Abstract
Sucrose, supplied to detached pea (Pisum sativum L. var Alaska) epicotyls through cut bases, supported better growth of apical tissue than supplied glucose and/or fructose. The hexoses were converted mainly to sucrose in basal regions of the epicotyl but some moved as such through the epicotyl and accumulated at the apex (plumule) at a rate faster than sucrose. A greater proportion of the carbon derived from supplied hexoses than from sucrose was used for synthesis of ethanol-insoluble products throughout the epicotyl. By use of asymmetrically labeled sucrose, it was shown that neither hexose moiety was used preferentially for the synthesis of metabolites. Supplied sucrose moved as such only up to the region of cell elongation where it was hydrolyzed and completely equilibrated before moving into more apical regions. The results indicate that better growth with supplied sucrose than hexose could not have resulted from differential effects on cell division, more rapid uptake or transport of sucrose, enhanced wall synthesis, or cleavage by sucrose synthase. It is concluded that transported sucrose versus hexoses must undergo or evoke different reactions which affect growth in the region of cell elongation.
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Claims 7
Claim · model-written summary
Supplied sucrose supported better apical growth than glucose or fructose.
- Taxon
- pea (Pisum sativum L. var Alaska)
Lathyrus oleraceuse0 - Material
- Alaskae0
- Treatment
- Sucrosee0
- Outcome
- growth of apical tissuee0
- Direction
- bettere0
- Comparator
- glucose and/or fructosee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Sucrose, supplied to detached pea (Pisum sativum L. var Alaska) epicotyls through cut bases, supported better growth of apical tissue than supplied glucose and/or fructose.”
Claim · model-written summary
Hexoses were converted mainly to sucrose in basal epicotyl regions.
- Taxon
- peaLathyrus oleraceust0
- Organ / stage
- basal regions of the epicotyle0
- Outcome
- hexoses were converted mainly to sucrosee0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The hexoses were converted mainly to sucrose in basal regions of the epicotyl”
t0“Pea Stem”
Claim · model-written summary
Some hexoses moved through the epicotyl and accumulated at the apex faster than sucrose.
- Taxon
- PeaLathyrus oleraceust0
- Outcome
- accumulated at the apex (plumule)e0
- Direction
- fastere0
- Comparator
- sucrosee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“some moved as such through the epicotyl and accumulated at the apex (plumule) at a rate faster than sucrose”
t0“Pea Stem”
Claim · model-written summary
A greater fraction of hexose-derived carbon entered ethanol-insoluble products than sucrose-derived carbon.
- Taxon
- PeaLathyrus oleraceust0
- Treatment
- supplied hexosese0
- Outcome
- synthesis of ethanol-insoluble productse0
- Direction
- greatere0
- Comparator
- sucrosee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A greater proportion of the carbon derived from supplied hexoses than from sucrose was used for synthesis of ethanol-insoluble products throughout the epicotyl.”
t0“Pea Stem”
Claim · model-written summary
Neither sucrose hexose moiety was preferentially used in metabolite synthesis.
- Taxon
- PeaLathyrus oleraceust0
- Outcome
- synthesis of metabolitese0
- Direction
- neither hexose moiety was used preferentiallye0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“neither hexose moiety was used preferentially for the synthesis of metabolites”
t0“Pea Stem”
Claim · model-written summary
Supplied sucrose moved intact to the elongation region, then hydrolyzed and equilibrated before moving apically.
- Taxon
- PeaLathyrus oleraceust0
- Outcome
- moved as such only up to the region of cell elongation where it was hydrolyzed and completely equilibratede0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Supplied sucrose moved as such only up to the region of cell elongation where it was hydrolyzed and completely equilibrated before moving into more apical regions.”
t0“Pea Stem”
Claim · model-written summary
The authors infer distinct reactions of transported sucrose and hexoses affect elongation-zone growth.
- Taxon
- PeaLathyrus oleraceust0
- Outcome
- growth in the region of cell elongatione0
- Qualifier
- different reactionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“transported sucrose versus hexoses must undergo or evoke different reactions which affect growth in the region of cell elongation”
t0“Pea Stem”
The same questions in other papers
sucrose · growth · Lathyrus oleraceus (pea)Positive and negative results
7 papers in the same direction as this paper · 3 in the opposite direction
- no effect
- no effect
- no effect
7 papers more in this group
See all 11 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.