Abstract
Plant yield and acetylene reduction were measured on six hybrids and 15 inbreds (including the hybrid parents) of pearl millet, Pennisetum americanum (L.) K. Shum., after field inoculation with Azospirillum brasilense , Sp 13t (reclassified from Spirillum lipoferum Beijerinck). During the first year of testing, inoculation responses were investigated among all plant genotypes by measuring plant dry weight, % N, total N, and acetylene reduction activity. A smaller population of genotypes were tested a second year for repeatability of inoculum response. The first year, one hybrid, Tift 23DA ✕ Tift 186 (‘Gahi 3’), gave significantly higher plant dry weight and total N in response to inoculation. Inoculated Gahi 3 produced 31.7% more dry weight and 37.4% more total plant N when compared to autoclaved inoculum controls. No inbred was found to respond. Acetylene reduction values were low among all genotypes (range 0.54 nmole/[g dry root ✕ hour] and did not support yield effects or confirm inoculum treatments. Inoculation responses were found to be repeatable for all genotypes tested during the second year (positive or negative) but not of a statistically significant magnitude. Of the genotypes tested both years, a combined analysis of the 2‐year yields revealed significant dry weight increases after inoculation of 19.2 and 14.0% with Gahi 3 and the inbred, Bil 3B, respectively. Again, acetylene reduction values did not explain any data. A N balance study was conducted in greenhouse containers on inoculated Gahi 3 plants in an attempt to repeat the yield differences observed in the field and to monitor inputs of N into the soil‐plant system. No significant yield increase of N into the soil‐plant system was found due to inoculation. Sampling error possibly negated an accurate measurement of all N.
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
Inoculated Gahi 3 pearl millet produced 31.7% more dry weight than autoclaved inoculum controls.
- Taxon
- pearl millet
Cenchrus americanuse0 - Material
- Gahi 3e1
- Treatment
- field inoculation with Azospirillum brasilensee0
- Interactor
- Azospirillum brasilense
Azospirillum brasilensee0symbiont - Outcome
- dry weighte1
- Direction
- moree1
- Value
- 31.7%e1
- Comparator
- autoclaved inoculum controlse1
- Setting
- fielde0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plant yield and acetylene reduction were measured on six hybrids and 15 inbreds (including the hybrid parents) of pearl millet, Pennisetum americanum (L.) K. Shum., after field inoculation with Azospirillum brasilense”
e1“Inoculated Gahi 3 produced 31.7% more dry weight and 37.4% more total plant N when compared to autoclaved inoculum controls”
e2“gave significantly higher plant dry weight and total N in response to inoculation”
Claim · model-written summary
Inoculated Gahi 3 pearl millet had 37.4% more total plant N than autoclaved inoculum controls.
- Taxon
- pearl milletCenchrus americanuse0
- Material
- Gahi 3e1
- Treatment
- field inoculation with Azospirillum brasilensee0
- Interactor
- Azospirillum brasilenseAzospirillum brasilensee0symbiont
- Outcome
- total plant Ne1
- Direction
- moree1
- Value
- 37.4%e1
- Comparator
- autoclaved inoculum controlse1
- Setting
- fielde0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plant yield and acetylene reduction were measured on six hybrids and 15 inbreds (including the hybrid parents) of pearl millet, Pennisetum americanum (L.) K. Shum., after field inoculation with Azospirillum brasilense”
e1“Inoculated Gahi 3 produced 31.7% more dry weight and 37.4% more total plant N when compared to autoclaved inoculum controls”
e2“gave significantly higher plant dry weight and total N in response to inoculation”
Claim · model-written summary
Gahi 3 dry weight increased 19.2% after inoculation in the combined two-year analysis.
- Taxon
- pearl milletCenchrus americanuse0
- Material
- Gahi 3e6
- Treatment
- after inoculatione6
- Interactor
- Azospirillum brasilenseAzospirillum brasilensee0symbiont
- Outcome
- dry weighte6
- Direction
- increasese6
- Value
- 19.2e6
- Qualifier
- 2‐year yieldse6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plant yield and acetylene reduction were measured on six hybrids and 15 inbreds (including the hybrid parents) of pearl millet, Pennisetum americanum (L.) K. Shum., after field inoculation with Azospirillum brasilense”
e6“a combined analysis of the 2‐year yields revealed significant dry weight increases after inoculation of 19.2 and 14.0% with Gahi 3 and the inbred, Bil 3B, respectively”
Claim · model-written summary
Bil 3B dry weight increased 14.0% after inoculation in the combined two-year analysis.
