Abstract
Ray, Peter M. (U. Michigan, Ann Arbor.) Cell wall synthesis and cell elongation in oat coleoptile tissue. Amer. Jour. Bot. 49(9): 928–939. Illus. 1962.—Cell wall synthesis in oat coleoptile cylinders tends to run parallel with but not usually proportional to cell elongation both under promotion by auxin and sugar and under inhibition by supraoptimal auxin or sugar, or by a variety of other inhibitors. Inhibitors of elongation fall into 2 classes with respect to their effects on wall synthesis: (1) those which inhibit the 2 processes approximately equally (galactose, mannose, mannitol, azide, iodoacetate, dinitrophenol, low temperature, supraoptimal auxin) and (2) those which inhibit elongation percentagewise much more strongly than wall synthesis, so that as complete inhibition of elongation is approached, substantial wall synthesis continues (Ca+ +, fluoride, arsenite, mercurials). When coleoptile cylinders elongate in the absence of sugar, the cell walls appear to become markedly thinner, and in some experiments negligible increase in total wall material apparently occurs. However, the amount of α-cellulose does rise. Increase in cell wall material occurs during elongation of cylinders at 2 C. The results are interpreted as indicating that during elongation the bulk of new cell wall material is added by apposition, but a certain proportion of the new material is probably introduced within the existing wall structure and induces its expansion.
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Claims 8
Claim · model-written summary
Oat coleoptile wall synthesis tended to parallel, but was not usually proportional to, cell elongation under promotion and inhibition.
- Taxon
- oat
Avena sativae0 - Organ / stage
- coleoptile cylinderse0
- Outcome
- Cell wall synthesise0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cell wall synthesis in oat coleoptile cylinders tends to run parallel with but not usually proportional to cell elongation both under promotion by auxin and sugar and under inhibition by supraoptimal auxin or sugar, or by a variety of other inhibitors.”
Claim · model-written summary
Galactose, mannose, mannitol, azide, iodoacetate, dinitrophenol, low temperature and supraoptimal auxin inhibited wall synthesis and elongation approximately equally.
- Taxon
- oatAvena sativae1
- Treatment
- galactose, mannose, mannitol, azide, iodoacetate, dinitrophenol, low temperature, supraoptimal auxine0
- Outcome
- 2 processese0
- Direction
- inhibite0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“those which inhibit the 2 processes approximately equally (galactose, mannose, mannitol, azide, iodoacetate, dinitrophenol, low temperature, supraoptimal auxin)”
e1“oat coleoptile cylinders”
Claim · model-written summary
Ca++, fluoride, arsenite and mercurials inhibited elongation more strongly than wall synthesis, which continued near complete elongation inhibition.
- Taxon
- oatAvena sativae1
- Treatment
- Ca+ +, fluoride, arsenite, mercurialse0
- Outcome
- elongatione0
- Direction
- inhibite0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“those which inhibit elongation percentagewise much more strongly than wall synthesis, so that as complete inhibition of elongation is approached, substantial wall synthesis continues (Ca+ +, fluoride, arsenite, mercurials)”
e1“oat coleoptile cylinders”
Claim · model-written summary
Oat coleoptile cell walls became markedly thinner when cylinders elongated without sugar.
- Taxon
- oatAvena sativae1
- Treatment
- absence of sugare0
- Outcome
- cell wallse0
- Direction
- markedly thinnere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When coleoptile cylinders elongate in the absence of sugar, the cell walls appear to become markedly thinner”
e1“oat coleoptile cylinders”
Claim · model-written summary
In some sugar-free oat coleoptile experiments, total wall material showed negligible increase.
- Taxon
- oatAvena sativae1
- Outcome
- total wall materiale0
- Direction
- negligible increasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“in some experiments negligible increase in total wall material apparently occurs”
e1“oat coleoptile cylinders”
Claim · model-written summary
The amount of α-cellulose rose in elongating oat coleoptiles without sugar.
- Taxon
- oatAvena sativae2
- Outcome
- amount of α-cellulosee0
- Direction
- risee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“However, the amount of α-cellulose does rise.”
e1“When coleoptile cylinders elongate in the absence of sugar”
e2“oat coleoptile cylinders”
Claim · model-written summary
Cell wall material increased during oat coleoptile cylinder elongation at 2 C.
- Taxon
- oatAvena sativae1
- Outcome
- cell wall materiale0
- Direction
- Increasee0
- Qualifier
- 2 Ce0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Increase in cell wall material occurs during elongation of cylinders at 2 C.”
e1“oat coleoptile cylinders”
Claim · model-written summary
The authors interpret new cell wall material as being added mainly by apposition, with a portion introduced within the wall to induce expansion.
- Taxon
- oatAvena sativae1
- Outcome
- new cell wall materiale0
- Qualifier
- added by appositione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“during elongation the bulk of new cell wall material is added by apposition, but a certain proportion of the new material is probably introduced within the existing wall structure and induces its expansion”
e1“oat coleoptile cylinders”
The same questions in other papers
calcium atom · growth · Avena sativa (oats)Positive and negative results
1 paper in the same direction as this paper · 3 in the opposite direction
- positive
- positive
- positive
1 paper more in this group
See all 5 papers →arsenite(3-) · growth · Avena sativa (oats)Results agree
1 paper in the same direction as this paper
- negative
fluoride · growth · Avena sativa (oats)Results agree
2 papers in the same direction as this paper
- negative
- 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.