Abstract
Two field experiments were carried out at Giza Agricultural Research Station during 1997 and 1998 seasons on Giza•85 cv. to study the response of cotton plants to the natural auxin indole acetic acid (IAA) during the flowering period. IAA was applied at start of flowering at rates of 0, 25, 50, 75 and 100 ppm as foliar spray. The obtained results revealed that IAA application affected significantly most of the chemical constituents of cotton leaves i.e., chlorophyll a, total soluble sugars and phenolic compounds especially poly-phenols. Changes in levels of promoters and inhibitors in cotton leaves were studied. Auxin-treated plants contained less levels of inhibitors and application of 75 and 100 ppm IAA exerted higher concentration of promoters which enhanced the vegetative growth and resulted in significant increases in plant height and dry matter production. IAA application of 50 ppm was resulted in plants producing higher numbers of flowers and total bolls per plant as well as higher boll setting percentage. Applying 100 ppm IAA produced less number of open bolls/plant. Boll weight, seed index, earliness percentage were increased by IAA application. Application of 50 ppm of IAA increased significantly seed cotton yield (kentar/feddan), however application of 100 ppm produced less yield as high concentration induced the vegetative growth on the expense of fruiting growth. However, lint percentage and fiber properties showed no significant response due to IAA application.
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Claims 11
Claim · model-written summary
IAA significantly affected cotton leaf chlorophyll, soluble sugars, and phenolic compounds.
- Taxon
- cotton
Gossypium hirsutume0 - Treatment
- IAA applicatione0
- Outcome
- chemical constituents of cotton leavese0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“IAA application affected significantly most of the chemical constituents of cotton leaves i.e., chlorophyll a, total soluble sugars and phenolic compounds especially poly-phenols”
Claim · model-written summary
Auxin-treated cotton had lower leaf inhibitor levels.
Not reportedTaxonComparator
Verbatim
e0“Auxin-treated plants contained less levels of inhibitors”
Claim · model-written summary
IAA at 75 and 100 ppm raised promoter concentrations.
Not reportedTaxonComparator
Verbatim
e0“application of 75 and 100 ppm IAA exerted higher concentration of promoters”
Claim · model-written summary
IAA promoted cotton height and dry matter production.
Not reportedTaxonTreatmentComparator
Verbatim
e0“enhanced the vegetative growth and resulted in significant increases in plant height and dry matter production”
Claim · model-written summary
IAA at 50 ppm increased flowers, bolls, and boll setting.
- Treatment
- IAA application of 50 ppme0
- Outcome
- numbers of flowers and total bolls per plant as well as higher boll setting percentagee0
- Direction
- highere0
Not reportedTaxonComparator
Verbatim
e0“IAA application of 50 ppm was resulted in plants producing higher numbers of flowers and total bolls per plant as well as higher boll setting percentage”
Claim · model-written summary
IAA at 100 ppm reduced open bolls per plant.
Not reportedTaxonComparator
Verbatim
e0“Applying 100 ppm IAA produced less number of open bolls/plant”
Claim · model-written summary
IAA increased boll weight, seed index, and earliness percentage.
- Treatment
- IAA applicatione0
- Outcome
- Boll weight, seed index, earliness percentagee0
- Direction
- increasede0
Not reportedTaxonComparator
Verbatim
e0“Boll weight, seed index, earliness percentage were increased by IAA application”
Claim · model-written summary
IAA at 50 ppm significantly increased seed cotton yield.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- 50 ppm of IAAe0
- Outcome
- seed cotton yielde0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Application of 50 ppm of IAA increased significantly seed cotton yield (kentar/feddan)”
Claim · model-written summary
IAA at 100 ppm reduced yield.
Not reportedTaxonComparator
Verbatim
e0“application of 100 ppm produced less yield”
Claim · model-written summary
High IAA concentration shifted growth toward vegetation at the expense of fruiting.
Not reportedTaxon
Verbatim
e0“high concentration induced the vegetative growth on the expense of fruiting growth”
Claim · model-written summary
IAA showed no significant response in lint percentage and fiber properties.
- Treatment
- IAA applicatione0
- Outcome
- lint percentage and fiber propertiese0
- Direction
- no significant responsee0
Not reportedTaxonComparator
Verbatim
e0“lint percentage and fiber properties showed no significant response due to IAA application”
The same questions in other papers
indole-3-acetic acid · yield · Gossypium hirsutum (cotton)Results differ
3 papers in the same direction as this paper · 1 in the opposite direction
- positive
- negative
- positive
1 paper more in this group
See all 5 papers →indole-3-acetic acid · quality: grain · Gossypium hirsutum (cotton)Results differ
1 paper in the same direction as this paper · 9 in the opposite direction
- positive
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7 papers more in this group
See all 11 papers →indole-3-acetic acid · molecular: metabolites · Gossypium hirsutum (cotton)Positive and negative results
2 papers in the same direction as this paper · 1 in the opposite direction
- negative
- positive
- 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.