Abstract
Slices of corn scutellum were used to study amino acid uptake, a natural function of this tissue. The uptake of glutamine was found to be inhibited by several monovalent cations. The accompanying anion did not affect the inhibition. Divalent cations stimulated glutamine uptake, particularly at high glutamine concentrations. The inhibition by monovalent cations was reversed by divalent cations.There was a broad pH optimum (4.3-5.2), and a wide range of pH values over which substantial rates of glutamine uptake were observed (3-7).Seventeen protein amino acids were tested for their effects on glutamine uptake. l-Alanine, l-cysteine, l-glutamic acid, glycine, l-serine, and l-methionine were the only inhibitory amino acids. The inhibition by alanine and methionine was overcome at high glutamine concentrations whereas the inhibition by monovalent cations was not. The inhibition by amino acids was not reversed by divalent cations. d-Alanine and d-methionine had no effect on glutamine uptake.High concentrations of sucrose (0.5 m) did not affect glutamine uptake. Thus, osmotic shock did not cause a dissociation of a transport protein from a membrane. Mannose inhibited glutamine uptake but glucose, galactose, and fructose did not. In addition to respiratory inhibitors, N-ethylmaleimide inhibited glutamine uptake. Ouabain did not affect glutamine uptake.
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Claims 19
Claim · model-written summary
Glutamine uptake by corn scutellum slices was inhibited by several monovalent cations.
- Taxon
- corn
Zea mays subsp. mayst0 - Organ / stage
- scutellumt0
- Treatment
- several monovalent cationse1
- Outcome
- uptake of glutaminee1
- Direction
- inhibitede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The uptake of glutamine was found to be inhibited by several monovalent cations”
t0“Corn Scutellum”
Claim · model-written summary
The accompanying anion did not affect the inhibition of glutamine uptake by monovalent cations.
- Taxon
- cornZea mays subsp. mayst0
- Organ / stage
- scutellumt0
- Treatment
- accompanying anione1
- Outcome
- inhibitione1
- Direction
- did not affecte1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The accompanying anion did not affect the inhibition”
t0“Corn Scutellum”
Claim · model-written summary
Divalent cations stimulated glutamine uptake, particularly at high glutamine concentrations.
- Taxon
- cornZea mays subsp. mayst0
- Organ / stage
- scutellumt0
- Treatment
- Divalent cationse1
- Outcome
- glutamine uptakee1
- Direction
- stimulatede1
- Qualifier
- particularly at high glutamine concentrationse1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Divalent cations stimulated glutamine uptake, particularly at high glutamine concentrations”
t0“Corn Scutellum”
Claim · model-written summary
The inhibition of glutamine uptake by monovalent cations was reversed by divalent cations.
- Taxon
- cornZea mays subsp. mayst0
- Organ / stage
- scutellumt0
- Treatment
- divalent cationse1
- Outcome
- inhibition by monovalent cationse1
- Direction
- reversede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The inhibition by monovalent cations was reversed by divalent cations”
t0“Corn Scutellum”
Claim · model-written summary
Glutamine uptake showed a broad pH optimum of 4.3-5.2.
- Taxon
- cornZea mays subsp. mayst0
- Organ / stage
- scutellumt0
- Outcome
- pH optimume1
- Value
- 4.3-5.2e1
- Qualifier
- broade1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“There was a broad pH optimum (4.3-5.2)”
t0“Corn Scutellum”
Claim · model-written summary
Substantial rates of glutamine uptake were observed over a wide range of pH values, 3-7.
- Taxon
- cornZea mays subsp. mayst0
- Organ / stage
- scutellumt0
- Outcome
- substantial rates of glutamine uptakee1
- Value
- 3-7e1
- Qualifier
- wide range of pH valuese1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“a wide range of pH values over which substantial rates of glutamine uptake were observed (3-7)”
t0“Corn Scutellum”
Claim · model-written summary
L-Alanine, L-cysteine and L-glutamic acid were among the only protein amino acids that inhibited glutamine uptake.
- Taxon
- cornZea mays subsp. mayst0
- Organ / stage
- scutellumt0
- Treatment
- l-Alanine, l-cysteine, l-glutamic acide2
- Outcome
- glutamine uptakee1
- Direction
- inhibitorye2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Seventeen protein amino acids were tested for their effects on glutamine uptake”
e2“l-Alanine, l-cysteine, l-glutamic acid, glycine, l-serine, and l-methionine were the only inhibitory amino acids”
t0“Corn Scutellum”
Claim · model-written summary
Glycine, L-serine and L-methionine were among the only protein amino acids that inhibited glutamine uptake.
- Taxon
- cornZea mays subsp. mayst0
- Organ / stage
- scutellumt0
- Treatment
- glycine, l-serine, and l-methioninee2
- Outcome
- glutamine uptakee1
- Direction
- inhibitorye2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Seventeen protein amino acids were tested for their effects on glutamine uptake”
e2“l-Alanine, l-cysteine, l-glutamic acid, glycine, l-serine, and l-methionine were the only inhibitory amino acids”
t0“Corn Scutellum”
Claim · model-written summary
The inhibition of glutamine uptake by alanine and methionine was overcome at high glutamine concentrations.
