-solubilizing activities on the basis of analyzing the clear zone around colonies growing on a tricalcium phosphate medium after incubation for 5 days at 25degreesC, denoted as the solubilization index (SI). Nine isolates that exhibited P-solubilization potential with an SI ranging from 1.19 to 2.76 were genetically characterized as five yeasts belonging to the genus Saccharomyces cerevisiae and four non-Saccharomyces, based on a PCR analysis of the ITS1-26S region amplied by SC1/SC2 species-specific primers. The highest Psolubilization efficiency was demonstrated by isolate PSY- 4, which was identified as Saccharomyces cerevisiae by a sequence analysis of the variable D1/D2 domain of the 26S rDNA. The effects of single and mixed inoculations with yeast PSY-4 and Bacillus polymyxa on the P-uptake and growth of corn were tested in a greenhouse experiment using different levels of a phosphorus chemical fertilizer (50, 100, and 200 kg/ha super phosphate 15.5% P2O5). The results showed that inoculating the corn with yeast PSY-4 or B. polymyxa caused significant increases in the shoot and root dry weights and P-uptake in the shoots and roots. The P-fertilization level also had a significant influence on the shoot and root dry weights and P-uptake in the shoots and roots when increasing the P-level from 50 up to 200 kg/ha. Dual inoculation with yeast strain PSY-4 and B. polymyxa at a P-fertilization level of 200 kg/ha gave higher values for the shoot and root dry weights and P-uptake in the shoots and roots, yet these increases were nonsignificant when compared with dual inoculation with yeast strain PSY-4 and B. polymyxa at a P-fertilization level of 100 kg/ha. The best increases were obtained from dual inoculation with yeast strain PSY-4 and B. polymyxa at a P-fertilization level of 100 kg/ha, which induced the following percentage increases in the shoot and root dry weights, and P-uptake in the shoots and roots; 16.22%, 46.92%, 10.09%, and 31.07%, respectively, when compared with the uninoculated control (fertilized with 100 kg/ha).
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Claims 11
Claim · model-written summary
Inoculating corn with yeast PSY-4 significantly increases shoot and root dry weights and P-uptake in the shoots and roots.
- Taxon
- corn
Zea mays subsp. mayst0 - Treatment
- inoculating the corn with yeast PSY-4e1
- Interactor
- yeast PSY-4e1symbiont
- Outcome
- shoot and root dry weights and P-uptake in the shoots and rootse1
- Direction
- increasese1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The results showed that inoculating the corn with yeast PSY-4 or B. polymyxa caused significant increases in the shoot and root dry weights and P-uptake in the shoots and roots.”
t0“Growth Promotion of Corn Plants”
Claim · model-written summary
Inoculating corn with B. polymyxa significantly increases shoot and root dry weights and P-uptake in the shoots and roots.
- Taxon
- cornZea mays subsp. mayst0
- Treatment
- B. polymyxae1
- Interactor
- B. polymyxa
Paenibacillus polymyxae1symbiont - Outcome
- shoot and root dry weights and P-uptake in the shoots and rootse1
- Direction
- increasese1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The results showed that inoculating the corn with yeast PSY-4 or B. polymyxa caused significant increases in the shoot and root dry weights and P-uptake in the shoots and roots.”
t0“Growth Promotion of Corn Plants”
Claim · model-written summary
Nine of the forty yeast isolates from Egyptian soils show P-solubilization potential, with a solubilization index of 1.19 to 2.76.
- Taxon
- cornZea mays subsp. mayst0
- Outcome
- P-solubilization potentiale1
- Value
- 1.19 to 2.76e1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Nine isolates that exhibited P-solubilization potential with an SI ranging from 1.19 to 2.76”
t0“Growth Promotion of Corn Plants”
Claim · model-written summary
Isolate PSY- 4 has the highest P-solubilization efficiency among the tested isolates.
- Taxon
- cornZea mays subsp. mayst0
- Interactor
- isolate PSY- 4e1other
- Outcome
- Psolubilization efficiencye1
- Direction
- higheste1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The highest Psolubilization efficiency was demonstrated by isolate PSY- 4”
t0“Growth Promotion of Corn Plants”
Claim · model-written summary
The nine solubilizing isolates comprise five Saccharomyces cerevisiae and four non-Saccharomyces yeasts.
- Taxon
- cornZea mays subsp. mayst0
- Outcome
- five yeasts belonging to the genus Saccharomyces cerevisiaee1
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“five yeasts belonging to the genus Saccharomyces cerevisiae and four non-Saccharomyces”
t0“Growth Promotion of Corn Plants”
Claim · model-written summary
Dual inoculation at 100 kg/ha P increases shoot dry weight by 16.22% compared with the uninoculated control.
- Taxon
- cornZea mays subsp. mayst0
- Treatment
- dual inoculation with yeast strain PSY-4 and B. polymyxa at a P-fertilization level of 100 kg/hae1
- Interactor
- yeast strain PSY-4e1symbiont
- Second interactor
- B. polymyxaPaenibacillus polymyxae1symbiont
- Outcome
- shoot and root dry weightse1
- Direction
- increasese1
- Value
- 16.22%e1
- Qualifier
- shoote1
- Comparator
- uninoculated controle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The best increases were obtained from dual inoculation with yeast strain PSY-4 and B. polymyxa at a P-fertilization level of 100 kg/ha, which induced the following percentage increases in the shoot and root dry weights, and P-uptake in the shoots and roots; 16.22%, 46.92%, 10.09%, and 31.07%, respectively, when compared with the uninoculated control (fertilized with 100 kg/ha).”
t0“Growth Promotion of Corn Plants”
Claim · model-written summary
Dual inoculation at 100 kg/ha P increases root dry weight by 46.92% compared with the uninoculated control.
