Abstract
L‐tryptophan added to the nutrient solution has been shown to eliminate retarded growth and deficiency symptoms resulting from omission of zinc in the growth of young corn seedlings ( Zea mays L.). Compared to those which received zinc, seedlings treated with tryptophan had about a five‐fold reduction in tissue‐zinc content. No additive effect on growth was observed when tryptophan and zinc were supplied together. Addition of indole‐3‐acetic acid (IAA) failed to correct deficiency symptoms or restore growth rate in zinc‐deficient plants. The results indicated that optimal synthesis of tryptophan depended on suitable levels of zinc in the tissue and that the leaf‐streaking symptom was actually caused by low levels of this amino acid in the tissue under zincdeficient conditions.
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Claims 6
Claim · model-written summary
L-tryptophan eliminated growth retardation and deficiency symptoms in zinc-deficient corn.
- Taxon
- corn
Zea mays subsp. mayse0 - Organ / stage
- seedlingse0
- Treatment
- L‐tryptophane0
- Outcome
- retarded growth and deficiency symptomse0
- Direction
- eliminatee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“L‐tryptophan added to the nutrient solution has been shown to eliminate retarded growth and deficiency symptoms resulting from omission of zinc in the growth of young corn seedlings ( Zea mays L.)”
t0“Corn Seedlings”
Claim · model-written summary
Tryptophan-treated seedlings had about five-fold less tissue zinc than zinc-treated seedlings.
- Taxon
- cornZea mays subsp. mayst0
- Treatment
- tryptophane0
- Outcome
- tissue‐zinc contente0
- Direction
- reductione0
- Value
- about a five‐folde0
- Comparator
- those which received zince0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Compared to those which received zinc, seedlings treated with tryptophan had about a five‐fold reduction in tissue‐zinc content”
t0“Corn Seedlings”
Claim · model-written summary
Combined tryptophan and zinc had no additive growth effect.
- Taxon
- cornZea mays subsp. mayst0
- Treatment
- tryptophan and zince0
- Outcome
- growthe0
- Direction
- No additive effecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“No additive effect on growth was observed when tryptophan and zinc were supplied together”
t0“Corn Seedlings”
Claim · model-written summary
IAA did not correct zinc-deficiency symptoms or restore growth rate.
- Taxon
- cornZea mays subsp. mayst0
- Treatment
- indole‐3‐acetic acid (IAA)e0
- Outcome
- deficiency symptoms or restore growth ratee0
- Direction
- failed to correcte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Addition of indole‐3‐acetic acid (IAA) failed to correct deficiency symptoms or restore growth rate in zinc‐deficient plants”
t0“Corn Seedlings”
Claim · model-written summary
Authors concluded zinc availability governs optimal tryptophan synthesis.
- Taxon
- cornZea mays subsp. mayst0
- Compound
- zince0
- Outcome
- optimal synthesis of tryptophane0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“optimal synthesis of tryptophan depended on suitable levels of zinc in the tissue”
t0“Corn Seedlings”
Claim · model-written summary
Authors attributed leaf streaking under zinc deficiency to low tissue tryptophan.
- Taxon
- cornZea mays subsp. mayst0
- Outcome
- leaf‐streaking symptome0
- Qualifier
- low levels of this amino acid in the tissue under zincdeficient conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the leaf‐streaking symptom was actually caused by low levels of this amino acid in the tissue under zincdeficient conditions”
t0“Corn Seedlings”
The same questions in other papers
zinc atom · growth · Zea mays (maize)Results differ
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indole-3-acetic acid · disease · Zea mays (maize)Positive and negative results
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See all 7 papers →L-tryptophan · disease · Zea mays (maize)Results agree
1 paper in the same direction as this paper
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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.