Paper · 2020 · Geomicrobiology Journal

Phosphorus and Potassium Solubilization From Rock Minerals by Endophytic Burkholderia sp. Strain FDN2-1 in Soil and Shift in Diversity of Bacterial Endophytes of Corn Root Tissue with Crop Growth Stage

Vikas Baghel; Jyoti Kumar Thakur; Shashi S. Yadav; et al.

19
claims
27
verbatim quotes
61
citations
4
research areas
—
Not open access

Abstract

Exploring diversity of endophytes from cultivated crop offers immense promise for plant growth promotion. Present study evaluated plant growth promoting efficiency, phosphorus, and potassium solubilization by bacterial endophytes of corn root in soil. Out of 24 endophytic isolates from four growth stages, 13 isolates were able to grow on nitrogen free media, 10 could solubilize phosphorus from tricalcium phosphate, and 8 isolates possessed potassium solubilizing ability from glauconite. The isolates also showed siderophore production and antifungal activity. Two isolates FDN-4-6 and FDN2-1 produced Indole acetic acid to the extent of 18.75 µg/ml and 17.47 µg/ml, respectively. The isolate FDN2-1 phylogenticlly related to Burkholderia sp. solubilized rock phosphate (250.43 µg/ml soluble P), tricalcium phosphate (416.13 µg/ml), iron phosphate (49.53 µg/ml), aluminum phosphate (85.23 µg/ml). It could also solubilize potassium from galuconite (52.37 µg/ml soluble K) and muscovite (61.87 µg/ml) in culture broth. Seed inoculation with FDN-2-1 could improve the root length and dry weight of corn seedling. Soil amended with rock phosphate and glauconite upon inoculation of FDN2-1 showed significantly (p < 0.05) higher available phosphorus (39.15 kg/ha in Vertisol and 26.05 kg/ha in Alfisol) and potassium (493 kg/ha in Vertisol and 181 kg/ha in Alfisol) after 90 days of incubation. Most of the isolates obtained from seedling stage (15 days after sowing) formed cluster with isolate obtained at later stages with two additional isolates one each at 40 and 60 days of sowing indicated high genetic similarity between the isolates from different growth stages as detected by amplified ribosomal DNA restriction analysis. The results showed favorable effect of inoculation of endophytic Burkholderia sp. on growth of corn plant and nutrient solubilization potential of the isolate FDN2-1in soil.

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Claims 19

Observationobservedoriginal resultmeasured

Claim · model-written summary

Thirteen of 24 corn endophytic isolates grew on nitrogen-free media.

Interactor
endophytic isolatese0symbiont
Outcome
grow on nitrogen free mediae0
Value
13 isolatese0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Zea mays subsp. mays
Zea mays subsp. mays · TaxonDominicus Johannes Bergsma · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“Out of 24 endophytic isolates from four growth stages, 13 isolates were able to grow on nitrogen free media”

✓ located verbatim in the source · abstract, characters 252–359 · show in text ↑
t0

“corn root tissue”

✓ located after whitespace/quote normalisation · title, characters 162–178 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

Ten corn endophytic isolates solubilized phosphorus from tricalcium phosphate.

Outcome
solubilize phosphorus from tricalcium phosphatee0
Value
10e0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Zea mays subsp. mays
Zea mays subsp. mays · TaxonDominicus Johannes Bergsma · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“10 could solubilize phosphorus from tricalcium phosphate”

✓ located verbatim in the source · abstract, characters 361–417 · show in text ↑
t0

“corn root tissue”

✓ located after whitespace/quote normalisation · title, characters 162–178 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

Eight isolates solubilized potassium from glauconite.

Outcome
potassium solubilizing ability from glauconitee0
Value
8 isolatese0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Zea mays subsp. mays
Zea mays subsp. mays · TaxonDominicus Johannes Bergsma · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“8 isolates possessed potassium solubilizing ability from glauconite”

✓ located verbatim in the source · abstract, characters 423–490 · show in text ↑
t0

“corn root tissue”

✓ located after whitespace/quote normalisation · title, characters 162–178 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

The isolates produced siderophores and showed antifungal activity.

Outcome
siderophore production and antifungal activitye0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Zea mays subsp. mays
Zea mays subsp. mays · TaxonDominicus Johannes Bergsma · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“The isolates also showed siderophore production and antifungal activity.”

✓ located verbatim in the source · abstract, characters 492–564 · show in text ↑
t0

“corn root tissue”

✓ located after whitespace/quote normalisation · title, characters 162–178 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

FDN-4-6 produced 18.75 µg/ml indole acetic acid.

