Abstract
Abstract Concentrations up to 4000 ppm of (2-chloroethyl)phosphonic acid (ethephon) did not affect the net photosynthesis (Pn) of leaves on greenhouse grown apple trees. Leaf respiration was increased by 4000 ppm ethephon, but not by lower concn. Pn rates did not differ between cvs., but respiration of ‘Golden Delicious’ leaves was greater than that of ‘York’ leaves.
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Claims 5
Claim · model-written summary
Ethephon up to 4000 ppm did not affect net photosynthesis of apple leaves.
- Taxon
- apple trees
Malus domesticae0 - Organ / stage
- leavese0
- Treatment
- Concentrations up to 4000 ppm of (2-chloroethyl)phosphonic acid (ethephon)e0
- Outcome
- net photosynthesis (Pn)e0
- Direction
- did not affecte0
- Setting
- greenhousee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Concentrations up to 4000 ppm of (2-chloroethyl)phosphonic acid (ethephon) did not affect the net photosynthesis (Pn) of leaves on greenhouse grown apple trees”
Claim · model-written summary
At 4000 ppm, ethephon increased apple leaf respiration.
- Taxon
- apple treesMalus domesticae1
- Treatment
- 4000 ppm ethephone0
- Outcome
- Leaf respiratione0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leaf respiration was increased by 4000 ppm ethephon”
e1“apple trees”
Claim · model-written summary
Lower ethephon concentrations did not increase apple leaf respiration.
- Taxon
- apple treesMalus domesticae1
- Treatment
- lower concne0
- Outcome
- Leaf respiratione0
- Direction
- note0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leaf respiration was increased by 4000 ppm ethephon, but not by lower concn”
e1“apple trees”
Claim · model-written summary
Net photosynthetic rates did not differ among apple cultivars.
- Taxon
- apple treesMalus domesticae1
- Material
- cvs.e0
- Outcome
- Pn ratese0
- Direction
- did not differe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Pn rates did not differ between cvs.”
e1“apple trees”
Claim · model-written summary
Golden Delicious apple leaves respired more than York leaves.
- Taxon
- apple treesMalus domesticae1
- Material
- ‘Golden Delicious’e0
- Outcome
- respiratione0
- Direction
- greatere0
- Comparator
- ‘York’e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“respiration of ‘Golden Delicious’ leaves was greater than that of ‘York’ leaves”
e1“apple trees”
The same questions in other papers
(2-chloroethyl)phosphonic acid · physiology: photosynthesis · Malus domestica (apple)Results agree
2 papers in the same direction as this paper
- no effect
- 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.