Paper · 2018 · IOP Conference Series Earth and Environmental Science

The Effect of Plant Growth Promoting Rhizobacteria (PGPR) on Germination and Seedling Growth ofSorghum bicolorL. Moench

S Widawati; Suliasih

14
claims
27
verbatim quotes
29
citations
3
research areas
✓
Open access · cc-by

Abstract

Germination is the first important step of the plant growth in the land. The germination and growth of sorghum in marginal land can be optimized by inoculating with PGPR (inoculants), hydrogel and CMC (carriers). The aim of the research was to evaluate the response of germination and seedling growth of sorghum using PGPR inoculation with hydrogel and CMC as carriers (in vitro) and pots containing sterile sand (in vivo). The experiment used PGPR (Azospirillum lipoferum 1103D, Azotobacter chroococcum 4103D, and Bacillus sp. 3D), and hydrogels as the reserve water, as well as carboxymethyl cellulose (CMC) as the adhesive media. The results showed that the combination of PGPR-mix (Azospirillum, Azotobacter, Bacillus) with hydrogels as bio-organic fertilizer and CMC as carriers has promoted the growth of the roots, shoots and vigour index of in vitro sorghum germination, as well as increased the root length, shoot length and total dry weight of sorghum seedlings in pots containing sterile sand. The best result of in vitro experiment (root length = 8.67 cm; shoot length = 12.6 cm; and vigor index = 2127.00) was obtained by sorghum seed inoculated with single PGPR inoculant (A. lipoferum) with carrier of CMC. The root length, shoot length and total dry weight of the highest sorghum seedlings were obtained by PGPR-mix inoculants without carriers (46.5 cm, 12 cm, and 0.477 g), PGPR-mix with carrier of CMC (48.67 cm, 15.67 cm, and 0.431 g), and PGPR-mix with carrier of hydrogel (48.67 cm, 15 cm, and 0.430 g).

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Claims 14

Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

PGPR mix with hydrogel and CMC promoted in vitro sorghum root and shoot growth and vigour index.

Taxon
sorghumSorghume0
Treatment
PGPR-mix (Azospirillum, Azotobacter, Bacillus) with hydrogels as bio-organic fertilizer and CMC as carrierse0
Interactor
AzospirillumAzospirillume0symbiont
Outcome
growth of the roots, shoots and vigour indexe0
Direction
promotede0
Qualifier
Azotobacter, Bacilluse0

Not reportedComparator

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

Sorghum
Sorghum · Taxon · picture of the genus (one of its species)Evelyn Simak · CC BY-SA 2.0 · Wikimedia Commons ↗
Azospirillum
Azospirillum · InteractorFadelblaid · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“the combination of PGPR-mix (Azospirillum, Azotobacter, Bacillus) with hydrogels as bio-organic fertilizer and CMC as carriers has promoted the growth of the roots, shoots and vigour index of in vitro sorghum germination”

✓ located verbatim in the source · abstract, characters 657–877 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

PGPR mix with hydrogel and CMC increased root length, shoot length and total dry weight of sorghum seedlings in sterile sand pots.

Taxon
sorghumSorghume0
Treatment
PGPR-mix (Azospirillum, Azotobacter, Bacillus) with hydrogels as bio-organic fertilizer and CMC as carrierse1
Interactor
AzospirillumAzospirillume1symbiont
Outcome
root length, shoot length and total dry weighte0
Direction
increasede0
Qualifier
Azotobacter, Bacilluse1
Setting
pots containing sterile sande0

Not reportedComparator

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

Sorghum
Sorghum · Taxon · picture of the genus (one of its species)Evelyn Simak · CC BY-SA 2.0 · Wikimedia Commons ↗
Azospirillum
Azospirillum · InteractorFadelblaid · CC BY-SA 4.0 · Wikimedia Commons ↗

Verbatim

e0

“increased the root length, shoot length and total dry weight of sorghum seedlings in pots containing sterile sand”

✓ located verbatim in the source · abstract, characters 890–1003 · show in text ↑
e1

“the combination of PGPR-mix (Azospirillum, Azotobacter, Bacillus) with hydrogels as bio-organic fertilizer and CMC as carriers”

✓ located verbatim in the source · abstract, characters 657–783 · show in text ↑
Observationobservedoriginal resultpositivemeasured

Claim · model-written summary

In vitro root length reached 8.67 cm with A. lipoferum and CMC, the reported best treatment.

