Abstract
B ertsch , W alter F., and W illiam S. H illman . (Yale U., New Haven, Conn.) The photoinhibition of growth in etiolated stem segments. I. Growth caused by sugars in Pisum. Amer. Jour. Bot. 48(6): 504–511. Illus. 1961.—Etiolated pea stem segments were used to study the red, far‐red reversible photoinhibition of stem growth. The growth of immature, apical tissue was insensitive to light after excision from the seedling, unless a growth‐promoting sugar (sucrose, glucose, fructose) was included in the medium. Red light specifically inhibited the growth caused by the sugars. Growth promotions of the same magnitude caused by indoleacetic acid or gibberellic acid were not reduced by irradiation of the tissue. The effects of various other sugars were tested. Arabinose and galactose, which do not promote growth, did not cause photosensitive growth in the isolated tissue. Mannose and xylose promoted growth at low concentrations, and this small promotion was inhibited by irradiation. Phptoinhibition occurred even at inhibitory concentrations of mannose and xylose. The distinctness of light‐sensitive growth is discussed, and the photoinhibition of a growth process which is limited by availability of sugars is suggested.
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Claims 8
Claim · model-written summary
Red light inhibited the growth of pea stem tissue caused by sugars.
- Taxon
- pea
Lathyrus oleraceuse0 - Treatment
- Red lighte1
- Compound
- sugarse1
- Outcome
- the growth caused by the sugarse1
- Direction
- inhibitede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Etiolated pea stem segments”
e1“Red light specifically inhibited the growth caused by the sugars”
Claim · model-written summary
Growth promoted by indoleacetic acid or gibberellic acid of the same magnitude was not reduced by irradiation.
- Taxon
- peaLathyrus oleraceuse0
- Treatment
- indoleacetic acid or gibberellic acide1
- Outcome
- Growth promotionse1
- Direction
- not reducede1
- Qualifier
- of the same magnitudee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Etiolated pea stem segments”
e1“Growth promotions of the same magnitude caused by indoleacetic acid or gibberellic acid were not reduced by irradiation of the tissue”
Claim · model-written summary
Arabinose and galactose did not cause photosensitive growth in isolated pea tissue.
- Taxon
- peaLathyrus oleraceuse0
- Compound
- Arabinose and galactosee1
- Outcome
- photosensitive growthe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Etiolated pea stem segments”
e1“Arabinose and galactose, which do not promote growth, did not cause photosensitive growth in the isolated tissue”
Claim · model-written summary
Mannose and xylose promoted growth at low concentrations.
- Taxon
- peaLathyrus oleraceuse0
- Treatment
- Mannose and xylosee1
- Outcome
- growthe1
- Direction
- promotede1
- Qualifier
- at low concentrationse1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Etiolated pea stem segments”
e1“Mannose and xylose promoted growth at low concentrations, and this small promotion was inhibited by irradiation”
Claim · model-written summary
The small growth promotion by mannose and xylose was inhibited by irradiation.
- Taxon
- peaLathyrus oleraceuse0
- Treatment
- irradiatione1
- Compound
- Mannose and xylosee1
- Outcome
- small promotione1
- Direction
- inhibitede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Etiolated pea stem segments”
e1“Mannose and xylose promoted growth at low concentrations, and this small promotion was inhibited by irradiation”
Claim · model-written summary
Photoinhibition occurred even at inhibitory concentrations of mannose and xylose.
- Taxon
- peaLathyrus oleraceuse0
- Outcome
- Phptoinhibitione1
- Qualifier
- even at inhibitory concentrations of mannose and xylosee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Etiolated pea stem segments”
e1“Phptoinhibition occurred even at inhibitory concentrations of mannose and xylose”
Claim · model-written summary
Photoinhibition of a growth process limited by sugar availability is suggested.
- Taxon
- peaLathyrus oleraceuse0
- Outcome
- the photoinhibition of a growth processe1
- Qualifier
- limited by availability of sugarse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Etiolated pea stem segments”
e1“the photoinhibition of a growth process which is limited by availability of sugars is suggested”
Claim · model-written summary
Growth of immature apical pea tissue excised from the seedling was insensitive to light unless sugar was supplied.
- Taxon
- peaLathyrus oleraceuse0
- Organ / stage
- immature, apical tissuee1
- Outcome
- growth of immature, apical tissuee1
- Qualifier
- insensitive to light after excision from the seedlinge1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Etiolated pea stem segments”
e1“The growth of immature, apical tissue was insensitive to light after excision from the seedling”
The same questions in other papers
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- positive
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25 papers in the same direction as this paper · 33 in the opposite direction
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See all 59 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.