Abstract
In two different experiments, three prolific and three nonproliflc single‐cross hybrids of maize ( Zea mays L.) growth were treated with growing regulating chemicals to determine their effects on ear development. In experiment A, the compounds used were N‐l‐naphthylphthalamic acid (NPA), p‐chlorophenoxyisobutyric acid (PCIB), and 6( γ , γ ‐dimethylalllyamino) purine (i 6 Ade), all at concentration of 10‐ 4 M . Treatments were applied as 0.5‐ml injections to the internode between the first and second ear shoots of nonprolific hybrids and between the second and third ear shoots of prolific hybrids. The auxin translocation inhibitor (NPA) significantly increased total yield of nonprolific hybrids and increased lower ear grain weight and ear number of all hybrids. The antiauxin, PCIB, had no discernible effect, while i 6 Ade (cytokinin) treatments decreased total yield of nonprolific hybrids and the yield of lower ears of all hybrids. In experiment B, upper ear shoots were excised on the day of silking and treatments of indolebutyric acid (IBA), gibberellic acid (GA 3 ), and cytoklnin (i 6 Ade) were injected into the remaining ear shank. Gibberellic acid and combinations of IBA and GA 3 treatments sgnificantly reduced ear number. The results of these experiments indicate that indoleacetic acid (IAA), GA 3 , and possibly other hormones interact in a time‐dependent mode to inhibit lower ear development. The close relationship between sink size and total yield demonstrates the importance of an adequate sink for plants grown at low density.
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Claims 9
Claim · model-written summary
NPA significantly increased total yield of nonprolific hybrids.
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The auxin translocation inhibitor (NPA) significantly increased total yield of nonprolific hybrids and increased lower ear grain weight and ear number of all hybrids.”
e1“hybrids of maize ( Zea mays L.)”
Claim · model-written summary
NPA increased lower-ear grain weight and ear number in all hybrids.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The auxin translocation inhibitor (NPA) significantly increased total yield of nonprolific hybrids and increased lower ear grain weight and ear number of all hybrids.”
e1“hybrids of maize ( Zea mays L.)”
Claim · model-written summary
PCIB had no discernible effect.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The antiauxin, PCIB, had no discernible effect”
e1“hybrids of maize ( Zea mays L.)”
Claim · model-written summary
Cytokinin i 6 Ade decreased total yield of nonprolific hybrids.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“i 6 Ade (cytokinin) treatments decreased total yield of nonprolific hybrids and the yield of lower ears of all hybrids.”
e1“hybrids of maize ( Zea mays L.)”
Claim · model-written summary
Cytokinin i 6 Ade decreased lower-ear yield in all hybrids.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“i 6 Ade (cytokinin) treatments decreased total yield of nonprolific hybrids and the yield of lower ears of all hybrids.”
e1“hybrids of maize ( Zea mays L.)”
Claim · model-written summary
Gibberellic acid significantly reduced ear number.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Gibberellic acid and combinations of IBA and GA 3 treatments sgnificantly reduced ear number.”
e1“hybrids of maize ( Zea mays L.)”
Claim · model-written summary
Combined IBA and GA 3 significantly reduced ear number.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Gibberellic acid and combinations of IBA and GA 3 treatments sgnificantly reduced ear number.”
e1“hybrids of maize ( Zea mays L.)”
Claim · model-written summary
The authors infer that hormone interactions inhibit lower-ear development in a time-dependent manner.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“indoleacetic acid (IAA), GA 3 , and possibly other hormones interact in a time‐dependent mode to inhibit lower ear development.”
e1“hybrids of maize ( Zea mays L.)”
Claim · model-written summary
Sink size was closely related to total yield at low plant density.
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The close relationship between sink size and total yield demonstrates the importance of an adequate sink for plants grown at low density.”
e1“hybrids of maize ( Zea mays L.)”
The same questions in other papers
Gibberellic acid · yield · Zea mays (maize)Results differ
2 papers in the same direction as this paper · 19 in the opposite direction
- positive
- positive
- positive
18 papers more in this group
See all 22 papers →indole-3-butyric acid · yield · Zea mays (maize)Positive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- positive
- negative
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.