Abstract
Effects of gibberellin A 3 (GA) on growth, pigments, protein, and nucleic acid content of the cotyledons of lettuce seedlings (Lactuca sativa L. cv. Grand Rapids) are reported. GA treatment increased both the total shoot and cotyledon fresh weights, and decreased chlorophyll content per cotyledon and on a dry weight basis. GA also decreased the protein content of the cotyledon, but increased the level of RNA and DNA measured on a dry weight basis. The hormone had no effect on the pheophytin: chlorophyll ratio, but increased the ratios of chlorophyll a: chlorophyll b, phytol: chlorophyll, and carotene: chlorophyll. GA also increased the sugar content of the cotyledons. Treatment of excised cotyledons with glucose had an effect similar to that of GA on chlorophyll and protein content. The data are discussed in relation to the mechanism of GA-induced chlorosis.
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Claims 8
Claim · model-written summary
GA treatment increased total shoot and cotyledon fresh weights of lettuce seedlings.
- Taxon
- Lactuca sativa
Lactuca sativae0 - Material
- Grand Rapidse0
- Organ / stage
- cotyledone1
- Treatment
- GA treatmente1
- Outcome
- total shoot and cotyledon fresh weightse1
- Direction
- increasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Effects of gibberellin A 3 (GA) on growth, pigments, protein, and nucleic acid content of the cotyledons of lettuce seedlings (Lactuca sativa L. cv. Grand Rapids)”
e1“GA treatment increased both the total shoot and cotyledon fresh weights, and decreased chlorophyll content per cotyledon and on a dry weight basis”
Claim · model-written summary
GA treatment decreased chlorophyll content per cotyledon and on a dry weight basis in lettuce seedlings.
- Taxon
- Lactuca sativaLactuca sativae0
- Material
- Grand Rapidse0
- Organ / stage
- cotyledone1
- Treatment
- GA treatmente1
- Outcome
- chlorophyll contente1
- Direction
- decreasede1
- Qualifier
- per cotyledon and on a dry weight basise1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Effects of gibberellin A 3 (GA) on growth, pigments, protein, and nucleic acid content of the cotyledons of lettuce seedlings (Lactuca sativa L. cv. Grand Rapids)”
e1“GA treatment increased both the total shoot and cotyledon fresh weights, and decreased chlorophyll content per cotyledon and on a dry weight basis”
Claim · model-written summary
GA decreased the protein content of lettuce cotyledons.
- Taxon
- Lactuca sativaLactuca sativae0
- Organ / stage
- cotyledone2
- Treatment
- GAe2
- Outcome
- protein contente2
- Direction
- decreasede2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Effects of gibberellin A 3 (GA) on growth, pigments, protein, and nucleic acid content of the cotyledons of lettuce seedlings (Lactuca sativa L. cv. Grand Rapids)”
e2“GA also decreased the protein content of the cotyledon, but increased the level of RNA and DNA measured on a dry weight basis”
Claim · model-written summary
GA increased the level of RNA and DNA on a dry weight basis in lettuce cotyledons.
- Taxon
- Lactuca sativaLactuca sativae0
- Treatment
- GAe2
- Outcome
- RNA and DNAe2
- Direction
- increasede2
- Qualifier
- measured on a dry weight basise2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Effects of gibberellin A 3 (GA) on growth, pigments, protein, and nucleic acid content of the cotyledons of lettuce seedlings (Lactuca sativa L. cv. Grand Rapids)”
e2“GA also decreased the protein content of the cotyledon, but increased the level of RNA and DNA measured on a dry weight basis”
Claim · model-written summary
GA had no effect on the pheophytin:chlorophyll ratio of lettuce cotyledons.
- Taxon
- Lactuca sativaLactuca sativae0
- Treatment
- The hormonee3
- Outcome
- pheophytin: chlorophyll ratioe3
- Direction
- no effecte3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Effects of gibberellin A 3 (GA) on growth, pigments, protein, and nucleic acid content of the cotyledons of lettuce seedlings (Lactuca sativa L. cv. Grand Rapids)”
e3“The hormone had no effect on the pheophytin: chlorophyll ratio, but increased the ratios of chlorophyll a: chlorophyll b, phytol: chlorophyll, and carotene: chlorophyll”
Claim · model-written summary
GA increased the ratios of chlorophyll a:chlorophyll b, phytol:chlorophyll and carotene:chlorophyll in lettuce cotyledons.
- Taxon
- Lactuca sativaLactuca sativae0
- Treatment
- The hormonee3
- Outcome
- ratios of chlorophyll a: chlorophyll b, phytol: chlorophyll, and carotene: chlorophylle3
- Direction
- increasede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Effects of gibberellin A 3 (GA) on growth, pigments, protein, and nucleic acid content of the cotyledons of lettuce seedlings (Lactuca sativa L. cv. Grand Rapids)”
e3“The hormone had no effect on the pheophytin: chlorophyll ratio, but increased the ratios of chlorophyll a: chlorophyll b, phytol: chlorophyll, and carotene: chlorophyll”
Claim · model-written summary
GA increased the sugar content of lettuce cotyledons.
- Taxon
- Lactuca sativaLactuca sativae0
- Organ / stage
- cotyledonse4
- Treatment
- GAe4
- Outcome
- sugar contente4
- Direction
- increasede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Effects of gibberellin A 3 (GA) on growth, pigments, protein, and nucleic acid content of the cotyledons of lettuce seedlings (Lactuca sativa L. cv. Grand Rapids)”
e4“GA also increased the sugar content of the cotyledons”
Claim · model-written summary
Glucose applied to excised lettuce cotyledons had an effect similar to GA on chlorophyll and protein content.
- Taxon
- Lactuca sativaLactuca sativae0
- Organ / stage
- excised cotyledonse5
- Treatment
- glucosee5
- Compound
- glucosee5
- Outcome
- chlorophyll and protein contente5
- Direction
- no_changeinferrede5
- Comparator
- GAe5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Effects of gibberellin A 3 (GA) on growth, pigments, protein, and nucleic acid content of the cotyledons of lettuce seedlings (Lactuca sativa L. cv. Grand Rapids)”
e5“Treatment of excised cotyledons with glucose had an effect similar to that of GA on chlorophyll and protein content”
The same questions in other papers
Gibberellic acid · quality: protein · Lactuca sativa (garden lettuce)Results differ
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- positive
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See all 5 papers →Gibberellic acid · growth · Lactuca sativa (garden lettuce)Results differ
35 papers in the same direction as this paper · 8 in the opposite direction · 1 reporting no difference from an alternative
- no effect
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See all 45 papers →Gibberellic acid · physiology: pigments · Lactuca sativa (garden lettuce)Positive and negative results
1 paper in the same direction as this paper · 2 in the opposite direction
- positive
- 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.