Taxon
sorghumSorghume1
Treatment
inoculated with single PGPR inoculant (A. lipoferum) with carrier of CMCe1
Interactor
A. lipoferumAzospirillum lipoferume1symbiont
Outcome
root lengthe0
Value
8.67 cme0

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

Sorghum
Sorghum · Taxon · picture of the genus (one of its species)Evelyn Simak · CC BY-SA 2.0 · Wikimedia Commons ↗

Verbatim

e0

“root length = 8.67 cm”

✓ located verbatim in the source · abstract, characters 1045–1066 · show in text ↑
e1

“sorghum seed inoculated with single PGPR inoculant (A. lipoferum) with carrier of CMC”

✓ located verbatim in the source · abstract, characters 1135–1220 · show in text ↑
Observationobservedoriginal resultpositivemeasured

Claim · model-written summary

In vitro shoot length reached 12.6 cm with A. lipoferum and CMC.

Taxon
sorghumSorghume1
Treatment
inoculated with single PGPR inoculant (A. lipoferum) with carrier of CMCe1
Interactor
A. lipoferumAzospirillum lipoferume1symbiont
Outcome
shoot lengthe0
Value
12.6 cme0

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

Sorghum
Sorghum · Taxon · picture of the genus (one of its species)Evelyn Simak · CC BY-SA 2.0 · Wikimedia Commons ↗

Verbatim

e0

“shoot length = 12.6 cm”

✓ located verbatim in the source · abstract, characters 1068–1090 · show in text ↑
e1

“sorghum seed inoculated with single PGPR inoculant (A. lipoferum) with carrier of CMC”

✓ located verbatim in the source · abstract, characters 1135–1220 · show in text ↑
Observationobservedoriginal resultpositivemeasured

Claim · model-written summary

In vitro vigor index reached 2127.00 with A. lipoferum and CMC.

Taxon
sorghumSorghume1
Treatment
inoculated with single PGPR inoculant (A. lipoferum) with carrier of CMCe1
Interactor
A. lipoferumAzospirillum lipoferume1symbiont
Outcome
vigor indexe0
Value
2127.00e0

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

Sorghum
Sorghum · Taxon · picture of the genus (one of its species)Evelyn Simak · CC BY-SA 2.0 · Wikimedia Commons ↗

Verbatim

e0

“vigor index = 2127.00”

✓ located verbatim in the source · abstract, characters 1096–1117 · show in text ↑
e1

“sorghum seed inoculated with single PGPR inoculant (A. lipoferum) with carrier of CMC”

✓ located verbatim in the source · abstract, characters 1135–1220 · show in text ↑
Observationobservedoriginal resultpositivemeasured

Claim · model-written summary

PGPR mix without carriers yielded sorghum seedling root length of 46.5 cm.

Taxon
sorghumSorghume1
Treatment
PGPR-mix inoculants without carrierse0
Outcome
root lengthe1
Value
46.5 cme0

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

Sorghum
Sorghum · Taxon · picture of the genus (one of its species)Evelyn Simak · CC BY-SA 2.0 · Wikimedia Commons ↗

Verbatim

e0

“PGPR-mix inoculants without carriers (46.5 cm, 12 cm, and 0.477 g)”

✓ located verbatim in the source · abstract, characters 1323–1389 · show in text ↑
e1

“root length, shoot length and total dry weight of the highest sorghum seedlings”

✓ located verbatim in the source · abstract, characters 1226–1305 · show in text ↑
Observationobservedoriginal resultpositivemeasured

Claim · model-written summary

PGPR mix without carriers yielded sorghum seedling shoot length of 12 cm.

