Abstract
The effects of water deficits on plant morphology and biochemistry were analyzed in two photoperiodic strains of field-grown cotton (Gossypium hirsutum L.). Plants grown under dryland conditions exhibited a 40 to 85% decrease in leaf number, leaf area index, leaf size, plant height, and total weight per plant. Gross photosynthesis decreased from 0.81 to 0.47 milligram CO(2) fixed per meter per second and the average midday water, osmotic, and turgor potentials decreased to -2.1, -2.4, and 0.3 megapascals, respectively.There was a progressive increase in glutathione reductase activity and in the cellular antioxidant system in the leaves of stressed plants compared to the irrigated controls. The stress-induced increases in enzyme activity occurred at all canopy positions analyzed.Irrigation of the dryland plots following severe water stress resulted in a 50% increase in leaf area per gram fresh weight in newly expanded leaves of both strains over the leaves which had expanded under the dryland conditions. Paraquat resistance (a relative measure of the cellular antioxidant system) decreased in the strain T25 following irrigation. Glutathione reductase activities remained elevated in the T25 and T185 leaves which were expanded fully prior to irrigation and in the leaves which expanded following the irrigation treatment.
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Claims 10
Claim · model-written summary
Dryland conditions decreased leaf number, leaf area index and leaf size of field cotton by 40 to 85%.
- Taxon
- cotton
Gossypium hirsutume1 - Treatment
- dryland conditionse2
- Outcome
- leaf number, leaf area index, leaf sizee2
- Direction
- decreasee2
- Value
- 40 to 85%e2
- Setting
- field-growne1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The effects of water deficits on plant morphology and biochemistry were analyzed in two photoperiodic strains of field-grown cotton (Gossypium hirsutum L.)”
e2“Plants grown under dryland conditions exhibited a 40 to 85% decrease in leaf number, leaf area index, leaf size, plant height, and total weight per plant”
Claim · model-written summary
Dryland conditions decreased plant height and total weight per plant of field cotton by 40 to 85%.
- Taxon
- cottonGossypium hirsutume1
- Treatment
- dryland conditionse2
- Outcome
- plant height, and total weight per plante2
- Direction
- decreasee2
- Value
- 40 to 85%e2
- Setting
- field-growne1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The effects of water deficits on plant morphology and biochemistry were analyzed in two photoperiodic strains of field-grown cotton (Gossypium hirsutum L.)”
e2“Plants grown under dryland conditions exhibited a 40 to 85% decrease in leaf number, leaf area index, leaf size, plant height, and total weight per plant”
Claim · model-written summary
Gross photosynthesis decreased under water deficits in cotton, from 0.81 to 0.47 mg CO2 per square meter per second.
- Taxon
- cottonGossypium hirsutume1
- Treatment
- water deficitse1
- Outcome
- Gross photosynthesise3
- Direction
- decreasede3
- Value
- from 0.81 to 0.47 milligram CO(2) fixed per meter per seconde3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The effects of water deficits on plant morphology and biochemistry were analyzed in two photoperiodic strains of field-grown cotton (Gossypium hirsutum L.)”
e3“Gross photosynthesis decreased from 0.81 to 0.47 milligram CO(2) fixed per meter per second and the average midday water, osmotic, and turgor potentials decreased to -2.1, -2.4, and 0.3 megapascals, respectively”
Claim · model-written summary
Average midday water potential decreased under water deficits in cotton, to -2.1 MPa.
- Taxon
- cottonGossypium hirsutume1
- Treatment
- water deficitse1
- Outcome
- average midday watere3
- Direction
- decreasede3
- Value
- -2.1e3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The effects of water deficits on plant morphology and biochemistry were analyzed in two photoperiodic strains of field-grown cotton (Gossypium hirsutum L.)”
e3“Gross photosynthesis decreased from 0.81 to 0.47 milligram CO(2) fixed per meter per second and the average midday water, osmotic, and turgor potentials decreased to -2.1, -2.4, and 0.3 megapascals, respectively”
Claim · model-written summary
Average midday osmotic potential decreased under water deficits in cotton, to -2.4 MPa.