- Taxon
- cornZea mays subsp. mayst0
- Organ / stage
- scutellumt0
- Treatment
- high glutamine concentrationse1
- Outcome
- inhibition by alanine and methioninee1
- Direction
- overcomee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The inhibition by alanine and methionine was overcome at high glutamine concentrations whereas the inhibition by monovalent cations was not”
t0“Corn Scutellum”
Claim · model-written summary
The inhibition of glutamine uptake by monovalent cations was not overcome at high glutamine concentrations.
- Taxon
- cornZea mays subsp. mayst0
- Organ / stage
- scutellumt0
- Treatment
- high glutamine concentrationse1
- Outcome
- inhibition by monovalent cationse1
- Direction
- was note1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The inhibition by alanine and methionine was overcome at high glutamine concentrations whereas the inhibition by monovalent cations was not”
t0“Corn Scutellum”
Claim · model-written summary
The inhibition of glutamine uptake by amino acids was not reversed by divalent cations.
- Taxon
- cornZea mays subsp. mayst0
- Organ / stage
- scutellumt0
- Treatment
- divalent cationse1
- Outcome
- inhibition by amino acidse1
- Direction
- not reversede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The inhibition by amino acids was not reversed by divalent cations”
t0“Corn Scutellum”
Claim · model-written summary
D-Alanine and D-methionine had no effect on glutamine uptake.
- Taxon
- cornZea mays subsp. mayst0
- Organ / stage
- scutellumt0
- Treatment
- d-Alanine and d-methioninee1
- Outcome
- glutamine uptakee1
- Direction
- no effecte1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“d-Alanine and d-methionine had no effect on glutamine uptake”
t0“Corn Scutellum”
Claim · model-written summary
High concentrations of sucrose (0.5 m) did not affect glutamine uptake.
- Taxon
- cornZea mays subsp. mayst0
- Organ / stage
- scutellumt0
- Treatment
- High concentrations of sucrose (0.5 m)e1
- Outcome
- glutamine uptakee1
- Direction
- did not affecte1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“High concentrations of sucrose (0.5 m) did not affect glutamine uptake”
t0“Corn Scutellum”
Claim · model-written summary
The authors concluded that osmotic shock did not cause dissociation of a transport protein from a membrane.
- Taxon
- cornZea mays subsp. mayst0
- Organ / stage
- scutellumt0
- Treatment
- osmotic shocke1
- Outcome
- dissociation of a transport protein from a membranee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“osmotic shock did not cause a dissociation of a transport protein from a membrane”
t0“Corn Scutellum”
Claim · model-written summary
Mannose inhibited glutamine uptake.
- Taxon
- cornZea mays subsp. mayst0
- Organ / stage
- scutellumt0
- Treatment
- Mannosee1
- Outcome
- glutamine uptakee1
- Direction
- inhibitede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Mannose inhibited glutamine uptake but glucose, galactose, and fructose did not”
t0“Corn Scutellum”
Claim · model-written summary
Glucose, galactose and fructose did not inhibit glutamine uptake.
- Taxon
- cornZea mays subsp. mayst0
- Organ / stage
- scutellumt0
- Treatment
- glucose, galactose, and fructosee1
- Outcome
- glutamine uptakee1
- Direction
- did note1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Mannose inhibited glutamine uptake but glucose, galactose, and fructose did not”
t0“Corn Scutellum”
Claim · model-written summary
Respiratory inhibitors inhibited glutamine uptake.
- Taxon
- cornZea mays subsp. mayst0
- Organ / stage
- scutellumt0
- Treatment
- respiratory inhibitorse1
- Outcome
- glutamine uptakee1
- Direction
- inhibitede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“In addition to respiratory inhibitors, N-ethylmaleimide inhibited glutamine uptake”
t0“Corn Scutellum”
Claim · model-written summary
N-ethylmaleimide inhibited glutamine uptake.
- Taxon
- cornZea mays subsp. mayst0
- Organ / stage
- scutellumt0
- Treatment
- N-ethylmaleimidee1
- Outcome
- glutamine uptakee1
- Direction
- inhibitede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“In addition to respiratory inhibitors, N-ethylmaleimide inhibited glutamine uptake”
t0“Corn Scutellum”
Claim · model-written summary
Ouabain did not affect glutamine uptake.
- Taxon
- cornZea mays subsp. mayst0
- Organ / stage
- scutellumt0
- Treatment
- Ouabaine1
- Outcome
- glutamine uptakee1
- Direction
- did not affecte1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Ouabain did not affect glutamine uptake”
t0“Corn Scutellum”
The same questions in other papers
glutamine · disease · Zea mays (maize)Positive and negative results
2 in the opposite direction
- positive
- positive
glucose · nutrient: content · Zea mays (maize)Positive and negative results
1 paper in the same direction as this paper · 2 in the opposite direction
- positive
- positive
- no effect
sucrose · nutrient: content · Zea mays (maize)Positive and negative results
2 papers in the same direction as this paper · 3 in the opposite direction
- positive
- positive
- positive
2 papers more in this group
See all 6 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.