Taxon
sorghumSorghume1
Treatment
PGPR-mix inoculants without carrierse0
Outcome
shoot lengthe1
Value
12 cme0

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

Sorghum
Sorghum · Taxon · picture of the genus (one of its species)Evelyn Simak · CC BY-SA 2.0 · Wikimedia Commons ↗

Verbatim

e0

“PGPR-mix inoculants without carriers (46.5 cm, 12 cm, and 0.477 g)”

✓ located verbatim in the source · abstract, characters 1323–1389 · show in text ↑
e1

“root length, shoot length and total dry weight of the highest sorghum seedlings”

✓ located verbatim in the source · abstract, characters 1226–1305 · show in text ↑
Observationobservedoriginal resultpositivemeasured

Claim · model-written summary

PGPR mix without carriers yielded sorghum seedling total dry weight of 0.477 g.

Taxon
sorghumSorghume1
Treatment
PGPR-mix inoculants without carrierse0
Outcome
total dry weighte1
Value
0.477 ge0

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

Sorghum
Sorghum · Taxon · picture of the genus (one of its species)Evelyn Simak · CC BY-SA 2.0 · Wikimedia Commons ↗

Verbatim

e0

“PGPR-mix inoculants without carriers (46.5 cm, 12 cm, and 0.477 g)”

✓ located verbatim in the source · abstract, characters 1323–1389 · show in text ↑
e1

“root length, shoot length and total dry weight of the highest sorghum seedlings”

✓ located verbatim in the source · abstract, characters 1226–1305 · show in text ↑
Observationobservedoriginal resultpositivemeasured

Claim · model-written summary

PGPR mix with CMC yielded sorghum seedling root length of 48.67 cm.

Taxon
sorghumSorghume1
Treatment
PGPR-mix with carrier of CMCe0
Outcome
root lengthe1
Value
48.67 cme0

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

Sorghum
Sorghum · Taxon · picture of the genus (one of its species)Evelyn Simak · CC BY-SA 2.0 · Wikimedia Commons ↗

Verbatim

e0

“PGPR-mix with carrier of CMC (48.67 cm, 15.67 cm, and 0.431 g)”

✓ located verbatim in the source · abstract, characters 1391–1453 · show in text ↑
e1

“root length, shoot length and total dry weight of the highest sorghum seedlings”

✓ located verbatim in the source · abstract, characters 1226–1305 · show in text ↑
Observationobservedoriginal resultpositivemeasured

Claim · model-written summary

PGPR mix with CMC yielded sorghum seedling shoot length of 15.67 cm.

Taxon
sorghumSorghume1
Treatment
PGPR-mix with carrier of CMCe0
Outcome
shoot lengthe1
Value
15.67 cme0

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

Sorghum
Sorghum · Taxon · picture of the genus (one of its species)Evelyn Simak · CC BY-SA 2.0 · Wikimedia Commons ↗

Verbatim

e0

“PGPR-mix with carrier of CMC (48.67 cm, 15.67 cm, and 0.431 g)”

✓ located verbatim in the source · abstract, characters 1391–1453 · show in text ↑
e1

“root length, shoot length and total dry weight of the highest sorghum seedlings”

✓ located verbatim in the source · abstract, characters 1226–1305 · show in text ↑
Observationobservedoriginal resultpositivemeasured

Claim · model-written summary

PGPR mix with CMC yielded sorghum seedling total dry weight of 0.431 g.