- Taxon
- cottonGossypium hirsutume1
- Treatment
- water deficitse1
- Outcome
- osmotice3
- Direction
- decreasede3
- Value
- -2.4e3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The effects of water deficits on plant morphology and biochemistry were analyzed in two photoperiodic strains of field-grown cotton (Gossypium hirsutum L.)”
e3“Gross photosynthesis decreased from 0.81 to 0.47 milligram CO(2) fixed per meter per second and the average midday water, osmotic, and turgor potentials decreased to -2.1, -2.4, and 0.3 megapascals, respectively”
Claim · model-written summary
Average midday turgor potential decreased under water deficits in cotton, to 0.3 MPa.
- Taxon
- cottonGossypium hirsutume1
- Treatment
- water deficitse1
- Outcome
- turgore3
- Direction
- decreasede3
- Value
- 0.3 megapascalse3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The effects of water deficits on plant morphology and biochemistry were analyzed in two photoperiodic strains of field-grown cotton (Gossypium hirsutum L.)”
e3“Gross photosynthesis decreased from 0.81 to 0.47 milligram CO(2) fixed per meter per second and the average midday water, osmotic, and turgor potentials decreased to -2.1, -2.4, and 0.3 megapascals, respectively”
Claim · model-written summary
Water deficits progressively increased glutathione reductase activity and the cellular antioxidant system in cotton leaves compared to irrigated controls, at all canopy positions.
- Taxon
- cottonGossypium hirsutume1
- Organ / stage
- leavese4
- Treatment
- water deficitse1
- Outcome
- glutathione reductase activity and in the cellular antioxidant systeme4
- Direction
- increasee4
- Qualifier
- at all canopy positions analyzede5
- Comparator
- irrigated controlse4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The effects of water deficits on plant morphology and biochemistry were analyzed in two photoperiodic strains of field-grown cotton (Gossypium hirsutum L.)”
e4“There was a progressive increase in glutathione reductase activity and in the cellular antioxidant system in the leaves of stressed plants compared to the irrigated controls”
e5“The stress-induced increases in enzyme activity occurred at all canopy positions analyzed”
Claim · model-written summary
Irrigation after severe water stress increased leaf area per gram fresh weight by 50% in newly expanded cotton leaves over leaves expanded under dryland conditions.
- Taxon
- cottonGossypium hirsutume1
- Organ / stage
- newly expanded leavese6
- Treatment
- Irrigation of the dryland plots following severe water stresse6
- Outcome
- leaf area per gram fresh weighte6
- Direction
- increasee6
- Value
- 50%e6
- Comparator
- the leaves which had expanded under the dryland conditionse6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The effects of water deficits on plant morphology and biochemistry were analyzed in two photoperiodic strains of field-grown cotton (Gossypium hirsutum L.)”
e6“Irrigation of the dryland plots following severe water stress resulted in a 50% increase in leaf area per gram fresh weight in newly expanded leaves of both strains over the leaves which had expanded under the dryland conditions”
Claim · model-written summary
Paraquat resistance decreased in cotton strain T25 following irrigation.
- Taxon
- cottonGossypium hirsutume1
- Material
- T25e7
- Treatment
- irrigatione7
- Outcome
- Paraquat resistancee7
- Direction
- decreasede7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The effects of water deficits on plant morphology and biochemistry were analyzed in two photoperiodic strains of field-grown cotton (Gossypium hirsutum L.)”
e7“Paraquat resistance (a relative measure of the cellular antioxidant system) decreased in the strain T25 following irrigation”
Claim · model-written summary
Glutathione reductase activities remained elevated in cotton strains T25 and T185 after the irrigation treatment.
- Taxon
- cottonGossypium hirsutume1
- Material
- T25 and T185e0
- Organ / stage
- leaves which were expanded fully prior to irrigatione0
- Treatment
- the irrigation treatmente0
- Outcome
- Glutathione reductase activitiese0
- Direction
- remained elevatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The effects of water deficits on plant morphology and biochemistry were analyzed in two photoperiodic strains of field-grown cotton (Gossypium hirsutum L.)”
e0“Glutathione reductase activities remained elevated in the T25 and T185 leaves which were expanded fully prior to irrigation and in the leaves which expanded following the irrigation treatment”
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