- Taxon
- pearl milletCenchrus americanuse0
- Material
- Bil 3Be6
- Treatment
- after inoculatione6
- Interactor
- Azospirillum brasilenseAzospirillum brasilensee0symbiont
- Outcome
- dry weighte6
- Direction
- increasese6
- Value
- 14.0%e6
- Qualifier
- 2‐year yieldse6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plant yield and acetylene reduction were measured on six hybrids and 15 inbreds (including the hybrid parents) of pearl millet, Pennisetum americanum (L.) K. Shum., after field inoculation with Azospirillum brasilense”
e6“a combined analysis of the 2‐year yields revealed significant dry weight increases after inoculation of 19.2 and 14.0% with Gahi 3 and the inbred, Bil 3B, respectively”
Claim · model-written summary
Inoculation did not significantly increase N input into the soil-plant system in greenhouse containers.
- Taxon
- pearl milletCenchrus americanuse0
- Material
- Gahi 3e6
- Treatment
- inoculatione7
- Interactor
- Azospirillum brasilenseAzospirillum brasilensee0symbiont
- Outcome
- N into the soil‐plant systeme7
- Direction
- increasee7
- Setting
- greenhouse containerse6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plant yield and acetylene reduction were measured on six hybrids and 15 inbreds (including the hybrid parents) of pearl millet, Pennisetum americanum (L.) K. Shum., after field inoculation with Azospirillum brasilense”
e7“No significant yield increase of N into the soil‐plant system was found due to inoculation”
e6“A N balance study was conducted in greenhouse containers on inoculated Gahi 3 plants”
Claim · model-written summary
Inoculation responses were repeatable for all genotypes in the second year but not statistically significant.
- Taxon
- pearl milletCenchrus americanuse0
- Interactor
- Azospirillum brasilenseAzospirillum brasilensee0symbiont
- Outcome
- Inoculation responsese5
- Qualifier
- repeatable for all genotypes tested during the second year (positive or negative)e5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plant yield and acetylene reduction were measured on six hybrids and 15 inbreds (including the hybrid parents) of pearl millet, Pennisetum americanum (L.) K. Shum., after field inoculation with Azospirillum brasilense”
e5“Inoculation responses were found to be repeatable for all genotypes tested during the second year (positive or negative) but not of a statistically significant magnitude”
Claim · model-written summary
No pearl millet inbred responded to inoculation in the first year.
- Taxon
- pearl milletCenchrus americanuse0
- Material
- inbrede3
- Interactor
- Azospirillum brasilenseAzospirillum brasilensee0symbiont
- Outcome
- responde3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plant yield and acetylene reduction were measured on six hybrids and 15 inbreds (including the hybrid parents) of pearl millet, Pennisetum americanum (L.) K. Shum., after field inoculation with Azospirillum brasilense”
e3“No inbred was found to respond”
Claim · model-written summary
Acetylene reduction values were low among all pearl millet genotypes.
- Taxon
- pearl milletCenchrus americanuse0
- Interactor
- Azospirillum brasilenseAzospirillum brasilensee0symbiont
- Outcome
- Acetylene reduction valuese4
- Qualifier
- low among all genotypese4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plant yield and acetylene reduction were measured on six hybrids and 15 inbreds (including the hybrid parents) of pearl millet, Pennisetum americanum (L.) K. Shum., after field inoculation with Azospirillum brasilense”
e4“Acetylene reduction values were low among all genotypes”
Claim · model-written summary
Acetylene reduction values did not support yield effects or confirm inoculum treatments.
- Taxon
- pearl milletCenchrus americanuse0
- Interactor
- Azospirillum brasilenseAzospirillum brasilensee0symbiont
- Outcome
- Acetylene reduction valuese4
- Qualifier
- did not support yield effects or confirm inoculum treatmentse5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plant yield and acetylene reduction were measured on six hybrids and 15 inbreds (including the hybrid parents) of pearl millet, Pennisetum americanum (L.) K. Shum., after field inoculation with Azospirillum brasilense”
e4“Acetylene reduction values were low among all genotypes”
e5“did not support yield effects or confirm inoculum treatments”
The same questions in other papers
Azospirillum brasilense · growth · Cenchrus americanus (pearl millet)Results agree
1 paper in the same direction as this paper
- positive
inoculation · Azospirillum brasilense · Cenchrus americanus (pearl millet)Positive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- negative
- positive
inoculation · growth · Cenchrus americanus (pearl millet)Positive and negative results
20 papers in the same direction as this paper · 3 in the opposite direction
- negative
- no effect
- no effect
20 papers more in this group
See all 24 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.