Abstract
The effectiveness of several abscisic acid (ABA) analogs as palliatives against salt stress in intact citrus plants has been tested in this work. The effect of ABA, 8 ′ -methylene ABA, 8 ′ -acetylene ABA, ABA methyl ester, 8 ′ -methylene ABA methyl ester, and 8 ′ -acetylene ABA methyl ester on citrus responses to salt stress was studied on 2-year-old grafted plants. Leaf abscission, chloride accumulation, ethylene production, and net photosynthetic rate were the parameters used to characterize the performance of plants under stress. Data indicate that 8 ′ -methylene ABA was the most effective compound in delaying the deleterious effects of high salinity on citrus plants. Its regular application reduced leaf chloride concentration, ethylene production, and leaf abscission. Furthermore, it delayed the depletion of CO 2 assimilation under these adverse conditions. Abscisic acid and 8 ′ -acetylene ABA also reduced salt-stress induced injuries in citrus, although to a lower extent. Neither ABA methyl ester nor its 8 ′ -C modified analogs showed biological activity in these assays.
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Claims 9
Claim · model-written summary
8 ′ -methylene ABA was the most effective analog in delaying salt injury in citrus.
CitrusNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“8 ′ -methylene ABA was the most effective compound in delaying the deleterious effects of high salinity on citrus plants”
Claim · model-written summary
Regular 8 ′ -methylene ABA reduced citrus leaf chloride concentration.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Its regular application reduced leaf chloride concentration, ethylene production, and leaf abscission”
e1“8 ′ -methylene ABA was the most effective compound in delaying the deleterious effects of high salinity on citrus plants”
Claim · model-written summary
Regular 8 ′ -methylene ABA reduced citrus ethylene production.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Its regular application reduced leaf chloride concentration, ethylene production, and leaf abscission”
e1“8 ′ -methylene ABA was the most effective compound in delaying the deleterious effects of high salinity on citrus plants”
Claim · model-written summary
Regular 8 ′ -methylene ABA reduced citrus leaf abscission.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Its regular application reduced leaf chloride concentration, ethylene production, and leaf abscission”
e1“8 ′ -methylene ABA was the most effective compound in delaying the deleterious effects of high salinity on citrus plants”
Claim · model-written summary
Regular 8 ′ -methylene ABA delayed depletion of citrus CO 2 assimilation under salinity.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“it delayed the depletion of CO 2 assimilation under these adverse conditions”
e1“8 ′ -methylene ABA was the most effective compound in delaying the deleterious effects of high salinity on citrus plants”
Claim · model-written summary
Abscisic acid reduced citrus salt injury, less effectively than 8 ′ -methylene ABA.
- Treatment
- Abscisic acide0
- Outcome
- salt-stress induced injuriese0
- Direction
- reducede0
- Qualifier
- to a lower extente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Abscisic acid and 8 ′ -acetylene ABA also reduced salt-stress induced injuries in citrus, although to a lower extent”
Claim · model-written summary
8 ′ -acetylene ABA reduced citrus salt injury, less effectively than 8 ′ -methylene ABA.
- Treatment
- 8 ′ -acetylene ABAe0
- Outcome
- salt-stress induced injuriese0
- Direction
- reducede0
- Qualifier
- to a lower extente0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Abscisic acid and 8 ′ -acetylene ABA also reduced salt-stress induced injuries in citrus, although to a lower extent”
Claim · model-written summary
ABA methyl ester showed no biological activity in citrus salt assays.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Neither ABA methyl ester nor its 8 ′ -C modified analogs showed biological activity in these assays”
e1“salt-stress induced injuries in citrus”
Claim · model-written summary
The 8 ′ -C modified ABA methyl ester analogs showed no biological activity in citrus salt assays.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Neither ABA methyl ester nor its 8 ′ -C modified analogs showed biological activity in these assays”
e1“salt-stress induced injuries in citrus”
The same questions in other papers
(+)-abscisic acid · yield · CitrusPositive and negative results
1 paper in the same direction as this paper · 2 in the opposite direction
- negative
- no effect
- positive
(+)-abscisic acid · physiology: hormones · CitrusResults agree
2 papers in the same direction as this paper
- positive
- positive
(+)-abscisic acid · molecular: metabolites · CitrusResults agree
3 papers in the same direction as this paper
- positive
- positive
- positive
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.