Taxon
sorghumSorghume1
Treatment
PGPR-mix with carrier of CMCe0
Outcome
total dry weighte1
Value
0.431 ge0

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

Sorghum
Sorghum · Taxon · picture of the genus (one of its species)Evelyn Simak · CC BY-SA 2.0 · Wikimedia Commons ↗

Verbatim

e0

“PGPR-mix with carrier of CMC (48.67 cm, 15.67 cm, and 0.431 g)”

✓ located verbatim in the source · abstract, characters 1391–1453 · show in text ↑
e1

“root length, shoot length and total dry weight of the highest sorghum seedlings”

✓ located verbatim in the source · abstract, characters 1226–1305 · show in text ↑
Observationobservedoriginal resultpositivemeasured

Claim · model-written summary

PGPR mix with hydrogel yielded sorghum seedling root length of 48.67 cm.

Taxon
sorghumSorghume1
Treatment
PGPR-mix with carrier of hydrogele0
Outcome
root lengthe1
Value
48.67 cme0

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

Sorghum
Sorghum · Taxon · picture of the genus (one of its species)Evelyn Simak · CC BY-SA 2.0 · Wikimedia Commons ↗

Verbatim

e0

“PGPR-mix with carrier of hydrogel (48.67 cm, 15 cm, and 0.430 g)”

✓ located verbatim in the source · abstract, characters 1459–1523 · show in text ↑
e1

“root length, shoot length and total dry weight of the highest sorghum seedlings”

✓ located verbatim in the source · abstract, characters 1226–1305 · show in text ↑
Observationobservedoriginal resultpositivemeasured

Claim · model-written summary

PGPR mix with hydrogel yielded sorghum seedling shoot length of 15 cm.

Taxon
sorghumSorghume1
Treatment
PGPR-mix with carrier of hydrogele0
Outcome
shoot lengthe1
Value
15 cme0

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

Sorghum
Sorghum · Taxon · picture of the genus (one of its species)Evelyn Simak · CC BY-SA 2.0 · Wikimedia Commons ↗

Verbatim

e0

“PGPR-mix with carrier of hydrogel (48.67 cm, 15 cm, and 0.430 g)”

✓ located verbatim in the source · abstract, characters 1459–1523 · show in text ↑
e1

“root length, shoot length and total dry weight of the highest sorghum seedlings”

✓ located verbatim in the source · abstract, characters 1226–1305 · show in text ↑
Observationobservedoriginal resultpositivemeasured

Claim · model-written summary

PGPR mix with hydrogel yielded sorghum seedling total dry weight of 0.430 g.

Taxon
sorghumSorghume1
Treatment
PGPR-mix with carrier of hydrogele0
Outcome
total dry weighte1
Value
0.430 ge0

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

Sorghum
Sorghum · Taxon · picture of the genus (one of its species)Evelyn Simak · CC BY-SA 2.0 · Wikimedia Commons ↗

Verbatim

e0

“PGPR-mix with carrier of hydrogel (48.67 cm, 15 cm, and 0.430 g)”

✓ located verbatim in the source · abstract, characters 1459–1523 · show in text ↑
e1

“root length, shoot length and total dry weight of the highest sorghum seedlings”

✓ located verbatim in the source · abstract, characters 1226–1305 · show in text ↑

Azotobacter · growth · SorghumPositive and negative results

5 papers: 4 positive, 1 negative or no effect

3 papers in the same direction as this paper · 1 in the opposite direction

  1. no effect
  2. positive
  3. positive

1 paper more in this group

See all 5 papers →

Azospirillum · growth · SorghumResults agree

9 papers: 9 positive, 0 negative or no effect

8 papers in the same direction as this paper

  1. positive
  2. positive
  3. positive

5 papers more in this group

See all 9 papers →

fertilization · growth · SorghumResults differ

120 papers: 104 positive, 16 negative or no effect

103 papers in the same direction as this paper · 16 in the opposite direction

  1. negative
  2. negative
  3. no effect

116 papers more in this group

See all 120 papers →

inoculation · growth · SorghumPositive and negative results

76 papers: 65 positive, 11 negative or no effect

64 papers in the same direction as this paper · 9 in the opposite direction · 2 reporting no difference from an alternative

  1. negative
  2. negative
  3. negative

72 papers more in this group

See all 76 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.