- Taxon
- cornZea mays subsp. mayst0
- Treatment
- dual inoculation with yeast strain PSY-4 and B. polymyxa at a P-fertilization level of 100 kg/hae1
- Interactor
- yeast strain PSY-4e1symbiont
- Second interactor
- B. polymyxaPaenibacillus polymyxae1symbiont
- Outcome
- shoot and root dry weightse1
- Direction
- increasese1
- Value
- 46.92%e1
- Qualifier
- roote1
- Comparator
- uninoculated controle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The best increases were obtained from dual inoculation with yeast strain PSY-4 and B. polymyxa at a P-fertilization level of 100 kg/ha, which induced the following percentage increases in the shoot and root dry weights, and P-uptake in the shoots and roots; 16.22%, 46.92%, 10.09%, and 31.07%, respectively, when compared with the uninoculated control (fertilized with 100 kg/ha).”
t0“Growth Promotion of Corn Plants”
Claim · model-written summary
Dual inoculation at 100 kg/ha P increases shoot P-uptake by 10.09% compared with the uninoculated control.
- Taxon
- cornZea mays subsp. mayst0
- Treatment
- dual inoculation with yeast strain PSY-4 and B. polymyxa at a P-fertilization level of 100 kg/hae1
- Interactor
- yeast strain PSY-4e1symbiont
- Second interactor
- B. polymyxaPaenibacillus polymyxae1symbiont
- Outcome
- P-uptake in the shoots and rootse1
- Direction
- increasese1
- Value
- 10.09%e1
- Qualifier
- shootse1
- Comparator
- uninoculated controle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The best increases were obtained from dual inoculation with yeast strain PSY-4 and B. polymyxa at a P-fertilization level of 100 kg/ha, which induced the following percentage increases in the shoot and root dry weights, and P-uptake in the shoots and roots; 16.22%, 46.92%, 10.09%, and 31.07%, respectively, when compared with the uninoculated control (fertilized with 100 kg/ha).”
t0“Growth Promotion of Corn Plants”
Claim · model-written summary
Dual inoculation at 100 kg/ha P increases root P-uptake by 31.07% compared with the uninoculated control.
- Taxon
- cornZea mays subsp. mayst0
- Treatment
- dual inoculation with yeast strain PSY-4 and B. polymyxa at a P-fertilization level of 100 kg/hae1
- Interactor
- yeast strain PSY-4e1symbiont
- Second interactor
- B. polymyxaPaenibacillus polymyxae1symbiont
- Outcome
- P-uptake in the shoots and rootse1
- Direction
- increasese1
- Value
- 31.07%e1
- Qualifier
- rootse1
- Comparator
- uninoculated controle1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The best increases were obtained from dual inoculation with yeast strain PSY-4 and B. polymyxa at a P-fertilization level of 100 kg/ha, which induced the following percentage increases in the shoot and root dry weights, and P-uptake in the shoots and roots; 16.22%, 46.92%, 10.09%, and 31.07%, respectively, when compared with the uninoculated control (fertilized with 100 kg/ha).”
t0“Growth Promotion of Corn Plants”
Claim · model-written summary
Dual inoculation at 200 kg/ha P gives higher shoot and root dry weights and P-uptake than at 100 kg/ha, but the difference is not significant.
- Taxon
- cornZea mays subsp. mayst0
- Treatment
- Dual inoculation with yeast strain PSY-4 and B. polymyxa at a P-fertilization level of 200 kg/hae1
- Interactor
- yeast strain PSY-4e1symbiont
- Second interactor
- B. polymyxaPaenibacillus polymyxae1symbiont
- Outcome
- shoot and root dry weights and P-uptake in the shoots and rootse1
- Direction
- highere1
- Comparator
- dual inoculation with yeast strain PSY-4 and B. polymyxa at a P-fertilization level of 100 kg/hae1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Dual inoculation with yeast strain PSY-4 and B. polymyxa at a P-fertilization level of 200 kg/ha gave higher values for the shoot and root dry weights and P-uptake in the shoots and roots, yet these increases were nonsignificant when compared with dual inoculation with yeast strain PSY-4 and B. polymyxa at a P-fertilization level of 100 kg/ha.”
t0“Growth Promotion of Corn Plants”
Claim · model-written summary
The P fertilization level significantly influences shoot and root dry weights and P-uptake when raised from 50 to 200 kg/ha.
- Taxon
- cornZea mays subsp. mayst0
- Treatment
- P-fertilization levele1
- Outcome
- shoot and root dry weights and P-uptake in the shoots and rootse1
- Qualifier
- when increasing the P-level from 50 up to 200 kg/hae1
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The P-fertilization level also had a significant influence on the shoot and root dry weights and P-uptake in the shoots and roots when increasing the P-level from 50 up to 200 kg/ha.”
t0“Growth Promotion of Corn Plants”
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