Interactor
FDN-4-6e0symbiont
Outcome
Indole acetic acide0
Value
18.75 µg/mle0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Zea mays subsp. mays
Zea mays subsp. mays · TaxonDominicus Johannes Bergsma · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“Two isolates FDN-4-6 and FDN2-1 produced Indole acetic acid to the extent of 18.75 µg/ml and 17.47 µg/ml, respectively.”

✓ located verbatim in the source · abstract, characters 565–684 · show in text ↑
t0

“corn root tissue”

✓ located after whitespace/quote normalisation · title, characters 162–178 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

FDN2-1 produced 17.47 µg/ml indole acetic acid.

Interactor
FDN2-1e0symbiont
Outcome
Indole acetic acide0
Value
17.47 µg/mle0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Zea mays subsp. mays
Zea mays subsp. mays · TaxonDominicus Johannes Bergsma · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“Two isolates FDN-4-6 and FDN2-1 produced Indole acetic acid to the extent of 18.75 µg/ml and 17.47 µg/ml, respectively.”

✓ located verbatim in the source · abstract, characters 565–684 · show in text ↑
t0

“corn root tissue”

✓ located after whitespace/quote normalisation · title, characters 162–178 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

FDN2-1 was phylogenetically related to Burkholderia sp.

Interactor
FDN2-1e0symbiont
Outcome
phylogenticlly related to Burkholderia sp.e0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Zea mays subsp. mays
Zea mays subsp. mays · TaxonDominicus Johannes Bergsma · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“The isolate FDN2-1 phylogenticlly related to Burkholderia sp.”

✓ located verbatim in the source · abstract, characters 685–746 · show in text ↑
t0

“corn root tissue”

✓ located after whitespace/quote normalisation · title, characters 162–178 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

FDN2-1 solubilized 250.43 µg/ml phosphate from rock phosphate.

Outcome
rock phosphatee0
Value
250.43 µg/ml soluble Pe0

Not reportedTaxon

Verbatim

e0

“solubilized rock phosphate (250.43 µg/ml soluble P), tricalcium phosphate (416.13 µg/ml), iron phosphate (49.53 µg/ml), aluminum phosphate (85.23 µg/ml)”

✓ located verbatim in the source · abstract, characters 747–899 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

FDN2-1 solubilized 416.13 µg/ml phosphate from tricalcium phosphate.

Outcome
tricalcium phosphatee0
Value
416.13 µg/mle0

Not reportedTaxon

Verbatim

e0

“solubilized rock phosphate (250.43 µg/ml soluble P), tricalcium phosphate (416.13 µg/ml), iron phosphate (49.53 µg/ml), aluminum phosphate (85.23 µg/ml)”

✓ located verbatim in the source · abstract, characters 747–899 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

FDN2-1 solubilized 49.53 µg/ml phosphate from iron phosphate.

Outcome
iron phosphatee0
Value
49.53 µg/mle0

Not reportedTaxon

Verbatim

e0

“solubilized rock phosphate (250.43 µg/ml soluble P), tricalcium phosphate (416.13 µg/ml), iron phosphate (49.53 µg/ml), aluminum phosphate (85.23 µg/ml)”

✓ located verbatim in the source · abstract, characters 747–899 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

FDN2-1 solubilized 85.23 µg/ml phosphate from aluminum phosphate.

Outcome
aluminum phosphatee0
Value
85.23 µg/mle0

Not reportedTaxon

Verbatim

e0

“solubilized rock phosphate (250.43 µg/ml soluble P), tricalcium phosphate (416.13 µg/ml), iron phosphate (49.53 µg/ml), aluminum phosphate (85.23 µg/ml)”

✓ located verbatim in the source · abstract, characters 747–899 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

FDN2-1 solubilized 52.37 µg/ml potassium from glauconite.

Outcome
potassium from galuconitee0
Value
52.37 µg/ml soluble Ke0
Setting
culture brothe0

Not reportedTaxon

Verbatim

e0

“It could also solubilize potassium from galuconite (52.37 µg/ml soluble K) and muscovite (61.87 µg/ml) in culture broth.”

✓ located verbatim in the source · abstract, characters 901–1021 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

FDN2-1 solubilized 61.87 µg/ml potassium from muscovite.

Outcome
muscovitee0
Value
61.87 µg/mle0
Setting
culture brothe0

Not reportedTaxon

Verbatim

e0

“It could also solubilize potassium from galuconite (52.37 µg/ml soluble K) and muscovite (61.87 µg/ml) in culture broth.”

✓ located verbatim in the source · abstract, characters 901–1021 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

FDN-2-1 seed inoculation improved corn seedling root length and dry weight.

Treatment
Seed inoculation with FDN-2-1e0
Interactor
FDN-2-1e0symbiont
Outcome
root length and dry weighte0
Direction
improvee0

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Zea mays subsp. mays
Zea mays subsp. mays · TaxonDominicus Johannes Bergsma · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“Seed inoculation with FDN-2-1 could improve the root length and dry weight of corn seedling.”

