Abstract
The ameliorative effect of salicylic acid (SA: 0.5 mM) on sunflower (Helianthus annuus L.) under Cu stress (5 mg l−1) was studied. Excess Cu reduced the fresh and dry weights of different organs (roots, stems and leaves) and photosynthetic pigments (chlorophyll a, b and carotenoids) in four-week-old plants. There was a considerable increase in Chl a/b ratio and lipid peroxidation in both the roots and leaves of plants under excess Cu. Soluble sugars and free amino acids in the roots also decreased under Cu stress. However, soluble sugars in the leaves, free amino acids in the stems and leaves, and proline content in all plant organs increased in response to Cu toxicity. Salicylic acid (SA) significantly reduced the Chl a/b ratio and the level of lipid peroxidation in Cu-stressed plants. Under excess Cu, a higher accumulation of soluble sugars, soluble proteins and free amino acids including proline occurred in plants treated with 0.5 mM SA. Exogenous application of SA appeared to induce an adaptive response to Cu toxicity including the accumulation of organic solutes leading to protective reactions to the photosynthetic pigments and a reduction in membrane damage in sunflower.
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Claims 6
Claim · model-written summary
Excess copper reduced organ weights and pigments.
- Taxon
- sunflower
Helianthus annuust0 - Treatment
- Excess Cue0
- Outcome
- fresh and dry weights of different organse0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Excess Cu reduced the fresh and dry weights of different organs (roots, stems and leaves) and photosynthetic pigments (chlorophyll a, b and carotenoids) in four-week-old plants.”
t0“Sunflower”
Claim · model-written summary
Copper increased chlorophyll ratio and lipid peroxidation.
- Taxon
- SunflowerHelianthus annuust0
- Treatment
- excess Cue0
- Outcome
- Chl a/b ratio and lipid peroxidatione0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There was a considerable increase in Chl a/b ratio and lipid peroxidation in both the roots and leaves of plants under excess Cu.”
t0“Sunflower”
Claim · model-written summary
Copper decreased root sugars and amino acids.
- Taxon
- SunflowerHelianthus annuust0
- Treatment
- Cu stresse0
- Outcome
- Soluble sugars and free amino acids in the rootse0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Soluble sugars and free amino acids in the roots also decreased under Cu stress.”
t0“Sunflower”
Claim · model-written summary
Copper increased leaf sugars, stem and leaf amino acids and proline in all organs.
- Taxon
- SunflowerHelianthus annuust0
- Treatment
- Cu toxicitye0
- Outcome
- soluble sugars in the leaves, free amino acids in the stems and leaves, and proline content in all plant organse0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“soluble sugars in the leaves, free amino acids in the stems and leaves, and proline content in all plant organs increased in response to Cu toxicity.”
t0“Sunflower”
Claim · model-written summary
Salicylic acid reduced chlorophyll ratio and lipid peroxidation in copper stressed plants.
- Taxon
- SunflowerHelianthus annuust0
- Treatment
- Salicylic acid (SA)e0
- Outcome
- Chl a/b ratio and the level of lipid peroxidatione0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Salicylic acid (SA) significantly reduced the Chl a/b ratio and the level of lipid peroxidation in Cu-stressed plants.”
t0“Sunflower”
Claim · model-written summary
Salicylic acid increased soluble sugars, proteins, amino acids and proline under copper stress.
- Taxon
- SunflowerHelianthus annuust0
- Treatment
- 0.5 mM SAe0
- Outcome
- soluble sugars, soluble proteins and free amino acids including prolinee0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Under excess Cu, a higher accumulation of soluble sugars, soluble proteins and free amino acids including proline occurred in plants treated with 0.5 mM SA.”
t0“Sunflower”
The same questions in other papers
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See all 6 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.