Abstract
Excised lettuce (Lactuca sativa L.) hypocotyl sections retain the ability to elongate in response to gibberellic acid (GA(3)) addition. In 48 hr at 30 C a GA(3)-treated segment more than doubles while a control segment elongates less than 50%. Auxin has no detectable effect on this system. Sensitivity to GA(3) is not decreased by apex or root removal. Of the experimental variables tested, temperature, sucrose, and preincubation in water affect growth both with and without GA(3). Blue and far red light inhibit growth without GA(3); this inhibition is reversed by GA(3). Potassium chloride stimulates growth of illuminated sections treated with GA(3) but has no effect on control growth. When sections are incubated in the dark, KCl has a promotive effect on elongation.
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Claims 9
Claim · model-written summary
GA(3)-treated lettuce hypocotyl segments more than doubled in length in 48 hr at 30 C, while control segments elongated less than 50%.
- Taxon
- lettuce
Lactuca sativae1 - Organ / stage
- hypocotyl sectionse1
- Treatment
- gibberellic acid (GA(3))e1
- Outcome
- elongatee1
- Direction
- more than doublese2
- Qualifier
- control segment elongates less than 50%e2
- Comparator
- control segmente2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Excised lettuce (Lactuca sativa L.) hypocotyl sections retain the ability to elongate in response to gibberellic acid (GA(3)) addition”
e2“In 48 hr at 30 C a GA(3)-treated segment more than doubles while a control segment elongates less than 50%”
Claim · model-written summary
Auxin had no detectable effect on lettuce hypocotyl section growth.
- Taxon
- lettuceLactuca sativae1
- Treatment
- Auxine3
- Outcome
- detectable effecte3
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Excised lettuce (Lactuca sativa L.) hypocotyl sections retain the ability to elongate in response to gibberellic acid (GA(3)) addition”
e3“Auxin has no detectable effect on this system”
Claim · model-written summary
Sensitivity to GA(3) of lettuce hypocotyl sections was not decreased by apex or root removal.
- Taxon
- lettuceLactuca sativae1
- Treatment
- apex or root removale4
- Outcome
- Sensitivity to GA(3)e4
- Direction
- not decreasede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Excised lettuce (Lactuca sativa L.) hypocotyl sections retain the ability to elongate in response to gibberellic acid (GA(3)) addition”
e4“Sensitivity to GA(3) is not decreased by apex or root removal”
Claim · model-written summary
Blue and far red light inhibited lettuce hypocotyl section growth in the absence of GA(3).
- Taxon
- lettuceLactuca sativae1
- Treatment
- Blue and far red lighte5
- Outcome
- growthe5
- Direction
- inhibite5
- Comparator
- without GA(3)e5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Excised lettuce (Lactuca sativa L.) hypocotyl sections retain the ability to elongate in response to gibberellic acid (GA(3)) addition”
e5“Blue and far red light inhibit growth without GA(3); this inhibition is reversed by GA(3)”
Claim · model-written summary
GA(3) reversed the blue and far red light inhibition of lettuce hypocotyl section growth.
- Taxon
- lettuceLactuca sativae1
- Treatment
- GA(3)e5
- Outcome
- inhibitione5
- Direction
- reversede5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Excised lettuce (Lactuca sativa L.) hypocotyl sections retain the ability to elongate in response to gibberellic acid (GA(3)) addition”
e5“Blue and far red light inhibit growth without GA(3); this inhibition is reversed by GA(3)”
Claim · model-written summary
Potassium chloride stimulated growth of illuminated lettuce sections treated with GA(3).
- Taxon
- lettuceLactuca sativae1
- Treatment
- Potassium chloridee6
- Outcome
- growthe6
- Direction
- stimulatese6
- Qualifier
- illuminated sections treated with GA(3)e6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Excised lettuce (Lactuca sativa L.) hypocotyl sections retain the ability to elongate in response to gibberellic acid (GA(3)) addition”
e6“Potassium chloride stimulates growth of illuminated sections treated with GA(3) but has no effect on control growth”
Claim · model-written summary
Potassium chloride had no effect on growth of control lettuce sections.
- Taxon
- lettuceLactuca sativae1
- Treatment
- Potassium chloridee6
- Outcome
- growthe6
- Direction
- no effecte6
- Comparator
- controle6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Excised lettuce (Lactuca sativa L.) hypocotyl sections retain the ability to elongate in response to gibberellic acid (GA(3)) addition”
e6“Potassium chloride stimulates growth of illuminated sections treated with GA(3) but has no effect on control growth”
Claim · model-written summary
Potassium chloride promoted elongation of lettuce sections incubated in the dark.
- Taxon
- lettuceLactuca sativae1
- Treatment
- KCle7
- Outcome
- elongatione7
- Direction
- promotive effecte7
- Qualifier
- incubated in the darke7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Excised lettuce (Lactuca sativa L.) hypocotyl sections retain the ability to elongate in response to gibberellic acid (GA(3)) addition”
e7“When sections are incubated in the dark, KCl has a promotive effect on elongation”
Claim · model-written summary
Temperature, sucrose and preincubation in water affected lettuce hypocotyl section growth both with and without GA(3).
- Taxon
- lettuceLactuca sativae1
- Treatment
- temperature, sucrose, and preincubation in watere2
- Outcome
- growthe2
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“Excised lettuce (Lactuca sativa L.) hypocotyl sections retain the ability to elongate in response to gibberellic acid (GA(3)) addition”
e2“Of the experimental variables tested, temperature, sucrose, and preincubation in water affect growth both with and without GA(3)”
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See all 300 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.