Abstract
Abstract Gibberellic acid is a metabolic product of the fungus Gibberella fujikuroi , similar in physiological properties to the gibberellins described by Japanese investigators. Supplied in a nutrient solution to wheat plants growing in water culture, it causes increased growth of the shoots, as a result of increased length of stem internodes and leaves. The leaves are narrower and paler than those of untreated plants. Under similar conditions pea seedlings develop much elongated stem internodes, but the leaves are little changed in size. These morphological responses are similar to those seen in etiolation. The total dry weight of both peas and wheat so treated is increased; if shoots alone are considered the increase in dry weight is even greater; the dry weight of roots is reduced, though this does not occur if the gibberellic acid is applied to the shoots in a lanolin paste. The increased dry weight is mainly attributable to increased carbon assimilation. Treated plants contain more soluble carbohydrate than controls, but this accounts only for a small part of the increased carbon assimilation. The increase in glucose content is particularly striking. Gibberellic acid is rapidly biologically degraded in soil.
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Claims 11
Claim · model-written summary
Gibberellic acid supplied in nutrient solution increased wheat shoot growth.
- Taxon
- wheat
Triticum aestivume1 - Treatment
- Supplied in a nutrient solutione1
- Outcome
- growth of the shootse1
- Direction
- increasede1
- Comparator
- untreated plantse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Supplied in a nutrient solution to wheat plants growing in water culture, it causes increased growth of the shoots, as a result of increased length of stem internodes and leaves”
e2“The leaves are narrower and paler than those of untreated plants”
Claim · model-written summary
Gibberellic acid made wheat leaves narrower and paler than untreated plants.
- Taxon
- wheatTriticum aestivume1
- Treatment
- Supplied in a nutrient solutione1
- Outcome
- leavese2
- Direction
- narrower and palere2
- Comparator
- untreated plantse2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Supplied in a nutrient solution to wheat plants growing in water culture, it causes increased growth of the shoots, as a result of increased length of stem internodes and leaves”
e2“The leaves are narrower and paler than those of untreated plants”
Claim · model-written summary
Under similar conditions, gibberellic acid elongated stem internodes of pea seedlings.
- Taxon
- pea seedlings
Lathyrus oleraceuse3 - Treatment
- Under similar conditionse3
- Outcome
- stem internodese3
- Direction
- elongatede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“Under similar conditions pea seedlings develop much elongated stem internodes, but the leaves are little changed in size”
Claim · model-written summary
Under similar conditions, gibberellic acid left pea leaves little changed in size.
- Taxon
- pea seedlingsLathyrus oleraceuse3
- Treatment
- Under similar conditionse3
- Outcome
- leavese3
- Direction
- little changede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“Under similar conditions pea seedlings develop much elongated stem internodes, but the leaves are little changed in size”
Claim · model-written summary
Gibberellic acid increased total dry weight of wheat and pea.
- Taxon
- wheatTriticum aestivume4
- Treatment
- Supplied in a nutrient solutione1
- Outcome
- total dry weighte4
- Direction
- increasede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Supplied in a nutrient solution to wheat plants growing in water culture, it causes increased growth of the shoots, as a result of increased length of stem internodes and leaves”
e4“The total dry weight of both peas and wheat so treated is increased”
Claim · model-written summary
When only shoots are considered, the increase in dry weight from gibberellic acid is even greater in wheat.
- Taxon
- wheatTriticum aestivume1
- Treatment
- Supplied in a nutrient solutione1
- Outcome
- increase in dry weighte5
- Direction
- even greatere5
- Qualifier
- if shoots alone are considerede5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Supplied in a nutrient solution to wheat plants growing in water culture, it causes increased growth of the shoots, as a result of increased length of stem internodes and leaves”
e5“if shoots alone are considered the increase in dry weight is even greater”
Claim · model-written summary
Gibberellic acid reduced root dry weight of wheat, unless applied to the shoots in a lanolin paste.
- Taxon
- wheatTriticum aestivume1
- Treatment
- Supplied in a nutrient solutione1
- Outcome
- dry weight of rootse6
- Direction
- reducede6
- Qualifier
- applied to the shoots in a lanolin pastee6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Supplied in a nutrient solution to wheat plants growing in water culture, it causes increased growth of the shoots, as a result of increased length of stem internodes and leaves”
e6“the dry weight of roots is reduced, though this does not occur if the gibberellic acid is applied to the shoots in a lanolin paste”
Claim · model-written summary
The increased dry weight of gibberellic acid-treated wheat is mainly attributable to increased carbon assimilation.
- Taxon
- wheatTriticum aestivume1
- Outcome
- increased dry weighte7
- Qualifier
- increased carbon assimilatione7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Supplied in a nutrient solution to wheat plants growing in water culture, it causes increased growth of the shoots, as a result of increased length of stem internodes and leaves”
e7“The increased dry weight is mainly attributable to increased carbon assimilation”
Claim · model-written summary
Gibberellic acid-treated plants had more soluble carbohydrate than controls, a small part of the extra carbon assimilation.
- Taxon
- wheatTriticum aestivume1
- Treatment
- Treated plantse0
- Outcome
- soluble carbohydratee0
- Direction
- moree0
- Comparator
- controlse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Supplied in a nutrient solution to wheat plants growing in water culture, it causes increased growth of the shoots, as a result of increased length of stem internodes and leaves”
e0“Treated plants contain more soluble carbohydrate than controls, but this accounts only for a small part of the increased carbon assimilation”
Claim · model-written summary
Gibberellic acid-treated plants had a particularly striking increase in glucose content.
- Taxon
- wheatTriticum aestivume1
- Treatment
- Treated plantse0
- Outcome
- glucose contente2
- Direction
- increasee2
- Comparator
- controlse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Supplied in a nutrient solution to wheat plants growing in water culture, it causes increased growth of the shoots, as a result of increased length of stem internodes and leaves”
e0“Treated plants contain more soluble carbohydrate than controls, but this accounts only for a small part of the increased carbon assimilation”
e2“The increase in glucose content is particularly striking”
Claim · model-written summary
Gibberellic acid is rapidly biologically degraded in soil.
Not reportedTaxon
Verbatim
e0“Gibberellic acid is rapidly biologically degraded in soil”
The same questions in other papers
fertilization · growth · Triticum aestivum (wheat)Positive and negative results
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See all 755 papers →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.