Abstract
Field experiment was conducted to study the effect of exogenous hormones on cotton(Gossypium hirsutum L.cv SCRC 28) growth and development during the early growth period.Six different concentrations of three exogenous hormones were designed,which were heteroauxin(IAA) 5 mg.L-1 and 10 mg.L-1,6-benzyl adenine(6-BA) 50 mg.L-1 and 100 mg.L-1,gibberellin acid(GA) 20 mg.L-1 and 50 mg.L-1,with water as control,for foliar application three times from seedling stage(6-7 true leaves) to squaring stage.The results showed that the vertical growth rates of main stem of cotton plants with six different concentrations of exogenous hormones by foliar application during seedling stage were all slower than those of control.Diameters at cotyledonary node of main stem of cotton plants with six exogenous hormones treatments were greater than those of control.The growth rates of leaves of cotton plants were significantly speeded up by treatment of 50 mg.L-1 GA,with the leaf areas of whole plants increasing significantly.SPAD values of chlorophyll in functional leaves(4th leaf from the top) of cotton plants with six different concentrations of exogenous hormone treatments were significantly higher than those of control.Treatments with different concentrations of IAA,GA promoted the development of bud of cotton plants,and the treatment of 20 mg.L-1 GA achieved marked effect.The results above showed that in the experimental conditions vegetative and reproductive growth of cotton plant could be coordinated and buds could be better developed from seedling stage to squaring stage by foliar spraying IAA with concentrations of 5 mg.L-1,10 mg.L-1 or GA with concentrations of 20 mg.L-1,50 mg.L-1.Effect of GA was better than that of IAA,and effect of 20 mg.L-1 GA was the best among 4 treatments.Treatments with 6-BA was noneffective to promote the development of buds.
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Claims 9
Claim · model-written summary
All six foliar hormone treatments slowed vertical main stem growth in cotton seedlings relative to water.
- Taxon
- cotton
Gossypium hirsutume0 - Organ / stage
- seedling stagee0
- Treatment
- six different concentrations of exogenous hormonese0
- Outcome
- vertical growth rates of main steme0
- Direction
- slowere0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“vertical growth rates of main stem of cotton plants with six different concentrations of exogenous hormones by foliar application during seedling stage were all slower than those of control”
Claim · model-written summary
All six hormone treatments increased cotton main stem diameter at the cotyledonary node relative to control.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- six exogenous hormones treatmentse0
- Outcome
- Diameters at cotyledonary node of main steme0
- Direction
- greatere0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Diameters at cotyledonary node of main stem of cotton plants with six exogenous hormones treatments were greater than those of control”
Claim · model-written summary
GA at 50 mg.L-1 significantly accelerated cotton leaf growth and increased whole plant leaf area.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- 50 mg.L-1 GAe0
- Outcome
- growth rates of leavese0
- Direction
- speeded upe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“growth rates of leaves of cotton plants were significantly speeded up by treatment of 50 mg.L-1 GA,with the leaf areas of whole plants increasing significantly”
Claim · model-written summary
GA at 50 mg.L-1 significantly increased whole plant leaf area in cotton.
- Taxon
- cottonGossypium hirsutumt0
- Treatment
- 50 mg.L-1 GAe0
- Outcome
- leaf areas of whole plantse0
- Direction
- increasinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“treatment of 50 mg.L-1 GA,with the leaf areas of whole plants increasing significantly”
t0“Effect of Exogenous Hormones on Cotton (Gossypium hirsutum L.) Growth and Development during the Early Growth Period”
Claim · model-written summary
All six hormone treatments raised SPAD chlorophyll values in cotton functional leaves relative to control.
- Taxon
- cottonGossypium hirsutume0
- Organ / stage
- functional leaves(4th leaf from the top)e0
- Treatment
- six different concentrations of exogenous hormone treatmentse0
- Outcome
- SPAD values of chlorophylle0
- Direction
- highere0
- Comparator
- controle0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“SPAD values of chlorophyll in functional leaves(4th leaf from the top) of cotton plants with six different concentrations of exogenous hormone treatments were significantly higher than those of control”
Claim · model-written summary
IAA treatments promoted cotton bud development.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- IAAe0
- Outcome
- development of bude0
- Direction
- promotede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Treatments with different concentrations of IAA,GA promoted the development of bud of cotton plants”
Claim · model-written summary
GA treatments promoted cotton bud development, particularly at 20 mg.L-1.
- Taxon
- cottonGossypium hirsutume0
- Treatment
- 20 mg.L-1 GAe0
- Outcome
- development of bude0
- Direction
- promotede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Treatments with different concentrations of IAA,GA promoted the development of bud of cotton plants,and the treatment of 20 mg.L-1 GA achieved marked effect”
Claim · model-written summary
GA was better than IAA for coordinating cotton growth and bud development, with 20 mg.L-1 GA best among four treatments.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Effect of GA was better than that of IAA,and effect of 20 mg.L-1 GA was the best among 4 treatments”
t0“Effect of Exogenous Hormones on Cotton (Gossypium hirsutum L.) Growth and Development during the Early Growth Period”
Claim · model-written summary
6-BA did not promote cotton bud development.
- Taxon
- CottonGossypium hirsutumt0
- Treatment
- 6-BAe0
- Outcome
- development of budse0
- Direction
- noneffectivee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Treatments with 6-BA was noneffective to promote the development of buds”
t0“Effect of Exogenous Hormones on Cotton (Gossypium hirsutum L.) Growth and Development during the Early Growth Period”
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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.