Abstract
The effect of ethylene on the uptake, decarboxylation and basipetal transport of IAA-1-14C, IAA-2-14C and NAA-1-14C in cotton stem sections (Gossypium hirsutum L., var. Stoneville 213) was studied. A reduction in the capacity of cotton stem sections to transport auxin basipetally appears in sections excised from plants exposed to ethylene for only 3 hr and increases with fumigation time. In addition to reducing transport, increasing ethylene pretreatment periods from 3 to 15 hr also progressively reduced the uptake of 14C and increased the release of 14C as 14CO2 from IAA-1-14C. The effect of ethylene on the decarboxylation of IAA-1-14C was significant when expressed as either the cpm of 14C released per hr per mg dry weight or the cpm released per hr per mm2 in contact with the IAA donor. Comparative experiments using IAA-1-14C and IAA-2-14C demonstrated that the effect of ethylene on the decarboxylation of IAA was primarily a cut surface effect which apparently contributes to the reduction of IAA uptake by ethylene. Although ethylene significantly reduced the transport of NAA-1-14C, uptake was significantly increased rather than decreased as with IAA-1-14C while decarboxylation was unaffected. Ethylene pretreatment caused no significant changes in the dry weight or the cross-sectional area of the absorbing surface of the transport tissue.
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Claims 9
Claim · model-written summary
Ethylene for only 3 hr reduced the basipetal auxin transport capacity of cotton stem sections, and the reduction increased with fumigation time.
- Taxon
- Gossypium hirsutum
Gossypium hirsutume0 - Material
- Stoneville 213e0
- Organ / stage
- stem sectionse0
- Treatment
- ethylenee1
- Outcome
- capacity of cotton stem sections to transport auxin basipetallye1
- Direction
- reductione1
- Qualifier
- for only 3 hre1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cotton stem sections (Gossypium hirsutum L., var. Stoneville 213)”
e1“A reduction in the capacity of cotton stem sections to transport auxin basipetally appears in sections excised from plants exposed to ethylene for only 3 hr and increases with fumigation time”
Claim · model-written summary
Increasing ethylene pretreatment from 3 to 15 hr progressively reduced the uptake of 14C from IAA-1-14C in cotton stem sections.
- Taxon
- Gossypium hirsutumGossypium hirsutume0
- Organ / stage
- stem sectionse0
- Treatment
- increasing ethylene pretreatment periods from 3 to 15 hre1
- Compound
- IAA-1-14Ce1
- Outcome
- uptake of 14Ce1
- Direction
- reducede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cotton stem sections (Gossypium hirsutum L., var. Stoneville 213)”
e1“increasing ethylene pretreatment periods from 3 to 15 hr also progressively reduced the uptake of 14C and increased the release of 14C as 14CO2 from IAA-1-14C”
Claim · model-written summary
Increasing ethylene pretreatment from 3 to 15 hr increased the release of 14C as 14CO2 from IAA-1-14C in cotton stem sections.
- Taxon
- Gossypium hirsutumGossypium hirsutume0
- Organ / stage
- stem sectionse0
- Treatment
- increasing ethylene pretreatment periods from 3 to 15 hre1
- Compound
- IAA-1-14Ce1
- Outcome
- release of 14C as 14CO2e1
- Direction
- increasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cotton stem sections (Gossypium hirsutum L., var. Stoneville 213)”
e1“increasing ethylene pretreatment periods from 3 to 15 hr also progressively reduced the uptake of 14C and increased the release of 14C as 14CO2 from IAA-1-14C”
Claim · model-written summary
Ethylene had a significant effect on the decarboxylation of IAA-1-14C in cotton stem sections; the direction is not stated.
- Taxon
- Gossypium hirsutumGossypium hirsutume0
- Organ / stage
- stem sectionse0
- Treatment
- ethylenee1
- Compound
- IAA-1-14Ce1
- Outcome
- decarboxylatione1
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cotton stem sections (Gossypium hirsutum L., var. Stoneville 213)”
e1“The effect of ethylene on the decarboxylation of IAA-1-14C was significant”
Claim · model-written summary
Ethylene effect on IAA decarboxylation was primarily a cut surface effect that apparently contributes to reduced IAA uptake in cotton stem sections.
- Taxon
- Gossypium hirsutumGossypium hirsutume0
- Treatment
- ethylenee1
- Outcome
- reduction of IAA uptakee1
- Qualifier
- cut surface effecte1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cotton stem sections (Gossypium hirsutum L., var. Stoneville 213)”
e1“Comparative experiments using IAA-1-14C and IAA-2-14C demonstrated that the effect of ethylene on the decarboxylation of IAA was primarily a cut surface effect which apparently contributes to the reduction of IAA uptake by ethylene”
Claim · model-written summary
Ethylene significantly reduced the transport of NAA-1-14C in cotton stem sections.
- Taxon
- Gossypium hirsutumGossypium hirsutume0
- Treatment
- ethylenee1
- Compound
- NAA-1-14Ce1
- Outcome
- transporte1
- Direction
- reducede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cotton stem sections (Gossypium hirsutum L., var. Stoneville 213)”
e1“Although ethylene significantly reduced the transport of NAA-1-14C, uptake was significantly increased rather than decreased as with IAA-1-14C while decarboxylation was unaffected”
Claim · model-written summary
Ethylene significantly increased uptake of NAA-1-14C, whereas uptake of IAA-1-14C decreased under ethylene.
- Taxon
- Gossypium hirsutumGossypium hirsutume0
- Treatment
- ethylenee1
- Compound
- NAA-1-14Ce1
- Outcome
- uptakee1
- Direction
- increasede1
- Comparator
- IAA-1-14Ce1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cotton stem sections (Gossypium hirsutum L., var. Stoneville 213)”
e1“Although ethylene significantly reduced the transport of NAA-1-14C, uptake was significantly increased rather than decreased as with IAA-1-14C while decarboxylation was unaffected”
Claim · model-written summary
Ethylene left decarboxylation of NAA-1-14C unaffected in cotton stem sections.
- Taxon
- Gossypium hirsutumGossypium hirsutume0
- Treatment
- ethylenee1
- Compound
- NAA-1-14Ce1
- Outcome
- decarboxylatione1
- Direction
- unaffectede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cotton stem sections (Gossypium hirsutum L., var. Stoneville 213)”
e1“Although ethylene significantly reduced the transport of NAA-1-14C, uptake was significantly increased rather than decreased as with IAA-1-14C while decarboxylation was unaffected”
Claim · model-written summary
Ethylene pretreatment caused no significant change in dry weight or cross-sectional area of the absorbing surface of the transport tissue of cotton stem sections.
- Taxon
- Gossypium hirsutumGossypium hirsutume0
- Treatment
- Ethylene pretreatmente1
- Outcome
- dry weight or the cross-sectional area of the absorbing surface of the transport tissuee1
- Direction
- no significant changese1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cotton stem sections (Gossypium hirsutum L., var. Stoneville 213)”
e1“Ethylene pretreatment caused no significant changes in the dry weight or the cross-sectional area of the absorbing surface of the transport tissue”
The same questions in other papers
ethene · growth · Gossypium hirsutum (cotton)Positive and negative results
1 paper in the same direction as this paper · 2 in the opposite direction
- positive
- positive
- no effect
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.