Abstract
The effect of exogenous glucose on the rates of {sup 15}NO{sub 3}{sup {minus}} uptake and reduction in the roots of light-grown corn seedlings was investigated. Under constant nutritional conditions, 5 mM glucose stimulated both {sup 15}NO{sub 3}{sup {minus}} uptake and reduction in roots. In contrast, exposure to 3-O-methyl-D-glucose stimulated {sup 15}NO{sub 3}{sup {minus}} uptake to a lesser degree, but had no effect on reduction. Tissue segments and isolated mitochondria from the roots of plants grown under the same conditions exhibited considerable SHAM-sensitive O{sub 2} uptake in the presence and absence of CN{sup {minus}}. This indicated that respiration via the alternative pathway was occurring. The relationship between the effect of glucose on {sup 15}NO{sub 3}{sup {minus}} uptake/reduction and root energy status/respiration will be discussed.
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Claims 6
Claim · model-written summary
5 mM glucose stimulated root nitrate {sup 15}NO{sub 3}{sup {minus}} uptake in corn seedlings.
- Taxon
- corn
Zea mays subsp. mayse1 - Organ / stage
- rootse2
- Treatment
- 5 mM glucosee0
- Outcome
- {sup 15}NO{sub 3}{sup {minus}} uptakee0
- Direction
- stimulatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“5 mM glucose stimulated both {sup 15}NO{sub 3}{sup {minus}} uptake and reduction in roots.”
e1“light-grown corn seedlings”
e2“in the roots of light-grown corn seedlings”
Claim · model-written summary
5 mM glucose stimulated root nitrate reduction in corn seedlings.
- Taxon
- cornZea mays subsp. mayse1
- Organ / stage
- rootse2
- Treatment
- 5 mM glucosee0
- Outcome
- reductione0
- Direction
- stimulatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“5 mM glucose stimulated both {sup 15}NO{sub 3}{sup {minus}} uptake and reduction in roots.”
e1“light-grown corn seedlings”
e2“in the roots of light-grown corn seedlings”
Claim · model-written summary
3-O-methyl-D-glucose stimulated root nitrate {sup 15}NO{sub 3}{sup {minus}} uptake in corn seedlings.
- Taxon
- cornZea mays subsp. mayse1
- Organ / stage
- rootse2
- Treatment
- 3-O-methyl-D-glucosee0
- Outcome
- {sup 15}NO{sub 3}{sup {minus}} uptakee0
- Direction
- stimulatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“exposure to 3-O-methyl-D-glucose stimulated {sup 15}NO{sub 3}{sup {minus}} uptake to a lesser degree, but had no effect on reduction.”
e1“light-grown corn seedlings”
e2“in the roots of light-grown corn seedlings”
Claim · model-written summary
3-O-methyl-D-glucose no effect root nitrate reduction in corn seedlings.
- Taxon
- cornZea mays subsp. mayse1
- Organ / stage
- rootse2
- Treatment
- 3-O-methyl-D-glucosee0
- Outcome
- reductione0
- Direction
- no effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“exposure to 3-O-methyl-D-glucose stimulated {sup 15}NO{sub 3}{sup {minus}} uptake to a lesser degree, but had no effect on reduction.”
e1“light-grown corn seedlings”
e2“in the roots of light-grown corn seedlings”
Claim · model-written summary
Corn root tissues and mitochondria showed substantial SHAM-sensitive oxygen uptake with or without cyanide.
- Taxon
- cornZea mays subsp. mayse1
- Organ / stage
- rootse0
- Outcome
- SHAM-sensitive O{sub 2} uptakee0
- Qualifier
- in the presence and absence of CN{sup {minus}}e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Tissue segments and isolated mitochondria from the roots of plants grown under the same conditions exhibited considerable SHAM-sensitive O{sub 2} uptake in the presence and absence of CN{sup {minus}}.”
e1“light-grown corn seedlings”
Claim · model-written summary
Alternative pathway respiration was inferred in corn roots.
- Taxon
- cornZea mays subsp. mayse1
- Outcome
- respiration via the alternative pathway was occurringe0
- Qualifier
- alternative pathwaye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“This indicated that respiration via the alternative pathway was occurring.”
e1“light-grown corn seedlings”
The same questions in other papers
glucose · nutrient: content · Zea mays (maize)Positive and negative results
1 paper in the same direction as this paper · 2 in the opposite direction
- no effect
- no effect
- positive
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.