✓ located verbatim in the source · abstract, characters 1022–1114 · show in text ↑
Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

FDN2-1 inoculation increased available phosphorus to 39.15 kg/ha in Vertisol with rock phosphate and glauconite.

Treatment
inoculation of FDN2-1e0
Interactor
FDN2-1e0symbiont
Outcome
available phosphoruse0
Direction
highere0
Value
39.15 kg/hae0
Setting
Vertisole0

Not reportedTaxonComparator

Verbatim

e0

“Soil amended with rock phosphate and glauconite upon inoculation of FDN2-1 showed significantly (p < 0.05) higher available phosphorus (39.15 kg/ha in Vertisol and 26.05 kg/ha in Alfisol) and potassium (493 kg/ha in Vertisol and 181 kg/ha in Alfisol) after 90 days of incubation.”

✓ located verbatim in the source · abstract, characters 1115–1394 · show in text ↑
Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

FDN2-1 inoculation increased available phosphorus to 26.05 kg/ha in Alfisol.

Treatment
inoculation of FDN2-1e0
Outcome
available phosphoruse0
Direction
highere0
Value
26.05 kg/hae0
Setting
Alfisole0

Not reportedTaxonComparator

Verbatim

e0

“Soil amended with rock phosphate and glauconite upon inoculation of FDN2-1 showed significantly (p < 0.05) higher available phosphorus (39.15 kg/ha in Vertisol and 26.05 kg/ha in Alfisol) and potassium (493 kg/ha in Vertisol and 181 kg/ha in Alfisol) after 90 days of incubation.”

✓ located verbatim in the source · abstract, characters 1115–1394 · show in text ↑
Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

FDN2-1 inoculation increased available potassium to 493 kg/ha in Vertisol.

Treatment
inoculation of FDN2-1e0
Outcome
potassiume0
Direction
highere0
Value
493 kg/hae0
Setting
Vertisole0

Not reportedTaxonComparator

Verbatim

e0

“Soil amended with rock phosphate and glauconite upon inoculation of FDN2-1 showed significantly (p < 0.05) higher available phosphorus (39.15 kg/ha in Vertisol and 26.05 kg/ha in Alfisol) and potassium (493 kg/ha in Vertisol and 181 kg/ha in Alfisol) after 90 days of incubation.”

✓ located verbatim in the source · abstract, characters 1115–1394 · show in text ↑
Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

FDN2-1 inoculation increased available potassium to 181 kg/ha in Alfisol.

Treatment
inoculation of FDN2-1e0
Outcome
potassiume0
Direction
highere0
Value
181 kg/hae0
Setting
Alfisole0

Not reportedTaxonComparator

Verbatim

e0

“Soil amended with rock phosphate and glauconite upon inoculation of FDN2-1 showed significantly (p < 0.05) higher available phosphorus (39.15 kg/ha in Vertisol and 26.05 kg/ha in Alfisol) and potassium (493 kg/ha in Vertisol and 181 kg/ha in Alfisol) after 90 days of incubation.”

✓ located verbatim in the source · abstract, characters 1115–1394 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

Endophytes from different corn growth stages showed high genetic similarity.

Organ / stage
seedling stagee0
Outcome
high genetic similarity between the isolates from different growth stagese0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Zea mays subsp. mays
Zea mays subsp. mays · TaxonDominicus Johannes Bergsma · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“Most of the isolates obtained from seedling stage (15 days after sowing) formed cluster with isolate obtained at later stages with two additional isolates one each at 40 and 60 days of sowing indicated high genetic similarity between the isolates from different growth stages as detected by amplified ribosomal DNA restriction analysis.”

✓ located verbatim in the source · abstract, characters 1395–1731 · show in text ↑
t0

“corn root tissue”

✓ located after whitespace/quote normalisation · title, characters 162–178 · show in text ↑

inoculation · soil: chemistry · Zea mays (maize)Positive and negative results

71 papers: 62 positive, 9 negative or no effect

61 papers in the same direction as this paper · 9 in the opposite direction

  1. negative
  2. no effect
  3. no effect

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inoculation · nutrient: content · Zea mays (maize)Positive and negative results

306 papers: 288 positive, 18 negative or no effect

287 papers in the same direction as this paper · 16 in the opposite direction · 2 reporting no difference from an alternative

  1. positive
  2. positive
  3. no effect

302 papers more in this group

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inoculation · growth · Zea mays (maize)Positive and negative results

699 papers: 635 positive, 64 negative or no effect

634 papers in the same direction as this paper · 61 in the opposite direction · 3 reporting no difference from an alternative

  1. positive
  2. positive
  3. negative

695 papers more in this group

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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.