Abstract
Inoculation of corn (Zea mays) seeds with Azospirillum brasilense strain Cd or Sp 7 significantly enhanced (30 to 50% over controls) the uptake of NO(3), K, and H(2)PO(4) into 3- to 4-day- and 2-week-old root segments. No gross changes in root morphology were observed; altered cell arrangement in the outer four or five layers of the cortex was seen in photomicrographs of cross sections of inoculated corn roots. The surface activity involved in ion uptake probably increased, as shown by the darker staining by methylene blue of the affected area. Shoot dry weight increased 20 to 30% in inoculated plants after 3 weeks, presumably by enhancement of mineral uptake. Corn and sorghum plants grown to maturity on limiting nutrients in the greenhouse showed improved growth from inoculation approaching that of plants grown on normal nutrient concentrations. Enhanced ion uptake may be a significant factor in the crop yield enhancement reported for Azospirillum inoculation.
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Claims 7
Claim · model-written summary
Azospirillum strain Cd increased corn-root nitrate, potassium and phosphate uptake by 30 to 50% versus controls.
- Taxon
- corn
Zea mays subsp. mayse0 - Organ / stage
- root segmentse0
- Treatment
- Inoculation of corn (Zea mays) seeds with Azospirillum brasilense strain Cde0
- Interactor
- Azospirillum brasilense strain Cd
Azospirillum brasilensee0symbiont - Outcome
- uptake of NO(3), K, and H(2)PO(4)e0
- Direction
- enhancede0
- Value
- 30 to 50%e0
- Comparator
- controlse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Inoculation of corn (Zea mays) seeds with Azospirillum brasilense strain Cd or Sp 7 significantly enhanced (30 to 50% over controls) the uptake of NO(3), K, and H(2)PO(4) into 3- to 4-day- and 2-week-old root segments.”
Claim · model-written summary
Azospirillum strain Sp 7 increased corn-root nitrate, potassium and phosphate uptake by 30 to 50% versus controls.
- Taxon
- cornZea mays subsp. mayse0
- Organ / stage
- root segmentse0
- Treatment
- Sp 7e0
- Interactor
- Azospirillum brasilenseAzospirillum brasilensee0symbiont
- Outcome
- uptake of NO(3), K, and H(2)PO(4)e0
- Direction
- enhancede0
- Value
- 30 to 50%e0
- Comparator
- controlse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Inoculation of corn (Zea mays) seeds with Azospirillum brasilense strain Cd or Sp 7 significantly enhanced (30 to 50% over controls) the uptake of NO(3), K, and H(2)PO(4) into 3- to 4-day- and 2-week-old root segments.”
Claim · model-written summary
No gross corn-root morphology changes were observed after inoculation.
- Taxon
- cornZea mays subsp. mayse0
- Treatment
- inoculated corn rootse0
- Outcome
- root morphologye0
- Direction
- No gross changese0
Not reportedComparatorValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“No gross changes in root morphology were observed; altered cell arrangement in the outer four or five layers of the cortex was seen in photomicrographs of cross sections of inoculated corn roots.”
Claim · model-written summary
Inoculated corn roots showed altered arrangement in outer cortical cell layers.
- Taxon
- cornZea mays subsp. mayse0
- Organ / stage
- cortexe0
- Treatment
- inoculated corn rootse0
- Outcome
- cell arrangemente0
- Direction
- alterede0
Not reportedComparatorValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“altered cell arrangement in the outer four or five layers of the cortex was seen in photomicrographs of cross sections of inoculated corn roots.”
Claim · model-written summary
Corn shoot dry weight rose 20 to 30% after three weeks of inoculation.
- Treatment
- inoculated plantse0
- Outcome
- Shoot dry weighte0
- Direction
- increasede0
- Value
- 20 to 30%e0
- Qualifier
- after 3 weekse0
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Shoot dry weight increased 20 to 30% in inoculated plants after 3 weeks”
t0“Zea mays”
Claim · model-written summary
Inoculated mature corn on limited nutrients improved in growth toward normally nourished plants.
- Taxon
- CornZea mays subsp. mayse0
- Treatment
- inoculatione0
- Outcome
- growthe0
- Direction
- improvede0
- Comparator
- plants grown on normal nutrient concentrationse0
- Setting
- greenhousee0
Not reportedValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Corn and sorghum plants grown to maturity on limiting nutrients in the greenhouse showed improved growth from inoculation approaching that of plants grown on normal nutrient concentrations.”
Claim · model-written summary
Inoculated mature sorghum on limited nutrients improved in growth toward normally nourished plants.
- Treatment
- inoculatione0
- Outcome
- growthe0
- Direction
- improvede0
- Comparator
- plants grown on normal nutrient concentrationse0
- Setting
- greenhousee0
SorghumNot reportedValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Corn and sorghum plants grown to maturity on limiting nutrients in the greenhouse showed improved growth from inoculation approaching that of plants grown on normal nutrient concentrations.”
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See all 699 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.